High-stability high-speed motor rotor

Abstract

The utility model relates to the technical field of high-stability high-speed motor rotors, and discloses a high-stability high-speed motor rotor, which comprises a shaft body and a rotor iron core, a bearing is arranged on the outer wall of the shaft body, stabilizing assemblies are arranged inside and on the outer wall of the rotor iron core, each stabilizing assembly comprises a positioning bump and a permanent magnet, and the positioning bumps are arranged on the outer wall of the shaft body. A heat dissipation channel in a shaft body is communicated with a heat dissipation hole in the inner wall of a rotor core through an arranged stabilizing assembly, an efficient heat dissipation path is formed, demagnetization of permanent magnets and performance reduction of the rotor core are prevented, long-term stable operation of a motor is guaranteed, multiple sets of permanent magnets are installed in a rotor core containing groove, a magnetic circuit is formed by the permanent magnets and the rotor core, stable power is provided for the motor, and the service life of the motor is prolonged. The metal sheath protects the rotor core and optimizes the magnetic circuit, the carbon fiber layer enhances structural strength and counteracts centrifugal force, and the metal sheath and the carbon fiber layer are matched with the shaft body and the rotor core, so that the rotor has high strength and light weight, and the running stability of the motor is improved.

Description

Technical Field

[0001] This utility model relates to the field of high-stability high-speed motor rotor technology, and particularly to a high-stability high-speed motor rotor. Background Technology

[0002] In modern industry, high-speed motors, with their advantages of high speed, high power density, and high efficiency, are widely used in key areas such as new energy vehicles, aerospace, CNC machine tools, and high-speed centrifugal equipment. As various industries continue to raise the performance requirements of equipment, higher standards are being set for the stability, reliability, and heat dissipation performance of high-speed motor rotors.

[0003] The applicant discovered a Chinese patent, "A High-Stability External Rotor Motor," with publication number CN207320994U. This patent primarily addresses the issue of the stator core of the external rotor motor being securely fixed to the sleeve of the end cover. Furthermore, the motor housing near the end cover has a retaining edge for limiting the magnet, which enhances the magnet's fixation and improves the motor's stability. However, this patent lacks a dedicated heat dissipation design, only addressing stability through structural connections and component fixation. In practical use, the absence of a dedicated heat dissipation design may prevent timely heat dissipation, leading to increased internal motor temperature. Prolonged exposure to high temperatures accelerates the aging of the motor's insulation materials. Therefore, we propose a high-stability, high-speed motor rotor. Utility Model Content

[0004] The purpose of this invention is to provide a high-stability, high-speed motor rotor to solve the problem mentioned in the background art that, due to the lack of a dedicated heat dissipation design, stability is only improved from the perspective of structural connection and component fixing. In actual use, the lack of a dedicated heat dissipation design may result in the inability to dissipate heat in time, leading to an increase in the internal temperature of the motor. Prolonged high-temperature environments will accelerate the aging of the motor's insulation materials.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a high-stability high-speed motor rotor, comprising a shaft body and a rotor core, wherein a bearing is provided on the outer wall of the shaft body, and a stabilizing component is provided inside and on the outer wall of the rotor core, the stabilizing component comprising positioning protrusions and permanent magnets, wherein four sets of positioning protrusions are provided, the four sets of positioning protrusions being circumferentially distributed and fixedly connected to the circumferential surface of the shaft body, a heat dissipation channel is provided inside the shaft body, and a carbon fiber layer is connected to the rotor core through a metal sheath.

[0006] As a preferred embodiment, the surface of the rotor core is provided with four sets of positioning grooves, and the four sets of positioning protrusions are respectively adapted to the four sets of positioning grooves. The surface of the rotor core is provided with multiple sets of placement slots distributed in a circular pattern.

[0007] As a preferred embodiment, the permanent magnets are provided in multiple sets, and the multiple sets of permanent magnets are respectively fixedly installed inside the multiple sets of placement slots. The inner wall of the rotor core is provided with multiple sets of heat dissipation holes that are evenly distributed.

[0008] As a preferred embodiment, the metal sheath is fixedly installed on the outer wall of the rotor core, and the carbon fiber layer is fixedly installed on the outer wall of the metal sheath.

[0009] As a preferred embodiment, a sealing assembly is provided on the outside of the shaft body. The sealing assembly includes a sealing sleeve. Threaded grooves are provided on the outer walls of both ends of the shaft body. Two sets of sealing sleeves are provided, and the two sets of sealing sleeves are threadedly connected to the outer walls of the two sets of threaded grooves, respectively.

[0010] As a preferred embodiment, a cross rod is fixedly connected to the outer wall of both sets of sealing sleeves, and a sealing block is fixedly installed inside both sets of sealing sleeves, the sealing block being adapted to the heat dissipation channel.

[0011] The technical effects and advantages of this utility model are as follows:

[0012] 1. Through the set stabilizing components, the heat dissipation channel in the shaft body is connected to the heat dissipation hole in the inner wall of the rotor core, forming an efficient heat dissipation path, preventing permanent magnet demagnetization and rotor core performance degradation, and ensuring long-term stable operation of the motor. Multiple sets of permanent magnets are installed in the rotor core placement slots, forming a magnetic circuit with the core to provide stable power to the motor. The metal sheath protects the rotor core and optimizes the magnetic circuit. The carbon fiber layer enhances the structural strength and counteracts centrifugal force. Together with the shaft body and rotor core, the rotor has both high strength and lightweight, improving the stability of motor operation.

[0013] 2. With the set sealing components, the operator can connect the sealing sleeve to the threaded groove on the outer wall of both ends of the shaft body through the threaded groove. Combined with the matching design of the sealing block and the heat dissipation channel, a double sealing structure can be formed. This can effectively prevent external dust, impurities and other contaminants from entering the interior of the heat dissipation channel, thereby effectively avoiding the impact of blockage on the heat dissipation efficiency of the shaft body and rotor core. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0015] Figure 2 This is a schematic diagram of the overall partial structure of this utility model;

[0016] Figure 3This is a schematic diagram of the stable component structure of this utility model;

[0017] Figure 4 for Figure 3 Diagram showing the breakdown of the middle section;

[0018] Figure 5 This is a schematic diagram of the disassembled structure of the sealing component of this utility model.

[0019] In the diagram: 1. Shaft body; 2. Bearing; 3. Rotor core; 4. Stabilizing component; 401. Positioning protrusion; 402. Heat dissipation channel; 403. Positioning groove; 404. Placement slot; 405. Permanent magnet; 406. Heat dissipation hole; 407. Metal sheath; 408. Carbon fiber layer; 5. Sealing component; 501. Threaded groove; 502. Sealing sleeve; 503. Cross rod; 504. Sealing block. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Example 1:

[0022] Please see the appendix Figure 1 - Appendix Figure 4 A high-stability high-speed motor rotor includes a shaft body 1 and a rotor core 3. A bearing 2 is installed on the outer wall of the shaft body 1. A stabilizing component 4 is installed inside and on the outer wall of the rotor core 3. The stabilizing component 4 includes positioning protrusions 401 and permanent magnets 405. Four sets of positioning protrusions 401 are arranged circumferentially and fixedly connected to the circumferential surface of the shaft body 1. A heat dissipation channel 402 is provided inside the shaft body 1. A carbon fiber layer 408 is connected to the rotor core 3 through a metal sheath 407. The surface of the rotor core 3... The rotor core 3 has four sets of positioning grooves 403, and four sets of positioning protrusions 401 are respectively adapted to the four sets of positioning grooves 403. The rotor core 3 has multiple sets of circumferentially distributed placement slots 404. Multiple sets of permanent magnets 405 are provided, and multiple sets of permanent magnets 405 are respectively fixedly installed inside the multiple sets of placement slots 404. Multiple sets of heat dissipation holes 406 are equally distributed on the inner wall of the rotor core 3. The metal sheath 407 is fixedly installed on the outer wall of the rotor core 3, and the carbon fiber layer 408 is fixedly installed on the outer wall of the metal sheath 407.

[0023] The bearing 2 can provide support and positioning for the rotation of the shaft body 1, reduce friction and wear during the rotation process, and ensure the smooth rotation of the shaft. The four sets of positioning grooves 403 are matched with the four sets of positioning protrusions 401 on the circumferential surface of the shaft body 1, which can realize the precise positioning and reliable connection between the rotor core 3 and the shaft body 1.

[0024] Specifically, through the set stabilizing component 4, the heat dissipation channel 402 of the shaft body 1 is connected to the heat dissipation hole 406 on the inner wall of the rotor core 3, forming a heat dissipation path, avoiding demagnetization of the permanent magnet 405 and performance degradation of the rotor core 3, ensuring long-term stable operation of the motor. Multiple sets of permanent magnets 405 are placed in the rotor core 3 placement slot 404, forming a magnetic circuit with the rotor core 3 to achieve stable power output. The metal sheath 407 protects the rotor core 3 and optimizes the magnetic circuit. The carbon fiber layer 408 enhances the structural strength and counteracts the centrifugal force of high-speed rotation. The two work together with the shaft body 1 and the rotor core 3 to achieve high strength and lightweight of the rotor, improving the stability of motor operation.

[0025] Example 2:

[0026] Please see the appendix Figure 1 Appendix Figure 2 and appendix Figure 5 Furthermore, based on Embodiment 1, a sealing assembly 5 is provided on the outside of the shaft body 1. The sealing assembly 5 includes a sealing sleeve 502. Threaded grooves 501 are provided on the outer walls of both ends of the shaft body 1. Two sets of sealing sleeves 502 are provided. The two sets of sealing sleeves 502 are threadedly connected to the outer walls of the two sets of threaded grooves 501 respectively. A cross rod 503 is fixedly connected to the outer wall of each set of sealing sleeves 502. A sealing block 504 is fixedly installed inside each set of sealing sleeves 502. The sealing block 504 is adapted to the heat dissipation channel 402.

[0027] The inner wall of the sealing sleeve 502 is provided with an internal thread, which is compatible with the thread groove 501. Therefore, the sealing sleeve 502 can be installed on the outer wall of the shaft body 1. The operator can manually turn the cross bar 503 to easily tighten and loosen the sealing sleeve 502.

[0028] Specifically, through the set sealing component 5, the staff connects the threaded grooves 501 on the outer walls of both ends of the shaft body 1 with the sealing sleeves 502. With the matching structure of the sealing block 504 and the heat dissipation channel 402, a double seal is formed. This structure prevents external dust and impurities from entering the heat dissipation channel 402, avoiding channel blockage that could affect the heat dissipation efficiency of the shaft body 1 and the rotor core 3.

[0029] The working principle of this utility model is as follows: This utility model is a high-stability, high-speed motor rotor. First, when the motor is running, the operator installs the bearing 2 on the outer wall of the shaft body 1. The rotor core 3 is precisely matched with the four sets of positioning protrusions 401 on the circumferential surface of the shaft body 1 through four sets of positioning grooves 403, achieving a reliable connection between the two. The operator then installs multiple sets of permanent magnets 405 in the placement grooves 404 on the surface of the rotor core 3, which together with the rotor core 3 form the motor's magnetic circuit. When the motor is powered on, the stator winding generates a rotating magnetic field. The magnetic field generated by the permanent magnets 405 interacts with the rotating magnetic field of the stator winding, generating electromagnetic force that drives the rotor to rotate. During rotation, the heat dissipation channel 402 inside the shaft body 1 is connected to the heat dissipation hole 406 on the inner wall of the rotor core 3, forming a heat dissipation path. The heat generated by the rotor core 3 and the permanent magnet 405 is conducted to the heat dissipation channel 402 through the heat dissipation hole 406. The operator fixes the metal sleeve 407 to the outer wall of the rotor core 3 and covers the outer wall of the metal sleeve 407 with the carbon fiber layer 408. Then, the operator manually screws the cross bar 503 on the outer wall of the sealing sleeve 502 to thread the sealing sleeve 502 to the threaded groove 501 on the outer wall of both ends of the shaft body 1. At the same time, the sealing block 504 is adapted to the heat dissipation channel 402 to form a double sealing structure.

[0030] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A high-stability high-speed motor rotor, comprising a shaft body (1) and a rotor core (3), characterized in that: The outer wall of the shaft body (1) is provided with a bearing (2), the inside and the outer wall of the rotor core (3) are provided with a stabilizing assembly (4), the stabilizing assembly (4) comprises positioning lugs (401) and permanent magnets (405), the four groups of positioning lugs (401) are fixedly connected to the circumferential surface of the shaft body (1) in a circumferential distribution, the inside of the shaft body (1) is provided with a heat dissipation channel (402), and the rotor core (3) is connected with a carbon fiber layer (408) through a metal sheath (407).

2. A high-stability high-speed electric machine rotor according to claim 1, characterized in that: The surface of the rotor core (3) is provided with four groups of positioning grooves (403), the four groups of positioning lugs (401) are matched with the four groups of positioning grooves (403) respectively, and the surface of the rotor core (3) is provided with a plurality of placement grooves (404) distributed in a circle.

3. A high-stability high-speed electric machine rotor according to claim 2, characterized in that: The permanent magnets (405) are provided in a plurality of groups, the plurality of groups of permanent magnets (405) are fixedly installed in the plurality of groups of placement grooves (404) respectively, and the inner wall of the rotor core (3) is provided with a plurality of heat dissipation holes (406) distributed at equal distances.

4. A high stability high speed electric machine rotor according to claim 3, characterized in that: The metal sheath (407) is fixedly installed on the outer wall of the rotor core (3), and the carbon fiber layer (408) is fixedly installed on the outer wall of the metal sheath (407).

5. A high stability high speed electric machine rotor according to claim 4, characterized in that: The outer part of the shaft body (1) is provided with a sealing assembly (5), the sealing assembly (5) comprises a sealing sleeve (502), the outer wall of the two ends of the shaft body (1) is provided with a threaded groove (501), the sealing sleeve (502) is provided in two groups, and the two groups of sealing sleeves (502) are threadedly connected with the outer walls of the two groups of threaded grooves (501) respectively.

6. A high stability high speed electric machine rotor according to claim 5, characterized in that: The outer wall of each of the two groups of sealing sleeves (502) is fixedly connected with a cross rod (503), the inside of each of the two groups of sealing sleeves (502) is fixedly installed with a sealing block (504), and the sealing block (504) is matched with the heat dissipation channel (402).

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