非惯性系下柱塞腔空化及腰形孔结构参数敏感性分析  

Cavitation in Displacement Chamber and Sensitivity Analysis of Kidney Shaped Hole Structural Parameters in Non-inertial Reference Frame

作　　者：刘东强 纪宇龙 孔屹刚[1] 安高成[1] 刘宝玉 王文康 LIU Dong-qiang;JI Yu-long;KONG Yi-gang;AN Gao-cheng;LIU Bao-yu;WANG Wen-kang(School of Mechanical Engineering,Taiyuan University of Science and Technology,Taiyuan,Shanxi 030024;Jiangsu Oscen Hydraulic Technology Co.,Ltd.,Qidong,Jiangsu 226200)

机构地区：[1]太原科技大学机械工程学院,山西太原030024 [2]江苏欧盛液压科技有限公司,江苏启东226200

出　　处：《液压与气动》2023年第7期18-27,共10页Chinese Hydraulics & Pneumatics

基　　金：国家重点研发计划(2021YFB3400502)。

摘　　要：为适应轴向柱塞泵高速化发展趋势,建立了非惯性系下腰形孔压降理论模型,依托柱塞泵CFD仿真模型,进行了柱塞腔压力分布、空化研究及腰形孔参数敏感性分析。研究结果表明:柱塞泵运行工况对柱塞腔空化程度有一定影响,气体体积分数随着转速的升高和入口压力的降低而增大。高转速下,柱塞腔内部流体出现较大的轴向和径向压力梯度,压力分布情况恶劣,部分低压区域出现空化现象。改变腰形孔径向倾角、高度、切向偏转角、入口倒角和出口倒角等结构参数,可有效降低柱塞腔空化程度。In order to high-speed development of axial piston pump,a theoretical model of pressure drop for the kidney shaped hole in non-inertial reference frame is established.Based on CFD simulation model,pressure distribution and cavitation in the displacement chamber are studied and sensitivity analysis of the kidney shaped hole structural parameters are carried out.The results show that operating conditions have a certain impact on cavitation in the displacement chamber,and the vapor volume fraction increases with the increase of rotational speed and the decrease of inlet pressure.At high rotational speed,there are large pressure gradients in axial and radial,and cavitation occurs in some low-pressure areas.Optimizing the kidney shaped hole structural parameters can effectively suppress cavitation in the displacement chamber,such as radial inclination,height,tangential deflection angle,inlet chamfer and outlet chamfer.

关 键 词：柱塞泵 空化 腰形孔 高速化 

分 类 号：TH137[机械工程—机械制造及自动化] TH322