PM25 pump.book - Poclain Hydraulics

Transcription

PM 25
V A R IA B LE D IS P L A C E M E N T P U M P
C L O S E D LO O P C IR C U IT
T E C H N I C A L
C A T A L O G
PM25 - Variable displacement pump
POCLAIN HYDRAULICS
OVERVIEW
PM25 is a variable displacement, axial piston pump, with swashplate system, for closed loop hydrostatic transmissions.
It provides a continuously variable flow rate between zero and maximum in forward and reverse direction. Flow rate is proportional to rotation
speed and swashplate angle.
It can feature a charge pump to keep the circuit pressurised. This avoids risk of cavitations and ensures a good performance of the transmission.
It offers several types of control: servo hydraulic, hydraulic automotive, direct or servo mechanical, electrical and electro-proportional.
It is equipped with high pressure relief valves and can be delivered with auxiliary gear pumps.
It is available in single or tandem versions.
As options, PM25 can be featured with flushing valve, filter on charge pressure line and safety devices to ensure safe operation of the machine.
PM25-20
PM25-25
PM25-28
Displacement
cm³/rev
[in³/rev.]
20,5
[1.25]
25,7
[1.57]
28
[1.71]
Theoretical Flow
at rated speed
L/min
[GPM]
73,8
[19.50]
92,5
[24.44]
100,8
[26.63]
Rated speed
rpm
Rated pressure
bar [PSI]
250 [3 625]
Max. Pressure
bar [PSI]
350 [5 076]
SAE B
Mounting flange
Hydraulic, hydraulic automotive, direct or servo mechanical,
electrical, electro-proportional
Controls
Mass
Rotation
2
3 600
kg [lb]
from 13 [28.7] to 18 [39.7]
Clockwise or Counterclockwise
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6
7
7
OPERATING PARAMETERS
9
Operating parameters
Charge pressure
Case pressure
Pressure ratings
Speed ratings
Inlet pressure
Theoretical output
Poclain Hydraulics recommandations for fluid
Fluid and filtration
Viscosity range
9
9
9
9
9
10
10
10
11
11
SYSTEM DESIGN PARAMETERS
12
Sizing equations
Redundant braking system requirement
Loop flushing
Reservoir
Case drain usage for tandem pump
Differential pressure
Bearing life and external shaft loading
Hydraulic unit life
Mounting flange loads
12
12
12
13
13
13
14
15
15
FEATURES
16
High pressure relief valve
Charge relief valve
Charge pump
Displacement limiters
By-pass
Mounting flange and shafts
Auxiliary mounting pad
Tandem pumps
Gear pumps
16
17
18
19
19
20
22
24
25
CONTROLS
26
Direct mechanical control
Mechanical servo control with feed back
Hydraulic servo control
Electrical on-off servo control
Electrico-proportional servo control
Hydraulic automotive control
26
28
30
32
34
36
OPTIONS
39
Roller bearing
Fluorinated elastomer seals
UNF threads ports
Filter on pressure line
External connections for filter
Pressure cut-off valve
Mechanical inching
Hydraulic inching
Neutral position switch
Flushing valve
Finishing coat
Customized identification plate
Anti-stall valve
39
39
39
40
41
41
42
42
43
44
44
45
45
Technical
specifications
6
Features
Main dimensions
Port characteristics
Operating
Parameters
TECHNICAL SPECIFICATIONS
System design
Parameters
4
Features
MODEL CODE
Controls
CONTENT
Model
Code
Variable displacement pump - PM25
Options
POCLAIN HYDRAULICS
3
MODEL CODE
POCLAIN HYDRAULICS
MODEL
1
2
3
4
5
6
P M 2 5
1
Displacement cm3/rev [in3/rev]
20,5 [1.25]
25,7 [1.57]
28 [1.71]
20
25
28
2
Mounting flange and shaft
SAE B; z=13; 16/32 D.P.
SAE B; z=15; 16/32 D.P.
SAE B; Key shaft Ø 22,22 mm [dia. 0.87 in]
Shaft for secondary tandem pump
S3
S4
C3
T1
3
Control
Hydraulic automotive control 12V
Hydraulic automotive control 24V
Electrical on-off servo control with return spring without electrovalve
Electrical on-off servo control with return spring and electrovalve 12V
Electrical on-off servo control with return spring and electrovalve 24V
Electrical on-off servo control without electrovalve
Electrical on-off servo control with electrovalve 12V
Electrical on-off servo control with electrovalve 24V
Electro-proportional servo control 12V
Electro-proportional servo control 24V
4
Restrictor mm [in]
Without restrictor
Ø 0,6 [dia. 0.023]
Ø 0,7 [dia. 0.027]
Ø 0,8 [dia. 0.031]
Ø 0,9 [dia. 0.035]
Ø 1,0 [dia. 0.039]
Ø 1,2 [dia. 0.047]
5
High pressure relief valve setting
Max. system pressure bar [PSI]
Without valve (only check valve)
150 [2 175]
200 [2 900]
250 [3 625]
300 [4 351]
350 [5 076]
M
A
S
D12
D24
B00
B12
B24
C00
C12
C24
P12
P24
00
06
07
08
09
10
12
6
Rotation
Clockwise
Counter clockwise
00
15
20
25
30
35
R
L
Restrictors can be assembled for controls type
A, B, C, P, S, D.
4
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POCLAIN HYDRAULICS
8
9
10
11
9
Without auxiliary mounting pad
German group 2 flange
SAE A flange; z = 9
Tandem (without charge pump)
S
G
A
T
10
Gear pump cm3/rev [cu.in/rev]
Without gear pump
4,0 [0.24]
6,0 [0.37]
8,5 [0.52]
11,0 [0.67]
(if digit 9 = G)
14,0 [0.85]
16,5 [1.00]
19,5 [1.19]
4,0 [0.24]
6,0 [0.37]
8,5 [0.52]
11,0 [0.67]
SAE A flange
14,0 [0.85]
(if digit 9 = A)
16,5 [1.00]
19,5 [1.19]
22,5 [1.37]
26,0 [1.59]
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System design
Parameters
00
08
12
00
CR
EV
F0
F2
F3
FU
IC
HI
LP
MI
VS
PA
DP
SD
In case of request for a combination of several
options, please contact your Poclain Hydraulics
application engineer for further information.
00
04
06
08
11
14
17
20
04
06
08
11
14
17
20
22
26
Controls
8
Charge pump displacement cm3/rev [in3/rev]
Without charge pump
9,1 [0.55] (For all auxiliary mounting pads)
12 [0.73] (For auxiliary mounting pad A or S)
11
Options
Without option
Roller bearing
Filter on pressure line without clogging indicator
Filter on pressure line with clogging indicator
UNF Threads ports
Mechanical inching for control D
Hydraulic inching for control D
Neutral position switch for control A
Flushing valve
Finishing coat
Anti-stall valve
Features
00
10
22
Options
7
Charge relief valve setting bar [PSI]
Without charge relief valve
10 [145] (Only for control M)
22 [319] (For all controls)
Operating
Parameters
Technical
specifications
7
Model
Code
CODE
5
POCLAIN HYDRAULICS
TECHNICAL SPECIFICATIONS
Features
PM25-20
PM25-25
PM25-28
Displacement
cm³/rev
[in³/rev.]
20,5
[1.25]
25,7
[1.57]
28
[1.71]
Theoretical flow at rated
speed (3600 rpm)
L/min
[GPM]
73,8
[19.50]
92,5
[24.44]
100,8
[26.63]
Max. Theoretical absorbed
power at 320 bar [4 641 PSI]
KW
39,4
49,3
53,8
Theorical absorbed torque
N.m
[in.lbf]
32,6
[288]
40,9
[362]
44,6
[395]
at 100 bar [1 450 PSI]
Moment of inertia
kg.m²
[slug.ft²]
0.0014 [0.0010]
Internal charge pump
cm3/rev
[in3/rev]
9,1 [0.55] or 12 [0.73]
Charge relief valve setting
bar
[PSI]
From 10 [145] to 30 [435]
High pressure relief setting
bar
[PSI]
Max. 350 [5 076]
kg [lb]
18 [39.7] with control M
22,2 [48.9] with controls A, B, C, P, S
24,7 [54.4] with control D
SAE B
Mounting flange
Mass
¨
6
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POCLAIN HYDRAULICS
Model
Code
Main dimensions
PM 25 - SAE B - splined shaft with servo hydraulic control and without auxiliary mounting pad
3
S4
A
4
5
6
7
8
9
S
91 [3.58]
Ø 15 [dia. 0.59]
26 [1.02]
+0
[dia. 4.00 -0.002 ]
Clockwise (R)
[0.37
0
-0.002
]
66,5 [2.62]
26 [1.02]
Ø 101,6
0
-0.05
35 [1.38]
X
+0
-0.054
63 [2.48]
118 [4.65]
91 [3.58]
9,5
11
10
Technical
specifications
P M 2 5
2
Counter
clockwise (L)
Operating
Parameters
1
145 [5.71]
88,5 [3.48]
142 [5.59]
174 [6.85]
System design
Parameters
View X
Features
43
[1.69]
33 [1.30]
11,5 [0.45]
11,5 [0.45]
95 [3.74]
90 [3.54]
33 [1.30]
68,5 [2.70]
48
[1.89]
48
[1.89]
27 [1.06]
71 [2.79]
195 [7.68]
11 [0.43]
90,5 [3.56]
11 [0.43]
88,5 [3.48]
143,5 [5.65]
138 [5.43]
M4
Port
M1
R
A
G1
G2
M2
B
T2
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T1
S
A-B
G1/G2
M1/M2
M3/M4
R
S
T1/T2
ISO 1179-1
(standard)
Services
3/4’’ GAS
Auxiliary
1/4’’ GAS
A-B pressure
1/4’’ GAS
Servo control pilot
1/4’’ GAS
Servo pilot pressure 1/4’’ GAS
Suction
3/4’’ GAS
Drain
1/2’’ GAS
Function
ISO 11926-1
(option FU)
1 1/6-12-UNF
9/16-18-UNF
9/16-18-UNF
9/16-18-UNF
1 1/6-12-UNF
3/4-16-UNF
Options
M3
Controls
Port characteristics
7
8
POCLAIN HYDRAULICS
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POCLAIN HYDRAULICS
Model
Code
OPERATING PARAMETERS
Operating parameters
PM25-20
700
min-1(rpm)
Max. with load
3 600
250 [3 625]
Rated
System
pressure
Maximum
bar [PSI]
Mini continuous
Case
pressure
Continuous
Charge
pressure
Servo case
pressure
Mini (cold start)
bar (abs.)
[PSI abs.]
bar [PSI]
Maximum (cold start)
Standard version
Max. charge pressure
Maximum
370 [5 366]
10 [145]
Minimum low loop
Inlet
pressure
3 900
bar [PSI]
bar [PSI]
0,8 [11.6]
0,5 [7.2]
Technical
specifications
Minimum
Max. without load
PM25-28
1,5 [21.7]
2,5 [36.2]
10 [145] for control M; 22 [319] for other controls
30 [435]
30 [435]
Operating
Parameters
Speed
ratings
PM25-25
A charge flow is required to maintain a positive pressure in the low pressure loop of a closed loop hydrostatic transmission. Charge
pressure ensures proper lubrication and rotating group operation. It is recommended to maintain the charge pressure at a minimum of
10 bar [145 PSI] above case pressure. For more details, refer to charge pump paragraph, page 18.
Case pressure
System design
Parameters
Charge pressure
Case pressure must be maintained within the limits shown in the table ''Operating parameters''. Ensure housing is always filled with
hydraulic fluid and especially during start-up of the machine.
Features
Pressure ratings
Maximum peak pressure
It is the maximum allowable pressure. It is equivalent to the maximum setting of the maximum high pressure relief valve. A self-propelled
machine can reach the maximum peak pressure value no more than 1-2% of that work cycle.
Controls
Work cycle
A fundamental factor for ensuring correct hydrostatic transmission sizing is the machine work cycle (pressure-time ratio, seasonality,
pressure vs. percentage of time at max. displacement, machine type). Part service life depends on the correct choice in relation to the
work cycle.
Overloads
It is mandatory to protect parts against any possible overloads.
Speed ratings
Options
The table ''Operating parameters'' gives minimum and maximum rated speeds. Note that all displacements might operate under different
speed limits. Definitions of these speed limits appear below.
Maximum speed is the highest operating speed allowed. Over speeding reduces pump life time, can lead to loss of hydrostatic power and
braking capacity. Never exceed the maximum speed limit under any operating conditions.
Nominal speed is the speed offering the maximal efficiency.
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POCLAIN HYDRAULICS
Inlet pressure
Charge pump inlet pressure is key for acceptable pump life and performances. A continuous inlet pressure of not less than 0,8 bar abs.
[11.6 PSI abs.] is recommended. A continuous inlet pressure less than 0.5 bar abs. [7.2 PSI abs.] indicates inadequate inlet design or a
restricted filter. Pressures less than 0.5 bar abs. [7.2 PSI abs.] can happen at cold start, but should increase with oil temperature.
Theoretical output
Theoretical output flow is a function of pump displacement and speed. It is relevant to size the rest of the circuit. Theoretical flow does not take
into account losses due to leakage or variations in displacement. Refer to performances, page 6, for volumetric and overall efficiencies at
various operating speeds and pressures.
Poclain Hydraulics recommandations for fluid
Poclain hydraulics recommends the use of hydraulic fluids defined by the ISO 15380 and ISO 6743-4 standards.
For temperate climates, the following types are recommended.
• HM 46 or HM 68 for fixed installations.
• HV 46 or HV 68 for mobile installations.
• HEES 46 for mobile installations.
These specifications correspond to category 91H of the CETOP standard, parts 1, 2 and 3 of the DIN 51524 standard,
and grades VG32, VG 46 and VG68 of the ISO 6743-4 standards.
T
It is also possible to use ATF, HD, HFB, HFC or HFD type hydraulic fluid upon Poclain Hydraulics specific approval of the
components’ operating conditions.
Standardized designations for the fluids
• HM : Mineral fluids having specific antioxidant, anticorrosion and antiwear properties (HLP equivalent to DIN 51524
parts 1 and 2).
• HV :
HM mineral fluids providing improved temperature and viscosity properties (DIN 51524 part 3).
• HEES :Biodegradable fluids based on organic esters.
It is also possible to use a fluid that meets the biodegradability criteria and is compatible in the event of
accidental food contact. The BIOHYDRAN FG 46 fluid designed by the company Total has undergone testing of
its properties and performance on our test benches. Since this type of fluid has not yet been categorized, it is the
responsibility of machine manufacturers to validate its compatibility with all of the components used in order to
guarantee that the intended functions will be fulfilled and this for the desired life time of all equipment items.
For biodegradable fluids, consult your Poclain Hydraulics’ application engineer
During operation, the temperature of the oil must be between 0°C [32°F] and 80°C [176°F]; the minimum and
maximum temperatures may be exceeded momentarily by ± 20°C [± 68°F] for a duration of less than 30 minutes.
For all applications outside these limits, please consult with your Poclain Hydraulics’ application engineer.
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POCLAIN HYDRAULICS
The contaminating particles suspended in the hydraulic fluid cause the hydraulic mechanisms moving part wear. On hydraulic pumps,
these parts operate with very small dimensional tolerances. In order to reach the part life, it is recommended to use a filter that maintains
the hydraulic fluid contamination class at a max. of:
Model
Code
Fluid and filtration
9 according to NAS 1638
20/18/15 according to ISO 4406:1999
Making sure that this ratio does not worsen together with the increasing of the filter cartridge differential pressure.
If these values cannot be observed, the component life will consequently be reduced and it is recommended to contact the Poclain
Hydraulics Customer Service.
Filters on charge circuit
Filters on the charge circuit (F0-F2) are designed without by-pass. The max. pressure drop on the filtration part must not exceed 2 bar [29
PSI] (3 bar [43.5 PSI] in case of cold starting) at pump full rating. To monitor the pressure drop, It is recommended to use the clogging
indicator on the filtration element (F2 option). Contact your Poclain Hydraulics Application engineer, each time the pump is not charged by
its internal charge pump.
Filters on charge circuit are mounted on the pump special support.
Filters assembling
The suction filter is mounted on the suction line. Check that the pressure before the charge pump is 0.8 bar abs. [11.6 PSI abs.], measured
on the pump suction port (0.5 bar [7.2 PSI] for cold starting).
Operating
Parameters
ȕ 20 to 30 100
Technical
specifications
According to the type of application decided for the pump, it is necessary to use filtration elements with a filtration ratio of:
For both max. efficiency and life of the unit, the operative viscosity should be chosen within the optimum range of:
¥opt = optimum operating viscosity from 16 to 36 mm2/s [from 74.1 to 166.8 SUS] referred to the closed loop temperature.
Working conditions: the following limits of viscosity apply
¥min = 5 mm2/s [23 SUS] short-duration at a max. permissible leakage oil temperature of 90° C [194°F]
¥max = 1000 mm2/s [4 634 SUS] short-duration, on cold start.
System design
Parameters
Viscosity range
For brief instants during the cold starting
[SUS]
10
0
927
100
463
60
278
40
185
Optimum
viscosity
20
93
10
46
5
-40
-25
-10
0
10
30
50
70
90
23
115 °C
-40
-13
14
32
50
86
122
158
194
239
Controls
200
Features
7414
4634
2780
1854
[°F]
Options
68
VG 46
VG 32
VG
22
VG
1600
1000
600
400
V
G
For brief instants with leakage oil at 90°C
mm2/s
Hydraulic fluid temperature range
Ensure fluid temperature and viscosity limits
are concurrently satisfied.
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POCLAIN HYDRAULICS
SYSTEM DESIGN PARAMETERS
Consult your Poclain Hydraulics application engineer to validate your
design parameters before using the pump in your application.
Sizing equations
The following equations are helpful when sizing hydraulic pumps. Generally, the sizing process is initiated by an evaluation of the machine
system to determine the required motor speed and torque to perform the necessary work function. First, the motor is sized to transmit the
maximum required torque. The pump is then selected as a flow source to achieve the maximum motor speed.
SI units
Output flow Q
=
Input torque M
=
Input power P
=
Output flow Q
US units Input torque M
Input power P
=
=
=
Vg.n.Kv
(l/min)
1000
Vg.'p
(N.m)
20.S.Km
M. n.S
Q.'p
=
30 000
Vg=Displacement per revolution cm3/tr [in3/rev]
'p = po - pi (system pressure) bar [PSI]
(kW)
600.Kt
Vg.n.Kv
n = Speed min-1 [rpm]
Kv = Volumetric efficiency
Km = Mechanical efficiency
Kt = Overall efficiency (Kv.Km)
[GPM]
231
Vg.'p
[lbf.in]
2.S.Km
M.n.S
198 000
Q.'p
=
[hp]
1714.Kt
Redundant braking system requirement
Unintended vehicle or machine movement hazard.
The loss of hydrostatic drive line power, in any mode of operation (forward, neutral, or reverse)
may cause the system to lose hydrostatic braking capacity. You must provide a braking system,
redundant to the hydrostatic transmission, sufficient to stop and hold the vehicle or machine in
the event of hydrostatic drive power loss.
Loop flushing
Closed circuit may require a flushing valve to meet temperature and cleanliness requirements. A flushing valve takes a part of hot fluid flow from
the low pressure loop of the system loop for cooling and filtering. Make sure that the charge pump provides adequate flow for the flushing valve
flushing and the flushing valve does not cause charge pressure to drop below recommended limits..
M1 G1
G2 R M2
See option VS page 46
for more information
M3
M4
A
B
T1
12
T2
S
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POCLAIN HYDRAULICS
The reservoir provides clean fluid, dissipates heat, and removes entrained air from the hydraulic fluid. It allows for fluid volume changes
associated with fluid expansion and cylinder differential volumes. Minimum reservoir capacity depends on the volume needed to perform these
functions. Typically, a capacity of one half the charge pump flow (per minute) is satisfactory for a closed reservoir. Open circuit systems sharing a
common reservoir require greater fluid capacity.
Model
Code
Reservoir
Locate the reservoir outlet (suction line) near the bottom, allowing clearance for settling foreign particles. Use a 100 - 125 μm screen covering the
outlet port.
Technical
specifications
Place the reservoir inlet (return lines) below the lowest expected fluid level, as far away from the outlet as possible.
Use a baffle (or baffles) between the reservoir inlet and outlet ports to promote de-aeration and reduce fluid surging.
Case drain usage for tandem pump
G1-1 R-1 M2-1
A-1 M3-2M4-2
M1-2 G1-2
R-2 M2-2
A-2
M3-1
M4-1
T
B-1
S
B-2
System design
Parameters
G2-2
M1-1
Operating
Parameters
On tandem pumps, and to ensure lubrification of both pumps, excess flow from the second pump charge relief valve must be routed into the
housing of the first pump.
M1 G1
G2 R
M3
M4
Features
The differential pressure is the High pressure relief valve setting minus Charge relief valve setting.
Max. system
High pressure relief
= pressure
valve setting
M2
A
Controls
B
T2
S
Charge relief valve
setting
Options
T1
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POCLAIN HYDRAULICS
Bearing life and external shaft loading
Bearing life:
Bearing life is a function of speed, pressure , swashplate angle and external loads. Oil type and viscosity impact bearing life.
Bearing life (B10 hours)
12 900
PM25-28
Normal bearing life in B10 hours is shown in the above table. Figures have been calculated under the following operating conditions : a
continuous differential pressure of 130 bar [1 885 PSI], 1 800 rpm shaft speed, maximum displacement, without any external shaft side load.
The data is based on a 50% forward, 50% reverse duty cycle, standard charge pump size, and standard charge pressure.
Shaft Loads:
PM25 pumps are designed with bearings that can accept external radial and thrust loads. The external radial shaft load limits depend on the
load position, orientation, and operating conditions of the unit.
The maximum permissible radial load (Re), is based on the maximum external moment (Me), and the distance (L) from the mounting
flange to the load. It may be determined using the table and formula below. Thrust (axial) load limits are also shown.
Re = Me / L
All external shaft loads affect bearing life. In applications with external shaft loads, minimize the impact by positioning the load at 90° or 270° as
shown in the figure.
Contact your Poclain Hydraulics representative for an evaluation of unit bearing life if:
• Continuously applied external loads exceed 25 % of the maximum allowable radial load Re.
• The pump swashplate is positioned on one side of center all or most of the time.
• The unit bearing life (B10) is critical.
External moment (Me)
N.m [in.lbf]
Maximum shaft thrust in (Tin)
N [lbf]
44 [389]
1 000 [224.8]
PM25-28
at 120 bar [1 740 PSI] and 3 600 rpm
Radial and thrust load position
L
0° Re
90° Re
Axis of swashplate
rotation
End view of
shaft
270° Re
Re
Tout
Tin
180° Re
For an accurate calculation, consult your Poclain Hydraulics
application engineer.
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Hydraulic unit life is the life expectancy of the hydraulic components. It depends on speed and system pressure even if , system pressure
is the dominant operating variable. High pressure, generated by high load, reduces hydraulic unit life.
Model
Code
Hydraulic unit life
Design the hydraulic system according to the expected machine duty cycle. Take in consideration the expected percentages of time at
various loads and speeds. Ask your Poclain Hydraulics representative to calculate an appropriate pressure based your hydraulic system
design. If duty cycle data is not available, input power and pump displacement are used to calculate system pressure.
PM25 pumps will meet satisfactory life expectancy if applied within the parameters specified in this technical documentation. For more
detailed information on hydraulic unit life see Operating Parameters in page 9.
Mounting flange loads
Adding tandem mounted pumps, and/or tandem auxillary pump(s), subjecting pumps to shock loads may generate excessive loads on the
front mounting flange. The overhung load moment for multiple pump mounting can be estimated as shown in the figure bellow
Technical
specifications
All pressure limits are differential pressures (referenced to charge pressure) , taking a normal charge pressure in consideration.
CG
pump 1
Auxiliary pad
CG
pump 2
System design
Parameters
Mounting flange
Operating
Parameters
Overhung load example
L1
L2
Features
Estimating overhung load moments
W = Weight of pump (kg)
L = Distance from mounting flange to pump center of gravity (CG)
MR = GR (W1L1 + W2L2 + ... + WnLn)
MS = GS (W1L1 + W2L2 + ... + WnLn)
Rated load moment (N.m)
Shock load moment (N.m)
Rated (vibratory) acceleration (G’s) (m/sec²)
Maximum shock acceleration (G’s) (m/sec²)
Controls
Where:
MR =
MS =
GR*=
GS*=
*Calculations will be carried out by multiplying the gravity (g = 9.81 m/sec²) with a given factor. This factor depends on the application.
Rated moment (MR)
N.m [in.lbf]
Shock load moment (MS)
N.m [in.lbf]
PM25-20
370 [3 274]
600 [5 310]
PM25-25
370 [3 274]
600 [5 310]
PM25-28
370 [3 274]
600 [5 310]
Options
Allowable overhung load moment are shown in the above table. Exceeding these values requires additional pump support.
For an accurate calculation, consult your Poclain Hydraulics
application engineer.
23/09/2016
15
POCLAIN HYDRAULICS
FEATURES
High pressure relief valve
The high pressure relief valves maintain circuit pressure in the proper range. The check valves allow charge flow to replenish the low pressure
loop of the circuit. The high pressure relief valves ensure a high pressure protection of the high pressure loop of the circuit.
High pressure relief valves are available in a range of settings.
When high pressure relief valves are not desired, pumps is equipped with charge circuit check valves only.
High pressure relief valves are intended for transient overpressure protection and are not
intended for continuous pressure control. Flow over relief valves for extended periods of time
may result in severe heat build up. High flows over relief valves may result in pressure levels
exceeding the nominal valve setting and potential damage to system components.
1
2
3
4
5
6
7
8
9
10
11
P M 2 5
High pressure
relief valve
Without
Available setting
bar [PSI]
M1G1
-
00
150 [2 175]
15
200 [2 900]
20
250 [3 625]
25
300 [4 351]
30
350 [5 076]
35
G2 R M2
M3
M4
A
B
With
T1
T2
S
High pressure
relief valve
ISO VG46 hydraulic fluid at 50°C [122°F]
Pressure
bar
PSI
400
5 801
300
4 351
200
2 900
100
1 450
0
25
50
75
100
L/min
6.6
13.2
19.8
26.4
GPM
The high pressure relief valve setting is not the
differential pressure between A and B ports (see
page 13).
Flow
16
23/09/2016
POCLAIN HYDRAULICS
The charge pressure relief valve provides a relief outlet for charge circuit. This valve is used to set the charge pressure of the circuit. Flow
through the valve is ported to case.
Model
Code
Charge relief valve
The nominal charge relief setting is referenced to case pressure.
1
2
3
4
5
6
7
8
9
10
Technical
specifications
Incorrect charge pressure settings may result in the inability to build
required system pressure and/or inadequate loop flushing flows.
Ensure correct charge pressure under all conditions of operation to
maintain pump control performance.
11
Operating
Parameters
P M 2 5
Available setting
bar [PSI]
Without
M1G1
-
00
Only for control M
10 [145]
10
For all controls
22 [319]
20
G2 R M2
M3
M4
A
With
B
T1
T2
S
System design
Parameters
Charge relief
valve
Features
Charge relief
valve
ISO VG46 hydraulic fluid at 50°C [122°F]
435
25
362.6
20
290
15
217.5
10
145
5
72.5
0
500
1000
1500
2000
2500
Options
Pressure difference
30
Controls
PSI
bar
0
3000
Pump speed (rpm)
23/09/2016
17
POCLAIN HYDRAULICS
Charge pump
Charge flow is required on all PM25 pumps used in closed circuit installations. The charge pump provides flow to make up internal leakage,
maintain a positive pressure in the main circuit, provide flow for cooling and filtration, replace any leakage losses from external valving or
auxiliary systems, and to provide flow and pressure for the control system.
Many factors influence the charge flow requirements. These factors include system pressure, pump speed, pump swashplate angle, type of
fluid, temperature, size of heat exchanger, length and size of hydraulic lines, control response characteristics, auxiliary flow requirements,
hydrostatic motor type, etc.
Unusual application conditions may require a more detailed review of charge pump sizing. Charge pressure must be maintained at a specified
level under all operating conditions to prevent damage to the transmission. Poclain Hydraulics recommends testing under actual operating conditions to verify this.
M1G1
G2 R M2
M3
M4
A
B
T1
T2
S
Charge pump sizing/selection
In most applications a general guideline is that the charge pump displacement should be at least 20% of the main pump displacement.
1
2
3
4
5
6
7
8
9
11
10
P M 2 5
Displacement
cm³/rev [in³/rev]
Rated speed
rpm
-
-
00
For all auxiliary
mounting pads
9,1 [0.55]
3900
08
Only auxiliary
mounting pad A
12 [0.73]
3900
12
Charge pump
Without
With
Contact your Poclain Hydraulics application
engineer for more information.
18
23/09/2016
POCLAIN HYDRAULICS
PM25 are designed with mechanical displacement (stroke) limiters. You can limit maximum displacement of the pump to a certain percent of its maximum displacement to near zero in both direction.
Model
Code
Displacement limiters
Take care in adjusting displacement limiters to avoid an undesirable condition of output flow
or speed. Retorque the sealing lock nut after every adjustment to prevent an unexpected
change in output conditions and to prevent external leakage during pump operation.
PM25 with control M
PM25 with other controls
Max. displacement
adjustement
Max. displacement
adjustement
Neutral position
adjustement
Max. displacement
adjustement
System design
Parameters
Operating
Parameters
Max. displacement
adjustement
Technical
specifications
The displacement limiters are located on the both sides of the servo piston and are adjustable by screw.
Features
By-pass
PM25 features a by-pass function. By-passing Port A and Port B is achieved by unscrewing a screw located on the cover. The by-pass
connect the ports A-B and must be use only in emergency case and only for short movement.
M1G1
G2 R M2
M3
M4
Controls
A
B
T1
T2
S
Options
To avoid leakage, do NOT exceed two turns of the screw.
By-pass valve is intended for moving a machine for very short
distances at very slow speeds. It is NOT intended as tow valve.
23/09/2016
19
POCLAIN HYDRAULICS
Mounting flange and shafts
SAE B - Splined shaft
1
2
3
4
5
6
7
8
9
10
11
P M 2 5
S3 13 teeth
Max. torque: 220 Nm [1947 in.lbf]
10 [0.39]
Splined ANSI B92.1a-1996
Pitch 16/32” DP
Pressure angle 30°
Tolerance class: 5
M6
+0
Ø 101,6 -0.054
[dia. 4.00 +0
-0.002 ]
31
[1.22]
16 [0.63]
20 [0.79]
0
9.5 -0.05
41
[1.61]
S4 15 teeth
8 [0.31]
Pitch 16/32” DP
Pressure angle 30°
Tolerance class: 5
M6
+0
Ø 101,6 -0.054
[dia. 4.00 +0
]
-0.002
38
[1.50]
16 [0.63]
25 [0.98]
9.5
0
-0.05
46
[1.81]
20
23/09/2016
Options
Controls
6,35
[0.25
]
+0.000
Ø 22,22 -0.013
[dia. 0.87 +0.000
-0.0005 ]
23/09/2016
4
5
Ø = 22,22 mm [dia. 0.87 in]
4,5
[0.18]
6
8 [0.31]
33
[1.30]
Technical
specifications
3
19
[0.75]
Operating
Parameters
7
9.5
41
[1.61]
8
0
-0.05
9
10
11
Model
Code
C3
System design
Parameters
2
M8
1
25
[0.98]
Features
+0.000
-0.036
+0.000
-0.001
0
P M 2 5
25,08 -0.2
0
[0.99 -0.08
]
+0
Ø 101,6 -0.054
[dia. 4.00 +0
-0.002 ]
POCLAIN HYDRAULICS
SAE B - Key shaft
21
POCLAIN HYDRAULICS
SAE A flange
1
2
3
P M 2 5
4
5
6
7
8
9
10
11
A
00
Without charge pump
8
With charge pump: 9,1 cm3/rev [0.55 in3/rev]
12
With charge pump: 12,0 cm3/rev [0.73 in3/rev]
Max. Torque: 80 N.m [708 in.lbf]
Pitch 16/32” DP
Pressure angle 30°
9 teeth
Tolerance class: 5
33,5
[1.32]
8 [0.31]
35 [1.38]
201 [7.91]
Ø 82,55 +0.071
+0.036
[dia. 3.25 +0.003
+0.001 ]
4 x M10
Ø 106.37 [dia. 4.19]
130,4 [5.13]
20
[0.79]
Do not rotate the auxiliary mounting pad cover.
22
23/09/2016
POCLAIN HYDRAULICS
2
3
4
5
6
7
8
9
10
11
G
00
Without charge pump
08
With charge pump: 9,1cm3/rev [0.55 in3/rev]
Technical
specifications
1
P M 2 5
Model
Code
Max. torque: 48 N.m [425 in.lbf]
205 [8.07]
39 [1.53]
Features
Pitch 16/32” DP
Pressure angle 30°
9 teeth
Tolerance class: 5
18
[0.71]
Controls
8 x M10
115,4 [4.54]
System design
Parameters
]
+0.000
+0.001
Ø 52 +0.000
+0.030
[dia. 2.04
2,5 [0.10]
8 [0.31]
8 -0.025
-0.061
[0.31 -0.001
-0.002 ]
30
[1.18]
60 [2.36]
100,4 [3.95]
6,5 [0.25]
Operating
Parameters
60 [2.36]
14,5 [0.57]
Options
Do not rotate the auxiliary mounting pad cover.
23/09/2016
23
POCLAIN HYDRAULICS
Tandem pumps
Max. torque intermediate coupling
200 N.m [1 770 in.lbf]
Front axial
pump
Rear axial
pump
Next pump
Me1 for the first pump
Me imput torque
Me2 for the second pump
Me3 for the next pump
Torque required by auxiliary pumps is additive.
Ensure requirements don’t exceed shaft torque ratings.
Front axial
pump
+
Rear axial
pump
1
2
3
4
5
6
P M 2 5
P M 2 5
Number of charge pump
in the tandem
8
9
00
T
10
11
T1
Axial
pump
Front
0 charge pump
Rear
Front
1 charge pump*
Rear
Mounting flange
and shaft
Charge
pump
SAE B; 13 teeth
S3
SAE B; 15 teeth
S4
Shaft for
secondary
tandem pump
T1
SAE B; 13 teeth
S3
SAE B; 15 teeth
S4
Shaft for
secondary
tandem pump
T1
* The charge pump can only be located on the rear axial pump.
24
7
Auxiliary mounting
flange
Without
00
Tandem fitting
T
SAE A flange
A
Without
00
Without auxiliary
mounting pad
S
Without
00
Tandem fitting
T
08
SAE A flange
A
Without auxiliary
mounting pad
S
With
or
12
Ports T and G of the first pump must be
connected with ports T and G of the
second pump.
23/09/2016
POCLAIN HYDRAULICS
G1-1 R-1 M2-1
A-1 M3-2M4-2
M1-2 G1-2
R-2 M2-2
Model
Code
G2-2
M1-1
A-2
T
B-1
S
Technical
specifications
M3-1
M4-1
B-2
Gear pumps
1
2
3
4
5
6
7
8
9
10
11
Gear pump
08
G
11
B
14
C
17
20
04
SAE A flange
06
A
08
11
A
14
B
17
C
20
22
26
bar [PSI]
270
[3 915]
270
[3 915]
270
[3 915]
270
[3 915]
270
[3 915]
240
[3 480]
220
[3 190]
270
[3 915]
270
[3 915]
270
[3 915]
270
[3 915]
270
[3 915]
240
[3 480]
220
[3 190]
200
[2 900]
180
[2 610]
Max. peak
pressure
A
B
Mass
Efficiency
C
bar [PSI] mm [in] mm [in] mm [in] Kg [lb]
%
290
90,3
2,30
[4 205]
[3.55]
[5.07]
290
93,6
2,45
[4 205]
[3.68]
[5.40]
290
97,8
2,60
[4 205]
[3.85]
[5.73]
290
101,9
2,70
88
100
95*
[4 205]
[4.01] [3.46] [3.94] [5.95]
290
106,9
2,80
[4 205]
[4.21]
[6.17]
250
111,1
2,95
[3 625]
[4.37]
[6.51]
230
116,1
3,10
[3 335]
[4.57]
[6.84]
290
93,0
2,30
[4 205]
[3.66]
[5.07]
290
96,3
2,45
[4 205]
[3.68]
[5.40]
290
100,5
2,60
[4 205]
[3.96]
[5.73]
290
104,6
2,70
[4 205]
[4.12]
[5.95]
290
109,6 130,4
2,80
95
95*
[4 205]
[4.21] [5.13] [3.74] [6.17]
250
113,8
2,95
[3 625]
[4.37]
[6.51]
230
118,8
3,10
[3 335]
[4.68]
[6.84]
210
123.8
3,25
[3 045]
[4.87]
[7.17]
190
129,6
3,40
[2 755]
[5.10]
[7.50]
* Value collected during the testing at 1500 rpm
System design
Parameters
06
bar [PSI]
250
[3 625]
250
[3 625]
250
[3 625]
250
[3 625]
250
[3 625]
230
[3 335]
210
[3 045]
250
[3 625]
250
[3 625]
250
[3 625]
250
[3 625]
250
[3 625]
230
[3 335]
210
[3 045]
190
[2 755]
170
[2 465]
Dimension
Features
A
Max.
intermittent
pressure
Controls
04
German group 2
cm3/rev
[cu.in/rev]
4
[0.24]
6,0
[0.37]
8,5
[0.52]
11,0
[0.67]
14
[0.85]
16,5
[1.01]
19,5
[1.19]
4
[0.24]
6,0
[0.37]
8,5
[0.52]
11,0
[0.67]
14
[0.85]
16,5
[1.01]
19,5
[1.19]
22,5
[1.37]
26
[1.59]
Pressure
Continuous
max.
pressure
Options
Displacement
Operating
Parameters
P M 2 5
Gear pumps are always delivered flanged on the axial
pump. They can not be sold alone.
23/09/2016
25
POCLAIN HYDRAULICS
CONTROLS
1
2
3
P M 2 5
4
5
6
7
8
9
10
11
M
The variation in pump displacement is obtained by rotating the lever shaft in a clockwise or counter-clockwise direction.
The lever shaft is directly linked to the pump swashplate.
The angle is at 15° for 20,5 cm3/rev [1.25 in3/rev] displacement and at 18° for 25,7 cm3/rev [1.57 in3/rev].
M1G1
Flow rate determination
Rotation
Control
X
Clockwise (R)
Y
X
Counter clockwise (L)
Y
M3
M4
Output
A
B
B
A
Input
B
A
A
B
B
Control shaft torque at 3000 rpm
[in.lbf]
30
200 bar [2 900 PSI]
100 bar [1 450 PSI]
10
0
25
50
75
T2
S
100% displacement
cm3/rev [in3/rev]
20,5 [1.25]
25,7 [1.57]
28 [1.71]
Y
N.m
A
T1
X
20
G2 R M2
13,5°
17°
18,5°
Control shaft torque at 1500 rpm
N.m
265.5
30
177
20
88.5
10
0
100
X/Y angle
0
[in.lbf]
265.5
200 bar [2 900 PSI]
100 bar [1 450 PSI]
25
50
75
177
88.5
0
100
The spring return feature in the control unit is not a safety device.
26
23/09/2016
POCLAIN HYDRAULICS
System design
Parameters
See page 7 for other dimensions
and port characteristics.
Operating
Parameters
Technical
specifications
85 [3.35]
103 [4.05]
Ø 6 [dia. 0.24]
63 [2.48]
93,5 [3.68]
Ø 18 [dia. 0.71]
Model
Code
Dimensions
Options
Controls
Features
60,5
[2.38]
23/09/2016
27
POCLAIN HYDRAULICS
1
2
P M 2 5
3
4
5
6
7
8
9
10
11
A
The variation in pump displacement is obtained by rotating the drive lever situated on the servo control. An internal channel, linked to the charge
pump, feeds a hydraulic servo valve which supplies oil into the cylinder which is in turn linked to the pump swashplate.
The maximum rotation of the Iever, with respect to 0 is 42,5° for both rotation directions; thus permitting the optimum control of the
displacement.
At every lever angle there is a corresponding pump displacement.
On the (T) return ’’arm’’ of the rotating distributor a restrictor (Rs) is mounted which regulates the servo control shifting speed, thus avoiding
sudden accelerations and stoppages.
The effort of moving the lever is independent of the pressure and rpm.
Rotation
Control
X
Clockwise (R)
Y
X
Y
Output
A
B
B
A
Input
B
A
A
B
Rs
M1 G1
G2 R M2
M3
M4
A
B
T1
T2
S
To prevent damage to the control A a positive
mechanical stop must be provided for the
control A linkage.
N.m
[in.lbf]
26.5
2
17.7
1
8.85
0
0
-1
-8.85
-2
-17.7
5°
42,
3
ma
x.
42
,5°
Y
x.
ma
X
-3
-26.5
-40
-30
-20
-10
0
10
20
30
40
Control shaft rotation (degrees)
28
23/09/2016
POCLAIN HYDRAULICS
3 x Ø 9 [dia. 0.35]
Technical
specifications
Operating
Parameters
123,5 [4.86]
132,5 [5.21]
Restrictor
166 [6.53]
Model
Code
0
Ø 12 -0.05
0
[dia. 0.47 -0.002
]
3
[0.12]
26
[1.02]
Dimensions
50,5
[1.99]
45
[1.77]
15 [0.59]
48
[1.89]
Features
48
[1.89]
21,5
[0.85]
System design
Parameters
Options
Controls
90,5 [3.56]
23/09/2016
29
POCLAIN HYDRAULICS
1
2
P M 2 5
3
4
5
6
7
8
9
10
11
S
The variation in pump displacement is obtained by adjusting the pressure on the M3 and M4 servo control connections by means of a hydraulic
proportional joystick (containing pressure reduction valves).
The joystick supply can by obtained by taking pressure from the auxiliary pump (G connection).
The servo control response time can be adjusted by inserting a restrictor on the joystick supply line (from 0.6 to 1,2 mm [from 0.02 to 0.05 in] or
between the joystick and servo piston of the pump.
The servo control operation curve in both control directions goes from 6 to 15 bar [from 87 to 217 PSI]. The adjustment curve of the hydraulic
control system has to be wider (from 5 to 16 bar [from 72.5 to 232 PSI]).
Restrictors
Rotation
Pressure
M3
Clockwise (R)
M4
M3
M4
M1 G1
G2 R
M2
M3
M4
Output
B
A
A
B
A
Input
A
B
B
A
B
T1
S
T2
bar
[PSI]
20
290
15
217.5
10
145
5
72.5
0
100
50
Pump displacement (%)
30
23/09/2016
POCLAIN HYDRAULICS
91 [3.58]
91 [3.58]
Operating
Parameters
Technical
specifications
10
[0.39]
118 [4.65]
Restrictor
Model
Code
Dimensions
M4
Options
Controls
90,5 [3.56]
Features
48
[1.89]
48
[1.89]
System design
Parameters
M3
23/09/2016
31
POCLAIN HYDRAULICS
Electrical on-off servo control
Control with return spring
1
2
3
4
5
6
7
8
9
10
11
P M 2 5
The reaching of the maximum
displacement in a time defined by
the restrictors (Rs) which are
positioned between the
electrovalve and the (T) drain is
obtained by the continuous starting
of an ON-OFF electrovalve with an
open-circuit CETOP 3 connection.
t
a b
Rs
Rs
M1 G1
Supply
voltage
If the electro-valve motion is
stopped, the pump goes back to
“0” position thanks to the servo
control springs.
p
G2 R M2
M3
M4
Without
B00
12V
B12
24V
B24
A
B
T2
T1
The pump can be supplied either
without electrovalve (B00) or with
electrovalve (B12, B24 ).
S
EV2
EV1
Rs
Rs
M1 G1
G2 R M2
M3
M4
A
B
T2
T1
S
Control without return spring
1
2
3
4
5
6
7
8
9
10
11
P M 2 5
The variation in pump
displacement is obtained by the
energizing of an ON-OFF electrovalve with a closed center CETOP
3 connection.
t
Supply
voltage
The displacement reached is in
relation to the starting time of the
electro-valve and to the diameter
of the restrictors (Rs) which are
placed between the electrovalve
and the drain (T).
a b
Rs
M1 G1
G2 R M2
M3
M4
Without
C00
12V
C12
A
B
T2
T1
24V
p
Rs
C24
The pump can be supplied either
without electrovalve (C00) or with
electrovalve (C12, C24).
S
EV2
EV1
Rs
Rs
M1 G1
G2 R M2
M3
M4
The servo control is without
springs and the setting of the pump
at a certain displacement is
guaranteed by the closed center of
the electrovalve.
A
B
T1
Rotation
Control
EV1
Clockwise (R)
EV2
EV1
EV2
Pressure
A
B
A
B
Output
A
B
B
A
T2
S
Input
B
A
A
B
32
23/09/2016
POCLAIN HYDRAULICS
95 [3.74]
38,5 [1.51]
95 [3.74]
EV1
Restrictor
Model
Code
Dimensions
EV2
Technical
specifications
Operating
Parameters
164,4 [6.47]
95 [3.74]
175,5 [6.91]
Restrictor
M3
B00 and C00
EV2
Features
48
[1.89]
48
[1.89]
CETOP 3
System design
Parameters
EV1
M4
90,5 [3.56]
DIN 43650
Options
Controls
Type of connector:
23/09/2016
33
POCLAIN HYDRAULICS
Electrico-proportional servo control
1
2
3
4
5
6
7
8
9
10
11
P M 2 5
By means of a potentiometer and a control card, a voltage signal is applied to the proportional
electrovalve coils which adjust the pressure of the servo control connected to the pump swashplate.
Supply
voltage
At every position of the potentiometer lever, there is a corresponding swashplate position.
12V
P12
The flow rate direction depends on which coil is excited.
24V
P24
The adjustment speed can be controlled by ramps installed on the card and by restrictors (Rs)
positioned between the electrovalve and the servo control.
Rotation
Pressure
EP1
Clockwise (R)
EP2
EP1
EP2
Output
B
A
A
B
Input
A
B
B
A
EP2
EP1
Rs
Rs
G2 R
M1 G1
M2
M3
M4
A
B
1400
700
1200
600
1000
500
800
400
600
300
0
50
Pump displacement (%)
Current (mA) (24V)
The current must not exceed 1500 mA
under 12V and 800 mA under 24V.
S
T2
Current (mA) (12V)
T1
100
34
23/09/2016
POCLAIN HYDRAULICS
Model
Code
Dimensions
EP1
Restrictor
EP2
Operating
Parameters
165,5 [6.51]
Technical
specifications
Restrictor
43
[1.69]
M3
System design
Parameters
48
[1.89]
48
[1.89]
68 [2.68]
68,4 [2.69]
EP1
Features
EP2
M4
90,5 [3.56]
DIN 43650
Options
Controls
Type of connector:
23/09/2016
35
POCLAIN HYDRAULICS
Hydraulic automotive control
1
2
3
4
5
6
7
8
9
10
11
P M 2 5
In relation to the input rotation rate, the pump swashplate positioning cylinder is actuated by the pressure of the
adjustment valve and a 4/3 electro-hydraulic valve, progressively positioning the swashplate. This provides a
continuously variable pump displacement. The direction of the supplied flow is determined by which of the two
solenoids is energized.
The pilot pressure increases proportionally to the rotation plate. A pump displacement increase corresponds to
the higher pilot pressure.
In case the prime mover is overloaded, the rotation rate decreases and the pilot pressure is reduced causing a
pump displacement reduction with a corresponding drop in absorbed power.
An "Inching" lever (option IC) is available to reduce the pilot pressure independently of the pump rotation speed.
The hydraulic automotive control is also available with an hydraulic inching (HI). For that the port K must be
connected to a pressure reducer valve ( see page 42).
Rotation
Pressure
E1
Clockwise (R)
E2
E1
E2
Output
B
A
A
B
Input
A
B
B
A
M1 G1
G2 R
Supply
voltage
12V
D12
24V
D24
M2
D
IC
EV2
EV1
Rs
Rs
M3
M4
IC= Mechanical inching
A
B
T1
36
T2
S
23/09/2016
POCLAIN HYDRAULICS
134 [5.27]
38,5 [1.51]
Restrictor
Restrictor
95 [3.74]
EV1
EV2
Model
Code
Dimensions with option IC
Operating
Parameters
3
[0.12]
Technical
specifications
Port K
164,4 [6.47]
175,5 [6.91]
3 x Ø 9 [dia. 0.35]
45
[1.77]
15
[0.59]
Mechanical inching lever
M3
48
[1.89]
Features
94 [3.70]
48
[1.89]
71 [2.80]
EV1
System design
Parameters
84,75 [3.34]
15,25
[0.60]
EV2
M4
Options
Controls
90,5 [3.56]
23/09/2016
37
38
POCLAIN HYDRAULICS
23/09/2016
POCLAIN HYDRAULICS
Model
Code
OPTIONS
Roller bearing
1
2
3
4
5
6
7
8
9
10
11
P M 2 5
It is an optional high capacity bearing.
Depending on the characteristics of shaft load, the duty cycle of the application and the expected life time of your application, Roller
bearing might be needed.
Consult your Poclain Hydraulics Application Engineer.
Technical
specifications
CR
1
2
3
4
5
6
7
8
9
10
P M 2 5
11
EV
Standard NBR sealing are designed to resist to temperature up to 90°C [194°F] and to HV type oils.
If your application is outside these limits, Fluorinated elastomer seals might be recommended.
Operating
Parameters
UNF threads ports
2
3
4
5
6
7
8
9
10
M3
M4
M1
R
A
G1
G2
Port
A-B
G
M1/M2
M3/M4
S
T1/T2
Function
Services
Auxiliary
Gauge
Servo control pilot
Suction
Drain
ISO 11926-1
1 1/6-12-UNF
9/16-18-UNF
9/16-18-UNF
9/16-18-UNF
1 1/6-12-UNF
3/4-16-UNF
T1
Controls
B
T2
S
Options
M2
11
FU
Features
1
P M 2 5
System design
Parameters
Consult your Poclain Hydraulics Application Engineer.
23/09/2016
39
POCLAIN HYDRAULICS
Filter on pressure line
The PM25 pumps can have a pressure filter without clogging indicator
(F0) or with clogging indicator (F2). The flow thru the filter is only the
flow that entry in the close loop. The filter fitness is of 10 micron.
Maximum pressure difference between filter cartridge input and output
is 2 bar [29 PSI]. When reaching 2 bar [29 PSI], the cartridge has to be
changed.
The max. working pressure is 30 bar [435 PSI].
Tightening torque: 35 Nm [309 in.lbf].
1
2
3
4
5
6
7
8
9
10
11
P M 2 5
F0
F2
Without clogging indicator
With clogging indicator
M1 G1
G2
M2
NC
M1 G1
G2
M2
2 bar [29 PSI]
M3
M4
M3
M4
A
A
B
B
T1
T2
T1
S
T2
S
M1
G1
G2
M2
Clogging
indicator
94,5 [3.72]
M3
150 [5.90]
115,5 [4.55]
Ø 62
[dia. 2.44]
142 [5.59]
35 [1.38]
+
1
Thread of the clogging indicator is internally connected to ground.
M4
40
23/09/2016
POCLAIN HYDRAULICS
1
2
3
4
5
6
7
8
9
10
P M 2 5
Model
Code
11
F3
M2 C R G2
G1 M1
M5 M6
Rs2
G1
Rs1
M3
M4
A
G2
B
S
G1 = to filter on line
G2 = Return from filter on line
11 [0.43]
11 [0.43]
M2
T2
T1
Operating
Parameters
C
1
2
3
4
5
6
7
8
9
10
P M 2 5
Technical
specifications
R
11
LP
The function of the cut-off valve is to avoid that the pump absorbed power exceeds the machine engine power.
The cut-off valve is connected to A and B piston pump’s high pressure lines and is usually set at 20 to 30 bar [290 to 435 PSI] lower than
the maximum relief valve of the closed circuit.
The cut-off valve acts on the servo control operating pressure in order to reduce the pump displacement and the adsorbed power.
M1 G1
G2 R
M2
System design
Parameters
33 [1.30]
11,5 [0.45]
33 [1.30]
11,5 [0.45]
M1
M3
M4
Features
0.8
A
B
S
T2
X
R
Controls
T1
View X
G1
Options
113 [4.45]
M1
G2
M2
23/09/2016
Pressure cut-off
setting
41
POCLAIN HYDRAULICS
Mechanical inching
3
1
2
4
D12
5
6
7
8
9
10
or
P M 2 5
11
IC
D24
For hydraulic automotive control D. An "Inching" lever is available to reduce the pilot pressure independently of the pump rotation speed.
See Hydraulic automotive control (D) page 36.
Hydraulic inching
3
1
2
4
D12
5
6
7
8
9
10
or
P M 2 5
11
HI
D24
Towards hydraulic
joystick
G2 R C M2
M1 G1
D
From hydraulic
joystick
K
Rs2
61.5
[2.42]
Rs1
M3
M4
A
Rs1
R
BH
K
M1
B
G1
T2
49
[1.65]
T1
S
Port
K
Function
External servo pilot
ISO 1179-1
1/8’’ GAS
G2
C
T1
M2
For hydraulic automotive control D is available an hydraulic inching HI that consist in a connection K on the pump body to be connect with
a pressure reducer valve (for example brake pedal VB002 or VB012). See hydraulic automotive control (page 36).
42
23/09/2016
POCLAIN HYDRAULICS
1
2
3
4
5
6
7
8
9
10
Model
Code
Neutral position switch
11
MI
P M 2 5
Rs
M1 G1
G2 R
Technical
specifications
For the control A it is possible to obtain a micro switch to avoid the start of the engine if the lever of the control is not in center
(zero position).
M2
M3
M4
Operating
Parameters
A
B
T2
S
50,5
[1.99]
101 [3.98]
R
117,5 [4.62]
M1
Features
G1
System design
Parameters
T1
G2
M2
Options
Controls
Type of connector: Deutsch DT04-2P
23/09/2016
43
POCLAIN HYDRAULICS
Flushing valve
1
2
3
4
5
6
7
8
9
10
11
VS
P M 2 5
inside the pump cover, a purge valve can be fitted with discharge inside the pump casing by means of a calibrated hole. The exchange valve is
useful in case the temperature of the oil in the closed circuit is too high.
M1 G1
G2 R M2
M3
M4
A
B
T1
T2
S
X
R
112 [4.41]
M1
G1
G2
M2
Finishing coat
1
2
3
4
5
6
7
8
9
10
11
VS
P M 2 5
The pumps can be delivered with finishing coat when requested. Standard paint is RAL 9005 (black color).
Consult your Poclain Hydraulics application engineer for
other colors of topcoat.
44
23/09/2016
POCLAIN HYDRAULICS
1
2
3
4
5
6
7
8
9
10
11
DP
P M 2 5
Model
Code
It is possible to provide our products with dedicated plate (your part number engraved on the plate) when requested.
Technical
specifications
This option is available only for minimum volume of 50
pieces.
Consult your Poclain Hydraulics application engineer for
other possibilities.
2
3
4
5
6
7
8
9
10
11
SD
SD option consists of a block valve (same body as automotive valve) which provide a pressure signal for the servo piston of the pump
related to the speed of engine. In case of engine overload and consequent rpm reduction the SD valve reduces the pressure for the servo
piston and the pump de-stroke consequentially with an anti-stall effect.
Options
Controls
Features
For application of this option please contact
your Poclain Hydraulics application engineer.
System design
Parameters
1
P M 2 5
Operating
Parameters
Anti-stall valve
23/09/2016
45
46
POCLAIN HYDRAULICS
23/09/2016
Options
Controls
Features
System design
Parameters
Operating
Parameters
Technical
specifications
Model
Code
POCLAIN HYDRAULICS
23/09/2016
47
Poclain Hydraulics reserves the right to make any modifications it deems necessary to the products described in this document
without prior notification.The information contained in this document must be confirmed by Poclain Hydraulics before any order is
submitted.
Illustrations are not binding.
The Poclain Hydraulics brand is the property of Poclain Hydraulics S.A.
23/09/2016
A35767C
www.poclain-hydraulics.com

PM25 pump.book - Poclain Hydraulics

Transcription

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