Theoretical analysis of gas dissolution in high-speed and heavy-load hydraulic systems
HAN Heyong1,QIN Lixia1,LIU Yuan1,MA Lifeng1,LI Yongxiang2
1.Mechanical Engineering, Taiyuan University of Science and Technology, Taiyuan 030024, China;
2.Shanxi Yingde Hydraulic Co., Ltd., Taiyuan 030024, China
Abstract：In order to explore the cavitation phenomenon on the surface of a hydraulic cylinder and the instability of a hydraulic system caused by air bubbles entering into the hydraulic cylinder through pipelines after the cavitation at valve mouth, an effective volume modulus of hydraulic oil was taken as a bridge and a mathematical model was established to analyse the relationship between the initial air content at valve mouth and the distance of air bubbles movement.The travel length of the bubble movement in the channel was obtained according to the initial gas content after the gas passing through different hydraulic valve ports.The simulation was verified by using the software Fluent.The results show that as the initial gas content changes, the distance of gas dissolution in the pores also changes.It is found that the error caused by the mathematical model and the simulation model is less than 10%.The study of this model is helpful to prevent more air bubbles from entering the hydraulic cylinder after cavitation, and is benefitial to avoid causing cavitation in the hydraulic cylinder and breaking of the sealing device.It is more conducive to improve the stability of the hydraulic system.
韩贺永1，秦丽霞1，柳渊1，马立峰1，李永祥2. 高速重载液压系统气体溶解理论分析[J]. 振动与冲击, 2021, 40(2): 199-203.
HAN Heyong1,QIN Lixia1,LIU Yuan1,MA Lifeng1,LI Yongxiang2. Theoretical analysis of gas dissolution in high-speed and heavy-load hydraulic systems. JOURNAL OF VIBRATION AND SHOCK, 2021, 40(2): 199-203.
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