Rotor air cooling device

Abstract

This invention relates to the field of rotor air cooling technology, specifically to a rotor air cooling device, including a support frame with a column fixedly mounted on it, a support sleeve, a fan, a rotor support assembly, a height adjustment assembly, and a circumferential locking assembly. The support sleeve is rotatably mounted on the column, and several positioning rings are slidably arranged at intervals along the axial direction on the support sleeve. Several fans are mounted on the support frame, each fan is independently controlled, each positioning ring is equipped with a rotor support assembly, each rotor support assembly is equipped with a height adjustment assembly, and the circumferential locking assembly is located inside the column. Through the cooperation of these components, the height position of each layer of the placement rack can be independently adjusted, thereby facilitating flexible adjustment of the placement space according to the rotor size and improving the uniformity of rotor cooling.

Description

Technical Field

[0001] This invention relates to the field of rotor air cooling technology, and in particular to a rotor air cooling device. Background Technology

[0002] A rotor is a rotating body supported by bearings and is a rotating component in equipment such as motors and generators. Its main function is to convert electrical energy into mechanical energy or mechanical energy into electrical energy. It generates torque through interaction with the stator, thus realizing energy conversion. During the production of rotors, in order to remove moisture, cure insulating varnish, and remove residual liquids from the processing process to ensure electrical safety, the rotor needs to be heated and dried. After the rotor has been heated and dried, its body temperature is usually high. In order to facilitate subsequent operations, it needs to be cooled. At present, air cooling is a common technology for cooling rotors.

[0003] In existing technology, when air-cooling a rotor, the rotor is usually placed on a multi-layered rack, and then the fan is placed at the bottom of the rack with the fan's outlet facing upwards. After the worker places the dried rotor on the rack, the fan can be turned on, and the heat of the rotor can be carried away by the airflow to achieve cooling.

[0004] However, in practical applications, since the height of multi-layer racks is usually fixed, it is difficult to adjust them according to the operator's position or the size of the rotor. If the rotor is large, the space between two adjacent racks may not be enough to place the rotor, making it difficult to put the rotor in or causing it to interfere with the upper tray after being put in. However, if the rotor is small, the fixed spacing between each rack will waste space and affect the airflow velocity when passing through each rack, thus affecting the cooling efficiency. Summary of the Invention

[0005] To address the aforementioned technical problems, embodiments of the present invention provide a rotor air-cooling device that enables independent adjustment of the height and position of each layer of the placement rack, thereby facilitating flexible adjustment of the placement space according to the rotor size and improving the uniformity of rotor cooling.

[0006] To achieve the above objectives, embodiments of the present invention provide a rotor air-cooling device, including a support frame, on which a column is fixedly mounted, and further comprising: A support sleeve is rotatably mounted on the column, and a plurality of positioning rings are slidably arranged at intervals along the axial direction on the support sleeve. The fan is provided on the support frame, and each fan is set to be independently controlled; The rotor bearing assembly is provided on each of the positioning rings for bearing the rotor to be cooled; A height adjustment component is provided on each of the rotor bearing components. When the positioning ring is adjusted along the axial direction on the support sleeve, the relative position between the positioning ring and the support sleeve is fixed. A circumferential locking component is disposed inside the column and is used to fix the relative position between the support sleeve and the column when it is necessary to adjust the relative position between the positioning ring and the support sleeve.

[0007] In one possible implementation, the rotor support assembly, in order to support the rotor to be cooled, includes: An annular support frame is provided on each of the positioning rings, and each of the annular support frames is fixedly connected to the positioning rings by a number of connecting rods arranged coaxially and at equal angles. Each of the aforementioned annular support frames has several partitions fixedly arranged at equal angles in a circular shape.

[0008] In one possible implementation, when it is necessary to adjust the relative position between two adjacently arranged annular support brackets to facilitate cooling of rotors of different sizes, the height adjustment assembly includes: A spiral guide bar is coaxially disposed on the outside of the support sleeve; The guide groove is provided on the inner side of each positioning ring, and the guide groove is slidably adapted to the spiral guide bar; A height positioning mechanism is provided on each of the positioning rings, which is used to fix the relative position between the positioning ring and the support sleeve after the height position of the positioning ring is adjusted.

[0009] In one possible implementation, to fix the adjusted height position of the annular support, the height positioning mechanism includes: A limiting sliding frame is fixedly provided on each of the positioning rings, and a positioning insert is slidably provided inside the limiting sliding frame; A limiting component is provided inside each of the limiting sliding frames to fix the relative position of the positioning insert inside the limiting sliding frame.

[0010] The support sleeve has several positioning grooves at equal angles around its outer circumference. These positioning grooves are arranged along the axial direction of the support sleeve and are adapted to the positioning insert.

[0011] In one possible implementation, the limiting member includes, in order to fix the position of the positioning insert, the limiting member includes: Each of the limiting sliding frames has two ratchet racks symmetrically and fixedly installed inside; Each positioning insert has a spring fixedly provided at its tail end, and the two free ends of each spring are configured with a ratchet structure that is adapted to the corresponding ratchet bar.

[0012] Each of the reeds has two pressing blocks symmetrically and fixedly arranged on it, and the pressing blocks are slidably adapted to the limiting sliding frame.

[0013] In one possible implementation, to fix the relative position between the support sleeve and the column when adjusting the height of the annular support bracket, the circumferential locking assembly includes: The driving component is fixedly installed inside the column; The locking mechanism is provided at the output end of the drive component to fix the relative position between the column and the support sleeve.

[0014] In one possible implementation, the locking mechanism includes: An upper sliding plate and a lower sliding plate are slidably disposed inside the column. The bottom of the lower sliding plate is fixedly connected to the output end of the drive component. A support spring is fixedly disposed between the upper sliding plate and the lower sliding plate. A locking block is fixedly installed on the upper sliding plate.

[0015] The bottom of the support sleeve is provided with several locking grooves at equal angles in a circumferential shape, and the locking grooves are adapted to the locking block.

[0016] Compared with the prior art, the rotor air-cooling device provided in this embodiment of the invention has the following significant technical advantages: 1. Compared with the prior art, the rotor air-cooling device provided in this embodiment of the invention, through the cooperation of the spiral guide bar and the guide groove, enables the rotating positioning ring to drive the annular support frame to rise and fall along the axial direction, realizing the independent and continuous adjustment of the height of each layer of the placement rack. This allows for flexible adjustment of the layer spacing according to the actual size of the rotor, avoiding the problem of large-sized rotors being difficult to place or interference with the upper annular support frame, reducing the space waste caused by small-sized rotors, and improving the adaptability to rotors of different specifications.

[0017] 2. Compared with the prior art, the rotor air-cooling device provided in this embodiment of the invention can temporarily fix the support sleeve and the column when adjusting the height of the positioning ring by cooperating with the driving component, the locking block and the locking groove, so as to prevent the support sleeve from rotating accidentally during the adjustment process, thereby ensuring the stability and accuracy of the height adjustment and further improving the reliability of operation.

[0018] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments of this application will be briefly introduced below. Obviously, the drawings described below are merely some exemplary embodiments of this application. For those skilled in the art, other drawings can be obtained based on the content of the exemplary embodiments of this application and these drawings without any creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of a rotor air-cooling device in one embodiment of the present invention; Figure 2 for Figure 1 A schematic diagram of the overall cross-sectional structure from another angle; Figure 3 for Figure 1 A schematic diagram of the structure of the middle support sleeve, positioning ring, spiral guide strip, limiting sliding frame and rotor bearing assembly; Figure 4 for Figure 1 A schematic diagram of the structure of the support sleeve, positioning ring, spiral guide bar, limiting sliding frame and rotor bearing assembly from another angle; Figure 5 for Figure 1 A schematic diagram of the structure of the positioning ring, guide groove, limiting sliding frame and rotor bearing assembly; Figure 6 for Figure 1 A cross-sectional view of the mate between the center positioning ring and the height adjustment component; Figure 7 for Figure 1 A cross-sectional view of the positioning ring and height adjustment component from another angle. Figure 8 for Figure 1 A cross-sectional view of the height adjustment component; Figure 9 for Figure 1 A cross-sectional view of the circumferential locking component.

[0021] In the diagram: 1. Load-bearing frame; 2. Column; 3. Support sleeve; 4. Positioning ring; 5. Fan; 101. Circular support frame; 102. Connecting rod; 103. Partition plate; 201. Spiral guide bar; 202. Guide groove; 203. Limiting sliding frame; 204. Positioning insert; 205. Positioning groove; 206. Ratchet; 207. Spring; 208. Pressing block; 301. Driving component; 302. Upper sliding plate; 303. Lower sliding plate; 304. Support spring; 305. Locking block; 306. Locking groove. Detailed Implementation

[0022] To make the technical problems to be solved, the technical solutions, and the beneficial effects of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0023] To keep the drawings concise, each figure only schematically shows the parts relevant to the invention, and they do not represent the actual structure of the product. Furthermore, for ease of understanding, in some figures, components with the same structure or function are shown only schematically, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one."

[0024] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0025] It should be noted that when an element is referred to as being "set on" another element, it can be directly set on the other element or indirectly set on the other element. It should be understood that the terms "length," "width," "upper," "lower," "front," "rear," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description, and are not intended to 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 of the invention.

[0026] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a number" means two or more, unless otherwise explicitly specified.

[0027] Please see Figures 1 to 5 This illustration shows a rotor air-cooling device according to an embodiment of the present invention, including a support frame 1, on which a column 2 is fixedly mounted, and further including a support sleeve 3, a fan 5, a rotor bearing assembly, a height adjustment assembly, and a circumferential locking assembly. The support sleeve 3 is rotatably mounted on the column 2, and a plurality of positioning rings 4 are slidably arranged at intervals along the axial direction on the support sleeve 3. A plurality of fans 5 are mounted on the support frame 1, each fan 5 being independently controlled. Each positioning ring 4 is provided with a rotor bearing assembly for supporting the rotor to be cooled. The rotor bearing assembly includes an annular support frame 101 and a partition plate 103, as shown below. Figures 3 to 5 As shown, each positioning ring 4 is coaxially provided with an annular support frame 101, and each annular support frame 101 is fixedly connected to the positioning ring 4 by a number of connecting rods 102 arranged coaxially at equal angles. Each annular support frame 101 is provided with a number of partitions 103 fixedly arranged in a circular shape at equal angles.

[0028] When the rotor to be cooled needs to be cooled, the rotor is first placed on the annular support frame 101. The partition 103 can prevent the rotors from colliding. Each annular support frame 101 can hold one layer of rotors. When cooling the rotor, the operator can adjust the number of support frames according to the number and size of the rotors.

[0029] When cooling the rotor, the fan 5 can be turned on. After the fan 5 is started, it blows air upward. At this time, the airflow passes through the gap between the annular support frame 101 of each layer to cool the rotor. The cooling efficiency can be adjusted by controlling the number of fans 5 in the open state. For example, more fans 5 can be turned on when the ambient temperature is high, and only a few fans 5 can be turned on when the ambient temperature is low, thereby controlling the cooling efficiency. During the cooling process, the circumferential locking component is in the closed state. One of the annular support frames 101 can be held and pushed to rotate. At the same time, the support sleeve 3 is pushed to rotate on the column 2 through the setting of the connecting rod 102, thereby adjusting the air cooling position.

[0030] When cooling is required for a large rotor, the relative position between two adjacent annular support brackets 101 needs to be adjusted by setting the height adjustment component. During the adjustment process, the circumferential locking component is in working state, and the relative position between the support sleeve 3 and the column 2 is fixed, so that the height position of the annular support bracket 101 can be adjusted by the positioning ring 4.

[0031] Each rotor bearing assembly is equipped with a height adjustment component. After the positioning ring 4 is adjusted along the axial direction on the support sleeve 3, the relative position between the positioning ring 4 and the support sleeve 3 is fixed. The height adjustment component includes a spiral guide bar 201, a guide groove 202, and a height positioning mechanism. Figures 3 to 8 As shown, a spiral guide bar 201 is coaxially arranged on the outside of the support sleeve 3. A guide groove 202 is opened on the inner side of each positioning ring 4. The guide groove 202 and the spiral guide bar 201 are slidably adapted. Each positioning ring 4 is provided with a height positioning mechanism, which is used to fix the relative position between the positioning ring 4 and the support sleeve 3 after adjusting the height position of the positioning ring 4. Since each layer of positioning ring 4 is independent of each other, the height of each layer can be adjusted individually according to the rotor size.

[0032] When it is necessary to adjust the height of a certain positioning ring 4, first fix the relative position of the support sleeve 3 and the column 2, and then release the height positioning mechanism on the positioning ring 4. At this time, the positioning ring 4 can be rotated manually. The guide groove 202 on the inner side of the positioning ring 4 slides along the spiral guide bar 201 on the outer side of the support sleeve 3. Under the action of the spiral guide bar 201, the positioning ring 4 can move along the axis of the support sleeve 3 while rotating. After the positioning ring 4 is rotated to the required height, the positioning ring 4 can be locked onto the support sleeve 3 again by the height positioning mechanism, so as to facilitate the adaptation to rotors of different sizes.

[0033] The height positioning mechanism includes a limiting sliding frame 203 and a limiting component, such as... Figures 6 to 8 As shown, each positioning ring 4 is fixedly provided with a limiting sliding frame 203, and a positioning insert 204 is slidably arranged inside the limiting sliding frame 203. Each limiting sliding frame 203 is provided with a limiting component to fix the relative position of the positioning insert 204 inside the limiting sliding frame 203. The support sleeve 3 has several positioning grooves 205 opened at equal angles in a circumferential shape on its outside. The positioning grooves 205 are arranged along the axial direction of the support sleeve 3 and are adapted to the positioning insert 204.

[0034] After adjusting the positioning ring 4 to the specified height, by setting the limiting component, first release the locking of the limiting component, and manually push the positioning insert 204 towards the positioning groove 205 until the front end of the positioning insert 204 is inserted into the corresponding positioning groove 205 outside the support sleeve 3. At the same time, with the cooperation of the spiral guide 201, the up and down movement of the positioning ring 4 can be restricted. At this time, the locking of the limiting component can be restored. If you want to adjust the height again, move the positioning insert 204 out of the corresponding positioning groove 205 and then rotate the positioning ring 4 again.

[0035] The limiting components include a ratchet rack 206 and a spring 207, such as Figure 8 As shown, each limiting sliding frame 203 has two ratchet racks 206 symmetrically and fixedly installed inside, and each positioning insert 204 has a spring 207 fixedly installed at its tail. The two free ends of each spring 207 are set as ratchet structures, which are adapted to the corresponding ratchet racks 206. Each spring 207 has two pressing blocks 208 symmetrically and fixedly installed on it, and the pressing blocks 208 are slidably adapted to the limiting sliding frame 203.

[0036] When the positioning insert 204 needs to be pushed into the corresponding positioning groove 205, the pressing block 208 pushes the spring 207 to move, thereby pushing the positioning insert 204 to move. At this time, the ratchet structure at both ends of the spring 207 slides into the ratchet bar 206 in one direction, which locks the exit direction of the positioning insert 204, thereby preventing it from being accidentally released. The locking is completed when the positioning insert 204 is pushed into the positioning groove 205.

[0037] When it is necessary to remove the positioning insert 204, the operator needs to simultaneously squeeze the two pressing blocks 208 to cause the ratchet structure at both ends of the spring 207 to retract inward to disengage from the ratchet bar 206, thereby releasing the lock on the positioning insert 204, at which point the positioning insert 204 can be pulled outward.

[0038] A circumferential locking assembly is disposed inside the column 2 and is used to fix the relative position of the support sleeve 3 and the column 2 when the relative position between the positioning ring 4 and the support sleeve 3 needs to be adjusted. The circumferential locking assembly includes a driving component 301 and a locking mechanism, such as... Figure 9 As shown, a drive component 301 is fixedly installed inside the column 2. The drive component 301 is preferably an electric cylinder. The output end of the drive component 301 is provided with a locking mechanism to fix the relative position between the column 2 and the support sleeve 3.

[0039] When it is necessary to adjust the relative position between the positioning ring 4 and the support sleeve 3, the drive component 301 is activated to push the locking mechanism upward until the locking mechanism engages with one of the locking grooves 306 at the bottom of the support sleeve 3. This locks the support sleeve 3 circumferentially onto the column 2, thereby preventing the support sleeve 3 from rotating when the positioning ring 4 is rotated. After the adjustment of the positioning ring 4 is completed, the drive component 301 is retracted. At this time, the locking mechanism disengages from the corresponding locking groove 306, allowing the support sleeve 3 to return to a free rotation state.

[0040] The locking mechanism includes an upper sliding plate 302, a lower sliding plate 303, and a locking block 305, such as Figure 9 As shown, the upper sliding plate 302 and the lower sliding plate 303 are both slidably disposed inside the column 2. The bottom of the lower sliding plate 303 is fixedly connected to the output end of the drive component 301. A support spring 304 is fixedly disposed between the upper sliding plate 302 and the lower sliding plate 303. A locking block 305 is fixedly disposed on the upper sliding plate 302. The bottom of the support sleeve 3 is provided with several locking grooves 306 at equal angles in a circumferential shape. The locking grooves 306 are adapted to the locking blocks 305.

[0041] The drive unit 301 pushes the sliding plate 303 to move. The sliding plate 303, through the support spring 304, pushes the upper sliding plate 302 to move. The upper sliding plate 302 causes the locking block 305 to move upward. When the locking block 305 is not in the corresponding locking groove 306, the locking block 305 contacts the bottom side of the support sleeve 3. As the drive unit 301 pushes out, the support spring 304 is compressed. At this time, the top of the locking block 305 slides with the bottom of the support sleeve 3. When the locking block 305 is inserted... The support sleeve 3 is allowed to rotate to align with the locking groove 306. When the locking block 305 is not aligned with the locking groove 306, the support spring 304 is compressed, and the top of the locking block 305 slides with the bottom of the support sleeve 3. After one of the locking grooves 306 moves above the locking block 305, the support spring 304 releases pressure, thereby pushing the upper sliding plate 302 and the locking block 305 to move upward until the locking block 305 is inserted into the corresponding locking groove 306 at the bottom of the support sleeve 3 to complete the locking.

[0042] When it is necessary to disengage the lock, retract the drive component 301, thereby causing the sliding plate 303 to descend until the locking block 305 exits the locking groove 306, which will allow the support sleeve 3 to return to a rotatable state.

[0043] When the rotor to be cooled needs to be cooled using an air-cooling device, the rotor needs to be placed on the annular support frame 101 first. The partition 103 can prevent collisions between the rotors. When cooling the rotor, the operator can adjust the number of support frames according to the number and size of the rotors. When cooling the rotor, the fan 5 can be turned on. After the fan 5 is started, it blows air upward. At this time, the airflow passes through the gaps between the annular support frames 101 to cool the rotor. The cooling efficiency can be adjusted by controlling the number of fans 5 in the open state. During the cooling process, the locking block 305 disengages from the locking groove 306, and one of the annular support frames 101 can be held and pushed to rotate. At the same time, the connecting rod 102 pushes the support sleeve 3 to rotate on the column 2, thereby adjusting the air-cooling position.

[0044] When cooling a large rotor is required, and when adjusting the height of the corresponding annular support 101, the drive unit 301 is activated to move the sliding plate 303. The sliding plate 303 then moves the upper sliding plate 302 via the support spring 304. The upper sliding plate 302 moves the locking block 305 upward. When the locking block 305 is not in the corresponding locking groove 306, it contacts the bottom side of the support sleeve 3. As the drive unit 301 pushes out, the support spring 304 is compressed. At this time, the top of the locking block 305 slides against the bottom of the support sleeve 3. Before the locking block 305 is inserted, the support sleeve 3 is allowed to rotate to align with the locking groove 306. When the locking block 305 is not aligned with the locking groove 306, the support spring 304 is compressed, and the top of the locking block 305 slides with the bottom of the support sleeve 3. After one of the locking grooves 306 moves above the locking block 305, the support spring 304 releases pressure, thereby pushing the upper sliding plate 302 and the locking block 305 to move upward until the locking block 305 is inserted into the corresponding locking groove 306 at the bottom of the support sleeve 3, thus completing the locking and preventing the support sleeve 3 from rotating when the positioning ring 4 is rotated.

[0045] When adjusting the height of a certain positioning ring 4, first release the lock on the positioning ring 4. Then, simultaneously pinch the two pressing blocks 208 to cause the ratchet structure at both ends of the spring 207 to retract inward and disengage from the ratchet rack 206, thereby releasing the lock on the positioning insert 204. The positioning insert 204 can then be pulled outward, allowing the positioning ring 4 to be rotated manually. At this time, the guide groove 202 on the inner side of the positioning ring 4 slides along the spiral guide bar 201 on the outside of the support sleeve 3. Under the action of the spiral guide bar 201, the positioning ring 4 can be rotated. While rotating, it moves along the axis of the support sleeve 3. When the positioning ring 4 is rotated to the required height, the pressing block 208 pushes the spring 207 to move, thereby pushing the positioning insert 204 to move. At this time, the ratchet structure at both ends of the spring 207 slides into the ratchet bar 206 in one direction, which locks the exit direction of the positioning insert 204, thereby preventing it from being accidentally loosened. The locking is completed when the positioning insert 204 is pushed into the positioning groove 205, which makes it easy to adapt to rotors of different sizes.

[0046] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the invention applied herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary technical means not disclosed herein. The specification and embodiments are to be considered exemplary only, and the true scope and spirit of this application are indicated by the following claims.

[0047] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, but various modifications can be made without departing from its scope. The scope of this application is limited only by the appended claims.

Claims

1. A rotor air-cooling device, comprising a support frame (1), wherein a column (2) is fixedly mounted on the support frame (1), characterized in that, Also includes: Support sleeve (3), the support sleeve (3) is rotatably mounted on the column (2), and a number of positioning rings (4) are slidably arranged on the support sleeve (3) at intervals along the axial direction. Fan (5), a plurality of fans (5) are provided on the support frame (1), and each fan (5) is set to be independently controlled; The rotor bearing assembly is provided on each of the positioning rings (4) for bearing the rotor to be cooled; The height adjustment component is provided on each of the rotor bearing components. When the positioning ring (4) is adjusted along the axial direction on the support sleeve (3), the relative position between the positioning ring (4) and the support sleeve (3) is fixed. A circumferential locking component is disposed inside the column (2) and is used to fix the relative position between the support sleeve (3) and the column (2) when the relative position between the positioning ring (4) and the support sleeve (3) needs to be adjusted.

2. The rotor air-cooling device according to claim 1, characterized in that, The rotor bearing assembly includes: An annular support frame (101) is provided on each of the positioning rings (4) on an annular support frame (101) and each of the annular support frames (101) is fixedly connected to the positioning rings (4) by a number of connecting rods (102) arranged coaxially at equal angles. Each of the annular support brackets (101) has several partitions (103) fixedly arranged in a circular shape at equal angles.

3. The rotor air-cooling device according to claim 1, characterized in that, The height adjustment component includes: Spiral guide bar (201), the spiral guide bar (201) is coaxially provided on the outside of the support sleeve (3); Guide groove (202): Each of the positioning rings (4) has a guide groove (202) on its inner side, and the guide groove (202) is slidably adapted to the spiral guide bar (201); A height positioning mechanism is provided on each of the positioning rings (4) to fix the relative position between the positioning ring (4) and the support sleeve (3) after adjusting the height position of the positioning ring (4).

4. The rotor air-cooling device according to claim 3, characterized in that, The height positioning mechanism includes: The limiting sliding frame (203) is fixedly provided on each of the positioning rings (4), and the positioning insert (204) is slidably provided inside the limiting sliding frame (203). The limiting component is provided inside each of the limiting sliding frames (203) to fix the relative position of the positioning insert (204) inside the limiting sliding frame (203).

5. A rotor air-cooling device according to claim 4, characterized in that, The support sleeve (3) has several positioning grooves (205) at equal angles around its outer circumference. The positioning grooves (205) are arranged along the axial direction of the support sleeve (3) and are adapted to the positioning insert (204).

6. A rotor air-cooling device according to claim 5, characterized in that, The limiting component includes: Ratchet (206), two ratchet racks (206) are symmetrically and fixedly arranged inside each of the limiting sliding frames (203); A spring (207) is fixedly provided at the tail of each positioning insert (204). The two free ends of each spring (207) are configured as ratchet structures, which are adapted to the corresponding ratchet strip (206).

7. A rotor air-cooling device according to claim 6, characterized in that, Two pressing blocks (208) are symmetrically and fixedly arranged on each of the reeds (207), and the pressing blocks (208) are slidably adapted to the limiting sliding frame (203).

8. A rotor air-cooling device according to claim 1, characterized in that, The circumferential locking component includes: The driving component (301) is fixedly installed inside the column (2). The locking mechanism is provided at the output end of the drive member (301) to fix the relative position between the column (2) and the support sleeve (3).

9. A rotor air-cooling device according to claim 8, characterized in that, The locking mechanism includes: An upper sliding plate (302) and a lower sliding plate (303) are slidably disposed inside the column (2). The bottom of the lower sliding plate (303) is fixedly connected to the output end of the driving member (301). A support spring (304) is fixedly disposed between the upper sliding plate (302) and the lower sliding plate (303). Locking block (305) is fixedly provided on the upper sliding plate (302).

10. A rotor air-cooling device according to claim 9, characterized in that, The bottom of the support sleeve (3) is provided with a number of locking grooves (306) at equal angles in a circular shape, and the locking grooves (306) are adapted to the locking block (305).

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