Rotor structure of permanent magnet motor

Abstract

The utility model discloses a rotor structure of a permanent magnet motor, which relates to the technical field of motors and comprises an inner transmission shaft. The inner transmission shaft is connected with a mounted bearing mounted on a rotor frame in a matched manner, two rotors are connected to the outer side of the inner transmission shaft in a sleeving manner, and the orientations of the two rotors are opposite; a plurality of arc-shaped guide sheets are welded on the outer side of the rotor and are arranged in an annular array along the central axis of the transmission shaft; the rotors are arranged in a triangular shape, and the two rotors face different directions, so that more kinetic energy can be provided to drive the inner transmission shaft to rotate, the arc-shaped guide pieces can rotate along with the rotors, gas on the inner side can flow along with the rotating shafts of the rotors, and under the action of the arc-shaped guide pieces, flowing and guiding of the gas can be improved; and the temperature of the inner side is reduced.

Description

Technical Field

[0001] The utility model specifically relates to the technical field of motors, and specifically to a rotor structure of a permanent magnet motor. Background Technique

[0002] A permanent magnet synchronous motor is composed of components such as a stator, a rotor, and an end cover. The stator is basically the same as that of a common induction motor, and a laminated structure is adopted to reduce the iron loss during the operation of the motor. The rotor can be made solid or laminated. The armature winding can adopt a concentrated full-pitch winding, a distributed short-pitch winding, or an unconventional winding.

[0003] Chinese Utility Model Publication No. CN 207124503 U discloses a rotor core and a rotor. A plurality of magnet slots are opened on the rotor core. The magnet slots include a plurality of circumferentially spaced arrangements along the rotor core. Slits are provided on both circumferential sides of the magnet slots along the rotor core, and the slits are adjacent to the outer peripheral surface of the rotor core.

[0004] For the above-mentioned rotor core and rotor, during use, the heat generated by the inner rotor is not easily dissipated, increasing the load during the operation of the motor, and the outer support strength is relatively low. Therefore, we provide a rotor structure of a permanent magnet motor. By two rotors arranged in a triangle and facing different directions, while increasing the rotational speed, the arc-shaped guide pieces on the rotor can drive the gas movement inside and have a guiding effect to reduce the heat inside. The rotor frame cooperates with the inner tube and the inner protective layer to increase the structural strength, thus effectively making up for the above problems. Summary of the Utility Model

[0005] The purpose of the present utility model is to provide a rotor structure of a permanent magnet motor to solve the problems raised in the background technique.

[0006] To achieve the above purpose, the present utility model provides the following technical solutions:

[0007] A rotor structure of a permanent magnet motor includes an inner transmission shaft; the inner transmission shaft is connected in cooperation with a pedestal bearing installed on a rotor frame, and two rotors are sleeved outside the inner transmission shaft. Secondly, the two rotors face in opposite directions; a plurality of arc-shaped guide pieces are welded outside the rotor, and the plurality of arc-shaped guide pieces are arranged in a circular array along the central axis of the transmission shaft.

[0008] As a further technical solution of the present utility model, a plurality of inner tubes are welded on the inner wall of the rotor frame. The inner tubes are arranged in a circular array along the central axis of the transmission shaft. Secondly, the inner tubes are also welded to an inner protective layer.

[0009] As a further technical solution of the present utility model, a number of heat dissipation slots are opened on both the rotor frame and the inner protective layer.

[0010] As a further technical solution of the present utility model, fixing feet are welded to the bottom of the rotor frame, and the fixing feet are fixed to the inner wall of the motor housing by bolts.

[0011] As a further technical solution of the present utility model, the transmission shaft is also in mating connection with a pedestal bearing installed on the front fixing plate.

[0012] As a further technical solution of the present utility model, the front fixing plate is fixed to the motor housing by bolts.

[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0014] In the present utility model, the rotor is triangularly arranged, and the two rotors face different directions, so as to provide more kinetic energy to drive the inner transmission shaft to rotate. The arc-shaped guide piece can follow the rotation of the rotor, and the gas inside can flow along the rotation axis of the rotor. With the cooperation of the arc-shaped guide piece, the flow and guidance of the gas can be increased, and the temperature inside can be reduced;

[0015] In the present utility model, the inner tube on the inner wall of the rotor frame and the inner protective layer can increase its structural strength and improve the supporting force;

[0016] In the present utility model, the fixing feet facilitate the fixing of the rotor frame, and the front fixing plate facilitates the fixing of the inner transmission shaft. Description of the Drawings

[0017] Figure 1 is a three-dimensional structural schematic diagram of the present utility model.

[0018] Figure 2 is another perspective schematic diagram of the present utility model Figure 1

[0019] Figure 3 is the front view of the present utility model Figure 1

[0020] Figure 4 is the sectional view taken along line A-A of the present utility model Figure 3

[0021] In the figure: 1-rotor frame, 2-inner transmission shaft, 3-front fixing plate, 4-rotor, 5-arc-shaped guide piece, 6-inner protective layer, 7-heat dissipation groove, 8-fixing foot, 9-inner tube. Detailed Embodiments

[0022] ​​​Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0023] Please refer to Figures 1-4 , in the embodiment of the present invention, a rotor structure of a permanent magnet motor includes an inner transmission shaft 2; the inner transmission shaft 2 is cooperatively connected with a pedestal bearing installed on a rotor frame 1, and two rotors 4 are sleeved outside the inner transmission shaft 2. Secondly, the two rotors 4 face in opposite directions; a plurality of arc-shaped guide pieces 5 are welded outside the rotor 4, and the plurality of arc-shaped guide pieces 5 are arranged in a circular array along the central axis of the transmission shaft 2.

[0024] By adopting the above technical solution, the rotor 4 is triangularly arranged, and the two rotors 4 face in different directions, so that more kinetic energy can be provided to drive the inner transmission shaft 2 to rotate. The arc-shaped guide piece 5 can rotate along with the rotor 4, and the gas inside can flow along with the rotating shaft of the rotor 4. With the cooperation of the arc-shaped guide piece 5, the flow and guidance of the gas can be increased, and the temperature inside can be reduced.

[0025] In this embodiment, a plurality of inner tubes 9 are welded on the inner wall of the rotor frame 1, and the inner tubes 9 are arranged in a circular array along the central axis of the transmission shaft 2. Secondly, the inner tubes 9 are also welded to the inner protective layer 6.

[0026] Furthermore, a plurality of heat dissipation grooves 7 are opened on both the rotor frame 1 and the inner protective layer 6.

[0027] By adopting the above technical solution, the inner tubes 9 on the inner wall of the rotor frame 1 and the inner protective layer 6 can increase its structural strength and improve the supporting force.

[0028] In this embodiment, a fixing foot 8 is welded to the bottom of the rotor frame 1, and the fixing foot 8 is fixed to the inner wall of the motor housing by bolts.

[0029] Furthermore, the transmission shaft 2 is also cooperatively connected with a pedestal bearing installed on a front fixing plate 3.

[0030] Furthermore, the front fixing plate 3 is fixed to the motor housing by bolts.

[0031] By adopting the above technical solution, the fixing foot 8 facilitates the fixing of the rotor frame 1, and the front fixing plate 3 facilitates the fixing of the inner transmission shaft 2.

[0032] The working principle of the present utility model is as follows: During use, the rotor 4 is arranged in a triangular shape, and the two rotors 4 face different directions, so as to provide more kinetic energy to drive the inner transmission shaft 2 to rotate. The arc-shaped guide vane 5 can rotate following the rotor 4, and the gas inside can flow along the rotation axis of the rotor 4. With the cooperation of the arc-shaped guide vane 5, the flow and guidance of the gas can be increased, and the temperature inside can be reduced; the inner tube 9 on the inner wall of the rotor frame 1 and the inner protective layer 6 can increase its structural strength and improve the supporting force; the fixed feet 8 facilitate the fixation of the rotor frame 1, and the front fixing plate 3 facilitates the fixation of the inner transmission shaft 2.

[0033] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above-described exemplary embodiments, and without departing from the spirit or basic characteristics of the present utility model, the present utility model can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present utility model. Any reference signs in the claims should not be regarded as limiting the claimed rights.

[0034] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A rotor structure of a permanent magnet motor, characterized in that: It includes an inner transmission shaft (2); the inner transmission shaft (2) is cooperatively connected with a pedestal bearing mounted on the rotor frame (1), and two rotors (4) are sleeved outside the inner transmission shaft (2). Secondly, the two rotors (4) face in opposite directions; a plurality of arc-shaped guide vanes (5) are welded to the outside of the rotor (4), and the plurality of arc-shaped guide vanes (5) are arranged in a circular array along the central axis of the transmission shaft (2).

2. The rotor structure of a permanent magnet motor according to claim 1, characterized in that: A plurality of inner tubes (9) are welded to the inner wall of the rotor frame (1), and the inner tubes (9) are arranged in a circular array along the central axis of the transmission shaft (2). Secondly, the inner tubes (9) are also welded to the inner protective layer (6).

3. The rotor structure of a permanent magnet motor according to claim 2, characterized in that: A number of heat dissipation grooves (7) are formed in both the rotor frame (1) and the inner protective layer (6).

4. The rotor structure of a permanent magnet motor according to claim 1, characterized in that: Fixed feet (8) are welded to the bottom of the rotor frame (1), and the fixed feet (8) are fixed to the inner wall of the motor housing by bolts.

5. The rotor structure of a permanent magnet motor according to claim 1, characterized in that: The transmission shaft (2) is also cooperatively connected with a pedestal bearing mounted on the front fixing plate (3).

6. The rotor structure of a permanent magnet motor according to claim 5, characterized in that: The front fixing plate (3) is fixed to the motor housing by bolts.

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