桥式起重机运行机构正常行驶时,车轮轮缘与钢轨应保持有一定的间隙,当起重机由于某种原因使车轮相对钢轨产生横向滑动时,车轮轮缘与钢轨相挤,在运行中产生强烈的磨损,出现啃轨现象。起重机啃轨是车轮轮缘与钢轨摩擦阻力增大的过程,也是车架走斜的过程,啃轨会使车轮和钢轨很快报废。正常工作情况下车轮根据工作级别可以使用5a以上甚至到10a。严重的啃轨使车轮寿命大大降低,有的1～2a,也有的几个月就报废。啃轨严重也会引发起重机脱轨并造成事故。啃轨的原因主要是由轨道缺陷或车轮缺陷,也可能由车轮运行不同步等。武汉钢铁集团公司1台桥式起重机在设计工况下运行,不足1个 Bridge crane operating mechanism normal running, the wheel rim and rail should maintain a certain gap, when the crane for some reason the wheel relative to the rail lateral slide, the wheel rim and the rail phase of the squeeze, in operation have a strong Wear, there gnawing track phenomenon. Gnawing rail crane is the wheel rim and rail friction increases the process, but also the process of walking the ramp frame, the rail will make the wheels and rails quickly scrapped. Under normal working conditions, the wheels can be used for more than 5a and even 10a according to the working level. Serious gnawing rails greatly reduce wheel life, and some 1 ~ 2a, but also a few months scrapped. Gnawing serious rail will lead to derailment of the crane and cause an accident. Gnaw track is mainly due to rail defects or wheel defects, may also be run by the wheel out of sync. Wuhan Iron and Steel Group 1 bridge crane operating under design conditions, less than one