An in-line axial-piston swash-plate pump with pressure compensator is widely used for its fast speed of response and power economy. Although several simulation based design approaches exist to minimize issues like fluid-born noises, ample scope exists for more exhaustive design analysis. The most popular pressure compensator for a variable displacement pump with a spool valve actuating the control and bias cylinders has been taken up here. With an existing comprehensive flow dynamics model, an updated model for swiveling dynamics has been coupled. The dynamics also includes the force containment and friction effects on the swash plate. A design optimization has been accomplished for the pressure compensator. The target of the optimal design has been set as minimizing the transient oscillations of the swash plate, the compensator spool, pressures in the bias and control cylinders along with avoidance of both over-pressurization and cavitation in the bias cylinder. It has been found that the orifice diameters in the spring-side and at the metering port of the spool valve and in the backside of the bias cylinder have critical role in arriving at an optimum design. The study has led to a useful design procedure for a pressure compensated variable displacement pump.

References

References
1.
Norhirni
,
M. Z.
,
Hamdi
,
M.
, and
Nurmaya Musa
,
S.
,
2011
, “
Load and Stress Analysis for the Swash Plate of an Axial Piston Pump/Motor
,”
ASME J. Dyn. Syst., Meas., Control
,
133
, p.
064505
.10.1115/1.4004578
2.
Achten
,
P.
,
van den Brink
,
T.
, and
Schellekens
,
M.
,
2005
, “
Design of Variable-Displacement Floating Cup Pump
,”
The Ninth Scandinavian Conference on Fluid Power
, SCIFP’05, June 1–3, Linkoping, Sweden.
3.
Cho
,
S.H.
, and
Burton
,
R.
,
2011
, “
Position Control of High Performance Hydrostatic Actuation System Using a Simple Adaptive Control (SAC) Method
,”
Mechatronics
,
21
, pp.
109
115
.10.1016/j.mechatronics.2010.09.003
4.
Zaki
,
H.
, and
Baz
,
A.
,
1979
, “
On the Dynamics of Axial Piston Pumps
,”
J. Fluid. Q.
,
11
, pp.
73
87
.
5.
Baz
,
A.
,
1983
, “
Optimization of the Dynamics of Pressure-Compensated Axial Piston Pumps
,”
J. Fluid Control
,
15
, pp.
64
81
.
6.
Akers
,
A.
, and
Lin
,
S. J.
,
1988
, “
Optimal Control Theory Applied to a Pump With Single-Stage Electrohydraulic Servovalve
,”
ASME J. Dyn. Syst., Meas., Control
,
110
, pp.
120
125
.10.1115/1.3152661
7.
Zeiger
,
G.
, and
Akers
,
A.
,
1985
, “
Torque on the Swash Plate of an Axial Piston Pump
,”
ASME J. Dyn. Syst., Meas., Control
,
107
, pp.
220
226
.10.1115/1.3140724
8.
Schoenau
,
G. J.
,
Burton
,
R. T.
, and
Kavanagh
,
G. P.
,
1990
, “
Dynamic Analysis of a Variable Displacement Pump
,”
ASME J. Dyn. Syst., Meas., Control
,
112
, pp.
122
132
.10.1115/1.2894129
9.
Manring
,
N. D.
,
2001
, “
Designing a Control and Containment Device for Cradle-Mounted, Transverse-Actuated Swash Plates
,”
ASME J. Mech. Des.
,
123
, pp.
447
455
.10.1115/1.1371775
10.
Manring
,
N. D.
,
2002
, “
Designing a Control and Containment Device for Cradle-Mounted, Axial-Actuated Swash Plates
,”
ASME J. Mech. Des.
,
124
, pp.
456
464
.10.1115/1.1481361
11.
Manring
,
N. D.
, and
Mehta
,
V. S.
,
2011
, “
Physical Limitations for the Bandwidth Frequency of a Pressure Controlled Axial-Piston Pump
,”
ASME J. Dyn. Syst., Meas., Control
,
133
, p.
061005
.10.1115/1.4004056
12.
Bandopadhyay
,
P.
,
Bhattacharyya
,
A.
, and
Sanyal
,
D.
,
2004
, “
Modeling and Design of a Pressure Compensator for a Variable-Displacement In-Line Axial-Piston Pump With Compound Swashing Angle
,”
31st National Conference on Fluid Mechanics and Fluid Power
, Jadavpur University, pp.
941
948
.
13.
Mandal
,
N. P.
,
Saha
,
R.
, and
Sanyal
,
D.
,
2008
, “
Theoretical Simulation of Ripples for different Leading-Side Groove Volumes on Manifolds in Fixed-Displacement Axial-Piston Pump
,”
Proc. Inst. Mech. Eng., Part I
,
222
, pp.
557
570
.10.1243/09596518JSCE580
14.
Mandal
,
N. P.
,
Saha
,
R.
, and
Sanyal
,
D.
,
2012
, “
Effects of Flow Inertia Modelling and Valve Plate Geometry on Swash Plate Axial Piston Pump Performance
,”
Proc. Inst. Mech. Eng., Part I Part I
,
226
, pp.
451
465
.10.1177/0959651811426508
15.
Ivantysyn
,
J.
, and
Ivantysynova
,
M.
,
2001
,
Hydrostatics Pumps and Motors
,
1st ed.
,
Akademia Books International
,
New Delhi, India
, pp.
132
133
.
16.
Merritt
,
H. E.
,
1967
,
Hydraulic Control Systems
,
John Wiley & Sons, Inc.
, New York, pp.
94
98
.
17.
Manring
,
N. D.
,
2005
,
Hydraulic Control Systems
,
John Wiley & Sons, Inc.
, New York, pp.
173
176
.
18.
Nie
,
S. L.
,
Huang
,
G. H.
, and
Li
,
Y. P.
,
2006
, “
Tribological Study on Hydrostatic Slipper Bearing With Annular Orifice Damper for Water Hydraulic Axial Piston Motor
,”
Tribol. Int.
,
39
, pp.
1342
1354
.10.1016/j.triboint.2005.10.007
19.
Wang
,
S.
,
2013
, “
Novel Piston Pressure Carryover for Dynamic Analysis and Designs of the Axial Piston Pump
,”
ASME J. Dyn. Syst., Meas., Control
,
135
, p.
024504
.10.1115/1.4023065
20.
Bergada
,
J. M.
,
Watton
,
J.
,
Haynes
,
J. M.
, and
Davies
,
D. L.
,
2010
, “
The Hydrostatic/Hydrodynamic Behaviour of an Axial Piston Pump Slipper With Multiple Lands
,”
Meccanica
,
45
, pp.
585
602
.10.1007/s11012-009-9277-0
21.
Deb
,
K.
,
2006
,
Optimization for Engineering Design
,
1st ed.
,
Prentice-Hall of India Private Limited
,
New Delhi, India
, p.
153
.
22.
Li
,
Z.
,
2005
, “
Condition Monitoring of Axial Piston Pump
,” M. S. thesis, Department of Mechanical Engineering, University of Saskatchewan, Saskatoon, Saskatchewan, Canada.
23.
Kavanagh
,
G. P.
,
1987
, “
The Dynamic Modelling of an Axial Piston Hydraulic Pump
,” M. S. thesis, Department of Mechanical Engineering, University of Saskatchewan, Saskatoon, Saskatchewan, Canada.
24.
Wu
,
D.
,
2003
, “
Modeling and Experimental Evaluation of a Load-Sensing and Pressure Compensated Hydraulic System
,” Ph.D. thesis, Department of Mechanical Engineering, University of Saskatchewan, Saskatoon, Saskatchewan, Canada.
You do not currently have access to this content.