齿轮泵高速困油研究及卸荷槽创新

Higher-speed Trapped-oil Pressure Research and Relief-groove Invention for Gear Pump

为满足齿轮泵高速下困油的充分卸荷,基于同样的齿形参数和工况条件,先后进行了实验、仿真和理论分析。给出了新槽的形位及尺寸;进行了困油压力的实例运算。由实验、仿真和理论结果的一致性,说明了理论分析的正确性;在0. 03 mm小侧隙下,当转速分别为1 000 r/min、3 000 r/min、5 000 r/min时,新槽、矩形槽的压力峰值增加率分别为1. 75%、15. 00%、41. 5%和9. 50%、85. 00%、236. 25%,说明矩形槽能满足低速困油卸荷要求,新槽能满足中速困油卸荷要求;转速5 000 r/min和0. 2 mm大侧隙下,新槽的压力峰值增加率为22. 75%,说明能满足高速下的卸荷要求。

To achieve the abundant relief of high-speed trapped-oil for gear pump,based on the same tooth profile parameters and working conditions,the experiment,simulation and theoretical analysis are carried out successively.Secondly,the shape,position and size of the new groove are given.Finally,the case calculation of trapped-oil pressure were carried out.The results show that the theoretical analysis is correct by the consisten.cy of experiment,simulation and theoretical results.Under the speeds of 1 000 r/min,3 000 r/min,5 000 r/min and 0.03 mm small backslash,the increase rate of the pressure peak of the new groove and the rectangular groove are 1.75%,15%,41.5%and 9.50%,85%and 236.25%respectively.It shows that the rectangular groove can meet the relief requirement of trapped-oil under low speeds,and the new groove can meet the relief require.ment of trapped-oil under medium speeds.Under the high speeds of 5 000 r/min and 0.2 mm large backlash,the pressure increase rate of the new groove is 22.75%,which indicates that it can meet the relief requirement under high speed.