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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.

The turbine generator sealing oil system consists of two independent but interconnected oil circuits on the air side and hydrogen side. The airside and hydrogen side sealing oils simultaneously supply oil to the double-flow annular sealing tiles at both ends of the generator. The return oil from the bearings of the turbine generator set is boosted by the air-side sealing oil pump, and passes through the air-side sealing oil cooler and filter to the air-side oil ring of the double-flow annular sealing shoe at the steam and excitation ends of the generator. The sealing oil pressure is controlled by the leakage of the differential pressure valve. When the hydrogen pressure in the generator changes or the airside sealing oil pressure fluctuates, the differential pressure valve will adjust the airside sealing oil leakage amount to maintain the airside sealing oil pressure. Greater than the hydrogen pressure in the generator 0.085Mpa. The return oil of the airside sealing oil is discharged to the oil return system of the generator support bearing. After the hydrogen side sealing oil is boosted by the hydrogen side sealing oil pump, it passes through the hydrogen side sealing oil cooler and filter, and then is divided into two paths, which pass through the generator steam and excitation end balancing valves to the hydrogen side of the generator steam and excitation sealing tiles. In the oil ring, the function of the steam and excitation balance valve is to track the pressure in the air-side oil ring in the steam and excitation end sealing tiles, and adjust the pressure in the hydrogen-side oil ring in the steam and excitation end sealing tiles so that the difference between the pressure in the air-side oil ring is not greater than ± 50mm water column, the hydrogen side sealing oil returns to the sealing oil tank. The oil level of the sealing oil tank is controlled by replenishing oil at the outlet of the airside sealing oil pump or discharging oil to the inlet of the airside sealing oil pump.

The properties of metal materials are generally divided into two categories: process performance and usage performance. The so-called process performance refers to the performance of metal materials under specified cold and hot processing conditions during the manufacturing process of mechanical parts. The quality of the process performance of metal materials determines its adaptability to processing and forming during the manufacturing process. Due to different processing conditions, the required process properties are also different, such as casting performance, weldability, forgeability, heat treatment performance, cutting processability, etc. The so-called performance refers to the performance of metal materials under the conditions of use of mechanical parts, which includes mechanical properties, physical properties, chemical properties, etc. The performance of metal materials determines its range of use and service life.

Solid lubrication Under some special conditions of use, adding a small amount of solid lubricant to the grease, such as adding 3 to 5% of No. 1 molybdenum disulfide, can reduce wear and improve pressure and heat resistance. For high temperature, elegance, high vacuum, and corrosion resistance , radiation resistance, and extreme low temperature and other special conditions, adding solid lubricants to engineering plastics or powder metallurgy materials can make INA bearing parts with self-lubricating properties. For example, using a binder to bond the solid lubricant to the raceway , the cage and the rolling elements form a lubricating film, which has a certain effect on reducing friction and wear.