Magnetic suspension motor generator protection mechanism

Abstract

The utility model belongs to the technical field of magnetic suspension equipment protection bearings, and particularly relates to a magnetic suspension motor generator protection mechanism, which comprises two contact bearings arranged on a rotating shaft, and a gap is reserved between the two contact bearings which are arranged along the axial direction of the rotating shaft; and the double-gasket protection structure is arranged on the rotating shaft and located in the gap between the two contact bearings, the double-gasket protection structure makes contact with the side walls, close to each other, of the two contact bearings, and the double-gasket protection structure is used for transmitting impact force generated when the state of the rotating shaft changes to the contact bearings. According to the utility model, the double-gasket protection structure can absorb the generated impact force and transmit the impact force to the contact bearing when the rotor is unstable or falls down at a reduced speed, so that the speed of the rotor is reduced, and the purpose of protecting the magnetic bearing from being damaged is achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of magnetic suspension equipment protection bearings, in particular to a magnetic suspension electric generator protection mechanism. Background Art

[0002] The magnetic levitation electric generator adopts active magnetic bearings, which have significant advantages over traditional mechanical bearings, such as no contact wear, no oil, low vibration, long life and flexible installation.

[0003] The general protective bearing structure adopts two face-to-face angular contact bearings. The two bearings are in contact. The inner ring at one end protects the shaft from falling on one side by contacting the step on the shaft, and the inner ring at the other end protects the bearing from falling on the other side by contacting the spacer ring. The spacer ring is fixed to the shaft by a clamping device. However, the clamping device of the spacer ring often occupies a large volume, which is not conducive to placing the Hall speed sensor after the protective bearing.

[0004] Therefore, it is necessary to design a magnetic levitation electric generator protection mechanism to solve the above problems. Utility Model Content

[0005] The purpose of the utility model is to provide a magnetic suspension electric generator protection mechanism to solve the above problems, thereby protecting the shaft from falling and saving axial space so that a Hall speed sensor can be added to the shaft end.

[0006] To achieve the above purpose, the present invention provides the following solution: a magnetic levitation electric generator protection mechanism, comprising

[0007] Two contact bearings are provided on the rotating shaft, with a gap left between the two contact bearings and arranged axially along the rotating shaft;

[0008] A double-washer protection structure is arranged on the rotating shaft and located in the gap between the two contact bearings. The double-washer protection structure contacts the side walls of the two contact bearings that are close to each other. The double-washer protection structure is used to transmit the impact force generated when the state of the rotating shaft changes to the contact bearings.

[0009] Preferably, the double-washer protection structure includes a semi-circular washer and a bearing washer, the semi-circular washer and the bearing washer are coaxially arranged on the outside of the rotating shaft, the semi-circular washer is located inside the bearing washer with a gap between the two, and the semi-circular washer and the bearing washer are in contact with the side walls of the two contact bearings that are close to each other.

[0010] Preferably, the cross-section of the semi-circular ring gasket is stepped, and the axial length of the inner ring of the semi-circular ring gasket is greater than the axial length of the outer ring.

[0011] Preferably, a circular groove is circumferentially provided on the outer side wall of the rotating shaft, and the inner ring of the semi-circular ring gasket is located in the circular groove.

[0012] Preferably, the axial length of the inner ring of the semi-circular ring gasket is smaller than the axial length of the circular ring groove.

[0013] Preferably, the axial length of the bearing washer is smaller than the axial length of the outer ring of the semi-circular washer.

[0014] Preferably, the contact bearing is an angular contact bearing.

[0015] Compared with the prior art, the present invention has the following advantages and technical effects:

[0016] The double-washer protection structure provided in the utility model can absorb the impact force generated when the rotor loses stability or falls at a reduced speed, and transmit the impact force to the contact bearing, thereby slowing down the rotor and protecting the magnetic bearing from damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without inventive work:

[0018] Figure 1 It is the overall schematic diagram of the magnetic bearing generator;

[0019] Figure 2 for Figure 1 sectional view of

[0020] Figure 3 for Figure 2 A partial enlarged view of middle A.

[0021] Among them, 1. rotating shaft; 2. contact bearing; 3. semicircular ring washer; 4. bearing washer; 5. pressure ring. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0024] Reference Figures 1 to 3 As shown, the utility model provides a magnetic levitation electric generator protection mechanism, including

[0025] Two contact bearings 2 are provided on the rotating shaft 1, with a gap left between the two contact bearings 2 and arranged axially along the rotating shaft 1;

[0026] The double-washer protection structure is arranged on the rotating shaft 1 and is located in the gap between the two contact bearings 2. The double-washer protection structure contacts the side walls of the two contact bearings 2 that are close to each other. The double-washer protection structure is used to transmit the impact force generated when the state of the rotating shaft 1 changes to the contact bearings 2.

[0027] A further optimized solution is provided, in which the double-washer protection structure includes a semi-circular washer 3 and a bearing washer 4. The semi-circular washer 3 and the bearing washer 4 are coaxially arranged on the outside of the rotating shaft 1. The semi-circular washer 3 is located inside the bearing washer 4 with a gap between the two. The semi-circular washer 3 and the bearing washer 4 are in contact with the side walls of the two contact bearings 2 that are close to each other.

[0028] According to a further optimization scheme, the cross section of the semi-circular ring gasket 3 is stepped, and the axial length of the inner ring of the semi-circular ring gasket 3 is greater than the axial length of the outer ring.

[0029] According to a further optimized solution, a circular groove is provided on the circumferential outer wall of the rotating shaft 1 , and the inner ring of the semi-circular ring gasket 3 is located in the circular groove.

[0030] According to a further optimization scheme, the axial length of the inner ring of the semi-circular ring gasket 3 is smaller than the axial length of the circular ring groove.

[0031] According to a further optimization solution, the axial length of the bearing washer 4 is smaller than the axial length of the outer ring of the semi-circular ring washer 3 .

[0032] According to a further optimization scheme, the contact bearing 2 is an angular contact bearing.

[0033] During assembly, first place a contact bearing 2 close to the rear end cover, place the semi-circular ring washer 3 into the corresponding circular groove on the rotating shaft 1 and close it, then install the bearing washer 4 and the other contact bearing 2, and press the outer ring of the contact bearing 2 with the pressure ring 5. Because the axial length of the bearing washer 4 is smaller than the axial length of the outer ring of the semi-circular ring washer 3 between the two contact bearings 2, the inner rings of the two contact bearings 2 will press the semi-circular ring washer 3.

[0034] When the rotor loses stability or slows down and falls, the left or right end face of the annular groove on the rotating shaft 1 contacts the end face of the semi-annular washer 3. The semi-annular washer 3 transfers the impact force and kinetic energy to the contact bearing 2. The contact bearing 2 bears the impact force of the fall and absorbs the kinetic energy to decelerate the rotor, thereby protecting the magnetic bearing from damage.

[0035] In the description of the present invention, it should be understood that the terms "longitudinal", "transverse", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on the present invention.

[0036] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Without departing from the spirit of the present invention, various modifications and improvements to the technical solutions of the present invention made by ordinary technicians in this field should fall within the scope of protection of the present invention.

Claims

1. A magnetic levitation electric generator protection mechanism, characterized in that: include Two contact bearings (2) are provided on the rotating shaft (1), with a gap left between the two contact bearings (2) and arranged axially along the rotating shaft (1); A double-washer protection structure is provided on the rotating shaft (1) and is located in a gap between the two contact bearings (2). The double-washer protection structure contacts the side walls of the two contact bearings (2) that are close to each other. The double-washer protection structure is used to transmit the impact force generated when the state of the rotating shaft (1) changes to the contact bearings (2).

2. A magnetic levitation electric generator protection mechanism according to claim 1, characterized in that: The double-washer protection structure comprises a semi-circular washer (3) and a bearing washer (4); the semi-circular washer (3) and the bearing washer (4) are coaxially arranged on the outside of the rotating shaft (1); the semi-circular washer (3) is located inside the bearing washer (4) with a gap between the semi-circular washer (3) and the bearing washer (4); the semi-circular washer (3) and the bearing washer (4) are in contact with the side walls of the two contact bearings (2) that are close to each other.

3. A magnetic levitation electric generator protection mechanism according to claim 2, characterized in that: The cross section of the semi-circular ring gasket (3) is stepped, and the axial length of the inner ring of the semi-circular ring gasket (3) is greater than the axial length of the outer ring.

4. A magnetic levitation electric generator protection mechanism according to claim 3, characterized in that: An annular groove is provided in the circumferential direction of the outer wall of the rotating shaft (1), and the inner ring of the semi-circular ring gasket (3) is located in the annular groove.

5. The magnetic levitation motor generator protection mechanism according to claim 4, characterized in that: The axial length of the inner ring of the semi-circular ring washer (3) is smaller than the axial length of the circular ring groove.

6. The magnetic levitation electric generator protection mechanism according to claim 3, characterized in that: The axial length of the bearing washer (4) is smaller than the axial length of the outer ring of the semi-circular washer (3).

7. The magnetic levitation electric generator protection mechanism according to claim 1, characterized in that: The contact bearing (2) is an angular contact bearing.

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