High-performance rotor core structure

Abstract

The utility model discloses a high-performance rotor core structure, which is formed by superposing a plurality of silicon steel sheets, the central position of each silicon steel sheet is provided with a disc part, the disc part is provided with a shaft hole, an opening, a raised line and a connecting narrow strip, the end part of the connecting narrow strip is connected with a tooth part, and a tooth groove is formed between two adjacent tooth parts. The holes are used for weight reduction and heat dissipation, so that the weight of the rotor core can be effectively reduced, the operation efficiency of the motor is improved, the heat dissipation performance is improved, and the service life of the motor is prolonged. The protruding strips are used for positioning and supporting the magnets, the connecting narrow strips are connected with tooth parts, tooth grooves are formed between every two adjacent tooth parts and used for assembling the magnets, and side blocking strips are arranged at the positions, corresponding to openings of the tooth grooves, of the tooth parts, so that the magnets can be assembled more accurately and firmly, the loosening risk of the magnets in the operation process is reduced, and the operation reliability of the motor is improved. The connection narrow strips ensure the connection strength, effectively reduce the connection area of the magnetizers, reduce the magnetic leakage phenomenon, and effectively improve the performance of the rotor.

Description

High-performance rotor core structure Technical Field

[0001] This utility model relates to the field of motor technology, specifically to a high-performance rotor core structure used in high-performance motors. Background Technology

[0002] Currently, the common rotor structures of permanent magnet motors are surface-mounted and internal tangential structures. Compared to surface-mounted structures, internal tangential rotors effectively reduce demagnetization caused by armature reaction and increase the magnetic flux area, improving the constant power speed range of the motor and enhancing performance while improving protection against centrifugal forces during high-speed operation. Internal tangential rotors are composed of stacked silicon steel sheets with several closed slots. Each slot extends radially along the silicon steel sheet and has a predetermined length and width. Because the slots are closed, the magnets in adjacent slots are connected entirely through a magnetic conductor, resulting in significant magnetic leakage during operation and thus reducing rotor performance. Summary of the Invention

[0003] To address the aforementioned shortcomings, the purpose of this utility model is to provide a high-performance rotor core structure with a reasonable structural design that effectively improves rotor performance.

[0004] To achieve the above objectives, the technical solution provided by this utility model is as follows:

[0005] A high-performance rotor core structure is composed of several stacked silicon steel sheets. A disc portion is provided at the center of the silicon steel sheets. A shaft hole is provided at the center of the disc portion. A number of openings are provided symmetrically around the periphery of the shaft hole portion for weight reduction and heat dissipation. Protruding strips and connecting narrow strips are distributed circumferentially on the circumferential surface of the disc portion. The protruding strips are used to position and support magnets. The width of the connecting narrow strips is 0.7-0.9 mm. The ends of the connecting narrow strips are connected to teeth. A tooth groove is formed between two adjacent teeth for assembling magnets. Side stops are provided at the opening positions of the teeth corresponding to the tooth grooves.

[0006] As a preferred embodiment of this utility model, the width of the tooth gradually narrows at the end near the connecting narrow strip to ensure the consistency of the tooth groove width.

[0007] As a preferred embodiment of this utility model, the teeth are provided with acute angled portions protruding towards the disc portion on both sides of the end near the connecting narrow strip, which increases the contact area with the magnet, ensures the stability of the magnet placement, and also helps to guide the magnetic lines of force to the teeth, thereby improving the magnetic performance of the rotor.

[0008] As a preferred embodiment of this utility model, the acute angle is 74 to 76 degrees to ensure structural strength.

[0009] As a preferred embodiment of this utility model, the width of the toothed part near the connecting narrow strip is wider than the width of the connecting narrow strip, so that notches are formed on both sides of the connecting narrow strip, forming a magnetic isolation gap, which also facilitates air circulation and improves heat dissipation.

[0010] As a preferred embodiment of this utility model, the top of the protrusion is flat, which allows the magnet to be placed more stably on the protrusion during assembly, thereby improving the positioning accuracy and stability of the magnet.

[0011] As a preferred embodiment of this utility model, the disc portion, the connecting narrow strip, and the toothed portion are integrally connected, which improves the integrity and rigidity of the rotor core, enabling the rotor to withstand greater centrifugal force when running at high speed, thus ensuring the safety and reliability of the rotor.

[0012] The beneficial effects of this utility model are as follows: The utility model has a reasonable structural design. Several openings are symmetrically arranged around the periphery of the disc for weight reduction and heat dissipation, effectively reducing the weight of the rotor core, improving motor operating efficiency, and simultaneously improving heat dissipation performance and extending motor lifespan. The protruding strips are used to position and support the magnets. The connecting narrow strips have teeth, with grooves formed between adjacent teeth for magnet assembly. Side retaining strips are provided at the opening positions of the teeth corresponding to the grooves. This structural design allows for more precise and secure magnet assembly, reducing the risk of magnet loosening during operation and improving motor reliability. The connecting narrow strips, while ensuring connection strength, effectively reduce the connection area of ​​the magnetic conductor, reducing magnetic leakage and effectively improving rotor performance.

[0013] The present invention will be further described below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0014] Figure 1 is a three-dimensional structural diagram of this utility model.

[0015] Figure 2 is a schematic diagram of the main structure of this utility model.

[0016] Figure 3 is an enlarged schematic diagram of the structure of part A in Figure 2. Detailed Implementation

[0017] Referring to Figures 1, 2, and 3, this embodiment provides a high-performance rotor core structure composed of several stacked silicon steel sheets. A disc portion 1 is located at the center of each silicon steel sheet, and a shaft hole 11 is located at the center of the disc portion 1 for mounting a rotating shaft. Preferably, the shaft holes 11 of a portion of the stacked silicon steel sheets are fitted with the rotating shaft with an interference fit, while the shaft holes 11 of the other portion of the silicon steel sheets are slightly larger than the outer diameter of the rotating shaft and do not contact the outer surface of the rotating shaft. This ensures a secure assembly, reduces friction, facilitates axial insertion of the rotating shaft, and prevents deformation of the rotating shaft due to excessive axial pressure.

[0018] A plurality of openings 12 are symmetrically arranged around the periphery of the shaft hole 11 for weight reduction and heat dissipation. This effectively reduces the weight of the rotor core, improves the motor's operating efficiency, enhances heat dissipation, and extends the motor's service life. In this embodiment, there are seven circular openings 12. In other embodiments, the number of openings 12 may be eight or other numbers.

[0019] The disc portion 1 has raised strips 2 and connecting narrow strips 3 spaced circumferentially on its circumferential surface. In this embodiment, there are fourteen raised strips 2 and fourteen connecting narrow strips 3. The raised strips 2 are used to position and support the magnets. Preferably, the top of the raised strip 2 is flat, so that the magnets can be placed more stably on the raised strips 2 during assembly, effectively improving the positioning accuracy and stability of the magnets.

[0020] The width of the connecting narrow strip 3 is 0.7–0.9 mm, preferably 0.8 mm. The end of the connecting narrow strip 3 is connected to a toothed portion 4, with a groove 5 formed between adjacent teeth 4 for assembling magnets. A side stop 41 is provided at the opening position of the toothed portion 4 corresponding to the groove 5. Preferably, the width of the toothed portion 4 gradually narrows near the end of the connecting narrow strip 3 to ensure the consistency of the groove 5 width. On both sides of the toothed portion 4 near the end of the connecting narrow strip 3, there are acute angled portions 42 protruding towards the disc portion 1. The angle α of the acute angled portion 42 is 74–76 degrees, preferably 75 degrees, to ensure structural strength. The acute angled portion 42 increases the contact area with the magnet, ensuring the stability of the magnet placement, and also helps guide magnetic lines of force to the toothed portion 4, improving the magnetic performance of the rotor.

[0021] The width of the toothed part 4 near the connecting narrow strip 3 is wider than the width of the connecting narrow strip 3, so that notches are formed on both sides of the connecting narrow strip 3, forming a magnetic isolation gap, which also facilitates air circulation and improves heat dissipation.

[0022] The disc portion 1, connecting narrow strip 3, and toothed portion 4 are integrated into a single structure, which improves the integrity and rigidity of the rotor core, enabling the rotor to withstand greater centrifugal force during high-speed operation and ensuring its safety and reliability. Simultaneously, the integrated structure simplifies the rotor assembly process, improves production efficiency, and reduces production costs.

[0023] During production, the magnet is installed into the tooth groove 5. The inner wall of the tooth groove 5, the convex strip 2 and the side stop strip 41 cooperate to make the magnet assembly more precise and firm, reduce the risk of the magnet loosening during operation and improve the reliability of motor operation.

[0024] During operation, the presence of several symmetrically arranged openings 12 around the periphery of the disc section 1 not only reduces the weight of the rotor core and improves the motor's operating efficiency but also enhances heat dissipation. Furthermore, the use of narrow connecting strips 3 ensures connection strength while effectively reducing the connection area of ​​the magnetic conductors, minimizing magnetic leakage, and further improving rotor performance.

[0025] Based on the disclosure and teachings of the above specification, those skilled in the art can make changes and modifications to the above embodiments. Therefore, this utility model is not limited to the specific embodiments disclosed and described above, and some modifications and changes to this utility model should also fall within the protection scope of the claims of this utility model. Furthermore, although some specific terms are used in this specification, these terms are only for convenience of explanation and do not constitute any limitation on this utility model. As described in the above embodiments of this utility model, other rotor structures obtained by using the same or similar structures are all within the protection scope of this utility model.

Claims

1. A high-performance rotor core structure, comprising a plurality of stacked silicon steel sheets, characterized in that, The silicon steel sheet has a disc portion at its center, and a shaft hole is provided at the center of the disc portion. A number of openings are provided symmetrically around the periphery of the shaft hole portion. The disc portion has raised strips and connecting narrow strips distributed at intervals along its circumference. The width of the connecting narrow strips is 0.7 to 0.9 mm. The ends of the connecting narrow strips are connected to teeth, and a tooth groove is formed between two adjacent teeth. A side stop strip is provided at the opening position of the tooth corresponding to the tooth groove.

2. The high-performance rotor core structure according to claim 1, characterized in that: The width of the teeth gradually narrows near the end of the connecting strip.

3. The high-performance rotor core structure according to claim 2, characterized in that: The teeth have sharp angles protruding towards the disc on both sides near the end of the connecting narrow strip.

4. The high-performance rotor core structure according to claim 3, characterized in that: The acute angle is 74 to 76 degrees.

5. The high-performance rotor core structure according to claim 2 or 3, characterized in that: The width of the toothed portion near the end of the connecting strip is wider than the width of the connecting strip, thus creating notches on both sides of the connecting strip.

6. The high-performance rotor core structure according to claim 1, characterized in that: The top of the convex strip is flat.

7. The high-performance rotor core structure according to claim 1, characterized in that: The disc portion, the connecting narrow strip, and the toothed portion are integrally connected structures.

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