摘要
针对轴向柱塞泵吸排油过程发生空化带来流体激振力大,甚至造成严重的局部气蚀破坏问题,使用用户自定义函数和动网格法对柱塞泵的动态运动过程进行模拟。通过柱塞泵空化流激振动特性实验,对比分析柱塞泵空化流激振动响应特征,获取轴向柱塞泵空化流动及其诱导振动的作用机理。结果表明:柱塞腔内气体体积分数随缸体转角变化呈周期性振荡,空化现象主要集中在泵的吸油区;当缸体转角处于吸排油交替区时,柱塞腔内压力场出现负压现象,气泡在流体射流的方向上扩散,形成明显的局部空化云;柱塞泵空化流激振动频谱与流体脉动载荷频谱重合,直接影响柱塞泵壳体振动的幅值,成为柱塞泵壳体振动响应的主要诱因。
To address the issue of large fluid-induced vibration force and even serious local cavitation erosion damage caused by cavitation during the suction and discharge process of axial piston pump,the dynamic motion process of the piston pump is simulated using user-defined function and the dynamic mesh method.By conducting experiments on the cavitation flow-induced vibration characteristics of piston pump,the response characteristics of cavitation flow-induced vibration in piston pump are compared and analyzed,and the mechanism of cavitation flow-induced vibration in axial piston pump is obtained.The results show that the volume fraction of gas in piston chamber oscillates periodically with the change of cylinder angle,and cavitation phenomenon is mainly concentrated in the suction area of the pump;When the cylinder angle is in the alternating zone of suction and discharge,a negative pressure phenomenon occurs in the pressure field inside the piston chamber,and bubbles diffuse in the direction of the fluid jet,forming a clear local cavitation cloud.The frequency spectrum of cavitation induced vibration of piston pump coincides with the frequency spectrum of fluid pulsating load,directly affecting the amplitude of piston pump shell vibration and becoming the main cause of piston pump shell vibration response.
作者
张佳晨
王佳伦
汤何胜
任燕
赵申诞
ZHANG Jiacheng;WANG Jialun;TANG Hesheng;REN Yan;ZHAO Shendan(College of Mechanical and Electronic Engineering,Wenzhou University,Zhejiang,Wenzhou 325035)
出处
《液压与气动》
北大核心
2024年第11期64-73,共10页
Chinese Hydraulics & Pneumatics
基金
国家自然科学基金(52275064)
温州市重大科技创新攻关项目(ZG2021019)。
关键词
轴向柱塞泵
配流盘
三角槽
空化
流激振动
axial piston pump
port plate
triangular groove
cavitation
flow-induced vibration
