直线共轭内啮合齿轮泵流量脉动特性研究  

Research on Flow Fluctuation Characteristics of Linear Conjugated Internal Gear Pump

作　　者：宣元 何琳[1,2] 陈宗斌[1,2] XUAN Yuan;HE Lin;CHEN Zongbin(Institution of Vibration&Noise,Naval University of Engineering,Wuhan Hubei 430033,China;National Key Laboratory of Ship Vibration&Noise,Naval University of Engineering,Wuhan Hubei 430033,China)

机构地区：[1]海军工程大学振动与噪声研究所,湖北武汉430033 [2]海军工程大学船舶振动噪声国家重点实验室,湖北武汉430033

出　　处：《机床与液压》2021年第9期171-176,共6页Machine Tool & Hydraulics

基　　金：国防科技重点实验室基金项目(6142204180301)。

摘　　要：基于面积扫过法计算直线共轭内啮合齿轮泵理论瞬时流量,得到啮合点位置与泵瞬时流量的对应关系,进而求得泵几何流量脉动。产生困油容腔是泵实际运行过程中普遍存在的现象,也是影响泵出口流量平稳性的关键因素。对直线共轭内啮合齿轮泵运行过程进行分析,依据控制容积法将内部流道划分为吸油容腔、排油容腔、齿轮齿间容腔、齿圈齿间容腔和困油容腔。建立直线共轭内啮合齿轮泵AMESim仿真模型,并对泵内部流体运动状态进行分析及仿真验证。结果表明:加入困油容腔的子模型后,该模型能够反映泵实际运行中因困油容腔的产生导致的瞬时流量突变;仿真模型的流量脉动率为2.29%,高于几何流量脉动率(1.71%)。研究结果揭示了泵流量脉动的产生原因及变化规律,为直线共轭内啮合齿轮泵流动特性研究及优化设计工作提供了参考。Theoretical instantaneous flow of the linear conjugated internal gear pump was calculated based on the area sweep method,the corresponding relationship between the position of the meshing point and the instantaneous flow of the pump was obtained,and then the geometric flow ripple of the pump was calculated.The occurrence of trapped oil chamber is a common phenomenon during the actual operation process of the pump,and it is also a key factor affecting the smoothness of the pump outlet flow.The operation process of the linear conjugate internal gear pump was analyzed,the internal flow channel was divided into suction chamber,oil discharge chamber,gear intergrade chamber,gear ring intergrade chamber,and trapped oil chamber according to the control volume method.The AMESim simulation model of the linear conjugated internal gear pump was established,and analysis and simulation verification for the fluid movement status inside the pump were carried out.The results show that the model can reflect the instantaneous flow mutation caused by the occurrence of trapped oil chamber in the actual operation of the pump;the flow ripple rate of the simulation model is 2.29%,higher than the geometric flow ripple rate which is 1.71%.The research result reveals the cause and changing rules of the pump flow ripple,and provides a reference for the flow characteristics research and optimization design of linear conjugate internal gear pump.

关 键 词：直线共轭内啮合齿轮泵 容腔模型 AMESIM仿真 流量脉动 

分 类 号：TH137[机械工程—机械制造及自动化]