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

被引：0
|
作者：
Wang Xinhua [1 ]
Chang Jiaqing [1 ]
Sun Shuwen [1 ]
Zheng Gang [1 ]
机构：
[1] Beijing Univ Technol, Coll Mech Engn & Appl Elect Technol, Beijing 100124, Peoples R China
来源：
ADVANCED MATERIALS SCIENCE AND TECHNOLOGY, PTS 1-2 | 2011年 / 181-182卷
关键词：
Hydraulic bridge; Annular clearance; Flapper displacement; Pressure distribution; CFD;
D O I：
10.4028/www.scientific.net/AMR.181-182.305
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
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.
引用
收藏
页码：305 / 309
页数：5
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