Electric motor and blower

Abstract

The utility model provides a kind of motor and air blower, motor includes shell structure, stator core, winding, rotor, rotating shaft, front radial bearing, axial bearing, rear radial bearing;Motor further includes total passage, middle branch passage, front branch passage, rear branch passage and bearing branch passage, middle branch passage is sent to the gap between stator core and rotor with cooling air, front branch passage is sent to the part of winding with cooling air located stator core front end, rear branch passage is sent to the part of winding with cooling air located stator core rear end and rear radial bearing, bearing branch passage is sent to front radial bearing and axial bearing with cooling air.In the present scheme, cooling air can be respectively concentrated cooling to stator core, rotor, winding, front radial bearing, rear radial bearing and axial bearing by each passage, and the design of multiple cooling channels fully covers the heating area in motor, improves the heat dissipation efficiency of motor, prolongs the service life of motor.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, and more specifically, to a motor and a blower. Background Technology

[0002] Electric motors, as important mechanical devices, are widely used in industrial production, air conditioning systems, ventilation equipment, and other fields. With the continuous increase in motor speed and power density, internal heat generation has become increasingly prominent, and the heat dissipation of key components has become a crucial factor affecting motor performance and reliability.

[0003] In existing motor designs, internal heat dissipation typically employs overall air cooling or simple heat dissipation structures. However, these designs often fail to effectively guide cooling gas to the components experiencing the most heat generation, leading to excessively high local temperatures and impacting motor performance and lifespan. Furthermore, traditional heat dissipation designs usually utilize a single cooling path, meaning that cooling gas often fails to adequately cover all heat-generating areas as it flows through the motor, resulting in low heat dissipation efficiency. This not only reduces the overall efficiency of the motor but also limits its power density, making it difficult to meet the demands of modern industry. Utility Model Content

[0004] This invention provides an electric motor and a blower to solve the problem in the prior art where the electric motor has a single cooling path, resulting in the inability to centrally cool the main heat-generating components inside and low heat dissipation efficiency.

[0005] To address the aforementioned problems, according to one aspect of this utility model, a motor is provided, comprising a housing structure, a stator core, windings, a rotor, a shaft, a front radial bearing, an axial bearing, and a rear radial bearing. The stator core is fixed within the cavity of the housing structure, the windings are wound around the stator core, and the rotor is rotatably disposed within the cavity of the stator core. The shaft passes through the rotor. The front radial bearing and the axial bearing are both installed between the front part of the shaft and the housing structure, and the rear radial bearing is installed between the rear part of the shaft and the housing structure. The motor also includes a main channel, a middle branch channel, a front branch channel, a rear branch channel, and a bearing branch channel. External cooling air is delivered to the middle branch channel, the front branch channel, the rear branch channel, and the bearing branch channel through the main channel. The middle branch channel delivers cooling air to the gap between the stator core and the rotor; the front branch channel delivers cooling air to the portion of the winding located at the front end of the stator core; the rear branch channel delivers cooling air to the portion of the winding located at the rear end of the stator core and the rear radial bearing; and the bearing branch channel delivers cooling air to the front radial bearing and the axial bearing.

[0006] Furthermore, the motor also includes a first air outlet channel and a second air outlet channel located at the front of the housing structure, and a third air outlet channel located at the rear of the housing structure. The first air outlet channel, the second air outlet channel, and the third air outlet channel are all connected to the outside of the motor. The two ends of the gap between the stator core and the rotor are respectively connected to the first air outlet channel and the third air outlet channel. The front branch channel is connected to the first air outlet channel, the bearing branch channel is connected to the second air outlet channel, and the rear branch channel is connected to the third air outlet channel.

[0007] Furthermore, the main channel, middle branch channel, front branch channel, rear branch channel and bearing branch channel are all distributed circumferentially along the outer shell structure; the first air outlet channel, second air outlet channel and third air outlet channel all extend axially along the outer shell structure, and the first air outlet channel, second air outlet channel and third air outlet channel are all distributed circumferentially along the outer shell structure.

[0008] Furthermore, the outer shell structure includes a cylindrical body, with the stator core and windings located inside the cylindrical body; the main channel includes at least one first channel, which is located on the inner wall of the cylindrical body and extends along the axial direction of the cylindrical body. The first channel is provided with a middle air inlet, a front air inlet and a rear air inlet at intervals. The middle air inlet is connected to the middle branch channel, the front air inlet is connected to the front branch channel, and the rear air inlet is connected to the rear branch channel.

[0009] Furthermore, there are multiple first channels, which are distributed circumferentially along the cylinder. Each first channel has multiple rear air inlets spaced apart along the axial direction. The stator core includes two stator structures spaced apart, with a middle branch channel formed between the two stator structures. The space between the front of the cylinder and the stator core forms a front branch channel, and the space between the rear of the cylinder and the stator core forms a rear branch channel.

[0010] Furthermore, the outer shell structure also includes a flange and a front housing. The front end of the cylinder is connected to the flange, the front housing is installed on the flange, the front radial bearing is installed inside the front housing, and the axial bearing is installed at the front of the cylinder and mates with the front radial bearing. The bearing branch channel includes a second channel and a cooling channel. The second channel is located inside the flange, one end of the second channel is connected to the first channel, and the other end of the second channel is connected to the gap inside the front radial bearing. The cooling channel is located between the front radial bearing and the axial bearing, and the cooling channel connects the gap inside the front radial bearing and the gap inside the axial bearing.

[0011] Furthermore, the axial bearing has a third channel arranged radially, and the gap between the axial bearing, the cylinder and the front housing forms a fourth channel. The gap inside the axial bearing is connected through the third channel and the fourth channel, and the fourth channel is connected to the outside of the motor.

[0012] Furthermore, there are multiple first channels and multiple second channels, which are distributed circumferentially along the outer shell structure. The number of second channels is less than or equal to the number of first channels, and each second channel is connected to a corresponding first channel. There are multiple third channels, which are distributed circumferentially along the axial bearing. The fourth channel is an annular channel.

[0013] Furthermore, the cylinder has a third sub-channel, the flange has a fourth sub-channel, the two ends of the third sub-channel are connected to the fourth channel and the fourth sub-channel respectively, the fourth sub-channel is connected to the outside of the motor, and the third sub-channel and the fourth sub-channel form a second air outlet channel.

[0014] Furthermore, the outer shell structure includes a cylinder and a flange. The front end of the cylinder is connected to the flange, and the stator core and winding are located inside the cylinder. The flange has an axially arranged first sub-channel, and the cylinder has an axially arranged second sub-channel. The two ends of the second sub-channel are respectively connected to the front branch channel and the first sub-channel. The first sub-channel is connected to the outside of the motor. The first sub-channel and the second sub-channel form the first air outlet channel.

[0015] Furthermore, the outer shell structure includes a cylindrical body, a rear housing, and a rear end cover. The stator core and windings are located inside the cylindrical body. The rear end of the cylindrical body is connected to the rear housing. The rear radial bearing and the rear end cover are both installed in the rear housing. The motor has a fifth sub-channel and a sixth sub-channel. The fifth sub-channel passes through the rear housing and the rear end cover. The two ends of the fifth sub-channel are respectively connected to the rear branch channel and the outside of the motor. The sixth sub-channel passes through the rear radial bearing and the rear end cover. The two ends of the sixth sub-channel are respectively connected to the rear branch channel and the outside of the motor. The fifth sub-channel and the sixth sub-channel form a third air outlet channel.

[0016] Furthermore, the motor also includes a fan shroud, which is disposed in the outer casing structure. The channel inside the fan shroud is connected to the main channel, and the fan shroud is used to input the air from outside the motor into the main channel.

[0017] Furthermore, the shroud has a ring structure, which surrounds the outer shell structure. The main channel is distributed circumferentially along the outer shell structure, and the outer shell structure has multiple main air inlets distributed circumferentially, which connect the channels inside the shroud with the main channel.

[0018] According to another aspect of the present invention, the present invention also provides a blower, which includes a volute, a diffuser, an impeller and the aforementioned motor. The outer shell structure is connected to both the volute and the diffuser. The diffuser separates the cavity inside the volute and the cavity inside the outer shell structure. The impeller is installed at the end of the rotating shaft and is located inside the cavity of the volute.

[0019] In this design, the motor includes a main cooling channel, a middle branch channel, a front branch channel, a rear branch channel, and a bearing branch channel. This allows cooling air to be channeled through each channel to provide centralized cooling for the stator core, rotor, windings, front radial bearing, rear radial bearing, and axial bearing. The stator core, rotor, windings, front radial bearing, and axial bearing are all components that generate significant heat during motor operation. Centralized cooling of these components greatly improves the motor's heat dissipation efficiency, helps improve its operating performance, and extends its service life. Furthermore, the multiple cooling channels effectively cover the heat-generating areas within the motor, improving heat dissipation performance and thus enhancing the overall efficiency of the motor. Attached Figure Description

[0020] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0021] Figure 1 A cross-sectional view of the blower provided in an embodiment of the present invention is shown;

[0022] Figure 2 It shows Figure 1 A cross-sectional view of the blower from another angle;

[0023] Figure 3 It shows Figure 1 A partial sectional view of the blower at the junction of the third and fourth channels;

[0024] Figure 4 It shows Figure 1 A partial sectional view of the central blower at the junction of the first and second channels;

[0025] Figure 5 It shows Figure 1 A sectional view of the outer casing structure of the medium blower;

[0026] Figure 6 It shows Figure 1 A schematic diagram of the flow trajectory of cooling air in a blower;

[0027] Figure 7 It shows Figure 1 A schematic diagram of the structure of a medium-sized blower.

[0028] The above figures include the following reference numerals:

[0029] 10. Outer shell structure; 11. Cylinder; 111. Third sub-channel; 112. Second sub-channel; 12. Flange; 121. Fourth sub-channel; 122. First sub-channel; 13. Front shell; 14. Rear shell; 15. Rear end cover; 16. Main air inlet;

[0030] 21. Stator core; 211. Stator structure; 22. Winding; 23. Rotor; 24. Shaft; 25. Front radial bearing; 26. Axial bearing; 261. Third channel; 262. Fourth channel; 27. Rear radial bearing;

[0031] 31. Main channel; 311. First channel; 3111. Middle air inlet; 3112. Front air inlet; 3113. Rear air inlet; 32. Middle branch channel; 33. Front branch channel; 34. Rear branch channel; 35. Bearing branch channel; 351. Second channel;

[0032] 41. First air outlet duct; 42. Second air outlet duct; 43. Third air outlet duct; 431. Fifth sub-duct; 432. Sixth sub-duct;

[0033] 50. Wind shield;

[0034] 61. Volute; 62. Diffuser; 63. Impeller. Detailed Implementation

[0035] The technical solutions in at least one embodiment will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. The following description of at least one embodiment is merely illustrative and is not intended to limit this application or its applications. Other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are all within the scope of protection of this application.

[0036] like Figures 1 to 7As shown, an embodiment of this utility model provides an electric motor, including a housing structure 10, a stator core 21, windings 22, a rotor 23, a shaft 24, a front radial bearing 25, an axial bearing 26, and a rear radial bearing 27. The stator core 21 is fixed within the cavity of the housing structure 10, the windings 22 are wound around the stator core 21, the rotor 23 is rotatably disposed within the cavity of the stator core 21, and the shaft 24 passes through the rotor 23. The front radial bearing 25 and the axial bearing 26 are both installed between the front part of the shaft 24 and the housing structure 10, and the rear radial bearing 27 is installed between the rear part of the shaft 24 and the housing structure 10. The motor also includes a main channel 31 and a middle branch. Channel 32, front branch channel 33, rear branch channel 34 and bearing branch channel 35. External cooling air is delivered to the middle branch channel 32, front branch channel 33, rear branch channel 34 and bearing branch channel 35 through the main channel 31. Among them, the middle branch channel 32 delivers cooling air to the gap between the stator core 21 and the rotor 23, the front branch channel 33 delivers cooling air to the part of the winding 22 located at the front end of the stator core 21, the rear branch channel 34 delivers cooling air to the part of the winding 22 located at the rear end of the stator core 21 and the rear radial bearing 27, and the bearing branch channel 35 delivers cooling air to the front radial bearing 25 and the axial bearing 26.

[0037] In this design, the motor includes a main channel 31, a middle branch channel 32, a front branch channel 33, a rear branch channel 34, and a bearing branch channel 35. This allows cooling air to be channeled through each channel to centrally cool the stator core 21, rotor 23, windings 22, front radial bearing 25, rear radial bearing 27, and axial bearing 26. These components generate significant heat during motor operation; centralized cooling greatly improves heat dissipation efficiency, enhances operating performance, and extends service life. Furthermore, the multiple cooling channels effectively cover the heat-generating areas, improving overall efficiency. This motor can be used in equipment such as blowers.

[0038] like Figure 1 , Figure 2 and Figure 4 As shown, the motor also includes a first air outlet channel 41 and a second air outlet channel 42 located at the front of the housing structure 10, and a third air outlet channel 43 located at the rear of the housing structure 10. The first air outlet channel 41, the second air outlet channel 42, and the third air outlet channel 43 are all connected to the outside of the motor. The two ends of the gap between the stator core 21 and the rotor 23 are respectively connected to the first air outlet channel 41 and the third air outlet channel 43. The front branch channel 33 is connected to the first air outlet channel 41, the bearing branch channel 35 is connected to the second air outlet channel 42, and the rear branch channel 34 is connected to the third air outlet channel 43.

[0039] The two ends of the gap between the stator core 21 and the rotor 23 are respectively connected to the first air outlet channel 41 and the third air outlet channel 43. After flowing through the stator core 21, rotor 23 and winding 22, the cooling air flows out of the outer casing structure 10 through the first air outlet channel 41 and the third air outlet channel 43, and is finally discharged to the outside of the motor. When the cooling air is discharged to the outside of the motor through the third air outlet channel 43, it flows through the rear radial bearing 27, which is cooled. The bearing branch channel 35 is connected to the second air outlet channel 42. The fluid after cooling the radial bearing 25 and the axial bearing 26 is discharged from the motor through the second air outlet channel 42. Each air outlet channel discharges the cooled fluid from the inside of the motor in a timely manner, realizing continuous heat dissipation of the cooling air inside the motor and ensuring the heat dissipation efficiency of the motor.

[0040] In some embodiments, the main channel 31, the middle branch channel 32, the front branch channel 33, the rear branch channel 34, and the bearing branch channel 35 are all distributed circumferentially along the outer shell structure 10; the first air outlet channel 41, the second air outlet channel 42, and the third air outlet channel 43 all extend axially along the outer shell structure 10, and the first air outlet channel 41, the second air outlet channel 42, and the third air outlet channel 43 are all distributed circumferentially along the outer shell structure 10.

[0041] This circumferentially distributed channel design ensures that the cooling air fully covers the entire circumference of the motor, enabling it to reach the heat-generating parts of the motor more quickly, accelerating heat exchange, improving the uniformity and efficiency of cooling, significantly reducing the overall temperature of the motor, reducing the failure rate caused by local overheating, and improving the durability and efficiency of the motor.

[0042] like Figure 1 , Figure 5 As shown, the outer shell structure 10 includes a cylindrical body 11, a stator core 21 and a winding 22 located inside the cylindrical body 11; the main channel 31 includes at least one first channel 311, the first channel 311 is located on the inner wall of the cylindrical body 11 and extends along the axial direction of the cylindrical body 11, and the first channel 311 is provided with a middle air inlet 3111, a front air inlet 3112 and a rear air inlet 3113 at intervals, the middle air inlet 3111 is connected to the middle branch channel 32, the front air inlet 3112 is connected to the front branch channel 33, and the rear air inlet 3113 is connected to the rear branch channel 34.

[0043] The main channel 31 includes at least one first channel 311, which is located on the inner wall of the cylinder 11 and extends along the axial direction of the cylinder 11, facilitating the distribution of cooling air throughout the cylinder 11. By setting a middle air inlet 3111, a front air inlet 3112, and a rear air inlet 3113, and connecting them to the middle branch channel 32, the front branch channel 33, and the rear branch channel 34 respectively, the cooling path is optimized, the heat-generating area in the motor is fully covered, the heat dissipation performance is improved, and the overall efficiency of the motor is enhanced.

[0044] In some embodiments, there are multiple first channels 311, which are distributed circumferentially along the cylinder 11. Each first channel 311 has multiple rear air inlets 3113 spaced apart along the axial direction. The stator core 21 includes two stator structures 211 spaced apart, with a middle branch channel 32 formed between the two stator structures 211. The space between the front part of the cylinder 11 and the stator core 21 forms a front branch channel 33, and the space between the rear part of the cylinder 11 and the stator core 21 forms a rear branch channel 34.

[0045] The portion of winding 22 located at the rear end of stator core 21 is the lead-out end, which is typically larger and generates significant heat. Multiple rear air inlets 3113 are spaced apart along the first channel 311 to effectively reduce the temperature of the lead-out end of winding 22, preventing excessively high temperatures in certain areas. Due to the high motor speed, rotor 23 experiences significant wind friction and eddy current losses, resulting in substantial heat generation. By designing the stator structure 211 into two spaced-apart sections, forming a middle branch channel 32 between the two sections, cooling air directly cools the stator core 21 and rotor 23, significantly improving the motor's heat dissipation performance and contributing to increased overall efficiency. The front branch channel 33 and rear branch channel 34 ensure that the cooling path fully covers the main heat-generating areas of the motor, greatly improving heat dissipation efficiency, enhancing operating performance, and extending the motor's service life.

[0046] like Figure 1 , Figure 4 As shown, the outer shell structure 10 also includes a flange 12 and a front housing 13. The front end of the cylinder 11 is connected to the flange 12, the front housing 13 is installed on the flange 12, the front radial bearing 25 is installed inside the front housing 13, and the axial bearing 26 is installed at the front of the cylinder 11 and cooperates with the front radial bearing 25. The bearing branch channel 35 includes a second channel 351 and a cooling channel. The second channel 351 is located inside the flange 12. One end of the second channel 351 is connected to the first channel 311, and the other end of the second channel 351 is connected to the gap inside the front radial bearing 25. The cooling channel is located between the front radial bearing 25 and the axial bearing 26, and the cooling channel connects the gap inside the front radial bearing 25 and the gap inside the axial bearing 26.

[0047] By setting a second channel 351 in the flange 12, a cooling channel is set between the front radial bearing 25 and the axial bearing 26, connecting the first channel 311 and the gap in the front radial bearing 25, the gap in the front radial bearing 25 and the gap in the axial bearing 26, so that the cooling air can effectively cool the front radial bearing 25 and the axial bearing 26, ensuring that the temperature in the bearing area is effectively controlled, reducing failures caused by bearing overheating, and extending the service life of the motor.

[0048] like Figure 3 As shown, the axial bearing 26 has a third channel 261 arranged radially. The gap between the axial bearing 26, the cylinder 11, and the front housing 13 forms a fourth channel 262. The gap inside the axial bearing 26 is connected through the third channel 261 and the fourth channel 262, and the fourth channel 262 is connected to the outside of the motor. By setting the third channel 261 and the fourth channel 262 at the axial bearing 26, the flow path of the cooling air is increased. After flowing through the third channel 261, the cooling air can directly and centrally cool the axial bearing 26, and then be discharged in time through the fourth channel 262. This reduces the retention of cooled fluid around the axial bearing 26, effectively lowers the temperature of the axial bearing 26, reduces the risk of accidents caused by overheating, and improves the operating stability and efficiency of the motor.

[0049] like Figure 3 , Figure 4 As shown, there are multiple first channels 311 and multiple second channels 351, all distributed circumferentially along the outer casing structure 10. The number of second channels 351 is less than or equal to the number of first channels 311, and each second channel 351 is connected to a corresponding first channel 311. There are multiple third channels 261, distributed circumferentially along the axial bearing 26. The fourth channel 262 is an annular channel. The multi-channel design and the circumferential distribution of the multiple channels ensure uniform distribution of cooling air, effectively reducing the temperature of the main heat-generating parts in the motor, improving cooling efficiency and uniformity, reducing failures caused by overheating, improving motor reliability, and extending its service life.

[0050] like Figure 1 , Figure 5 and Figure 6 As shown, the cylinder 11 has a third sub-channel 111, and the flange 12 has a fourth sub-channel 121. The two ends of the third sub-channel 111 are connected to the fourth channel 262 and the fourth sub-channel 121, respectively. The fourth sub-channel 121 is connected to the outside of the motor. The third sub-channel 111 and the fourth sub-channel 121 form the second air outlet channel 42. By providing the third sub-channel 111 and the fourth sub-channel 121 in the cylinder 11 and the flange 12, respectively, the cooling air, after flowing through the fourth channel 262, is discharged through the third sub-channel 111 and the fourth sub-channel 121. This reduces the retention of cooled fluid inside the motor, achieving efficient discharge of the cooling air fluid, avoiding heat accumulation inside the motor, and improving cooling efficiency.

[0051] like Figure 2 , Figure 6As shown, the outer casing structure 10 includes a cylindrical body 11 and a flange 12. The front end of the cylindrical body 11 is connected to the flange 12, and the stator core 21 and winding 22 are located inside the cylindrical body 11. The flange 12 has an axially arranged first sub-channel 122, and the cylindrical body 11 has an axially arranged second sub-channel 112. The two ends of the second sub-channel 112 are respectively connected to the front branch channel 33 and the first sub-channel 122. The first sub-channel 122 is connected to the outside of the motor. The first sub-channel 122 and the second sub-channel 112 form a first air outlet channel 41. The second sub-channel 112 and the first sub-channel 122 are respectively arranged in the cylindrical body 11 and the flange 12. After the cooling air flows through the front branch channel 33, it is discharged through the second sub-channel 112 and the first sub-channel 122, which reduces the retention of the cooled fluid inside the motor, realizes the efficient discharge of cooling air, avoids the accumulation of heat inside the motor, and improves the cooling efficiency.

[0052] like Figure 2 , Figure 6 As shown, the outer shell structure 10 includes a cylindrical body 11, a rear housing 14, and a rear end cover 15. The stator core 21 and winding 22 are located inside the cylindrical body 11. The rear end of the cylindrical body 11 is connected to the rear housing 14. The rear radial bearing 27 and the rear end cover 15 are both installed on the rear housing 14. The motor has a fifth sub-channel 431 and a sixth sub-channel 432. The fifth sub-channel 431 passes through the rear housing 14 and the rear end cover 15. The two ends of the fifth sub-channel 431 are respectively connected to the rear branch channel 34 and the outside of the motor. The sixth sub-channel 432 passes through the rear radial bearing 27 and the rear end cover 15. The two ends of the sixth sub-channel 432 are respectively connected to the rear branch channel 34 and the outside of the motor. The fifth sub-channel 431 and the sixth sub-channel 432 form a third air outlet channel 43. The fifth sub-channel 431 passes through the rear housing 14 and the rear end cover 15, and the sixth sub-channel 432 passes through the rear radial bearing 27 and the rear end cover 15. After flowing through the rear branch channel 34, the cooling air is discharged through the fifth sub-channel 431 and the sixth sub-channel 432, which reduces the retention of the cooled fluid inside the motor, realizes the efficient discharge of the cooling air, avoids the accumulation of heat inside the motor, and improves the cooling efficiency.

[0053] like Figure 1 As shown, the motor also includes a fan shroud 50, which is disposed within the housing structure 10. The channel within the fan shroud 50 is connected to the main channel 31. The fan shroud 50 is used to input external air into the main channel 31. The channel within the fan shroud 50 is connected to the main channel 31, which can introduce external cooling air into the motor and filter impurities in the cooling air, preventing impurities from clogging the internal channels of the motor, affecting heat dissipation efficiency, and damaging motor components. This improves the input efficiency of cooling air and enhances the operating efficiency and reliability of the motor.

[0054] In some embodiments, the fan shroud 50 is an annular structure, surrounding the outer shell structure 10. The main channel 31 is distributed circumferentially around the outer shell structure 10, and the outer shell structure 10 has multiple main air inlets 16 distributed circumferentially, connecting the channels within the fan shroud 50 to the main channel 31. By setting the fan shroud to an annular structure and distributing multiple main air inlets 16 circumferentially around the outer shell structure 10, external cooling air is facilitated to be uniformly input into the motor, improving the input efficiency and uniformity of the cooling air. This ensures that the motor receives uniformly distributed cooling air, reducing the overall temperature of the motor and improving its operating efficiency and reliability.

[0055] Optionally, the central air inlet 3111 is located in the middle of the central branch channel 32, connecting the first channel 311 and the central branch channel 32. The central lines of the main air inlet 16, the central air inlet 3111, and the central branch channel 32 are aligned. This alignment ensures that the cooling airflow path is straight, reducing the flow resistance of the fluid in the channel and allowing the fluid to flow into the central branch channel 32 faster and more stably, thereby improving the overall cooling efficiency. At the same time, the cooling air can directly enter the gap between the rotor 23 and the stator core 21, further improving the cooling efficiency.

[0056] like Figure 6 , Figure 7 As shown, an embodiment of this utility model also provides a blower, which includes a volute 61, a diffuser 62, an impeller 63, and the aforementioned motor. The outer casing structure 10 is connected to the volute 61 and the diffuser 62. The diffuser 62 separates the cavity within the volute 61 from the cavity within the outer casing structure 10. The impeller 63 is mounted on the end of the rotating shaft 24 and is located within the cavity of the volute 61. By incorporating this motor into the blower, effective heat management can be ensured during operation, improving its heat dissipation performance, preventing damage caused by excessively high local temperatures, and enhancing the blower's operating efficiency and reliability.

[0057] like Figure 6 As shown, the cooling air flow channel distribution in the blower of this utility model is as follows:

[0058] Cooling air enters the first channel 311 from the main air inlet 16 and is divided into 4 branches in the first channel 311;

[0059] In the first channel 311, one part of the cooling air enters the middle branch channel 32 through the middle air inlet 3111 and flows to the gap between the rotor 23 and the stator core 21. The cooling air flows out along the surface of the rotor 23 axially to both ends. One end flows through the surface of the winding 22 located at the front end of the stator core 21 and then flows to the outside of the blower through the first sub-channel 122 and the second sub-channel 112. The other end flows through the surface of the winding 22 located at the rear end of the stator core 21 and then flows to the outside of the blower through the fifth sub-channel 431 and the sixth sub-channel 432.

[0060] In the first channel 311, one part of the cooling air flows through the inlet 3112 to the surface of the winding 22 located at the front end of the stator core 21, and then flows through the first sub-channel 122 and the second sub-channel 112 to the outside of the blower.

[0061] In the first channel 311, one part of the cooling air flows through the rear air inlet 3113 to the surface of the winding 22 located at the rear end of the stator core 21, and then flows to the outside of the blower through the fifth sub-channel 431 and the sixth sub-channel 432.

[0062] like Figure 3 , 4 As shown, in the first channel 311, a portion of the cooling air flows through the second channel 351 into the cooling channel between the radial bearing 25 and the axial bearing 26, and then through the third channel 261 inside the axial bearing 26 to the fourth channel 262. In the fourth channel 262, the cooling air flows through the second air outlet channel 42 to the outside of the blower.

[0063] The motor and blower provided by this utility model have the following beneficial effects:

[0064] 1. The motor and blower provided by this utility model have a high-efficiency cooling channel. By optimizing the flow path of the cooling air, the motor and blower directly cool the parts with serious heat generation inside, such as rotor 23, winding 22 end, bearing, etc., thereby effectively reducing the internal temperature of the motor and blower and improving their heat dissipation performance.

[0065] 2. By connecting to different areas inside the motor through multiple air inlets, precise cooling of components such as rotor 23, winding 22 ends, front radial bearing 25, axial bearing 26 and rear radial bearing 27 can be achieved, ensuring that each heat-generating component can be fully cooled.

[0066] 3. Through reasonable flow channel design, the cooling air flows through a longer path inside the motor, which prolongs the cooling time and improves heat dissipation efficiency. At the same time, it can prevent the cooling gas from staying inside the motor for a long time after the cooling process is completed, which would affect the cooling effect.

[0067] The above descriptions are merely some embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

[0068] The technical features of the embodiments described above can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as the combination of these technical features does not contradict each other, it should be considered to be within the scope of this specification.

[0069] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0070] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this application. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as exemplary only and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0071] In the description of this application, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this application and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this application; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0072] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0073] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this application.

Claims

1. An electric machine characterized in that, The motor includes a housing structure (10), a stator core (21), windings (22), a rotor (23), a shaft (24), a front radial bearing (25), an axial bearing (26), and a rear radial bearing (27). The stator core (21) is fixed within the cavity of the housing structure (10), the windings (22) are wound around the stator core (21), the rotor (23) is rotatably disposed within the cavity of the stator core (21), and the shaft (24) passes through the rotor (23). The front radial bearing (25) and the axial bearing (26) are both installed between the front of the shaft (24) and the housing structure (10), and the rear radial bearing (27) is installed between the rear of the shaft (24) and the housing structure (10). The motor also includes a main channel (31), a middle branch channel (32), and a front branch channel. The main channel (31) provides cooling air to the middle branch channel (32), the front branch channel (33), the rear branch channel (34), and the bearing branch channel (35). The middle branch channel (32) delivers cooling air to the gap between the stator core (21) and the rotor (23). The front branch channel (33) delivers cooling air to the part of the winding (22) located at the front end of the stator core (21). The rear branch channel (34) delivers cooling air to the part of the winding (22) located at the rear end of the stator core (21) and the rear radial bearing (27). The bearing branch channel (35) delivers cooling air to the front radial bearing (25) and the axial bearing (26).

2. The electric machine of claim 1, wherein, The motor also includes a first air outlet channel (41) and a second air outlet channel (42) located at the front of the outer casing structure (10), and a third air outlet channel (43) located at the rear of the outer casing structure (10). The first air outlet channel (41), the second air outlet channel (42), and the third air outlet channel (43) are all connected to the outside of the motor. The two ends of the gap between the stator core (21) and the rotor (23) are respectively connected to the first air outlet channel (41) and the third air outlet channel (43). The front branch channel (33) is connected to the first air outlet channel (41), the bearing branch channel (35) is connected to the second air outlet channel (42), and the rear branch channel (34) is connected to the third air outlet channel (43).

3. The electric machine of claim 2, wherein, The main channel (31), the middle branch channel (32), the front branch channel (33), the rear branch channel (34), and the bearing branch channel (35) are all distributed circumferentially along the outer shell structure (10); the first air outlet channel (41), the second air outlet channel (42), and the third air outlet channel (43) all extend axially along the outer shell structure (10), and the first air outlet channel (41), the second air outlet channel (42), and the third air outlet channel (43) are all distributed circumferentially along the outer shell structure (10).

4. The electric machine of claim 1, wherein, The outer shell structure (10) includes a cylindrical body (11), the stator core (21) and the winding (22) are located inside the cylindrical body (11); the main channel (31) includes at least one first channel (311), the first channel (311) is located on the inner wall of the cylindrical body (11) and extends along the axial direction of the cylindrical body (11), the first channel (311) is provided with a middle air inlet (3111), a front air inlet (3112) and a rear air inlet (3113) at intervals, the middle air inlet (3111) is connected to the middle branch channel (32), the front air inlet (3112) is connected to the front branch channel (33), and the rear air inlet (3113) is connected to the rear branch channel (34).

5. The electric machine of claim 4, wherein, There are multiple first channels (311), and the multiple first channels (311) are distributed circumferentially along the cylinder (11). Each first channel (311) has multiple rear air inlets (3113) arranged axially at intervals. The stator core (21) includes two stator structures (211) arranged at intervals, and the middle branch channel (32) is formed between the two stator structures (211). The space between the front part of the cylinder (11) and the stator core (21) forms the front branch channel (33), and the space between the rear part of the cylinder (11) and the stator core (21) forms the rear branch channel (34).

6. The electric machine of claim 4, wherein, The outer shell structure (10) further includes a flange (12) and a front housing (13). The front end of the cylinder (11) is connected to the flange (12). The front housing (13) is installed on the flange (12). The front radial bearing (25) is installed inside the front housing (13). The axial bearing (26) is installed at the front of the cylinder (11) and cooperates with the front radial bearing (25). The bearing branch channel (35) includes a second channel (351) and a cooling channel. The second channel (351) is located inside the flange (12). One end of the second channel (351) is connected to the first channel (311). The other end of the second channel (351) is connected to the gap inside the front radial bearing (25). The cooling channel is located between the front radial bearing (25) and the axial bearing (26). The cooling channel connects the gap inside the front radial bearing (25) and the gap inside the axial bearing (26).

7. The electric machine of claim 6, wherein, The axial bearing (26) has a third channel (261) arranged radially, and the gap between the axial bearing (26), the cylinder (11) and the front housing (13) forms a fourth channel (262). The gap in the axial bearing (26) is connected through the third channel (261) and the fourth channel (262), and the fourth channel (262) is connected to the outside of the motor.

8. The electric machine of claim 7, wherein, There are multiple first channels (311) and multiple second channels (351), and the multiple first channels (311) and multiple second channels (351) are distributed circumferentially along the outer shell structure (10). The number of second channels (351) is less than or equal to the number of first channels (311). Each second channel (351) is connected to a corresponding first channel (311). There are multiple third channels (261), and the multiple third channels (261) are distributed circumferentially along the axial bearing (26). The fourth channel (262) is an annular channel.

9. The electric machine of claim 7, wherein, The cylinder (11) has a third sub-channel (111), and the flange (12) has a fourth sub-channel (121). The two ends of the third sub-channel (111) are connected to the fourth channel (262) and the fourth sub-channel (121) respectively. The fourth sub-channel (121) is connected to the outside of the motor. The third sub-channel (111) and the fourth sub-channel (121) form a second air outlet channel (42).

10. The electric machine of claim 1, wherein, The outer shell structure (10) includes a cylindrical body (11) and a flange (12). The front end of the cylindrical body (11) is connected to the flange (12). The stator core (21) and the winding (22) are located inside the cylindrical body (11). The flange (12) has an axially arranged first sub-channel (122), and the cylindrical body (11) has an axially arranged second sub-channel (112). The two ends of the second sub-channel (112) are respectively connected to the front branch channel (33) and the first sub-channel (122). The first sub-channel (122) is connected to the outside of the motor. The first sub-channel (122) and the second sub-channel (112) form a first air outlet channel (41).

11. The electric machine of claim 1, wherein, The outer casing structure (10) includes a cylindrical body (11), a rear housing (14), and a rear end cover (15). The stator core (21) and the winding (22) are located inside the cylindrical body (11). The rear end of the cylindrical body (11) is connected to the rear housing (14). The rear radial bearing (27) and the rear end cover (15) are both mounted on the rear housing (14). The motor has a fifth sub-channel (431) and a sixth sub-channel (432). The fifth sub-channel (431) passes through the rear housing (14). The housing (14) and the rear end cover (15) are connected at both ends of the fifth sub-channel (431) to the rear branch channel (34) and the outside of the motor, respectively. The sixth sub-channel (432) passes through the rear radial bearing (27) and the rear end cover (15). The two ends of the sixth sub-channel (432) are connected to the rear branch channel (34) and the outside of the motor, respectively. The fifth sub-channel (431) and the sixth sub-channel (432) form the third air outlet channel (43).

12. The electric machine of claim 1, wherein, The motor also includes a fan cover (50), which is disposed on the outer shell structure (10). The channel inside the fan cover (50) is connected to the main channel (31). The fan cover (50) is used to input the air outside the motor into the main channel (31).

13. The electric machine of claim 12, wherein, The hood (50) is a ring structure and is arranged around the outer shell structure (10). The main channel (31) is distributed around the outer shell structure (10). The outer shell structure (10) has multiple main air inlets (16) distributed around its circumference. The multiple main air inlets (16) connect the channel inside the hood (50) and the main channel (31).

14. A blower, characterized by The blower includes a volute (61), a diffuser (62), an impeller (63), and a motor according to any one of claims 1 to 13. The outer casing structure (10) is connected to the volute (61) and the diffuser (62). The diffuser (62) separates the cavity inside the volute (61) from the cavity inside the outer casing structure (10). The impeller (63) is mounted on the end of the rotating shaft (24) and is located inside the cavity of the volute (61).

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