外啮合齿轮泵困油面积和卸荷面积计算式的建立  

Established Formulas for Trapped-oil Area and Relief-load Area of External Spur-gear Pump

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：《农业机械学报》2009年第6期203-207,共5页Transactions of the Chinese Society for Agricultural Machinery

基　　金：安徽省自然科学基金资助项目(2004KJ317);合肥工业大学创新科技基金资助项目

摘　　要：为利于后续困油现象的定量分析,基于泵齿轮传动的几何关系及它与卸荷槽的空间位置关系的解析和过渡曲线的适当简化,以啮合点与节点之间的距离为变量,建立了困油面积的计算公式和卸荷面积的拟合公式,并对计算结果与由精确的虚拟模型获得的测量结果进行了对比。研究表明:困油面积和卸荷面积均可采用不同指数的抛物线线型表示,过渡曲线的简化是可行的,提供的拟合常数可直接使用。得出的两面积计算公式正确可靠,可直接用于后续困油压力的预测。In order to study quantitatively the trapped-oil phenomenon, with distance between meshing point and nodal point as a variable, a formula for calculating trapped-oil area and a fit formula for calculating relief-load area were derived from the geometrical relationship of gear transmission and positional relationship of relief groove. The calculated results were compared with the measured results from an accurate 3-D model. The results indicated that trapped-oil area and relief-load area could be expressed by a parabola with different index; simplified transition curve is feasible for calculating the two areas; fitting constant derived could be directly used aimed at different tooth number and module for calculating relief-load area. Finally, the two area-formulas were proved feasible to be used for forecasting the trapped oil pressure.

关 键 词：外啮合齿轮泵 困油面积 卸荷面积 拟合公式 

分 类 号：TH325[机械工程—机械制造及自动化]