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.

Keywords

direct drive rotary valve / computational fluid dynamics (CFD) / flow regulation

References

[1] Yang Y, Peng W, Meng D, . Reliability analysis of direct drive electrohydraulic servo valves based on a wear degradation process and individual differences. Proceedings of the Institution of Mechanical Engineers, Part O: Journal of Risk and Reliability, 2014, 228(6): 621–630

[2] Cui J,Ding F, Li Q, et al. High-pressure bi-directional rotary proportional solenoid for rotary servo valve. Chinese Journal of Mechanical Engineering, 2008, 44(09): 230–235 doi:10.3901/JME.2008.09.230

[3] Yu J, Zhuang J, Yu D. Modeling and analysis of a rotary direct drive servovalve. Chinese Journal of Mechanical Engineering, 2014, 27(5): 1064–1074 doi:10.3901/CJME.2014.0725.127

[4] Tu H C, Rannow M B, Wang M, . Design, modeling, and validation of a high-speed rotary pulse-width-modulation on/off hydraulic valve. Journal of Dynamic Systems, Measurement, and Control, 2012, 134(6): 061002 doi:10.1115/1.4006621

[5] Brown T L, Atluri P, Schmiedeler J P. Design of high speed rotary valves for pneumatic applications. Journal of Mechanical Design, 2013, 136(1): 015001 doi:10.1115/1.4025487

[6] Li D, Wu H, Gao J. Experimental study on stepless capacity regulation for reciprocating compressor based on novel rotary control valve. International Journal of Refrigeration, 2013, 36(6): 1701–1715 doi:10.1016/j.ijrefrig.2013.04.002

[7] Pan M, Johnston N, Robertson J, . Experimental investigation of a switched inertance hydraulic system with a high-speed rotary valve. Journal of Dynamic Systems, Measurement, and Control, 2015, 137(12): 121003

[8] Wang H, Gong G, Zhou H, . Steady flow torques in a servo motor operated rotary directional control valve. Energy Conversion and Management, 2016, 112: 1–10 doi:10.1016/j.enconman.2015.11.054

[9] Tan Q, Pan S, Feng Q, . Fluid-structure interaction model of dynamic behavior of the discharge valve in a rotary compressor. Proceedings of the Institution of Mechanical Engineers, Part E: Journal of Process Mechanical Engineering, 2015, 229(4): 280–289 doi:10.1177/0954408914530122

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)).

RIGHTS & PERMISSIONS

2016 Higher Education Press and Springer-Verlag Berlin Heidelberg