Hydrostatic guideway

Abstract

The invention discloses a hydrostatic guideway, and relates to the field of machine tool liquid hydrostatic guideways. The hydrostatic guideway comprises a guideway, a sliding plate and a feedback compensation device, the feedback compensation device comprises a mounting seat and an elastic component, and the sliding plate is arranged on the guideway and provided with a first mounting hole; the mounting seat is arranged in the first mounting hole and forms an oil cavity with the guideway, the mounting seat is provided with a second mounting hole, and the elastic component is arranged in the second mounting hole; the hydrostatic guideway further comprises an annular oil groove which is arranged on the elastic component in a sleeving mode, and an annular gap is formed between the mounting seat and the elastic component. The hydrostatic guideway changes the length of the elastic component through the oil cavity pressure feedback effect to make the height of the gap change, and system flows are compensated to restore the initially designed thickness of an oil film of electrorheological fluid between the guideway and the sliding plate; compared with the prior art, the rigidity of the hydrostatic guideway is improved, and the feedback response speed of the hydrostatic guideway is increased.

Description

technical field [0001] The invention relates to the field of machine tool hydrostatic guide rails, in particular to a static pressure guide rail. Background technique [0002] The hydrostatic guide rail is referred to as the hydraulic guide rail for short. It transports the oil with a certain pressure to the oil cavity on the guide rail surface through the restrictor to form a bearing oil film, which separates the metal surfaces that are in contact with each other, and realizes liquid friction. [0003] Since hydrostatic guide rails can work without wear in a wide range of speeds (including static) and loads, they are widely used in ultra-precision machine tools. For the hydrostatic guide rail of the constant pressure oil supply system, a constant pressure oil pump supplies oil to all the oil chambers of the system at the same time. However, if the oil pump is directly connected to the oil chamber, the hydrostatic guide rail cannot work normally under uneven load distributi...

AI Technical Summary

Problems solved by technology

[0004] Traditional fixed compensation devices usually have capillary restrictors and orifice restrictors, but such compensation devices face the problem of low stiffness; while existing feedback compensation devices generally include film feedback restrictors and slide valves Feedback restrictor, but this kind of restrictor is connected to the oil chamber through a sensitive oil circuit, it is difficult to adjust the thickness of the oil film in a short period of time, and there is a problem of response delay

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