说明：  本文旨在改进设计齿轮泵的卸荷槽,使外啮合齿轮泵运行时得到更高的工作压力和容积效率,使噪声更低,工作更平稳。
(This paper aims to improve and design the unloading groove, so that the outer meshing gear pump is running in a higher working pressure and volumetric efficiency,it will make less noise and more stable work. )