The choice of the restrictor of the restrictor determines the performance of the hydrostatic guide rail. It determines the stiffness of the rail oil film. When the guide rail is subjected to an external load, the pressure of the oil chamber changes to balance the external load. Due to the different forms of the restrictor, the flow rate of the oil chamber varies. When the flow rate increase rate dq/q is equal to the load increase rate dP/p. That is: the dP/P=dq/q rail has an infinite oil film stiffness. If the flow rate increase rate is less than the load increase rate, the rail oil film stiffness is poor. The relationship between the flow rate and pressure of the oil chamber for several different types of throttling bearings after loading. It is shown from the figure that the oil film of these throttling forms is the highest in the double-sided film, followed by the quantitative oil supply type, and the small hole and the capillary again. The relationship between the flow rate and the pressure of several different throttled hydrostatic bearings in the oil chamber after loading is structurally simple, and the orifice is the simplest, followed by the capillary. Again, it is a film type, and the spool type is the most complicated. In practical use, the throttle has infinite stiffness in the design state, but the oil film stiffness is not necessarily infinite under load conditions. Due to the error in manufacturing, the error caused by the assumption in the theoretical calculation, the actual performance of the guide rail and The theoretical values â€‹â€‹will also vary, and the more complex the structure of the throttle, the greater the difference. The parameters of the guide rail and the structural parameters of the throttle path are directly related to the bearing capacity of the guide rail and the stiffness of the oil film. If the throttler parameters are not properly selected, even if the throttle form can theoretically obtain infinite stiffness, it cannot be realized in practice. A poorly-stated throttling form selects the appropriate parameters and achieves better performance. The pressure of the hydrostatic guide has a close relationship with the performance of P0 and the bearing capacity of the guide rail and the stiffness of the oil film.
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