The temperature of angular contact ball bearings generally rises gradually and should not exceed 100°C. However, due to the high temperature in summer, the phenomenon of bearing overheating occurs frequently, most of which are caused by poor lubrication or excessive clearance and excessive speed. Yes, then we need to take measures for specific problems.
1. The temperature of angular contact ball bearings
The normal temperature of the bearing varies with the heat capacity, heat dissipation, speed, and load of the machine. Generally, the temperature of angular contact ball bearings gradually rises with the operation of the bearing and reaches a stable state after 1 to 2 hours. If the lubrication or installation is improper, the bearing temperature will rise sharply and abnormally high temperature will occur. At this time, the operation must be stopped and the necessary precautions must be taken. The use of thermal sensors can monitor the working temperature of angular contact ball bearings at any time, and automatically alarm or stop when the temperature exceeds the specified value to prevent combustion shaft accidents.
1）. If the matching interference is large, the bearing should be heated in an air heating furnace or oil furnace with automatic temperature control, and the heating temperature should be strictly controlled below 100°.
2）. Bearings equipped with a nylon cage can work continuously and stably for a long time at -40°C~120°C.
3）. Long-term continuous rotation of the bearing at a temperature exceeding 125°C will reduce the bearing life.
4）. Working at 150° should not exceed 4 hours, and the short-term temperature peak can reach 180°.
2. Factors affecting the temperature of angular contact ball bearings
Causes of high-temperature bearings include insufficient or excessive lubrication, lubricants. Containing impurities, excessive load, angular contact ball bearing ring damage, insufficient clearance, and high friction caused by oil seals.
1). Applied load
The heat generation of angular contact ball bearings is related to the applied load and speed. The greater the load, the higher the speed, the more heat generated, and the higher the temperature.
2). Centrifugal force
The heat generation of angular contact ball bearings is related to centrifugal force. When centrifugal force is considered, the temperature of each node of the bearing increases significantly. As the speed increases, the influence of the centrifugal force on temperature becomes more obvious.
3). The spin of the ball
The heat generation of angular contact ball bearings is related to spin. When considering the spin of the ball, as the speed of axial force increases, the temperature of the bearing inner ring channel, inner ring, rolling element, and main shaft increases, so angular contact The spin effect of ball bearings cannot be ignored.
3. Angular contact ball bearing overheating solution
1. Incorrect installation position of the bearing will cause larger axial force between the end face of the ball and the bearing seat inner race and outer race stop, causing the bearing to overheat. When installing the bearing, the force should be uniform and not directly hammered.
2. The bearings used need to select the bearings of the specified accuracy class.
3. The solution to the heating caused by the bending of the bearing spindle in use or the misalignment of the box hole is to repair the spindle
4. The bearing belt is too tight to cause heat, adjust the belt to make it tight.
5. Poor lubrication can cause heat, so attention should be paid to the selection of angular contact ball bearing grease. The lubrication materials of the specified brand should be selected and cleaned appropriately.
6. Low assembly quality causes heat generation and improves assembly quality.
7. The running circle of the bearing inner and outer shell causes heat. Replace the bearing and related wear parts to correct the diameter of the impeller balance hole and check the static balance value.
8. Too much axial force will cause heat generation, cleaning, and adjusting the gap of the sealing ring.
9. The bearing itself is damaged and heats up. Replace the bearing.
The above is the answer to the question of what temperature the angular contact ball bearing is suitable for. If the angular contact ball bearing clearance is too small, it is prone to heat generation. If it is operated in a high temperature and high-speed environment for a long time, the bearing may be locked. TEDIN produces various types of angular contact ball bearings and cooperates with famous foreign steel companies to use high-quality bearing steel raw materials, which greatly extends the service life of the bearings. You are welcome to contact us for inquiries.
Please check the Product Guide to select suitable bearings for your machinery.
Check more types of Angular Contact Ball Bearings!
E-mail: sales@tedin-bearing.com