Ultra-high-speed airflow and exhaust brushless motor

Abstract

This invention relates to an ultra-high-speed blower / exhaust brushless motor that improves heat dissipation, reduces noise, and ensures sufficient air output from the motor. [Solution] The ultra-high-speed exhaust brushless motor touches upon various technical aspects of ultra-high-speed exhaust system motors. These include casings, stator assemblies, rotor assemblies, impellers, and circuit boards.

Description

Technical Field

[0001] The present invention relates to the technical field of ultra-high-speed motors for various ventilation and exhaust systems, and specifically relates to an ultra-high-speed ventilation and exhaust brushless motor of about 120,000 rpm.

Background Art

[0002] A brushless motor is a motor without brushes and a director (or slip ring), and operates by alternately switching the frequency change and waveform conversion of the current waveform of the pivot winding coil. Brushless motors are widely adopted by major manufacturers due to their advantages such as high efficiency, low energy consumption, low noise, ultra-long life, high reliability, servo control, stepless frequency conversion speed adjustment, relatively low cost and ease of use.

[0003] In related technologies, a brushless motor mainly includes a stator coil component, a rotor component, and an integrally formed motor housing. The motor housing is provided with a hollow internal cavity, and the stator coil component and the motor housing are coaxially installed and penetrate through the hollow internal cavity. The rotor assembly is arranged inside the stator coil component and is equipped with bearing support forms integrally formed at both ends of the motor housing. There are heat dissipation windows on both sides of the bearing support form at the rear end of the motor housing, and both ends of the rotor assembly component are fixed to the bearing brackets at both ends of the motor housing through bearings.

[0004] When using brushless motors in related technologies, the circuit board must be mounted on a bearing bracket at the rear end of the motor housing and pins connected in order to achieve electrical connection between the stator coil assembly and the circuit board. Due to the obstruction of the circuit board, air expelled from inside the motor housing blows towards the circuit board, generating return air and noise, thus affecting the motor's air output. At the same time, because the bearing bracket and motor housing are integrally formed, the assembly process of the stator coil assembly, rotor components, and motor housing is relatively complex and inefficient when assembling the motor. [Overview of the project] [Problems that the invention aims to solve]

[0005] The object of the present invention is to solve the problem that, with current brushless motor technology, air inside the motor casing blows towards the circuit board, generating return air and noise, which affects the motor's air output. Because the bearing support frame and motor casing are integrally formed, the assembly process of the stator coil assembly, rotor assembly, and motor housing becomes complex and assembly efficiency is low when assembling the motor. The present invention provides an ultra-high-speed brushless motor with ultra-high-speed air supply and exhaust. [Means for solving the problem]

[0006] The technical solution employed by the present invention is a modularly designed high-speed brushless motor, specifically comprising a casing (comprising a coaxially arranged cover and a fixed cylinder, with an intake port and a vent port at both ends of the cover), a stator assembly (installed within the cover and coaxially arranged with the fixed cylinder, including a stator rear bracket, a stator coil at the rear of the stator assembly bracket, and a rear bee cap for the stator rear bearing integrally formed with the rear of the stator assembly bracket), one end of the stator rear bracket positioned within the fixed cylinder, the other end of the stator rear bracket protruding from the fixed cylinder, and the stator rear bearing seat positioned at the end of the stator rear bracket that protrudes from the fixed cylinder. The stator rear bracket has heat dissipation ports on both sides of the end closest to the stator rear bearing seat. The rotor assembly (inserted inside the stator roll of the stator assembly, containing the rotor shaft, a permanent magnet sleeve mounted in the center of the rotor shaft, and first and second bearings positioned at both ends of the rotor shaft), the rotor rotation shaft is positioned coaxially with the stator rear bracket, one end of the rotor rotation shaft is fixedly connected to one end of a fixed cylinder near the air inlet via the first bearing, and the other end of the rotor rotation shaft is fixed inside the stator rear bearing seat via the second bearing. The impeller (rotation is installed at one end of the air inlet of the barrel, and one end of the rotor shaft is fixedly connected to the impeller via the first bearing, thereby rotating the impeller), the circuit board is located on the stator rear bearing seat, is electrically connected to the stator coil and is used to supply power to the stator coil so that the stator coil generates a magnetic field. A protective tube is located on the stator rear bracket and is used to close the heat dissipation vents.

[0007] Multiple connecting boards are evenly distributed within the casing along its longitudinal direction and evenly distributed along its periphery. Both sides of these connecting boards are fixedly connected to the inner wall of the casing and the outside of the fixed cylinder, respectively, to achieve connection and fixation between the fixed cylinder and the casing. The hollow chamber is divided into several ventilation chambers under the action of the multiple connecting plates.

[0008] The outer surface of the stator rear racket is in close contact with the inner wall of the fixed cylinder, which allows the heat generated by the stator coil to be quickly transferred to the fixed cylinder and then blown away by the airflow from the vents.

[0009] Multiple air inlet holes are evenly distributed at one end of the fixed cylinder facing the air inlet. These air inlet holes are evenly distributed along the periphery of the fixed cylinder, and all of them are connected to the inside of the fixed cylinder. Multiple air inlet holes are provided at the end of the fixed cylinder so that the wind generated by the rotation of the impeller blows into the inside of the fixed cylinder.

[0010] Multiple pins are provided on the circuit board side of the stator coil, and these pins are arranged along the longitudinal direction of the stator coil. The circuit board has numerous through-holes. There is a one-to-one correspondence between the numerous through-holes and the pins, and the stator coil and the circuit board are electrically connected by welding the pins to the circuit board through the through-holes.

[0011] The circuit board is provided with multiple heat dissipation ports, all of which penetrate the circuit board. The heat dissipation ports are located at the edges of the circuit board, and the heat dissipation ports are evenly distributed along the circuit board in the periphery direction.

[0012] The rotor assembly includes a limiting ring positioned on the rotor shaft and a spring between the limiting ring and the second bearing. The limiting ring is fixedly mounted to the end of the rotor shaft near the second bearing. The spring is wound around the outside of the rotor shaft, with both ends of the spring fixedly connected to the limiting ring and the opposite sides of the second bearing, respectively.

[0013] The fixed cylinder and stator end cover are provided with a first bearing groove and a second bearing groove, respectively, and the first and second bearing grooves are positioned opposite each other. The first and second bearing grooves are then provided to secure the first and second bearings, respectively. [Effects of the Invention]

[0014] After adopting the above technical solutions, the beneficial effects of the present invention are as follows: When using the ultra-high-speed brushless motor of the present invention, power is supplied to the stator coil via a circuit board. This supplies a magnetic field to the stator coil, causing the rotor component to rotate at high speed within the stator coil and rotate the impeller. The impeller then blows air toward a fixed cylinder inside the casing. In other words, air is drawn in from the air inlet of the casing and discharged from the air outlet to achieve airflow output. At the same time, heat is dissipated from inside the casing, and the heat dissipation port is sealed with a protective cover, causing the air blown out from the exhaust port to be discharged along the outside of the protective cover. In this way, the air blown in from the impeller is drawn in through the heat dissipation port and an intake is formed on the circuit board, reducing noise generation and ensuring sufficient air output. At the same time, this application involves modular production of the stator component, rotor component, and casing. By assembling the stator component, rotor component, and casing separately, and then integrating them into a single production unit, the production process efficiency is improved, which is beneficial for motor production and promotion.

[0015] In this invention, the arrangement of through-holes and heat dissipation ports allows air generated by the impeller to pass through the through-holes and into the stator rear bracket, where the heat generated by the stator coil is blown into the heat dissipation ports for discharge. Simultaneously, the tight seal between the stator rear bracket and the fixed cylinder allows the heat generated by the stator coil to be quickly transferred to the fixed cylinder, and then reduced by the airflow from the impeller through the ventilation holes. This ensures constant heat dissipation of the stator coil, resulting in a better heat dissipation effect. [Brief explanation of the drawing]

[0016] To more clearly illustrate embodiments of the present invention or prior art solutions, the drawings necessary for describing the embodiments or the current technology are briefly presented below. However, the following explanatory drawings represent only some embodiments of the present invention, and ordinary technicians in the industry can obtain other drawings based on these without any creative effort. [Figure 1] Figure 1 is a model diagram showing the overall configuration of this embodiment. [Figure 2] Figure 2 shows the exhibit from a different angle. [Figure 3] Figure 3 is an exploded view of this embodiment. [Figure 4] Figure 4 is a display diagram of the casing. [Figure 5] Figure 5 is a diagram of the stator assembly. [Figure 6] Figure 6 is a diagram of the rotor assembly. [Figure 7] Figure 7 is a diagram of the circuit board layout. Embodiment of the Invention

[0017] Embodiments of the present invention will be described in more detail below with reference to the examples shown in Figures 1 to 7. [Example 1]

[0018] The specific embodiments of the present invention are merely illustrative and not intended to limit the invention. However, those skilled in the art may modify these embodiments as needed after reading this specification. All rights to the present invention are protected by patent law.

[0019] This embodiment relates to an ultra-high-speed intake and exhaust brushless motor rotating at 120,000 rmp. Referring to FIGS. 1 and 3 and combined with FIG. 2, it includes a casing 1, a stator assembly 2, a rotor assembly 3, a circuit board 4 and an impeller 5. Among these, the stator assembly 2 is installed in the casing 1, the rotor assembly 3 is installed in the stator assembly 2, and the circuit board 4 is electrically connected to the stator assembly 2. The impeller 5 is rotatably installed in the casing 1, and one end of the rotor assembly 3 passes through the stator assembly 2 and is fixedly connected to the impeller 5. Its main operating process is to supply power to the stator assembly 2 through the circuit board 4, and the stator assembly 2 generates a magnetic field, thereby rotating the rotor assembly 3 at high speed within the stator assembly 2. At the same time, by rotationally driving the impeller 5, the impeller 5 can blow air into the casing 1.

[0020] As shown in FIGS. 3 and 4, the casing 1 includes a casing 11 arranged coaxially and a fixed cylinder 12. The casing 11 is arranged in a cylindrical shape with both ends open. One end of the casing 11 serves as an air inlet 13, and the other end of the casing 11 is an air outlet 14. The closed end of the fixed cylinder 12 is arranged inside the casing 11. The opening of the fixed cylinder 12 and the exhaust outlet 14 of the casing 11 are at the same level, and a ventilation pipeline is formed between the casing 11 and the fixed cylinder 12.

[0021] On the inner wall of the casing 11, a plurality of connecting boards 15 are evenly arranged. The plurality of connecting boards 15 are arranged along the length direction of the casing 11. The plurality of connecting boards 15 are evenly arranged along the peripheral direction of the casing 11. Both the upper and lower sides of the plurality of connecting boards 15 are fixedly connected to the inner wall of the casing 11 and the outside of the fixed cylinder 12, realizing the connection and fixation between the fixed cylinder 12 and the casing 11. The ventilation pipeline is divided into a plurality of ventilation slots 16 by the action of the plurality of connecting boards 15. In the actual manufacturing process, it is necessary to integrally injection-mold the housing 11, the fixed cylinder 12, and the connecting board 15.

[0022] Referring to FIGS. 3 and 5, the stator assembly 2 is installed in the fixed cylinder 12. The stator assembly 2 includes a stator rear bracket 21 arranged coaxially with the fixed cylinder 12, a stator coil 22 arranged in the stator rear bracket 21, and a stator rear bearing sheet 23 integrally injection-molded with the stator rear bracket 21. One end of the stator rear bracket 21 is installed inside the fixed cylinder 12, and the other end extends to the outside of the fixed cylinder. The stator bearing sheet 23 is installed at one end outside the fixed cylinder 12 extending from the stator rear bracket 21. For the sake of heat dissipation inside the stator rear bracket 21 for convenience, heat dissipation ports 24 are provided on both sides of one end of the stator rear bracket 21 close to the stator rear bearing sheet 23.

[0023] Furthermore, since the outer wall of the stator rear bracket 21 is firmly pressed against the inner wall of the fixed cylinder 12, the heat generated by the stator coil 22 is quickly transmitted to the fixed cylinder 12 and then blown away by the wind in the ventilation pipeline by the impeller 5, improving the heat dissipation effect of the motor.

[0024] Furthermore, multiple air intake holes 121 are evenly spaced at one end of the fixed cylinder 12 on the exhaust port 14 side (the closed end of the fixed cylinder 12). These air intake holes 121 are evenly distributed in the direction of the periphery of the fixed cylinder 12. This is because all of the air intake holes 121 are connected to the inside of the fixed cylinder, and because multiple air intake holes 121 are located around the fixed cylinder 12, the wind generated by the 5 rotations of the impeller blows into the inside of the fixed cylinder 12. In this way, the heat generated by the stator coil 22 can be blown into the heat dissipation port 24 inside the fixed cylinder 12, improving the heat dissipation effect of the stator coil 22.

[0025] As shown in Figures 3 and 6, the rotor assembly 3 is located within the stator coil 22 and includes a rotor shaft 31, a permanent magnet 32 ​​mounted on the outer center of the rotor shaft 31, and a first bearing 33 and a second bearing 34 provided at both ends of the rotor shaft 31. Of these, the roll shaft 31 is located coaxially with the stator mounting shaft, and one end of the rotor shaft 31 is fixedly connected via the first bearing 33 to the end of the fixed cylinder 12 near the air inlet 13. The other end of the rotor shaft 31 is fixedly connected via the second bearing 34 to the stator rear bearing seat 23.

[0026] The rotor assembly 3 also includes a limiting ring 35 mounted on the rotor shaft 31 and a spring 36 provided between the limiting ring 35 and the second bearing 34. The limiting ring 35 is fixedly mounted to one end of the rotor shaft 31 closest to the second bearing 34. The spring 36 is wound around the outside of the rotor shaft 31, and both ends of the spring 36 are fixedly connected to the limiting ring 35 and the opposing ends of the second bearing 34, respectively.

[0027] Furthermore, referring to Figures 4 and 5, in order to achieve stable assembly of the rotor assembly 3 and to allow the rotor shaft 31 to rotate stably within the stator coil 22, the fixing cylinder 12 and the stator cover are provided with a first bearing 122 and a second bearing 231, respectively. The first bearing groove 122 and the second bearing groove 231 are positioned opposite each other and are used to secure the first bearing 33 and the second bearing 34.

[0028] Referring to Figures 5 and 7, the circuit board is fixedly installed on the side of the stator rear bracket 12 opposite to the stator rear bearing seat 23. The stator coil 22 has a plurality of pins 221 on the side facing the circuit board 4. The plurality of pins 221 are arranged along the longitudinal direction of the stator coil 22, and the circuit board 4 has a plurality of through holes 41. Each of the multiple through holes 41 corresponds to a pin 221. The pins 221 are then welded to the circuit board 4 through the through holes 41, thereby achieving an electrical connection between the stator coil 22 and the circuit board 4.

[0029] The impeller 5 is located at the air inlet 13 of the housing 11, and the rotation of the impeller 5 is mounted at the closed end of the fixed cylinder 12. One end of the rotor shaft 31 passes through the first bearing 33 and through the closed end of the fixed cylinder 12, and is fixedly connected to the impeller 5.

[0030] Furthermore, referring to Figure 1, in order to prevent the air blown by the rotation of the impeller 5 from blowing out of the heat dissipation port 24 onto the circuit board 4 and forming a return air, a protective tube 6 is provided on the stator rear bracket 21 to close the heat dissipation port 24. The protective tube 6 is installed on the stator rear bracket 21, and its surface is connected to the fixed cylinder 12 at the same level as the fixed cylinder 12. The protective tube 6 is located away from the inner wall of one end of the fixed cylinder 12 and is connected to the outside of the circuit board 4.

[0031] Furthermore, referring to Figures 3 and 7, the circuit board is provided with multiple heat dissipation slots 42, all of which penetrate the circuit board 4. The multiple heat dissipation slots 42 are located at the edges of the circuit board 4. Moreover, the multiple heat dissipation slots 42 are evenly distributed along the periphery of the circuit board 4. By providing multiple heat dissipation slots 42, the air blown from the impeller 5 into the fixed cylinder 12 is discharged into the heat dissipation slots 42 generated by the stator coil 22, and the heat dissipation opening 24 is closed by the protective tube 6, preventing the heat from the stator coil 22 from accumulating inside the fixed cylinder 12. Thus, the heat dissipation effect is improved.

[0032] The operating principle of the present invention is broadly as follows. During assembly, first the stator assembly 2 and rotor shaft 3 are assembled separately to form a modular assembly, and then the stator assembly 2 and rotor shaft 3 are sequentially installed inside the casing. This modular assembly of the motor improves motor efficiency. During use, power is supplied to the stator coil 22 via the circuit board 4, energizing the stator coil 22 and generating a magnetic field. The rotor shaft 31 rotates stably at high speed within the stator coil 22, simultaneously driving the impeller 5 to rotate, meaning the impeller 5 can stably exhaust air. A portion of the air blown by the impeller 5 is blown into the fixed cylinder 12 through the air inlet hole. The air blown into the fixed cylinder 12 discharges the heat generated by the stator coil 22 to the heat dissipation slot 42. This enables heat dissipation from the stator coil 22.

[0033] A portion of the blown air is generated by the impeller 5 and blown into the blower pipe. At this time, the heat generated by the stator coil 22 is transferred to the outer wall of the fixed cylinder 12 and then expelled to the exhaust port 14 by the blown air in the blower pipe. This ensures that the motor's heat dissipation effect is reliably guaranteed by the heat dissipation of the stator coil 22. Simultaneously, by closing the heat dissipation port 24 with a protective cover, the blown air generated from the impeller 5 cannot be blown back from the heat dissipation port 24 to the circuit board 4 and generate return air, thereby reducing noise. Furthermore, the motor's air output is ensured.

[0034] The foregoing is used solely to illustrate, but not to limit, the technical solutions of the present invention. Any other modifications or equivalent substitutions made by the general art in the art to the technical solutions of the present invention shall also be within the scope of the claims of the present invention, provided that they do not deviate from the spirit and scope of the technical solutions of the present invention. [Explanation of symbols]

[0035] 1. Casing 11. Cover 12. Fixed cylinder 121. Air inlet hole 122. First Beering Groove 13.Ventilation 14.Exhaust port 15. Connecting board 16. Ventilation slots 2. Stator Assembly 21. Stator rear bracket 22. Stator coil 221. Pin 23. Stator rear bearing seat 231. Second Beering Groove 24. Heat dissipation port 3. Rotor Assembly 31. Rotor shaft 32. Permanent magnets 33. First bearing 34. Second bearing 35. Restriction Ring 36. Spring 4. Circuit board 41. Through-hole 42. Heat dissipation boat 5. Impeller 6.Protective TUBE

Claims

1. It is an ultra-high-speed blowing and exhaust brushless motor, The casing (1) includes a coaxially arranged cover (11) and a fixed cylinder (12), with an air inlet (13) and an air outlet (14) at both ends of the cover (11), and a ventilation opening formed between the cover (11) and the fixed cylinder (12). The stator assembly (2) is installed inside the casing (1) and includes a stator rear bracket (21) positioned coaxially with the fixed cylinder (12), a stator coil (22) mounted inside the stator rear bracket (21), and a stator bee cap (23) integrally formed with the stator assembly rear bracket (21). One end of the stator rear bracket (21) is installed inside the fixed cylinder (12), and the other end of the stator rear bracket (21) extends from the fixed cylinder (12). The stator bee cap (23) is positioned at one end of the stator assembly rear bracket (21) that extends outside the fixed cylinder. The stator assembly rear bracket (21) has heat dissipation ports (24) on both sides of the end closest to the stator rear bee cap (23). The rotor assembly (3) is inserted into the stator coil (22), and the rotor shaft (31), the permanent magnet (32) in the center of the rotor shaft (31), the first bearing (33) and the second bearing (34) provided at both ends of the rotor shaft (31), and the rotor shaft (31) are arranged coaxially with the stator rear bracket (21). One end of the rotor shaft (31) is connected to the fixed cylinder (12) at the end closest to the ventilation opening (13) via the first bearing (33), and the other end of the rotor shaft (31) is connected to the inside of the stator rear bee cap (23) via the second bearing (34). The impeller (5) is attached to one end of a stationary cylinder (12) whose rotation faces the intake port (13), and one end of the rotor shaft (31) is fixedly connected to the impeller (5) by passing through the first bearing (33) to drive the impeller (5). The circuit board (4) is positioned on the rear stator bee cap (23) and electrically connected to the stator coil (22), which is used to supply power to the stator coil (22) so that the stator coil (22) generates a magnetic field, and a protective tube (6) is installed on the rear stator bracket (21) to seal the heat dissipation port (24). A brushless motor with ultra-high-speed airflow and exhaust functions.

2. Multiple connection boards (15) are evenly distributed within the cover (11), and all of these connection boards (15) are arranged along the length of the cover (1). The multiple connection boards (15) are evenly distributed in the periphery direction of the cover. Both sides of the multiple connection boards (15) are fixedly connected to the inner wall of the cover (1) and the outside of the fixing cylinder (12), respectively, thereby achieving connection and fixing between the fixing cylinder (12) and the cover (1). Furthermore, the ventilation opening is divided into multiple ventilation slots (16) by the action of multiple connecting boards (15). The ultra-high-speed blowing and exhaust brushless motor according to feature 1.

3. The outer wall of the rear stator bracket (21) is in close contact with the inner wall of the fixing cylinder (12). The heat generated by the stator coil (22) is rapidly transferred to the fixed cylinder (12) and then blown away by the air in the ventilation slot (16). The ultra-high-speed blowing and exhaust brushless motor according to feature 2.

4. One end (13) of the fixed cylinder facing the air inlet (13) has multiple air inlet holes (121) evenly spaced therein. Several air inlet holes (121) are evenly distributed along the periphery of the fixed cylinder (12), and several air inlet holes (121) are all connected to the inside of the fixed cylinder (12). Several air inlet holes (121) are all located around the fixed cylinder (12), so that (5) the air generated by the rotation of the impeller can be blown into the inside of the fixed cylinder (12). The ultra-high-speed blowing and exhaust brushless motor according to claim 1.

5. Multiple PIN pins (221) are provided on one side of the stator coil (22) that faces the circuit board (4). Multiple PIN pins (221) are arranged along the longitudinal direction of the stator coil (22). The circuit board (4) has numerous through-holes (41), each corresponding to a PIN pin (221). The PIN pins (221) pass through the through-holes (41) and are welded to the circuit board (4), thereby establishing an electrical connection between the stator coil (22) and the circuit board (4). The ultra-high-speed blowing and exhaust brushless motor according to claim 1.

6. Multiple heat seeks (42) are provided around the periphery of the circuit board (4), and these multiple heat seeks (42) are evenly distributed along the peripheral direction (4) of the circuit board. The ultra-high-speed blowing and exhaust brushless motor according to claim 1.

7. The rotor assembly (3) includes a limit ring (35) provided on the rotor shaft (31), and a spring (36) between the limit ring (35) and the second bearing (34). The limit ring (35) is located close to one end of the rotor shaft near the second bearing (34), and the spring (36) is wrapped around the outside of the rotor shaft (31). Both ends of the spring (36) are fixedly connected to the limit ring (35) and the second bearing (34) on opposite sides. The ultra-high-speed blowing and exhaust brushless motor according to claim 1.

8. The fixed cylinder (12) and the stator rear bee cap (23) are provided with a first bearing groove (122) and a second bearing groove (231), respectively. The first baring groove (122) and the second baring groove (231) are arranged opposite each other. The first bearing groove (122) and the second bearing groove (231) are used to mount and secure the first bearing (33) and the second bearing (34), respectively. The ultra-high-speed blowing and exhaust brushless motor according to claim 1.

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