The Experimental Research on Friction and Wear of the New Type Rock Bit Floating Ring Journal Bearing

摘要

A new type rock bit floating ring journal bearing is designed to solve the current problems of large heat, excessive wear and short life of rock bit journal bearing in high-speed and heavy-loads conditions, and the experimental research on friction moment, temperature rising and friction loss of bearings are carried out in different parameters and different working conditions. The experimental results show that the floating ring speed is changed because of the influence of loads and cone speed, the mean speed of floating ring remains relatively constant when the loads and the cone speed are constant and the speed of floating ring slows down as the speed increases, the inner and outer clearance of rock bit floating ring journal bearing have much effect on the speed of floating ring, the bearing life can significantly extend when the inner clearance is 0.058-0.064 and the outer clearance is 0.024-0.030, the rock bit floating ring journal bearing have more excellent tribological properties compared to the traditional thrust bearings and can replace the silver mangansese alloy slot currently used for the thrust bearings. The research provides important basis for further develop working performance research of rock bit floating ring journal bearing and design the new type rock bit floating ring journal bearing.