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Variable displacement axial piston pumps
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Variable displacement axial-piston pumps in swashplate design are
intended for hydraulic actuators combined of pump and motor,
operating in closed circuit systems. Operate in stroke of mobile
machines – harvesters, concrete mixers, paving compactors and other.
APV axial-piston pumps are easily controlled and relatively
compact. Pump flow is directly proportional to the cylinder block
speed and displacement varied with the swashplate positioning.
Flow direction is reversed with a tilt of the swashplate in
either of the opposite directions from its neutral position.
Modular control valve assembling provides flexibility of control
combinations.
MH – hydromechanical proportional control system. Due to the
control system the swashplate is held in the required position, thus
maintaining amount of the flow at the preset level.
ER 1 & ER 2 – electrohydraulic relay 3 positioned control
sestem. Used for drive operating to the system turn on – turn off –
turn on.
HD – hydraulic proportional control system. The swashplate is
held in the required position, due to the hydraulic indicators. Used
in
The design provides a possibility of making tandem
combinations.
When the control handle is released, the swashplate returns to
its initial position, and the flow to its zero.
Complete assembling and dismantling require just a standard set
of hand tools.
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Functional dependences
Efficiency, Flow and Input Power vs.
Speed
(at Maximum Swashplate Angle) |
 |
Drain Leakage vs.
Speed
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Control System
Due to the servo
control, with a small movement of the control
handle the
swashplate tilts through an angular rotation of ±18°.
With
the control handle held in any position, pump
displacement
varies within predeterminedlimits.
|
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| Control valve with orifices |
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Response Time
The time
required for reversing flow direction is a
function of the
orifice size in the control valve.
|
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Mounting
dimensions
Technical specifications
|
Displacement
Code |
33 |
71 |
90 |
112 |
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Displacement per Revolution
Max. |
cm3 |
33,3 |
69,8 |
89 |
110,8 |
|
Maximum Flow |
l/min |
113,5 |
186,3 |
218,9 |
272,6 |
|
Charge Pump Displacement |
cm3 |
12,3 |
18,06 |
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Maximum Pressure in High Pressure
Line |
MPa |
35,7 |
35,8 |
36,3 |
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Rated Pressure in High Pressure
Line |
MPa |
22,5 |
26,5 |
26,9 |
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Maximum Pressure in Control
Line |
MPa |
3,5 |
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Charge Pump Pressure |
MPa |
1,2 –
2,2 |
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Maximum Case Pressure |
MPa |
0,25 |
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Maximum Speed |
min-1 |
3590 |
2810 |
2590 |
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Minimum Speed |
min-1 |
500 |
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Rated Speed |
min-1 |
1500 |
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Maximum Swashplate Angle. |
Degr |
±18 |
|
Weight (without fluid) |
kg
|
45 |
63 |
78 |
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Rated Power |
kW
|
18,7 |
39,3 |
63,3 |
78,7 |
Shaft options
|
Code
А |
Code
В |
Code
С |
 |
 |
 |
|
Code
D |
Code
Е |
|
 |
 |
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Mounting Dimensions for Tandem
Combinations with Gear Pumps
|
Code
|
Z |
Dimensions
[mm] |
|
Da |
M |
D |
b |
D1 |
D2 |
D3 |
L1 |
D4 |
L2 |
|
1 |
9 |
12,926+0,11 |
- |
- |
- |
Ø82,57+0,04 |
Ø91+0,22 |
Ø106,4 |
7,5 |
M10-7H |
15min |
|
2 |
11 |
16,017+0,11 |
|
3 |
13 |
19,133+0,11 |
Ø101,62+0,04 |
Ø110+0,22 |
Ø146,1 |
10 |
M12-7H |
25min |
|
4 |
- |
- |
D-6×13×16H9×3,5D10 |
Ø13+0,11 |
3, 5 |
Ø82,57+0,04 |
Ø91+0,22 |
Ø106,4 |
7,5 |
M10-7H |
15min |
|
5 |
D-6×18×22H9×5D9 |
Ø18+0,11 |
5 |
Ø101,62+0,04 |
Ø110+0,22 |
Ø146,1 |
10 |
M12-7H |
25min |
|
6 |
13 |
19,133+0,11 |
- |
- |
- |
Ø50,52+0,046 |
Ø55,5+0,19 |
7,5 |
|
7 |
- |
- |
D-6×18×22H9×5D9 |
Ø18+0,11 |
5
|
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