柱塞副是燃油系统中的精密偶件,其主要要求是: (1)柱塞在柱塞套中能自由地上下滑动和左右旋转,不得有任何阻滞现象,以实现喷油泵正常的供油和油量调节。 (2)柱塞和柱塞套之间要有良好的密封性,以防燃油泄漏,否则很难保证不同转速、不同工作状况下所需要的精确油量,也不易建立起足够的供油压力,保证良好的喷油量。 柱塞副工作中,由于燃油的流速和压力很高,且燃油中或多或少都含有机械杂质,所以工 The plunger pair is a precision coupling in the fuel system. The main requirements are: (1) The plunger can freely slide up and down and rotate left and right in the plunger sleeve without any blocking phenomenon, so as to realize the normal supply of the fuel injection pump Oil and fuel adjustment. (2) between the plunger and plunger sleeve should have a good seal to prevent fuel leakage, otherwise it is difficult to ensure that different speed, different working conditions require the precise amount of oil, it is not easy to establish sufficient supply pressure , To ensure a good amount of fuel injection. Plunger work, due to the high velocity and pressure of the fuel, and the fuel contains more or less mechanical impurities, so workers