CN219554763U - Double-cooling system of permanent magnet synchronous motor - Google Patents
Double-cooling system of permanent magnet synchronous motor Download PDFInfo
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- CN219554763U CN219554763U CN202320603796.4U CN202320603796U CN219554763U CN 219554763 U CN219554763 U CN 219554763U CN 202320603796 U CN202320603796 U CN 202320603796U CN 219554763 U CN219554763 U CN 219554763U
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Abstract
The utility model relates to the technical field of motor heat dissipation, in particular to a double-cooling system of a permanent magnet synchronous motor. The water retaining device comprises an outer water jacket and an inner water jacket, wherein the inner water jacket is arranged in an inner cavity of the outer water jacket, a gap is reserved between the inner surface of the outer water jacket and the outer surface of the inner water jacket, water retaining rings are respectively arranged at two ends of the inner water jacket, the outer ring surface of the water retaining rings protrudes out of the outer surface of the inner water jacket and is in sealing connection with the inner surface of the outer water jacket, and a cooling water cavity is formed among the inner water jacket, the outer water jacket and the water retaining rings; the outer surface of the inner water jacket is provided with water-proof ribs, and two ends of each water-proof rib are respectively and hermetically connected with water-proof rings at two ends of the inner water jacket. According to the utility model, the cooling water cavity formed by the inner water jacket and the outer water jacket is arranged on the outer surface of the stator, so that heat on the side of the stator can be taken away in time through cooling water for heat dissipation, and the cooling effect of the motor is improved; the air cooling structure is arranged on the surface of the water cooling structure, and cooling water in the water cooling structure can take away heat in the air cooling structure, so that the heat dissipation effect of the air cooling structure is further improved.
Description
Technical Field
The utility model relates to the technical field of motor heat dissipation, in particular to a double-cooling system of a permanent magnet synchronous motor.
Background
With the development of the compressor industry, the performance of the driving motor for the compressor is gradually improved, namely indexes such as power and rotating speed of the motor are gradually improved, but high power and high rotating speed can cause the motor to generate larger heat, so that the service life of the motor is shortened, and the heat dissipation efficiency of the motor is improved to improve the power density and the service life of the motor.
The improvement of the heat dissipation efficiency of the motor is an important research direction in the technical field of motors, and the water cooling of the shell is a main cooling mode of the motor, wherein a shell water channel is in direct contact with a motor stator, so that the heat exchange with the motor stator side is realized, but the heat exchange on the rotor side and the bearing cooling cannot be realized, and the further improvement of the power density of the motor is restricted.
Disclosure of Invention
Aiming at the defects in the prior art, the utility model provides a double cooling system of a permanent magnet synchronous motor, wherein a water cooling and air cooling double cooling structure is arranged on the outer surface of the motor, and the water cooling structure and the air cooling structure can form mutual influence, so that the heat dissipation effect of the rotor side in the motor is greatly improved, and the power density and the service life of the motor can be improved.
The technical scheme adopted by the utility model is as follows:
the double cooling system of the permanent magnet synchronous motor comprises an outer water jacket and an inner water jacket, wherein the inner water jacket is arranged in an inner cavity of the outer water jacket, a gap is reserved between the inner surface of the outer water jacket and the outer surface of the inner water jacket, water retaining rings are respectively arranged at two ends of the inner water jacket, the outer ring surface of each water retaining ring protrudes out of the outer surface of the inner water jacket and is in sealing connection with the inner surface of the outer water jacket, and a cooling water cavity is formed among the inner water jacket, the outer water jacket and the water retaining rings; the outer surface of the inner water jacket is provided with water-proof ribs, two ends of each water-proof rib are respectively and hermetically connected with water-proof rings at two ends of the inner water jacket, and the water-proof ribs are hermetically connected with the inner surface of the outer water jacket; the water inlet and the water outlet are respectively communicated with the cooling water cavity, and are respectively positioned at the left side and the right side of the water barrier;
the air cooling structures are symmetrically arranged on the left side surface and the right side surface of the outer water jacket, each air cooling structure comprises an air inlet and an air outlet which are respectively arranged at the front end and the rear end of the outer surface of the outer water jacket, the outer surface of the outer water jacket is connected with a fan housing in a sealing manner, and the air inlet and the air outlet are sealed in the fan housing to form a heat dissipation cavity; the inner surface of the inner water jacket is provided with a stator, the inner ring of the stator is provided with a rotor, the rotor is sleeved on a rotor shaft, one end of the rotor shaft is connected with a fan, the fan drives to rotate along with the rotor shaft, a plurality of axial air channels which are axially communicated are arranged on the rotor, the fan is positioned at the position of an air inlet, the fan can guide hot air in a cavity where the fan is positioned into the air inlet, and the air in the axial air channels can be guided into the cavity where the fan is positioned.
Further, a plurality of water retaining ribs are arranged on the outer surface of the inner water jacket, the water retaining ribs are distributed at equal intervals along the circumferential direction of the inner water jacket, the water retaining ribs are in sealing connection with the inner surface of the outer water jacket, one ends of the water retaining ribs are in sealing connection with the water retaining ring, gaps are reserved between the other ends of the water retaining ribs and the water retaining ring to form water passing ports, and the water passing ports of any two adjacent water retaining ribs in the water retaining ribs are respectively located at two ends of the inner water jacket.
Further, the water retaining ribs are provided with a plurality of bending angle structures along the length mode, wherein the bending angle is A, and A is more than or equal to 135 degrees and less than or equal to 180 degrees.
Further, the cross section of the heat dissipation cavity is U-shaped.
Further, the area S1 of the air outlet is larger than or equal to the area S2 of the air inlet, wherein S2 is larger than or equal to S1 and smaller than or equal to 1.4S2.
Further, a plurality of radiating ribs parallel to the axis of the outer water jacket are arranged in the fan housing, the lower ends of the radiating ribs are connected to the outer surface of the outer water jacket in a sealing mode, the upper ends of the radiating ribs are connected to the inner surface of the fan housing in a sealing mode, the radiating cavity is divided into a plurality of independent radiating channels by the radiating ribs, one ends of the radiating channels are communicated with the air inlet, and the other ends of the radiating channels are communicated with the air outlet.
Further, the axial length of the inner water jacket is L1, the axial length of the outer water jacket is L2, the length of the stator core is L3, and the axial length of the single side of the stator coil extending out of the stator core is L4, wherein: l3 < L1 < (L3+2L4), (L3+2L4) < L2 < (L3+2L4+300).
Further, the plurality of axial air channels are uniformly distributed along the circumferential direction.
The beneficial effects of the utility model are as follows:
according to the utility model, the cooling water cavity formed by the inner water jacket and the outer water jacket is arranged on the outer surface of the stator, so that heat on the side of the stator can be taken away in time through cooling water for heat dissipation, and the cooling effect of the motor is improved; the water retaining ribs arranged in the cooling water cavity can prolong the flow stroke of the cooling water in the cooling water cavity and improve the cooling effect of the cooling water; the water retaining ribs are provided with the plurality of bending angle structures, so that the retention time of cooling water in the cooling water cavity can be further improved, and the cooling effect of the cooling water is improved; according to the utility model, the air cooling structure is arranged on the surface of the outer water jacket, and heat in the motor rotor can be driven by the fan to enter the air cooling structure outside the motor for heat dissipation, so that the heat dissipation effect in the motor is improved; the heat dissipation cavity is internally provided with the plurality of heat dissipation ribs, the plurality of heat dissipation ribs divide hot air into a plurality of strands, and the strands enter the heat dissipation channels respectively for heat dissipation, so that the heat dissipation effect is further improved; the air cooling structure is arranged on the surface of the water cooling structure, and cooling water in the water cooling structure can take away heat in the air cooling structure, so that the heat dissipation effect of the air cooling structure is further improved; according to the utility model, the axial air duct is arranged in the rotor, so that heat in the rotor can flow into an external air cooling structure through the fan, the heat dissipation effect in the rotor is improved, and the power density and the service life of the motor can be improved; the air inlet and the air outlet of the air cooling structure are only arranged on the outer water jacket, so that the air cooling structure is easier to manufacture and the water cooling structure is simplified.
Drawings
Fig. 1 is a perspective view of an inner and outer water jacket of the present utility model.
Fig. 2 is a side view of the inner and outer water jackets of the present utility model.
Fig. 3 is a perspective view of the inner jacket of the present utility model.
FIG. 4 is a schematic cross-sectional view of the water inlet and outlet of the present utility model.
Fig. 5 is a schematic view showing the development structure of the cooling water cavity of the present utility model.
Fig. 6 is a perspective view of the outer water jacket of the present utility model.
FIG. 7 is a schematic diagram of the operation of the air-cooled structure of the present utility model.
Wherein: 1. an inner water jacket; 2. an outer water jacket; 3. a water inlet; 4. a water outlet; 5. an air inlet; 6. an air outlet; 7. a heat dissipation rib; 8. a fan housing; 9. a heat dissipation cavity; 10. a water blocking ring; 11. water blocking ribs; 12. a water barrier rib; 13. a cooling water cavity; 14. a water passing port; 15. a stator; 16. a rotor; 17. a rotor shaft; 18. a fan; 19. an axial air duct.
Detailed Description
The following describes specific embodiments of the present utility model with reference to the drawings.
As shown in fig. 1, the double cooling system of the permanent magnet synchronous motor comprises an outer water jacket 2 and an inner water jacket 1, wherein the inner water jacket 1 is arranged in the inner cavity of the outer water jacket 2, and a gap is reserved between the inner surface of the outer water jacket 2 and the outer surface of the inner water jacket 1.
As shown in fig. 3, two ends of the inner water jacket 1 are respectively provided with a water blocking ring 10, the outer ring surface of the water blocking ring 10 protrudes out of the outer surface of the inner water jacket 1 and is in sealing connection with the inner surface of the outer water jacket 2, and a cooling water cavity 13 for passing cooling water is formed among the inner water jacket 1, the outer water jacket 2 and the water blocking ring 10. The outer surface of the inner water jacket 1 is provided with water-proof ribs 12, two ends of the water-proof ribs 12 are respectively and hermetically connected with water-proof rings 10 at two ends of the inner water jacket 1, and the water-proof ribs 12 are hermetically connected with the inner surface of the outer water jacket 2.
As shown in fig. 5 and 6, the water inlet 3 and the water outlet 4 are arranged on the outer water jacket 2, the water inlet 3 and the water outlet 4 are respectively communicated with the cooling water cavity 13, the water inlet 3 and the water outlet 4 are respectively positioned at the left side and the right side of the water barrier 12, external cooling water enters the cooling water cavity 13 from the water inlet 3, then flows to the position of the water outlet 4 along the cooling water cavity 13, and then flows out from the water outlet 4, so that the cooling water can finally have a cooling effect on the outer surface of the inner water jacket 1.
In order to improve the water cooling effect, as shown in fig. 3 and 4, a plurality of water blocking ribs 11 are arranged on the outer surface of the inner water jacket 1, and the plurality of water blocking ribs 11 are equidistantly distributed along the circumferential direction of the inner water jacket 1. The water retaining ribs 11 are in sealing connection with the inner surface of the outer water jacket 2, one ends of the water retaining ribs 11 are in sealing connection with the water retaining ring 10, gaps are reserved between the other ends of the water retaining ribs 11 and the water retaining ring 10 to form water passing ports 14, and the water passing ports 14 of any two adjacent water retaining ribs 11 in the water retaining ribs 11 are respectively located at two ends of the inner water jacket 1. The external cooling water enters the cooling water cavity 13 from the water inlet 3, then reaches the water outlet 4 along the closed roundabout waterway formed by the water retaining ribs 11, and then flows out from the water outlet 4, so that the cooling water can play a cooling effect on the outer surface of the inner water jacket 1. The water retaining ribs 11 can prolong the flow stroke of cooling water in the cooling water cavity 13 and improve the cooling effect.
As shown in FIG. 5, the water retaining ribs 11 are provided with a plurality of bending angle structures along the length mode, the bending angle structures can further improve the residence time of cooling water in the cooling water cavity 13, the cooling effect of the cooling water is improved, and the bending angle is A, and the bending angle is more than or equal to 135 degrees and less than or equal to 180 degrees.
As shown in fig. 2 and 6, the left and right side surfaces of the outer water jacket 2 are symmetrically provided with air cooling structures, each air cooling structure comprises an air inlet 5 and an air outlet 6 which are respectively arranged at the front end and the rear end of the outer surface of the outer water jacket 2, the outer surface of the outer water jacket 2 is connected with a fan housing 8 in a sealing manner, and the air inlet 5 and the air outlet 6 are sealed in the fan housing 8 to form a heat dissipation cavity 9. When the motor cooling device works, hot air in the motor enters the cooling cavity 9 from the air inlet 5 to cool, and cooled air enters the motor again from the air outlet 6.
As shown in fig. 2, the cross section of the heat dissipation cavity 9 is U-shaped, and the U-shaped structure is beneficial to the heat dissipation in the heat dissipation cavity 9 to the external environment, so that the heat dissipation effect of the heat dissipation cavity 9 is improved.
The area S1 of the air outlet 6 is larger than or equal to the area S2 of the air inlet 5, wherein S2 is larger than or equal to S1 and smaller than or equal to 1.4S2, and the heat dissipation effect of the heat dissipation cavity 9 is optimal in the size range.
In order to improve the heat dissipation effect, as shown in fig. 2, a plurality of heat dissipation ribs 7 parallel to the axis of the outer water jacket 2 are arranged in the fan housing 8, the lower ends of the plurality of heat dissipation ribs 7 are connected to the outer surface of the outer water jacket 2 in a sealing manner, the upper ends of the plurality of heat dissipation ribs 7 are connected to the inner surface of the fan housing 8 in a sealing manner, the plurality of heat dissipation ribs 7 divide the heat dissipation cavity 9 into a plurality of independent heat dissipation channels, one ends of the plurality of heat dissipation channels are communicated with the air inlet 5, and the other ends of the plurality of heat dissipation channels are communicated with the air outlet 6. When the motor is in operation, hot air in the motor enters the heat dissipation cavity 9 from the air inlet 5, then the hot air is divided into a plurality of strands by the heat dissipation ribs 7 and respectively enters the heat dissipation channels for heat dissipation, and cold air after heat dissipation enters the motor again from the air outlet 6.
As shown in fig. 7, the inner surface of the inner water jacket 1 is provided with a stator 15, the inner ring of the stator 15 is provided with a rotor 16, the rotor 16 is sleeved on a rotor shaft 17, one end of the rotor shaft 17 is connected with a fan 18, and the fan 18 drives rotation along with the rotor shaft 17. The rotor 16 is provided with a plurality of axial air channels 19 which are penetrated in the axial direction, and the plurality of axial air channels 19 are uniformly distributed along the circumferential direction. The fan 18 is located air intake 5 position department, can be with the interior hot-blast direction air intake 5 of place cavity when fan 18 rotates for the inside heat of motor can in time distribute the outside of motor. Meanwhile, when the fan 18 rotates, wind in the axial air duct 19 can be guided into a cavity where the fan is located, so that heat in the rotor 16 can be timely dissipated to the outside of the motor.
As shown in fig. 7, the axial length of the inner water jacket 1 is L1, the axial length of the outer water jacket 2 is L2, the length of the stator 15 core is L3, and the axial length of the stator coil winding extending out of one side of the stator core is L4, wherein: l3 < L1 < (L3+2L4), (L3+2L4) < L2 < (L3+2L4+300).
The working principle of the utility model is as follows: when the motor works, external cooling water enters the cooling water cavity 13 from the water inlet 3 of the outer water jacket 2, flows to the position of the water outlet 4 along the cooling water cavity 13, and flows out of the water outlet 4, so that the cooling water can play a cooling effect on the outer surface of the inner water jacket 1, and heat generated near the stator 15 is transferred into the cooling water cavity 13 through the inner water jacket 1 and is transferred to the external environment by the cooling water. The water retaining ribs 11 can prolong the flow stroke of cooling water in the cooling water cavity 13 and improve the cooling effect. Simultaneously, the rotor shaft 17 drives the rotor 16 to rotate and synchronously drives the fan 18 to rotate, heat generated in the rotor 16 enters the axial air duct 19, the fan 18 can guide hot air in the axial air duct 19 into a cavity where the fan is located, the heat entering the cavity where the fan is located is guided to the air inlet 5 of the outer water jacket 2 by the fan 18, the hot air enters the heat dissipation cavity of the outer water jacket 2 from the air inlet 5 to dissipate heat, the plurality of heat dissipation ribs 7 divide the hot air into a plurality of strands of hot air to enter the heat dissipation channels respectively to dissipate heat, and cooled air after heat dissipation enters the motor again from the air outlet 6 to be recycled. In the process of passing through the heat dissipation cavity, the heat dissipation cavity can play a role in heat dissipation, heat of the hot air is dissipated to the surfaces of the fan housing 8 and the outer water jacket 2, and finally, heat inside the motor is brought into the external environment of the motor, so that a good heat dissipation effect is achieved. Meanwhile, the water cooling structure between the outer water jacket 2 and the inner water jacket 1 can rapidly take away a part of heat in the heat dissipation cavity, so that the heat dissipation effect is further improved.
The above description is intended to illustrate the utility model and not to limit it, the scope of which is defined by the claims, and any modifications can be made within the scope of the utility model.
Claims (8)
1. The utility model provides a two cooling system of PMSM, includes outer water jacket (2) and interior water jacket (1), its characterized in that: the inner water jacket (1) is arranged in an inner cavity of the outer water jacket (2), a gap is reserved between the inner surface of the outer water jacket (2) and the outer surface of the inner water jacket (1), water blocking rings (10) are respectively arranged at two ends of the inner water jacket (1), the outer ring surface of each water blocking ring (10) protrudes out of the outer surface of the inner water jacket (1) and is in sealing connection with the inner surface of the outer water jacket (2), and a cooling water cavity (13) is formed among the inner water jacket (1), the outer water jacket (2) and the water blocking rings (10); the outer surface of the inner water jacket (1) is provided with water-proof ribs (12), two ends of each water-proof rib (12) are respectively and hermetically connected with water-proof rings (10) at two ends of the inner water jacket (1), and the water-proof ribs (12) are hermetically connected with the inner surface of the outer water jacket (2); the water inlet (3) and the water outlet (4) are arranged on the outer water jacket (2), the water inlet (3) and the water outlet (4) are respectively communicated with the cooling water cavity (13), and the water inlet (3) and the water outlet (4) are respectively positioned at the left side and the right side of the water isolation rib (12);
the air cooling structures are symmetrically arranged on the left side surface and the right side surface of the outer water jacket (2), each air cooling structure comprises an air inlet (5) and an air outlet (6) which are respectively arranged at the front end and the rear end of the outer surface of the outer water jacket (2), the outer surface of the outer water jacket (2) is connected with a fan cover (8) in a sealing mode, and the air inlet (5) and the air outlet (6) are sealed inside by the fan cover (8) to form a heat dissipation cavity (9); the inner water jacket is characterized in that a stator (15) is arranged on the inner surface of the inner water jacket (1), a rotor (16) is arranged on the inner ring of the stator (15), the rotor (16) is sleeved on a rotor shaft (17), one end of the rotor shaft (17) is connected with a fan (18), the fan (18) is driven to rotate along with the rotor shaft (17), a plurality of axial air channels (19) which are penetrated in the axial direction are arranged on the rotor (16), the fan (18) is located at the position of the air inlet (5), the fan (18) can guide hot air in a cavity where the fan (18) is located into the air inlet (5), and the air in the axial air channels (19) can be guided into the cavity where the fan (18) is located.
2. The dual cooling system of a permanent magnet synchronous motor of claim 1, wherein: the inner water jacket is characterized in that a plurality of water retaining ribs (11) are arranged on the outer surface of the inner water jacket (1), the water retaining ribs (11) are distributed at equal intervals along the circumferential direction of the inner water jacket (1), the water retaining ribs (11) are connected with the inner surface of the outer water jacket (2) in a sealing mode, one ends of the water retaining ribs (11) are connected with the water retaining ring (10) in a sealing mode, gaps are reserved between the other ends of the water retaining ribs (11) and the water retaining ring (10) to form water passing ports (14), and water passing ports (14) of any two adjacent water retaining ribs (11) in the water retaining ribs (11) are located at two ends of the inner water jacket (1) respectively.
3. The double cooling system of permanent magnet synchronous motor according to claim 2, wherein: the water retaining ribs (11) are provided with a plurality of bending angle structures along the length mode, wherein the bending angle is A, and A is more than or equal to 135 degrees and less than or equal to 180 degrees.
4. The dual cooling system of a permanent magnet synchronous motor of claim 1, wherein: the cross section of the heat dissipation cavity (9) is U-shaped.
5. The dual cooling system of a permanent magnet synchronous motor of claim 4, wherein: the area S1 of the air outlet (6) is larger than or equal to the area S2 of the air inlet (5), S2 is smaller than or equal to S1 and smaller than or equal to 1.4S2.
6. The dual cooling system of a permanent magnet synchronous motor of claim 1, wherein: a plurality of radiating ribs (7) parallel to the axis of the outer water jacket (2) are arranged in the fan housing (8), the lower ends of the radiating ribs (7) are connected to the outer surface of the outer water jacket (2) in a sealing mode, the upper ends of the radiating ribs (7) are connected to the inner surface of the fan housing (8) in a sealing mode, the radiating cavities (9) are divided into a plurality of independent radiating channels by the radiating ribs (7), one ends of the radiating channels are communicated with the air inlet (5), and the other ends of the radiating channels are communicated with the air outlet (6).
7. The dual cooling system of a permanent magnet synchronous motor of claim 1, wherein: the axial length of the inner water jacket (1) is L1, the axial length of the outer water jacket (2) is L2, the length of the stator (15) iron core is L3, the single-side axial length of the stator coil winding extending out of the stator iron core is L4, wherein: l3 < L1 < (L3+2L4), (L3+2L4) < L2 < (L3+2L4+300).
8. The dual cooling system of a permanent magnet synchronous motor of claim 1, wherein: the plurality of axial air channels (19) are uniformly distributed along the circumferential direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320603796.4U CN219554763U (en) | 2023-03-24 | 2023-03-24 | Double-cooling system of permanent magnet synchronous motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320603796.4U CN219554763U (en) | 2023-03-24 | 2023-03-24 | Double-cooling system of permanent magnet synchronous motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219554763U true CN219554763U (en) | 2023-08-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320603796.4U Active CN219554763U (en) | 2023-03-24 | 2023-03-24 | Double-cooling system of permanent magnet synchronous motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219554763U (en) |
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2023
- 2023-03-24 CN CN202320603796.4U patent/CN219554763U/en active Active
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