齿轮泵主从动齿轮腔压力分布的非对称性分析

在解析齿轮泵工作腔流场分布特点的基础上,主要研究了主从动齿轮腔压力分布非对称现象.以某型号高压齿轮泵为研究对象,通过分析齿轮轴挠度与径向间隙的关系和建立过渡区压力非线性微分方程,对比相应位置的压力值得出主从动齿轮腔压力非对称分布的结论.试验数据表明:额定工况下试验数值与理论值误差小于5.0%,过渡区压力相差4.17 MPa,高压槽末端压力相差1.55 MPa.该研究为高压齿轮泵工作腔压力分布非对称解析及侧板倾覆力矩计算提供了理论基础.

Asymmetric Analysis of Pressure Distribution in the Gear Pump's Master-SlaVe Gear CaVity

Based on the distribution features of a gear pump’s flow field， the asymmetric pressure distribution in the master-slave gear cavity was analyzed. Taking a certain type high-pressure gear pump as the research object， the relationship between the radial clearance and the deflection of gear shaft was analyzed. The nonlinear differential equation of pressure in the transition zone was established. Comparing the corresponding position pressures of both master and slave gear side cavities， it could be concluded that the pressure distribution of a gear pump’s master-slave gear cavity is asymmetric. The experimental data showed that the corresponding point pressure value between the experimental and theoretical error is less than 5.0%. The master and slave pressure difference is 4.17MPa in the transition zone， and the pressure difference is 1.55MPa at the end of high-pressure groove under the rated conditions. This study provides a theoretical basis on the asymmetric analysis of pressure distribution in the high-pressure gear pump’s gear cavity and on the calculation of floating end plates’ overturning torque.