一般齿轮泵的齿轮齿顶与壳体存在一定的径向间隙,所以必然会产生一定的漏泄,这也是一般齿轮泵输出压力提不高的原因之一。我厂生产的高压齿轮泵没有采用较复杂的径向平衡构造,而是采取了“扫膛”的方法(又称为跑合时“精加工”),即在运转时由于径向受力的关系,将齿顶与壳体进油口一侧,并刮削其壳体内侧。运转时,齿顶与壳体间隙得到了补偿,见图1。由于壳体的材料是铝合金,经 General gear pump gear tooth top and the shell there is a certain radial clearance, it will inevitably produce a certain leakage, which is the general gear pump output pressure is not high one of the reasons. Instead of using a more complicated radial balance structure, the high-pressure gear pump produced by our factory adopts a method of “swell” (also called “finish machining” at the time of running-in), that is, Relationship, the tooth tip and shell into the oil side, and scraping the inside of the shell. During operation, the clearance between the tooth top and the housing is compensated, as shown in Figure 1. As the shell of the material is aluminum alloy