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Protective bearing seat of magnetic suspension bearing and protective bearing mounting structure

A technology for magnetic suspension bearings and bearing protection, applied in the direction of magnetic bearings, rigid supports of bearing components, bearings, etc., can solve problems such as permanent deformation, low positioning accuracy of tolerance rings, and increased assembly difficulty

Pending Publication Date: 2021-11-26
PINGGAO GRP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, since the tolerance ring is usually pressed from a thin spring steel plate, there are some disadvantages in use
First of all, due to the limitation of structural space and product type spectrum, there is little room for adjustment of its stiffness and damping characteristics, so it can only play a role in a limited range; secondly, the positioning accuracy of the tolerance ring is low, especially when forming a ring Near the formed seam; again, due to its corrugated structure, the stiffness and damping provided by the tolerance ring is highly nonlinear and directly related to the preload, in order to obtain a high initial stiffness, it needs to be used when installing Higher pre-compression force increases the difficulty of assembly; finally, when the drop impact is large, the protrusion of the tolerance ring is easily squeezed to produce permanent deformation, which further affects the positioning accuracy of the protective bearing

Method used

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  • Protective bearing seat of magnetic suspension bearing and protective bearing mounting structure
  • Protective bearing seat of magnetic suspension bearing and protective bearing mounting structure

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Experimental program
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Effect test

Embodiment 1

[0066] Such as figure 1 As shown, the protective bearing installation structure of the magnetic suspension bearing includes a protective bearing seat, and a protective bearing 31 is mounted on the protective bearing seat. The protective bearing 31 in this embodiment is a double-row angular contact ball bearing.

[0067] The protective bearing seat of the magnetic suspension bearing includes a seat main body 11 and a gland 21. The seat main body 11 is a disc structure, with a sunken platform 12 in the middle, and a bearing installation hole 13 is provided on the sunken platform 12 to provide installation space for the protective bearing 31. . The gland 21 is an annular pressure plate, fastened to the end corresponding to the bearing installation hole 13, fixed on the end surface of the seat main body 11 by screws 22, used to form the axial positioning of the protective bearing 31, and provide the required pre-positioning for the angular contact bearing. Tight force. The seat ...

Embodiment 2

[0073] The difference between this embodiment and Embodiment 1 is that in this embodiment, rubber is filled in the groove 15 formed between two adjacent elastic cantilevers 14 as an elastic filling material, which is used for pressing by the elastic cantilever 14. When elastic compression deformation occurs, the damping can be further enhanced. Of course, the specific material and filling amount of the elastic filling material can be designed according to needs, for example, resin material can also be used in other embodiments.

Embodiment 3

[0075] The difference between this embodiment and Embodiment 1 is that in Embodiment 1, the support surface 17 on the bearing support portion 16 for supporting the outer peripheral surface of the outer ring of the protective bearing 31 is a plane, while in this embodiment, the bearing The support surface 17 on the support portion 16 that supports the outer peripheral surface of the outer ring of the protection bearing 31 is an arc-shaped concave surface.

[0076] In other embodiments, the supporting surface 17 on the bearing supporting portion 16 may also be in other shapes, such as an arc-shaped convex surface.

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Abstract

The invention relates to a protective bearing seat of a magnetic suspension bearing and a protective bearing mounting structure. The protective bearing seat of the magnetic suspension bearing comprises a bearing mounting hole used for providing a mounting space for a protective bearing; an elastic cantilever is arranged on the hole wall of the bearing mounting hole, or an annular buffer piece is fixed in the bearing mounting hole, and elastic cantilevers are arranged on the annular buffer piece; the elastic cantilevers are uniformly distributed around the axis of the bearing mounting hole; each elastic cantilever obliquely overhangs relative to the radial direction of the bearing mounting hole and is provided with a bearing supporting part for supporting the peripheral surface of the outer ring of the protective bearing, and a gap is formed between each bearing supporting part and the root part of each elastic cantilever; and the elastic cantilevers are bent and deformed when being pressed by the protective bearing so as to buffer the protective bearing. According to the protective bearing seat of the magnetic suspension bearing and the protective bearing mounting structure, different buffering requirements can be flexibly met, the structural universality is higher, the machining precision and the structural uniformity can be better guaranteed, and therefore the positioning precision is improved, the nonlinear characteristic is small, and the assembling is convenient.

Description

technical field [0001] The invention relates to a protective bearing seat and a protective bearing installation structure of a magnetic suspension bearing. Background technique [0002] The protective bearing of the magnetic suspension bearing (hereinafter referred to as "magnetic bearing") is the mechanical boundary where the stator and rotor touch when the support of the magnetic bearing does not work or fails for some reason. This is an additional set of passive bearings, usually used There are more precision angular contact ball bearings, deep groove ball bearings and so on. [0003] When the magnetic bearing equipment operating under rated conditions fails, the protective bearing in the equipment should be able to withstand the fall of the rotor running at full speed, and support the rotor for a limited time until it returns to normal operating conditions, or until it is safely reduced. A large number of practical and theoretical analyzes have shown that the protective...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16C27/00F16C27/06F16C32/04
CPCF16C27/00F16C27/06F16C32/0406
Inventor 徐旸田刚领张剀张兴戴兴建张柳丽阮鹏崔美琨白亚平
Owner PINGGAO GRP