Introduction To High Temperature Bearings

1、 Material requirements
Bearings used in high-temperature environments must first be made of materials that can withstand the effects of high temperatures and ensure good wear and corrosion resistance.
1. Metal materials: high temperature environment has a great impact on traditional metal materials, such as large coefficient of thermal expansion, poor corrosion resistance, etc. Therefore, the material selection of high-temperature bearings needs to be achieved through special modified materials, such as high-temperature wear-resistant alloy steel, high-temperature stainless steel, high-temperature alloys, etc.
2. Non metallic materials: With the continuous development and maturity of polymer composite materials, high-temperature bearings are gradually made of non-metallic materials, such as ceramic materials, high-temperature fiber materials, etc.
In summary, the material selection of high-temperature bearings needs to be comprehensively considered based on factors such as the temperature range, short-term/long-term working time, and working environment in order to select the most suitable material.
2、 Structural requirements
When designing the structure of high-temperature bearings, various factors need to be considered, such as internal air circulation, bearing sealing, bearing base heat dissipation, bearing inner wall lubrication, etc.
1. Internal air circulation: In high-temperature environments, the internal temperature of the bearing device is high, the humidity is low, and the dust content is high. In order to ensure the service life and stability of bearings, it is necessary to adopt appropriate internal air circulation design to prevent damage to bearings caused by high temperatures and dust.
2. Bearing sealing: High temperature bearings are easily affected by atmospheric components such as dust, water vapor, and oxygen during operation. Without a good sealing design, it is easy to cause internal damage to the bearings. Therefore, high-temperature bearings must be equipped with suitable bearing sealing devices to isolate the bearings from the environment.
3. Heat dissipation of bearing base: High temperature bearings can easily cause overheating of the bearing base under continuous high temperature working conditions, affecting the stability and lifespan of the bearings. Therefore, high-temperature bearings require the use of appropriate bearing base heat dissipation processes to dissipate the heat generated by the bearing base.
4. Bearing inner wall lubrication: In high-temperature environments, the lubrication of the bearing inner wall is also a relatively troublesome problem. Because many traditional lubricating materials are prone to decomposition, oxidation, or burning in high-temperature environments, the lubrication method for high-temperature bearings requires more suitable lubrication methods, such as using high-temperature grease or liquid lubricants.
3、 Processing requirements
During the processing of high-temperature bearings, the requirements for processing technology are also stricter than ordinary bearings.
1. Accuracy requirements: When high-temperature bearings work in high-temperature environments, they not only need to withstand the influence of high temperatures, but also ensure high-speed and stable operation. Therefore, the machining accuracy requirements of high-temperature bearings are higher than traditional bearings, and the accuracy and coordination of each component must be ensured during machining to prevent bearing failure caused by errors.
2. Surface treatment: The surface treatment of high-temperature bearings is also very important. Due to the influence of high temperature environment, the surface of bearings is easily affected by factors such as oxidation, corrosion, and wear. Therefore, it is necessary to carry out appropriate treatment on the bearing surface during the machining process, such as electroplating treatment, spraying treatment, etc.
3. Coating requirements: Coating is an important component of high-temperature bearings, which can play a role in anti-corrosion, oxidation resistance, wear resistance, and other aspects. Therefore, the selection of coatings and coating process are also key factors. When selecting a coating, it is necessary to comprehensively consider various factors such as adhesion, corrosion resistance, wear resistance, and high temperature resistance of the coating.
In summary, the product requirements for high-temperature bearings are very high, and their material, structure, and processing technology are all crucial. The wear resistance, corrosion resistance, precision stability, and high-speed performance of high-temperature bearings are also higher than ordinary bearings. Only by achieving the utmost in all aspects can the manufacturing and application of high-temperature bearings be completed.