The Analysis Of Performance On The Multi-way Valve (Walking Right Part) By Means Of CFD

Integral multi-way valve is the key hydraulic component to a large and medium-sized hydraulic excavator. The flow direction and flux of the inner oil is used to control the hydraulic circuit of a excavator’s hydraulic system. It is very important to the control like start, speed regulation, direction regulation and sequence of action regulation of each implementing agency. Pressure loss, vortex and shock vibration, which concern researchers a lot, often happen in a integral multi-way vale, and they are highly related to the overall peformace of a system.In order to solve problems like high pressure drop, great energy consumption and low sensitivity of the right-travel-motor, we chose the fluid domain between oil inlet (P) and outlet (B) on the right-travel-part of a integral multi-way as our research abject, and it’s simulation model was cereated by Pro/E. We dealt with the 3D flow field model using turbulent theory and SIMPLEC algorithm based on computational fluid dynamics method. In this paper, he effect of the structure parameters of public passage between the two working oil port and check valve on loss of pressure, vibration impact and the vortex phenomenon were analyzed systematically through theoretical analysis, numerical simulation and experimental verification, and the problem of how to eliminate eddy current phenomenon, shock and vibration of right-travel-part’s blind hole were studied in more detail, and the different forms of the main valve effecting the influence of the flow pressure loss near the flow channel of main valve port was discussed. Combined with structure parameters’ geometric constraints of the public passage between the two working oil port and check valve, manufacturing parameters matching table of the runner was obtained by using mathematical calculation method. This provides some reference to the performance optimization of a flow channel. At last, we tested a group of public passage’s structure parameters between the two working oil port and check valve and a form of main valve port which effect the pressure loss, and the results verified the reliability of our conclusions.The innovation of this paper is:compared to the previous researches which fluid domain of valve port or local flow channel were analyzed separately, our study is good to ensure the integrity of analysis and the accuracy of conclusions though calculating the integral multi-way of the right-travel-part’s inner channel. By comparing every pressure loss position we found that, the hydraulic valve, especially with many complex flow channelhad a larger pressure loss near the valve spool valve port, and pressure loss of local complex channel which have obvious throttling phenomena was much great too. Meanwhile, pressure loss, vibration impact, internal eddy scale and intensity of the right-travel-part were reduced effectively. And presented a flow manufacturing parameters matching table on the right-travel-part public passage between the two working oil port and check valve. The results of this study provides a theoretical basis for optimal design of multi-way valve.