Interference protection device for bearing of magnetic suspension generator

Abstract

The utility model belongs to the technical field of magnetic suspension equipment protection bearings, and particularly relates to an interference protection device for a magnetic suspension generator bearing, which comprises a main shaft, a first step arranged on the main shaft, an angular contact bearing sleeved on the outer side of the main shaft, and two semicircular rings combined together and mounted on the first step in a matched manner, the limiting part is used for limiting the position of the angular contact bearing; and the limiting structure sleeves the outer side of the semi-circular ring in an interference manner and is used for preventing the semi-circular ring from generating radial movement, a gap is reserved between the limiting structure and the shaft end, and the gap is used for placing a permanent magnet for a Hall. Compared with a traditional bearing protection structure using a shaft end pressing device, the bearing protection structure replaces the original shaft end pressing device by introducing the design that the limiting structure is sleeved on the outer side of the protection structure in an interference mode, the size of the whole structure is greatly reduced, and necessary space is provided for installation of a permanent magnet for Hall and other key components.

Description

Technical Field

[0001] The utility model belongs to the technical field of magnetic suspension equipment bearing protection, in particular to an interference protection device for a magnetic suspension generator bearing. 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 existing protective bearing structure uses 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 shaft end clamping device, but the shaft end clamping device of the spacer ring often occupies a large volume, which is not conducive to placing the Hall permanent magnet behind the protective bearing structure.

[0004] Therefore, there is an urgent need for an interference protection device for a magnetic levitation generator bearing to solve the above technical problems. Utility Model Content

[0005] The purpose of the utility model is to provide an interference protection device for a magnetic suspension generator bearing to solve the above problem.

[0006] To achieve the above purpose, the present invention provides the following solutions:

[0007] An interference protection device for a magnetic levitation generator bearing comprises a main shaft, a first step is provided on the main shaft, an angular contact bearing is sleeved on the outer side of the main shaft, and further comprises

[0008] Two semicircular rings, the two semicircular rings are assembled together and mounted on the first step to limit the position of the angular contact bearing;

[0009] A limiting structure is interference-fitted on the outside of the semicircular ring to prevent the semicircular ring from moving radially. A gap is left between the limiting structure and the shaft end, and the gap is used to place a Hall permanent magnet.

[0010] Preferably, a circular groove is provided on the first step, and the semicircular ring is clamped in the circular groove.

[0011] Preferably, the inner diameter of the semicircular ring is larger than the outer diameter of the annular groove.

[0012] Preferably, the limiting structure includes a retaining ring, and the retaining ring is interference-fitted on the outer side of the semicircular ring.

[0013] Preferably, the gap between the end surface of the retaining ring close to the angular contact bearing and the inner ring of the angular contact bearing is larger than the gap between the end surface of the semicircular ring close to the angular contact bearing and the inner ring of the angular contact bearing.

[0014] Preferably, a second step is provided on a side of the semicircular ring away from the first step, the second step is opened on the main shaft, a spacer ring is provided in the second step, and the Hall permanent magnet is located between the spacer ring and the shaft end.

[0015] Preferably, a semicircular step surface is provided on one side of the semicircular ring close to the first step, and the semicircular step surface is in contact with the step surface of the first step.

[0016] Compared with the prior art, the present invention has the following advantages and technical effects:

[0017] Compared with the traditional bearing protection structure that uses a shaft end clamping device, the utility model replaces the original shaft end clamping device by introducing a design in which a limiting structure is interference-fitted on the outside of the semicircular ring, greatly reducing the volume of the overall structure, providing the necessary space for the installation of other key components such as Hall permanent magnets, optimizing the internal layout of the generator, and improving the integration. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] 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:

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2 for Figure 1 A magnified view of middle A;

[0021] Figure 3 It is a front sectional view of the utility model;

[0022] Figure 4 for Figure 3 Enlarged view of middle B;

[0023] Figure 5 for Figure 4 Enlarged view of middle C;

[0024] Figure 6 This is the step surface trend diagram of the first step;

[0025] Figure 7 for Figure 4 Schematic diagram of the middle semicircle;

[0026] Among them, 1. Main shaft; 2. Angular contact bearing; 3. Semicircular ring; 4. Retaining ring; 5. Spacer ring; 6. Hall permanent magnet; 7. First step; 8. Second step; 9. Semicircular ring step. DETAILED DESCRIPTION

[0027] 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.

[0028] 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.

[0029] Reference Figures 1 to 7 The utility model discloses an interference protection device for a magnetic levitation generator bearing, comprising a main shaft 1, a first step 7 is provided on the main shaft 1, an angular contact bearing 2 is sleeved on the outer side of the main shaft 1, and further comprising

[0030] Two semicircular rings 3 are assembled and mounted on the first step 7 to limit the position of the angular contact bearing 2;

[0031] The limiting structure is interference-fitted on the outside of the semicircular ring 3 to prevent the semicircular ring 3 from moving radially. A gap is left between the limiting structure and the shaft end, and the gap is used to place the Hall permanent magnet 6.

[0032] Compared with the traditional bearing protection structure using a shaft end clamping device, the utility model replaces the original shaft end clamping device by introducing a design in which a limiting structure is interference-fitted on the outside of the semicircular ring 3, greatly reducing the volume of the overall structure, providing the necessary space for the installation of other key components such as the Hall permanent magnet 6, optimizing the internal layout of the generator, and improving the integration.

[0033] To further optimize the solution, a circular groove is provided on the first step 7, and the semi-circular ring 3 is clamped in the circular groove.

[0034] The semicircular ring 3 is axially positioned by the circular groove, ensuring the precise positioning of the bearing protection structure on the main shaft, avoiding bearing installation problems caused by assembly errors, and improving the reliability and accuracy of the system.

[0035] The height of the steps can be set to different sizes (this is not limited in the present invention), so that the size of the axial magnetic gap can be adjusted by selecting semicircular rings 3 with different step heights.

[0036] According to a further optimization scheme, the inner diameter of the semicircular ring 3 is larger than the outer diameter of the circular groove.

[0037] Such a size setting allows the semicircular ring 3 to slide easily into the circular groove, reducing the resistance during assembly and the need for precise alignment, making installation easier and faster, and reducing assembly difficulty and time cost.

[0038] Furthermore, the setting that the inner diameter is larger than the outer diameter reduces the extrusion or friction on the main shaft 1 and the semicircular ring 3 during the assembly process, protects the surface of the components from damage, extends the service life of the components, and ensures the accuracy of the bearing installation.

[0039] According to a further optimized solution, the limiting structure includes a retaining ring 4 , which is interference-fitted on the outer side of the semicircular ring 3 .

[0040] The interference fit ensures a tight, gap-free connection between retaining ring 4 and semicircular ring 3, maintaining a secure connection even during long-term operation and under dynamic loads. This reduces the risk of failure due to loosening and enhances system reliability. Furthermore, the addition of retaining ring 4 helps evenly distribute the forces acting on semicircular ring 3 in the radial direction, reducing the stress on individual components, extending the service life of each component, and ensuring the durability of the overall structure.

[0041] To further optimize the solution, the gap between the end face of the retaining ring 4 on the side close to the angular contact bearing 2 and the inner ring of the angular contact bearing 2 is larger than the gap between the end face of the semi-circular ring 3 on the side close to the angular contact bearing 2 and the inner ring of the angular contact bearing 2, so as to ensure that the angular contact bearing 2 is always in contact with the second step on the semi-circular ring 3. This arrangement strengthens the interference fit precision of the bearing and ensures the stability and accuracy of the bearing under dynamic working conditions. In addition, this gap layout can provide additional protection for the angular contact bearing 2. Even under extreme working conditions, it can first ensure that the contact between the bearing and the second step remains unchanged, avoiding direct impact or load transfer to the bearing itself, and protecting the bearing from damage.

[0042] As a further optimization solution, a second step 8 is provided on the side of the semicircular ring 3 away from the first step 7. The second step 8 is opened on the main shaft 1. A spacer ring 5 is provided in the second step 8. The Hall permanent magnet 6 is located between the spacer ring 5 and the shaft end.

[0043] A Hall permanent magnet 6 is provided on the side of the spacer ring 5 away from the retaining ring 4. The spacer ring 5 serves as a barrier for the permanent magnet sensor and is made of non-magnetic material to isolate magnetism.

[0044] The integrated structural design can effectively reduce the space occupied by the bearing protection structure, so that the Hall permanent magnet 6 can be installed on the rear side of the bearing protection structure. The Hall permanent magnet 6 is installed close to the bearing, which shortens the sensing distance and can more directly and accurately monitor the speed and rotation state of the main shaft, reducing the error that may be introduced due to the long signal transmission path, and improving the control accuracy and response speed of the system.

[0045] As a further optimization solution, a semicircular step 9 is provided on one side of the semicircular ring 3 close to the first step 7 , and the step surface of the semicircular step 9 is in contact with the step surface of the first step.

[0046] 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.

[0047] 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 determined by the claims of the present invention.

Claims

1. An interference fit protection device for a magnetic levitation generator bearing, comprising a main shaft (1), wherein the main shaft (1) is provided with a first step (7), and an angular contact bearing (2) is sleeved on the outer side of the main shaft (1), characterized in that: Also includes Two semicircular rings (3), the two semicircular rings (3) are mounted together on the first step (7) to limit the position of the angular contact bearing (2); A limiting structure is interference-fitted on the outside of the semicircular ring (3) to prevent the semicircular ring (3) from moving radially, and a gap is left between the limiting structure and the shaft end, and the gap is used to accommodate a Hall permanent magnet (6).

2. The interference protection device for a magnetic levitation generator bearing according to claim 1, characterized in that: The first step (7) is provided with an annular groove, and the semi-circular ring (3) is clamped in the annular groove.

3. The interference protection device for a magnetic levitation generator bearing according to claim 2, characterized in that: The inner diameter of the semicircular ring (3) is larger than the outer diameter of the circular groove.

4. The interference protection device for a magnetic levitation generator bearing according to claim 2, characterized in that: The limiting structure comprises a retaining ring (4), and the retaining ring (4) is interference-fitted on the outside of the semicircular ring (3).

5. The interference protection device for a magnetic levitation generator bearing according to claim 4, characterized in that: The gap between the end face of the retaining ring (4) close to the angular contact bearing (2) and the inner ring of the angular contact bearing (2) is larger than the gap between the end face of the semicircular ring (3) close to the angular contact bearing (2) and the inner ring of the angular contact bearing (2).

6. The interference protection device for a magnetic levitation generator bearing according to claim 4, characterized in that: A second step (8) is provided on a side of the semicircular ring (3) away from the first step (7), the second step (8) is opened on the main shaft (1), a spacer ring (5) is provided in the second step (8), and the Hall permanent magnet (6) is located between the spacer ring (5) and the shaft end.

7. The interference protection device for a magnetic levitation generator bearing according to claim 1, characterized in that: A semicircular step (9) is provided on one side of the semicircular ring (3) close to the first step (7), and the step surface of the semicircular step (9) is in contact with the step surface of the first step (7).

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