Rolling mill bearing characteristics and maintenance

Rolling mill bearing features and maintenance:


First, the bearing characteristics of the rolling mill:

1. The roller and the raceway are in line contact or repaired line contact, and have large radial load carrying capacity, and are suitable for bearing heavy load and impact load. The friction coefficient is small, suitable for high speed, and the limit speed is close to the deep groove ball bearing.

2, can be moved axially, can adapt to the change of the relative position of the shaft and the shell caused by thermal expansion or installation error, can be used as a free end support.

3. The processing requirements for the shaft or the seat hole are relatively high. After the bearing is installed, the relative deflection of the outer ring axis should be strictly controlled to avoid contact stress concentration.

4. The inner or outer ring can be separated for easy installation and disassembly.

5, steel stamping cage, for high-speed bearings or bearings that require smooth operation, use a physical cage. Depending on the application and the user's requirements, cages with fiberglass reinforced plastics can also be designed and supplied.

Second, the maintenance, overhaul and abnormal treatment of rolling mill bearings:

1. In order to maintain the original performance of the bearing in a good condition for as long as possible, it is necessary to maintain, repair, and prevent accidents, ensure the reliability of operation, and improve productivity and economy.

2, the maintenance of the best working conditions corresponding to the mechanical operating conditions, regular. The content includes monitoring of operating conditions, replenishment or replacement of lubricants, and periodic disassembly inspections. Valve imported pump industrial washing machine

3. As a maintenance item in operation, there are bearing rotation sound, vibration, temperature, lubricant status, and the like.

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Maintenance and overhaul of imported bearings

Maintenance of imported bearings

In order to maintain the original performance of the imported bearings in good condition for as long as possible, maintenance, overhaul, and accident prevention are required to ensure the reliability of operation and improve productivity and economy. Maintenance is best carried out on a regular basis in accordance with the operating standards for the mechanical operating conditions. The content includes monitoring of operating conditions, replenishment or replacement of lubricants, and periodic disassembly inspections. As a maintenance item in operation, there are rotary sounds, vibration, temperature, and state of lubricant of the imported bearings.
Inspection of imported bearings

Cleaning of imported bearings: When disassembling the imported bearings for inspection, first record the appearance of the imported bearings, confirm the residual amount of lubricant, and after sampling the lubricant for inspection, wash the bearings. As a cleaning agent, gasoline and kerosene are commonly used. The cleaning of the removed imported bearings is divided into coarse cleaning and fine cleaning, respectively placed in the container, first placed on the bottom of the metal mesh, so that the imported bearings do not directly contact the dirt of the container. During rough cleaning, if the imported bearing is rotated with dirt, it will damage the rolling surface of the imported bearing and should be noted. In the rough cleaning oil, use a brush to remove the grease and the adhesive. After it is almost clean, it is transferred to the fine wash. Fine washing is to carefully clean the imported bearings while rotating in the cleaning oil. In addition, the cleaning oil should always be kept clean.

Inspection and judgment of imported bearings: In order to judge whether the removed imported bearings can be used, it is necessary to check after the imported bearings are cleaned. Check the raceway surface, the rolling surface, the state of the mating surface, the wear of the cage, the increase in the clearance of the imported bearing, and the damage and abnormality that are irrelevant in dimensional accuracy. For non-separating small ball bearings, use one hand to support the inner ring and rotate the outer ring to check if it is smooth. Separate imported bearings such as tapered roller bearings can be inspected separately for the rolling surfaces of the rolling elements and the outer ring. Large imported bearings cannot be rotated by hand

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