The introduction of hydrostatic bearing

Hydrostatic bearing is different with general bearing, its production process, the bearing material is different with general bearing, we described in detail.


We details from several aspects SKF Roller Bearing .



By an external oil supply pressure, the oil film bearing static pressure bearing, achieve liquid sliding bearing lubrication. Hydrostatic bearing from start to stop work under liquid lubrication, so there is no wear and tear, long service life, low power, low speed (or even zero) can also be used. In addition, the high precision bearing, rotating the oil film stiffness big, can inhibit the advantages of oil film oscillation, but need special supply pressure tank, high speed high power consumption.


A brief history: in 1862, the French tell girard invention of hydrostatic bearing, points out that the friction coefficient can be as small as 1/500. Published in 1917, British scientists Rayleigh solve the carrying capacity of the hydrostatic thrust bearing, flow and friction torque equation. In 1938, the application of hydrostatic bearing in large astronomical telescope, with 500 tons, the total weight per rotation week, day and night driving power only 1/12 horsepower. In 1948 France began to liquid hydrostatic bearing is used for grinding machine. Modern hydrostatic bearing has been successfully used for heavy duty, high precision and efficiency of machines and equipment.


Categories: static pressure bearing radial bearing, thrust bearing and radial thrust bearing. The oil supply pressure constant, the flow rate constant of the two systems. Constant oil pressure system is relatively commonly used.


Function: supply pressure constant static pressure bearing system, and oil supply pressure constant hydrostatic bearing and the bearing structure of the system. External supply pressure oil through compensation elements from the oil supply pressure oil cavity pressure drop, after through the clearance between shaft ring and oil seal oil cavity pressure drop on the surface of the environment pressure. Most of the bearing axis is not affected by external force, the Wall Street journal and the bearing holes concentric, clearance of each oil cavity are equal, flow, pressure, referred to as the state of design. From external shaft axis displacement, the average time interval of each oil cavity flow, pressure change, then the bearing force and the oil chamber of the oil film force vector and phase equilibrium. Compensating element automatically adjust action oil cavity pressure and flow compensation, its compensation performance affect the bearing capacity, oil film rigidity, etc. The elements in the system of compensation for oil pressure constant, called suffocation, and capillary pore blocking suffocation throttle valve throttle device, movies, and so on. The elements in the system of compensation for oil flow rate constant and quantitative pump and valve compensation elements, bearing load - displacement performance is different also, due to the rotation axis, the fluid dynamic pressure bearing oil seal, improve the bearing capacity. This phenomenon is called dynamic pressure effect, the higher the speed, the dynamic pressure effect is significant.


The wide application of hydrostatic bearing in daily modernization of industrial and agricultural production has played a very important role.