The shaft of the railway freight car rolling bearing temperature

The shaft of the railway freight car rolling bearings temperature 2020 - 04 - 28 axial temperature of railway freight car rolling bearings, mainly by the rolling friction between the roller and the inner and outer ring raceway, the sliding friction between the roller and cage, roller end and sliding friction between the inner ring gear side, and the heat generated by the friction between the roller and grease and other; At the same time, also with the load on the bearing, speed, line status, temperature, wind speed, continuous operation time and sunlight and other factors. The temperature of the rolling bearing directly reflect the running status of bearings, normal temperature shows that work well. At present, the railway wagon is used in great quantities in the application of the infrared temperature detection system for use in railway freight car rolling bearings temperature real-time monitoring, makes the vehicle significantly lower the possibility of hot axle, played an important role in preventing the hot axle. In inspection work field to reach the goods train technical inspection, based on the infrared temperature detection system forecast tracking vehicles or for infrared temperature detection system fault, need to hand or rolling bearing temperature thermometer inspection, check the location should be in the lower part of the train running direction bearing outer ring diameter, should not be in the front cover, back block, seal cover the place such as temperature measurement. At the beginning of the use of new bearing in the running-in stage, average temperature is higher, but the rolling bearing temperature atmospheric temperature difference with the outside world is highest should not exceed 70 ℃. Under the condition of normal operation, the bearing temperature is higher than atmospheric temperature around 10 ~ 30 ℃, SKF bearing temperature rise is higher) 。 If the rapid digital display thermometer measurement, bearing temperature is higher than the outside temperature above 40 ℃ or hand touch the bearing outer ring cannot park around 2 s, are considered to be bearing overheating. To express boxcars tra nsport ( K2 bogie) And express X1K container flat car, absolute temperature does not exceed 80 ℃ ( The measured temperature) , not more than 55 ℃ temperature, such as more than, is seen as bearing overheating must uncouple processing. After bearing failure if not found in time, it may turn into hot axle accident, eagerly shaft failure occurs, journal is usually run long and cut off, take off the line of the vehicle or subversion, bearing severe fever burned, sometimes even can appear the partial melting adhesion of bearing components. Preventing the hot axle focus is to improve the quality of bearing, the fault of bearing failure reason analysis and put forward countermeasures for the prevention of bearing fault diagnosis and bearing heating process of detection and alarm, etc. （ Source: the resources of railway vehicle platform)