球式配流阀内空化数研究  

Study on Cavitation Number in Ball Distribution Valve

作　　者：刘耀卓 万喆[1] 赵宏科 李晨[1] LIU Yao-Zhuo;WAN Zhe;ZHAO Hong-ke;LI Chen(School of Energy and Power Engineering,Lanzhou University of Technology,Lanzhou 730050,China)

机构地区：[1]兰州理工大学能源与动力工程学院,甘肃兰州730050

出　　处：《液压气动与密封》2023年第1期19-24,共6页Hydraulics Pneumatics & Seals

基　　金：国家重点研发计划(2016YFC0304800)。

摘　　要：针对配流阀吸水过程发生空化带来水压泵容积效率低的问题,作者以表征空化特征的空化数为角度,分析了影响配流阀空化数变化的主要因素,开展了配流阀吸水过程相关实验和AMESim仿真研究。结果表明,泵腔内压力变化随工况不同而变化,全工况内的实验与仿真计算所得空化数变化趋势一致。利用阀配流系统模型综合对比了柱塞直径、柱塞行程、阀座锥角、入口直径、余隙容积各特征参数对空化数的影响,得出高转速下各因素对吸水空化程度的影响规律,结果发现,阀座锥角和入口直径不影响空化初始时间,阀座锥角变小后空化程度会有波动变化;柱塞直径和行程的大小只会影响空化发生的先后,并不改变最小空化数;余隙容积增大可显著减小吸水空化发生的时间。Aiming at the problem of low volume efficiency of hydraulic pump caused by cavitation in the suction process of valve,the author analyzes the main factors affecting the change of cavitation number of valve from the perspective of cavitation number,which represents the cavitation characteristics,and carries out related experiments and AMESim simulation research on the suction process of valve.The results show that the variation of the pressure in the pump cavity varies with the different working conditions,and the variation trend of the cavitation number in the whole working conditions is consistent with that of the simulation calculation.Comparison of valve with flow system model integrated the plunger diameter,piston stroke,the seat Angle,inlet diameter,clearance volume each characteristic parameters influence on cavitation number,it is concluded that under the high speed the influence law of various factors on the water absorption degree of cavitation,the results show that the seat cone Angle and inlet diameter does not affect the cavitation initial time,the seat Angle decreases after the degree of cavitation can fluctuate change;The plunger diameter and stroke size only affect the sequence of cavitation occurrence,and do not change the minimum cavitation number.The increase of clearance volume can significantly reduce the time of water absorption cavitation.

关 键 词：配流阀 空化数 空化 容积效率 

分 类 号：TH137[机械工程—机械制造及自动化]