What Is a Hydrostatic Bearing?

A type of hydrostatic bearing sliding bearing is a sliding bearing that uses a pressure pump to force the pressure lubricant into the small gap between the bearing and the shaft.

Hydrostatic bearings,

With static lubrication

1. During startup and operation

The range of use is for areas that often need to run at low speeds but require high load carrying capacity, high precision in rotation, and high speeds. Such as various heavy-duty machine tools, as well as high-precision machine tools ^[3]

As the machine develops in a highly efficient and precise direction, hydrostatic bearing technology also faces challenges. For hydrostatic bearings, the effect of temperature is severe. Take cooling measures. The design should consider the change of bearing clearance due to the difference of the material's thermal expansion coefficient. By further improving the structure of the main shaft of the grinding machine, the grinding accuracy can be further improved by using the appropriate number of oil chambers and parameters.

In order to further improve the dynamic rigidity of the shafting system, the hydrostatic bearing of the machine tool is developing in the direction of increasing the oil supply pressure so as to be suitable for the needs of roughing and finishing. For static pressure spindles working under high speed and heavy load, the effects of dynamic pressure effect, thermal effect, squeeze film effect, oil compressibility effect, and elastic deformation of the shaft and bearing must be considered comprehensively. The standardization, series design and sale of general-purpose hydrostatic bearings are the hallmarks of mature hydrostatic technology. Grinding machine static pressure spindle standardization, serial design, etc. All these indicate that the development of China's static pressure technology has entered a new stage ^[1] .