Theoretical and Simulative Study on Hydraulic Bridge of Water Hydraulic Servo Valve

Xin Hua Wang; Jia Qing Chang; Shu Wen Sun; Gang Zheng

doi:10.4028/www.scientific.net/AMR.181-182.305

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 181-182Theoretical and Simulative Study on Hydraulic...

Theoretical and Simulative Study on Hydraulic Bridge of Water Hydraulic Servo Valve

Abstract:

An analysis has been conducted on the hydraulic bridge of the water hydraulic servo valve with annular clearance between sleeve and spool land as its first hydraulic resistance. Through some formula deductions, the simplified hydraulic bridge is drawn and the relationship between flapper displacement and differential pressure of spool ends, which is demonstrated by the subsequent simulation works, is extracted. By the CFD(computational fluid dynamics) simulation, firstly, the pressure distributions of the flapper face and the fore end face of the nozzle are obtained. Results show that the flapper has an annular area where the existing pressure is negative. Secondly, the relationship between flapper displacement and flow force acting on flapper is also acquired, which is much beneficial to the steady-state and dynamic analysis of the water hydraulic servo valve.

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Advanced Materials Science and Technology, ICMST 2010

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Periodical:

Advanced Materials Research (Volumes 181-182)

Pages:

305-309

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.181-182.305

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Online since:

January 2011

Authors:

Xin Hua Wang, Jia Qing Chang, Shu Wen Sun, Gang Zheng

Keywords:

Annular Clearance, Computational Fluid Dynamics (CFD), Flapper Displacement, Hydraulic Bridge, Pressure Distribution

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