三惰轮内啮合齿轮泵结构特性分析  

Structure Characteristic Analysis of Internal Gear Pump with Three Idlers

作　　者：张宗元[1] 赵升吨[1] 朱牧之[1] 费焱 

机构地区：[1]西安交通大学机械工程学院,陕西西安710049

出　　处：《机床与液压》2015年第7期22-27,共6页Machine Tool & Hydraulics

基　　金：国家重大科技专项(2011ZX04016-081)

摘　　要：在简介了现有内啮合齿轮泵的结构特点与发展方向的基础上,指出改善与优化内啮合齿轮泵结构的必要性。为此,提出了一种新的齿轮泵结构,即新型双联三惰轮内啮合齿轮电机泵。在双联三惰轮内啮合齿轮泵的基础上对其进行内齿圈、密封块的液压力等的分析,得出了内齿圈和密封块所受的径向液压力合力为零,即径向液压力平衡,这有助于提高该泵的运动平稳性和齿轮泵的轴承寿命。采用有限元方法对啮合齿轮的力学特性进行分析,结果表明:在液压力为12.5MPa的理想情况下,内齿圈承受液压力的最大应力为68.8 MPa,最大变形为0.008 mm,承受啮合力的最大应力为131.1MPa,最大变形为0.02 mm。对双联三惰轮内啮合齿轮泵的齿数、模数、压力角等结构参数的设计提供参考。Based on the brief introduction of the structure characteristics and development direction for the existing crescent gear pump,the necessity of improvement and optimization with strcture for crescent gear pump was pointed out. Therefor,the new double internal gear electric motor pump with three idlers was proposed as an innovative structure of gear pump. The hydraulic pressure of annular gear and sealing block was analysed based on dual three idler crescent gear pump,and it was concluded that the radial hydraulic pressure resultant force upon the annular gear and sealing block was zero,namely the balance of radial hydraulic pressure,which was helpful to improve the running smoothness of the pump and lifespan of pump bearing. Then the finite element method（ FEM） was used to analyze the mechanical properties of meshing gear. The results show that under the ideal fluid pressure which is 12. 5 MPa,the maximum stress of inner gear ring is 68. 8 MPa and the maximum deformation is 0. 008 mm,the maximum stress of engaging force is 131. 1MPa and the maximum deformation is 0. 02 mm. The guide is provided for the design of structure parameters for dual three idler crescent gear pump such as number of teeth,modulu and pressure angle,and etc.

关 键 词：三惰轮内啮合齿轮泵 力学特性 结构参数 

分 类 号：TH137.51[机械工程—机械制造及自动化]