Casing with cooling performance, motor and compressor

Abstract

The utility model provides a casing with cooling performance, a motor and a compressor, a cooling water flow channel is arranged between the inner wall and the outer wall of the casing, the cooling water flow channel comprises a first circumferential water flow channel, a first connecting water flow channel and a second circumferential water flow channel, the first circumferential water flow channel extends along the first circumferential direction of the casing along the water flow direction, and the second connecting water flow channel extends along the second circumferential direction of the casing along the water flow direction. The second circumferential water flow channel extends in the second circumferential direction of the machine shell in the water flow direction, the first circumferential direction is opposite to the second circumferential direction, and the first circumferential water flow channel and the second circumferential water flow channel are located at different positions in the axial direction of the machine shell. The first circumferential water flow channel, the first connecting water flow channel and the second circumferential water flow channel are sequentially communicated to form a water path allowing water to flow. According to the utility model, a circumferential reciprocating and axial superposition type water flow channel can be formed, the contact area between cooling water and the casing is increased, and the cooling efficiency of the motor can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, and particularly relates to a casing, a motor and a compressor with cooling performance. Background Art

[0002] Gas dynamic pressure bearings have the advantages of high precision, pollution-free, high speed and simple structure, and gas dynamic pressure bearings have been widely used in high-speed rotating machinery such as oil-free turbines of aero-engines, cryogenic expanders and air cycle machines of airplanes.

[0003] High-speed motors have a high thermal density. Insufficient cooling will lead to a reduction in the reliability of the motors. In severe cases, it will cause serious problems such as rotor demagnetization, shafting rubbing and motor insulation failure. Therefore, it is necessary to study a new cooling structure for high-speed motors.

[0004] In the prior art, there is a housing assembly of a two-stage air suspension centrifugal direct-drive air compressor. The cooling water flow channel and the cold air flow channel are arranged in the housing wall. The cooling water joint and the cold air joint penetrate through the housing and lead to the inner cavity of the housing to realize double cooling of the housing and the inside of the motor. However, the air duct is arranged below the water duct, resulting in a large wall thickness of the housing, increasing the overall mass and volume of the machine.

[0005] In the prior art, there is a cooling system for a two-stage air suspension centrifugal permanent magnet motor direct-drive air compressor, which is provided with an air cooling device and a liquid cooling device. The air cooling joint is communicated with the inner cavity of the housing to realize cooling of the motor housing and internal components. This patent mainly describes the arrangement of the internal cooling air flow channel and lacks the cooperative design of the water channel and the air duct.

[0006] In the existing implementation modes of the overall water and air cooling structure of the machine, the gas flow channel in the motor cavity is often carefully described while ignoring the cooling water flow channel. By increasing the housing thickness or reducing the water channel area to meet the air cooling flow channel design, the overall cooling efficiency of the machine is reduced, which has always been a technical problem that needs to be solved by those skilled in the art.

[0007] Due to the technical problems such as high temperature rise during operation and insufficient heat dissipation performance in the motors of the prior art, the utility model researches and designs a casing, a motor and a compressor with cooling performance. Content of the Utility Model

[0008] Therefore, the technical problem to be solved by the utility model is to overcome the defects of high temperature rise during operation and insufficient heat dissipation performance in the motors of the prior art, so as to provide a casing, a motor and a compressor with high cooling performance.

[0009] To solve the above problems, the utility model provides a casing with cooling performance, wherein:

[0010] A cooling water flow channel is provided between the inner wall and the outer wall of the housing. The cooling water flow channel includes a first circumferential water flow channel, a first connecting water flow channel, and a second circumferential water flow channel. Along the direction of the water flow, the first circumferential water flow channel extends along the first circumferential direction of the housing, and along the direction of the water flow, the second circumferential water flow channel extends along the second circumferential direction of the housing. In the projection plane of the axial end face of the housing, the first circumferential direction is opposite to the second circumferential direction, and the first circumferential water flow channel and the second circumferential water flow channel are located at different positions in the axial direction of the housing. One end of the first connecting water flow channel communicates with one end of the first circumferential water flow channel, and the other end of the first connecting water flow channel communicates with one end of the second circumferential water flow channel, so that the first circumferential water flow channel, the first connecting water flow channel, and the second circumferential water flow channel are sequentially connected to form a water path allowing water to flow through.

[0011] In some embodiments,

[0012] The first circumferential water flow channel, the first connecting water flow channel, and the second circumferential water flow channel form a set of water flow channel units, and there are at least two sets of the water flow channel units. The at least two sets of water flow channel units are arranged along the axial direction of the housing, and adjacent two sets of water flow channel units are communicated through a second connecting water flow channel.

[0013] In some embodiments,

[0014] The distribution angle range of the first circumferential water flow channel in the circumferential direction of the housing is greater than 180° and less than 360°, so that the first circumferential water flow channel forms a non-connected part in the circumferential direction. The distribution angle range of the second circumferential water flow channel in the circumferential direction of the housing is greater than 180° and less than 360°, so that the second circumferential water flow channel forms a non-connected part in the circumferential direction. And in the projection plane of the axial end face of the housing, at least part of the non-connected part formed by the first circumferential water flow channel overlaps with the non-connected part formed by the second circumferential water flow channel, forming the non-connected part of the cooling water flow channel in the circumferential direction.

[0015] In some embodiments,

[0016] The distribution angle range of the first circumferential water flow channel in the circumferential direction of the housing is 300° - 350°, and the distribution angle range of the second circumferential water flow channel in the circumferential direction of the housing is 300° - 350°. The cross-section of the cooling water flow channel is a rectangular structure. The rectangle includes adjacent first side and second side, where the length of the first side is a and the length of the second side is b, and a / b = 0.5 - 1.

[0017] In some embodiments,

[0018] In the projection plane of the axial end face of the casing, the first circumferential water flow channel is in an arc structure, and the radian range of the first circumferential water flow channel is greater than 180° and less than 360°. The second circumferential water flow channel is in an arc structure, and the radian range of the second circumferential water flow channel is greater than 180° and less than 360°.

[0019] In some embodiments,

[0020] The casing is a cylindrical structure with a central axis. The center of the first circumferential water flow channel is located on the central axis of the casing, and the center of the second circumferential water flow channel is also located on the central axis of the casing; and / or,

[0021] In the projection plane of the plane passing through the central axis of the casing, the first circumferential water flow channel is a straight channel structure, the second circumferential water flow channel is also a straight channel structure, the first connecting water flow channel is the flow channel of a U-shaped pipe, and the second connecting water flow channel is also the flow channel of a U-shaped pipe.

[0022] In some embodiments,

[0023] The casing is also provided with a water cooling inlet and a water cooling outlet. One end of the water flow channel unit at one axial end is communicated with the water cooling inlet, and one end of the water flow channel unit at the other axial end is communicated with the water cooling outlet.

[0024] In some embodiments,

[0025] The water cooling inlet is arranged on the outer wall at the uppermost end of the casing. The water cooling outlet is arranged opposite to the water cooling inlet in the axial direction of the casing, and the axial distance between the water cooling inlet and the axial end face of the casing is less than a first preset distance, and the axial distance between the water cooling outlet and the axial end face of the other end of the casing is less than a second preset distance.

[0026] In some embodiments,

[0027] A cooling air flow channel is also arranged between the inner wall and the outer wall of the casing. The cooling air flow channel is not communicated with the cooling water flow channel, and in the projection plane of the axial end face of the casing, the cooling air flow channel and the cooling water flow channel do not overlap, forming a structure in which the cooling air flow channel and the cooling water flow channel are staggered with each other in the circumferential direction.

[0028] In some embodiments,

[0029] When there is a non-connected part in the circumferential direction of the cooling water flow channel, the cooling air flow channel is arranged at the position of the non-connected part in the circumferential direction of the cooling water flow channel.

[0030] In some embodiments,

[0031] The cooling air flow channel includes a first air channel and a second air channel that are spaced apart in the radial direction of the housing. The first air channel extends along the axial direction of the housing, and the second air channel also extends along the axial direction of the housing. The first air channel and the second air channel are connected through a connecting air channel.

[0032] In some embodiments,

[0033] An air cooling inlet is provided on the outer wall of the housing. The air cooling inlet is connected to one end of the first air channel. The first air channel extends axially and is connected to one axial end of the second air channel through the connecting air channel at its axial end. A first air guiding through hole is provided at one axial end of the housing. The first air guiding through hole is connected to one axial end of the second air channel to introduce gas to one axial end inside the housing. A second air guiding through hole is provided at the other axial end of the housing. The second air guiding through hole is connected to the other axial end of the second air channel to introduce gas to the other axial end inside the housing.

[0034] The present utility model also provides a motor, which includes the aforementioned housing with cooling performance.

[0035] In some embodiments,

[0036] When a water cooling inlet and a water cooling outlet are further provided on the housing, the motor further includes a stator. The water cooling inlet is disposed opposite to the outgoing line side of the stator in the radial direction of the housing.

[0037] The present utility model also provides a compressor, which includes the aforementioned motor.

[0038] A housing, a motor, and a compressor with cooling performance provided by the present utility model have the following beneficial effects:

[0039] 1. By providing a cooling water flow channel between the inner and outer walls of the housing, and the cooling water flow channel includes a first circumferential water flow channel, a first connecting water flow channel, and a second circumferential water flow channel. The first circumferential water flow channel extends along a first circumferential direction, while the second circumferential water flow channel extends along a second circumferential direction opposite to the first circumferential direction, and the first and second circumferential water flow channels are located at different positions in the axial direction. Thus, the cooling water flow channel is formed into a water flow channel that reciprocates circumferentially back and forth and advances axially. After the water cools and dissipates heat from the inside of the housing along the first circumferential direction in the first circumferential water flow channel, it travels axially to the second circumferential water flow channel and cools and dissipates heat from the inside of the housing along the second circumferential direction, greatly increasing the contact area between the cooling water and the housing, improving the heat exchange efficiency between the housing and the components inside the housing, being able to improve the cooling efficiency of the motor, and avoiding the situation of excessive temperature rise and decreased heat dissipation performance during the operation of the motor.

[0040] 2. The utility model also forms a non-connected portion of the cooling water flow channel in the circumferential direction through a circumferentially reciprocating and axially stacked cooling water flow channel, and the cooling air flow channel is arranged on the casing at the non-connected portion of the cooling water flow channel, so that the water channel and the air channel do not overlap in the circumferential direction of the casing, while increasing the contact and heat dissipation area with the casing through the cooling water flow channel, while also ensuring the purpose and effect of the cooling air flow channel on ventilation and heat dissipation inside the casing, and the casing is the same thickness as the casing of the single water cooling, which is much smaller than the casing of the water-air mixed cooling in the prior art, and while reducing the casing thickness, the cooling and heat dissipation performance is also improved;

[0041] The circumferential reciprocating axially progressive cooling water flow channel of the utility model staggers the cooling water flow channel in the circumferential direction of the casing. Compared with the traditional spiral water channel, the cooling water flow channel is almost fully in contact with the casing in the axial and circumferential directions, and the heat exchange with the stator in the casing is uniform, avoiding the problem of abnormal failure of the motor due to low heat exchange efficiency and high temperature rise in local areas of the stator and the glue-filled wire package due to being far away from the water channel, thereby improving the reliability and service life of the whole machine.

[0042] 3. The utility model further arranges the cooling air flow channel as the first and second air channels arranged at intervals in the radial direction, so that radial bidirectional axial cooling air flow channels can be formed at the circumferential intervals of the casing water channel, so that the gas enters the casing and is cooled by the water channel before entering the motor cavity to cool the stator, rotor, bearings and other key components, further improving the cooling and heat dissipation effect on the inside of the motor, and the multiple gas cooling flow channels arranged in the radial direction reduce the arrangement space of the cooling air flow channels in the circumferential direction of the casing, increase the heat exchange area between the high-pressure gas and the casing cooling water, improve the air cooling efficiency, and further improve the cooling and heat dissipation effect on the inside of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 It is a longitudinal cross-sectional structural diagram of the motor of the utility model;

[0044] Figure 2 It is a cross-sectional structural diagram of the gas-liquid mixed cooling machine (such as a compressor) of the utility model;

[0045] Figure 3 It is an external structural diagram of the motor of the utility model (preferably a top view of the upper end of the motor);

[0046] Figure 4 It is a top view of the internal waterway of the motor of the utility model;

[0047] Figure 5 yes Figure 4 Left side view of .

[0048] The reference numerals are:

[0049] 1. Housing; 2. Stator; 3. High-speed rotor; 4. First radial bearing housing; 5. Second radial bearing housing; 6. First radial bearing; 7. Second radial bearing; 8. First diffuser; 9. Second diffuser; 10. Front axial bearing; 11. Rear axial bearing; 12. Thrust disk; 13. Cooling water flow path;

[0050] 14. First impeller; 15. Second impeller; 16. First volute; 17. Second volute; 18. Connecting pipe; 19. Compressed gas outlet; 20. Air-cooling inlet; 21. Cooling air flow path; 211. First air passage; 212. Second air passage; 213. Communicating air passage; 22. First air guiding through hole; 23. Second air guiding through hole; 24. Air-cooling outlet; 25. Water-cooling inlet; 26. Water-cooling outlet;

[0051] 27. First circumferential water flow path; 28. First connecting water flow path; 29. Second circumferential water flow path; 30. Second connecting water flow path. Detailed implementation manners

[0052] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and in no way limits the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0053] It should be noted that the terms used herein are only for describing specific implementation manners and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0054] Unless otherwise specifically stated, the relative arrangements, numerical expressions, and numerical values of the components and steps set forth in these embodiments do not limit the scope of the present invention. At the same time, it should be understood that for ease of description, the dimensions of the various parts shown in the drawings are not drawn in actual proportional relationships. Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, such technologies, methods, and devices should be regarded as part of the authorization specification. In all the examples shown and discussed here, any specific value should be construed as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that like reference numerals and letters denote like items in the following drawings, and thus, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0055] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by orientation terms such as "front, rear, upper, lower, left, right", "lateral, vertical, perpendicular, horizontal", and "top, bottom" are generally based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description. Without contrary statements, these orientation terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and thus should not be construed as limiting the protection scope of the present invention; the orientation terms "inside, outside" refer to the inside and outside relative to the contour of each component itself.

[0056] For ease of description, spatial relative terms such as "above...", "over...", "on the upper surface of...", "above" can be used here to describe the spatial positional relationships of one device or feature to other devices or features as shown in the drawings. It should be understood that the spatial relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the drawings. For example, if the device in the drawing is inverted, the device described as "above other devices or structures" or "over other devices or structures" will then be positioned "below other devices or structures" or "under other devices or structures". Thus, the exemplary term "above..." can include both the orientations of "above..." and "below...". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and corresponding interpretations should be made for the spatial relative descriptions used here.

[0057] In addition, it should be noted that the use of terms such as "first", "second" to limit components is only for the convenience of differentiating the corresponding components. Without additional statements, the above terms have no special meanings, and thus should not be construed as limiting the protection scope of the present invention.

[0058] AsFigures 1-5 As shown in the figure, the present utility model provides a casing with cooling performance (preferably a motor casing or a casing of a rotating machine, such as a compressor casing, etc.), wherein:

[0059] A cooling water flow channel 13 is provided between the inner wall and the outer wall of the casing 1. The cooling water flow channel 13 includes a first circumferential water flow channel 27, a first connecting water flow channel 28, and a second circumferential water flow channel 29. Along the direction of the water flow, the first circumferential water flow channel 27 extends along the first circumferential direction of the casing 1, and along the direction of the water flow, the second circumferential water flow channel 29 extends along the second circumferential direction of the casing 1. In the projection plane of the axial end face of the casing 1, the first circumferential direction is opposite to the second circumferential direction, and the first circumferential water flow channel 27 and the second circumferential water flow channel 29 are located at different positions in the axial direction of the casing 1. One end of the first connecting water flow channel 28 is communicated with one end of the first circumferential water flow channel 27, and the other end of the first connecting water flow channel 28 is communicated with one end of the second circumferential water flow channel 29, so that the first circumferential water flow channel 27, the first connecting water flow channel 28, and the second circumferential water flow channel 29 are sequentially communicated to form a waterway allowing water to flow through.

[0060] By providing a cooling water flow channel between the inner and outer walls of the casing in the present utility model, and the cooling water flow channel includes a first circumferential water flow channel, a first connecting water flow channel, and a second circumferential water flow channel. The first circumferential water flow channel extends along the first circumferential direction, while the second circumferential water flow channel extends along the second circumferential direction opposite to the first circumferential direction, and the first and second circumferential water flow channels are located at different positions in the axial direction, so that the cooling water flow channel is formed into a circumferential reciprocating and axially progressive water flow channel. After the water cools and dissipates heat from the inside of the casing along the first circumferential direction in the first circumferential water flow channel, it travels axially to the second circumferential water flow channel and cools and dissipates heat from the inside of the casing along the second circumferential direction, greatly increasing the contact area between the cooling water and the casing, improving the heat exchange efficiency between the casing and the internal components of the casing, being able to improve the cooling efficiency of the motor, and avoiding the situation of excessive temperature rise and decreased heat dissipation performance during the operation of the motor.

[0061] In some embodiments,

[0062] The first circumferential water flow channel 27, the first connecting water flow channel 28, and the second circumferential water flow channel 29 form a set of water flow channel units, and there are at least two sets of the water flow channel units. The at least two sets of water flow channel units are arranged along the axial direction of the casing 1, and adjacent two sets of water flow channel units are communicated through a second connecting water flow channel 30.

[0063] This is a further preferred structural form of the cooling water flow channel of the present utility model, that is, the first and second circumferential water flow channels and the first connecting water flow channel connected between the two form a set of water flow channel units. By arranging multiple sets of water flow channel units in the axial direction, the water flow path can be further lengthened, the contact area between the cooling water and the casing can be further increased, the cooling and heat dissipation area can be further enlarged, and the cooling and heat dissipation effect and heat dissipation performance of the motor can be further improved; the second connecting water flow channel is used to connect adjacent two sets of water flow channel units.

[0064] The casing 1 of the present utility model is provided with a cooling water flow channel 13, as Figure 3 and Figure 4 shown. The cooling water flow channel 13 includes a water cooling inlet 25, a water cooling first straight channel (the first circumferential water flow channel 27), a water cooling first U-shaped channel (the first connecting water flow channel 28), a water cooling second straight channel (the second circumferential water flow channel 29), a water cooling second U-shaped channel (the second connecting water flow channel 30), and a water cooling outlet 26. Cooling water enters the first circumferential water flow channel 27 inside the casing from the water cooling inlet 25, enters the first connecting water flow channel 28 along the first rotation direction around the circumferential direction of the casing at a large angle, the cooling water flows through the second circumferential water flow channel 29 from the first connecting water flow channel 28 and enters the second connecting water flow channel 30 along the second rotation direction around the circumferential direction of the casing at the same angle, and flows out of the casing from the water cooling outlet 26 along the reciprocating axial overlapping water channels in the circumferential direction. The first rotation direction and the second rotation direction are opposite.

[0065] In some embodiments,

[0066] The distribution angle range of the first circumferential water flow channel 27 in the circumferential direction of the casing 1 is greater than 180° and less than 360°, so that the first circumferential water flow channel 27 forms a non-connected part in the circumferential direction. The distribution angle range of the second circumferential water flow channel 29 in the circumferential direction of the casing 1 is greater than 180° and less than 360°, so that the second circumferential water flow channel 29 forms a non-connected part in the circumferential direction. And in the projection plane of the axial end face of the casing 1, at least part of the non-connected part formed by the first circumferential water flow channel 27 overlaps with the non-connected part formed by the second circumferential water flow channel 29, forming the non-connected part of the cooling water flow channel 13 in the circumferential direction.

[0067] The present utility model also has a cooling water flow channel that reciprocates circumferentially and advances axially, such that the cooling water flow channel forms non-connected portions in the circumferential direction. The cooling air flow channel is disposed on the casing at positions corresponding to the non-connected portions of the cooling water flow channel, so that the water channel and the air channel do not overlap in the circumferential direction of the casing. While increasing the contact heat dissipation area with the casing through the cooling water flow channel, the purpose and effect of ventilating and dissipating heat inside the casing by the cooling air flow channel are ensured. Moreover, the thickness of the casing of the present utility model is the same as that of a single water-cooled casing, and is greatly reduced compared to the thickness of the water-gas mixed cooling casing in the prior art. While reducing the thickness of the casing, the cooling and heat dissipation performance is improved.

[0068] In some embodiments,

[0069] The distribution angle range of the first circumferential water flow channel 27 in the circumferential direction of the casing 1 is 300° - 350°, and the distribution angle range of the second circumferential water flow channel 29 in the circumferential direction of the casing 1 is 300° - 350°; the cross-section of the flow channel of the cooling water flow channel 13 is a rectangular structure, the rectangle includes an adjacent first side and a second side, where the length of the first side is a and the length of the second side is b, and a / b = 0.5 - 1.

[0070] The present utility model further sets the distribution angle range of the first and second circumferential water flow channels in the circumferential direction of the casing to be 300° - 350°, which can further increase the extension length of the first and second circumferential water flow channels in the circumferential direction, further increase the contact area and the cooling and heat dissipation area between the cooling water and the casing, and further improve the cooling and heat dissipation effect and the heat dissipation performance of the motor. When the length of the cooling water flow channel is set as b and the width is set as a, and the value of the aspect ratio a / b is between 0.5 and 1, the flow resistance under this ratio condition is relatively small and the heat transfer efficiency is relatively high.

[0071] In some embodiments,

[0072] In the projection plane of the axial end face of the casing 1, the first circumferential water flow channel 27 is in an arc structure, and the radian range of the first circumferential water flow channel 27 is greater than 180° and less than 360°. The second circumferential water flow channel 29 is in an arc structure, and the radian range of the second circumferential water flow channel 29 is greater than 180° and less than 360°.

[0073] This is the preferred structural form of the first and second circumferential water flow channels of the present utility model, that is, they are both in the structural form of arc-shaped flow channels, and the radian ranges are both greater than 180° and less than 360°. It can increase the distribution length and distribution area in the circumferential direction as much as possible, increase the contact area and the heat dissipation area with the casing, improve the cooling and heat dissipation effect, and less than 360° can form non-connected portions, facilitating the setting of the cooling air flow channel, being able to ensure the gas cooling effect while increasing the water cooling effect, and not increasing the volume of the casing.

[0074] In some embodiments,

[0075] The housing 1 is a cylindrical structure with a central axis. The center of the first circumferential water flow channel 27 is located on the central axis of the housing 1, and the center of the second circumferential water flow channel 29 is also located on the central axis of the housing 1; and / or,

[0076] In the projection plane of the plane passing through the central axis of the housing 1, the first circumferential water flow channel 27 is a straight channel structure, the second circumferential water flow channel 29 is also a straight channel structure, the first connecting water flow channel 28 is a channel of a U-shaped pipe, and the second connecting water flow channel 30 is also a channel of a U-shaped pipe.

[0077] The housing of the present utility model is preferably a cylindrical structure with a central axis. The centers of the first and second circumferential water flow channels are both located on the central axis of the housing, which can form a structure with as symmetrical a distribution as possible, facilitating processing and improving the uniformity of cooling and heat dissipation; in the top view structure or in the projection plane of the horizontal plane of the first and second circumferential water flow channels of the present utility model, they are straight channel structures (in the three-dimensional structure, they are curved channels extending along the circumference), while the first and second connecting water flow channels are both preferably channels of U-shaped pipes extending in the axial direction and connecting the first and second circumferential water flow channels, ensuring the smoothness of the water path and ensuring the continuous and effective progress of the cooling effect.

[0078] In some embodiments,

[0079] The housing 1 is further provided with a water cooling inlet 25 and a water cooling outlet 26. One end of the water flow channel unit at one axial end is communicated with the water cooling inlet 25, and one end of the water flow channel unit at the other axial end is communicated with the water cooling outlet 26.

[0080] The present utility model further enables a cooling fluid, preferably water, to be introduced into the water flow channel unit inside the housing through the setting of the water cooling inlet. After cooling and heat exchange in multiple water flow channel units inside the housing, the fluid with an increased temperature is discharged from the water cooling outlet.

[0081] In some embodiments,

[0082] The water cooling inlet 25 is arranged on the outer wall of the uppermost end of the housing 1. The water cooling outlet 26 is arranged opposite to the water cooling inlet 25 in the axial direction of the housing 1. Moreover, the axial distance between the water cooling inlet 25 and one axial end face of the housing 1 is less than a first preset distance, and the axial distance between the water cooling outlet 26 and the other axial end face of the housing 1 is less than a second preset distance.

[0083] In this utility model, by arranging the water-cooling inlet at the uppermost end of the casing, the gravity of water can be effectively utilized to make it flow from top to bottom. The water-cooling outlet is arranged axially opposite to the water-cooling inlet, which is convenient for processing and can also increase the distribution area of the cooling water flow channel, further improving the cooling effect. The water-cooling inlet and outlet of this utility model are preferably distributed at the two end faces in the axial direction of the casing or positions close to the two end faces, which can maximize the length of the cooling water flow channel distributed in the axial direction, further increasing the contact area and heat dissipation area between the cooling water and the casing, and further improving the cooling effect and cooling performance of the motor.

[0084] The cooling water flow channel of this utility model is preferably arranged above the motor in the circumferential direction to reduce flow resistance. The water-cooling outlet 26 is preferably arranged in the same axial direction as the water-cooling inlet 25 along the casing 1, as close as possible to the end face of the casing 1, increasing the contact area between the cooling water flow channel 13 and the casing, enlarging the heat conduction area, and improving the cooling efficiency of the whole machine.

[0085] In some embodiments,

[0086] A cooling air flow channel 21 is further arranged between the inner wall and the outer wall of the casing 1. The cooling air flow channel 21 is not connected to the cooling water flow channel 13, and in the projection plane of the axial end face of the casing 1, the cooling air flow channel 21 does not overlap with the cooling water flow channel 13, forming a structure in which the cooling air flow channel 21 and the cooling water flow channel 13 are staggered with each other in the circumferential direction.

[0087] The cooling air flow channel of this utility model is arranged at a position circumferentially staggered from the cooling water flow channel on the casing, so that the water channel and the air channel do not overlap in the circumference of the casing. While increasing the contact heat dissipation area with the casing through the cooling water flow channel, it also ensures the purpose and effect of the cooling air flow channel for ventilation and heat dissipation inside the casing. And the thickness of the casing of this utility model is the same as that of the single water-cooled casing, which is greatly reduced compared with the thickness of the water-gas mixed cooling casing in the prior art. While reducing the thickness of the casing, it also improves the cooling and heat dissipation performance. (The cooling water channel preferably cools the motor stator and coil, and the cooling air flow channel preferably cools the bearing and rotor parts).

[0088] The cooling water flow channel 13 of this utility model needs to be staggered from the cooling air flow channel 21 in the circumferential direction of the casing 1, that is, a gas-cooled + liquid-cooled hybrid cooling structure casing is arranged without increasing the thickness of the casing. The cooling air flow channel 21 is an axial air channel arranged in the radial direction, and the required position of the casing is relatively small. Therefore, the angle of the cooling water flow channel 13 in the circumferential direction of the casing is more than 300°. Without affecting the strength of the casing and contacting the cooling air flow channel 21, the larger this angle is, the better.

[0089] The circumferentially reciprocating and axially advancing cooling water flow channel 13 of the present utility model is offset from the cooling air flow channel 21 in the circumferential direction of the housing 1. Compared with the traditional spiral water channel, almost full contact between the cooling water flow channel 13 and the housing 1 is achieved in the axial and circumferential directions, and heat exchange with the stator 2 in the housing 1 is uniform, avoiding the problem that local areas of the stator and the potted wire package have low heat exchange efficiency due to being far from the water channel, resulting in high temperature rise and abnormal failure of the motor, and improving the reliability and service life of the whole machine.

[0090] In some embodiments,

[0091] When there is a non-connected part in the circumferential direction of the cooling water flow channel 13, the cooling air flow channel 21 is arranged at the position of the non-connected part in the circumferential direction of the cooling water flow channel 13.

[0092] The cooling air flow channel of the present utility model is preferably arranged at the position of the non-connected part of the cooling water flow channel on the housing, so that the water channel and the air channel do not overlap in the circumferential direction of the housing. While increasing the contact heat dissipation area with the housing through the cooling water flow channel, the purpose and effect of ventilating and dissipating heat of the cooling air flow channel inside the housing are ensured, and the housing has the same thickness as that of a single water-cooled housing, and is greatly reduced compared with the thickness of the water-gas mixed cooling housing in the prior art, reducing the housing thickness while improving the cooling and heat dissipation performance.

[0093] In some embodiments,

[0094] The cooling air flow channel 21 includes a first air channel 211 and a second air channel 212 that are spaced apart in the radial direction of the housing 1. The first air channel 211 extends along the axial direction of the housing 1, and the second air channel 212 also extends along the axial direction of the housing 1. The first air channel 211 and the second air channel 212 are connected through a communication air channel 213.

[0095] The present utility model further forms a radial two-way axial cooling air flow channel at the circumferential interval of the housing water channel by setting the cooling air flow channel as the first and second air channels spaced apart in the radial direction, so that the gas enters the housing, is cooled by the water channel and then enters the motor cavity, cooling key components such as the stator, rotor and bearings, further improving the cooling and heat dissipation effect on the inside of the motor. And multiple gas cooling flow channels arranged in the radial direction reduce the layout space of the cooling air flow channel in the circumferential direction of the housing, increase the heat exchange area between the high-pressure gas and the housing cooling water, improve the air-cooling efficiency, and further improve the cooling and heat dissipation effect on the inside of the motor.

[0096] The housing 1 of the present utility model is provided with a cooling air flow channel, such as Figure 3 and Figure 4As shown, the cooling air flow path includes a compressed gas outlet 19, an air cooling inlet 20, a cooling air flow path 21, a first air guiding through hole 22, a second air guiding through hole 23 (preferably an L-shaped air guiding hole), and an air cooling outlet 24. Among them, high-pressure gas enters the casing for cooling through a pipeline from the air cooling inlet 20. The cooled high-pressure gas is divided into two parts at the first air guiding through hole 22. One part of the cooled high-pressure gas flows through the first air guiding through hole 22 and enters the first stage side to cool the front axial bearing 10 and the rear axial bearing 11 of the axial rotation system. The other part of the cooled high-pressure gas then enters the second stage side through the cooling air flow path 21 of the casing and the second air guiding through hole 23 to cool the end cover and the radial bearing on the second stage side. The cooling air flow path 21 is provided with two axial air channels in the radial direction of the casing, reducing the space of the cooling air flow path 21 in the circumferential direction of the casing 1, increasing the heat exchange area between the high-pressure gas and the casing cooling water, and improving the air cooling efficiency.

[0097] In some embodiments,

[0098] An air cooling inlet 20 is provided on the outer wall of the casing 1. The air cooling inlet 20 is communicated with one end of the first air channel 211. The first air channel 211 extends axially and is communicated with one axial end of the second air channel 212 through the communicating air channel 213 at its axial end. A first air guiding through hole 22 is provided at one axial end of the casing 1. The first air guiding through hole 22 is communicated with one axial end of the second air channel 212 to be able to introduce gas to one axial end inside the casing 1. A second air guiding through hole 23 is provided at the other axial end of the casing 1. The second air guiding through hole 23 is communicated with the other axial end of the second air channel 212 to be able to introduce gas to the other axial end inside the casing 1.

[0099] The present utility model can also supply gas to the inside of the casing from both axial ends of the casing through the first air guiding through hole and the second air guiding through hole, further increasing the gas supply amount to the inside of the casing and further improving the cooling and heat dissipation performance of multiple components inside the casing.

[0100] The present utility model also provides a motor, which includes the aforementioned casing with cooling performance.

[0101] The present utility model provides a casing and a motor with air-liquid mixed cooling, such as Figure 1 and Figure 2As shown in the figure, it includes a casing 1, a stator 2, and a high-speed rotor 3. The first-stage radial bearing housing 4 and the second-stage radial bearing housing 5 that support the high-speed rotor 3 are respectively installed inside both ends of the casing 1. The first-stage radial bearing 6 and the second-stage radial bearing 7 are respectively installed on the first-stage radial bearing housing 4 and the second-stage radial bearing housing 5. The first-stage diffuser 8 and the second-stage diffuser 9 are respectively installed on the left and right sides of the outside of the casing 1. The front axial bearing 10 and the rear axial bearing 11 are respectively installed on the first-stage diffuser 8 and the first-stage radial bearing housing 4 on the left and right. The left and right ends of the high-speed rotor 3 respectively pass through the first-stage radial bearing housing 4 and the first-stage diffuser 8, the second-stage radial bearing housing 5 and the second-stage diffuser 9 in sequence, and the first-stage impeller 14 and the second-stage impeller 15 are respectively installed. An interference-fitted thrust disk 12 is arranged on the high-speed rotor 3, and the thrust disk 12 is arranged between the front axial bearing 10 and the rear axial bearing 11. The first-stage volute 16 and the second-stage volute 17 are respectively installed outside the first-stage impeller 14 and the second-stage impeller 15. The first-stage volute 16 and the second-stage volute 17 are connected by a connecting pipe 18. A compressed gas outlet 19 on the connecting pipe 18 passes through a pipeline and a gas cooling inlet 20 and is introduced into the motor cavity after cooling the casing.

[0102] In some embodiments,

[0103] When a water cooling inlet 25 and a water cooling outlet 26 are further provided on the casing 1, the motor further includes a stator 2, and the water cooling inlet 25 is arranged opposite to the outgoing line side of the stator 2 in the radial direction of the casing 1.

[0104] The water cooling inlet 25 of the present utility model is preferably arranged on the outgoing line end side of the stator 2 in the axial direction. It preferentially cools the place where the temperature rise of the stator is higher and then cools the place where the temperature rise of the non-outgoing line end of the stator is lower through the casing, with targeted heat dissipation and cooling, improving the heat dissipation performance of the motor.

[0105] The present utility model further provides a compressor, which includes the aforementioned motor.

[0106] The present utility model provides a casing structure and a motor with gas-liquid hybrid cooling. It designs a circumferentially reciprocating and axially progressive water channel and an axial air channel in the casing to cool the motor. The water channel in the casing is circumferentially reciprocating and axially progressive, and the air channel circulates axially and is introduced into the cavity from both end faces of the casing to cool parts such as the casing, stator, and rotor, improving the heat exchange efficiency of the motor system, enhancing the stability and service life of the whole machine system, being able to solve the problem of high temperature rise of the motor during operation, reducing the temperature rise of the stator, rotor, and key components of the motor without increasing the thickness of the casing, and improving the service life and reliability of the motor.

[0107] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model. The above is only the preferred implementation manner of the present utility model. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the technical principle of the present utility model, several improvements and modifications can still be made, and these improvements and modifications should also be regarded as within the protection scope of the present utility model.

Claims

1. A casing with cooling performance, characterized in that: A cooling water flow channel (13) is provided between the inner wall and the outer wall of the casing (1). The cooling water flow channel (13) includes a first circumferential water flow channel (27), a first connecting water flow channel (28), and a second circumferential water flow channel (29). Along the direction of the water flow, the first circumferential water flow channel (27) extends along the first circumferential direction of the casing (1), and along the direction of the water flow, the second circumferential water flow channel (29) extends along the second circumferential direction of the casing (1). In the projection plane of the axial end face of the casing (1), the first circumferential direction is opposite to the second circumferential direction, and the first circumferential water flow channel (27) and the second circumferential water flow channel (29) are located at different positions in the axial direction of the casing (1). One end of the first connecting water flow channel (28) is communicated with one end of the first circumferential water flow channel (27), and the other end of the first connecting water flow channel (28) is communicated with one end of the second circumferential water flow channel (29), so that the first circumferential water flow channel (27), the first connecting water flow channel (28), and the second circumferential water flow channel (29) are sequentially communicated to form a water path allowing water to flow through.

2. The casing with cooling performance according to claim 1, characterized in that: The first circumferential water flow channel (27), the first connecting water flow channel (28), and the second circumferential water flow channel (29) form a set of water flow channel units, and there are at least two sets of the water flow channel units. The at least two sets of water flow channel units are arranged along the axial direction of the casing (1), and adjacent two sets of water flow channel units are communicated through a second connecting water flow channel (30).

3. The casing with cooling performance according to claim 2, characterized in that: The distribution angle range of the first circumferential water flow channel (27) in the circumferential direction of the casing (1) is greater than 180° and less than 360°, so that the first circumferential water flow channel (27) forms a non-connected part in the circumferential direction. The distribution angle range of the second circumferential water flow channel (29) in the circumferential direction of the casing (1) is greater than 180° and less than 360°, so that the second circumferential water flow channel (29) forms a non-connected part in the circumferential direction. And in the projection plane of the axial end face of the casing (1), at least part of the non-connected part formed by the first circumferential water flow channel (27) overlaps with the non-connected part formed by the second circumferential water flow channel (29), forming the non-connected part of the cooling water flow channel (13) in the circumferential direction.

4. The casing with cooling performance according to claim 3, characterized in that: The distribution angle range of the first circumferential water flow channel (27) in the circumferential direction of the casing (1) is 300° - 350°, and the distribution angle range of the second circumferential water flow channel (29) in the circumferential direction of the casing (1) is 300° - 350°; the cross-section of the flow channel of the cooling water flow channel (13) is a rectangular structure. The rectangle includes adjacent first side and second side, where the length of the first side is a and the length of the second side is b, and a / b = 0.5 - 1.

5. The housing with cooling performance according to claim 3, characterized in that: In the projection plane of the axial end face of the housing (1), the first circumferential water flow channel (27) is in an arc structure, and the radian range of the first circumferential water flow channel (27) is greater than 180° and less than 360°, the second circumferential water flow channel (29) is in an arc structure, and the radian range of the second circumferential water flow channel (29) is greater than 180° and less than 360°.

6. The housing with cooling performance according to claim 5, characterized in that: The housing (1) is a cylindrical structure with a central axis, the center of the first circumferential water flow channel (27) is located on the central axis of the housing (1), and the center of the second circumferential water flow channel (29) is also located on the central axis of the housing (1); and / or, In the projection plane of the plane passing through the central axis of the housing (1), the first circumferential water flow channel (27) is a straight flow channel structure, the second circumferential water flow channel (29) is also a straight flow channel structure, the first connecting water flow channel (28) is the flow channel of a U-shaped tube, and the second connecting water flow channel (30) is also the flow channel of a U-shaped tube.

7. The housing with cooling performance according to claim 2, characterized in that: The housing (1) is further provided with a water cooling inlet (25) and a water cooling outlet (26), one end of the water flow channel unit at one axial end is communicated with the water cooling inlet (25), and one end of the water flow channel unit at the other axial end is communicated with the water cooling outlet (26).

8. The housing with cooling performance according to claim 7, characterized in that: The water cooling inlet (25) is arranged on the outer wall at the uppermost end of the housing (1), the water cooling outlet (26) is oppositely arranged in the axial direction of the housing (1) with respect to the water cooling inlet (25), and the axial distance between the water cooling inlet (25) and the axial end face of the housing (1) is less than a first preset distance, and the axial distance between the water cooling outlet (26) and the axial end face of the housing (1) at the other end is less than a second preset distance.

9. The housing with cooling performance according to any one of claims 1-8, characterized in that: A cooling air flow channel (21) is further arranged between the inner wall and the outer wall of the housing (1), the cooling air flow channel (21) is not communicated with the cooling water flow channel (13), and in the projection plane of the axial end face of the housing (1), the cooling air flow channel (21) and the cooling water flow channel (13) do not overlap, forming a structure in which the cooling air flow channel (21) and the cooling water flow channel (13) are staggered in the circumferential direction.

10. The housing with cooling performance according to claim 9, characterized in that: When there is a non-connected part in the circumferential direction of the cooling water flow channel (13), the cooling air flow channel (21) is arranged at the position of the non-connected part in the circumferential direction of the cooling water flow channel (13).

11. The housing with cooling performance according to claim 9, characterized in that: The cooling air flow path (21) includes a first air passage (211) and a second air passage (212) spaced apart in the radial direction of the housing (1). The first air passage (211) extends along the axial direction of the housing (1), and the second air passage (212) also extends along the axial direction of the housing (1). The first air passage (211) is communicated with the second air passage (212) through a communication air passage (213).

12. The housing with cooling performance according to claim 11, wherein: An air-cooling inlet (20) is provided on the outer wall of the housing (1). The air-cooling inlet (20) is communicated with one end of the first air passage (211). The first air passage (211) extends axially and is communicated with one axial end of the second air passage (212) through the communication air passage (213) at its axial end. A first air guiding through hole (22) is provided at one axial end of the housing (1). The first air guiding through hole (22) is communicated with one axial end of the second air passage (212) to introduce gas to one axial end inside the housing (1). A second air guiding through hole (23) is provided at the other axial end of the housing (1). The second air guiding through hole (23) is communicated with the other axial end of the second air passage (212) to introduce gas to the other axial end inside the housing (1).

13. A motor, characterized in that: It includes the housing with cooling performance according to any one of claims 1-12.

14. The motor according to claim 13, wherein: When a water-cooling inlet (25) and a water-cooling outlet (26) are further provided on the housing (1), the motor further includes a stator (2). The water-cooling inlet (25) is oppositely arranged in the radial direction of the housing (1) with the outgoing line side of the stator (2).

15. A compressor, characterized in that: It includes the motor according to any one of claims 13-14.

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