22型客车是我国当前铁路客运的主型客车,其数量约占全部客车数量的62%以上。在今后若干年内仍还将继续生产22型客车,因此研究提高22型客车的检修质量,延长22型客车的使用寿命,具有非常重大的现实意义。我国是从1955年自行设计和制造22型客车的,结构型式仿造50年代苏联加里宁工厂生产的产品。以后虽然有所改进,但基本结 Type 22 passenger car is the main type of passenger current passenger car in China, accounting for more than 62% of the total number of passenger cars. In the next few years, it will still continue to produce Type 22 passenger cars. Therefore, it is of great practical significance to study and improve the quality of service of Type 22 passenger cars and extend the service life of Type 22 buses. Our country designs and manufactures the 22-type passenger car from 1955 by itself, and the structure type imitates the products produced in the Soviet Union Kalinin factory in the 1950s. Although after some improvement, but the basic knot