前进型蒸汽机车汽室套的偏段磨和拉伤是一种常见的不良现象。我段1981年因偏段磨或拉伤而旋修的汽室套共93个,1982年为42个。为了减少汽室套的偏段磨和消除拉伤现象,以提高汽密、节约燃料和延长汽室套的使用寿命,对该不良现象进行了分析、研究,并制定了措施。一、原因机车经过一段时间的运用,汽室套的偏段磨和拉伤往往同时存在。汽室阀在汽室套内高温、高压条件下作往复运动,产生磨耗是不可避免的,只能设法减小磨耗量;拉伤 Partial steaming and steaming of the steam locomotive steam chamber cover is a common phenomenon. In 1981, a total of 93 air chamber covers were repaired due to partial grinding or straining, 42 in 1982. In order to reduce the eccentric wear of the steam chamber sleeve and eliminate the phenomenon of strain, improve the steam-tightness, save the fuel and extend the service life of the steam chamber sleeve, the bad phenomenon was analyzed, studied and the measures were formulated. First, the reason locomotive after a period of use, steam chamber sets of partial wear and tear tend to exist at the same time. Steam chamber valve chamber in the high temperature and pressure conditions for reciprocating motion, resulting in wear is inevitable, can only try to reduce the amount of wear; strain