摘要
本文研究液压管路的节流口蒸汽型气穴(空化)发生的条件,建立了数学模型,并进行了计算及实验研究。结果表明,以节流口前后液体压强比λ_p这一单参数来确定节流气穴发生条件是合适的,但对不同类型的节流口,以及同一节流口在不同流量系数下工作时,临界压强比λ_p不同,流量系数C_q和节流断面速度不均匀系数K_(?)(或二次涡系数K_v)是影响λ_p的两个主要因素。
In this paper, the conditions for cavitation onset in a pipeline of fluid power transmission and control systems are studied. A mathematic model is set up, numerical and experimental investigations are carried out. The results show that for cavitation in the flow-restriction region, it is reasonable to use the ratio λ_p of the inlet pressure to the outlet pressure of the orifice as the unique parameter for determining cavitation in. ception condition, but for different types of orifices and different working conditions of the same orifice, the critical values λ_p~* are not the same. The volume rate coefficient C_q of the flow and the velocity distriibution coefficient K_s (or the secondary vortex coefficient K_v) are the main factors affecting it.
基金
冶金部教育司经费资助
关键词
气穴
液压系统
节流
Cavitation
Fluid power transmission system
Flow restriction.
