The advantages of railway freight car rolling bearings are sliding bearing

The advantages of railway freight car rolling bearings are sliding bearing 2018 - 10 - 08 one, rolling bearing the application of the rolling bearing in the railway wagon in China railway truck application relatively late in our country, China's first railway wagon loaded with sliding bearing. At the beginning of the truck for rolling bearing sliding bearing, the failed to identify the most suitable for China's environmental demands and the line of bearing type cases, rolling bearing mainly imported, to design a small amount of loading operation, took a variety of different types of rolling bearing loading time to run test, has axle box short cylindrical bearings, taper roller bearing axle box, axle box short cylindrical bearing structure of the rolling bearing device. As railway wagon of new technology, new materials, new technology into use and the new requirements of railway truck speed, overload, and through technical communication for many times, and foreign bearing company research and development of the compact bearings for railway cargo application in our country, so far, our country railroad truck has been realizing the rolling bearing. Second, the railway wagon loading compared with rolling bearing and sliding bearing, has the following advantages: 1, the rolling bearing small friction coefficient, can improve the locomotive traction, the friction coefficient of rolling bearing much smaller friction coefficient than sliding bearing, so the railway wagon loaded with rolling bearings can greatly reduce the starting resistance of the vehicle and running resistance. 2, to improve the safety of the vehicle running, sliding bearing, direct contact with journal bearing contact area is large, quick wear at work, calorific value is big, and not easy to send out, therefore, likely to cause a hot shaft accidents; Rolling bearing because of wear and tear is small, calorific value is small, and easy to send, so can reduce the 'hot' and 'eager' the incidence of accidents, ensure the driving safety. 3, high speed rolling bearing, the bearing capacity is big, after the railway wagon loaded with rolling bearing, the loading weight and allowed to run speed is packed with sliding bearing are improved significantly. 4, shorten the maintenance time, to speed up the turnover of vehicles, increasing the service efficiency of the vehicle, the use of rolling bearing of vehicles, cancelled the shaft inspection, reduce the repairing time, extend the railway truck repair cycle, in general, when the truck loaded with rolling bearings in minor, just a visual inspection of rolling bearings and turn the check, if no abnormalities can continue to use, the use of sliding bearing vehicles, because the shaft more frequently, and maintenance for a long time, directly affect the efficiency of the vehicle. 5, reduce the operation cost of railway wagon, save a lot of grease, white metal materials, such as rolling bearing in normal use, only used in rolling bearing loading after reaching prescribed, to make the withdrawal of general maintenance and repair, returned to the factory repair or scrap, and sliding bearing vehicles, every six months on a shaft, and the change of grease, bearing bush. 6, easy to use, simple maintenance of rolling bearing manufacture and repair are now realize the specialization and standardization, and high interchangeability, adjustment, maintenance, lubrication of the bearing, installation, disassembly is very convenient, therefore, rolling bearing is widely used in railway vehicle. （ Source: the resources of railway vehicle platform)