YOCH Bearing

The critical speed of a steam turbine refers to the maximum speed that the rotor can withstand. When it reaches a certain value, the vibration will reach a certain level and cause a state of torsional vibration. Understanding critical speed is critical to the design, operation and maintenance of steam turbines. The calculation and control of critical speed directly affect the safety, stability and operating efficiency of steam turbine.

Raw material preparation The first step in sliding bearing processing is to select suitable raw materials. Steel materials are usually used, such as high carbon steel, low carbon steel, etc. When selecting materials, you need to consider the load, friction, wear and other factors that the bearing will bear to select appropriate materials.

Stainless steel has the ability to resist atmospheric oxidation---that is, stainless steel, and also has the ability to resist corrosion in media containing acids, alkali, and salt---that is, corrosion resistance. However, its corrosion resistance changes with the chemical composition of the steel itself, its additive state, usage conditions and environmental medium types. Like 304 steel pipes, in the atmosphere of dry cleansing, absolute good resistant to tarnishing ability is arranged. But if it is moved to riviera, in containing the sea fog of a large amount of salts, will soon get rusty; 316 steel pipes show excellent corrosion resistance. good. Therefore, not any kind of stainless steel can resist corrosion and rust in any environment.

Bearings are key components in mechanical operation, and their material selection directly affects their performance. In different fields, the bearing materials used are also different. The following is a detailed analysis of the classification and performance requirements of commonly used bearing materials.

The choice of housing material should be based on specific application requirements and working environment.

 The performance of preventing adhesion and boundary lubrication when the shaft diameter is in direct contact with the bearing bush. The material factors that affect the friction compatibility of the friction pair

The performance of preventing adhesion and boundary lubrication when the shaft diameter is in direct contact with the bearing bush. The material factors that affect the friction compatibility of the friction pair are:

Fault phenomenon: After the automatic oil pump, if pure liquid lubrication has been established, it should generally be able to rotate easily by hand; if it cannot rotate or is more difficult to rotate than when no oil is supplied, it means that pure liquid lubrication has not been established.

Mechanical polishing Mechanical polishing is a polishing method that relies on cutting and plastic deformation of the material surface to remove the polished convex parts to obtain a smooth surface. Generally, oilstone strips, wool wheels, sandpaper, etc. are used. Mainly manual operations, special parts such as rotary bodies For the surface, auxiliary tools such as turntables can be used. For those with high surface quality requirements, ultra-precision grinding and polishing can be used. Super-precision polishing uses special abrasives, which are pressed against the surface of the workpiece to be processed in a polishing fluid containing abrasives to perform high-speed rotation. This technology can achieve a surface roughness of Ra0.008μm, which is the highest among various polishing methods. This method is often used for optical lens molds.