Centripetal thrust protection bearing device for automatically eliminating clearance

Abstract

The invention discloses a centripetal thrust protection bearing device for automatically eliminating a protection clearance in a magnetic suspension bearing system. The centripetal thrust protection bearing device comprises a rotary shaft, a rotor assembly, a sliding block, an installation seat and a bearing seat, wherein two angular contact ball bearings are arranged between inner cavities of the installation seat and the bearing seat; the sliding block comprises more than two sliding block sub-bodies; each sliding block sub-body is arranged in a sliding block guide groove through a sliding rod; all the sliding rods are connected into a whole through an annular connecting piece; waist-shaped holes are formed in positions, corresponding to the sliding rods, on the annular connecting piece; at least one sliding block sub-body is provided with a sliding block retaining device; a proper axial clearance is formed between the rotary shaft and the installation seat. Therefore, the device can protect a rotor in the radial and axial directions when the magnetic suspension bearing system fails and the rotor drops, and a radial clearance between the rotary assembly and a rolling bearing can be eliminated, so that vibration and impact on the rolling bearing after the high-speed rotor drops are eliminated, and the reliability and the safety of a centripetal thrust protection bearing are improved.

Description

Technical field [0001] The invention relates to a centripetal thrust protective bearing device that automatically eliminates gaps, which provides protection to the radial and axial directions of the rotor after the magnetic suspension bearing rotor falls, and the centripetal thrust protective bearing can automatically eliminate the protective bearing after the rotor falls Repeated collisions and impacts, especially a centripetal thrust protective bearing suitable for bearing radial load and axial load at the same time in high-speed magnetic bearing system, belongs to the field of magnetic bearing system. Background technique [0002] In the magnetic suspension bearing system, a set of protective bearings (also called auxiliary bearings, spare bearings, retaining bearings or emergency bearings) is generally required as a temporary support in the event of system power failure, overload, control system failure or failure. The centripetal thrust protection bearing can bear the load a...

AI Technical Summary

Problems solved by technology

At present, there is a method that spreads small rolling bearings on the circumference of the rotor, and after the rotor assembly falls, the movement of the small rolling bearings around it can eliminate the gap, but its structure is very complicated, and because the diameter of the rotor is much larger than that of the surrounding rolling bearings, As a result, the rotational speed of the circumferential small rolling bearing is much greater than its own limit rotational speed after the fall; and this kind of protective bearing device cannot provide axial protection for the fallen rotor, and does not fundamentally solve the problem

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