目前,垦区在东方红—54·75拖拉机发动机修理中,尚存在一些问题。对这些问题,提出个人的认识,供参考。一、缸简、活塞鉴定位置的选择和计算缸筒严重磨损后,缸筒对活塞的导向作用不良,使活塞在缸筒中摆动,气缸内压缩不良,使发动机马力严重下降。缸筒的锥度、椭圆度过大时,将影响活塞环弹力的分布,降低活塞环对缸壁的封闭性能,加速活塞环和环槽的磨损,将直接影响到发动机的动力 Currently, reclamation area in Dongfanghong -54 · 75 tractor engine repair, there are still some problems. For these issues, put forward personal understanding for reference. First, the cylinder Jane, piston identification of the location of the choice and calculation After the serious wear and tear of the cylinder, the cylinder on the poor guidance of the piston, the piston in the cylinder swing, poor compression cylinder, the engine horsepower decline. Cylinder cone, ellipticity is too large, it will affect the distribution of the piston ring elasticity, reducing the piston ring on the cylinder wall sealing performance, accelerated piston ring and ring groove wear, will directly affect the power of the engine