Permanent magnet direct drive roller outer rotor structure applied to high-temperature and high-magnetic-field environment

Abstract

The utility model discloses a permanent magnet direct drive roller outer rotor structure applied to a high temperature and high magnetic field environment, which comprises an outer rotor body, the outer rotor body is composed of an outer rotor cylinder surface layer and an outer rotor cylinder inner layer, and an air layer is arranged between the outer rotor cylinder surface layer and the outer rotor cylinder inner layer. Magnetic steel is evenly arranged on the inner surface of the outer rotor cylinder inner layer, heat dissipation ribs are evenly arranged on the outer surface of the outer rotor cylinder inner layer, and a connecting plate is further fixedly connected between the outer rotor cylinder surface layer and the outer rotor cylinder inner layer of the outer rotor body. According to the utility model, a novel outer rotor structure is designed based on the improvement of an existing permanent magnet direct drive roller outer rotor, and the permanent magnet roller can be used under more complex working conditions through temperature isolation, magnetic interference weakening and heat dissipation enhancement of a mechanical structure.

Description

Technical Field

[0001] This utility model relates to the field of permanent magnet synchronous water-cooled motors, and in particular to a permanent magnet direct-drive drum external rotor structure for use in high temperature and high magnetic field environments. Background Technology

[0002] With the development of permanent magnet motor technology, space-constrained places such as coal mines and underground mines are increasingly inclined to use permanent magnet direct drive drums that combine drums and permanent magnet motors. Compared with traditional asynchronous motors with speed reducers, permanent magnet motor direct drive, and drums with built-in asynchronous motors with speed reducers, permanent magnet direct drive drums have the advantages of small footprint and high system efficiency.

[0003] While permanent magnet direct-drive rollers offer significant advantages in terms of space and efficiency compared to previous designs, current designs often involve embedding the permanent magnets into the inner wall of the outer rotor cylinder. This presents several limitations in actual production. When transporting high-temperature materials, the material's temperature is conducted to the roller body, causing the magnets to demagnetize due to the high-temperature environment, leading to a decrease in roller performance or even rendering the roller inoperable. Furthermore, coal mine conveyor belts often employ magnetic separators, which are essentially large electromagnets. When the magnetic separator is positioned above the permanent magnet direct-drive roller, its magnetic field may interfere with the roller. Utility Model Content

[0004] The purpose of this utility model is to solve the problems existing in the prior art as mentioned in the background art. To achieve the above objective, this utility model adopts the following technical solution:

[0005] A permanent magnet direct-drive drum outer rotor structure for use in high-temperature and high-magnetic-field environments includes an outer rotor body, which is composed of an outer rotor cylinder surface layer and an outer rotor cylinder inner layer. An air layer is formed between the outer rotor cylinder surface layer and the outer rotor cylinder inner layer. Magnets are uniformly arranged on the inner surface of the outer rotor cylinder inner layer, and heat dissipation ribs are uniformly arranged on the outer surface of the outer rotor cylinder inner layer. A connecting plate is also fixedly connected between the outer rotor cylinder surface layer and the outer rotor cylinder inner layer of the outer rotor body.

[0006] Preferably, the magnet is an elongated block shape having a length direction, a width direction, and a thickness direction, and the direction of the magnetic field inside the magnet is perpendicular to the length direction and the width direction of the magnet.

[0007] Preferably, the heat dissipation fins are welded and fixedly connected to the outer surface of the inner layer of the outer rotor cylinder.

[0008] Preferably, the connecting plate is made of steel structure material.

[0009] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0010] This utility model improves upon existing designs of permanent magnet direct-drive drum outer rotors and designs a new type of outer rotor structure. By adding a cylinder layer, the outer rotor of the belt conveyor is divided into inner and outer layers, connected by a support plate in the middle. There is a large amount of air between the inner and outer layers. The conduction efficiency of temperature and magnetic field in air is extremely low. The heat generated during belt conveyor transportation and the strong magnetic field of the iron separator are unlikely to affect the inside of the permanent magnet direct-drive drum after passing through the metal layer and the air layer. The heat dissipation fins welded on the inner layer of the outer rotor can also better dissipate the internal temperature of the drum, ensuring the operational stability of the permanent magnet direct-drive drum in high temperature and high magnetic environment and extending the drum's lifespan. Attached Figure Description

[0011] Figure 1 This is a schematic cross-sectional view of the existing external rotor structure;

[0012] Figure 2 This is a schematic cross-sectional view of the structure of this utility model.

[0013] In the diagram: 1-Outer rotor body, 11-Outer rotor cylinder surface, 12-Outer rotor cylinder inner layer, 13-Air layer, 2-Magnet, 3-Heat dissipation fins, 4-Connecting plate. Detailed Implementation

[0014] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0015] In the description of this utility model, "multiple" means two or more, unless otherwise explicitly specified.

[0016] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" 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 an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0018] Reference Figure 1-2 A permanent magnet direct-drive drum outer rotor structure for use in high-temperature and high-magnetic-field environments includes an outer rotor body 1, which is composed of an outer rotor cylinder surface layer 11 and an outer rotor cylinder inner layer 12. An air layer 13 is formed between the outer rotor cylinder surface layer 11 and the outer rotor cylinder inner layer 12. Magnets 2 are uniformly arranged on the inner surface of the outer rotor cylinder inner layer 12, and heat dissipation ribs 3 are uniformly arranged on the outer surface of the outer rotor cylinder inner layer 12. A connecting plate 4 is also fixedly connected between the outer rotor cylinder surface layer 11 and the outer rotor cylinder inner layer 12 of the outer rotor body 1. The magnets 2 are elongated blocks with length, width, and thickness directions, and the magnetic field direction within the magnets 2 is perpendicular to the length and width directions of the magnets 2. The heat dissipation ribs 3 are welded and fixedly connected to the outer surface of the outer rotor cylinder inner layer 12. The connecting plate 4 is made of steel.

[0019] Based on the above structural configuration, when this device is in use, the existing outer rotor body is divided into two layers: an outer rotor cylinder surface layer 11 and an inner outer rotor cylinder inner layer 12. The middle layer is connected by a steel structure support plate 4 to increase strength. There are a large number of air layers 13 between the inner and outer layers. The conduction efficiency of temperature and magnetic field in the air layer 13 is extremely low. The heat generated during belt conveyor transportation and the strong magnetic field of the iron separator are difficult to affect the inside of the permanent magnet direct drive drum after passing through the metal layer and the air layer 13. The heat dissipation fins 3 welded on the inner outer rotor layer 12 can also better dissipate the internal temperature of the drum, ensuring the operational stability of the permanent magnet direct drive drum in high temperature and high magnetic environment and the drum life.

[0020] The above embodiments are preferred embodiments of the present utility model, but the embodiments of the present utility model are not limited to the above embodiments. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of the present utility model shall be considered equivalent substitutions and shall be included within the protection scope of the present utility model.

[0021] In the description of this utility model, it should be understood that the terms indicating orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

Claims

1. A permanent magnet direct-drive drum outer rotor structure for use in high-temperature and high-magnetic-field environments, comprising an outer rotor body (1), characterized in that: The outer rotor body (1) is composed of an outer rotor cylinder surface layer (11) and an outer rotor cylinder inner layer (12). There is an air layer (13) between the outer rotor cylinder surface layer (11) and the outer rotor cylinder inner layer (12). Magnets (2) are uniformly arranged on the inner surface of the outer rotor cylinder inner layer (12). Heat dissipation ribs (3) are uniformly arranged on the outer surface of the outer rotor cylinder inner layer (12). A connecting plate (4) is also fixedly connected between the outer rotor cylinder surface layer (11) and the outer rotor cylinder inner layer (12) of the outer rotor body (1).

2. The permanent magnet direct-drive drum external rotor structure applied in a high-temperature and high-magnetic field environment according to claim 1, characterized in that, The magnet (2) is an elongated block shape with a length direction, a width direction and a thickness direction, and the magnetic field direction inside the magnet (2) is perpendicular to the length direction and the width direction of the magnet (2).

3. The permanent magnet direct-drive drum external rotor structure applied in a high-temperature and high-magnetic field environment according to claim 2, characterized in that, The heat dissipation rib (3) is welded and fixedly connected to the outer surface of the inner layer (12) of the outer rotor cylinder.

4. The permanent magnet direct-drive drum external rotor structure applied in a high-temperature and high-magnetic field environment according to claim 3, characterized in that, The connecting plate (4) is made of steel structure material.

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