High-efficiency heat-dissipation full-pack structure brushless motor

Abstract

This invention discloses a highly efficient heat-dissipating, fully enclosed brushless motor, comprising a stator and a rotor. The stator includes a central spindle with a connecting ring fixed on it. A wound iron core is fixed to the outer side of the connecting ring, and multiple winding slots are provided on the outer side of the wound iron core. The spindle is connected to the rotor via bearings. Multiple permanent magnets are fixed to the inner wall of the rotor near the winding slots. The connecting ring consists of an inner connecting ring body and an outer support ring. Annular sealing plates are fixed to both ends of the support ring, forming a sealed cavity between the two sealing plates, the support ring, and the spindle. A blind hole is provided at one end of the spindle, and an air inlet communicating with the cavity is provided at the end of the blind hole. An air outlet communicating with the cavity is provided at the bottom of the winding slots. An air inlet assembly is installed at the outer end of the blind hole, and the air inlet assembly is connected to the rotor. The brushless motor of this invention adopts a fully enclosed structure, resulting in smooth magnetic flux, brushless external rotation, and rapid heat dissipation.

Description

Technical Field

[0001] This invention relates to the field of motor technology, specifically to a fully enclosed brushless motor with high-efficiency heat dissipation. Background Technology

[0002] Brushless motors, by employing electronic commutation instead of traditional mechanical commutators, significantly reduce electrical spark interference and improve motor reliability and efficiency, leading to their widespread application in smart homes, robotics, and other fields. However, heat dissipation is a key factor limiting the performance improvement of brushless motors. Currently, brushless motors primarily rely on their casing for heat dissipation, but the casing's heat dissipation capacity is limited, especially under high loads or continuous operation. Heat is difficult to dissipate effectively, causing the motor temperature to rise and further limiting its performance. Excessive temperature not only affects the efficiency and lifespan of internal components but may also increase the risk of motor failure, posing a significant challenge for applications requiring high performance and stability. Summary of the Invention

[0003] In response to the technical problems raised in the background art, the present invention provides a fully enclosed brushless motor with high-efficiency heat dissipation.

[0004] Technical solution:

[0005] A high-efficiency heat dissipation fully enclosed brushless motor includes a stator and a rotor. The stator includes a central spindle with a connecting ring fixed on it. A winding core is fixed to the outside of the connecting ring, and multiple winding slots are provided on the outside of the winding core. The spindle is connected to the rotor via bearings. Multiple permanent magnets are fixed to the inner wall of the rotor near the winding slots. The connecting ring consists of an inner connecting ring body and an outer support ring. Annular sealing plates are fixed to both ends of the support ring, forming a sealed cavity between the two sealing plates, the support ring, and the spindle. A blind hole is provided at one end of the spindle, and an air inlet is provided at the end of the blind hole, connecting to the cavity. An air outlet is provided at the bottom of the winding slot, connecting to the cavity. An air inlet assembly is installed at the outer end of the blind hole, and the air inlet assembly is connected to the rotor.

[0006] Furthermore, the air intake assembly includes an air intake pipe fixed to the outer end face of the blind hole, a base fixed to the outer end of the air intake pipe, an impeller rotatably connected to the base via a rotating shaft, a connecting housing fixedly connected to the rotating shaft, and one end of the connecting housing fixedly connected to the rotor.

[0007] Furthermore, the rotor includes a front housing, an annular housing, and a rear housing. Both the front housing and the rear housing are connected to the spindle via bearings. The permanent magnet is fixed on the inner wall of the annular housing. The connecting housing is fixed at one end of the rear housing. The front end of the front housing is provided with a connecting part for connecting external equipment.

[0008] Furthermore, wind deflectors are provided on both sides of the connecting ring, the outer rings of the two wind deflectors are connected by a sealing plate, the inner rings of the wind deflectors are fixedly connected to the spindle, the connecting ring body is provided with a through hole, the two wind deflectors are provided with corresponding air holes, an air duct is fixed on the air hole on the front wind deflector, an air guide plate is fixed on the air hole on the rear wind deflector, and a slit is reserved between the air guide plate and the air duct.

[0009] Furthermore, both the front and rear housings are provided with multiple ventilation holes.

[0010] Furthermore, a fixing pin is provided at one end of the spindle extending out of the front housing.

[0011] Beneficial effects:

[0012] This invention provides a highly efficient, fully enclosed brushless motor with excellent heat dissipation. The fully enclosed structure features smooth magnetic flux, external brushless rotation, and rapid heat dissipation. It boasts a specially designed heat dissipation structure. The rotor drives an impeller to rotate, applying air pressure from the center of the spindle. Cool air enters the central chamber and is then blown out from the bottom of each winding slot, dissipating heat from the coils within each slot. Furthermore, the gas is ejected at high speed from near the inner wall of the air duct. According to Bernoulli's principle, the faster the flow velocity, the lower the pressure; therefore, the surrounding air is compressed into the air duct, forming an airflow that further carries away heat, increasing the heat dissipation effect. Since the coils are not exposed, they are effectively protected against dust and humid air from the external environment. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the front structure of the brushless motor of the present invention; Figure 2 This is a schematic diagram of the back structure of the brushless motor of the present invention; Figure 3 This is a schematic diagram of the front structure of the brushless motor of the present invention when the front and rear housings are removed. Figure 4 This is a schematic diagram of the back structure of the brushless motor of the present invention when the front and rear housings are removed; Figure 5 This is a cross-sectional view of the brushless motor of the present invention with the front and rear housings removed. Figure 6 This is a partial structural schematic diagram of the air intake assembly of the present invention; Figure 7 This is a schematic diagram of the structure of the wound iron core of the present invention.

[0014] In the diagram, 1. Mandrel, 2. Connecting ring, 201. Connecting ring body, 202. Support ring, 3. Winding core, 4. Winding groove, 5. Bearing, 6. Permanent magnet, 7. Sealing plate, 8. Blind hole, 9. Air inlet, 10. Air outlet, 11. Air inlet pipe, 12. Base, 13. Rotating shaft, 14. Impeller, 15. Connecting housing, 16. Front housing, 17. Annular housing, 18. Rear housing, 19. Connecting part, 20. Baffle plate, 21. Sealing plate, 22. Air duct, 23. Air guide plate, 24. Ventilation hole, 25. Fixing pin. Detailed Implementation

[0015] The present invention will now be described in detail with reference to the accompanying drawings.

[0016] As attached Figure 1 To be continued Figure 7 As shown.

[0017] Specific embodiment: A high-efficiency heat dissipation fully enclosed brushless motor includes a stator and a rotor. The stator includes a central spindle 1, a connecting ring 2 fixed on the spindle 1, a winding core 3 fixed on the outer side of the connecting ring 2, and multiple winding slots 4 provided on the outer side of the winding core 3. The spindle 1 is connected to the rotor through bearings 5. Multiple permanent magnets 6 are fixed on the inner wall of the rotor near the winding slots 4. The connecting ring 2 consists of an inner connecting ring body 201 and an outer support ring 202. Annular sealing plates 7 are fixed at both ends of the support ring 202. A sealed cavity is formed between the two annular sealing plates 7, the support ring 202, and the spindle 1. A blind hole 8 is provided at one end of the spindle 1. An air inlet 9 communicating with the cavity is provided at the end of the blind hole 8. An air outlet 10 communicating with the cavity is provided at the bottom of the winding slots 4. An air inlet assembly is installed at the outer end of the blind hole 8, and the air inlet assembly is connected to the rotor.

[0018] The air intake assembly includes an air intake pipe 11 fixed on the outer end face of the blind hole 8. A base 12 is fixed to the outer end of the air intake pipe 11. An impeller 14 is rotatably connected to the base 12 via a rotating shaft 13. The rotating shaft 13 is fixedly connected to a connecting housing 15. The connecting housing 15 is fixedly connected to one end of the rotor.

[0019] When the brushless motor is working, the rotor rotates, driving the shaft 13 and impeller 14 to rotate together. External air flows into the sealed cavity through the blind hole 8 and the air inlet 9, and finally flows out from the air outlet 10 at the bottom of each winding slot 4, dissipating heat from the coil wound inside the winding slot 4. Since an air outlet 10 is provided at the bottom of each individual winding slot 4 in this embodiment, this arrangement can better create airflow near the wound coil, thereby achieving rapid heat dissipation.

[0020] In this embodiment, the rotor almost completely encloses the stator structure. The rotor includes a front housing 16, an annular housing 17, and a rear housing 18. Both the front housing 16 and the rear housing 18 are connected to the spindle 1 via bearings 5. The permanent magnet 6 is fixed on the inner wall of the annular housing 17. The connecting housing 15 is fixed to one end of the rear housing 18. The front end of the front housing 16 is provided with a connecting part 19 for connecting external devices.

[0021] To further improve the heat dissipation effect, this embodiment further includes the following structure: baffles 20 are provided on both sides of the connecting ring 2, and the outer rings of the two baffles 20 are connected by a sealing plate 21. It should be noted that the material of the sealing plate 21 should not impede the transmission of magnetic field, otherwise the rotor will not be able to rotate. The inner ring of the baffle 20 is fixedly connected to the spindle 1, so that a sealed chamber is formed between the two baffles 20, the spindle 1 and the sealing plate 21. The connecting ring body 201 is provided with a through hole, and the two baffles 20 are provided with corresponding air holes. A duct 22 is fixed on the air hole on the front baffle 20. The through hole is usually made to be slightly thicker than the duct 22. A guide plate 23 is fixed on the air hole on the rear baffle 20. The guide plate 23 consists of an inner tube and an outer concave shell. The inner tube is inserted into the duct 22 and a slit is reserved between the inner tube and the duct 22. The purpose of setting the guide plate 23 is to change the air outlet direction so that the airflow is ejected at high speed from the inner wall of the duct 22. Both the front housing 16 and the rear housing 18 are provided with multiple ventilation holes 24.

[0022] The gas flowing out of the outlet 10 enters the sealed chamber formed by the two baffles 20, the spindle 1, and the sealing plate 21. Finally, it is ejected at high speed and directionally through the narrow slit between the guide plate 23 and the duct 22. Because the slit is narrow, the amount of gas entering the chamber is less than the amount flowing out, thus increasing the air pressure. After being ejected at high speed and directionally through the slit, a strong airflow is formed. According to Bernoulli's principle, the greater the airflow, the lower the pressure. Therefore, the surrounding gas is forced into the duct 22 by the atmospheric pressure difference, forming an even stronger airflow. Its working principle is similar to that of a bladeless fan. Since the wound iron core 3, the connecting ring 2, and the baffles 20 are all made of metals with high thermal conductivity, the strong airflow formed in the duct 22 can achieve rapid convection heat dissipation.

[0023] A fixing pin 25 is provided at one end of the spindle 1 extending out of the front housing 16 for mounting the brushless motor. The brushless motor of this invention adopts a fully enclosed structure, is small in size, has a commonly used diameter of 125cm, a high speed of up to 20000r / min, a power of 1000w, an efficiency of over 98%, fast heat dissipation, smooth magnetic induction, and low noise.

[0024] Although the present invention has been disclosed above with reference to preferred embodiments, these are not intended to limit the invention. Any person skilled in the art can make various changes or modifications without departing from the spirit and scope of the invention. Therefore, the scope of protection of the present invention should be defined by the scope of the claims of this application.

Claims

1. A fully enclosed brushless motor with high-efficiency heat dissipation, characterized in that, The device includes a stator and a rotor. The stator includes a central spindle with a connecting ring fixed on it. A winding core is fixed to the outside of the connecting ring, and multiple winding slots are provided on the outside of the winding core. The spindle is connected to the rotor via bearings. Multiple permanent magnets are fixed to the inner wall of the rotor near the winding slots. The connecting ring consists of an inner connecting ring body and an outer support ring. Annular sealing plates are fixed to both ends of the support ring, forming a sealed cavity between the two sealing plates, the support ring, and the spindle. One end of the spindle has a blind hole, and the end of the blind hole has an air inlet connecting to the cavity. The bottom of the winding slot has an air outlet connecting to the cavity. An air inlet assembly is installed at the outer end of the blind hole, and the air inlet assembly is connected to the rotor.

2. The fully enclosed brushless motor with high-efficiency heat dissipation structure according to claim 1, characterized in that, The air intake assembly includes an air intake pipe fixed to the outer end face of the blind hole. A base is fixed to the outer end of the air intake pipe. An impeller is rotatably connected to the base via a rotating shaft. The rotating shaft is fixedly connected to the connecting housing. The connecting housing is fixedly connected to one end of the rotor.

3. A fully enclosed brushless motor with high-efficiency heat dissipation according to claim 1 or 2, characterized in that, The rotor includes a front housing, an annular housing, and a rear housing. Both the front housing and the rear housing are connected to the spindle via bearings. The permanent magnet is fixed on the inner wall of the annular housing. The connecting housing is fixed at one end of the rear housing. The front end of the front housing is provided with a connecting part for connecting external equipment.

4. The fully enclosed brushless motor with high-efficiency heat dissipation structure according to claim 3, characterized in that, Wind baffles are provided on both sides of the connecting ring. The outer rings of the two wind baffles are connected by a sealing plate. The inner rings of the wind baffles are fixedly connected to the spindle. The connecting ring body is provided with a through hole. Corresponding air holes are provided on the two wind baffles. An air duct is fixed on the air hole on the front wind baffle. An air guide plate is fixed on the air hole on the rear wind baffle. A slit is reserved between the air guide plate and the air duct.

5. A fully enclosed brushless motor with high-efficiency heat dissipation according to claim 4, characterized in that, Both the front and rear housings are provided with multiple ventilation holes.

6. A fully enclosed brushless motor with high-efficiency heat dissipation according to claim 3, characterized in that, A fixing pin is provided at one end of the mandrel that extends out of the front housing.

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