Railway wagon hot rolling bearing axial profile

Introduction of railway wagon hot rolling bearing shaft causes 2019 - 10 - 04 at present, our country is made up of railway wagon basically rolling bearing, implement the overall improve the level of railway truck technology. But internal fault reasons of rolling bearing is relatively difficult, long plagued inspection personnel assignment. Vehicle sector in the long-term practice sums up the rolling bearing fault 'seven words test' judgment method, ( Namely: listen touch twisting Jane jian) Basically, filled in the column blank check in judging rolling bearing applause. By truck rolling bearing fault 'seven words test study, application, inspection car vehicle team to prevent a lot of rolling bearing fault. Now in railway freight car rolling bearings hot shaft, analyses the reasons why. 1. Bearing parts damage to bring about roller broken or partial defect; Bring about roller or roll strip; Can bring about roller ball base and penal lead surface scratch; Bring about inner ring broken or loose; Bring about cage wear or fracture; Bring loose seal cover and rubber oil seal dislocation. 2. Accessories bearing fault bring shaft end is loose; Bring back loose; Bring about load-bearing saddle with the bearing outer ring fit clearance is not correct; Bring about load-bearing saddle and cover before and after collision and friction. 3. Bad lubrication state bring about bearing grease is too little or too much; Bring about internal oil deterioration. 4. Repair technology does not bring about thoroughly bearing cleanliness is not high; Bring to incorrect bearing clearance. 5. The bad condition of bogie technology bring about bogie on both sides of the fixed wheelbase differ too much; Bring the same wheel to wheel radius is too large; Bring the wheel tread scratches, stripping; Bring between bearing and guide box axial clearance is too large. （ Source: the resources of railway vehicle platform)