High speed turbofan

Abstract

The utility model discloses a high -speed turbine fan, the upper end solid insertion in the inner ring of upper bearing of pivot, the lower end solid insertion in the inner ring of lower bearing of pivot, the rotor iron core solidly sheathed between upper bearing and lower bearing outside pivot, permanent magnet sheet fixed mounting is located in the inner side of stator winding, the upper portion sealed insertion of upper axle hole is equipped with upper sealing sleeve ring, the upper end sealed insertion of pivot is in upper sealing sleeve ring, the lower portion sealed cover of lower axle hole is connected with lower sealing cavity cover, and the lower cold liquid input hole is seted up on the bottom cover or lower sealing cavity cover, and the volute is fixed on the top cover, and the pivot passes through motor mounting hole and is connected with turbine. The high -speed brushless motor of the utility model through the injection of the lubricating grease to the upper and lower cooling cavities, the pivot and two bearings play the cooling effect, still, a small part of lubricating grease is kneaded between the inner and outer rings of bearing, the lubricating property of the lubricating oil in bearing is improved, the motor can match high -speed rotation, and then stronger supercharged wind is produced through turbine and volute.

Description

Technical Field

[0001] This utility model relates to the field of electric motors, and more specifically, to high-speed turbine fans. Background Technology

[0002] Turbine fans equipped with brushless motors are widely used in filtration devices. Ordinary filtration devices only need to meet basic filtration functions, and the suction power of the turbine fan is not excessively required; a typical low-speed brushless motor is sufficient. However, in scenarios with higher environmental requirements, the turbine fan in the filtration device needs higher suction power, thus requiring the brushless motor to have a higher speed. When the brushless motor rotates at high speed, the shaft and bearings generate high temperatures. If the temperature is not effectively reduced, the shaft and bearings will be damaged, significantly reducing the lifespan of the brushless motor. Utility Model Content

[0003] The purpose of this invention is to overcome the above-mentioned defects in the prior art and provide a high-speed turbine fan to solve the above-mentioned technical problems.

[0004] To achieve the above objectives, this utility model provides a high-speed turbine fan, including a high-speed brushless motor, a volute, and a turbine installed within the volute. The high-speed brushless motor includes a motor housing, a plurality of stator windings, and a rotor assembly. The motor housing includes a cylindrical side shell, a bottom cover with a lower shaft hole in the center, and a top cover with an upper shaft hole in the center. The top cover is detachably and securely fastened to the upper edge of the side shell, and the bottom cover is detachably and securely fastened to the lower edge of the side shell. The plurality of stator windings are evenly fixed to the side shell. The inner wall of the rotor assembly includes a shaft, two bearings, a cylindrical rotor core, and several permanent magnet plates. Dust covers are respectively encapsulated at the upper and lower ends of the bearings between their inner and outer rings. The two bearings are an upper bearing and a lower bearing. The upper bearing is fixedly embedded in the lower part of the upper shaft hole, and the lower bearing is fixedly embedded in the upper part of the lower shaft hole. The upper end of the shaft is fixedly inserted through the inner ring of the upper bearing and extends above the top cover. The lower end of the shaft is fixedly inserted into the inner ring of the lower bearing. The rotor core is fixedly sleeved on the... Outside the rotating shaft, between the upper bearing and the lower bearing, the outer wall of the rotor core is evenly provided with several magnetic plate mounting slots. The permanent magnets are fixedly installed in these slots, located inside the stator winding. An upper sealing ring is inserted into the upper part of the upper shaft hole, and the upper end of the rotating shaft is sealed within the upper sealing ring. The upper shaft hole forms an upper cooling cavity between the upper sealing ring, the rotating shaft, and the upper bearing. The side wall of the top cover has a section communicating with the upper cooling cavity. The upper coolant inlet is provided. The lower shaft hole has an integral sealing cover connected to a lower sealing cavity cover. The lower bearing forms a lower cooling cavity between the lower bearing, the rotating shaft, and the lower sealing cavity cover. The bottom cover or the lower sealing cavity cover has a lower coolant inlet. The bottom of the volute has a motor mounting hole. The bottom of the volute is fixed to the top of the top cover. The rotating shaft passes through the motor mounting hole and is fixed to the turbine. The top of the volute has a volute air inlet. The side wall of the volute has a volute air outlet.

[0005] Preferably, the magnetic plate mounting groove extends vertically through the outer side wall of the rotor core, the magnetic plate mounting groove is dovetail-shaped, the bottom wall of the magnetic plate mounting groove is curved outward along the radial direction of the rotor core, the permanent magnet is oriented vertically, the shape and size of the inner wall of the permanent magnet matches the magnetic plate mounting groove, and the shape and size of the two ends of the permanent magnet matches the two ends of the magnetic plate mounting groove.

[0006] Preferably, the permanent magnet sheet gradually becomes thinner from the center of the permanent magnet sheet towards the periphery of the permanent magnet sheet.

[0007] Preferably, the rotor assembly further includes a magnetic sheet retaining ring, wherein the thickness of the permanent magnet sheet is greater than the depth of the magnetic sheet mounting groove, and the magnetic sheet retaining ring is fixedly sleeved outside the permanent magnet sheet and the rotor core.

[0008] Preferably, the rotating shaft is fitted with an upper oil seal on the upper side of the upper bearing or the rotating shaft is fitted with a lower oil seal on the lower side of the lower bearing.

[0009] Preferably, the rotor assembly further includes a shaft pin, an upper retaining ring, and a lower retaining ring. The two inner sidewalls opposite to the center hole of the rotor core are respectively provided with shaft pin slots. The middle part of the rotating shaft is provided with a shaft pin hole that passes through itself along the radial direction of the rotating shaft. The shaft pin is inserted into the shaft pin hole, and the two ends of the shaft pin are respectively inserted into the corresponding shaft pin slots. The upper retaining ring is fixedly sleeved outside the rotating shaft, and the bottom of the upper retaining ring abuts against the top of the rotor core. The lower retaining ring is fixedly sleeved outside the rotating shaft, and the lower retaining ring abuts against the bottom of the rotor core.

[0010] Preferably, the rotating shaft has an upper cooling grid between the upper bearing and the rotor core, and the rotating shaft has a lower cooling grid between the lower bearing and the rotor core.

[0011] Preferably, the volute includes a volute base plate and a volute top cover. The lower edge of the volute top cover is detachably fixed to the periphery of the volute base plate. The motor mounting hole is opened on the volute base plate. The volute air inlet is opened in the middle of the top of the volute top cover. The volute air outlet is opened on the side wall of the volute top cover.

[0012] Preferably, the high-speed turbine fan further includes base plate screws, and the top of the top cover has a retaining plate protruding upward outside the upper bearing. The retaining plate is inserted into the motor mounting hole. The volute base plate has a plurality of base plate mounting through holes evenly distributed outside the motor mounting hole. The top cover has a plurality of mounting screw holes evenly distributed outside the retaining plate. The base plate screws pass through the base plate mounting through holes and are screwed into the mounting screw holes, thereby fixing the volute base plate to the top cover.

[0013] Preferably, the stator winding includes a winding coil, and the high-speed brushless motor further includes a control system. The control system includes a microprocessor, a motor drive circuit, and a motor soft drive. The motor soft drive is equipped with a sliding film observer for detecting the position and speed of the permanent magnet. The motor drive circuit is electrically connected to the winding coil. The motor soft drive transmits control commands to the microprocessor based on the position and speed of the permanent magnet measured by the sliding film observer. The microprocessor executes the control commands to adjust and control the motor drive circuit, thereby adjusting and controlling the current direction and current magnitude of the winding coil.

[0014] Compared with the prior art, the high-speed brushless motor of this utility model not only cools the shaft and two bearings by injecting grease into the upper and lower cooling chambers, but also kneads a small amount of grease between the inner and outer rings of the bearings, thereby improving the lubrication performance of the lubricating oil in the bearings, enabling the motor to match high-speed rotation, and then generating a stronger booster air through the turbine and volute. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is the first angle of the assembly isometric view of this utility model;

[0017] Figure 2 for Figure 1 Explosion-decomposition diagram;

[0018] Figure 3 This is the assembly isometric drawing of the second angle of this utility model;

[0019] Figure 4 This is an exploded view of the high-speed brushless motor of this utility model;

[0020] Figure 5 This is a structural diagram of the rotor assembly of this utility model;

[0021] Figure 6 for Figure 5 Explosion-decomposition diagram;

[0022] Figure 7 This is an exploded view of the stator assembly of this utility model;

[0023] Figure 8 This is a cross-sectional view of the high-speed brushless motor of this utility model;

[0024] Figure 9 This is a schematic diagram of the control system for the high-speed brushless motor of this utility model. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0026] Please refer to Figures 1 to 9 The high-speed turbine fan of this utility model includes a high-speed brushless motor 100, a volute 400, a turbine 500 installed in the volute 400, and base plate screws (not shown).

[0027] The high-speed brushless motor 100 includes a motor housing 10, a stator assembly 20, a rotor assembly 30, and a control system.

[0028] The motor housing 10 includes a cylindrical side shell 11, a bottom cover 12 with a lower shaft hole 121 in the middle, and a top cover 13 with an upper shaft hole 131 in the middle. A retaining plate 132 protrudes upwards from the top of the top cover 13 outside the upper shaft hole 131. A plurality of mounting screw holes 133 are evenly distributed outside the retaining plate 132 on the top cover 13. The top cover 13 is detachably and sealingly secured to the upper edge of the side shell 11, and the bottom cover 12 is detachably and securely secured to the lower edge of the side shell 11. Wiring holes 122 are provided around the periphery of the bottom cover 12.

[0029] The stator assembly 20 includes a plurality of stator windings 21 and a stator core connecting cylinder 22. The stator windings 21 include a stator core 211, a wire frame 212 and a winding coil 213. The stator core connecting cylinder 22 is embedded in the inner side wall of the side shell 11. The outer end of the stator core 211 is perpendicularly fixed to the inner side wall of the stator core connecting cylinder 22. The inner end of the stator core 211 points to the central axis of the side shell 11. The stator core connecting cylinder 22 and the plurality of stator cores 211 form a stator core frame 201. The stator core frame 201 is formed by stacking several silicon steel sheets from top to bottom. The wire frame 212 includes an upper wire frame 2121 and a lower wire frame 2122. The upper wire frame 2121 is wrapped around the upper part of the stator core 211, and the lower wire frame 2122 is wrapped around the lower part of the stator core 211. The winding coil 213 is wound around the upper wire frame 2121 and the lower wire frame 2122. The upper wire frames 2121 of several stator windings 21 are integrally connected to each other, and the lower wire frames 2122 of several stator windings 21 are integrally connected to each other.

[0030] The rotor assembly 30 includes a shaft 31, two bearings 301, a cylindrical rotor core 34, and several permanent magnet plates 35. Dust covers 3011 are encapsulated at both ends of the bearings 301 between their inner and outer rings. The two bearings 301 are an upper bearing 32 and a lower bearing 33. The upper bearing 32 is fixedly embedded in the lower part of the upper shaft hole 131, and the lower bearing 33 is fixedly embedded in the upper part of the lower shaft hole 121. The upper end of the shaft 31 is fixedly inserted through the inner ring of the upper bearing 32 and extends above the top cover 13, while the lower end of the shaft 31 is fixedly inserted into the inner ring of the lower bearing 33. The rotor core 34 is fixedly sleeved outside the shaft 31 between the upper bearing 32 and the lower bearing 33. Several magnet plate mounting slots 341 are evenly provided on the outer wall of the rotor core 34, and the permanent magnet plates 35 are fixedly installed in the magnet plate mounting slots 341. The permanent magnet 35 is located inside the winding coil 213. An upper sealing ring 14 is sealed and inserted into the upper part of the upper shaft hole 131. The upper end of the rotating shaft 31 is sealed and inserted into the upper sealing ring 14. The upper shaft hole 131 forms an upper cooling chamber 101 between the upper sealing ring 14, the rotating shaft 31, and the upper bearing 32. An upper coolant inlet hole 134 communicating with the upper cooling chamber 101 is opened on the side wall of the top cover 13. A lower sealing chamber cover 15 is integrally sealed and connected to the lower shaft hole 121. The lower shaft hole 121 forms a lower cooling chamber 102 between the lower bearing 33, the rotating shaft 31, and the lower sealing chamber cover 15. A lower coolant inlet hole 151 is opened on the lower sealing chamber cover 15. The upper coolant inlet hole 134 is sealed and connected to the upper oil inlet nozzle 135, and the lower coolant inlet hole 151 is sealed and connected to the lower oil inlet nozzle 123. The rotor core 34 is composed of several silicon steel sheets stacked from top to bottom. The upper cooling chamber 101 is injected with grease resistant to 180 degrees Celsius through the upper grease nipple 135, and the lower cooling chamber 102 is injected with grease resistant to 180 degrees Celsius through the lower grease nipple 123.

[0031] Preferably, the magnetic plate mounting groove 341 extends vertically through the outer wall of the rotor core 34. The magnetic plate mounting groove 341 is dovetail-shaped, with its bottom wall curved outwards radially from the rotor core 34. The permanent magnet 35 is oriented vertically, and the shape and size of its inner wall match the magnetic plate mounting groove 341. The shape and size of both ends of the permanent magnet 35 also match the two ends of the magnetic plate mounting groove 341. The permanent magnet 35 gradually thins from its center towards its periphery. This increases the magnetic flux of the permanent magnet 35, enhancing its magnetism and thus its rotational force. An upper cooling grid 311 is provided between the upper bearing 32 and the rotor core 34 on the rotating shaft 31, and a lower cooling grid 312 is provided between the lower bearing 33 and the rotor core 34 on the rotating shaft 31. The rotating shaft 31 has alternating upper and lower cooling grid grooves 314 at the upper cooling grid 311 and the lower cooling grid 312. The upper cooling grid 311 and the lower cooling grid 312 can change the heat transfer path on the rotating shaft 31, thereby reducing the heat transferred from the rotating shaft 31 to the upper bearing 32 and the lower bearing 33, and preventing the upper bearing 32 and the lower bearing 33 from overheating.

[0032] Specifically, the rotor assembly 30 further includes two magnetic sheet retaining rings 36. The thickness of the permanent magnet sheet 35 is greater than or equal to the depth of the magnetic sheet mounting groove 341. The two magnetic sheet retaining rings 36 are alternately fitted around the permanent magnet sheet 35 and the rotor core 34, thereby fixing the permanent magnet sheet 35 within the magnetic sheet mounting groove 341.

[0033] Specifically, the rotor assembly 30 further includes a shaft pin 37, an upper retaining ring 38, a lower retaining ring 39, and an elastic washer 395. The two inner sidewalls opposite to the center hole of the rotor core 34 are respectively provided with shaft pin slots 342. The middle part of the rotating shaft 31 is provided with a shaft pin hole 315 that passes through itself along the radial direction of the rotating shaft 31. The shaft pin 37 is inserted into the shaft pin hole 315, and the two ends of the shaft pin 37 are respectively inserted into the corresponding shaft pin slots 342. The rotating shaft is provided with an upper retaining ring groove 316 and a lower retaining ring groove 317 on the upper and lower sides of the rotor core 34, respectively. The upper retaining ring 38 is sleeved in the upper retaining ring groove 316 and the bottom of the upper retaining ring 38 abuts against the top of the rotor core 34. The lower retaining ring 39 is sleeved in the lower retaining ring groove 317 and is below the rotor core 34. The elastic washer 395 is fixedly sleeved on the rotating shaft 31 between the lower retaining spring 39 and the bottom of the rotor core 34. The lower retaining spring 39 presses against the bottom of the rotor core 34 through the elastic washer 395.

[0034] The high-speed brushless motor also includes a control system, which includes a microprocessor 51, a motor drive circuit 52, and a motor soft drive 53. The motor soft drive 53 is equipped with a sliding film observer 531 for detecting the position and speed of the permanent magnet 35. The motor drive circuit 52 is electrically connected to the winding coil 213. The motor soft drive 53 transmits control commands to the microprocessor 51 based on the position and speed of the permanent magnet 35 measured by the sliding film observer 531. The microprocessor 51 executes the control commands to adjust and control the motor drive circuit 52, thereby adjusting and controlling the current direction and current magnitude of the winding coil 213, thereby controlling the speed of the rotating shaft 31 to adjust towards a specified value.

[0035] The volute 400 includes a volute base plate 410 and a volute top cover 420. The lower edge of the volute top cover 410 is detachably fixed to the periphery of the volute base plate 410. The volute base plate 410 has a motor mounting hole 411. The volute top cover 420 has a volute air inlet 421 in the middle of its top. The volute top cover 420 has a volute air outlet 422 on its side wall. The inner side wall of the top of the volute top cover 420 has several alternating inner and outer wind baffle rings 423 protruding downwards outside the volute air inlet 421. The mounting bracket 132 is inserted into the motor mounting hole 411. The volute base plate 410 has several evenly spaced mounting through holes 412 outside the motor mounting hole 411. The base plate screws pass through the mounting through holes 412 and are screwed into the mounting screw holes 133, thereby fixing the volute base plate 410 to the top cover 13. The upper end of the rotating shaft 31 passes through the motor mounting hole 411 and is fixedly connected to the turbine 500. In this embodiment, both the motor mounting hole 411 and the mounting bracket 132 are circular. The number of base plate screws, mounting through holes 412, and mounting screw holes 133 are all four.

[0036] In use, the high-speed brushless motor 100 injects grease resistant to 180 degrees Celsius into the upper cooling chamber 101 through the upper grease nipple 135, and injects grease resistant to 180 degrees Celsius into the lower cooling chamber 102 through the lower grease nipple 123. A connecting cable 40 is installed on the wiring hole 122. The poles of the winding coils 213 of several stator windings 21 are encapsulated within the connecting cable 40 and connected to the motor drive circuit cable. The motor soft drive 53 transmits control commands to the microprocessor 51 based on the position and speed of the permanent magnet 35 measured by the sliding diaphragm observer 531. The microprocessor 51 executes the control commands to adjust and control the motor drive circuit 52, thereby adjusting and controlling the current direction and magnitude of the winding coils 213, thus controlling the rotation speed of the shaft 31 to a specified value, ultimately driving the turbine 500 to rotate and generate pressurized air. When this invention is used upside down, during the rotation of the shaft 31, the grease in the lower cooling chamber 102 cools the shaft 31 and the lower bearing 33. Simultaneously, under the high-speed rotation of the shaft 31 and gravity, a small portion of the grease in the lower cooling chamber 102 is pushed downwards into the lubricating oil between the inner and outer rings of the lower bearing 33, improving the lubrication of the lubricating oil in the lower bearing 33 (during high-speed rotation, the lubricating oil in the bearing is prone to carbonization due to high temperature, resulting in a decrease in lubrication effect). Meanwhile, an upper oil seal (not shown) is fitted on the upper side of the upper bearing 32. In addition to cooling the shaft 31 and the upper bearing 33, the grease in the upper cooling chamber 101, under the combined action of the high-speed rotation of the shaft 31 and the upper oil seal, is pushed upwards into the lubricating oil between the inner and outer rings of the upper bearing 32, improving the lubrication of the lubricating oil in the upper bearing 32. When this utility model is used upright, the rotating shaft 31 is fitted with a lower oil seal (not shown in the figure) on the lower side of the lower bearing 33. During the rotation of the shaft 31, the grease in the upper cooling chamber 101 cools the shaft 31 and the upper bearing 32. Simultaneously, under the high-speed rotation of the shaft 31 and gravity, a small portion of the grease in the upper cooling chamber 101 is pushed downwards into the lubricating oil between the inner and outer rings of the upper bearing 32, improving the lubrication of the lubricating oil in the upper bearing 33. Meanwhile, a lower oil seal (not shown) is fitted onto the lower side of the lower bearing 33. In addition to cooling the shaft 31 and the lower bearing 33, the grease in the lower cooling chamber 102, under the combined action of the high-speed rotation of the shaft 31 and the lower oil seal, is pushed upwards into the lubricating oil between the inner and outer rings of the lower bearing 33, improving the lubrication of the lubricating oil in the upper bearing 33.

[0037] This invention relates to a high-speed brushless motor that injects grease into the upper and lower cooling chambers to cool the shaft and two bearings. In addition, it can also knead a small amount of grease between the inner and outer rings of the bearings, thereby improving the lubrication performance of the lubricating oil in the bearings. This allows the motor to match high-speed rotation and then generate a stronger booster airflow through the turbine and volute.

[0038] The above embodiments are preferred embodiments of the present utility model, but the embodiments of the present utility model are not limited to the above embodiments. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of the present utility model shall be considered equivalent substitutions and shall be included within the protection scope of the present utility model.

Claims

1. A high-speed turbine fan, characterized in that: The system includes a high-speed brushless motor, a volute housing, and a turbine installed within the volute housing. The high-speed brushless motor comprises a motor housing, a plurality of stator windings, and a rotor assembly. The motor housing includes a cylindrical side shell, a bottom cover with a lower shaft hole in the center, and a top cover with an upper shaft hole in the center. The top cover is detachably and securely fastened to the upper edge of the side shell, and the bottom cover is detachably and securely fastened to the lower edge of the side shell. The plurality of stator windings are evenly fixed to the inner wall of the side shell. The rotor assembly includes a rotating shaft and two shafts. The system comprises a cylindrical rotor core and several permanent magnet plates. Dust covers are respectively installed at the upper and lower ends of the bearing between the inner and outer rings. The bearings are an upper bearing and a lower bearing. The upper bearing is fixedly embedded in the lower part of the upper shaft hole, and the lower bearing is fixedly embedded in the upper part of the lower shaft hole. The upper end of the rotating shaft is fixedly inserted through the inner ring of the upper bearing and extends above the top cover. The lower end of the rotating shaft is fixedly inserted into the inner ring of the lower bearing. The rotor core is fixedly sleeved outside the rotating shaft between the upper bearing and the lower bearing. Between the lower bearings, a plurality of magnetic plate mounting slots are evenly provided on the outer side wall of the rotor core. The permanent magnets are fixedly installed in the magnetic plate mounting slots and are located on the inner side of the stator winding. An upper sealing ring is sealed and inserted into the upper part of the upper shaft hole, and the upper end of the rotating shaft is sealed and inserted into the upper sealing ring. The upper shaft hole forms an upper cooling cavity between the upper sealing ring, the rotating shaft, and the upper bearing. An upper coolant inlet hole communicating with the upper cooling cavity is provided on the side wall of the top cover. The lower shaft hole has an integral sealing cover connected to a lower sealing cavity cover. The lower bearing forms a lower cooling cavity between the lower bearing, the rotating shaft, and the lower sealing cavity cover. The bottom cover or the lower sealing cavity cover has a lower coolant inlet hole. The bottom of the volute has a motor mounting hole. The bottom of the volute is fixed to the top of the top cover, and the rotating shaft passes through the motor mounting hole and is fixed to the turbine. The top of the volute has a volute air inlet, and the side wall of the volute has a volute air outlet.

2. The high-speed turbine fan according to claim 1, characterized in that: The magnetic plate mounting slot extends vertically through the outer wall of the rotor core. The magnetic plate mounting slot is dovetail-shaped, and the bottom wall of the magnetic plate mounting slot is curved outward along the radial direction of the rotor core. The permanent magnet is oriented vertically, and the shape and size of the inner wall of the permanent magnet matches the magnetic plate mounting slot. The shape and size of the two ends of the permanent magnet also match the two ends of the magnetic plate mounting slot.

3. The high-speed turbine fan according to claim 2, characterized in that: The permanent magnet sheet gradually becomes thinner from the center towards the periphery.

4. The high-speed turbine fan according to claim 3, characterized in that: The rotor assembly also includes a magnetic sheet retaining ring, wherein the thickness of the permanent magnet sheet is greater than the depth of the magnetic sheet mounting groove, and the magnetic sheet retaining ring is fixedly sleeved outside the permanent magnet sheet and the rotor core.

5. The high-speed turbine fan according to claim 1, characterized in that: The rotating shaft is fitted with an upper oil seal on the upper side of the upper bearing, or the rotating shaft is fitted with a lower oil seal on the lower side of the lower bearing.

6. The high-speed turbine fan according to claim 1, characterized in that: The rotor assembly also includes a shaft pin, an upper retaining ring, and a lower retaining ring. The two inner sidewalls opposite to the center hole of the rotor core are respectively provided with shaft pin slots. The middle part of the rotating shaft is provided with a shaft pin hole that passes through itself along the radial direction of the rotating shaft. The shaft pin is inserted into the shaft pin hole, and the two ends of the shaft pin are respectively inserted into the corresponding shaft pin slots. The upper retaining ring is fixedly sleeved outside the rotating shaft, and the bottom of the upper retaining ring abuts against the top of the rotor core. The lower retaining ring is fixedly sleeved outside the rotating shaft, and the lower retaining ring abuts against the bottom of the rotor core.

7. The high-speed turbine fan according to claim 1, characterized in that: The rotating shaft has an upper cooling grid between the upper bearing and the rotor core, and a lower cooling grid between the lower bearing and the rotor core.

8. The high-speed turbine fan according to claim 1, characterized in that: The volute includes a volute base plate and a volute top cover. The lower edge of the volute top cover is detachably fixed to the periphery of the volute base plate. The motor mounting hole is opened on the volute base plate. The volute air inlet is opened in the middle of the top of the volute top cover. The volute air outlet is opened on the side wall of the volute top cover.

9. The high-speed turbine fan according to claim 8, characterized in that: It also includes base plate screws. The top of the top cover has a retaining plate protruding upwards from the upper bearing. The retaining plate is inserted into the motor mounting hole. The volute base plate has several base plate mounting through holes evenly distributed outside the motor mounting hole. The top cover has several mounting screw holes evenly distributed outside the retaining plate. The base plate screws pass through the base plate mounting through holes and are screwed into the mounting screw holes, thereby fixing the volute base plate to the top cover.

10. The high-speed turbine fan according to claim 1, characterized in that: The stator winding includes a winding coil, and the high-speed brushless motor also includes a control system. The control system includes a microprocessor, a motor drive circuit, and a motor soft drive. The motor soft drive is equipped with a sliding diaphragm observer for detecting the position and speed of the permanent magnet. The motor drive circuit is electrically connected to the winding coil. The motor soft drive transmits control commands to the microprocessor based on the position and speed of the permanent magnet measured by the sliding diaphragm observer. The microprocessor executes the control commands to adjust and control the motor drive circuit, thereby adjusting and controlling the current direction and current magnitude of the winding coil.

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