CN221042438U

CN221042438U - Rotor sheath structure of high-speed permanent magnet motor

Info

Publication number: CN221042438U
Application number: CN202322839241.2U
Authority: CN
Inventors: 吴桂珍
Original assignee: Beijing Mager Motor Technology Co ltd
Current assignee: Beijing Mager Motor Technology Co ltd
Priority date: 2023-10-23
Filing date: 2023-10-23
Publication date: 2024-05-28
Anticipated expiration: 2033-10-23

Abstract

The utility model relates to a rotor sheath field, and disclose a high-speed permanent magnet machine's rotor sheath structure, it includes body structure and improvement structure: the body structure comprises a rotor and a metal sleeve, and a fixing mechanism for fixing the rotor and the metal sleeve is arranged between the rotor and the metal sleeve; the improved structure comprises a bushing arranged between the rotor and the metal sleeve, wherein the thermal expansion coefficient of the bushing is smaller than that of the rotor and the metal sleeve, and the bushing is fixed between the rotor and the metal sleeve by a fixing mechanism. The lining is additionally arranged between the rotor and the metal sleeve, and the thermal expansion coefficient of the lining is smaller than that of the rotor and the metal sleeve, so that the gap between the metal sleeve and the rotor can be adjusted at different temperatures to adapt to the difference of thermal expansion; in addition, an elastic connection structure consisting of a rubber ring is arranged between the metal sleeve and the bushing, and the design can provide certain elastic deformation when the rotor expands so as to absorb stress and deformation caused by thermal expansion mismatch.

Description

Rotor sheath structure of high-speed permanent magnet motor

Technical Field

The utility model belongs to the field of rotor jackets, and particularly relates to a rotor jacket structure of a high-speed permanent magnet motor.

Background

A rotor sheath is a device for protecting a rotor. In mechanical systems, the rotor is typically a rotating component, and the rotor jacket is an outer protective layer that wraps around the rotor. Its primary function is to prevent the rotor from coming into contact with the external environment while providing structural support and protecting the rotor from damage.

Since the rotor and the jacket may be made of different materials, they undergo different degrees of thermal expansion when heated. If the coefficients of thermal expansion do not match, a change in the gap between the jacket and the rotor may result, which in turn affects the stability and lifetime of the device.

Disclosure of utility model

The technical problems to be solved are as follows: the mismatch in the degree of rotor thermal expansion and the degree of jacket thermal expansion results in a gap variation.

The technical scheme is as follows: the utility model provides a rotor sheath structure of a high-speed permanent magnet motor, which comprises a body structure and an improved structure: the body structure comprises a rotor and a metal sleeve, and a fixing mechanism for fixing the rotor and the metal sleeve is arranged between the rotor and the metal sleeve; the improved structure comprises a bushing arranged between the rotor and the metal sleeve, wherein the thermal expansion coefficient of the bushing is smaller than that of the rotor and the metal sleeve, and the bushing is fixed between the rotor and the metal sleeve by a fixing mechanism.

Further, the fixing mechanism comprises a plurality of screws which are distributed in an equidistant annular array and sequentially penetrate through the metal sleeve and the bushing to be screwed with the rotor thread.

Further, the bushing is a ceramic sleeve.

Further, a plurality of annular rubber rings which are uniformly distributed along the length direction are connected between the bushing and the metal sleeve, and a space exists between every two adjacent rubber rings.

Further, each screw is sleeved with a backing ring, and each backing ring is an elastic ring.

Further, the outer layer of the metal sleeve is coated with a thermal isolation coating, and the thermal isolation coating can reduce heat conduction and reduce temperature change of the metal sleeve, so that influence caused by thermal expansion mismatch is reduced.

Further, the thermal isolation coating can be a composite magnesium aluminum silicate thermal isolation coating or a rare earth thermal insulation coating.

The technical effects are as follows:

1. In the utility model, a layer of lining is additionally arranged between the rotor and the metal sleeve, and the thermal expansion coefficient of the lining is smaller than that of the rotor and the metal sleeve, so that the gap between the metal sleeve and the rotor can be adjusted at different temperatures to adapt to the difference of thermal expansion.

2. An elastic connection structure consisting of rubber rings is installed between the metal sleeve and the bushing, and the design can provide certain elastic deformation when the rotor expands so as to absorb stress and deformation caused by thermal expansion mismatch.

3. The surface of the metal sleeve is coated with a coating with excellent heat insulation performance, and the coating can reduce heat conduction and reduce temperature change of the metal sleeve, so that influence caused by thermal expansion mismatch is reduced.

Drawings

The accompanying drawings are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate the utility model and together with the embodiments of the utility model, serve to explain the utility model. In the drawings:

FIG. 1 is a schematic perspective view of the present utility model;

FIG. 2 is a schematic side view of the present utility model;

FIG. 3 is an exploded view of the structure of the present utility model;

In the figure:

1. A rotor; 2. a bushing; 3. a metal sleeve; 4. a rubber ring.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application; it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments, and that all other embodiments obtained by persons of ordinary skill in the art without making creative efforts based on the embodiments in the present application are within the protection scope of the present application.

In the description of the present application, it should be noted that the positional or positional relationship indicated by the terms such as "upper", "lower", "inner", "outer", "top/bottom", etc. are based on the positional or positional relationship shown in the drawings, are merely for convenience of describing the present application and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present application. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

The rotor sheath structure of the high-speed permanent magnet motor provided by the embodiment of the invention, as shown in fig. 1, 2 and 3, comprises a body structure and an improved structure, wherein: the body structure comprises a rotor 1 and a metal sleeve 3, and a fixing mechanism for fixing the rotor 1 and the metal sleeve 3 is arranged between the rotor 1 and the metal sleeve; the improved structure comprises a lining 2 arranged between a rotor 1 and a metal sleeve 3, wherein the thermal expansion coefficient of the lining 2 is smaller than that of a thermal expansion system of the rotor 1 and the metal sleeve 3, and the lining 2 is fixed between the rotor 1 and the metal sleeve 3 by a fixing mechanism, and can be a ceramic sleeve; the fixing mechanism comprises a plurality of screws which are distributed in an equidistant annular array and sequentially penetrate through the metal sleeve 3 and the bushing 2 to be screwed with the rotor 1, so that a layer of bushing 2 is additionally arranged between the rotor 1 and the metal sleeve 3, the thermal expansion coefficient of the layer of bushing 2 is smaller than that of the rotor 1 and the metal sleeve 3, and the gap between the metal sleeve 3 and the rotor 1 can be adjusted at different temperatures to adapt to the difference of thermal expansion. In addition, it should be mentioned that, because the surface of the metal sleeve 3 is arc-shaped, in order to avoid the problem of slipping of the screws, a backing ring is sleeved on each screw, and each backing ring is an elastic ring.

In addition, a plurality of annular rubber rings 4 which are uniformly distributed along the length direction of the bushing 2 and the metal sleeve 3 can be connected between the bushing 2 and the metal sleeve 3, and a space exists between every two adjacent rubber rings 4, so that certain elastic deformation can be provided when the rotor 1 expands, and stress and deformation caused by thermal expansion mismatch can be absorbed. This rubber ring 4 structure may be replaced by a piston structure mounted between the rotor sheath and the rotor, the piston being movable when the rotor expands to maintain a suitable clearance. The piston structure can be composed of a piston ring and a piston rod, and the length of the piston rod can be adjusted according to the thermal expansion difference. Alternatively, liquid expansion compensation is achieved by introducing a thermal expansion medium, such as expansion oil or liquid, into the cavity between the rotor sheath and the rotor. When the rotor expands, the volume of the thermal expansion medium increases, thereby compensating for the gap change caused by the thermal expansion.

In addition to the above, the outer layer of the metal sleeve 3 may be coated with a thermal isolation coating, which may reduce heat conduction and temperature variation of the metal sleeve 3, thereby reducing the effect of thermal expansion mismatch. The thermal barrier coating may be a composite magnesium aluminum silicate thermal barrier coating or a rare earth thermal barrier coating.

The above embodiments are not intended to limit the scope of the present application, so: all equivalent changes in structure, shape and principle of the application should be covered in the scope of protection of the application.

In the idle position of the device, all the electric devices and the matched drivers are arranged, and all the driving devices refer to power elements, electric devices and matched power sources which are connected through wires by a person skilled in the art, and the specific connection means is to be referred to the description above, the electric connection of the electric devices is completed according to the sequence of work, and the detailed connection means is a well-known technology in the art.

Claims

1. The utility model provides a rotor sheath structure of high-speed permanent magnet machine, includes body structure and improvement structure:

The body structure comprises a rotor (1) and a metal sleeve (3), and is characterized in that a fixing mechanism for fixing the rotor (1) and the metal sleeve (3) is arranged between the rotor and the metal sleeve;

The improved structure comprises a lining (2) arranged between the rotor (1) and the metal sleeve (3), wherein the thermal expansion coefficient of the lining (2) is smaller than that of the rotor (1) and the metal sleeve (3), and the lining is fixed between the rotor (1) and the metal sleeve (3) by a fixing mechanism.

2. The rotor sheath structure of a high-speed permanent magnet motor according to claim 1, wherein the fixing mechanism comprises a plurality of screws which are distributed in an equidistant annular array and sequentially penetrate through the metal sleeve (3) and the bushing (2) to be screwed with the rotor (1).

3. Rotor sheathing structure for high-speed permanent magnet motors according to claim 1, characterized in that the bushing (2) is a ceramic sleeve.

4. The rotor sheath structure of a high-speed permanent magnet motor according to claim 1, wherein a plurality of annular rubber rings (4) which are uniformly distributed along the length direction are connected between the bushing (2) and the metal sleeve (3), and a space exists between every two adjacent rubber rings (4).

5. The rotor sheathing structure of a high-speed permanent magnet motor according to claim 2, wherein each screw is sleeved with a backing ring, and each backing ring is an elastic ring.

6. The rotor jacket structure of a high-speed permanent magnet motor according to claim 1, characterized in that the outer layer of the metal jacket (3) is coated with a heat-insulating coating, which can reduce heat conduction and reduce temperature variation of the metal jacket (3), thereby reducing the influence caused by thermal expansion mismatch.

7. The rotor sheathing structure of a high-speed permanent magnet machine according to claim 6, wherein the thermal barrier coating is a composite magnesium aluminum silicate thermal barrier coating or a rare earth thermal barrier coating.