Double-water-jacket brushless inner rotor motor

Abstract

The utility model relates to a double-water-jacket brushless inner rotor motor, which is characterized in that an inner flow channel and an outer flow channel are respectively arranged on the inner side and the outer side of a stator assembly, so that double-sided cooling is formed, the cooling effect of the stator assembly of the brushless inner rotor motor is greatly improved, and the working temperature of a coil in the stator assembly is quickly reduced; the motor can adapt to stable output with higher power, and the use performance of the motor is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of motors, and in particular relates to a double-water-jacket brushless inner rotor motor. Background Art

[0002] The brushless inner rotor motor can achieve high speed and high power output, but it also generates a lot of heat. In order to enable the brushless inner rotor motor to maintain a good and stable working state under high power conditions, the coil needs to be effectively cooled.

[0003] Conventional heat dissipation methods mainly include air cooling and water cooling. Compared with air cooling, water cooling has a better cooling effect. However, the current conventional water cooling technology can usually only cool one side of the motor coil and cannot take into account both sides of the coil. Therefore, the effect of water cooling is still limited. How to further improve the cooling effect of the motor coil is the key to further improving motor performance. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a double-water-jacket brushless inner rotor motor, solving the technical problem that the single-layer water cooling of the current brushless motor limits the further improvement of the motor performance.

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is: a double water jacket brushless inner rotor motor, comprising a casing with an opening at the rear end, a rear cover sealed and connected to the rear end of the casing, a stator assembly fixedly connected to the inner wall of the casing, and a rotor assembly rotatably connected to the inside of the casing, the front end of the rotating shaft of the rotor assembly is rotatably connected to the front end plate of the casing through a front bearing, the rear end of the rotating shaft is rotatably connected to the rear cover through a rear bearing, the rotating shaft passes through the front end plate of the casing and extends out of the casing, the rear cover is provided with a positioning ring that cooperates with the inner wall of the rear end of the casing, a rear bearing seat that is integrally formed with the rear cover is coaxially arranged inside the positioning ring, a rear assembly hole is provided in the center of the rear bearing seat, the rear bearing is embedded in the rear assembly hole, an inner water jacket that is coaxially arranged and integrally formed with the rear assembly hole is connected to the outer edge of the rear bearing seat, the inner water jacket extends toward the front end plate of the casing, and the rotating shaft is coaxially arranged in the inner water jacket A front bearing seat is integrally formed on the inner side surface of the front end plate of the casing, and a front assembly hole is provided on the front bearing seat, and the front bearing is embedded in the front assembly hole, and the outer diameter of the front bearing seat is not less than the outer diameter of the inner water jacket, and one end of the inner water jacket away from the rear bearing seat is sealed and abutted with the front bearing seat, and an annular inner flow channel is formed between the inner water jacket and the rotor assembly; the outer edge of the rear cover extends radially outward to the outside of the casing and is connected to an outer water jacket coaxially arranged with the casing, and the outer water jacket is sleeved on the outside of the casing, and the outer wall of the front end of the casing extends radially outward to form a retaining ring, and one end of the outer water jacket away from the rear cover is sealed and abutted with the retaining ring, and an outer flow channel is formed between the outer water jacket and the casing; an inner water outlet connecting the outside world and the inner flow channel is provided on the rear bearing seat, an inner water inlet connecting the outside world and the inner flow channel is provided on the front bearing seat, and an outer water inlet and an outer water outlet connecting the outside world and the outer flow channel are respectively provided at both ends of the outer water jacket.

[0006] As a preferred solution, the outer wall of the inner water jacket is in contact with the inner wall of the stator assembly.

[0007] As a preferred solution, an inner ring groove coaxial with the inner water jacket is formed on the end face of one end of the front bearing seat facing the rear bearing seat, and an inner compression ring matching the inner ring groove is integrally formed at the front end of the inner water jacket, the axial length of the inner compression ring is smaller than the depth of the inner ring groove, a first sealing ring is embedded in the inner ring groove, and the inner compression ring is inserted into the inner ring groove and pressed tightly against the first sealing ring.

[0008] As a preferred solution, an outer ring groove is provided on the end face of the retaining ring facing the rear cover, and the inner edge of the end of the outer water jacket abutting the retaining ring extends axially outward to form an outer crimping ring that cooperates with the outer ring groove. The outer crimping ring and the end face of the outer water jacket form a step, and a third sealing ring is sleeved on the step. A second sealing ring is embedded in the outer ring groove. The outer crimping ring is inserted into the outer ring groove and tightly abuts against the second sealing ring, and the end of the outer water jacket and the retaining ring are sealed by the third sealing ring.

[0009] As a preferred solution, a circumferentially extending annular sealing groove is provided on the outer circumferential wall of the positioning ring, a fourth sealing ring is embedded in the sealing groove, and the positioning ring is sealed and connected to the inner wall of the casing via the fourth sealing ring.

[0010] The beneficial effects of the utility model are as follows: the utility model forms double-sided cooling by respectively arranging inner flow channels and outer flow channels on the inner and outer sides of the stator assembly, thereby greatly improving the cooling effect of the stator assembly of the brushless inner rotor motor, quickly reducing the operating temperature of the coil in the stator assembly, enabling the motor to adapt to a higher power stable output, and improving the performance of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The specific implementation of the utility model is further described in detail below with reference to the accompanying drawings, wherein:

[0012] Figure 1 It is a schematic diagram of a half-section structure of the utility model;

[0013] Figure 1 In: 1. casing, 1a. front end plate, 2. rear cover, 3. stator assembly, 4. rotor assembly, 4a. shaft, 5. front bearing, 6. rear bearing, 7. positioning ring, 8. rear bearing seat, 9. rear assembly hole, 10. inner water jacket, 11. front bearing seat, 12. front assembly hole, 13. inner flow channel, 14. outer water jacket, 15. retaining ring, 16. outer flow channel, 17. inner water outlet, 18. inner water inlet, 19. outer water inlet, 20. outer water outlet, 21. inner ring groove, 22. inner crimping ring, 23. first sealing ring, 24. outer ring groove, 25. outer crimping ring, 26. step, 27. third sealing ring, 28. second sealing ring, 29. sealing groove, 30. fourth sealing ring. DETAILED DESCRIPTION

[0014] The specific implementation scheme of the utility model is described in detail below in conjunction with the accompanying drawings.

[0015] like Figure 1 The double water jacket brushless inner rotor motor shown in the figure comprises a housing 1 with an opening at the rear end, a rear cover 2 sealedly connected to the rear end of the housing 1, a stator assembly 3 fixedly connected to the inner wall of the housing 1, and a rotor assembly 4 rotatably connected to the inside of the housing 1, wherein the front end of the rotating shaft 4a of the rotor assembly 4 is rotatably connected to the front end plate 1a of the housing 1 through a front bearing 5, and the rear end of the rotating shaft 4a is rotatably connected to the rear cover 2 through a rear bearing 6, and the rotating shaft 4a passes through the front end plate 1a of the housing 1 and extends out of the housing 1, and the rear cover 2 is provided with a There is a positioning ring 7 that cooperates with the inner wall of the rear end of the casing 1, and a rear bearing seat 8 that is integrally formed with the rear cover 2 is coaxially arranged inside the positioning ring 7. A rear assembly hole 9 is opened in the center of the rear bearing seat 8, and the rear bearing 6 is embedded in the rear assembly hole 9. The outer edge of the rear bearing seat 8 is connected to an inner water jacket 10 that is coaxially arranged and integrally formed with the rear assembly hole 9. The inner water jacket 10 extends toward the front end plate 1a of the casing 1, and the rotating shaft 4a is coaxially arranged in the inner water jacket 10. The inner side surface of the front end plate 1a of the casing 1 is integrally formed with a front The bearing seat 11 has a front assembly hole 12, and the front bearing 5 is embedded in the front assembly hole 12. The outer diameter of the front bearing seat 11 is not less than the outer diameter of the inner water jacket 10. The end of the inner water jacket 10 away from the rear bearing seat 8 is sealed and abutted against the front bearing seat 11. An annular inner flow channel 13 is formed between the inner water jacket 10 and the rotor assembly 4. The outer edge of the rear cover 2 extends radially outward to the outside of the casing 1 and is connected to an outer water jacket 14 coaxially arranged with the casing 1. The outer water jacket 14 is sleeved on the casing 1, the outer wall of the front end of the casing 1 radially extends outward to form a retaining ring 15, one end of the outer water jacket 14 away from the rear cover 2 is sealed and abutted against the retaining ring 15, and an outer flow channel 16 is formed between the outer water jacket 14 and the casing 1; the rear bearing seat 8 is provided with an inner water outlet 17 connecting the outside world with the inner flow channel 13, the front bearing seat 11 is provided with an inner water inlet 18 connecting the outside world with the inner flow channel 13, and both ends of the outer water jacket 14 are respectively provided with an outer water inlet 19 and an outer water outlet 20 connecting the outside world with the outer flow channel 16.

[0016] By respectively arranging the inner flow channel 13 and the outer flow channel 16 on the inner and outer sides of the stator assembly 3, double-sided cooling is formed for the stator assembly 3, which greatly improves the cooling effect of the stator assembly 3 of the brushless inner rotor motor, quickly reduces the operating temperature of the coil in the stator assembly 3, enables the motor to adapt to higher power stable output, and improves the performance of the motor.

[0017] In this embodiment, the outer wall of the inner water jacket 10 is in contact with the inner wall of the stator assembly 3 to increase the heat conduction efficiency and improve the water cooling effect.

[0018] In this embodiment, an inner ring groove 21 coaxial with the inner water jacket 10 is formed on the end surface of one end of the front bearing seat 11 facing the rear bearing seat 8, and an inner crimping ring 22 matching the inner ring groove 21 is integrally formed at the front end of the inner water jacket 10. The axial length of the inner crimping ring 22 is less than the depth of the inner ring groove 21. A first sealing ring 23 is embedded in the inner ring groove 21. The inner crimping ring 22 is inserted into the inner ring groove 21 and pressed tightly against the first sealing ring 23, thereby achieving a reliable sealing connection between the inner water jacket 10 and the front bearing seat 11, and making the motor assembly easier.

[0019] An outer ring groove 24 is formed on the end surface of the retaining ring 15 facing the rear cover 2. The inner edge of the end of the outer water jacket 14 abutting against the retaining ring 15 extends axially outward to form an outer crimping ring 25 that cooperates with the outer ring groove 24. The outer crimping ring 25 and the end surface of the outer water jacket 14 form a step 26. A third sealing ring 27 is sleeved on the step 26. A second sealing ring 28 is embedded in the outer ring groove 24. The outer crimping ring 25 is inserted into the outer ring groove 24 and tightly abuts against the second sealing ring 28. The end of the outer water jacket 14 and the retaining ring 15 are sealed by the third sealing ring 27, thereby realizing a reliable sealing connection between the outer water jacket 14 and the retaining ring 15, and making the motor assembly simpler.

[0020] In this embodiment, a circumferentially extending annular sealing groove 29 is formed on the outer circumferential wall of the positioning ring 7 , a fourth sealing ring 30 is embedded in the sealing groove 29 , and the positioning ring 7 is sealedly connected to the inner wall of the housing 1 via the fourth sealing ring 30 .

[0021] The working process of this utility model is: Figure 1 As shown, when the motor is working, the inner water inlet 18 and the outer water inlet 19 can be connected to the cooling water source respectively, and the inner water outlet 17 and the outer water outlet 20 can be connected to the cooling water recovery device respectively. The cooling water source continuously injects cooling water into the inner flow channel 13 and the outer flow channel 16, and the cooling water cools the inner and outer sides of the stator assembly 3 at the same time, thereby greatly improving the cooling effect of the stator assembly, allowing the motor to maintain long-term stable operation under high power output conditions, and improving the motor performance. The double water jacket brushless inner rotor motor technology described in the utility model is particularly suitable for high-power water pump motors.

[0022] The above embodiments are only illustrative of the principles and effects of the invention, as well as some embodiments of its application, and are not intended to limit the invention. It should be pointed out that a person skilled in the art can make several modifications and improvements without departing from the inventive concept of the invention, and all of these belong to the protection scope of the invention.

Claims

1. A double water jacket brushless inner rotor motor, comprising a housing (1) with an opening at the rear end, a rear cover (2) sealedly connected to the rear end of the housing (1), a stator assembly (3) fixedly connected to the inner wall of the housing (1), and a rotor assembly (4) rotatably connected to the inside of the housing (1), wherein the front end of a rotating shaft (4a) of the rotor assembly (4) is rotatably connected to a front end plate (1a) of the housing (1) via a front bearing (5), the rear end of the rotating shaft (4a) is rotatably connected to the rear cover (2) via a rear bearing (6), the rotating shaft (4a) passes through the front end plate (1a) of the housing (1) and extends out of the housing (1), and is characterized in that: The rear cover (2) is provided with a positioning ring (7) which cooperates with the inner wall of the rear end of the housing (1); a rear bearing seat (8) which is integrally formed with the rear cover (2) is coaxially arranged inside the positioning ring (7); a rear assembly hole (9) is provided at the center of the rear bearing seat (8); the rear bearing (6) is embedded in the rear assembly hole (9); an inner water jacket (10) which is coaxially arranged with the rear assembly hole (9) and integrally formed is connected to the outer edge of the rear bearing seat (8); the inner water jacket (10) is disposed toward the housing The housing (1) extends from a front end plate (1a), the rotating shaft (4a) is coaxially arranged in the inner water jacket (10), a front bearing seat (11) is integrally formed on the inner side surface of the front end plate (1a) of the housing (1), a front assembly hole (12) is formed on the front bearing seat (11), a front bearing (5) is embedded in the front assembly hole (12), an outer diameter of the front bearing seat (11) is not less than an outer diameter of the inner water jacket (10), and a portion of the inner water jacket (10) away from the rear bearing seat (8) is provided. The end of the rear cover (2) is in sealing contact with the front bearing seat (11); an annular inner flow channel (13) is formed between the inner water jacket (10) and the rotor assembly (4); the outer edge of the rear cover (2) radially extends outward to the outside of the casing (1) and is connected to an outer water jacket (14) coaxially arranged with the casing (1); the outer water jacket (14) is sleeved on the outside of the casing (1); the outer wall of the front end of the casing (1) radially extends outward to form a retaining ring (15); the end of the outer water jacket (14) away from the rear cover (2) is in contact with the outer water jacket (14); The retaining ring (15) is in sealing contact, and an outer flow channel (16) is formed between the outer water jacket (14) and the casing (1); an inner water outlet (17) connecting the outside world with the inner flow channel (13) is formed on the rear bearing seat (8), an inner water inlet (18) connecting the outside world with the inner flow channel (13) is formed on the front bearing seat (11), and an outer water inlet (19) and an outer water outlet (20) connecting the outside world with the outer flow channel (16) are respectively formed at both ends of the outer water jacket (14).

2. The double water jacket brushless inner rotor motor according to claim 1, characterized in that: The outer wall of the inner water jacket (10) is in contact with the inner wall of the stator assembly (3).

3. The double water jacket brushless inner rotor motor according to claim 1, characterized in that: An inner ring groove (21) coaxial with the inner water jacket (10) is formed on an end surface of one end of the front bearing seat (11) facing the rear bearing seat (8); an inner press-fit ring (22) matching the inner ring groove (21) is integrally formed at the front end of the inner water jacket (10); the axial length of the inner press-fit ring (22) is smaller than the depth of the inner ring groove (21); a first sealing ring (23) is embedded in the inner ring groove (21); the inner press-fit ring (22) is inserted into the inner ring groove (21) and tightly pressed against the first sealing ring (23).

4. The double water jacket brushless inner rotor motor according to claim 1, characterized in that: An outer ring groove (24) is formed on the end surface of the retaining ring (15) facing the rear cover (2); the inner edge of the end of the outer water jacket (14) abutting against the retaining ring (15) extends axially outward to form an outer crimping ring (25) cooperating with the outer ring groove (24); the outer crimping ring (25) and the end surface of the outer water jacket (14) form a step (26); a third sealing ring (27) is sleeved on the step (26); a second sealing ring (28) is embedded in the outer ring groove (24); the outer crimping ring (25) is inserted into the outer ring groove (24) and tightly abuts against the second sealing ring (28); the end of the outer water jacket (14) and the retaining ring (15) are sealed by the third sealing ring (27).

5. The double water jacket brushless inner rotor motor according to claim 1, characterized in that: A circumferentially extending annular sealing groove (29) is provided on the outer circumferential wall of the positioning ring (7), a fourth sealing ring (30) is embedded in the sealing groove (29), and the positioning ring (7) is sealedly connected to the inner wall of the housing (1) via the fourth sealing ring (30).

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