不同吸油口尺寸及转速下齿轮泵空化特性  

Cavitation Characteristics of Gear Pump Under Different Suction Port Sizes and Speeds

作　　者：杨国来[1,2] 王文宇 黄付田 张明明 YANG Guo-lai;WANG Wen-yu;HUANG Fu-tian;ZHANG Ming-ming(College of Energy and Power Engineering,Lanzhou University of Technology,Lanzhou,Gansu 730050;State Key Laboratory of Fluid Power and Mechatronic Systems,Zhejiang University,Hangzhou,Zhejiang 310027)

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 [2]浙江大学流体动力与机电系统重点实验室,浙江杭州310027

出　　处：《液压与气动》2020年第1期74-79,共6页Chinese Hydraulics & Pneumatics

基　　金：国家重点实验室开放基金(GZKF-201823)

摘　　要：针对外啮合齿轮泵高转速下空化现象严重的问题,对外啮合齿轮泵空化的发生及其影响因素进行研究。运用吸油腔几何模型,推导出其容积变化率及介质压力变化模型,分析了吸油口尺寸及转速对吸油腔介质最小压力的影响;运用PumpLinx在不同转速及吸油口尺寸下对外啮合齿轮泵进行了仿真,分析了不同条件下泵的空化特性及吸油稳定性。结果表明:啮合点位置的变化与吸油腔压力的变化有很大关系;转速及吸油口尺寸对腔内最小介质压力有很大的影响;同时空化极大的影响了吸油口的流量稳定性。在模型推导和仿真计算的过程中考虑了外啮合齿轮泵很多实际因素,这些研究对齿轮泵的设计及性能优化有重要的参考价值。In view of the serious problem of cavitation at high speed of external gear pump,the occurrence of cavitation of external gear pump and its influencing factors are studied.Using the geometric model of the suction cavity,the volume change rate and the fluid pressure change model are derived,and the influence of the suction port size and rotational speed on the minimum pressure in the oil suction chamber is analyzed.The external gear pump was simulated by PumpLinx at different speeds and suction port sizes.The cavitation characteristics and oil absorption stability of the pump under different conditions are analyzed.The results show that the position of the contact point as a great relation with the pressure in the oil suction chamber;the rotational speed and the size of the oil suction port have a great influence on the minimum pressure in the cavity;cavitation also has a great influence on the oil absorption stability.In the process of model derivation and simulation calculation,many practical factors of external gear pump are considered.The conclusion investigated in this study will provide much scientific information for designing and optimizing gear pumps.

关 键 词：外啮合齿轮泵 吸油口尺寸 转速 空化 吸油稳定性 

分 类 号：TH137[机械工程—机械制造及自动化]