Hydrostatic bearing advantages

A type of hydrostatic bearing, sliding bearing, is a sliding bearing that uses a pressure pump to force pressure lubricant into a small gap between the bearing and the shaft. It belongs to one type of fully fluid lubricated bearing in terms of lubrication properties, non-fully fluid-lubricated sliding bearing, completely fluid-lubricated sliding bearing, and non-lubricated sliding bearing. Another completely fluid lubricated bearing is a dynamic pressure bearing, which is characterized in any axis. The rotational speed has a high rotational accuracy and high load carrying capacity, but the disadvantage compared to the dynamic pressure bearing is the need for a complete external oil pump system.

According to the type of lubricant can be divided into two categories, a class of hydrostatic bearings, the main use of oil as lubricants, and the other is the gas hydrostatic bearings, the use of gas as a lubricant, mainly the use of air as a lubricant Agents, the use of many hydrostatic bearings, the use of air hydrostatic bearings to teach small. It is mainly used in very high speed mechanisms such as gyroscopes. The structural lubrication system consists of a fuel tank, a lubrication pump, a filter, an overflow valve, a safety valve, an accumulator, a throttle, an oil chamber, an oil seal, and the like. The scope of use is in the field where it is often necessary to operate at low speeds and require high load carrying capacity, high rotation accuracy, and high rotational speed. Such as various heavy machine tools, and high-precision machine tools. The advantages of hydrostatic bearings are:

1. The friction pair is separated by pressure oil film during start-up and operation. The sliding resistance only comes from fluid viscosity, small friction factor and long working life.

2. Hydrostatic bearings have the effect of "homogenization" errors, which can reduce the impact of manufacturing inaccuracies. Therefore, the requirements for manufacturing accuracy are lower than that of dynamic pressure bearings.

3. The pressure on the surface of the friction pair is relatively uniform, and the reliability and life of the bearing are higher.

4. Accurately obtain the desired bearing performance.

5. The temperature distribution of the bearing is relatively uniform, and the thermal expansion problem is not as severe as the dynamic pressure bearing. Hydrostatic bearings accommodate a wide range of operating conditions, from static instruments with loads ranging from gages to heavy equipment with loads up to several thousand tons.