High-speed direct-drive motor and electrical device

Abstract

The application discloses a high-speed direct-drive motor and electrical equipment, and belongs to the technical field of motors. The air-tight moving coil in the high-speed direct-drive motor is connected with the flange in a matched mode, the flange is provided with an air inlet channel, an annular air-tight cavity and a plurality of air outlets, and a gap is formed between the edge portion of the air-tight moving coil, which is away from the rotating shaft, and the flange to form an air outlet channel. In this way, the plurality of air outlets are located between the annular air-tight cavity and the air outlet channel, a wind pressure isolation layer is formed at the air outlet channel by wind pressure, and most of the dust is isolated, and the plurality of air outlets can uniformly release the pressure of the sealing gas in the annular air-tight cavity to the outside, so that the fluid dead zone is avoided, and the sealing reliability of the high-speed direct-drive motor is effectively ensured, and the effective operation of the motor is ensured.

Description

Technical Field

[0001] This application relates to the field of motor technology, and in particular to a high-speed direct-drive motor and electrical equipment. Background Technology

[0002] With the promotion and popularization of permanent magnet motors, the market is seeing an increasing demand for customized high-speed permanent magnet direct drive motors. These high-speed direct drive motors typically require speeds of up to 10,000 RPM. Taking the new energy material sorting field as an example, a classifying wheel is an industrial device used for separating powder particles by size. It achieves high-precision separation of coarse and fine materials based on the principle of centrifugal force. Its core function is to create a centrifugal force field through a high-speed rotating classifying turbine, driving fine particles in the airflow through the gaps between the blades into the collection system. The higher the rotation speed, the finer the separated particles. Therefore, as the core driving component of the new energy material classifying wheel, the performance of the high-speed direct drive motor directly affects the efficiency and accuracy of material sorting. The air duct structure is a key component for the stable operation of the high-speed direct drive motor. Using a high-speed direct drive motor instead of the traditional method helps reduce the number of transmission components, improving system reliability and sorting accuracy. During operation, the classifying wheel generates a large amount of fine dust. If the air duct seal fails, external dust, moisture, and other impurities will enter the motor, causing severe overheating or even insulation failure and damage. Utility Model Content

[0003] This application provides a high-speed direct-drive motor and electrical equipment. It solves the problem in the prior art where poor sealing performance of high-speed direct-drive motors easily leads to motor failure. The technical solution is as follows: On the one hand, a high-speed direct-drive motor is provided, the high-speed direct-drive motor comprising: Shafts, flanges, and airtight rotating rings; The flange is sleeved on the rotating shaft and rotatably connected to the rotating shaft. The side of the flange has an air inlet channel, an annular airtight cavity that communicates with the outlet of the air inlet channel and is distributed around the rotating shaft, and multiple air outlets that are arrayed around the rotating shaft and communicate with the annular airtight cavity. The airtight moving ring is fastened on the rotating shaft and is arranged opposite to the flange along the axial direction of the rotating shaft. The part of the airtight moving ring near the flange is nested and rotatably connected to the part of the flange near the airtight moving ring. There is a gap between the edge of the airtight moving ring away from the rotating shaft and the flange to form an air outlet channel. The air outlet channel is connected to the annular airtight cavity through the plurality of air outlets.

[0004] Optionally, the flange also has a plurality of annularly arrayed heat dissipation fins disposed in the annular airtight cavity, wherein the first end of each heat dissipation fin is close to the air outlet, the second end of the heat dissipation fin is close to the outlet of the air inlet channel, and the radial height of the heat dissipation fin is less than the radial height of the annular airtight cavity; wherein the plurality of heat dissipation fins and the plurality of air outlets are staggered.

[0005] Optionally, the plurality of air outlets are distributed at equal intervals, and / or the plurality of heat dissipation fins are distributed at equal intervals.

[0006] Optionally, the plurality of air outlets have the same aperture, or the aperture of the air outlet near the outlet of the air intake channel is smaller than the aperture of the air outlet far from the outlet of the air intake channel.

[0007] Optionally, the flange includes: a flange body and an air guide ring, wherein the flange body is rotatably disposed relative to the airtight moving ring and has a mounting cavity on the side facing the airtight moving ring; the flange body is provided with the air inlet channel; The air guide ring is installed inside the mounting cavity and forms an annular airtight cavity with the side wall of the mounting cavity. The air guide ring is provided with multiple air outlets and multiple heat dissipation fins.

[0008] Optionally, the air guide ring includes: a first ring body and a second ring body connected to each other, wherein the first ring body is closer to the air intake channel than the second ring body, and an annular airtight cavity is provided between the outer ring side of the first ring body and the side wall of the mounting cavity, and the inner ring side of the first ring body is in contact with the flange body; both the inner ring side and the outer ring side of the second ring body are in contact with the flange body.

[0009] Optionally, the high-speed direct drive motor further includes: a bearing sleeved on the rotating shaft, the outer ring of the bearing contacting the flange, and the bearing and the air intake channel being arranged radially opposite to each other along the rotating shaft.

[0010] Optionally, the airtight moving ring has multiple annular grooves arranged in an array on the side facing the flange, and the flange has multiple annular protrusions arranged in an array that correspond one-to-one with the multiple annular grooves on the side facing the airtight moving ring; each annular protrusion extends into the corresponding annular groove and rotates relative to the annular groove; wherein, there is a gap between the top of the annular protrusion and the bottom of the annular groove.

[0011] Optionally, a portion of the inner wall of the portion of the flange that sleeves the shaft has at least one groove.

[0012] On the other hand, an electrical device is provided, the electrical device comprising: a device body and a high-speed direct drive motor installed in the device body, the high-speed direct drive motor being any of the high-speed direct drive motors given above.

[0013] The beneficial effects of the technical solutions provided in this application include at least the following: In the high-speed direct-drive motor, the airtight moving ring and flange are connected in a mating manner. The flange has an air inlet channel, an annular airtight cavity, and multiple air outlets. A gap exists between the edge of the airtight moving ring away from the shaft and the flange to form an air outlet channel. Thus, multiple air outlets are located between the annular airtight cavity and the air outlet channel. At the air outlet channel, a pressure isolation layer is formed by wind pressure, isolating most dust particles. The multiple air outlets allow the sealing gas pressure within the annular airtight cavity to be released evenly to the outside, avoiding fluid dead zones. This effectively ensures the sealing reliability of the high-speed direct-drive motor and guarantees its efficient operation. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the structure of a high-speed direct-drive motor provided in an embodiment of this application; Figure 2 This is a cross-sectional view of a high-speed direct-drive motor provided in an embodiment of this application; Figure 3 This is an exploded schematic diagram of a portion of the structure of a high-speed direct-drive motor provided in an embodiment of this application; Figure 4 This is a cross-sectional view of another high-speed direct-drive motor provided in an embodiment of this application; Figure 5 yes Figure 4 A magnified view of a portion of the image; Figure 6 This application provides an exploded view of a partial structure of another high-speed direct-drive motor.

[0016] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0019] It should be understood that the phrase "one embodiment" or "an embodiment" throughout the specification means that a specific feature, structure, or characteristic related to the embodiment is included in at least one embodiment of the present invention. Therefore, "in one embodiment" or "in an embodiment" appearing throughout the specification do not necessarily refer to the same embodiment. Furthermore, these specific features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

[0020] Please refer to Figure 1 , Figure 2 and Figure 3 , Figure 1 This is a schematic diagram of the structure of a high-speed direct-drive motor provided in an embodiment of this application. Figure 2 This is a cross-sectional view of a high-speed direct-drive motor provided in an embodiment of this application. Figure 3 This is an exploded view of a portion of the structure of a high-speed direct-drive motor according to an embodiment of this application. The high-speed direct-drive motor may include: a rotating shaft 100, a flange 200, and an airtight moving coil 300.

[0021] The flange 200 in the high-speed direct-drive motor can be sleeved on the rotating shaft 100 and rotatably connected to the rotating shaft 100. The flange 200 has an air intake channel 201 on its side, an annular airtight cavity 202 communicating with the outlet of the air intake channel 201 and distributed around the rotating shaft 100, and multiple air outlets 203 arranged in an array around the rotating shaft 100 and communicating with the annular airtight cavity. It should be noted that gas with a certain pressure can be input into the air intake channel 201 through an external air supply device.

[0022] In the high-speed direct drive motor, the airtight moving ring 300 is securely sleeved on the rotating shaft 100 and is positioned opposite the flange 200 along the axial direction of the rotating shaft 100. The portion of the airtight moving ring 300 near the flange 200 is nested and rotatably connected to the portion of the flange 200 near the airtight moving ring 300, meaning the airtight moving ring 300 can rotate relative to the flange 200. A gap exists between the edge of the airtight moving ring 300 away from the rotating shaft 100 and the flange 200 to form an air outlet channel 301. This air outlet channel 301 communicates with the annular airtight cavity 202 through multiple air outlets 203. Here, the airtight moving ring 300 can rotate synchronously with the rotating shaft 100, and the side of the airtight moving ring 300 away from the flange 200 has multiple dynamic balancing holes k, which can provide airtight sealing and dynamic balancing for the high-speed direct drive motor.

[0023] In this embodiment, the airtight moving coil 300 and the flange 200 in the high-speed direct drive motor are connected to each other. The flange 200 has an air inlet channel 201, an annular airtight cavity 202, and multiple air outlets 203. A gap exists between the edge of the airtight moving coil 300 away from the rotating shaft 100 and the flange 200 to form the air outlet channel 301. Thus, the multiple air outlets 203 are located between the annular airtight cavity 202 and the air outlet channel 301. A wind pressure isolation layer is formed at the air outlet channel 301 by wind pressure, isolating most dust particles. The multiple air outlets 203 allow the sealing gas pressure inside the annular airtight cavity 202 to be released evenly to the outside, avoiding fluid dead zones, thereby effectively ensuring the sealing reliability of the high-speed direct drive motor and ensuring its effective operation.

[0024] In summary, this application provides a high-speed direct-drive motor, which may include: a rotating shaft 100, a flange 200, and an airtight moving coil 300. The airtight moving coil 300 and the flange 200 are connected and cooperate with each other. The flange 200 has an air inlet channel 201, an annular airtight cavity 202, and multiple air outlets 203. A gap exists between the edge of the airtight moving coil 300 away from the rotating shaft 100 and the flange 200 to form the air outlet channel 301. Thus, the multiple air outlets 203 are located between the annular airtight cavity 202 and the air outlet channel 301. A wind pressure isolation layer is formed at the air outlet channel 301 by wind pressure, isolating most dust particles. The multiple air outlets 203 allow the sealing gas pressure within the annular airtight cavity 202 to be released evenly to the outside, avoiding fluid dead zones, thereby effectively ensuring the sealing reliability of the high-speed direct-drive motor and guaranteeing its effective operation.

[0025] Optional, please refer to Figure 4 , Figure 5 and Figure 6 , Figure 4 This is a cross-sectional view of another high-speed direct-drive motor provided in an embodiment of this application. Figure 5 yes Figure 4 A partially enlarged schematic diagram, Figure 6 This application provides an exploded view of a partial structure of another high-speed direct-drive motor according to an embodiment. The flange 200 in the high-speed direct-drive motor also has multiple annularly arrayed heat dissipation fins 204 disposed within an annular airtight cavity 202. The first end of each heat dissipation fin 204 is near an air outlet 203, and the second end is near the outlet of the air intake channel 201. The radial height of the heat dissipation fin 204 is less than the radial height of the annular airtight cavity 202. The multiple heat dissipation fins 204 are staggered with the multiple air outlets 203. In this configuration, by providing multiple annularly distributed heat dissipation fins 204 within the annular airtight cavity 202, the heat dissipation fins 204 can accelerate the heat dissipation of the bearings within the high-speed direct-drive motor and can evenly distribute the gas entering the annular airtight cavity 202 from the air intake channel 201, further ensuring that the sealing gas pressure is released evenly to the outside, avoiding fluid dead zones, thus further ensuring the sealing reliability of the high-speed direct-drive motor and guaranteeing its effective operation.

[0026] In this embodiment, the flange 200 has multiple air outlets 203 distributed at equal intervals, and / or multiple heat dissipation fins 204 distributed at equal intervals. Here, the figure shows multiple air outlets 203 and multiple heat dissipation fins 204 distributed at equal intervals.

[0027] For example, in one possible scenario, the orifices 203 of the flange 200 are all the same diameter. Alternatively, in another possibility, the orifice diameter of the multiple air outlets 203 near the outlet of the air inlet channel 201 is smaller than the orifice diameter of the air outlets 203 farther from the outlet of the air inlet channel 201. In this way, because the gas pressure near the air inlet of the air inlet channel 201 is high, the unequal-sized openings result in a more uniform circumferential gas flow and a better overall sealing effect.

[0028] Optional, such as Figure 5 and Figure 6 As shown, the flange 200 in the high-speed direct drive motor may include: a flange body A1 and an air guide ring A2. The flange body A1 is rotatably disposed relative to the airtight moving ring 300 and has an annular mounting cavity q1 on the side facing the airtight moving ring 300. The flange body A1 is provided with an air inlet channel 201. The air guide ring A2 is installed in the mounting cavity q1 and forms an annular airtight cavity 202 with the side wall of the mounting cavity q1. The air guide ring A2 is provided with multiple air outlets 203 and multiple heat dissipation fins 204. In this case, the flange body A1 and the air guide ring A2 are set separately. The air guide ring A2 is set in the mounting cavity q1 of the flange body A1 and forms an annular airtight cavity 202 with the flange body A1, which facilitates assembly.

[0029] In the embodiments of this application, such as Figure 5 As shown, the air guide ring A2 may include: a first ring body A21 and a second ring body A22 that are fastened together and arranged axially along the rotating shaft 100. The first ring body A21 is closer to the air intake channel 201 than the second ring body A22, and an annular airtight cavity 202 is provided between the outer ring side of the first ring body A21 and the side wall of the mounting cavity q1. The inner side of the first ring body A21 is in contact with the flange body A1. The inner and outer ring sides of the second ring body A22 are both in contact with the flange body A1.

[0030] Here, the thickness of the first ring body A21 is less than the thickness of the second ring body A22, and the second ring body A22 is provided with multiple air outlets 203.

[0031] Optional, such as Figure 5 As shown, the high-speed direct-drive motor also includes a bearing 400 sleeved on the rotating shaft 100. The outer ring of the bearing 400 contacts the flange 200, and the bearing 400 and the air intake channel 201 are arranged radially opposite to each other along the rotating shaft 100. In this way, when the gas flows through the air intake channel 201, it can carry away the heat generated by the bearing 400 when the motor is running at high speed, reduce the bearing temperature, reduce bearing wear, and improve the bearing's service life and operating accuracy.

[0032] In the embodiments of this application, such as Figure 5 As shown, the airtight moving ring 300 has multiple arrayed annular grooves c1 on the side facing the flange 200, and the flange 200 has multiple arrayed annular protrusions t1 on the side facing the airtight moving ring 300, each corresponding to one of the annular grooves c1. Each annular protrusion t1 extends into the corresponding annular groove c1 and rotates relative to the annular groove c1. A gap z exists between the top of the annular protrusion t1 and the bottom of the annular groove c1. Here, when the flange 200 includes a flange body A1 and a guide ring A2, the flange body A1 is provided with multiple annular protrusions t1. In this case, the multiple annular grooves c1 in the airtight moving ring 300 and the multiple annular protrusions t1 in the flange 200 form an axial multi-stage labyrinth sealing groove, which can effectively seal the interior of the high-speed direct drive motor and prevent dust and other contaminants from entering the high-speed direct drive motor.

[0033] Optional, such as Figure 5As shown, a portion of the inner wall of the part of the flange 200 that is fitted with the rotating shaft 100 has at least one groove c2. In this case, the groove c2 in the portion of the inner wall of the part of the flange 200 that is fitted with the rotating shaft 100 makes the radial distance between the flange 200 and the rotating shaft 100 in this region greater than the radial distance between the flange 200 and the rotating shaft 100 in other regions, forming a radial multi-stage labyrinth seal groove, further ensuring sealing of the interior of the high-speed direct drive motor, and forming a multi-stage seal with the axial multi-stage labyrinth seal groove. Here, the inner wall of the portion of the flange 200 that is fitted with the rotating shaft 100 is the sidewall opposite to the outer surface of the rotating shaft 100.

[0034] In summary, this application provides a high-speed direct-drive motor, which may include: a rotating shaft 100, a flange 200, and an airtight moving coil 300. The airtight moving coil 300 and the flange 200 are connected and cooperate with each other. The flange 200 has an air inlet channel 201, an annular airtight cavity 202, and multiple air outlets 203. A gap exists between the edge of the airtight moving coil 300 away from the rotating shaft 100 and the flange 200 to form the air outlet channel 301. Thus, the multiple air outlets 203 are located between the annular airtight cavity 202 and the air outlet channel 301. A wind pressure isolation layer is formed at the air outlet channel, isolating most dust particles. The multiple air outlets allow the sealing gas pressure within the annular airtight cavity to be released evenly to the outside, avoiding fluid dead zones, thereby effectively ensuring the sealing reliability of the high-speed direct-drive motor and guaranteeing its effective operation.

[0035] In this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The term "multiple" refers to two or more unless otherwise expressly defined.

[0036] The above description is merely an optional embodiment of this application and is not intended to limit this application. 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.

Claims

1. A high-speed direct-drive motor, characterized in that, include: Shafts, flanges, and airtight rotating rings; The flange is sleeved on the rotating shaft and rotatably connected to the rotating shaft. The side of the flange has an air inlet channel, an annular airtight cavity that communicates with the outlet of the air inlet channel and is distributed around the rotating shaft, and multiple air outlets that are arrayed around the rotating shaft and communicate with the annular airtight cavity. The airtight moving ring is fastened on the rotating shaft and is arranged opposite to the flange along the axial direction of the rotating shaft. The part of the airtight moving ring near the flange is nested and rotatably connected to the part of the flange near the airtight moving ring. There is a gap between the edge of the airtight moving ring away from the rotating shaft and the flange to form an air outlet channel. The air outlet channel is connected to the annular airtight cavity through the plurality of air outlets.

2. The high-speed direct-drive motor according to claim 1, characterized in that, The flange also has multiple annularly arrayed heat dissipation fins disposed within the annular airtight cavity. The first end of each heat dissipation fin is close to the air outlet, and the second end of each heat dissipation fin is close to the outlet of the air inlet channel. The radial height of the heat dissipation fin is less than the radial height of the annular airtight cavity. The multiple heat dissipation fins are staggered with the multiple air outlets.

3. The high-speed direct-drive motor according to claim 2, characterized in that, The plurality of air outlets are distributed at equal intervals, and / or the plurality of heat dissipation fins are distributed at equal intervals.

4. The high-speed direct-drive motor according to claim 2, characterized in that, The plurality of air outlets have the same aperture, or the aperture of the air outlet near the outlet of the air intake channel is smaller than the aperture of the air outlet far from the outlet of the air intake channel.

5. The high-speed direct-drive motor according to any one of claims 2-4, characterized in that, The flange includes: a flange body and an air guide ring. The flange body is rotatably disposed relative to the airtight moving ring and has a mounting cavity on the side facing the airtight moving ring. The flange body is provided with the air inlet channel. The air guide ring is installed inside the mounting cavity and forms an annular airtight cavity with the side wall of the mounting cavity. The air guide ring is provided with multiple air outlets and multiple heat dissipation fins.

6. The high-speed direct-drive motor according to claim 5, characterized in that, The air guide ring includes: a first ring body and a second ring body connected to each other. The first ring body is closer to the air intake channel than the second ring body. An annular airtight cavity is provided between the outer ring side of the first ring body and the side wall of the mounting cavity. The inner side of the first ring body is in contact with the flange body. The inner and outer ring sides of the second ring body are both in contact with the flange body.

7. The high-speed direct-drive motor according to any one of claims 1-4, 6, characterized in that, The high-speed direct drive motor further includes: a bearing sleeved on the rotating shaft, the outer ring of the bearing contacting the flange, and the bearing and the air intake channel being arranged radially opposite to each other along the rotating shaft.

8. The high-speed direct-drive motor according to claim 7, characterized in that, The airtight moving ring has multiple annular grooves arranged in an array on the side facing the flange, and the flange has multiple annular protrusions arranged in an array that correspond one-to-one with the multiple annular grooves on the side facing the airtight moving ring; each annular protrusion extends into the corresponding annular groove and rotates relative to the annular groove; wherein, there is a gap between the top of the annular protrusion and the bottom of the annular groove.

9. The high-speed direct-drive motor according to claim 8, characterized in that, A portion of the inner wall of the part of the flange that is fitted with the shaft has at least one groove.

10. An electrical device, characterized in that, include: The equipment body and a high-speed direct drive motor installed in the equipment body, wherein the high-speed direct drive motor is any one of the high-speed direct drive motors described in claims 1-9.

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