Water-cooling casing and motor

Abstract

The utility model provides a water-cooling casing and a motor, and belongs to the technical field of motors. The technical problem that an existing water-cooling machine shell is inconvenient to machine is solved. A water-cooling machine shell comprises a shell body, an upper cover and a lower cover, the upper cover and the lower cover are detachably and fixedly arranged at the two axial ends of the shell body respectively, the water-cooling machine shell further comprises a stainless steel pipeline and a fixing cylinder, the stainless steel pipeline is fixedly arranged on the peripheral face of the fixing cylinder, and the stainless steel pipeline, the fixing cylinder and the shell body are integrally formed. A water inlet and a water outlet are formed in the peripheral surface of the shell; and two ports of the stainless steel pipeline respectively extend out of the water inlet and the water outlet. The utility model has the advantages of convenient processing, difficult leakage and the like.

Description

Technical Field

[0001] The utility model belongs to the technical field of motors, in particular to a water-cooling casing and a motor. Background Art

[0002] Many vacuum motors use a water-cooling casing. The coolant flowing through the spiral flow channel set on the water-cooling casing can effectively cool the motor.

[0003] At present, the existing technology adopts the method of making the shell into two layers, and then digging a spiral flow channel on the side wall of one layer of the shell, and then sealing it with another layer of the shell, which can easily cause water leakage. For example, patent No. 2020102555202 is a water-cooled motor shell, which has a water inlet and a water outlet on the shell, and the water cooling pipe is embedded in the shell. The water cooling pipe is spirally arranged in the shell, and the two ends of the water cooling pipe are respectively connected to the water inlet and the water outlet, and then the sealing fixings are respectively installed in the water inlet and the water outlet to connect to the two ends of the water cooling pipe. However, the water cooling pipes of this patent are difficult to be evenly distributed in the shell, and are inconvenient to install. Summary of the invention

[0004] In view of the shortcomings of the prior art, the purpose of the utility model is to provide a water-cooling housing and a motor. The technical problem to be solved by the utility model is how to make the flow channel processing of the water-cooling housing more convenient and less prone to leakage.

[0005] The purpose of the utility model can be achieved through the following technical solutions: a water-cooled casing, comprising a shell, an upper cover and a lower cover, wherein the upper cover and the lower cover are respectively detachably fixed at the two ends of the shell in an axial direction, and also comprising a stainless steel pipe and a fixed cylinder, wherein the stainless steel pipe is fixedly arranged on the outer circumference of the fixed cylinder, the stainless steel pipe and the fixed cylinder are integrally formed with the shell, and a water inlet and a water outlet are arranged on the outer circumference of the shell, and two ports of the stainless steel pipe extend out of the water inlet and the water outlet respectively.

[0006] The principle of the water-cooled case is to introduce water into the water-cooled case and contact it with the heat conduction surface of the water-cooled case, so that part of the heat is taken away by the flow of water. The vacuum pump is an important vacuum equipment. Since it generates a lot of heat when working, effective heat dissipation is required to ensure the normal operation of the equipment. The water-cooled case reduces the temperature of the equipment by circulating water, and can also effectively improve the service life of the equipment. The stability of the water-cooled case structure and the convenience of production and processing are also very important. The stainless steel pipe is fixed on the outer circumference of the fixed cylinder and then integrally formed with the shell. It is easy to manufacture. The stainless steel pipe has a complete flow channel and is not easy to leak. By externally connecting the two ports of the stainless steel pipe extending from the water inlet and the water outlet to the water pipe, there is no need to set up an extra sealing structure. The overall water-cooled case is easy to manufacture and not easy to leak, which improves production efficiency.

[0007] In the above water-cooled casing, the stainless steel pipe is spirally welded and fixed on the outer circumference of the fixed cylinder, the shell is integrally formed with the stainless steel pipe and the fixed cylinder by casting, and the inner circumference of the fixed cylinder protrudes inwardly from the inner circumference of the shell.

[0008] First, wrap the stainless steel pipe around the outer circumference of the fixed cylinder, then weld the stainless steel pipe and the fixed cylinder so that the stainless steel pipe can be evenly fixed on the outer circumference of the fixed cylinder, and then place the stainless steel pipe and the fixed cylinder in a mold for casting to form an integrated shell. Casting includes gravity casting or die casting. The stainless steel pipe is relatively complete without gaps, which reduces the risk of leakage and can better dissipate heat for the motor. The inner circumference of the fixed cylinder protrudes inward from the inner circumference of the shell, and the stator abuts against the inner circumference of the fixed cylinder, so that the stator can dissipate heat better. The material of the shell is aluminum or aluminum alloy. Taking advantage of the different melting points between it and stainless steel, the stainless steel pipe is pre-buried and then gravity casting or die casting is performed, and the spiral flow channel is integrally formed into the shell, which simplifies the original processing steps and is more conducive to production.

[0009] In the above water-cooled housing, the housing includes an upper connection part, a water-cooled part and a lower connection part, the stainless steel pipe is located in the water-cooled part, a plurality of heat dissipation grooves are arranged on the outer peripheral surface of the water-cooled part, the upper cover is fixedly connected to the upper connection part by a fixing member 1, and the lower cover is fixedly connected to the lower connection part by a fixing member 2. The heat dissipation grooves can dissipate heat better, and the fixing members 1 and 2 fix the upper cover and the lower cover, and are also convenient for disassembly and later maintenance.

[0010] The motor comprises the water-cooling casing, a stator, a rotor and a rotating shaft fixed to each other, a shielding sleeve being sealed and fixed between the upper cover and the lower cover, the shielding sleeve dividing the interior of the water-cooling casing into a vacuum chamber and an air chamber which are not connected to each other, the rotor and the rotating shaft being located in the vacuum chamber, the rotating shaft being supported by bearings respectively between the upper cover and the lower cover, the stator being located in the air chamber, and an exhaust valve hole being provided on the casing, the exhaust valve hole being connected to the air chamber.

[0011] The water-cooled casing is used to achieve better heat dissipation of the motor. The shaft is supported by bearings on the upper cover and the lower cover respectively, so the rotation stability of the shaft is better. The shielding sleeve separates the accommodating cavity into a vacuum cavity and an air cavity that are not connected to each other. The shaft and the rotor are in a vacuum environment in the vacuum cavity. The vacuum cavity is connected to the vacuum pump. There is no need to seal the shaft. It is sufficient to seal the upper cover and the vacuum pump statically. The static seal greatly prolongs the service life of the motor and the vacuum pump, enhances the adaptability of the motor and improves its power output. At the same time, the stator is in the air cavity, which is connected to the outside world to conduct heat. , and the shell is used to make the heat dissipation effect of the motor better; after the gas in the vacuum chamber is evacuated, the outer side of the shielding sleeve becomes lower than the internal temperature of the shielding sleeve due to the influence of the air in the air cavity, which causes dew to form on the outer side of the shielding sleeve and gradually drips into condensed water; long-term use and failure to deal with the condensed water in time will cause the shielding sleeve to rust, and the falling of rusted impurities will affect the coordinated rotation of the stator and the rotor. Therefore, an exhaust valve hole is set on the shell, and the exhaust valve hole can discharge the condensed water in time, thereby extending the service life of the shielding sleeve and making the motor better in a vacuum environment to enhance the adaptability of the motor and improve the power output.

[0012] In the above motor, the shielding sleeve comprises a fixed portion and a cylindrical portion which are fixedly connected, the fixed portion is located at one end of the cylindrical portion and is sealed and fixed to the upper cover, and the cylindrical portion passes between the stator and the rotor and is sealed and fixed to the lower cover. The fixed portion and the cylindrical portion of the shielding sleeve can be welded or threaded, or can be integrally formed, wherein the shielding sleeve should be made of a non-magnetic and non-rusting material.

[0013] In the above-mentioned motor, the upper cover also includes an integrally formed top wall, and the lower end surface of the top wall has coaxial positioning ring 1 and positioning ring 2 protruding downward, the lower end surface of the positioning ring 1 is higher than the lower end surface of the positioning ring 2, the fixed part has an annular groove coaxial with the cylindrical part, the outer circumferential surface of the annular groove abuts against the outer circumferential surface of the positioning ring 1 and makes the upper end surface of the fixed part abut against the lower end surface of the positioning ring 2, a sealing groove 2 is provided at the position where the fixed part abuts against the positioning ring 2, a sealing member 2 is provided in the sealing groove 2, and the fixed part and the top wall are fixed by a fastener 3.

[0014] The upper cover may also include an integrally formed flange, side walls and a top wall, the flange and the top wall being located on both sides of the side wall, a sealing groove 1 being arranged between the flange and the side wall, the flange being fixedly connected to the vacuum pump so that the inside of the shielding sleeve and the inside of the vacuum pump are sealed into an integrated vacuum environment, and in order to make the shielding sleeve and the rotor shaft have better coaxiality, a positioning ring 1 is provided which cooperates with the annular groove and a fastener 3 is provided to fix the shielding sleeve on the positioning ring 2, so that the shielding sleeve can be better fixed between the rotor and the stator and isolate the vacuum chamber and the air chamber.

[0015] In the above-mentioned motor, the lower cover has an annular boss 2, a fixed ring is arranged on the inner side of the lower end of the cylindrical part, the inner side surface of the fixed ring abuts against the outer side surface of the annular boss 2, and a sealing groove 3 is arranged on the outer peripheral surface of the annular boss 2 relative to the fixed ring, and a sealing member 3 is arranged in the sealing groove 3.

[0016] The inner side of the fixed ring abuts against the outer side of the second annular boss, and the outer peripheral surface of the annular groove abuts against the outer peripheral surface of the first positioning ring to form a fixed mode at both ends, so that the shielding sleeve is better coaxial with the shaft, so that the shaft drives the rotor to rotate better, and the shielding sleeve is better fixed between the rotor and the stator and isolates the vacuum chamber and the air chamber. When the motor fails, the stator can be taken out for maintenance by simply removing the cover and the housing, which is convenient for installation and maintenance.

[0017] In the above-mentioned motor, the rotating shaft includes, in sequence, an integrally formed connecting section 1, a cover plate 1, a fixing section, a cover plate 2 and a connecting section 2; the upper cover has an annular boss 1, and the lower cover has an annular boss 2; the annular boss 1 and the annular boss 2 are arranged relatively to each other and are both located in the vacuum chamber; the annular boss 1 has an installation groove 1, in which a bearing 1 is installed; the annular boss 2 has an installation groove 2, in which a bearing 2 is installed; the connecting section 1 is connected to the bearing 1 and extends out of the upper cover, the cover plate 1 abuts and covers the bearing 1, the fixing section is fixed to the rotor, the connecting section 2 is connected to the bearing 2, and the cover plate 2 abuts and covers the bearing 2.

[0018] Since the air in the vacuum chamber needs to be evacuated to form a vacuum environment, it is easy to draw out the bearing oil in bearing two and bearing one when evacuating the vacuum, and the bearing oil will enter the rotor, which will seriously affect the rotation of the rotor. Therefore, cover plate one covers bearing one, and cover plate two covers bearing two to prevent the bearing oil from being drawn out.

[0019] In the above-mentioned motor, a step hole groove 1 is arranged in the installation groove 1, the inner diameter of the step hole groove 1 is smaller than the inner diameter of the installation groove 1, the outer ring of the bearing 1 abuts on the step surface of the step hole groove 1, a positioning ring 1 protrudes from the end of the cover plate 1 close to the bearing 1, the positioning ring 1 abuts on the inner ring of the bearing 1, the outer circumferential diameter of the cover plate 1 is the same as the diameter of the installation groove 1, and an annular exhaust groove 1 is arranged at the end of the installation groove 1 close to the cover plate 1.

[0020] The cooperation between the positioning ring 1 and the step hole groove 1 can not only fix the bearing 1 to ensure the normal rotation of the bearing 1, but also form a gap between the bearing 1 and the cover plate 1, and the gap is connected to the exhaust groove 1. This arrangement can prevent the bearing oil from being sucked away and can better extract the air in the installation groove 1.

[0021] In the above motor, the second installation groove is provided with a second step hole groove, the inner diameter of which is smaller than the inner diameter of the second installation groove, the outer ring of the second bearing abuts against the step surface of the second step hole groove, the second cover plate protrudes with a second positioning ring at one end close to the second bearing, the second positioning ring abuts against the inner ring of the second bearing, the outer diameter of the second cover plate is the same as the diameter of the second installation groove, the second cover plate is located in the second installation groove, the second installation groove is provided with a second annular exhaust groove relative to the position of the second cover plate, the diameter of the second exhaust groove is larger than the diameter of the second installation groove. This arrangement can prevent the bearing oil from being sucked away and can better extract the air in the second installation groove, so that the motor is better in a vacuum environment to enhance the adaptability of the motor and improve the power output.

[0022] Compared with the prior art, the technical effects of the utility model are as follows: 1. The integrally formed shell, stainless steel pipe and fixed cylinder have a stable structure and are easy to manufacture. The stainless steel pipe has a complete flow channel and is not easy to leak. By externally connecting water pipes to the two ports of the stainless steel pipe extending out of the water inlet and the water outlet, there is no need to set up unnecessary sealing structures. The overall water-cooled casing is easy to manufacture and not easy to leak, thereby improving production efficiency.

[0023] 2. The motor shaft is supported by bearings on the upper and lower covers of the casing, respectively, so that the shaft has better rotation stability; the shielding sleeve divides the accommodating cavity into a vacuum cavity and an air cavity which are not connected to each other, and the shaft and the rotor are in a vacuum environment in the vacuum cavity to enhance the adaptability of the motor and improve the power output. At the same time, the stator is in the air cavity, which is connected to the outside world to conduct heat, and the water-cooled casing is used to improve the heat dissipation effect of the motor; an exhaust valve hole is arranged on the motor casing, and the exhaust valve hole can discharge the condensed water on the shielding sleeve in time, thereby extending the service life of the shielding sleeve and making the motor better in a vacuum environment to enhance the adaptability of the motor and improve the power output. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is an exploded view of the water-cooling casing of the utility model.

[0025] Figure 2 It is a cross-sectional view of the water-cooling casing and the shielding sleeve of the utility model.

[0026] Figure 3 It is an AA enlarged view of the utility model.

[0027] Figure 4 It is an enlarged view of BB of the present utility model.

[0028] Figure 5 It is a cross-sectional view of the motor of the utility model.

[0029] Figure 6 It is a schematic diagram of the rotating shaft of the utility model.

[0030] Figure number marking: 1, shell; 1a, upper connection; 1b, water cooling part; 1c, lower connection; 101, water inlet; 102, water outlet; 103, heat dissipation groove; 104, exhaust valve hole; 2, upper cover; 2a, top wall; 2b, annular boss 1; 201, positioning ring 1; 202, positioning ring 2; 203, mounting groove 1; 204, exhaust groove 1; 205, step hole groove 1; 3, lower cover; 3a, annular boss 2; 301, mounting groove 2; 302, sealing groove 3; 304, step hole groove 2; 30 5. Exhaust groove 2; 5. Stainless steel pipe; 6. Fixed cylinder; 7. Stator; 8. Rotor; 9. Rotating shaft; 901. Connecting section 1; 902. Cover plate 1; 9021. Positioning ring 1; 903. Fixed section; 904. Cover plate 2; 9041. Positioning ring 2; 905. Connecting section 2; 10. Shielding sleeve; 10a. Fixed part; 10b. Cylinder part; 1001. Annular groove; 1002. Sealing groove 2; 1003. Fixed ring; 11. Vacuum chamber; 12. Air chamber; 13. Bearing 1; 14. Bearing 2. DETAILED DESCRIPTION

[0031] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0032] It should be noted that the descriptions of the present invention regarding directions such as "up", "down", "left", "right", "top" and "bottom" are all defined based on the relationships between the orientations or positions shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device must be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0033] according to Figure 1 and Figure 2As shown, a water-cooled casing is used as the outer shell of the motor to promote the heat dissipation of the motor. The principle of the water-cooled casing is to introduce water into the water-cooled casing and contact it with the heat conduction surface of the water-cooled casing, so as to take away part of the heat through the flow of water. The water-cooled casing includes a shell 1, an upper cover 2, a lower cover 3, a stainless steel pipe 5 and a fixed cylinder 6. The upper cover 2 and the lower cover 3 are respectively detachably fixed at the two ends of the axial direction of the shell 1. The stainless steel pipe 5 is fixed on the outer circumference of the fixed cylinder 6. The stainless steel pipe 5 and the fixed cylinder 6 are integrally formed with the shell 1. A water inlet 101 and a water outlet 102 are provided on the outer circumference of the shell 1. The two ports of the stainless steel pipe 5 extend out of the water inlet 101 and the water outlet 102 respectively. The inner side surfaces of the water inlet 101 and the water outlet 102 can be provided with internal threads for fixing the external connecting pipe. The stainless steel pipe 5 is spirally welded and fixed on the outer circumference of the fixed cylinder 6 , and the shell 1 is integrally formed with the stainless steel pipe 5 and the fixed cylinder 6 by casting, and the inner circumference of the fixed cylinder 6 protrudes inwardly from the inner circumference of the shell 1 .

[0034] The steps of manufacturing the water-cooled casing are as follows: the stainless steel pipe 5 is spirally wound around the outer circumference of the fixed cylinder 6, and then the stainless steel pipe 5 and the fixed cylinder 6 are welded so that the stainless steel pipe 5 can be evenly fixed on the outer circumference of the fixed cylinder 6, and then the stainless steel pipe 5 and the fixed cylinder 6 are placed in a mold for casting to form an integrated shell 1, and the casting may be gravity casting or die casting, etc.; the inner circumference of the fixed cylinder 6 protrudes inward from the inner circumference of the shell 1, and the stator 7 abuts against the inner circumference of the fixed cylinder 6, so that the stator 7 can dissipate heat better. The material of the shell 1 is aluminum or aluminum alloy. Taking advantage of the different melting points between it and the stainless steel material, the stainless steel pipe is pre-buried and then gravity casting or die casting is performed, and the spiral flow channel is integrally formed into the shell 1, which simplifies the original processing steps and is more conducive to production.

[0035] The housing 1 includes an upper connection part 1a, a water cooling part 1b and a lower connection part 1c. The stainless steel pipe 5 is located in the water cooling part 1b. The outer peripheral surface of the water cooling part 1b is provided with a plurality of heat dissipation grooves 103. The upper cover 2 is fixedly connected to the upper connection part 1a through a fixing part 1, and the lower cover 3 is fixedly connected to the lower connection part 1c through a fixing part 2. The heat dissipation grooves 103 can dissipate heat better. The fixing parts 1 and 2 fix the upper cover 2 and the lower cover 3, and are also convenient for disassembly and later maintenance.

[0036] according to Figure 2-6As shown, the motor includes the above-mentioned water-cooling casing, the stator 7, the rotor 8 and the rotating shaft 9 fixed to each other, a shielding sleeve 10 is sealed and fixed between the upper cover 2 and the lower cover 3, and the shielding sleeve 10 divides the interior of the water-cooling casing into a vacuum chamber 11 and an air chamber 12 that are not connected to each other. The rotor 8 and the rotating shaft 9 are located in the vacuum chamber 11, and the rotating shaft 9 is supported by bearings between the upper cover 2 and the lower cover 3 respectively. The stator 7 is located in the air chamber 12, and an exhaust valve hole 104 is also provided on the shell 1, and the exhaust valve hole 104 is connected to the air chamber 12. The rotating shaft 9 is supported by bearings on the upper cover 2 and the lower cover 3 respectively, so the rotating shaft 9 has better rotation stability, and the shielding sleeve 10 divides the accommodating cavity into a vacuum cavity 11 and an air cavity 12 which are not communicated with each other. The rotating shaft 9 and the rotor 8 are in a vacuum environment in the vacuum cavity 11, and the vacuum cavity 11 is connected to the vacuum pump. There is no need to seal the rotating shaft 9, and it is sufficient to perform static sealing on the upper cover 2 and the vacuum pump. The static sealing greatly prolongs the service life of the motor and the vacuum pump, enhances the adaptability of the motor and improves its power output; at the same time, the stator 7 is in the air cavity 12, and the air cavity 12 is connected to the outside world to conduct heat, and the housing 1 is used to make the motor The heat dissipation effect of the machine is better; after the gas in the vacuum chamber 11 is evacuated, the outer side of the shielding sleeve 10 becomes lower than the internal temperature of the shielding sleeve 10 due to the influence of the air in the air chamber 12, which causes dew to form on the outer side of the shielding sleeve 10 and gradually drips into condensed water; long-term use and failure to promptly handle the condensed water will cause the shielding sleeve 10 to rust, and the falling of rusted impurities will affect the coordinated rotation of the stator 7 and the rotor 8. Therefore, an exhaust valve hole 104 is provided on the housing 1, and the exhaust valve hole 104 can discharge the condensed water in time, thereby extending the service life of the shielding sleeve 10 and making the motor better in a vacuum environment to enhance the adaptability of the motor and improve the power output.

[0037] The shielding sleeve 10 includes a fixed portion 10a and a cylindrical portion 10b which are fixedly connected. The fixed portion 10a is located at one end of the cylindrical portion 10b and is sealed and fixed to the upper cover 2. The cylindrical portion 10b passes between the stator 7 and the rotor 8 and is sealed and fixed to the lower cover 3. The fixed portion 10a and the cylindrical portion 10b of the shielding sleeve 10 can be welded or screwed, or can be integrally formed. The shielding sleeve 10 should be made of a non-magnetic and non-rusting material.

[0038] The upper cover 2 also includes an integrally formed top wall 2a, and a coaxial positioning ring 1 201 and a positioning ring 202 protrude downward from the lower end surface of the top wall 2a, the lower end surface of the positioning ring 1 201 is higher than the lower end surface of the positioning ring 202, the fixed portion 10a has an annular groove 1001 coaxial with the cylindrical portion 10b, the outer circumferential surface of the annular groove 1001 abuts against the outer circumferential surface of the positioning ring 1 201 and makes the upper end surface of the fixed portion 10a abut against the lower end surface of the positioning ring 202, a sealing groove 2002 is provided at the position where the fixed portion 10a abuts against the positioning ring 202, a sealing member 2 is provided in the sealing groove 2002, and the fixed portion 10a and the top wall 2a are fixed by a fastener 3. The upper cover 2 may also include an integrally formed flange, side walls and a top wall 2a, the flange and the top wall 2a being located on both sides of the side wall, a sealing groove 1 being provided between the flange and the side wall, the flange being fixedly connected to the vacuum pump so that the inside of the shielding sleeve 10 is sealed with the inside of the vacuum pump to form an integrated vacuum environment, and in order to make the shielding sleeve 10 and the rotating shaft 9 of the rotor 8 have better coaxiality, a positioning ring 1 201 and an annular groove 1001 are provided to cooperate with a fastener 3 to fix the shielding sleeve 10 on the positioning ring 2 202, so that the shielding sleeve 10 can be better fixed between the rotor 8 and the stator 7 and isolate the vacuum chamber 11 and the air chamber 12.

[0039] The lower cover 3 has an annular boss 2 3a, and a fixed annular ring 1003 is arranged on the inner side of the lower end of the cylindrical part 10b. The inner side surface of the fixed annular ring 1003 abuts against the outer side surface of the annular boss 2 3a. The outer peripheral surface of the annular boss 2 3a is provided with a sealing groove 302 relative to the fixed annular ring 1003, and a sealing member 3 is arranged in the sealing groove 302. The inner side surface of the fixed annular ring 1003 abuts against the outer side surface of the annular groove 1001 and the outer peripheral surface of the positioning annular ring 1 201 to form a fixed mode at both ends, so that the shielding sleeve 10 is better coaxial with the rotating shaft 9, so that the rotating shaft 9 drives the rotor 8 to rotate better, and the shielding sleeve 10 is better fixed between the rotor 8 and the stator 7 and isolates the vacuum chamber 11 and the air chamber 12. When the motor fails, the stator 7 can be taken out for maintenance by simply disassembling the lower cover 3 and the housing 1, and installation and maintenance are relatively convenient.

[0040] The rotating shaft 9 includes, in sequence, an integrally formed connecting section 1 901, a cover plate 1 902, a fixing section 903, a cover plate 2 904 and a connecting section 2 905. The upper cover 2 has an annular boss 1 2b, and the lower cover 3 has an annular boss 2 3a. The annular boss 1 2b and the annular boss 2 3a are arranged relatively to each other and are both located in the vacuum chamber 11. The annular boss 1 2b has an installation groove 1 203, in which a bearing 13 is installed. The annular boss 2 3a has an installation groove 2 301, in which a bearing 14 is installed. After the connecting section 1 901 is connected to the bearing 13, it extends out of the upper cover 2, the cover plate 1 902 abuts and covers the bearing 13, the fixing section 903 is fixed to the rotor 8, the connecting section 2 905 is connected to the bearing 2 14, and the cover plate 2 904 abuts and covers the bearing 2 14. Since the air in the vacuum chamber 11 needs to be evacuated to form a vacuum environment, it is easy to draw out the bearing oil in the second bearing 14 and the first bearing 13 when evacuating the vacuum, and the bearing oil will enter the rotor 8, which will seriously affect the rotation of the rotor 8. Therefore, the cover plate 1 902 covers the first bearing 13, and the cover plate 2 904 covers the second bearing 14 to prevent the bearing oil from being drawn out.

[0041] A step hole groove 205 is arranged in the mounting groove 203, and the inner diameter of the step hole groove 205 is smaller than the inner diameter of the mounting groove 203. The outer ring of the bearing 13 abuts on the step surface of the step hole groove 205. A positioning ring 9021 protrudes from the end of the cover plate 902 close to the bearing 13, and the positioning ring 9021 abuts on the inner ring of the bearing 13. The outer diameter of the cover plate 902 is the same as the diameter of the mounting groove 203. An annular exhaust groove 204 is arranged at the end of the mounting groove 203 close to the cover plate 902.

[0042] The cooperation between the positioning ring 9021 and the step hole groove 205 can not only fix the bearing 13 to ensure the normal rotation of the bearing 13, but also form a gap between the bearing 13 and the cover plate 902, and the gap is connected to the exhaust groove 204. This arrangement can prevent the bearing oil from being sucked away and can better extract the air in the installation groove 203.

[0043] The second step hole groove 304 is arranged in the second installation groove 301, and the inner diameter of the second step hole groove 304 is smaller than the inner diameter of the second installation groove 301. The outer ring of the second bearing 14 abuts on the step surface of the second step hole groove 304. The second end of the cover plate 904 close to the second bearing 14 protrudes with a positioning ring 9041, and the positioning ring 9041 abuts on the inner ring of the second bearing 14. The outer diameter of the second cover plate 904 is the same as the diameter of the second installation groove 301. The second cover plate 904 is located in the second installation groove 301. The second installation groove 301 is provided with an annular exhaust groove 305 at a position relative to the second cover plate 904. The diameter of the exhaust groove 305 is larger than the diameter of the second installation groove 301. Such a setting can prevent the bearing oil from being sucked away and can better extract the air in the second installation groove 301, so that the motor is better in a vacuum environment to enhance the adaptability of the motor and improve the power output.

[0044] The above embodiments are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope defined by the claims of the present invention.

Claims

1. A water-cooling casing, comprising a casing (1), an upper cover (2) and a lower cover (3), wherein the upper cover (2) and the lower cover (3) are respectively detachably fixedly arranged at two ends of the axial direction of the casing (1), characterized in that: It also comprises a stainless steel pipe (5) and a fixed cylinder (6), wherein the stainless steel pipe (5) is fixedly arranged on the outer peripheral surface of the fixed cylinder (6), the stainless steel pipe (5) and the fixed cylinder (6) are integrally formed with the shell (1), and a water inlet (101) and a water outlet (102) are arranged on the outer peripheral surface of the shell (1), and two ports of the stainless steel pipe (5) extend out of the water inlet (101) and the water outlet (102) respectively.

2. The water-cooling housing according to claim 1, characterized in that: The stainless steel pipe (5) is welded and fixedly arranged on the outer circumference of the fixed cylinder (6) in a spiral shape, and the shell (1) is integrally formed with the stainless steel pipe (5) and the fixed cylinder (6) by casting, and the inner circumference of the fixed cylinder (6) protrudes inwardly from the inner circumference of the shell (1).

3. A water-cooling casing according to claim 1 or 2, characterized in that: The shell (1) comprises an upper connecting portion (1a), a water cooling portion (1b) and a lower connecting portion (1c); the stainless steel pipe (5) is located in the water cooling portion (1b); a plurality of heat dissipation grooves (103) are provided on the outer peripheral surface of the water cooling portion (1b); the upper cover (2) is fixedly connected to the upper connecting portion (1a) via a fixing member 1; and the lower cover (3) is fixedly connected to the lower connecting portion (1c) via a fixing member 2.

4. A motor, comprising a water-cooled housing according to any one of claims 1 to 3, a stator (7), a rotor (8) and a rotating shaft (9) fixed to each other, characterized in that: A shielding sleeve (10) is sealed and fixedly arranged between the upper cover (2) and the lower cover (3), and the shielding sleeve (10) divides the interior of the water-cooling casing into a vacuum chamber (11) and an air chamber (12) that are not connected to each other. The rotor (8) and the rotating shaft (9) are located in the vacuum chamber (11), and the rotating shaft (9) is supported by bearings on the upper cover (2) and the lower cover (3), respectively. The stator (7) is located in the air chamber (12), and the casing (1) is also provided with an exhaust valve hole (104), and the exhaust valve hole (104) is connected to the air chamber (12).

5. The motor according to claim 4, characterized in that: The shielding sleeve (10) comprises a fixed portion (10a) and a cylindrical portion (10b) which are fixedly connected, the fixed portion (10a) being located at one end of the cylindrical portion (10b) and being sealed and fixed to the upper cover (2), and the cylindrical portion (10b) passing between the stator (7) and the rotor (8) and being sealed and fixed to the lower cover (3).

6. The motor according to claim 5, characterized in that: The upper cover (2) also includes an integrally formed top wall (2a), the lower end surface of the top wall (2a) protruding downwardly with a coaxial positioning ring 1 (201) and a coaxial positioning ring 2 (202), the lower end surface of the positioning ring 1 (201) being higher than the lower end surface of the positioning ring 2 (202), the fixed portion (10a) having an annular groove (1001) coaxial with the cylindrical portion (10b), the outer circumferential surface of the annular groove (1001) abutting against the outer circumferential surface of the positioning ring 1 (201) and making the upper end surface of the fixed portion (10a) abut against the lower end surface of the positioning ring 2 (202), a sealing groove 2 (1002) being provided at the position where the fixed portion (10a) abuts against the positioning ring 2 (202), a sealing member 2 being provided in the sealing groove 2 (1002), and the fixed portion (10a) and the top wall (2a) being fixed by a fastener 3.

7. The motor according to claim 5, characterized in that: The lower cover (3) has an annular boss 2 (3a), a fixed annular ring (1003) is arranged on the inner side of the lower end of the cylindrical portion (10b), the inner side surface of the fixed annular ring (1003) abuts against the outer side surface of the annular boss 2 (3a), and a sealing groove 3 (302) is arranged on the outer peripheral surface of the annular boss 2 (3a) relative to the fixed annular ring (1003), and a sealing member 3 is arranged in the sealing groove 3 (302).

8. The motor according to claim 4, characterized in that: The rotating shaft (9) comprises, in sequence, an integrally formed connecting section 1 (901), a cover plate 1 (902), a fixing section (903), a cover plate 2 (904) and a connecting section 2 (905); the upper cover (2) has an annular boss 1 (2b); the lower cover (3) has an annular boss 2 (3a); the annular boss 1 (2b) and the annular boss 2 (3a) are arranged relative to each other and are both located in the vacuum chamber (11); the annular boss 1 (2b) has an installation groove 1 (203); the installation groove 1 (203 ) is installed with a bearing 1 (13), the annular boss 2 (3a) has a mounting groove 2 (301), the mounting groove 2 (301) is installed with a bearing 2 (14), the connecting section 1 (901) is connected to the bearing 1 (13) and extends out of the upper cover (2), the cover plate 1 (902) abuts and covers the bearing 1 (13), the fixing section (903) is fixed to the rotor (8), the connecting section 2 (905) is connected to the bearing 2 (14), and the cover plate 2 (904) abuts and covers the bearing 2 (14).

9. The motor according to claim 8, characterized in that: A step hole groove (205) is arranged in the installation groove (203), the inner diameter of the step hole groove (205) is smaller than the inner diameter of the installation groove (203), the outer ring of the bearing (13) abuts against the step surface of the step hole groove (205), a positioning ring (9021) protrudes from one end of the cover plate (902) close to the bearing (13), the positioning ring (9021) abuts against the inner ring of the bearing (13), the outer diameter of the cover plate (902) is the same as the diameter of the installation groove (203), and an annular exhaust groove (204) is arranged at one end of the installation groove (203) close to the cover plate (902).

10. The motor according to claim 8, characterized in that: The second mounting groove (301) is provided with a second step hole groove (304), the inner diameter of the second step hole groove (304) is smaller than the inner diameter of the second mounting groove (301), the outer ring of the second bearing (14) abuts against the step surface of the second step hole groove (304), the second cover plate (904) protrudes with a second positioning ring (9041) at one end close to the second bearing (14), the second positioning ring (9041) abuts against the inner ring of the second bearing (14), the outer diameter of the second cover plate (904) is the same as the diameter of the second mounting groove (301), the second cover plate (904) is located in the second mounting groove (301), the second mounting groove (301) is provided with a second annular exhaust groove (305) at a position relative to the second cover plate (904), the diameter of the second exhaust groove (305) is larger than the diameter of the second mounting groove (301).

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