Numerical Optimization Of A Distributor Valve
Author(s)
L. Dahlén & P. Carlsson
Abstract
In this paper, a non-linear optimization method is used to improve the design of a
distributor valve. The distributor valve is an important component in a radial
piston hydraulic motor, and optimization of the design to minimize power losses
is an interesting way to increase efficiency. The main function of a distributor
valve is to supply the pistons with a pressurized flow and to return oil during
rotation. At the same time the distributor valve acts as an externally pressurized
lubricated thrust bearing, in order to separate the rotating parts from the motor
case. The bearing acts as a hydrostatic annular multi-recess plane thrust bearing,
with different recess pressures. The separating force of the bearing is balanced
hydrostatically by the pressure that is applied and springs. Losses will occur in
the contact between the parts in the distributor valve, due to friction and leakage.
This paper shows that modern optimization methods can be used as an effective
tool to create new designs and to modify the existing design of the bearing
surface geometry of the distributor. A finite element method has been used to
simulate the contact, and the program is linked to an optimization routine to
perform the optimization. The results of the optimized design show a significant
decrease in power loss, compared to the existing design in the operating range.
Keywords: radial piston hydraulic motor, simulations, optimization, power loss.
1 Introduction
Hydraulic pumps and motors are expected to work under a wide range of
operating conditions, and finding the optimum design of components can be
difficult. When optimizing a hydraulic machine for maximum efficiency, an
accurate model of the physical behaviour governing flow and torque losses is
Keywords
radial piston hydraulic motor, simulations, optimization, power loss.
Related Book
Other papers in this volume
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