Semi-active hydrostatic bearing device lubricated by magnetorheological fluid

Abstract

The invention discloses a magnetorheological fluid lubricated semi-active hydrostatic bearing device, which comprises a transmission shaft (1), an excitation system (2), a hydrostatic bearing (3) and a plurality of eddy current displacement sensors (4), the transmission shaft (1) is lubricated and supported by the hydrostatic bearing (3), and the excitation system (2) is radially arranged outside the hydrostatic bearing (3). The eddy current displacement sensor (4) detects the position information of the transmission shaft (1) relative to the hydrostatic bearing (3) in real time; according to the semi-active hydrostatic bearing, the rheological parameters of the magnetorheological fluid can be rapidly changed by changing the magnitude of the input current of the excitation system, so that the semi-active hydrostatic bearing can adapt to more complex and variable working conditions.

Description

technical field [0001] The invention relates to the design field of static pressure bearings, in particular to a semi-active static pressure bearing device lubricated by magneto-rheological fluid. Background technique [0002] The hydrostatic bearing belongs to the sliding bearing, and the lubricant is sent into the tiny radial gap between the shaft and the bearing through the hydraulic system to ensure that the shaft is in a state of complete fluid lubrication, thereby reducing friction and wear. Therefore, hydrostatic bearings are often used in low-speed, high-carrying capacity, high-rotation precision and high-speed applications, such as heavy-duty machine tools and high-precision machine tools. [0003] As machine tools continue to develop towards high precision, the performance requirements for hydrostatic bearings are also getting higher and higher. Under extreme processing conditions such as ultra-precision heavy-duty hard turning and hard milling, the dynamic perfor...

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