考虑困油和卸荷的外啮合齿轮泵动态转矩计算  

Calculation of dynamic torque acted on external gear pump considering relief groove and trapped oil pressure

作　　者：李玉龙[1,2] 刘焜[1] 

机构地区：[1]合肥工业大学机械与汽车工程学院,合肥230009 [2]合肥学院机械工程系,合肥230022

出　　处：《农业工程学报》2009年第4期91-95,共5页Transactions of the Chinese Society of Agricultural Engineering

基　　金：安徽省自然科学研究项目(2004KJ317)

摘　　要：为研究困油压力及异、同齿数对外啮合齿轮泵转矩影响,从分析直齿轮传动与卸荷槽的几何关系入手,将啮合齿面分成八点、三区、七过程。以主动齿轮的啮合半径为变量,建立出一个啮合周期内转矩的静态和动态计算式,并以实例加以分析比较。结果表明:转矩的波动及其最大峰值随困油压力的增加而加大,但最小峰值基本保持不变,同齿数的转矩品质要优于异齿数,以及转矩的静态计算误差较大等;困油压力对转矩的影响很大,设计上应尽量克服之,异齿数对泵各项性能的影响是相异的,不能一概而论。For research the effect of trapped oil pressure and teeth number on dynamic torque of external gear pump,meshing process was geometrical analyzed by dividing tooth surface into eight meshing point,three different areas and seven meshing stages. With meshing curvature radius of driving gear as a variable in a tooth period,the corresponding static and dynamic torque formula were derived. The special analysis and comparison were achieved with an instance. All results indicated that the higher trapped oil pressure,the more fluctuation of torque and higher value of max amplitude,but the min amplitude of torque was generally unchanged; the quality of meshing torque with the same teeth number of the gears was better than dissimilar teeth number. Static torque formula had a bigger calculation error. A lot of important conclusions were educed,which trapped oil pressure had a great negative influence on torque,and dissimilar teeth number of meshing gears had different influence on various performance of external gear pump,therefore trapped oil pressure should be eliminated as far as possible and the predominance of dissimilar teeth number on uniform teeth number wasn＇t absolutely positive.

关 键 词：外啮合齿轮泵 卸荷槽 困油压力 动态转矩 异齿数 

分 类 号：TH325[机械工程—机械制造及自动化]