Design and analysis of a new high frequency double-servo direct drive rotary valve

Abstract

Researchers have investigated direct drive valve for many years to solve problems, such as fluid force imbalance and switching frequency. The structure of the rotary valve has received considerable research interest because of its favorable dynamic properties and simple structure. This paper studied the high frequency double-servo direct drive rotary valve (DDRV), and proposed a novel structure and drive method satisfying high reversing frequency and adequate quantity of flow. Servo motors are integrated into the valve by the innovative structure, which is designed to equilibrate the unbalanced radial fluid force with the symmetric distributed oil ports. Aside from the fast reversing function of the valve, the DDRV presented high performance in linearity of the flow quantity and valve opening as a result of the fan-shaped flow ports. In addition, a computational fluid dynamics (CFD) method based on Fluent was conducted to verify the flux regulation effect of the height change of the adjustable boss.

Key words： direct drive rotary valve; computational fluid dynamics (CFD); flow regulation

Acknowledgements

This work was supported by the National Natural Science Foundation of China (Grant No. 51305333), the Major National Science and Technology Project of China (Grant No. 2012ZX04004021) and Science and Technology Plan Project of Xi’an City (Grant No. CXY1514 (8)).

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