High-heat-dissipation motor rotor
The innovative rotor design with multi-layered blades and internal ventilation channels addresses the heat dissipation issues in electric motors, achieving improved cooling performance and longevity through enhanced airflow and internal cooling.
Patent Information
- Application Number
- CN202422258602.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-13
- Publication Date
- 2025-07-15
- Estimated Expiration
- 2034-09-13
AI Technical Summary
The heat dissipation performance of existing motor rotors is insufficient, resulting in an increase in temperature, affecting the performance and life of the motor.
A high-heat-dissipation motor rotor is designed. By setting up multi-layer heat dissipation blades and ventilation ducts on the rotor, a complex airflow channel is formed, which increases the air volume and air pressure, expands the heat dissipation area, and vents and thermal conduction strips are installed on the silicon steel sheet to enhance the heat dissipation effect.
It realizes rapid heat dissipation of the rotor, improves heat dissipation efficiency and effect, reduces temperature, and ensures stable operation of the motor.
Smart Images
Figure CN223109746U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to an electric motor rotor, in particular to a high heat dissipation electric motor rotor. Background Art
[0002] The electric motor rotor refers to the rotating part in the electric motor, which provides a magnetic field for the armature of the electric motor and is a conversion device for realizing the conversion between electrical energy and mechanical energy. When the electric motor is working, the rotor will generate heat. If the heat dissipation is poor, the temperature will rise, affecting the performance and service life of the electric motor. Therefore, the heat dissipation requirements and design of the electric motor rotor are the key factors to ensure the efficient and stable operation of the electric motor.
[0003] Generally, the heat dissipation conductor of an electric motor is natural wind. The natural wind is sucked in from the rear end of the electric motor by a fan, passes through the armature of the electric motor, and takes the natural wind as a carrier to discharge the generated heat from the front end. However, the existing fan structure is relatively simple and single. Due to limited space, the air volume is small. Moreover, the air gap between the electric motor rotor and the stator is very small, and there are few ventilation channels and small channel areas in the rotor, only dissipating heat from the outside of the electric motor rotor. The heat dissipation range is small, and the ventilation volume inside the electric motor is very limited, affecting the heat dissipation performance of the electric motor. Summary of the Utility Model
[0004] The purpose of the utility model is to provide a high heat dissipation electric motor rotor. The utility model has the characteristics of increasing the heat dissipation air volume and area and improving the heat dissipation effect.
[0005] The technical solution of the utility model: A high heat dissipation electric motor rotor includes a rotor shaft and a rotor body. The rotor body includes a rotor core composed of silicon steel sheets. End rings are provided at both ends of the rotor core. A plurality of first heat dissipation blades are provided on the circumferential outer side surface of the end ring, and a ventilation duct penetrating through the two end rings is provided between two adjacent first heat dissipation blades; A ring-shaped mounting frame is provided at the tail end of the rotor shaft. A plurality of second heat dissipation blades connected to the rotor shaft are provided on the circumferential inner ring part of the mounting frame, and a plurality of third heat dissipation blades are provided on the circumferential outer ring part of the mounting frame.
[0006] In the aforementioned high heat dissipation electric motor rotor, a plurality of ventilation holes communicating with the central shaft hole are provided on the circumferential inner side of the silicon steel sheet. A plurality of positioning protrusions are symmetrically distributed on the inner ring surface of the silicon steel sheet, and a plurality of staggered winding grooves and ventilation grooves are provided on the circumferential outer ring surface of the silicon steel sheet.
[0007] In the aforementioned high heat dissipation electric motor rotor, a heat conduction strip is provided in the ventilation groove. The heat conduction strip is in a T shape, and a gap is left between the heat conduction strip and the ventilation groove.
[0008] In the aforementioned high heat dissipation motor rotor, both the second heat dissipation blade and the third heat dissipation blade are in a sickle shape with a smaller inner end and a larger outer end. One corner at the outer edge of the third heat dissipation blade is a rounded corner greater than 120°, and the other corner is an acute angle less than 30°.
[0009] In the aforementioned high heat dissipation motor rotor, the area of the second heat dissipation blade is smaller than that of the third heat dissipation blade, and the number of the second heat dissipation blades is less than that of the third heat dissipation blades.
[0010] In the aforementioned high heat dissipation motor rotor, multiple wave-shaped heat dissipation grooves are provided on the surface of the first heat dissipation blade.
[0011] Compared with the prior art, the beneficial effects of the present utility model are as follows:
[0012] In the present utility model, the first heat dissipation blade, the second heat dissipation blade, and the third heat dissipation blade form a multi-layer structure that rotates synchronously, increasing the air volume and air pressure, forming a large amount of air flow outside the rotor, and quickly taking away the heat outside the rotor; multiple ventilation ducts are provided on the end ring, and the cooling air flow can pass through the ventilation ducts to penetrate the inside of the rotor body, thereby taking away the heat inside the rotor. Therefore, the present application dissipates heat from both the inside and the outside of the rotor, expands the heat dissipation area, and improves the heat dissipation efficiency and effect of the rotor. Description of the Drawings
[0013] Figure 1 is a schematic structural diagram of the present utility model.
[0014] Figure 2 is a schematic structural diagram of the end ring.
[0015] Figure 3 is a schematic structural diagram of the silicon steel sheet.
[0016] Figure 4 is a schematic structural diagram of the mounting bracket.
[0017] Figure 5 is a schematic structural diagram of the first heat dissipation blade.
[0018] The reference signs in the drawings are: 1, rotor shaft; 11, mounting bracket; 12, second heat dissipation blade; 13, third heat dissipation blade; 2, rotor core; 21, silicon steel sheet; 22, ventilation hole; 23, positioning convex block; 24, winding groove; 25, ventilation groove; 26, heat conduction strip; 3, end ring; 31, first heat dissipation blade; 32, ventilation duct; 33, heat dissipation groove. Detailed Embodiments
[0019] The present utility model will be further described below with reference to the drawings and embodiments, but it shall not be used as a basis for limiting the present utility model.
[0020] In the description of the present utility model, it should also be noted that, unless otherwise clearly specified and defined, the terms "arranged", "installed", "connected", and "coupled" should be understood in a broad sense. For example, it 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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.
[0021] Embodiment:
[0022] As Figures 1 - 5 shown, a high heat dissipation motor rotor includes a rotor shaft 1 and a rotor body. The rotor body includes a rotor core 2 composed of silicon steel sheets 21. End rings 3 are provided at both ends of the rotor core 2. A plurality of first heat dissipation blades 31 are provided on the outer circumferential surface of the end ring 3. A ventilation duct 32 passing through the two end rings 3 is provided between two adjacent first heat dissipation blades 31; an annular mounting frame 11 is provided at the tail end of the rotor shaft 1. A plurality of second heat dissipation blades 12 connected to the rotor shaft 1 are provided on the inner circumferential part of the mounting frame 11. A plurality of third heat dissipation blades 13 are provided on the outer circumferential part of the mounting frame 11.
[0023] During the rotation of the rotor, the first heat dissipation blades 31, the second heat dissipation blades 12, and the third heat dissipation blades 13 are driven to rotate synchronously, forming an air flow outside the rotor to take away the heat outside the rotor; and the first heat dissipation blades 31, the second heat dissipation blades 12, and the third heat dissipation blades 13 form a multi-layer structure, increasing the air volume and air pressure, accelerating the air flow velocity, and improving the heat dissipation efficiency; the first heat dissipation blades 31, the second heat dissipation blades 12, and the third heat dissipation blades 13 are in different positions, expanding the air flow range and improving the heat dissipation effect; a plurality of ventilation ducts 32 are also provided on the end ring 3, and the cooling air flow can pass through the ventilation ducts through the inside of the rotor body, thereby taking away the heat inside the rotor and improving the heat dissipation effect of the rotor.
[0024] A plurality of ventilation holes 22 communicating with the central shaft hole are provided on the inner circumferential surface of the silicon steel sheet 21. A plurality of positioning convex blocks 23 are symmetrically distributed on the inner ring surface of the silicon steel sheet 21. A plurality of alternately distributed winding grooves 24 and ventilation grooves 25 are provided on the outer circumferential surface of the silicon steel sheet 21. The ventilation holes 22 provided on the silicon steel sheet 21 form a ventilation and heat dissipation channel for the cooling air between the rotor body and the rotor shaft 1. The ventilation grooves 25 on the silicon steel sheet 21 form a ventilation and heat dissipation channel for the cooling air between the silicon steel sheet 21 and the motor stator, thereby expanding the space for air circulation and taking away more heat from various parts of the motor from both inside and outside, improving the heat dissipation capacity of the rotor. And the positioning convex blocks 23 on the silicon steel sheet 21 are engaged with the key grooves on the rotor shaft 1 for positioning, improving the connection stability between the rotor shaft 1 and the rotor.
[0025] A heat-conducting strip 26 is provided in the ventilation groove 25. The heat-conducting strip 26 is in a T shape, and a gap is left between the heat-conducting strip 26 and the ventilation groove 25. The provided heat-conducting strip 26 conducts heat, and being in a T shape expands the heat-conducting area. A gap is reserved between the heat-conducting strip 26 and the ventilation groove 25 for air flow, improving the heat dissipation effect.
[0026] Both the second heat dissipation blades 12 and the third heat dissipation blades 13 are in a sickle shape with a smaller inner end and a larger outer end, optimizing the air flow direction and reducing the load. One corner at the outer edge of the third heat dissipation blade 13 is a rounded corner greater than 120°, and the other end is an acute angle less than 30°. The third heat dissipation blade 13 is located at the outermost side of the rotor. One end of the outer edge has a larger rounded corner, which can increase the wind speed. The other end has an acute angle less than 30°, reducing the impact on the air flow, reducing the generation of air flow vortices and backflows, and reducing the generation of noise.
[0027] The area of the second heat dissipation blade 12 is smaller than that of the third heat dissipation blade 13, and the number of the second heat dissipation blades 12 is less than that of the third heat dissipation blades 13. The large area of the third heat dissipation blade 13 increases the air volume, and the small second heat dissipation area reduces the load.
[0028] Multiple wave-shaped heat dissipation grooves 33 are provided on the surface of the first heat dissipation blade 31. The contact area between the air flow and the first heat dissipation blade 31 is increased, improving the heat dissipation effect.
[0029] Parts not detailed in the present utility model are prior arts and thus will not be specifically described herein.
Claims
1. A high heat dissipation motor rotor, comprising a rotor shaft (1) and a rotor body. The rotor body includes a rotor core (2) composed of silicon steel sheets (21). End rings (3) are provided at both ends of the rotor core (2). It is characterized in that: The outer circumferential surface of the end ring (3) is provided with a plurality of first heat dissipation fins (31), and a ventilation duct (32) penetrating through the two end rings (3) is provided between two adjacent first heat dissipation fins (31); the tail end of the rotor shaft (1) is provided with an annular mounting frame (11), and the inner circumferential part of the mounting frame (11) is provided with a plurality of second heat dissipation fins (12) connected to the rotor shaft (1), and the outer circumferential part of the mounting frame (11) is provided with a plurality of third heat dissipation fins (13).
2. A high heat dissipation motor rotor according to claim 1, characterized in that: The inner circumferential surface of the silicon steel sheet (21) is provided with a plurality of ventilation holes (22) communicated with the central shaft hole, a plurality of positioning bumps (23) are symmetrically distributed on the inner ring surface of the silicon steel sheet (21), and a plurality of staggeredly distributed winding grooves (24) and ventilation grooves (25) are provided on the outer circumferential surface of the silicon steel sheet (21).
3. The high heat dissipation motor rotor according to claim 2, characterized in that: A heat conducting strip (26) is arranged in the ventilation groove (25), the heat conducting strip (26) is in a T shape, and a gap is left between the heat conducting strip (26) and the ventilation groove (25).
4. A high heat dissipation motor rotor according to claim 1, characterized in that: Both the second heat dissipation fins (12) and the third heat dissipation fins (13) are in a sickle shape with a smaller inner end and a larger outer end, and one corner of the outer edge of the third heat dissipation fin (13) is a rounded corner greater than 120°, and the other corner is an acute angle less than 30°.
5. A high heat dissipation motor rotor according to claim 1, characterized in that: The area of the second heat dissipation fin (12) is smaller than that of the third heat dissipation fin (13), and the number of the second heat dissipation fins (12) is less than that of the third heat dissipation fins (13).
6. The high heat dissipation motor rotor according to claim 1, wherein: The surface of the first heat dissipation fin (31) is provided with a plurality of wavy heat dissipation grooves (33).