Hydrostatic guideways with magnetorheological fluid dampers

Abstract

The invention discloses a liquid static pressure guide rail provided with a magnetorheological damper. A sliding block is arranged on the guide rail in a sliding manner; the magnetorheological damper is arranged inside the sliding block; a support block is respectively arranged at the front and rear ends of the guide rail; a piston rod is coaxially arranged in the installation holes in the two support blocks and penetrates through the magnetorheological damper; a linear motor secondary level is arranged in the middle part of the sliding block; a linear motor primary level is arranged in the middle part of the guide rail; the linear motor secondary level and the linear motor primary level are in surface contact; magnetic insulation materials are respectively cushioned in grooves of the sliding block and the guide rail; an inner cavity of the magnetorheological damper is filled with magnetorheological fluid; a piston is arranged on the circumferential surface of a piston rod in the inner wall of a cylinder body in a sleeving manner; an annular clearance is formed between the piston and the inner wall of the cylinder body; an electromagnetic coil surrounds the piston surface and is externally connected with a control mechanism. According to the liquid static pressure guide rail, the damping in the feeding direction of the guide rail is adjustable, the adjustment speed is fast, the control accuracy is high and the rigidity of the guide rail is good.

Description

technical field [0001] The invention belongs to the technical field of mechanical manufacturing, and relates to a hydrostatic guide rail with a magneto-rheological fluid damper. Background technique [0002] The existing hydrostatic guide rail generally consists of a hydraulic oil supply device, a power drive device, a guide rail, a slide block, and a hydrostatic oil chamber. When the guide rail is working, the hydraulic oil supply device firstly inputs the pressure oil into the static pressure oil chamber, and under the action of the pressure oil, the slider is lifted from the guide rail, so that a layer of liquid film is filled between the slider and the guide rail. The contact state between the guide rail and the slider is changed from sliding friction to pure liquid friction, which greatly reduces the frictional resistance when the slider moves. At the same time, the hydrostatic guideway also has the advantages of large bearing capacity, excellent vibration absorption p...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a hydrostatic guide rail with a magneto-rheological fluid damper, which solves the problem that the damping in the feed direction of the hydrostatic guide rail in the prior art is small, resulting in excessive overshoot of the feed movement of the machine tool and The problem of long steady state adjustment time

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