空化与非空化下高速开关阀阀芯液压力特性研究
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中图分类号：TH173 DOI：10.3969/j.issn.1004-132X.2026.02.004 开放科学（资源服务）标识码（OSID）：
Abstract：Aiming at the influences of different parameters on the hydraulic pressure of high-speed switching valves，the transient numerical simulation of the flow field in the valve was carried out by using computational fluid dynamics（CFD）technology. Under non-cavitation and cavitation conditions，the effects of pressure diference，back pressure and temperature on the hydraulic pressure of the valve cores were investigated respectively，and the cavitation flow field characteristicsand the evolution of the hydraulic pressure of the valve cores under diffrent opening degrees were revealed. The working conditions with severe cavitation Were selected to explore the correlation between cavitation fluctuation and hydraulic pressure oscilation. The results show that with the increase of opening degree，the hydraulic pressure on the spool decreases. With the increase of pressure difference，the pressure drops of valve cores under noncavitation conditions are much larger than that under cavitation conditions，especially under 6MPa and 10 MPa pressure diference. The increase of back pressure restrains the occurrence of cavitation to a certain extent，which makes the liquid pressure during cavitation decrease approximately linearly，but almost does not affect the liquid pressure under non-cavitation. The increase of temperature makes cavitation more likely to occur under small opening，and the evolution of liquid pressure under cavitation is smoother. On the other hand，the bubbles generated by the cavitation of the valve ports are discharged from the valve body in an asymmetric‘piston’characteristic，which causes the bubble volume in the valve to oscillate periodically at the main frequency of 1355Hz ，and further induces the head of the valve core and the overall hydraulic pressure to fluctuate at the same main frequency.
Key words： high-speed switching valve; cavitation; hydraulic pressure; numerical simulation
0 引言
在液压控制向智能化、高精度、节能化方向发展的过程中，其核心元件高速开关阀凭借模块化设计优势、优越的抗污染性能和显著的成本效益，已成为机电液一体化液压系统升级的关键。（剩余14477字）
