A Study on simulationX® - based simulation technique to the design of valve plate and pressure pulsation characteristic according to precompression sections for swash plate type piston pump

Among the automation systems, hydraulic system which uses hydraulic fluid and conveys power, has a high density of power and facilitates a close control of load motion using a hydraulic actuator. Also, this hydraulic system has a quick response characteristic due to incompressibility. The swash plate type and bent axis type piston pumps which convert a rotary movement of a rotation axis into a reciprocating motion. In this paper, we deal with a variable swash plate type of piston pump and its basic structure is shown in Fig. 1. For safe operation of automated hydraulic equipment, hydraulic fluid should maintain smooth pressure increase and decrease in order to reduce this pulsation, but this pulsation highly varies depending on the shapes of the valve plate notch and an accurately designed valve plate can decrease pulsation and relieve a surge power in the pump. For such reasons, the shape of the valve plate notch or the design of valve plate itself is extremely important. So we analyze the effects of pressure and flow pulsation depending on the design factors, using a hydraulic analysis program, SimulationX® (Germany). Finally we will show the effectiveness of our proposed design of pre-compression sections on a valve plate in terms of low pulsation by using the hydraulic analysis program, SimulationX®.