The reason of temperature rise in cross roller bearing

First, the influence of lubricating oil

1. Lubricating oil quantity

Too little or too much lubricating oil used is likely to cause the temperature to rise, so when in use, it should be in accordance with the requirements of normal work, regular refueling for bearings. High temperature sometimes occurs after the bearing oil is too high, which is mainly due to excessive oil. At this time, the phenomenon is that the temperature continues to rise, after a certain point, it will remain unchanged, and then it will gradually fall.

2. Lubricating oil quality

If the grease added to the cross roller bearing does not meet the requirements or has been polluted, it will cause the temperature to rise. Generally, in this case, we fall into dust in the process of adding grease, resulting in oil pollution, which will directly lead to the deterioration of the internal control oil of the bearing box in China, destroying bearing lubrication and increasing the temperature.

3. The type of grease is not appropriate

In addition, the selection of lubricating oil is not appropriate, it is not easy to form uniform lubricating oil film, so it can not reduce the friction and wear inside the bearing, insufficient lubrication, bearing temperature rise. When different product types of grease mix, maybe we will lead to the development of chemical reactions, resulting in oil caking, deterioration, reduce the lubrication effect.

Therefore, the appropriate grease should be selected, the bearing box and bearing should be cleaned during maintenance, the oil filling pipeline should be checked and opened, and different types of grease should not be mixed with, if other types of grease need to be replaced, the original grease should be cleaned first, and the grease should be added regularly during operation and maintenance, the grease should be properly stored, moisture-proof and dustproof. The reason of temperature rise in cross roller bearing

Two, the impact of cross roller bearing

1. Cross roller bearing clearance is too small, bearing working clearance is too small, because the risk of economic loss of Chinese grease shear friction in the clearance is too large, it will also cause the bearing to heat up. At the same time, the clearance is too small, the oil volume will decrease, and the heat generated by the friction problem will not be taken away, and the temperature rise of the bearing will be further developed and improved. But too large clearance will change the dynamic characteristics of the bearing, resulting in unstable rotor operation. Therefore, we need to select appropriate bearing clearance for different equipment and service conditions.

2. In addition, the cross roller shaft ring seat rotation on the shaft or in the shell will also cause its temperature to rise.

3. Excessive load on the cross roller shaft ring will also cause the temperature to rise.

4. Too tight assembly of cross roller bearings will also lead to a rise in temperature, and if the cross roller bearing isolation block or rolling body is broken and foreign impurities enter the interior, it will also lead to a rise in temperature.

5, bearing wear will also lead to higher temperature, rolling bearing is an important part of a variety of large and small machinery, but because of the crusher and other machinery in the working environment more dust, when some fine dust into the bearing seat at high speed, the bearing seat lubricating oil or grease will deteriorate, poor lubrication, bearing wear. The bearing can continue to operate in the state of wear. Due to the increase of friction, the heat increases, which affects the temperature of the bearing.

Improper installation of bearings is another important reason for bearing heating. Because the installation of Chinese bearings is correct or not, it can directly affect its life and the precision of the main engine, so the installation requires that the center line of the shaft and the bearing hole must coincide. If the bearing is installed incorrectly, the accuracy is low, the bearing has a yaw, and the torque will be generated when it rotates, leading to the bearing heating or wear. In addition, the bearing will also affect the production of different vibration, noise can increase, but also increase the temperature rise.