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有一台M40-31型门座起重机(以下简称门机)无论是空载还是负载,主起升机构快速系统(机构布置如图)作起升或下降时,偶尔可以发现该机构中的行星齿轮减速器5以及制动器的制动臂产生明显的异常振动,并伴有较弱的异常响声从5传出。这一振动故障与常见的机械因素引起的振动有所不同,没有周期性,且振幅很大,断续振动,每次持续时间短暂,约为10～20秒。从振动故障的表现形式,很容易认为5就是故障源。
There is an M40-31-type portal crane (hereinafter referred to as the door machine) no-load or load, the main lifting mechanism rapid system (institutional layout as shown) for lifting or descent, and occasionally found in the agency’s planetary gear The decelerator 5 as well as the brake arms of the brake produce significant abnormal vibrations accompanied by a weaker anomaly noise coming out of the 5. This vibration failure and common mechanical factors caused by the vibration is different, there is no periodic, and the amplitude is large, intermittent vibration, each duration is short, about 10 to 20 seconds. From the manifestation of vibration failure, it is easy to think that 5 is the source of the fault.