Wind path structure for high-voltage compact motor

Abstract

The invention relates to a wind path structure for a high-voltage compact motor, belongs to the technical field of motors, and solves the technical problem that an existing high-power-density motor is poor in ventilation and heat dissipation capability. According to the solution, the wind path structure for the high-voltage compact motor comprises a base, an outer wind path is formed outside the base, and an inner wind path is formed in an inner cavity of the base; the four groups of motor base ventilating ducts are uniformly distributed on the outer surface of the motor base, and cooling assemblies are arranged in the motor base ventilating ducts; a rotating shaft; a fan cover; an outer fan; a rotor; a stator; an air gap is formed between the stator and the rotor; the centrifugal fan sleeves the outer side of the rotating shaft and is positioned between the rotor and the rear end cover; the flow dividing assembly is used for dividing the inner air path into a first inner air path and a second inner air path; and the converging assembly is used for converging the first inner air path and the second inner air path into the centrifugal fan. Compared with the prior art, the motor base has the advantages of improving ventilation and heat dissipation performance inside and outside the motor base, prolonging the service life and the like.

Description

Technical Field

[0001] The invention belongs to the technical field of motors, and in particular relates to an air duct structure for a high-voltage compact motor. Background Art

[0002] High power density motors have higher magnetic field density, can achieve higher output power and efficiency, and have a more compact structure. The implementation of energy-saving and low-carbon policies has made the application of high-efficiency, high power density motors more and more widespread.

[0003] Compared with box-type high-voltage motors, compact high-voltage motors with cylindrical shapes are widely used in large industrial scenarios such as fans, water pumps, and crushers because of their compact body and small size, and the market demand is increasing. In the traditional high-voltage compact motor structure, due to the limitation of the base space, radial ventilation ducts are often used to improve the ventilation and heat dissipation performance of the rotor. In the process of realizing high-power density motors, the temperature rise of the motor is still difficult to meet the actual needs. Excessive winding temperature rise accelerates insulation aging, causing motor short circuit, partial burning of the winding, and excessive bearing temperature rise causes bearing damage. Summary of the invention

[0004] In order to overcome the deficiencies of the prior art and solve technical problems such as poor ventilation and heat dissipation capabilities of existing high-power density motors, the present invention provides an air duct structure for a high-voltage compact motor.

[0005] The present invention is achieved through the following technical solutions.

[0006] The present invention provides an air duct structure for a high-voltage compact motor, comprising:

[0007] A machine base, wherein two ends of the machine base are respectively connected to a front cover and a rear cover, an outer portion of the machine base forms an outer air path, and an inner cavity of the machine base forms an inner air path;

[0008] The machine base ventilation ducts, 4 groups of machine base ventilation ducts are evenly distributed on the outer surface of the machine base, the machine base ventilation ducts are connected with the inner cavity of the machine base, and cooling components are arranged in the machine base ventilation ducts;

[0009] A rotating shaft, the rotating shaft is arranged in the middle of the inner cavity of the base;

[0010] A wind shield, which is arranged outside the rear end cover;

[0011] An external fan, the external fan is sleeved on the outside of the rotating shaft and is located in a cavity formed by the rear end cover and the wind shield;

[0012] A rotor, the rotor is located in the inner cavity of the base and sleeved on the outer side of the rotating shaft, and the rotor is provided with a rotor axial ventilation passage;

[0013] The stator is located in the inner cavity of the base and sleeved on the outer side of the rotor, an air gap is provided between the stator and the rotor, and a stator coil is provided on the stator and extends out of the end of the stator;

[0014] A centrifugal fan, wherein the centrifugal fan is sleeved on the outer side of the rotating shaft and located between the rotor and the rear end cover;

[0015] A flow splitter assembly, the flow splitter assembly is sleeved on the outer side of the rotating shaft and is located between the front end cover and the rotor, and the flow splitter assembly is used to divide the inner air path into a first inner air path and a second inner air path;

[0016] The merging component is sleeved on the outer side of the rotating shaft and located between the rotor and the centrifugal fan. The merging component is used to merge the first inner air path and the second inner air path into the centrifugal fan.

[0017] Furthermore, a plurality of mounting through holes are provided at both ends of the base ventilation duct, one end of the base ventilation duct is connected to the wind cover, a first through hole is provided on the inner wall of the base ventilation duct near the front end cover, and a second through hole is provided on the inner wall of the base ventilation duct near the rear end cover.

[0018] Furthermore, the cooling assembly includes a plurality of air-cooling pipes, and the plurality of air-cooling pipes are respectively arranged at the installation through holes.

[0019] Furthermore, a wind shield lining is provided in the wind shield.

[0020] Furthermore, the air outlet of the centrifugal fan faces the second through hole.

[0021] Furthermore, the height dimension of the diverter component is smaller than the height dimension of the air gap.

[0022] Furthermore, the diversion assembly includes an air guide ring, one end of which is connected to the rotor, and the air guide ring includes a disc portion and a horn portion arranged on one side of the disc portion, a first rotating shaft mounting hole is provided at the center of the disc portion, and a plurality of first air guide holes are evenly distributed on the disc portion between the first rotating shaft mounting hole and the outer wall.

[0023] Furthermore, the confluence assembly includes an air guide tube, one end of which is connected to the rotor, and the other end of which is connected to the centrifugal fan, the air guide tube includes an inner disc portion and an outer disc portion, a second shaft mounting hole is also provided at the center of the inner disc portion, a plurality of second air guide holes are evenly distributed on the inner disc portion between the second shaft mounting hole and the outer side wall, and a plurality of third air guide holes are evenly distributed on the outer disc portion.

[0024] Furthermore, the external air path is that the wind blown out from the external fan outlet enters the air cooling pipe from the base ventilation duct near the installation hole of the wind cover under the guidance of the wind cover lining ring, and is blown out from the other end of the air cooling pipe.

[0025] Furthermore, the first internal air path is that the wind blown out from the inside of the centrifugal fan when it rotates enters the machine base ventilation duct through the second through hole, enters the inner cavity of the machine base from the first through hole, enters the air gap under the guidance of the air guide ring, and then returns to the centrifugal fan from the third air guide hole; the second internal air path is that the wind blown out from the inside of the centrifugal fan when it rotates enters the machine base ventilation duct through the second through hole, enters the inner cavity of the machine base from the first through hole, passes through the rotor axial ventilation duct from the first air guide hole under the guidance of the air guide ring, and finally returns to the centrifugal fan from the second air guide hole.

[0026] The beneficial effects achieved by the present invention are as follows: the present invention uses a cooling component, and the arrangement of the cooling component, i.e., a plurality of air-cooling pipes, in the machine base ventilation duct greatly improves the heat dissipation capacity of the machine base ventilation duct, thereby dissipating the heat on the outer surface of the machine base. The arrangement of the air-cooling pipes enables the outer air path and the inner air path of the machine base to complete heat exchange, thereby improving the heat dissipation performance of the motor; the use of a shunt component, i.e., an air guide ring, can divide the inner air path of the machine base into a first inner air path and a second inner air path. In addition, the height dimension of the shunt component is smaller than the height dimension of the air gap, thereby ensuring that the first inner air path enters the air gap to cool the air gap of the rotating joint surface of the stator and the rotor, thereby improving the heat dissipation performance inside the machine base, improving the heat dissipation performance at the air gap, and improving the life of the motor.

[0027] Compared with the prior art, the present invention has the advantages of improving the ventilation and heat dissipation performance inside and outside the motor base, extending the service life, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the structure of the present invention;

[0029] Figure 2 It is a three-dimensional structural schematic diagram of the present invention;

[0030] Figure 3 It is a schematic diagram of the three-dimensional structure of the machine base ventilation duct of the present invention;

[0031] Figure 4 It is a three-dimensional structural schematic diagram of the machine base ventilation duct of the present invention from another angle;

[0032] Figure 5 It is a structural schematic diagram of the air guide lining ring of the present invention;

[0033] Figure 6 It is a structural schematic diagram of the air guide tube of the present invention;

[0034] Figure 7 is an air flow diagram of the external air duct of the present invention;

[0035] Figure 8 It is an air flow diagram of the inner air path of the present invention.

[0036] In the figure: 1. base; 2. front end cover; 3. rear end cover; 4. base ventilation duct; 5. cooling assembly; 6. rotating shaft; 7. wind cover; 8. external fan; 9. rotor; 10. rotor axial ventilation duct; 11. stator; 12. air gap; 13. stator coil; 14. centrifugal fan; 15. diverter assembly; 16. confluence assembly; 17. mounting through hole; 18. first through hole; 19. second through hole; 20. air cooling pipe; 21. wind cover lining; 22. air guide lining; 23. disc; 24. horn; 25. first rotating shaft mounting hole; 26. first air guide hole; 27. air guide cylinder; 28. inner disc; 29. ​​outer disc; 30. second rotating shaft mounting hole; 31. second air guide hole; 32. third air guide hole. DETAILED DESCRIPTION

[0037] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0038] like Figures 1 to 8 As shown, a wind path structure for a high-voltage compact motor includes:

[0039] The base 1 plays a protective and supporting role. The two ends of the base 1 are respectively connected to the front cover 2 and the rear cover 3. The outside of the base 1 forms an external air path, and the inner cavity of the base 1 forms an internal air path. The external air path and the internal air path respectively ventilate and dissipate heat for the outer surface of the base 1 and the inner cavity of the base 1;

[0040] The base ventilation duct 4, 4 groups of base ventilation ducts 4 are evenly distributed on the outer surface of the base 1, and the base ventilation duct 4 and the heat dissipation ribs on the surface of the base 1 play a role in cooling the outer surface of the base 1 together. The base ventilation duct 4 is connected to the inner cavity of the base 1, and a plurality of mounting through holes 17 are provided at both ends of the base ventilation duct 4. One end of the base ventilation duct 4 is connected to the wind cover 7, so that the wind inside the wind cover 7 will enter the base ventilation duct 4 and will not blow to the outside of the base 1; the inner wall of the base ventilation duct 4 is provided with a first through hole 18 near the front end cover 2, so that the wind on the inner wall of the base ventilation duct 4 can enter the inner cavity of the base 1 from the first through hole 18, and the inner wall of the base ventilation duct 4 is close to the rear end cover 3. A second through hole 19 is provided, so that the wind in the inner cavity of the base 1 can enter the base ventilation duct 4 from the second through hole 19; a cooling component 5 is provided in the base ventilation duct 4, and the cooling component 5 is mainly used to dissipate heat from the outer surface of the base 1 to improve the heat dissipation performance. The cooling component 5 includes a plurality of air cooling pipes 20. In this embodiment, 8 air cooling pipes 20 are provided, and the 8 air cooling pipes 20 are respectively arranged at the installation through holes 17. The arrangement of the 8 air cooling pipes 20 greatly improves the heat dissipation capacity of the base ventilation duct 4, and dissipates heat from the outer surface of the base 1 together with the heat dissipation ribs. The arrangement of the air cooling pipes 20 enables the outer air path and the inner air path of the base 1 to complete heat exchange here, thereby improving the heat dissipation performance of the motor;

[0041] A rotating shaft 6, wherein the rotating shaft 6 is arranged in the middle of the inner cavity of the base 1;

[0042] The wind hood 7 is arranged outside the rear end cover 3. The wind hood 7 plays the role of isolating the external environment and protecting the motor. The wind from the air outlet of the external fan 8 can be gathered inside the wind hood 7. The wind hood 7 is provided with a wind hood liner 21. The setting of the wind hood liner 21 can guide the wind blown out of the air outlet of the external fan 8 in the wind hood 7 and quickly enter the air cooling pipe 20;

[0043] An external fan 8, which is sleeved on the outside of the rotating shaft 6 and is located in a cavity formed by the rear end cover 3 and the wind shield 7, and the external fan 8 is mainly used to provide cold air to dissipate heat from the motor;

[0044] A rotor 9, wherein the rotor 9 is located in the inner cavity of the base 1 and sleeved on the outer side of the rotating shaft 6, and a rotor axial ventilation passage 10 is provided on the rotor 9;

[0045] The stator 11 is located in the inner cavity of the motor base 1 and is sleeved on the outer side of the rotor 9. An air gap 12 is provided between the stator 11 and the rotor 9. A large part of the heat generated in the inner cavity of the motor base 1 comes from the air gap 12. Currently, there is little cooling and heat dissipation of the air gap 12. The stator 11 is provided with a stator coil 13 extending out of the end of the stator 11.

[0046] The centrifugal fan 14 rotates to form negative pressure when the motor is working, and the wind is blown out from the centrifugal fan 14. The centrifugal fan 14 is sleeved on the outside of the rotating shaft 6 and is located between the rotor 9 and the rear end cover 3. The air outlet of the centrifugal fan 14 is directly opposite to the second through hole 19. This arrangement can ensure that the wind blown out by the centrifugal fan 14 quickly enters the machine base ventilation duct 4 from the second through hole 19 to complete heat exchange under the action of the low temperature of the air cooling pipe 20;

[0047] The shunt component 15 is sleeved on the outside of the rotating shaft 6 and is located between the front end cover 2 and the rotor 9. The shunt component 15 is used to divide the internal wind path into a first internal wind path and a second internal wind path. The height dimension of the shunt component 15 is smaller than the height dimension of the air gap 12, so that it can be ensured that the first internal wind path enters the air gap 12 to cool the air gap 12 of the rotating joint surface of the stator 11 and the rotor 9. Because most of the heat inside the base 1 comes from the air gap 12, the setting of the shunt component 15 can greatly improve the heat dissipation performance inside the base 1, improve the heat dissipation performance at the air gap 12, and improve the life of the motor; the shunt component 15 includes an air guide ring 22, one end of which is connected to the rotor 9 is connected, so that it can be ensured that the first inner air path and the second inner air path will not cross, the air guide lining 22 includes a disc portion 23 and a horn portion 24 arranged on one side of the disc portion 23, and the arrangement of the horn portion 24 can make the wind coming in from the first through hole 18 enter the air gap 12 along the shape of the horn portion 24 and the arrangement of the disc portion 23, so as to ventilate and dissipate the air gap 12 and improve the heat dissipation performance of the air gap 12; a first shaft mounting hole 25 is arranged at the center of the disc portion 23, and a plurality of first air guide holes 26 are evenly distributed on the disc portion 23 between the first shaft mounting hole 25 and the outer wall, and the wind of the second inner air path enters the rotor axial ventilation channel 10 from the first air guide hole 26 to dissipate the heat of the rotor 9;

[0048] The confluence component 16 is sleeved on the outer side of the rotating shaft 6 and is located between the rotor 9 and the centrifugal fan 14. The confluence component 16 is used to merge the first inner wind path and the second inner wind path into the centrifugal fan 14; the confluence component 16 includes an air guide 27, one end of which is connected to the rotor 9, so that it can be ensured that the first inner wind path and the second inner wind path do not cross, and the other end of the air guide 27 is connected to the centrifugal fan 14, so that it can be ensured that the wind blowing through the air guide 27 will not be blown into other places of the base 1 from between the air guide 27 and the centrifugal fan 14; the air guide 27 includes an inner The inner disc portion 28 and the outer disc portion 29 are each provided with a second shaft mounting hole 30 at the center of the inner disc portion 28. A plurality of second air guide holes 31 are evenly distributed on the inner disc portion 28 between the second shaft mounting hole 30 and the outer side wall. The second air guide holes 31 are arranged so that the wind from the rotor axial ventilation duct 10 in the second inner air path can return to the centrifugal fan 14 along the second air guide holes 31. The outer disc portion 29 is evenly distributed with a plurality of third air guide holes 32. The third air guide holes 32 are arranged so that the wind from the air gap 12 in the first inner air path can return to the centrifugal fan 14 along the third air guide holes 32.

[0049] The external air path is that the wind blown out from the air outlet of the external fan 8 enters the air cooling pipe 20 from the mounting through hole 17 of the machine base ventilation duct 4 close to the air cover 7 under the guidance of the air cover lining ring 21, and is blown out from the other end of the air cooling pipe 20, thus realizing ventilation and heat dissipation of the outer surface of the machine base 1 together with the heat dissipation ribs.

[0050] The first internal air path is the wind blown out from the inside of the centrifugal fan 14 when it rotates, and enters the base ventilation duct 4 through the second through hole 19, and enters the inner cavity of the base 1 from the first through hole 18. The wind entering the base ventilation duct 4 completes heat exchange under the action of the extremely low temperature of the air-cooling pipe 20, enters the air gap 12 under the guidance of the air guide ring 22, and then returns to the centrifugal fan 14 from the third air guide hole 32; the second internal air path is the wind blown out from the inside of the centrifugal fan 14 when it rotates, and enters the base ventilation duct 4 through the second through hole 19, and enters the inner cavity of the base 1 from the first through hole 18. Under the guidance of the air guide ring 22, it passes through the rotor axial ventilation duct 10 from the first air guide hole 26 and finally returns to the centrifugal fan 14 from the second air guide hole 31, thereby finally realizing ventilation and heat dissipation of the inner cavity of the base 1, improving the heat dissipation performance at the air gap 12, and improving the service life of the motor.

[0051] The above describes in detail the implementation modes of the present invention in conjunction with the accompanying drawings, but the present invention is not limited to the above implementation modes. The implementation modes can still be changed within the knowledge scope of ordinary technicians in the field. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A wind duct structure for a high-voltage compact motor, characterized in that: include: A machine base (1), wherein two ends of the machine base (1) are respectively connected to a front cover (2) and a rear cover (3), an outer portion of the machine base (1) forms an outer air path, and an inner cavity of the machine base (1) forms an inner air path; A machine base ventilation duct (4), wherein four groups of machine base ventilation ducts (4) are evenly distributed on the outer surface of the machine base (1), the machine base ventilation duct (4) is communicated with the inner cavity of the machine base (1), and a cooling component (5) is arranged in the machine base ventilation duct (4); A rotating shaft (6), wherein the rotating shaft (6) is arranged in the middle of the inner cavity of the machine base (1); A wind hood (7), wherein the wind hood (7) is arranged outside the rear end cover (3); An external fan (8), wherein the external fan (8) is sleeved on the outside of the rotating shaft (6) and is located in a cavity formed by the rear end cover (3) and the wind shield (7); A rotor (9), the rotor (9) being located in the inner cavity of the machine base (1) and sleeved on the outer side of the rotating shaft (6), and the rotor (9) being provided with a rotor axial ventilation passage (10); A stator (11), the stator (11) is located in the inner cavity of the machine base (1) and is sleeved on the outer side of the rotor (9), an air gap (12) is provided between the stator (11) and the rotor (9), and a stator coil (13) is provided on the stator (11) and extends out of the end of the stator (11); A centrifugal fan (14), wherein the centrifugal fan (14) is sleeved on the outside of the rotating shaft (6) and is located between the rotor (9) and the rear end cover (3); A flow splitter assembly (15), the flow splitter assembly (15) being sleeved on the outside of the rotating shaft (6) and located between the front end cover (2) and the rotor (9), the flow splitter assembly (15) being used to split the inner air path into a first inner air path and a second inner air path; A merging component (16) is sleeved on the outside of the rotating shaft (6) and is located between the rotor (9) and the centrifugal fan (14). The merging component (16) is used to merge the first inner air path and the second inner air path into the centrifugal fan (14).

2. The air duct structure for a high-voltage compact motor according to claim 1, characterized in that: A plurality of mounting through holes (17) are provided at both ends of the machine base ventilation duct (4); one end of the machine base ventilation duct (4) is connected to the wind cover (7); a first through hole (18) is provided on the inner wall of the machine base ventilation duct (4) near the front end cover (2); and a second through hole (19) is provided on the inner wall of the machine base ventilation duct (4) near the rear end cover (3).

3. The air duct structure for a high-voltage compact motor according to claim 2, characterized in that: The cooling assembly (5) comprises a plurality of air cooling pipes (20), and the plurality of air cooling pipes (20) are respectively arranged at the installation through holes (17).

4. The air duct structure for a high-voltage compact motor according to claim 3, characterized in that: A wind shield lining ring (21) is arranged inside the wind shield (7).

5. The air duct structure for a high-voltage compact motor according to claim 4, characterized in that: The air outlet of the centrifugal fan (14) faces the second through hole (19).

6. The air duct structure for a high-voltage compact motor according to claim 5, characterized in that: The height dimension of the flow dividing component (15) is smaller than the height dimension of the air gap (12).

7. The air duct structure for a high-voltage compact motor according to claim 6, characterized in that: The flow diversion assembly (15) comprises an air guide ring (22), one end of which is connected to the rotor (9), the air guide ring (22) comprises a disc portion (23) and a horn portion (24) arranged on one side of the disc portion (23), a first rotating shaft mounting hole (25) is arranged at the center of the disc portion (23), and a plurality of first air guide holes (26) are evenly distributed on the disc portion (23) between the first rotating shaft mounting hole (25) and the outer wall.

8. The air duct structure for a high-voltage compact motor according to claim 7, characterized in that: The confluence assembly (16) comprises an air guide tube (27), one end of the air guide tube (27) is connected to the rotor (9), and the other end of the air guide tube (27) is connected to the centrifugal fan (14), the air guide tube (27) comprises an inner disc portion (28) and an outer disc portion (29), a second rotating shaft mounting hole (30) is also provided at the center of the inner disc portion (28), a plurality of second air guide holes (31) are evenly distributed on the inner disc portion (28) between the second rotating shaft mounting hole (30) and the outer side wall, and a plurality of third air guide holes (32) are evenly distributed on the outer disc portion (29).

9. The air duct structure for a high-voltage compact motor according to claim 8, characterized in that: The external air path is the air blown out of the air outlet of the external fan (8), which enters the air cooling pipe (20) from the mounting through hole (17) of the machine base ventilation duct (4) close to the air cover (7) under the guidance of the air cover lining ring (21), and is blown out from the other end of the air cooling pipe (20).

10. The air duct structure for a high-voltage compact motor according to claim 9, characterized in that: The first internal air path is when the centrifugal fan (14) rotates, and the wind blown out from the inside enters the machine base ventilation duct (4) through the second through hole (19), enters the inner cavity of the machine base (1) from the first through hole (18), enters the air gap (12) under the guidance of the air guide ring (22), and then returns to the centrifugal fan (14) from the third air guide hole (32); the second internal air path is when the centrifugal fan (14) rotates, and the wind blown out from the inside enters the machine base ventilation duct (4) through the second through hole (19), enters the inner cavity of the machine base (1) from the first through hole (18), and under the guidance of the air guide ring (22), passes through the rotor axial ventilation duct (10) from the first air guide hole (26) and finally returns to the centrifugal fan (14) from the second air guide hole (31).

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