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1990年11月,我厂船舶生产流水线上的一台M40-31型门座起重机(以下简称门机),其主起升机构(机构布置如附图所示)快速系统,无论是空钩或负载作上升、下降动作时,行星齿轮减速器5以及制动器的制动臂均偶而产生明显的异常振动,并有较弱的异常响声从行星齿轮减速器处传出。但是,这种振动的特点与常见的机械因素(如齿轮啮合冲击、滚动轴承破碎造成的传动轴堵转、机械联接件脱落等)引起的振动有所不同,它没有规律性,在快速系统高
In November 1990, a M40-31 portal crane on the ship’s production line (hereinafter referred to as the door machine) and its main lifting mechanism (institutional layout as shown in the figure) When the load is ascending and descending, the planetary gear reducer 5 and the brake arm of the brake both produce obvious abnormal vibration, and the weaker abnormal noise is transmitted from the planetary gear reducer. However, the characteristics of this kind of vibration are different from the vibrations caused by common mechanical factors (such as gear meshing impact, blocking of the transmission shaft caused by the rolling bearing crushing, falling off of the mechanical coupling, etc.) and irregularity in the rapid system height