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Estimate of minor pressure drop in flow channel of high pressure multiway valve |
(1.School of Mechanical Engineering and Automation, Fuzhou University, Fuzhou, Fujian 350108, China; 2.Lonking (Fujian) Excavator Co. Ltd., Longyan, Fujian 364028, China) |
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Abstract To solve the problems, such as large pressure drop and high energyconsuming in the flow channels in the multiway valve which centralizes control on multiactuator, and the motor for right travel is not sensitive enough etc, the hydraulic oil flow in the channel of the valve was analyzed and the effect of the channel structure on the minor pressure drop was clarified. In doing so, the geometry model of the right travel link of the multiway valve in an excavator was built by using Pro/E and the turbulent flow in the model was simulated by means of CFD SIMPLEC techniques. The results showed that in addition to the pressure drop in both the main valve port and the conduit between the inlet and the check valve, there is a significant pressure drop in the passage between the check valve port and the outlet. The pressure drop is proportional to the axial length of the passage; however, it is less affected by the angle of the passage. The drop is inversely proportional to the eddy scale and the number of vortex cores. The pressure drop in the multiway valve is measured as well, and the predicted drop is consistent with the experimental observations, suggesting the findings based on the analyzed results are reliable.
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Received: 24 September 2012
Published: 31 May 2013
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