Do you know about static pressure heavy duty linear bearing slide rails?

Static pressure heavy duty linear bearing slide rails working principle
The Static pressure heavy duty linear bearing slide rails work in the same way as hydrostatic bearings. The lubricating oil with a certain pressure is input into the oil chamber on the surface of the guide rail through the throttle device to form an oil bearing film, so that the surface of the guide rail is in a pure liquid friction state.
Advantages of Static pressure heavy duty linear bearing slide rails: the change of the speed of the guide rail has little effect on the thickness of the oil film; the change of the load has little effect on the thickness of the oil film; the liquid friction coefficient is only about 0.005, and the oil film is anti-vibration Good sex.

Disadvantages of Static pressure heavy duty linear bearing slide rails: The structure of the guide rail itself is more complicated; it is necessary to add a set of oil supply system; the cleaning degree of lubricating oil is very high.
Main applications of Static pressure heavy duty linear bearing slide rails: feed motion of precision machine tools and low-speed motion guides
Static pressure heavy duty linear bearing slide rails classification
According to the structure form: open, closed
Heavy duty linear bearing slide rails: The pressure oil enters the oil chamber of the guide rail through the throttle, so that the moving parts float, the rail surface is separated by the oil film, and the oil in the oil chamber continuously flows through the oil seal side. Return to the fuel tank. When the moving rail is subjected to an external load to generate a displacement downward, the gap of the guide rail becomes smaller, the oil return resistance is increased, and the oil pressure in the oil chamber is increased to balance the external load.

Heavy duty linear bearing slide rails: Oil chambers are provided on the upper and lower rail surfaces to withstand two-way external loads to ensure smooth movement of moving parts.
According to the oil supply situation, it can be divided into quantitative static pressure guide rail and constant pressure static pressure guide rail.
Constant Static pressure heavy duty linear bearing slide rails:
It means that the oil pressure ps at the inlet of the throttle is constant, which is the static pressure guide that is currently used more.

Heavy duty linear bearing slide rails
The flow rate of the lubricating oil flowing through the oil chamber is a fixed value. The static duty linear bearing slide rails does not use a throttle, but has a fixed oil pump for each oil chamber. Since the flow rate does not change, as the rail clearance becomes smaller as the external load increases, the oil pressure rises and the load is balanced. The change of the load will only cause a small change in the gap of the guide rail, and thus the stiffness of the oil film is high, but the structure of the static pressure guide is complicated.

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