Novel radial-thrust integrated permanent magnet conical bearing

Abstract

The utility model belongs to the technical field of magnetic bearings, and discloses a novel radial-thrust integrated permanent magnet conical bearing which comprises a magnetic bearing body, a conical magnetic bearing body is arranged on one side of the magnetic bearing body, a rotating shaft is arranged in the magnetic bearing body, and a conical rotating shaft is arranged on the side, close to the conical magnetic bearing body, of the rotating shaft. The conical surface inclination angle of the conical magnetic bearing body is the same as the conical surface inclination angle of the conical rotating shaft; a bearing permanent magnet is arranged on an upper half tile of the magnetic bearing body, a conical part bearing permanent magnet is arranged on an upper half tile of the conical magnetic bearing body, an on-shaft permanent magnet is arranged on the rotating shaft, a conical part on-shaft permanent magnet is arranged on the conical rotating shaft, and the bearing permanent magnet corresponds to the on-shaft permanent magnet. The permanent magnet of the conical part bearing corresponds to the permanent magnet on the conical part shaft; the conical magnetic bearing is simple in structure and ingenious in conception, the defect that an existing magnetic bearing structure and an array mode cannot provide axial thrust can be overcome, and radial force and axial thrust can be provided at the same time through the design of the conical magnetic bearing structure.

Description

Technical Field

[0001] This utility model relates to the field of magnetic bearing technology, specifically a novel radial thrust integrated permanent magnet tapered bearing. Background Technology

[0002] Magnetic bearing technology is an advanced technology that uses magnetic force to support the rotor, keeping it in a state of no physical contact with the stator. This technology has broad application prospects in aerospace, precision machinery, high-speed rotating equipment, medical equipment and other fields. At present, sliding thrust bearings are important components for transmitting thrust in propulsion shaft systems, and magnetic thrust bearings are also gradually being used in many industrial scenarios. However, existing magnetic thrust bearings have complex structures and cannot withstand large thrust and unstable radial forces.

[0003] The patent publication number is CN107104545A, which discloses a tapered magnetic bearing switched reluctance motor and its control method. The motor consists of a switched reluctance motor and two tapered magnetic bearings. The tapered stator is composed of four E-type structures. Each E-type structure has a radial suspension winding wound around the middle tooth and an axial suspension winding wound around the other two teeth, which are connected in series to form a set of axial suspension windings. The armature winding spans the two tapered stators and the reluctance motor stator, forming a total of three-phase armature windings. The rotation control is the same as the traditional switched reluctance motor control method, and the suspension provides bias magnetic flux. The five suspension forces are related to the current of the three-phase armature windings, the current of the four radial suspension windings, and the current of the two axial suspension windings.

[0004] The aforementioned patents still have certain shortcomings. Their bearing structures are complex and cannot utilize axial thrust, making them unsuitable for applications requiring high precision magnetic bearings in precision instruments and equipment such as aerospace. Utility Model Content

[0005] The main technical problem to be solved by this utility model is to provide a novel radial thrust integrated permanent magnet tapered bearing. This bearing has a simple structure and can provide axial thrust, enabling the magnetic bearing to be applied in aerospace, precision machinery and other fields.

[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0007] A novel radial-thrust integrated permanent magnet tapered bearing includes a magnetic bearing body, a tapered magnetic bearing housing on one side of the magnetic bearing body, a rotating shaft inside the magnetic bearing body, and a tapered rotating shaft on the side of the rotating shaft near the tapered magnetic bearing housing. The inclination angle of the tapered surface of the tapered magnetic bearing housing is the same as the inclination angle of the tapered rotating shaft. The upper half of the magnetic bearing body is provided with a bearing permanent magnet, and the upper half of the tapered magnetic bearing housing is provided with a tapered portion of the bearing permanent magnet. The rotating shaft is provided with an on-shaft permanent magnet, and the tapered rotating shaft is provided with a tapered portion of the on-shaft permanent magnet. The bearing permanent magnet and the on-shaft permanent magnet correspond to each other, and the tapered portion of the bearing permanent magnet and the tapered portion of the on-shaft permanent magnet correspond to each other.

[0008] The following are further optimizations of the above technical solution by this utility model:

[0009] The rotating shaft is located concentrically arranged radially around the magnetic bearing body and rotates without contact with the magnetic bearing body.

[0010] Further optimization: The bearing permanent magnets and the shaft permanent magnets are staggered, and the staggered distribution between the permanent magnets is used to provide additional axial force to the shaft.

[0011] Further optimization: The back of both the bearing permanent magnet and the tapered bearing permanent magnet are provided with multiple first mounting holes evenly distributed along the circumference, and a first connecting member is provided in the first mounting hole.

[0012] Further optimization: The bearing permanent magnet is fixedly connected to the magnetic bearing body through the first connector, and the tapered bearing permanent magnet is fixedly connected to the tapered magnetic bearing body through the first connector.

[0013] Further optimization: Both the axial permanent magnet and the tapered portion of the axial permanent magnet are provided with multiple second mounting holes evenly distributed along the circumference on their back sides, and a second connecting member is provided in the second mounting hole.

[0014] Further optimization: The permanent magnet on the shaft is fixedly connected to the rotating shaft through the second connector, and the permanent magnet on the tapered part of the shaft is fixedly connected to the tapered rotating shaft through the second connector.

[0015] Further optimization: The surfaces of the lower half of the magnetic bearing body and the lower half of the tapered magnetic bearing body are covered with aluminum alloy material for magnetic shielding.

[0016] Further optimization: The surfaces of the lower half of the magnetic bearing body and the lower half of the tapered magnetic bearing body are covered with a rubber material for magnetic shielding.

[0017] This utility model adopts the above-mentioned technical solution, which is ingenious and reasonable in structure. The method of setting permanent magnets in the upper half of the magnetic bearing can avoid the defect of the current array method where the magnetic force is opposite in the axial direction, which makes the current magnetic bearing structure almost unable to achieve axial thrust. Through the design of the tapered magnetic bearing structure, it can provide both radial force and axial thrust at the same time, which can meet the needs of aerospace, precision machinery and other fields.

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model.

[0020] In the figure: 1-Magnetic bearing body; 2-Rotating shaft; 3-Conical magnetic bearing body; 4-Conical rotating shaft; 5-Bearing permanent magnet; 6-Conical bearing permanent magnet; 7-Permanent magnet on shaft; 8-Conical permanent magnet on shaft; 9-First connecting piece; 10-Second connecting piece. Detailed Implementation

[0021] Example 1: As Figure 1 As shown: A novel radial-thrust integrated permanent magnet tapered bearing includes a magnetic bearing body 1, a tapered magnetic bearing body 3 on one side of the magnetic bearing body 1, a rotating shaft 2 inside the magnetic bearing body 1, and a tapered rotating shaft 4 on the side of the rotating shaft 2 near the tapered magnetic bearing body 3. The inclination angle of the tapered surface of the tapered magnetic bearing body 3 is the same as the inclination angle of the tapered surface of the tapered rotating shaft 4. A bearing permanent magnet 5 is provided on the upper half of the magnetic bearing body 1, and a tapered portion of the bearing permanent magnet 6 is provided on the upper half of the tapered magnetic bearing body 3. An on-shaft permanent magnet 7 is provided on the rotating shaft 2, and a tapered portion of the on-shaft permanent magnet 8 is provided on the tapered rotating shaft 4. The bearing permanent magnet 5 corresponds to the on-shaft permanent magnet 7, and the tapered portion of the bearing permanent magnet 6 corresponds to the tapered portion of the on-shaft permanent magnet 8.

[0022] The rotating shaft 2 is located on the magnetic bearing body 1 and is arranged concentrically in the radial direction, forming a non-contact rotation with the magnetic bearing body 1.

[0023] The bearing permanent magnet 5 and the shaft permanent magnet 7 are staggered, and the staggered distribution between the permanent magnets is used to provide additional axial force for the rotating shaft 2.

[0024] Both the bearing permanent magnet 5 and the tapered bearing permanent magnet 6 have multiple circumferentially distributed first mounting holes on their back sides. A first connector 9 is installed in each of the first mounting holes. The bearing permanent magnet 5 is fixedly connected to the magnetic bearing body 1 through the first connector 9, and the tapered bearing permanent magnet 6 is fixedly connected to the tapered magnetic bearing body 3 through the first connector 9.

[0025] The back of both the axial permanent magnet 7 and the tapered axial permanent magnet 8 are provided with a plurality of second mounting holes evenly distributed along the circumference. A second connector 10 is provided in the second mounting hole. The axial permanent magnet 7 is fixedly connected to the rotating shaft 2 through the second connector 10, and the tapered axial permanent magnet 8 is fixedly connected to the tapered rotating shaft 4 through the second connector 10.

[0026] In this embodiment, the first connector 9 and the second connector 10 can be made of glue.

[0027] In this embodiment, the magnetic bearing body 1 can be a water-lubricated bearing, which provides radial force to the rotating shaft 2 through the combined action of magnetic force and water film force.

[0028] The surfaces of the lower half of the magnetic bearing body 1 and the lower half of the tapered magnetic bearing body 3 are covered with aluminum alloy material for magnetic shielding.

[0029] During use, the bearing permanent magnet 5 and the tapered bearing permanent magnet 6 are in a stationary state, while the shaft permanent magnet 7 and the tapered shaft permanent magnet 8 are fixed on the rotating shaft 2 and rotate and float axially with the rotating shaft 2. The magnetic force generated between the bearing permanent magnet 5 and the shaft permanent magnet 7 provides radial force and axial thrust, and the magnetic force generated between the tapered bearing permanent magnet 6 and the tapered shaft permanent magnet 8 provides radial force and axial thrust.

[0030] In this embodiment, neither the lower half of the magnetic bearing body 1 nor the tapered magnetic bearing body 3 is provided with permanent magnets, so as to prevent the magnetic force of the upper and lower parts from canceling the axial thrust, thereby achieving the effect of retaining the axial thrust.

[0031] Example 2: The difference between this example and Example 1 is that the surfaces of the lower half of the magnetic bearing body 1 and the lower half of the tapered magnetic bearing body 3 are covered with a rubber material for magnetic shielding.

[0032] For those skilled in the art, any changes, modifications, substitutions, and variations made to the implementation methods without departing from the principles and spirit of this utility model, based on the teachings of this utility model, still fall within the protection scope of this utility model.

Claims

1. A novel permanent magnetic conical bearing with integrated radial and thrust, characterized by: The application relates to a magnetic bearing body (1), one side of the magnetic bearing body (1) is provided with a conical magnetic bearing body (3), a rotating shaft (2) is arranged in the magnetic bearing body (1), the rotating shaft (2) is provided with a conical rotating shaft (4) on the side close to the conical magnetic bearing body (3), the conical surface inclination angle of the conical magnetic bearing body (3) is the same as the conical surface inclination angle of the conical rotating shaft (4); a bearing permanent magnet (5) is arranged on the upper half of the magnetic bearing body (1), a conical partial bearing permanent magnet (6) is arranged on the upper half of the conical magnetic bearing body (3), an on-shaft permanent magnet (7) is arranged on the rotating shaft (2), a conical partial on-shaft permanent magnet (8) is arranged on the conical rotating shaft (4), the bearing permanent magnet (5) corresponds to the on-shaft permanent magnet (7), and the conical partial bearing permanent magnet (6) corresponds to the conical partial on-shaft permanent magnet (8).

2. A novel permanent magnetic conical bearing of integrated radial and thrust type as claimed in claim 1, wherein: The rotating shaft (2) is arranged in the magnetic bearing body (1) in a radial concentric mode and forms non-contact rotation with the magnetic bearing body (1).

3. The novel permanent magnetic conical bearing of claim 2, wherein: The bearing permanent magnet (5) and the on-shaft permanent magnet (7) are distributed in a staggered mode, and the staggered distribution between the permanent magnets is used for providing additional axial force for the rotating shaft (2).

4. The novel permanent magnetic conical bearing of claim 3, wherein: The back surfaces of the bearing permanent magnet (5) and the conical partial bearing permanent magnet (6) are provided with a plurality of first arrangement holes which are uniformly distributed in a circumferential direction, and the first arrangement holes are provided with first connecting pieces (9).

5. The novel permanent magnetic conical bearing of claim 4, wherein: The bearing permanent magnet (5) is fixedly connected with the magnetic bearing body (1) through the first connecting pieces (9), and the conical partial bearing permanent magnet (6) is fixedly connected with the conical magnetic bearing body (3) through the first connecting pieces (9).

6. The novel permanent magnetic conical bearing of claim 5, wherein: The back surfaces of the on-shaft permanent magnet (7) and the conical partial on-shaft permanent magnet (8) are provided with a plurality of second arrangement holes which are uniformly distributed in a circumferential direction, and the second arrangement holes are provided with second connecting pieces (10).

7. The novel permanent magnetic conical bearing of claim 6, wherein: The on-shaft permanent magnet (7) is fixedly connected with the rotating shaft (2) through the second connecting pieces (10), and the conical partial on-shaft permanent magnet (8) is fixedly connected with the conical rotating shaft (4) through the second connecting pieces (10).

8. The novel permanent magnetic conical bearing of claim 7, wherein: The surfaces of the lower halves of the magnetic bearing body (1) and the conical magnetic bearing body (3) are covered with aluminum alloy materials for magnetic isolation.

9. The novel permanent magnetic conical bearing of claim 7, wherein: The surfaces of the lower halves of the magnetic bearing body (1) and the conical magnetic bearing body (3) are covered with rubber materials for magnetic isolation.

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