Radial positioning device of magnetic suspension motor

Abstract

The utility model provides a radial positioning device of a magnetic suspension motor, which is used for adjusting the concentricity of a main shaft and a casing, a main stator is fixedly mounted on the inner ring of the casing, end covers cover two ends of the casing, a through hole is arranged in the middle of each end cover, the periphery of the main shaft is positioned in the through hole, a main rotor is arranged on the main shaft, and the main rotor is positioned on the inner ring of the main stator. The two ends of the main stator are each provided with one radial positioning device, each radial positioning device comprises a stator assembly, each stator assembly is of a hollow cylindrical structure, the periphery of each stator assembly is fixedly connected to the inner ring of the machine shell in a sleeved mode, the periphery of the main shaft is located on the inner ring of each stator assembly, and the stator assemblies can attract or repel the main shaft through magnetism. According to the radial positioning device of the magnetic suspension motor, a gap exists between the inner ring of the casing and the periphery of the main shaft, concentric centralizing is carried out through the radial positioning devices, and in order to prevent the main shaft from deflecting, the two ends of the main stator are respectively provided with one radial positioning device.

Description

Technical Field

[0001] The utility model belongs to the field of magnetic suspension motors, in particular to a radial positioning device of a magnetic suspension motor. Background Art

[0002] Magnetic levitation motor is a special motor with contactless operation between stator and mover. According to the force of magnetic field, it is divided into attraction type and repulsion type; according to the degree of magnetic field coupling, it is divided into independent control type of suspension force and driving force and coupling control type of suspension force and driving force; according to the structure of stator and mover, it is divided into magnetic levitation rotary motor and magnetic levitation linear motor. It is used in occasions such as magnetic levitation trains, magnetic levitation bearings and magnetic levitation artificial heart blood pumps. In the prior art, there is a gap between the stator and the rotor due to contactless operation between the stator and the mover. If there is no floating action before the motor is pneumatic, there will be a problem of radial movement, which will cause equipment abnormality or damage. Utility Model Content

[0003] In view of this, the utility model aims to provide a radial positioning device for a magnetic levitation motor to solve the problem that the magnetic levitation motor in the prior art has no straightening action before starting and easily causes the main shaft to move after starting.

[0004] In order to achieve the above object, the technical solution of the utility model is implemented as follows:

[0005] A radial positioning device for a magnetic levitation motor is used to adjust the concentricity of a main shaft and a casing, and a main stator is fixedly installed on the inner ring of the casing, end covers are sealed at both ends of the casing, a through hole is provided in the middle of the end cover, the periphery of the main shaft is located in the through hole, a main rotor is provided on the main shaft, the main rotor is located in the inner ring of the main stator, and one radial positioning device is provided at each end of the main stator, the radial positioning device comprises a stator assembly, the stator assembly is a hollow cylindrical structure, the periphery of the stator assembly is fixedly sleeved to the inner ring of the casing, the periphery of the main shaft is located in the inner ring of the stator assembly, the stator assembly can magnetically attract or repel the main shaft, the stator assembly attaches the main shaft by magnetic attraction or magnetic repulsion so that the main shaft is suspended in the inner ring of the casing, and the main shaft is magnetically suspended in the inner ring of the stator assembly, thereby avoiding energy waste caused by friction of the main shaft and damage to parts caused by a mechanical transmission structure.

[0006] Furthermore, the outer periphery of the main shaft is fixedly sleeved with a rotor core.

[0007] Furthermore, the rotor core is fixedly sleeved to the periphery of the main shaft through a rotor positioning sleeve.

[0008] Furthermore, the inner ring of the casing is fixedly installed on the core bracket through a bearing bracket, and the core bracket is a barrel-shaped structure. A first through hole is provided in the middle of the core bracket, and the main shaft is located in the first through hole. The stator assembly is fixedly installed in the core bracket through a stator lock nut.

[0009] Furthermore, an adjustment sheet is provided at one end of the stator assembly, and a stator lock nut is located at the other end of the stator assembly, and one end of the adjustment sheet abuts against the bottom of the barrel-shaped structure.

[0010] Furthermore, the adjustment piece is a hollow cylindrical structure, and the adjustment piece is used to adjust the relative position of the stator assembly in the core bracket.

[0011] Compared with the prior art, the radial positioning device of a magnetic levitation motor described in the utility model has the following beneficial effects:

[0012] (1) The utility model discloses a radial positioning device for a magnetic levitation motor. There is a gap between the inner ring of the casing and the outer periphery of the main shaft. The radial positioning device is used for concentric alignment. In order to prevent the main shaft from being skewed, a radial positioning device is provided at each end of the main stator. The stator assembly can magnetically attract or repel the main shaft. The stator assembly attaches the main shaft by magnetic attraction or repulsion so that the main shaft is suspended in the inner ring of the casing. The main shaft is magnetically suspended in the inner ring of the stator assembly, thereby avoiding energy waste caused by friction of the main shaft and damage to parts caused by the mechanical transmission structure.

[0013] (2) The utility model describes a radial positioning device for a magnetic levitation motor, wherein the stator assembly is fixedly installed in the core bracket by a stator lock nut, and the core bracket positions and fixes the stator assembly, so that the stator assembly and the core bracket form an installation module, so as to protect the stator assembly and facilitate installation by the staff. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the accompanying drawings:

[0015] Figure 1 It is a cross-sectional schematic diagram of a radial positioning device of a magnetic levitation motor described in Embodiment 2 of the utility model in the motor;

[0016] Figure 2 It is a cross-sectional schematic diagram of a radial positioning device of a magnetic levitation motor described in an embodiment of the utility model.

[0017] Description of reference numerals:

[0018] 1. Casing; 2. End cover; 3. Main stator; 4. Main rotor; 5. Main shaft; 6. Stator assembly; 7. Rotor core; 8. Bearing bracket; 9. Core bracket; 10. Stator lock nut; 11. Adjustment sheet; 12. Rotor positioning sleeve. DETAILED DESCRIPTION

[0019] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0020] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0021] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0022] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0023] like Figure 1-Figure 2 As shown, a radial positioning device of a magnetic suspension motor is used to adjust the concentricity of a main shaft 5 and a casing 1, and a main stator 3 is fixedly installed on the inner ring of the casing 1, and end covers 2 are sealed at both ends of the casing 1. A through hole is provided in the middle of the end cover 2, and the periphery of the main shaft 5 is located in the through hole. A main rotor 4 is provided on the main shaft 5, and the main rotor 4 is located on the inner ring of the main stator 3. There is a gap between the inner ring of the casing 1 and the periphery of the main shaft 5. Concentric alignment is performed through the radial positioning device, and in order to prevent the main shaft 5 from deflecting, as shown in FIG. Figure 1As shown, a radial positioning device is respectively provided at both ends of the main stator 3, and the radial positioning device is respectively provided at both ends of the main stator 3, and the radial positioning device includes a stator assembly 6, and the stator assembly 6 is a hollow cylindrical structure. The outer periphery of the stator assembly 6 is fixedly sleeved to the inner ring of the casing 1, and the outer periphery of the main shaft 5 is located in the inner ring of the stator assembly 6. The stator assembly 6 can magnetically attract or repel the main shaft 5, and the stator assembly 6 attaches the main shaft 5 by magnetic attraction or magnetic repulsion to make the main shaft 5 suspended in the inner ring of the casing 1, so that the main shaft 5 is magnetically suspended in the inner ring of the stator assembly 6, thereby avoiding the mechanical transmission structure causing friction of the main shaft 5 to waste energy and damage to parts.

[0024] The rotor core 7 is fixedly sleeved on the periphery of the main shaft 5 , and the rotor core 7 is fixedly sleeved on the periphery of the main shaft 5 through a rotor positioning sleeve 12 , so that the staff can position and fix the rotor core 7 for easy installation.

[0025] The inner ring of the casing 1 is fixedly installed with the core bracket 9 through the bearing bracket 8, and the core bracket 9 is a barrel-shaped structure. A first through hole is provided in the middle of the core bracket 9, and the main shaft 5 is located in the first through hole. The stator assembly 6 is fixedly installed in the core bracket 9 through the stator lock nut 10. The core bracket 9 positions and fixes the stator assembly 6, so that the stator assembly 6 and the core bracket 9 form an installation module to protect the stator assembly 6 and facilitate installation by the staff.

[0026] An adjustment piece 11 is provided at one end of the stator assembly 6, and a stator lock nut 10 is located at the other end of the stator assembly 6. One end of the adjustment piece 11 abuts against the bottom of the barrel structure. The adjustment piece 11 is a hollow cylindrical structure. The adjustment piece 11 is used to adjust the relative position of the stator assembly 6 in the core bracket 9. The staff can meet different installation conditions by adjusting the thickness of the adjustment piece 11. The radial positioning assembly has a simple structure, is stable and reliable, and can withstand the high-speed output of a high-power motor.

[0027] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A radial positioning device for a magnetic suspension motor, used for adjusting the concentricity between a main shaft (5) and a housing (1), wherein a main stator (3) is fixedly mounted on the inner ring of the housing (1), end covers (2) are sealed at both ends of the housing (1), a through hole is provided in the middle of the end cover (2), the outer periphery of the main shaft (5) is located in the through hole, a main rotor (4) is provided on the main shaft (5), and the main rotor (4) is located on the inner ring of the main stator (3), characterized in that: A radial positioning device is provided at each end of the main stator (3), and the radial positioning device comprises a stator assembly (6). The stator assembly (6) is a hollow cylindrical structure. The outer periphery of the stator assembly (6) is fixedly sleeved to the inner ring of the housing (1), and the outer periphery of the main shaft (5) is located in the inner ring of the stator assembly (6). The stator assembly (6) and the main shaft (5) can be magnetically attracted or magnetically repelled.

2. The radial positioning device of a magnetic levitation motor according to claim 1, characterized in that: The outer periphery of the main shaft (5) is fixedly sleeved with a rotor iron core (7).

3. The radial positioning device of a magnetic levitation motor according to claim 2, characterized in that: The rotor iron core (7) is fixedly sleeved to the periphery of the main shaft (5) via a rotor positioning sleeve (12).

4. The radial positioning device of a magnetic levitation motor according to claim 1, characterized in that: The inner ring of the casing (1) is fixedly mounted on the core bracket (9) via a bearing bracket (8), and the core bracket (9) is a barrel-shaped structure. A first through hole is provided in the middle of the core bracket (9), and the main shaft (5) is located in the first through hole. The stator assembly (6) is fixedly mounted in the core bracket (9) via a stator lock nut (10).

5. The radial positioning device of a magnetic levitation motor according to claim 4, characterized in that: An adjustment sheet (11) is provided at one end of the stator assembly (6), and a stator lock nut (10) is located at the other end of the stator assembly (6), and one end of the adjustment sheet (11) abuts against the bottom of the barrel-shaped structure.

6. The radial positioning device of a magnetic levitation motor according to claim 5, characterized in that: The adjustment piece (11) is a hollow cylindrical structure and is used to adjust the relative position of the stator assembly (6) in the core support (9).

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