High-power small-base-number high-efficiency motor with wind path structure
By designing an airflow structure in the motor and utilizing gaps and axial ventilation channels to form a heat dissipation channel, the problems of large motor size, high material consumption, and poor heat dissipation are solved, achieving the effects of reducing motor size and lowering temperature.
Patent Information
- Application Number
- CN202520413103.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-11
- Publication Date
- 2026-04-03
- Estimated Expiration
- 2035-03-11
AI Technical Summary
In the existing YE4 and YE5 high-efficiency motors, the increased air gap in the axial and radial composite airflow design results in a larger motor size and higher material consumption. Furthermore, the air passes through the air gap between the stator and rotor without entering the interior, affecting ventilation and heat dissipation, leading to increased temperature rise and reduced heat load.
Design a high-power small frame motor with a wind tunnel structure, including a cylindrical hollow frame, rotor, stator core and fan. A heat dissipation channel is formed through a first gap, a first axial ventilation channel, a second gap and a second axial ventilation channel. The fan rotation generates wind pressure to carry out hot air, and the heat is discharged through the surface of the frame.
This has resulted in smaller motor size, reduced material consumption, lower internal temperature, and improved heat dissipation for motor line loads.
Smart Images
Figure CN224083361U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of motor cooling technology and relates to a high-power, small-frame-size, high-efficiency motor with a wind tunnel structure. Background Technology
[0002] The technological level of electric motors is reflected in their durability and improved efficiency. In today's resource-scarce world, people are increasingly aware of the importance of energy conservation, emission reduction, and low-carbon living. Our country is also vigorously promoting energy conservation and emission reduction, and the demand for high-efficiency energy-saving motors is increasing year by year.
[0003] For YE4 and YE5 high-efficiency motors, an axial and radial composite airflow design is adopted to increase the air gap between the stator and rotor to ensure the cooling effect of the stator and rotor. However, while increasing the air gap, it not only causes the motor to be large in size and consume more materials, but also makes it easy for a large amount of air to pass through the air gap between the stator and rotor without entering the stator and rotor. This affects the ventilation, heat dissipation and cooling of the stator and rotor cores and the core section coils, resulting in an increase in the internal temperature of the motor, a reduction in the heat load it can withstand, and a limitation on the motor capacity. Summary of the Invention
[0004] To address the aforementioned problems, this utility model provides a high-power, small-frame-size, high-efficiency motor with a ventilation structure. This not only reduces motor size and material consumption but also lowers the internal temperature and increases the motor's line load through excellent internal ventilation circulation.
[0005] According to the technical solution of this utility model: a high-power, small-frame, high-efficiency motor with a wind tunnel structure includes a cylindrical hollow frame, a motor shaft passing through the frame, a rotor fixed on the motor shaft, a fan fixed at one end of the rotor, and a stator core fixed inside the frame. The rotor is rotatably connected inside the stator core. A first gap and a second gap are respectively left between the rotor and the two ends of the frame. A first axial ventilation channel connecting the first gap and the second gap is provided on the inner side wall of the frame. A second axial ventilation channel connecting the first gap and the second gap is provided inside the rotor. A heat dissipation channel is formed between the first gap, the first axial ventilation channel, the second gap, and the second axial ventilation channel.
[0006] As a further improvement of this utility model, the base includes a cylindrical hollow outer shell, a front end cover fixed to one end of the outer shell, a rear end cover fixed to the other end of the outer shell, the motor shaft passing through the front end cover and the rear end cover, and the first axial ventilation channel is disposed on the inner side wall of the outer shell.
[0007] As a further improvement of this utility model, the outer shell is made of gray cast iron.
[0008] As a further improvement of this utility model, the gap between the front end cover and the rotor is the first gap, and the width of the first gap is not less than 20cm.
[0009] As a further improvement of this utility model, the gap between the rotor and the rear end cover is the second gap, and the width of the second gap is not less than 20cm.
[0010] As a further improvement of this utility model, the outer wall of the stator core is fitted with the inner wall of the outer shell.
[0011] As a further improvement of this utility model, the fan includes a base sleeved on the motor shaft, a fan blade fixed at one end on the base, and one end of the base fixed to one end of the rotor.
[0012] As a further improvement of this utility model, the maximum outer diameter of the fan blade is smaller than the inner diameter of the stator core.
[0013] As a further improvement of this utility model, the second axial ventilation duct is disposed close to the motor shaft.
[0014] As a further improvement of this utility model, the fan is assembled at the terminal of the stator core.
[0015] The technical advantages of this invention are as follows: When the motor is powered on, the fan generates wind pressure as the rotor rotates. The air around the fan passes through the first gap, the first axial ventilation channel, the second gap, and the second axial ventilation channel in sequence, and then returns to the first gap for circulation, carrying out the hot air inside the rotor and transferring the heat to the surface of the base for exhaust. This invention can reduce the size of the motor and reduce motor consumables, and can also reduce the internal temperature of the motor and increase the motor's line load through good internal ventilation circulation. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the structure of this utility model. Detailed Implementation
[0017] The following description, in conjunction with the accompanying drawings, describes specific embodiments of the present invention as further improvements to the present invention.
[0018] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. The described embodiments are merely some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.
[0019] like Figure 1 As shown, this utility model discloses a high-power, small-frame, high-efficiency motor with a ventilation structure, comprising a cylindrical hollow frame, a motor shaft 2 passing through the frame, a rotor 3 fixed on the motor shaft 2, a fan 4 fixed at one end of the rotor 3, and a stator core 5 fixed inside the frame. The rotor 3 is rotatably connected inside the stator core 5. A first gap 6 and a second gap 7 are respectively provided between the rotor 3 and the two ends of the frame. A first axial ventilation channel 9 connecting the first gap 6 and the second gap 7 is provided on the inner side wall of the frame. A second axial ventilation channel 8 connecting the first gap 6 and the second gap 7 is provided inside the rotor 3. A heat dissipation channel is formed between the first gap 6, the first axial ventilation channel 9, the second gap 7, and the second axial ventilation channel 8.
[0020] When the motor is powered on, the fan 4 rotates with the rotor 3 to generate air pressure. The air around the fan 4 will pass through the first gap 6, the first axial ventilation channel 9, the second gap 7 and the second axial ventilation channel 8 in sequence, and then return to the first gap 6 for circulation, carrying out the hot air in the rotor 3 and transferring the heat to the surface of the base for exhaust. This utility model can not only reduce the size of the motor and reduce motor consumables, but also reduce the internal temperature of the motor and increase the motor line load through good internal ventilation circulation.
[0021] The base includes a cylindrical hollow outer shell 101, a front cover 102 fixed to one end of the outer shell 101, and a rear cover 103 fixed to the other end of the outer shell 101. The motor shaft 2 passes through the front cover 102 and the rear cover 103. The first axial ventilation channel 9 is provided on the inner wall of the outer shell 101. In this embodiment, the front cover 102 and the rear cover 103 are connected through the outer shell 101, and the stator core 5 is installed and fixed.
[0022] The outer casing 101 is made of a material with high thermal conductivity; in this embodiment, when the outer casing 101 is made of a material with high thermal conductivity, it is easier to dissipate the heat from the hot air flowing through the first axial ventilation duct 9. In actual production practice, the outer casing 101 is made of gray cast iron HT150.
[0023] The gap between the front cover 102 and the rotor 3 is the first gap 6, and the width of the first gap 6 is not less than 20cm. In this embodiment, when the width of the first gap 6 is not less than 20cm, the hot air in the second axial ventilation duct 8 can more easily enter the first axial ventilation duct 9 through the first gap 6.
[0024] The gap between the rotor 3 and the rear end cover 103 is the second gap 7, and the width of the second gap 7 is not less than 20cm. In this embodiment, when the width of the second gap 7 is not less than 20cm, the cold air in the first axial ventilation duct 9 can more easily enter the second axial ventilation duct 8 through the second gap 7.
[0025] The outer wall of the stator core 5 is in contact with the inner wall of the outer casing 101. In this embodiment, when the outer wall of the stator core 5 is in contact with the inner wall of the outer casing 101, the outer casing 101 can conduct some of the heat from the stator core 5, resulting in a better cooling effect.
[0026] The fan 4 includes a base sleeved on the motor shaft 2, a fan blade fixed at one end on the base, and one end of the base fixed to one end of the rotor 3. In this embodiment, the motor shaft 2 and the rotor 3 are connected by the base, and the fan blade provides a power source for the air in the heat dissipation channel during rotation.
[0027] The maximum outer diameter of the fan blade is smaller than the inner diameter of the stator core 5. In this embodiment, when the maximum outer diameter of the fan blade is smaller than the inner diameter of the stator core 5, the power provided by the fan blade is better.
[0028] The second axial ventilation duct 8 is located close to the motor shaft 2. In this embodiment, the cooling effect of the second axial ventilation duct 8 is better when it is located close to the motor shaft 2.
[0029] The fan 4 is mounted on the terminal of the stator core 5. In this embodiment, since the terminal of the stator core 5 has a higher temperature during use, mounting the fan 4 on the terminal of the stator core 5 will have a better cooling effect on the stator core 5.
[0030] Finally, it should be noted that the above specific embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although this utility model has been described in detail with reference to examples, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the claims of this utility model.
Claims
1. A high-power small-frame number high-efficiency motor with an air path structure, characterized in that: The motor comprises a cylindrical hollow frame, a motor shaft (2) penetrating through the frame, a rotor (3) fixed on the motor shaft (2), a fan (4) fixed on one end of the rotor (3), a stator core (5) fixed in the frame, the rotor (3) being rotatably connected inside the stator core (5), first and second gaps (6, 7) being respectively left between the rotor (3) and two ends of the frame, a first axial air passage (9) being arranged on the inner side wall of the frame and communicating with the first and second gaps (6, 7), a second axial air passage (8) being arranged in the rotor (3) and communicating with the first and second gaps (6, 7), and a heat dissipation channel being formed between the first gap (6), the first axial air passage (9), the second gap (7) and the second axial air passage (8).
2. The high-power small-frame high-efficiency motor with the air path structure according to claim 1, characterized in that: The frame comprises a cylindrical hollow shell (101), a front end cover (102) fixed on one end of the shell (101), and a rear end cover (103) fixed on the other end of the shell (101), the motor shaft (2) penetrating through the front end cover (102) and the rear end cover (103), and the first axial air passage (9) being arranged on the inner side wall of the shell (101).
3. The high-power small-frame high-efficiency motor with the air path structure according to claim 2, characterized in that: The shell (101) is made of gray cast iron.
4. The high-power small- frame high-efficiency motor with air path structure according to claim 2, characterized in that: The gap between the front end cover (102) and the rotor (3) is the first gap (6), and the width of the first gap (6) is not less than 20 cm.
5. The high power small frame number high efficiency motor with air path structure according to claim 2, characterized in that: The gap between the rotor (3) and the rear end cover (103) is the second gap (7), and the width of the second gap (7) is not less than 20 cm.
6. The high power small frame number high efficiency motor with air path structure according to claim 2, characterized in that: The outer side wall of the stator core is attached to the inner side wall of the shell.
7. The high power small frame number high efficiency motor with air path structure according to claim 1, characterized in that: The fan (4) comprises a seat body sleeved on the motor shaft (2) and a fan blade fixed on one end of the seat body, and one end of the seat body is fixed on one end of the rotor (3).
8. The high-power small- frame high-efficiency motor with the air path structure according to claim 7, characterized in that: The maximum outer diameter of the fan blade is smaller than the inner diameter of the stator core.
9. The high power small frame number high efficiency motor with air path structure according to claim 1, characterized in that: The second axial air passage (8) is arranged close to the motor shaft (2).
10. The high power small frame number high efficiency motor with air path structure according to claim 1, characterized in that: The fan is assembled to the wiring end of the stator core (5).