High-voltage high-efficiency compact three-phase asynchronous motor
By designing the air guide assembly and fan system in a three-phase asynchronous motor, a multi-channel structure is formed, the problem of poor heat dissipation of the motor is solved, efficient heat derivation and temperature reduction are achieved, and the efficiency and service life of the motor are improved.
Patent Information
- Application Number
- CN202421647665.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-11
- Publication Date
- 2025-07-22
- Estimated Expiration
- 2034-07-11
Smart Images
Figure CN223141693U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of motors, and more particularly, to a high-voltage, high-efficiency, compact three-phase asynchronous motor. Background Art
[0002] During the operation of a three-phase asynchronous motor, heat is generated. If this heat cannot be effectively dissipated, the internal temperature of the motor will rise, i.e., the temperature rise is too high. An excessive temperature rise will accelerate the aging of the insulating material inside the motor, increase the resistance of the conductor, etc., thereby reducing the efficiency and service life of the motor. Therefore, a certain heat dissipation method (such as setting heat sinks, cooling fans, etc.) is usually adopted to dissipate heat from the motor. However, the current heat dissipation method for the motor has a poor heat dissipation effect, and it is difficult to take away the heat inside the motor, which still causes a large temperature rise in the motor. Summary of the Utility Model
[0003] The main purpose of this application is to provide a high-voltage, high-efficiency, compact three-phase asynchronous motor to solve the problems of poor heat dissipation effect of the motor and difficulty in taking away the heat inside the motor in the background art.
[0004] According to one aspect of this application, a high-voltage, high-efficiency, compact three-phase asynchronous motor is provided, including:
[0005] A housing, in which an installation cavity and a first ventilation duct are provided, and the first ventilation duct is located outside the installation cavity;
[0006] An electromagnetic interaction component, which is installed in the installation cavity and divides the installation cavity into a first chamber and a second chamber. The first chamber is located on one side of the electromagnetic interaction component along a first direction and is communicated with the first ventilation duct. The second chamber is located on the other side of the electromagnetic interaction component along the first direction. The electromagnetic interaction component includes a stator component and a rotor component. The rotor component is rotatably connected to the housing and is in clearance fit with the stator component, and there is a first gap between the rotor component and the stator component. A second ventilation duct is provided inside the rotor component, and the first gap and the second ventilation duct communicate the first chamber and the second chamber respectively;
[0007] A wind guiding component, which is installed in the second chamber and divides the second chamber into a first channel and a second channel. The first channel communicates the first gap, the second ventilation duct, and the second channel, and the second channel is communicated with the first ventilation duct. The wind guiding component is used to guide the air in the first channel to the second channel.
[0008] Further, a first opening is provided on the side wall between the first ventilation passage and the second chamber, the first gap is closer to the first opening than the second ventilation passage, and the air guide assembly includes:
[0009] a wind shield installed between the first gap and the first opening;
[0010] A first fan is installed on the rotor component and is located on a side of the wind shield close to the first gap. The first fan and the wind shield separate the second chamber into the first channel and the second channel. The second channel is connected to the first opening.
[0011] Further, the stator component comprises a stator core and a winding coil, the winding coil is mounted on the stator core and protrudes from opposite ends of the stator core along a first direction, and a mounting hole is provided in the stator core;
[0012] The rotor component includes a rotating shaft and a rotor core, the rotor core is installed on the rotating shaft and located in the mounting hole, the second ventilation duct is arranged in the rotor core, the first gap is located between the rotor core and the stator core and is located on the side of the winding coil away from the first opening, the opposite ends of the rotating shaft extend out of the stator component and are rotatably connected to the casing respectively, the wind shield is installed at the end of the winding coil away from the stator core and is located on the side of the first opening close to the stator core, and the first fan is installed on the rotating shaft and offset from the wind shield.
[0013] Furthermore, the wind shield comprises:
[0014] A first annular wind shielding ring, which is sleeved on the outer side of the winding coil away from the rotating shaft and is located on a side of the first opening close to the stator core;
[0015] a second annular wind shielding ring, wherein a avoidance hole for the rotating shaft to pass through is arranged in the second annular wind shielding ring, the second annular wind shielding ring is sleeved on the inner side of the winding coil close to the rotating shaft, the first fan is located in the avoidance hole and has a second gap with the inner wall surface of the avoidance hole;
[0016] A sealing block is installed between the first annular wind shielding ring and the second annular wind shielding ring and is located in the gap of the winding coil.
[0017] Furthermore, a balancing structure is provided on the rotating shaft, and the balancing structure is located in the first chamber. Along the first direction, the projected outer contour of the balancing structure is offset from the projected outer contour of the second ventilation duct.
[0018] Furthermore, the balance structure includes:
[0019] A clamping groove which is circumferentially arranged around the rotating shaft on the rotating shaft;
[0020] Balance blocks, including multiple pieces, which are respectively clamped in the clamping grooves.
[0021] Furthermore, it further includes:
[0022] A cooling component which is installed on the housing and is used to reduce the heat in the first ventilation duct.
[0023] Furthermore, the cooling component includes:
[0024] Air guide pipes, including multiple pieces, which are installed in the first ventilation duct and are spaced apart from each other, and the ports at both opposite ends of the air guide pipes communicate with the outside of the housing;
[0025] A second fan which is installed on the housing and can blow air into the air guide pipes.
[0026] Furthermore, there is a third gap between the side of the first annular wind shield away from the winding coil and the inner wall surface of the installation cavity. Along the radial direction of the rotating shaft, the size of the third gap is not greater than 3 mm; and / or, the air guide component further includes:
[0027] A sealing plug whose size is adapted to the third gap and is installed in the third gap.
[0028] Furthermore, the first fan includes one of a centrifugal fan and an axial flow fan.
[0029] The electromagnetic interaction component of the high-voltage, high-efficiency, and compact three-phase asynchronous motor provided in this application divides the installation cavity of the housing into a first chamber and a second chamber. Among them, an air guide component is arranged in the second chamber, and the air guide component divides the second chamber into a first channel and a second channel. The first gap between the stator component and the rotor component and the second ventilation duct in the rotor component communicate with the first chamber and the second chamber respectively, and the first channel communicates with the first gap, the second ventilation duct, and the second channel. During the process of the air guide component guiding the air in the first channel to the second channel, the hot air in the first gap enters the first channel and is then guided to the second channel through the air guide component, so as to guide the hot air to the first ventilation duct outside the installation cavity through the second channel for cooling. The cooled cold air circulates into the first chamber, and then enters the first gap and the second ventilation duct again from the first chamber to cool the stator component and the rotor component.
[0030] Since the first gap and the second ventilation duct are located between the first chamber and the first channel and are not directly connected to the first ventilation duct, when the hot air in the second channel enters the first ventilation duct, the hot air is not likely to flow back into the first channel and then enter the first gap and the second ventilation duct. This not only enables the heat in the first gap to be taken away in time and cooled through the first ventilation duct, but also prevents the hot air from entering the first chamber through the first gap and then re-entering the second ventilation duct or directly entering the second ventilation duct for circulation. Therefore, after the heat in the first gap and the second ventilation duct can be diverted to the second channel by the air guiding component, it can be timely conducted to the first ventilation duct through the second channel for effective cooling, so that the cooled cold air enters the first chamber to effectively cool the motor, thereby effectively reducing the temperature rise, iron loss, copper loss, etc. of the stator component and the rotor component, and improving the electrical efficiency and service life of the motor. Therefore, the setting of the air guiding component in this application can effectively take away the heat in the motor, thereby reducing the overall temperature inside the motor and improving the heat dissipation effect of the motor. Description of the Drawings
[0031] The drawings described herein are used to provide a further understanding of the present application and form a part of the present application. The schematic embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation to the present application. In the drawings:
[0032] Figure 1 is a schematic structural diagram of a high-voltage, high-efficiency, compact three-phase asynchronous motor provided by an embodiment of the present utility model;
[0033] Figure 2 is Figure 1 an enlarged schematic diagram of part A in
[0034] Figure 3 is a side view of the high-voltage, high-efficiency, compact three-phase asynchronous motor.
[0035] Among them, the above-mentioned drawings include the following reference numerals:
[0036] 10, housing; 11, installation cavity; 111, first chamber; 112, second chamber; 121, first channel; 122, second channel; 12, first ventilation duct; 13, first opening; 14, second opening; 15, installation groove; 16, air duct; 17, second fan; 18, heat sink; 20, stator component; 21, stator core; 22, winding coil; 23, first gap; 30, rotor component; 31, rotating shaft; 311, clamping groove; 32, rotor core; 321, second ventilation duct; 40, air guiding component; 41, wind blocking member; 411, first annular wind blocking ring; 4111, third gap; 412, second annular wind blocking ring; 413, sealing block; 42, first fan; 421, second gap. Detailed Embodiments
[0037] It should be noted that, without conflict, the embodiments in this application and the features in the embodiments can be combined with each other. The following will describe this application in detail with reference to the drawings and in combination with the embodiments.
[0038] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to this application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or their combinations.
[0039] Unless otherwise specifically stated, the relative arrangements of the components and steps set forth in these embodiments, numerical expressions, and numerical values do not limit the scope of this application. At the same time, it should be understood that, for the sake of convenience of description, the dimensions of the various parts shown in the drawings are not drawn in actual proportional relationships. Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and devices should be regarded as part of the authorized specification. In all the examples shown and discussed here, any specific value should be construed as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that: similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further discussed in the subsequent drawings.
[0040] To achieve the heat dissipation of the motor and thus reduce the temperature rise of the motor, when dissipating heat from the motor, the motor can be cooled through the internal air path. The internal air path heat dissipation mainly drives a part of the hot air through the internal fan and cools it down through at least four ventilation ducts provided on the machine base, and then takes away the heat of the coil and the rotor core 32 part through the ventilation holes at the coil end and inside the rotor. However, another part of the hot air of the internal fan easily enters the rotor ventilation hole through the gap between the stator and the rotor for circulation, and this circulating heat cannot exchange heat, which has little effect on the internal heat dissipation of the motor.
[0041] In view of the problem that the heat dissipation effect of the motor's heat dissipation method is not good and the heat inside the motor is difficult to be taken away, the first embodiment of the present invention provides a high-voltage, high-efficiency, compact three-phase asynchronous motor. Please refer to Figures 1 to 3, the high-voltage, high-efficiency, and compact three-phase asynchronous motor includes a motor housing 10, an electromagnetic interaction component, and an air guiding component 40. An installation cavity 11 and a first ventilation duct 12 are provided inside the motor housing 10. The first ventilation duct 12 is located outside the installation cavity 11 and can cool the heat carried by the hot air from the installation cavity 11. In this embodiment, a heat sink 18 and an external fan (i.e., the second fan 17 mentioned below in this embodiment) can be provided outside the motor to form an external air path for dissipating heat from the motor, thereby assisting the first ventilation duct 12 to improve the heat dissipation effect of the motor.
[0042] The electromagnetic interaction component is installed in the installation cavity 11 and divides the installation cavity 11 into a first chamber 111 and a second chamber 112. The first chamber 111 is located on one side of the electromagnetic interaction component along a first direction and is in communication with the first ventilation duct 12, so that the cold air cooled by the first ventilation duct 12 can enter the first chamber 111 to cool the electromagnetic interaction component. The second chamber 112 is located on the other side of the electromagnetic interaction component along the first direction. The first direction in this embodiment is the direction indicated by the arrow X as shown in Figure 1 the axial direction of the rotating shaft 31. The electromagnetic interaction component includes a stator component 20 and a rotor component 30. The rotor component 30 is rotatably connected to the motor housing 10 and has a clearance fit with the stator component 20, and there is a first gap 23 between the rotor component 30 and the stator component 20. Specifically, an installation hole is provided inside the stator component 20, and the rotor component 30 is rotatably connected to the motor housing 10 and passes through the installation hole. The first gap 23 is located between the rotor component 30 and the inner wall surface of the installation hole. A second ventilation duct 321 is provided inside the rotor component 30. The first gap 23 and the second ventilation duct 321 are respectively in communication with the first chamber 111 and the second chamber 112. Thus, the cold air in the first chamber 111 can enter the first gap 23 and the second ventilation duct 321 to cool the heat generated by the stator component 20 and the rotor component 30. After the hot air coming out of the first gap 23 and the second ventilation duct 321 enters the second chamber 112, the hot air can be transported to the first ventilation duct 12 through the second chamber 112 for cooling.
[0043] Among them, to prevent a part of the hot air before entering the first ventilation duct 12 in the second chamber 112 from flowing back to the first gap 23 and the second ventilation duct 321, the air guiding assembly 40 in this embodiment is installed in the second chamber 112 and divides the second chamber 112 into a first channel 121 and a second channel 122. The first channel 121 communicates with the first gap 23, the second ventilation duct 321, and the second channel 122. That is, after the hot air in the first gap 23 and the second ventilation duct 321 enters the first channel 121, it then enters the second channel 122. The second channel 122 communicates with the first ventilation duct 12, and the air guiding assembly 40 is used to guide the air in the first channel 121 to the second channel 122. After the hot air enters the second channel 122, the second channel 122 conveys the hot air to the first ventilation duct 12 for cooling. The cooled cold air then enters the first chamber 111 again to cool the stator component 20 and the rotor component 30. Since the first gap 23 and the second ventilation duct 321 are connected through the first channel 121 and the second channel 122, after the air guiding assembly 40 guides the hot air in the first channel 121 to the first channel 121, the hot air before entering the first ventilation duct 12 from the first channel 121 is not likely to flow back to the first channel 121, and thus will not flow back to the first gap 23 and the second ventilation duct 321 for circulation. Therefore, the heat dissipation effect of the motor can be greatly improved, and the heat in the rotor component 30 and the stator component 20 can be effectively removed.
[0044] The electromagnetic interaction component of the motor provided in this application divides the installation cavity 11 of the housing 10 into a first chamber 111 and a second chamber 112. Among them, an air guiding assembly 40 is provided in the second chamber 112. The air guiding assembly 40 divides the second chamber 112 into a first channel 121 and a second channel 122. The first gap 23 between the stator component 20 and the rotor component 30, and the second ventilation duct 321 in the rotor component 30 communicate with the first chamber 111 and the second chamber 112 respectively. The first channel 121 communicates with the first gap 23, the second ventilation duct 321, and the second channel 122. During the process of the air guiding assembly 40 guiding the air in the first channel 121 to the second channel 122, the hot air in the first gap 23 enters the first channel 121 and is then guided to the second channel 122 through the air guiding assembly 40, so as to guide the hot air to the first ventilation duct 12 outside the installation cavity 11 through the second channel 122 for cooling. The cooled cold air circulates into the first chamber 111, and then enters the first gap 23 and the second ventilation duct 321 again from the first chamber 111 to cool the stator component 20 and the rotor component 30.
[0045] Since the first gap 23 and the second ventilation duct 321 are located between the first chamber 111 and the first channel 121 and are not directly connected to the first ventilation duct 12, during the process of the hot air in the second channel 122 entering the first ventilation duct 12, the hot air is not easily refluxed to the first channel 121 and then enters the first gap 23 and the second ventilation duct 321. This not only enables the heat in the first gap 23 to be taken away in time and cooled through the first ventilation duct 12, but also prevents the hot air from entering the first chamber 111 through the first gap 23 and then entering the second ventilation duct 321 again or directly entering the second ventilation duct 321 for circulation. Therefore, after the heat in the first gap 23 and the second ventilation duct 321 can be diverted by the air guiding component 40 to the second channel 122, it can be timely conducted to the first ventilation duct 12 through the second channel 122 for effective cooling, so that the cooled cold air enters the first chamber 111 to effectively cool the motor, thereby effectively reducing the temperature rise, iron loss, copper loss, etc. of the stator component 20 and the rotor component 30, and improving the electrical efficiency and service life of the motor. Therefore, the setting of the air guiding component 40 in this application can effectively take away the heat in the motor, thereby reducing the overall temperature inside the motor and improving the heat dissipation effect of the motor.
[0046] Among them, a first opening 13 is provided on the side wall between the first ventilation duct 12 and the second chamber 112, and the first gap 23 is closer to the first opening 13 than the second ventilation duct 321. The air guiding assembly 40 in this embodiment includes a wind blocking member 41 and a first fan 42. The wind blocking member 41 is installed between the first gap 23 and the first opening 13, so that the hot air before entering the first ventilation duct 12 through the first opening 13 is blocked by the wind blocking member, avoiding part of the hot air from entering the second ventilation duct 321 through the first gap 23 for circulation. The first fan 42 is installed on the rotor component 30 and is located on the side of the wind blocking member 41 close to the first gap 23. The first fan 42 and the wind blocking member 41 divide the second chamber 112 into a first channel 121 and a second channel 122, and the second channel 122 communicates with the first opening 13. After the first fan 42 is turned on, it can blow the hot air entering the first channel 121 from the first gap 23 and the second ventilation duct 321 to the second channel 122, and then convey the hot air to the first ventilation duct 12 along the first opening 13 through the second channel 122. During this process, since the wind blocking member 41 is installed between the first gap 23 close to the first opening 13 and the first opening 13, the wind blocking member 41 can block the hot air before entering the second opening 14, so as to avoid the hot air from flowing back into the first channel 121, and further avoid the hot air from entering the first gap 23 and the second ventilation duct 321 for circulation, realizing effectively blowing the heat generated in the stator component 20 and the rotor component 30 into the first air duct for heat dissipation by the first fan 42. A second opening 14 is further provided on the side wall between the first ventilation duct 12 and the first chamber 111. The second opening 14 communicates the first ventilation duct 12 and the first chamber 111, so that the cold air in the first ventilation duct 12 can enter the first chamber 111 along the second opening 14 to cool the electromagnetic interaction component.
[0047] Please refer to Figure 1, in this embodiment, the stator component 20 includes a stator core 21 and a winding coil 22. The winding coil 22 is installed on the stator core 21 and protrudes from opposite ends of the stator core 21 along the first direction, and the mounting holes are provided in the stator core 21. The rotor component 30 includes a rotating shaft 31 and a rotor core 32. The rotor core 32 is installed on the rotating shaft 31 and is located within the mounting holes. The second ventilation duct 321 is provided within the rotor core 32. The first gap 23 is located between the rotor core 32 and the stator core 21 and on the side of the winding coil 22 away from the first opening 13. Opposite ends of the rotating shaft 31 extend out of the stator component 20 and are respectively rotatably connected to the housing 10. The wind shield 41 is installed at the end of the winding coil 22 away from the stator core 21 and on the side of the first opening 13 close to the stator core 21. The first fan 42 is installed on the rotating shaft 31 and is misaligned with the wind shield 41 so that the wind shield 41 does not interfere with the rotation of the first fan 42 along with the rotating shaft 31. In this embodiment, the wind shield 41 is installed on the winding coil 22 and on the side of the first opening 13 close to the stator core 21, so that the wind shield 41 separates the first opening 13 and the first gap 23. When the hot air moves towards the stator core 21 under the action of inertia, it will be intercepted by the wind shield 41 in time, thus preventing the hot air from entering the first channel 121. Moreover, the intercepted hot air will enter the first ventilation duct 12 along the first opening 13 under the action of the wind force provided by the first fan 42, effectively improving the heat dissipation efficiency and effect of the motor. In this embodiment, the wind shield 41 is installed on the winding coil 22 to separate the first gap 23 and the first opening 13, and the hot air in the first gap 23 and the second ventilation duct 321 is blown into the second channel 122 by the first fan 42 installed on the rotating shaft 31, and then enters the first ventilation duct 12 from the second channel 122 for cooling. While improving the heat dissipation effect of the motor, the wind shield 41 and the first fan 42 are convenient to assemble, and the air guiding component 40 can be assembled without special modification of the electromagnetic interaction component, ensuring the structural reliability of the motor.
[0048] Please refer to Figure 2, in this embodiment, the wind shield 41 includes a first annular wind shield ring 411, a second annular wind shield ring 412, and a sealing block 413. The first annular wind shield ring 411 is sleeved on the outer side of the winding coil 22 facing away from the rotating shaft 31 and is located on the side of the first opening 13 close to the stator core 21, so as to separate the first opening 13 and the first gap 23 through the first annular wind shield ring 411, and prevent the hot air before entering the first ventilation duct 12 along the first opening 13 from flowing back to the first gap 23. Among them, along the direction perpendicular to the axis of the rotating shaft 31, the projected outer contour of the first annular wind shield ring 411 is located between the projected outer contour of the stator core 21 and the projected outer contour of the first opening 13. The second annular wind shield ring 412 is provided with an avoidance hole for the rotating shaft 31 to pass through to avoid interference with the rotational movement of the rotating shaft 31 by the second annular wind shield ring 412. The second annular wind shield ring 412 is sleeved on the inner side of the winding coil 22 close to the rotating shaft 31. The first fan 42 is located in the avoidance hole and has a second gap 421 with the inner wall surface of the avoidance hole, so as to avoid interference with the first fan 42 by the second annular wind shield ring 412. The sealing block 413 is installed between the first annular wind shield ring 411 and the second annular wind shield ring 412 and is located in the gap of the winding coil 22 to prevent hot air from entering the first gap 23 along the gap of the winding coil 22 between the first annular wind shield ring 411 and the second annular wind shield ring 412.
[0049] The sealing block 413 in this embodiment is preferably made of felt. Since felt has a porous structure and certain resilience, it can not only be easily cut into dimensions and shapes adapted to the shape of the gap in the winding coil 22, so as to meet the sealing performance of the gap in the winding coil 22. Felt can also maintain a constant sealing pressure in a sealing environment with a relatively large vibration intensity and a relatively harsh environment such as an electric motor, effectively blocking hot air. Moreover, the felt structure is stable, not easy to loosen, and has a strong ability to withstand temperature changes. Even after long-term use in an environment with hot air inside the electric motor, it can still maintain its shape and performance, thereby reducing the maintenance cost of the wind shield 41 and being economical and practical. During installation, the felt can be firmly bonded to the gap of the winding coil 22 through sealant, etc., and the operation is simple and convenient.
[0050] In this embodiment, when the first annular wind shield 411 is sleeved outside the winding coil 22, the first annular wind shield 411 can be firmly tied to the winding coil 22 by a tying wire such as a polyester-glass tape. Similarly, when the second annular wind shield 412 is sleeved inside the winding coil 22, the second annular wind shield 412 can also be firmly tied to the winding coil 22 by a tying wire such as a polyester-glass tape. In view of the gap existing in the main body part of the winding coil 22 between the first annular wind shield 411 and the second annular wind shield 412, to further improve the blocking effect of the wind shield 41 on the hot air, a sealing block 413 is also installed in the gap of the winding coil 22 in this embodiment, so as to prevent the hot air from flowing back into the first gap 23 along the gap in the winding coil 22. The first fan 42 is installed in the avoidance hole of the second annular wind shield 412. Thus, the wind shield 41 structure composed of the first annular wind shield 411, the second annular wind shield 412 and the sealing block 413 is not only convenient to assemble, stable and reliable, but also can effectively intercept the hot air in the second channel 122. At the same time, the assembly structure between the first fan 42 arranged in the second annular wind shield 412 and the wind shield 41 is more compact, so that the first fan 42 can timely blow the hot air in the first gap 23 and the second ventilation duct 321 into the second channel 122, and discharge it into the first ventilation duct 12 through the second channel 122 for cooling. Moreover, under the action of the wind force of the first fan 42, an air flow barrier with a relatively large pressure will be formed on the side of the second gap 421 close to the second channel 122 between the second annular wind shield 412 and the first fan 42, so as to prevent the hot air from entering the first gap 23 and the second ventilation duct 321 along the second gap 421.
[0051] Among them, to further ensure that the hot air will not enter the first gap 23 and the second ventilation duct 321 along the second gap 421. After the first annular wind shield 411 is installed in this embodiment, it is necessary to ensure that the length of the second gap 421 in the radial direction of the rotating shaft 31 is greater than 0 mm and not greater than 5 mm. In this range, it can not only prevent the second annular wind shield 412 from interfering with the first fan 42, but also prevent the second gap 421 from being too large, so as to ensure that the wind force generated by the first fan 42 can form an air flow barrier with a relatively large pressure on the side of the second gap 421 close to the second channel 122, thereby effectively preventing the hot air from entering the first gap 23 and the second ventilation duct 321 along the second gap 421. The length of the second gap 421 in the radial direction of the rotating shaft 31 can specifically include one of 0.2 mm, 0.3 mm, 0.5 mm, 0.7 mm, 0.8 mm, 1 mm, 1.3 mm, 1.5 mm, 1.7 mm, 1.9 mm, 2 mm, 2.1 mm, 2.4 mm, 2.6 mm, 2.8 mm, 3 mm, 3.2 mm, 3.5 mm, 3.8 mm, 4 mm, 4.2 mm, 4.5 mm, 4.7 mm, 4.9 mm, 5 mm, etc.
[0052] In the prior art, in order to improve the balance accuracy inside the rotor component 30, a balance ring is sleeved on the outer peripheral surface of the rotating shaft 31, and balance blocks for weight are arranged in the balance ring to adjust the balance accuracy. However, the balance ring affects the ventilation of the second ventilation duct 321, making the ventilation of the second ventilation duct 321 poor. This is mainly because the balance ring blocks the cold air before it enters the second ventilation duct 321, resulting in the cold air not being able to enter the second ventilation duct 321 in time and effectively, reducing the amount of cold air entering the second ventilation duct 321. In this regard, while improving the balance accuracy of the rotor component 30, in order to improve the smoothness of the cold air in the first chamber 111 entering the second ventilation duct 321, a balance structure is arranged on the rotating shaft 31 in this embodiment, and the balance structure is located in the first chamber 111. Among them, along the first direction, the projected outer contour of the balance structure is misaligned with the projected outer contour of the second ventilation duct 321. Thus, the balance structure will not obstruct the cold air entering the second ventilation duct 321, improving the smoothness of the cold air entering the second ventilation duct 321, and further improving the cooling effect of the second ventilation duct 321 on the rotor component 30, effectively and timely taking away the heat generated by the rotor component 30.
[0053] In this embodiment, the balance structure includes a clamping groove 311 and balance blocks. The clamping groove 311 is circumferentially arranged around the rotating shaft 31 on the rotating shaft 31. The balance blocks include multiple pieces, and the multiple balance blocks are respectively clamped in the clamping groove 311. The number of balance blocks clamped in the clamping groove 311 can be specifically selected according to the balance requirements. Since the balance blocks are installed in the clamping groove 311 recessed in the rotating shaft 31, the balance structure formed by the balance blocks and the clamping groove 311 will not obstruct the cold air entering the second ventilation duct 321. And this balance structure is simple and convenient to process and has a high assembly efficiency.
[0054] The specific structure of the clamping groove 311 in this embodiment may include a dovetail groove. Due to its unique shape, the dovetail groove can provide more precise positioning and guiding functions for the rotor component 30. When the balance block is inserted into the dovetail groove, the interlocking structure formed by the balance block and the dovetail groove can ensure that the balance block is firmly fixed in multiple directions, reducing the positional deviation during the assembly process and improving the dynamic balance during the operation of the motor. Secondly, directly machining the dovetail groove for clamping the balance block on the rotating shaft 31 makes it more difficult for the balance block to move or fall off under the force state because its geometric shape increases the friction and embedding force, and it can maintain good connection stability even under vibration or high-speed rotation conditions. At the same time, the shape of the dovetail groove helps the balance block to have a certain self-locking effect in both the axial and radial directions, preventing the displacement of the balance block caused by the centrifugal force or vibration generated during the operation of the motor, which is crucial for ensuring the long-term stable operation of the motor. In addition, the dovetail groove structure is usually more robust and durable. Especially when using high-quality materials and precise processing techniques, it can withstand greater loads without damage, improving the overall reliability and service life of the motor.
[0055] In addition, while the motor in this embodiment is cooled by the external fan and the heat sink 18 in the external air path, to overcome the problem of insufficient heat dissipation caused by factors such as the thermal resistance between the heat sink 18 and the motor and the insufficient area of the heat sink 18, and to further effectively reduce the temperature of the motor, the motor provided in this embodiment further includes a cooling component. The cooling component is installed on the housing 10, and the cooling component is used to reduce the heat in the first ventilation duct 12. Thus, during the process of cooling the hot air from the electromagnetic interaction component through the first ventilation duct 12 in this embodiment, the use of the cooling component can be combined to timely take away the heat in the first ventilation duct 12, thereby improving the heat dissipation effect and efficiency of the first ventilation duct 12 on the motor.
[0056] The cooling component in this embodiment may include a condenser or a cooling device through which a cooling medium (such as cold water) is passed to timely remove the heat of the first ventilation duct 12. Specifically, the cooling component in this embodiment may include a duct 16 and a second fan 17. There are multiple ducts 16, and the multiple ducts 16 are installed in the first ventilation duct 12 and are spaced apart from each other, so that the air in the installation cavity 11 can enter between the multiple ducts 16 of the first ventilation duct 12 for cooling and heat dissipation. And the ports at the opposite ends of the duct 16 communicate with the outside of the housing 10. The duct 16 in this embodiment includes at least one of a circular pipe, a rectangular pipe, a diamond pipe, etc. The second fan 17 is installed on the housing 10 and can blow air into the duct 16. Thus, in this embodiment, only multiple ducts 16 need to be installed in the first ventilation duct 12, and the second fan 17 is used to blow air into the duct 16, so as to take away the heat in the first ventilation duct 12 through the duct 16, that is, to exchange heat with the internal heat of the motor through the duct 16, thereby taking away the internal heat of the motor, making the cooling effect of the first ventilation duct 12 on the motor more obvious and significantly reducing the temperature. Among them, in addition to blowing air into the duct 16, the second fan 17 can also blow air to the heat sink 18 provided outside the housing 10, so that the first fan 42 blows air into the duct 16 and the heat sink 18 at the same time, combining the heat dissipation of the internal air path (the air path where the first ventilation duct 12 is located) and the external air path where the heat sink 18 is located, improving the heat dissipation efficiency of the motor and significantly reducing the temperature of the motor. And it is convenient to assemble and energy-saving. Specifically, the duct 16 may be multiple circular steel pipes with a diameter of 20 mm. The multiple steel pipes are arranged in the first ventilation duct 12 along the circumferential direction of the rotating shaft 31 and are spaced apart from each other along the radial direction of the steel pipes. When at least four first ventilation ducts 12 are provided in the housing 10, the at least four first ventilation ducts 12 may be arranged around the installation cavity 11 along the circumferential direction of the rotating shaft 31. Eight steel pipes may be respectively installed in at least two of the first ventilation ducts 12, and the opposite ends of the steel pipes communicate with the outside of the housing 10 respectively, so that the second fan 17 can blow cold air into the steel pipes, thereby timely blowing away the heat in the first ventilation duct 12. Moreover, in view of the good heat conduction performance of the steel pipe, it can effectively promote the heat exchange between the cold air and the pipe wall of the steel pipe, thereby improving the cooling efficiency.
[0057] Specifically, in this embodiment, the second fan 17 may be installed in the installation groove 15 outside the installation cavity 11. The notch of the installation groove 15 communicates with the pipe orifice of the duct 16 extending outside the first ventilation duct 12 and the heat dissipation channel between the heat sink 18 provided outside the housing 10. Thus, after the second fan 17 is turned on, the air generated by the second fan 17 can be blown to the duct 16 and the heat sink 18, so as to simultaneously exchange the heat in the heat sink 18 and the first ventilation duct 12 with the external environment, efficiently realizing the heat dissipation operation of the motor, thereby significantly reducing the temperature of the motor.
[0058] Among them, there is a third gap 4111 between the side of the first annular wind shield 411 away from the winding coil 22 and the inner wall surface of the installation cavity 11 in this embodiment. Along the radial direction of the rotating shaft 31, the size of the third gap 4111 is not greater than 3 mm. Specifically, the size of the third gap 4111 may include one of 3 mm, 2.8 mm, 2.5 mm, 2.3 mm, 2 mm, 1.8 mm, 1.5 mm, 1.3 mm, 1.1 mm, 1 mm, 0.8 mm, 0.4 mm, 0 mm, etc. After the first annular wind shield 411 is installed, since the size of the third gap 4111 is not greater than 3 mm, the hot air before entering the first opening 13 is not easily refluxed to the first gap 23 along the third gap 4111, improving the blocking effect of the first annular wind shield 411 on the hot air. Of course, the size of the third gap 4111 in this embodiment is preferably zero.
[0059] Among them, when the size of the third gap 4111 is greater than zero but not greater than 3 mm, to further ensure that the hot air will not reflux to the electromagnetic interaction component along the third gap 4111, the air guiding component 40 in this embodiment further includes a sealing plug, and the size of the sealing plug is adapted to the third gap 4111 and is installed in the third gap 4111. Thus, in this embodiment, the third gap 4111 is blocked by the sealing plug, so as to ensure that the hot air will not reflux to the electromagnetic interaction component along the third gap 4111.
[0060] In addition, the first fan 42 in this embodiment includes one of a centrifugal fan and an axial fan. The first fan 42 in this embodiment is preferably an axial fan. This is mainly because the working principle of the axial fan is to make the air flow axially, that is, the air flow direction is the same as the direction of the fan shaft. That is to say, it can make the air in the first channel 121 flow axially along the fan shaft to the second channel 122. Axial fans usually have a larger fan diameter and a higher rotational speed, which enables them to generate a larger air volume, ensuring that the hot air in the first channel 121 can be efficiently guided to the second channel 122, and the hot air can enter the first ventilation duct 12 through the first opening 13 in a timely manner under the action of the wind force. Due to the design characteristics of the axial fan, when the fan stops working, the contact area between the blades and the air is relatively large, and the fan does not have a closed volute structure like a centrifugal fan, so the air can enter and exit more freely. Therefore, even under the action of the external wind force, the resistance of the air directly acting on the fan blades is relatively small, and it is not easy to cause a significant reverse air flow phenomenon.
[0061] As can be seen from the above, in this embodiment, 8 steel pipes can be respectively added to at least two first ventilation ducts 12 in the motor housing 10. A part of the cold air of the second fan 17 exchanges heat with the heat in the first ventilation duct 12 through the steel pipes, thereby taking away the heat inside the motor, making the cooling effect of the motor obvious and the temperature reduction effect significant. The motor in this embodiment may specifically include a three-phase asynchronous motor, a synchronous motor, etc. Secondly, an axial flow fan is installed inside the motor, and a wind shield 41 is added to the end of the winding coil 22. The cold air enters the electromagnetic interaction component from one end of the first gap 23 and the second ventilation duct 321, takes away the heat and then comes out from the other end, and leads to the axial flow fan to the first ventilation duct 12 for cooling, solving the problem that the hot air circulation heat inside the stator component 20 and the rotor component 30 is not easily taken away. In addition, in this embodiment, the balance ring inside the rotor is cancelled, and a clamping groove 311 (such as a dovetail groove) is directly opened on the rotating shaft 31. The balance block is directly installed in the clamping groove 311 on the rotating shaft 31, avoiding the influence of the balance structure on the ventilation smoothness of the second ventilation duct 321, and improving the heat dissipation efficiency and effect when the rotor component 30 dissipates heat through the second ventilation duct 321.
[0062] Therefore, through the changes in the internal and external air paths and the balance structure in this embodiment, the heat dissipation of the motor has been greatly improved, the temperature rise of the stator component 20 and the rotor component 30 inside the motor has been reduced, and the temperature, stator-rotor iron loss, copper loss, etc. inside the motor have been effectively reduced, thereby improving the electrical efficiency and service life of the motor.
[0063] For the sake of description, spatial relative terms such as "above", "over", "on the upper surface", "above-mentioned", etc. can be used here to describe the spatial position relationship between a device or feature shown in the figure and other devices or features. It should be understood that the spatial relative terms are intended to include different orientations in use or operation in addition to the orientation described in the figure for the device. For example, if the device in the figure is inverted, the device described as "above other devices or structures" or "over other devices or structures" will be positioned as "below other devices or structures" or "under other devices or structures" afterwards. Thus, the exemplary term "above" can include both the orientations of "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and corresponding interpretations should be made for the spatial relative descriptions used here.
[0064] In addition, it should be noted that the use of words such as "first" and "second" to limit the components is only for the convenience of distinguishing the corresponding components. Without additional statements, the above words have no special meanings, so they cannot be understood as limiting the protection scope of this application.
[0065] The above are only the preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, various changes and modifications can be made to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included within the protection scope of the present application.
Claims
1. A high-voltage, high-efficiency and compact three-phase asynchronous motor, characterized in that, Comprising: A housing (10), an installation cavity (11) and a first ventilation duct (12) are arranged inside the housing (10), and the first ventilation duct (12) is located outside the installation cavity (11); An electromagnetic interaction component, the electromagnetic interaction component is installed in the installation cavity (11) and divides the installation cavity (11) into a first chamber (111) and a second chamber (112), the first chamber (111) is located on one side of the electromagnetic interaction component along a first direction and is communicated with the first ventilation duct (12), the second chamber (112) is located on the other side of the electromagnetic interaction component along the first direction, the electromagnetic interaction component includes a stator component (20) and a rotor component (30), the rotor component (30) is rotatably connected to the housing (10) and is in clearance fit with the stator component (20), and there is a first gap (23) between the rotor component (30) and the stator component (20), a second ventilation duct (321) is arranged inside the rotor component (30), and the first gap (23) and the second ventilation duct (321) are respectively communicated with the first chamber (111) and the second chamber (112); A wind guiding component (40), the wind guiding component (40) is installed in the second chamber (112) and divides the second chamber (112) into a first channel (121) and a second channel (122), the first channel (121) is communicated with the first gap (23), the second ventilation duct (321) and the second channel (122), the second channel (122) is communicated with the first ventilation duct (12), and the wind guiding component (40) is used for guiding the air in the first channel (121) to the second channel (122).
2. The high-voltage, high-efficiency, compact three-phase asynchronous motor according to claim 1, characterized in that A first opening (13) is arranged on the side wall between the first ventilation duct (12) and the second chamber (112), the first gap (23) is closer to the first opening (13) than the second ventilation duct (321), and the wind guiding component (40) includes: A wind blocking piece (41), the wind blocking piece (41) is installed between the first gap (23) and the first opening (13); A first fan (42), the first fan (42) is installed on the rotor component (30) and is located on the side of the wind blocking piece (41) close to the first gap (23), the first fan (42) and the wind blocking piece (41) divide the second chamber (112) into the first channel (121) and the second channel (122), and the second channel (122) is communicated with the first opening (13).
3. The high-voltage, high-efficiency, compact three-phase asynchronous motor according to claim 2, characterized in that, The stator component (20) includes a stator core (21) and a winding coil (22), the winding coil (22) is installed on the stator core (21) and protrudes from opposite ends of the stator core (21) along the first direction, and an installation hole is arranged inside the stator core (21); The rotor component (30) includes a rotating shaft (31) and a rotor core (32). The rotor core (32) is mounted on the rotating shaft (31) and is located within the mounting hole. The second ventilation duct (321) is provided within the rotor core (32). The first gap (23) is located between the rotor core (32) and the stator core (21) and on the side of the winding coil (22) away from the first opening (13). Opposite ends of the rotating shaft (31) extend out of the stator component (20) and are respectively rotatably connected to the housing (10). The windshield member (41) is mounted at the end of the winding coil (22) away from the stator core (21) and on the side of the first opening (13) close to the stator core (21). The first fan (42) is mounted on the rotating shaft (31) and is offset from the windshield member (41).
4. The high-voltage, high-efficiency, compact three-phase asynchronous motor according to claim 3, characterized in that, The windshield member (41) includes: A first annular windshields (411), which is sleeved on the outer side of the winding coil (22) facing away from the rotating shaft (31) and is located on the side of the first opening (13) close to the stator core (21); A second annular windshields (412), which is provided with an avoidance hole for the rotating shaft (31) to pass through. The second annular windshields (412) is sleeved on the inner side of the winding coil (22) close to the rotating shaft (31). The first fan (42) is located within the avoidance hole and has a second gap with the inner wall surface of the avoidance hole; A sealing block (413), which is mounted between the first annular windshields (411) and the second annular windshields (412) and is located within the gap of the winding coil (22).
5. The high-voltage, high-efficiency, compact three-phase asynchronous motor according to claim 3, wherein A balancing structure is provided on the rotating shaft (31). The balancing structure is located within the first chamber (111). Along the first direction, the projected outer contour of the balancing structure is offset from the projected outer contour of the second ventilation duct (321).
6. The high-voltage, high-efficiency, compact three-phase asynchronous motor according to claim 5, characterized in that, The balancing structure includes: A clamping groove (311), which is circumferentially provided around the rotating shaft (31) along the circumferential direction of the rotating shaft (31); Balancing blocks, which include multiple pieces. Multiple balancing blocks are respectively clamped within the clamping groove (311).
7. The high-voltage, high-efficiency, compact three-phase asynchronous motor according to any one of claims 1 to 6, characterized in that, It further includes: A cooling component, which is mounted on the housing (10). The cooling component is used to reduce the heat of the first ventilation duct (12).
8. The high-voltage, high-efficiency, compact three-phase asynchronous motor according to claim 7, characterized in that, The cooling component includes: Air guide pipes (16), which include multiple pieces. Multiple air guide pipes (16) are mounted within the first ventilation duct (12) and are spaced apart from each other. And the ports at opposite ends of the air guide pipes (16) are communicated with the outside of the housing (10); A second fan (17), which is mounted on the housing (10) and can blow air into the air guide pipes (16).
9. The high-voltage, high-efficiency and compact three-phase asynchronous motor according to claim 4, characterized in that, There is a third gap (4111) between the side of the first annular wind shield (411) away from the winding coil (22) and the inner wall surface of the installation cavity (11). Along the radial direction of the rotating shaft (31), the size of the third gap (4111) is not greater than 3 mm; and / or, the air guiding assembly (40) further includes: A sealing plug, the size of the sealing plug is adapted to the third gap (4111) and is installed in the third gap (4111).
10. The high-voltage, high-efficiency, compact three-phase asynchronous motor according to any one of claims 2 to 6, characterized in that, The first fan (42) includes one of a centrifugal fan and an axial flow fan.