Bearing noise is an important source of pollution for the environment, and it is also an important indicator for the bearing industry to control. The noise limit of angular contact ball bearings for home appliances, office machinery and instrumentation is more prominent. The bearing noise has many influencing factors and is very complicated. It needs to be analyzed from the overall design of the bearing, the inner ring, the outer ring, the cage, the rolling element and the lubricating oil (fat). The materials, equipment, and materials used in each part of the ball bearing are analyzed and studied. This is the basic content of bearing noise technology.
Causes and Preventive Measures for Rolling Bearing Corrosion Rolling bearing corrosion is caused by various internal and external factors. The main ones are:
1. Metal surface finish (poor oxygen concentration, battery corrosion).
2. The chemical composition and structure of the metal material itself.
3. The composition and pH of the solution in contact with the metal surface;
4. Ambient temperature and humidity.
5. Various environmental media in contact with metal surfaces.
6. In addition, human sweat is also responsible for the corrosion of angular contact ball bearings. Its pH is 5-6. Therefore, in order to prevent rust caused by hand sweat, the installation and production personnel should wear gloves, do not touch the rolling bearing by hand.
Apply anti-rust oil to prevent rolling bearing from rusting
1. Immersion method: Some small rolling bearings are immersed in anti-rust grease. The thickness of the oil film can be achieved by controlling the temperature or viscosity of the anti-rust grease. A method of adhering an upper layer of rust preventive grease to the surface thereof.
2. Brushing method: Pay evenly on the surface of the rolling bearing when brushing, do not accumulate, and pay attention to prevent leakage.
3. Spray method: Some large-scale anti-rust materials are not suitable for oiling by immersion method. Generally, the compressed air with a pressure of about 0.7Mpa is sprayed in the air cleaning place. The spray method is suitable for solvent-diluted rust preventive oil or thin layer rust preventive oil. This method must use sound fire protection and labor protection measures.
