Inductive variable-frequency brushless direct current motor

Abstract

The invention discloses an inductive variable-frequency brushless direct current motor, which belongs to the technical field of motors and comprises a motor main body, a driving shaft is arranged at the rear end of the motor main body, a heat dissipation opening is formed in the front end surface of the motor main body, and a cleaning mechanism is arranged on the outer surface of the motor main body and comprises a scraping component arranged on the outer surface of the motor main body. The scraping assembly comprises a driving motor fixedly installed on the front end face of the motor body, and a rotating disc is fixedly installed on the outer surface of an output shaft of the driving motor. According to the scheme, the cleaning mechanism is arranged, dust on the outer surface of the motor body and dust on a heat dissipation opening are preliminarily cleaned through the scraping assembly, then, the configured oscillating part assists the scraping assembly to effectively loosen and clean hardened dust, and finally, under the action of the auxiliary part, residual dust is thoroughly removed through blowing. The cleaning of the surface and the heat dissipation opening of the motor is ensured, the cleaning effect is improved through the combined action of the series of steps, and the good working state of the motor is kept.

Description

Technical Field

[0001] The present invention relates to the technical field of motors, and more specifically, to an inductive variable-frequency brushless DC motor. Background Art

[0002] A DC motor is a motor that converts DC electrical energy into mechanical energy. Due to its good speed regulation performance, it is widely used in electric drive. DC motors are divided into three categories according to the excitation method: permanent magnet, separately excited, and self-excited. Among them, self-excitation is further divided into shunt, series, and compound excitation. The working principle of a DC motor is that when a DC power supply supplies power to the armature winding through brushes, the conductors under the N pole on the armature surface can carry current in the same direction. According to the left-hand rule, the conductors will be subjected to a counterclockwise torque. The conductors in the part under the S pole on the armature surface also carry current in the same direction. Similarly, according to the left-hand rule, the conductors will also be subjected to a counterclockwise torque. In this way, the entire armature winding, that is, the rotor, will rotate counterclockwise, and the input DC electrical energy will be converted into mechanical energy output on the rotor shaft.

[0003] Chinese Patent with the authorization publication number CN112436658B discloses a DC motor. By setting a heat dissipation port sealing device, when the motor starts, the control integrated block will control the telescopic rod to extend, and the cylindrical baffle will be slid out by using the slider and the chute. The air holes annularly opened on the side surface of the cylindrical baffle can play a role in heat dissipation, discharging the hot air blown by the fan out of the housing, playing a role in heat dissipation. When the motor is not in use, the control integrated block will control the telescopic rod to shorten, drive the cylindrical baffle to retract through the chute and the slider, and the air holes are blocked, playing a sealing role, solving the problem that the DC motor working in a humid environment or outdoors is prone to water ingress and moisture through the heat dissipation net, causing the motor to short-circuit and burn out. At the same time, in a factory environment, there is more dust in the air, and the dust will enter the motor through the heat dissipation net, resulting in poor heat dissipation and ultimately burning out the motor.

[0004] Although this DC motor solves the problem that in a factory environment, there is more dust in the air, and the dust will enter the motor through the heat dissipation net, resulting in poor heat dissipation and ultimately burning out the motor, in a dust-rich working condition, industrial motors face a two-way attenuation of dust prevention and heat dissipation: Suspended particulate matter generates permeable deposition under the action of a turbulent flow field, forming both an adiabatic dust coating covering the motor housing and causing a decrease in the effective cross-sectional area of the heat dissipation channel through the pore plugging effect. This dual action triggers a non-linear attenuation of the forced convection heat dissipation efficiency, leading to an exponential increase in the winding thermal resistance, and ultimately forming an irreversible thermodynamic imbalance state, causing the core temperature rise of the motor to exceed the material tolerance threshold and resulting in a stepwise deterioration of the equipment life. Summary of the Invention

[0005] Aiming at the problems existing in the prior art, the purpose of the present invention is to provide an inductive variable-frequency brushless DC motor, which can effectively clean the dust on the outer surface of the motor under the working condition of dust enrichment.

[0006] To solve the above problems, the present invention adopts the following technical solutions.

[0007] An inductive variable-frequency brushless DC motor includes a motor main body. A drive shaft is provided at the rear end of the motor main body. A heat dissipation port is provided on the front end face of the motor main body. A cleaning mechanism is provided on the outer surface of the motor main body. The cleaning mechanism includes a scraping component provided on the outer surface of the motor main body. The scraping component includes a drive motor fixedly installed on the front end face of the motor main body. A turntable is fixedly installed on the outer surface of the output shaft of the drive motor. A rotating ring is rotatably connected to the rear end face of the motor main body. A scraping plate is fixedly installed between the rotating ring and the turntable. A first heat dissipation fin is fixedly installed on the outer surface of the motor main body. A fixing rod is fixedly installed on the front end face of the first heat dissipation fin. A guiding tube is fixedly installed at the end of the fixing rod. A first sliding groove is provided on the upper end face of the first heat dissipation fin. A first slider is slidably connected inside the first sliding groove. A first spring is fixedly installed between the first slider and the inner wall of the first sliding groove.

[0008] Preferably, a cleaning brush is fixedly installed on the rear end face of the scraping plate and is arranged close to the heat dissipation port. Multiple groups of scraping plates are provided and are dispersedly arranged in a ring shape.

[0009] Preferably, a pulling rope is slidably connected inside the guiding tube. One end of the pulling rope extends into the first sliding groove and is fixedly connected to the first slider. The other end of the pulling rope is fixedly connected to the outer surface of the rotating ring.

[0010] Preferably, a first transmission ring is sleeved outside the motor main body. The first slider is fixedly connected to the first transmission ring. A first scraping knife is fixedly installed on the inner wall of the first transmission ring. The first scraping knife is arranged in a U shape and is arranged close to the motor main body and the first heat dissipation fin.

[0011] Preferably, the cleaning mechanism further includes an oscillating component arranged in front of the first transmission ring. The oscillating component includes a second transmission ring slidably connected to the front end face of the first transmission ring. A second spring is fixedly installed between the first transmission ring and the second transmission ring.

[0012] A second heat dissipation fin is fixedly installed on the outer surface of the motor main body. A rack is fixedly installed on the upper end face of the second heat dissipation fin. A notch is provided on the front end face of the first transmission ring. A cam is rotatably connected inside the notch. A gear is meshed with the upper side of the rack. The gear is fixedly connected to the cam. The cam is arranged corresponding to the second transmission ring. A second scraping knife is slidably connected to the outer surface of the first scraping knife. The second scraping knife is fixedly connected to the second transmission ring.

[0013] Preferably, the cleaning mechanism further includes an auxiliary member disposed inside the first transmission ring. The auxiliary member includes a third heat dissipation fin fixedly installed on the outer surface of the motor body. A second chute is formed on the upper end surface of the third heat dissipation fin. A second slider is slidably connected inside the second chute. The second slider is fixedly connected to the first transmission ring.

[0014] Preferably, an airbag is fixedly installed between the second slider and the inner wall of the second chute. An air inlet is formed in communication with the airbag on the front end surface of the third heat dissipation fin. A plurality of spray pipes are fixedly installed on the inner wall of the first transmission ring. An air outlet pipe is provided in communication between each of the plurality of spray pipes and the airbag.

[0015] A one-way intake valve is disposed inside the air inlet. A one-way outlet valve is disposed inside the air outlet pipe.

[0016] There are three sets of the first heat dissipation fin, the second heat dissipation fin and the third heat dissipation fin, which are dispersedly arranged in a ring shape, and the first heat dissipation fin, the second heat dissipation fin and the third heat dissipation fin are adjacent to each other in sequence.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0018] (1) In this solution, by setting up the cleaning mechanism, first, the dust on the outer surface of the motor body and the heat dissipation port is preliminarily cleaned by using the scraping assembly. Subsequently, the configured oscillating member assists the scraping assembly to effectively loosen and clean the caked dust. Finally, under the action of the auxiliary member, the residual dust is completely removed by blowing, ensuring the cleanliness of the motor surface and the heat dissipation port. The combined effect of these steps improves the cleaning effect and maintains the good working state of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 is of the present invention Figure 1 magnified schematic diagram at A in;

[0021] Figure 3 is of the present invention Figure 1 magnified schematic diagram at B in;

[0022] Figure 4 is a sectional view of the overall structure of the present invention;

[0023] Figure 5 is of the present invention Figure 4 magnified schematic diagram at C in;

[0024] Figure 6 is of the present invention Figure 4 magnified schematic diagram at D in;

[0025] Figure 7Cross-sectional view of the auxiliary part of the present invention;

[0026] Figure 8 This is the Figure 7 Enlarged schematic view of part E in the present invention.

[0027] Description of the reference numerals in the figure:

[0028] 1. Motor main body; 2. Drive shaft; 3. Heat dissipation port; 4. Drive motor; 5. Turntable; 6. Scraper; 7. Rotating ring; 8. Fixed rod; 9. Guide tube; 10. First chute; 11. First slider; 12. First transmission ring; 13. First scraper; 14. First spring; 15. Pull rope; 16. First heat dissipation fin; 17. Second spring; 18. Rack; 19. Second heat dissipation fin; 20. Gear; 21. Cam; 22. Second transmission ring; 23. Third heat dissipation fin; 24. Second chute; 25. Second slider; 26. Airbag; 27. Air inlet; 28. Outlet pipe; 29. Jet pipe; 30. Notch; 31. Second scraper. Specific implementation manner

[0029] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention; obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0030] Please refer to Figures 1 to 8 , a sensor-enabled variable-frequency brushless DC motor, including a motor main body 1, a drive shaft 2 is provided at the rear end of the motor main body 1, a heat dissipation port 3 is opened on the front end face of the motor main body 1, a cleaning mechanism is provided on the outer surface of the motor main body 1, the cleaning mechanism includes a scraping assembly provided on the outer surface of the motor main body 1, the scraping assembly includes a drive motor 4 fixedly installed on the front end face of the motor main body 1, a turntable 5 is fixedly installed on the outer surface of the output shaft of the drive motor 4, a rotating ring 7 is rotatably connected to the rear end face of the motor main body 1, a scraper 6 is fixedly installed between the rotating ring 7 and the turntable 5, a first heat dissipation fin 16 is fixedly installed on the outer surface of the motor main body 1, a fixed rod 8 is fixedly installed on the front end face of the first heat dissipation fin 16, a guide tube 9 is fixedly installed at the end of the fixed rod 8, a first chute 10 is opened on the upper end face of the first heat dissipation fin 16, a first slider 11 is slidably connected inside the first chute 10, and a first spring 14 is fixedly installed between the first slider 11 and the inner wall of the first chute 10.

[0031] Specifically, a cleaning brush is fixedly installed on the rear end face of the scraper 6 and is arranged close to the heat dissipation port 3. Multiple groups of scrapers 6 are provided and are arranged in a circular and dispersed manner.

[0032] Specifically, a pull rope 15 is slidably connected inside the guiding pipe 9. One end of the pull rope 15 extends into the inside of the first chute 10 and is fixedly connected to the first slider 11, and the other end of the pull rope 15 is fixedly connected to the outer surface of the swivel ring 7.

[0033] Specifically, a first transmission ring 12 is sleeved outside the motor main body 1. The first slider 11 is fixedly connected to the first transmission ring 12. A first scraper 13 is fixedly installed on the inner wall of the first transmission ring 12. The first scraper 13 is arranged in a U shape and is closely attached to the motor main body 1 and the first heat dissipation fins 16.

[0034] First of all, it should be noted that a dust detection device is arranged on one side of the motor main body 1. When it senses that there is a lot of dust on the outer surface of the motor main body 1 and it affects the normal heat dissipation of the motor main body 1, the driving motor 4 can be made to operate. The turntable 5 and the scraper 6 carry the swivel ring 7 to rotate. The rotation of the scraper 6 will scrape and clean the dust on the heat dissipation port 3 through the cleaning brush. The rotation of the swivel ring 7 will pull the first transmission ring 12 to move on the outer surface of the motor main body 1 by compressing the first spring 14 through the pull rope 15. The first transmission ring 12 will carry the first scraper 13 to displace, and scrape the dust and caked dust on the outer surface of the motor main body 1. When the driving motor 4 rotates in reverse, the first spring 14 will elastically deform, so that the first slider 11 slides inside the first chute 10 and drives the first transmission ring 12 to return to its original position, and then pulls the pull rope 15 to return to its original position. Making the driving motor 4 rotate forward again can perform the cleaning operation again.

[0035] Specifically, the cleaning mechanism further includes an oscillating member arranged on the front side of the first transmission ring 12. The oscillating member includes a second transmission ring 22 slidably connected to the front end face of the first transmission ring 12, and a second spring 17 is fixedly installed between the first transmission ring 12 and the second transmission ring 22.

[0036] A second heat dissipation fin 19 is fixedly installed on the outer surface of the motor main body 1. A rack 18 is fixedly installed on the upper end face of the second heat dissipation fin 19. A notch 30 is formed on the front end face of the first transmission ring 12. A cam 21 is rotatably connected inside the notch 30. A gear 20 is meshed with the upper side of the rack 18. The gear 20 is fixedly connected to the cam 21. The cam 21 corresponds to the second transmission ring 22. A second scraper 31 is slidably connected to the outer surface of the first scraper 13. The second scraper 31 is fixedly connected to the second transmission ring 22.

[0037] When the transmission ring 12 moves, it will carry the cam 21 and the gear 20 inside the notch 30 to move. The gear 20 meshes with the gear 20 on the second heat dissipation fin 19. Therefore, the cam 21 will rotate. The rotation of the cam 21 will continuously strike the second transmission ring 22, causing the second transmission ring 22 to slide backward on the outer surface of the first transmission ring 12 and compress the second spring 17. When the cam 21 moves away from the second transmission ring 22, the second spring 17 will elastically deform to restore the second transmission ring 22 to its original position. Repeating this process can make the second transmission ring 22 continuously reciprocate and carry the second scraper to reciprocate. The second scraper 31 is closely arranged with the first scraper 13. The second scraper 31 with high-speed oscillating motion will cooperate with the first scraper 13 to clean the caked dust on the outer surface of the motor main body 1.

[0038] Specifically, the cleaning mechanism further includes an auxiliary part arranged inside the first transmission ring 12. The auxiliary part includes a third heat dissipation fin 23 fixedly installed on the outer surface of the motor main body 1. A second chute 24 is opened on the upper end surface of the third heat dissipation fin 23. A second slider 25 is slidably connected inside the second chute 24. The second slider 25 is fixedly connected with the first transmission ring 12.

[0039] A gasbag 26 is fixedly installed between the second slider 25 and the inner wall of the second chute 24. An air inlet 27 is communicated between the front end surface of the third heat dissipation fin 23 and the gasbag 26. A plurality of spray pipes 29 are fixedly installed on the inner wall of the first transmission ring 12. A plurality of spray pipes 29 are communicated with the gasbag 26 through an air outlet pipe 28.

[0040] A one-way intake valve is arranged inside the air inlet 27, and a one-way outlet valve is arranged inside the air outlet pipe 28.

[0041] The movement of the first transmission ring 12 will carry the second slider 25 to move. The second slider 25 will squeeze the gasbag 26, so that the gas inside the gasbag 26 is sprayed out from the spray pipe 29 through the air outlet pipe 28, assisting the scraping component and the oscillating component to strengthen the cleaning effect on the dust. When the first transmission ring 12 returns to its original position, this will synchronously expand the gasbag 26, so that the gasbag 26 sucks the external gas into the inside of the gasbag 26 through the air inlet 27 for re-operation.

[0042] There are three sets of the first heat dissipation fin 16, the second heat dissipation fin 19 and the third heat dissipation fin 23, which are arranged in a ring-shaped and dispersed manner, and the first heat dissipation fin 16, the second heat dissipation fin 19 and the third heat dissipation fin 23 are arranged adjacent to each other in sequence.

[0043] Under dust enrichment conditions, industrial motors face a two-way decline in dust prevention and heat dissipation efficiency: Suspended particulate matter generates permeable deposition under the action of a turbulent flow field, forming both an adiabatic dust coating layer covering the motor housing and reducing the effective cross-sectional area of the heat dissipation channels through the pore plugging effect. This dual action triggers a non-linear decline in the forced convection heat dissipation efficiency, leading to an exponential increase in the winding thermal resistance, ultimately forming an irreversible thermodynamic imbalance state, causing the core temperature rise of the motor to exceed the material tolerance threshold, and resulting in a stepwise deterioration of the equipment life. Therefore, in this solution, a cleaning mechanism is set up. First, the scraping component is used to preliminarily clean the dust on the outer surface of the motor main body 1 and the heat dissipation port 3. Subsequently, the configured oscillating component assists the scraping component to effectively loosen and clean the caked dust. Finally, under the action of the auxiliary component, the remaining dust is completely removed by blowing, ensuring the cleanliness of the motor surface and the heat dissipation port 3. The combined effect of these steps improves the cleaning effect and maintains the good working state of the motor.

[0044] Usage method: First of all, it should be noted that a dust detection device is provided on one side of the motor main body 1. When it senses that there is a lot of dust on the outer surface of the motor main body 1 and it affects the normal heat dissipation of the motor main body 1, the driving motor 4 can be operated to rotate through the turntable 5 and the scraper 6 carrying the rotating ring 7. The rotation of the scraper 6 will scrape and clean the dust on the heat dissipation port 3 through the cleaning brush. The rotation of the rotating ring 7 will pull the transmission ring one 12 to move on the outer surface of the motor main body 1 by pulling the rope 15 and compressing the spring one 14. The transmission ring one 12 will carry the scraper two 31 to displace and scrape the dust on the outer surface of the motor main body 1 and the caked dust. When the driving motor 4 rotates in reverse, the spring one 14 will elastically deform, causing the slider one 11 to slide inside the chute one 10 and driving the transmission ring one 12 to return to its original position, and then pulling the rope 15 to return to its original position. Rotating the driving motor 4 forward again can perform the cleaning operation again.

[0045] When the transmission ring one 12 displaces, it will carry the cam 21 and the gear 20 inside the notch 30 to displace. The gear 20 meshes with the gear 20 on the heat dissipation fin two 19, so the cam 21 will rotate. The rotation of the cam 21 will continuously strike the transmission ring two 22, causing the transmission ring two 22 to slide backward on the outer surface of the transmission ring one 12 and compress the spring two 17. When the cam 21 moves away from the transmission ring two 22, the spring two 17 will elastically deform to make the transmission ring two 22 return to its original position. Repeating this process can make the transmission ring two 22 continuously perform reciprocating motion and carry the scraper two 31 to perform reciprocating motion. The scraper one 13 and the scraper two 31 are closely arranged, and the high-speed oscillating scraper two 31 will cooperate with the scraper one 13 to clean the caked dust on the outer surface of the motor main body 1.

[0046] Secondly, the displacement of the first transmission ring 12 will drive the second slider 25 to move. The second slider 25 will then squeeze the airbag 26, causing the gas inside the airbag 26 to be ejected from the jet pipe 29 through the air outlet pipe 28, assisting the scraping component and the oscillating component to enhance the cleaning effect on the dust. During the process of the first transmission ring 12 returning to its original position, the airbag 26 will be expanded synchronously, enabling the airbag 26 to suck the external gas into its interior through the air inlet 27 for the next operation.

[0047] The above are only the preferred specific embodiments of the present invention; however, the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its improved concept, making equivalent substitutions or changes, should be covered by the protection scope of the present invention.

Claims

1. A sensor - inductive variable - frequency brushless DC motor, comprising a motor main body (1), and a drive shaft (2) is arranged at the rear end of the motor main body (1), characterized in that: A heat dissipation port (3) is provided on the front end face of the motor main body (1). A cleaning mechanism is arranged on the outer surface of the motor main body (1). The cleaning mechanism includes a scraping assembly arranged on the outer surface of the motor main body (1). The scraping assembly includes a driving motor (4) fixedly installed on the front end face of the motor main body (1). A turntable (5) is fixedly installed on the outer surface of the output shaft of the driving motor (4). A rotating ring (7) is rotatably connected to the rear end face of the motor main body (1). A scraping plate (6) is fixedly installed between the rotating ring (7) and the turntable (5). A first heat dissipation fin (16) is fixedly installed on the outer surface of the motor main body (1). A fixing rod (8) is fixedly installed on the front end face of the first heat dissipation fin (16). A guiding pipe (9) is fixedly installed at the end of the fixing rod (8). A first sliding groove (10) is provided on the upper end face of the first heat dissipation fin (16). A first slider (11) is slidably connected inside the first sliding groove (10). A first spring (14) is fixedly installed between the first slider (11) and the inner wall of the first sliding groove (10).

2. The inductive variable-frequency brushless DC motor according to claim 1, wherein: A cleaning brush is fixedly installed on the rear end face of the scraping plate (6) and is arranged close to the heat dissipation port (3). Multiple groups of the scraping plates (6) are provided and are arranged in a circularly dispersed manner.

3. A sensor - enabled variable - frequency brushless DC motor according to claim 1, characterized in that: A pull rope (15) is slidably connected inside the guiding pipe (9). One end of the pull rope (15) extends into the first sliding groove (10) and is fixedly connected to the first slider (11). The other end of the pull rope (15) is fixedly connected to the outer surface of the rotating ring (7).

4. A kind of inductive variable-frequency brushless DC motor according to claim 1, characterized in that: A first transmission ring (12) is sleeved outside the motor main body (1). The first slider (11) is fixedly connected to the first transmission ring (12). A first scraping knife (13) is fixedly installed on the inner wall of the first transmission ring (12). The first scraping knife (13) is arranged in a U shape and is arranged close to the motor main body (1) and the first heat dissipation fin (16).

5. A sensorable variable-frequency brushless DC motor according to claim 1, characterized in that: The cleaning mechanism further includes an oscillating member arranged on the front side of the first transmission ring (12). The oscillating member includes a second transmission ring (22) slidably connected to the front end face of the first transmission ring (12). A second spring (17) is fixedly installed between the first transmission ring (12) and the second transmission ring (22).

6. A kind of inductive variable-frequency brushless DC motor according to claim 1, characterized in that: A second heat dissipation fin (19) is fixedly installed on the outer surface of the motor main body (1). A rack (18) is fixedly installed on the upper end face of the second heat dissipation fin (19). A notch (30) is provided on the front end face of the first transmission ring (12). A cam (21) is rotatably connected inside the notch (30). A gear (20) is meshed with the upper side of the rack (18). The gear (20) is fixedly connected to the cam (21). The cam (21) is arranged corresponding to the second transmission ring (22). A second scraping knife (31) is slidably connected to the outer surface of the first scraping knife (13). The second scraping knife (31) is fixedly connected to the second transmission ring (22).

7. A kind of inductive variable-frequency brushless DC motor according to claim 4, characterized in that: The cleaning mechanism further includes an auxiliary member disposed inside the first transmission ring (12). The auxiliary member includes a third heat dissipation fin (23) fixedly installed on the outer surface of the motor main body (1). A second chute (24) is formed in the upper end surface of the third heat dissipation fin (23). A second slider (25) is slidably connected inside the second chute (24). The second slider (25) is fixedly connected to the first transmission ring (12).

8. A detectable variable-frequency brushless DC motor according to claim 7, characterized in that: A gasbag (26) is fixedly installed between the second slider (25) and the inner wall of the second chute (24). An air inlet (27) is formed in communication with the front end surface of the third heat dissipation fin (23) and the gasbag (26). A plurality of jet pipes (29) are fixedly installed on the inner wall of the first transmission ring (12). An air outlet pipe (28) is formed in communication between each of the plurality of jet pipes (29) and the gasbag (26).

9. The inductive variable frequency brushless DC motor according to claim 8, wherein: A one-way intake valve is disposed inside the air inlet (27), and a one-way exhaust valve is disposed inside the air outlet pipe (28).

10. A kind of inductive variable-frequency brushless DC motor according to claim 9, characterized in that: There are three sets of the first heat dissipation fin (16), the second heat dissipation fin (19), and the third heat dissipation fin (23), which are dispersedly arranged in a ring shape, and the first heat dissipation fin (16), the second heat dissipation fin (19), and the third heat dissipation fin (23) are adjacent to each other in sequence.

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