1问题的提出制动梁是铁道车辆上最重要的制动部件之一,它的损伤故障对铁路行车安全和运输影响极大。自2007年4月18日第6次大提速以来,新型车辆大量投入运用,货车的运行速度显著提高,在新的运用环境下,出现了一些新的故障,其中L—B型制动梁闸瓦托 1 The issue of the proposed brake beam is one of the most important brake components on railway vehicles, its damage to the railway traffic safety and transport a great impact. Since the sixth major speed increase on April 18, 2007, a large number of new vehicles have been put into operation and the running speed of trucks has been significantly increased. Under the new operating environment, some new faults have emerged. Among them, the L-B brake brake Vatot