(1) Poor smooth quality. Smooth intent is to make dynamic graphite inlaid bearing lubrication state some do not touch directly touch the conflict, and constitute the conflict between solid and liquid. If the lack of smooth or poor quality of oil will make some direct dynamic conflict heat, or heat can not be taken away by the smooth oil, leaving the bearing temperature.

(2) Rolling bearing installation of poor quality. Such as the inner sleeve of copper alloy bushing and the axis of the tight, jacket and bearing seat clearance is too large or too small.

(3) poor quality bearings. Sliding bearing scraping poor quality, bad touch or uranium touch; rolling bearing rolling solid copper-based solid inlaid bearing lubrication cracks, chipping, peeling, etc., will damage the stability and uniformity of the film, the surface of the bearing fever.

(4) sealing felt too tight and fever.

(5) bearing vibration is too large to withstand the impact load, seriously affecting the stability of the oil film.

(6) bearing cooling water lack or interruption, affecting the heat out, leaving the bearing temperature.