齿轮泵浮动侧板端面密封失效机理分析验证

通过研究齿轮泵侧板端面密封失效机理，得出由主从动齿轮工作腔压力非对称分布产生的侧板倾覆力矩是导致端面密封失效的关键因素.以某型号高压齿轮泵为研究对象，首先建立齿轮泵内部流场的非线性微分方程，理论推导主从动齿轮工作腔压力分布的非对称性；其次建立齿轮泵齿轮工作腔压力测试系统，对齿轮泵浮动侧板端面密封失效机理进行试验验证.试验数据表明:对应点压力试验数值与理论值误差小于5.0%，额定工况下浮动侧板关于x轴的倾覆力矩Mx=56.51 N·m.
According to the study on the failure mechanism of gear pump face seal, the key factor of face seal failure is the end plate’s overturning moment induced by the asymmetric pressure distribution in a master slave gear cavity. For a type of high pressure gear pump, the nonlinear differential equation of gear pump pressure transition zone was established to analysis the internal flow field of the master slave gear cavity. Then the test system of gear pump cavity pressure was built to verify the failure mechanism of the floating end plate of gear pump. Test data shows that the error between experiment and theoretical value is less than 5.0%. The floating end plate’s overturning moment about x axis is 56.51 N·m under rated conditions