CN219774376U - Compressor and refrigeration system - Google Patents

Abstract

The utility model discloses a compressor, which comprises a shell, a main shaft, a stator, a rotor, a radial bearing, a thrust bearing and a cooling assembly, wherein the shell comprises a bearing seat, the bearing seat is arranged in an inner cavity of the shell, the main shaft penetrates through the shell along the axial direction of the bearing seat and is rotatably assembled in the bearing seat, and the main shaft is provided with a thrust disc; the stator is arranged in the inner cavity of the shell, and the rotor is arranged on the main shaft; the radial bearing is arranged in the bearing seat and sleeved on the outer peripheral side of the main shaft, and the thrust bearing is arranged on one side of the thrust disc along the circumferential direction of the main shaft; the cooling assembly comprises a cooling groove and a cooling channel, wherein the cooling groove is arranged on the shell and extends along part of the outer periphery side of the stator, and the cooling channel is arranged on the bearing seat and is communicated with the cooling channel. The compressor provided by the embodiment of the utility model has the advantage of better cooling effect.

Description

Compressor and refrigeration system

Technical Field

The utility model relates to the technical field of refrigeration equipment, in particular to a compressor and a refrigeration system using the same.

Background

The centrifugal compressor is a vane rotary speed type compressor, and has the characteristics of high rotating speed, small volume, low noise and stable operation under the condition of the same exhaust capacity, and the centrifugal compressor in the related technology has the defects of poor heat dissipation effect and lower operation stability.

Disclosure of Invention

The present utility model aims to solve at least one of the technical problems in the related art to some extent. For this reason, the embodiment of the utility model provides a compressor which has the advantage of better cooling effect.

The compressor comprises a shell and a main shaft, wherein the shell comprises a bearing seat, the bearing seat is arranged in an inner cavity of the shell, the main shaft penetrates through the shell along the axial direction of the bearing seat and is rotatably assembled in the bearing seat, and the main shaft is provided with a thrust disc; the stator is arranged in the inner cavity of the shell, the rotor is arranged on the main shaft, and at least part of the rotor is rotatably assembled in the stator; the radial bearing is arranged in the bearing seat and sleeved on the outer peripheral side of the main shaft so as to be suitable for reducing the friction effect between the main shaft and the shell, and the thrust bearing is arranged on one side of the thrust disc along the circumferential direction of the main shaft so as to be suitable for reducing the axial displacement of the main shaft; the cooling assembly comprises a cooling groove and a cooling channel, the cooling groove is arranged on the shell and extends along part of the outer peripheral side of the stator, the cooling channel is arranged on the bearing seat, and the cooling groove is communicated with the cooling channel and is suitable for the cooling medium to flow so as to cool the stator and the radial bearing.

The compressor provided by the embodiment of the utility model has the advantage of better cooling effect.

In some embodiments, the cooling channels are a plurality of, and the plurality of cooling channels are evenly spaced along the circumference of the bearing seat.

In some embodiments, the main shaft comprises a first section and a second section, the rotor is connected between the first section and the second section, the bearing seat comprises a first seat and a second seat, the radial bearing comprises a first bearing and a second bearing, the first bearing is arranged on the first section and opposite to the first seat, and the second bearing is arranged on the second section and opposite to the second seat.

In some embodiments, the housing includes a first port and a second port, the cooling channel includes a first channel and a second channel, the first channel extends through the first seat along an axial direction of the spindle, the second channel extends through the second seat along an axial direction of the spindle, the first port communicates with one end of the cooling slot, the other end of the cooling slot communicates with one end of the first channel facing away from the stator, and one end of the second channel facing away from the stator communicates with the second port.

In some embodiments, there is a gap between the stator and the rotor in a radial direction of the spindle, one end of the gap communicating with the other end of the first channel, the other end of the gap communicating with the other end of the second channel.

In some embodiments, the first bearing comprises a first collar sleeved on the outer circumferential side of the first section and assembled to the first seat, the outer circumferential side of the first section is provided with a plurality of first grooves, and the plurality of first grooves are arranged at intervals along the circumferential direction of the first section and are opposite to the first collar so as to be suitable for generating an air film between the first section and the first collar when the main shaft rotates so as to reduce friction between the first section and the first collar;

and/or the second bearing comprises a second collar which is sleeved on the outer peripheral side of the second section and is assembled on the second seat, a plurality of second grooves are formed in the outer peripheral side of the second section, and the second grooves are distributed at intervals along the circumferential direction of the second section and are oppositely arranged with the second collar so as to be suitable for generating an air film between the second section and the second collar when the main shaft rotates to reduce friction between the second section and the second collar.

In some embodiments, the housing comprises an annular groove extending in a closed manner along the outer peripheral side of the spindle, the thrust plate rotatably fitted in the annular groove, the thrust plate comprising a first face and a second face, the annular groove comprising a third face and a fourth face, the first face and the third face being oppositely disposed, the second face and the fourth face being oppositely disposed, the first face being provided with a plurality of third grooves, the third face being provided with a first base plate, the plurality of third grooves being spaced apart along the circumference of the thrust plate to be adapted to generate an air film between the first face and the first base plate to form the thrust bearing upon rotation of the spindle;

and/or a plurality of fourth grooves are formed in the second face, a second bottom plate is arranged on the fourth face, and the fourth grooves are arranged at intervals along the circumferential direction of the thrust disc, so that an air film is generated between the second face and the second bottom plate when the main shaft rotates, and the thrust bearing is formed.

In some embodiments, the annular groove is provided at an end of the second seat facing away from the stator, and the end of the second channel facing away from the stator portion communicates with the annular groove, which communicates with the second port.

In some embodiments, the compressor includes a first impeller and a second impeller, a portion of the first section extends out of the housing and forms a first outer extension, a portion of the second section extends out of the housing and forms a second outer extension, the first impeller is disposed in the first outer extension, the second impeller is disposed in the second outer extension, and the first impeller and the second impeller are disposed opposite each other.

The refrigeration system according to an embodiment of the present utility model includes the compressor according to any of the above embodiments.

Drawings

Fig. 1 is a schematic cross-sectional view of a compressor according to an embodiment of the present utility model.

Fig. 2 is a schematic view of a cooling passage of a compressor according to an embodiment of the present utility model.

Reference numerals:

a housing 1; a cooling tank 11; an annular groove 12; a first port 13; a second port 14; a first seat 101; a first channel 1011; a first bearing 1012; a second seat 102; a second channel 1021; a second bearing 1022;

a main shaft 2; a first section 21; a second section 22; a thrust plate 23;

a stator 3; a rotor 4;

a first impeller 51; a second impeller 52;

a first volute 61; a second volute 62.

Detailed Description

Reference will now be made in detail to embodiments of the present utility model, examples of which are illustrated in the accompanying drawings. The embodiments described below by referring to the drawings are illustrative and intended to explain the present utility model and should not be construed as limiting the utility model.

A compressor according to an embodiment of the present utility model will be described with reference to fig. 1 to 2.

The compressor comprises a shell 1, a main shaft 2, a stator 3, a rotor 4, a radial bearing, a thrust bearing and a cooling assembly.

The housing 1 comprises a bearing seat, the bearing seat is arranged in an inner cavity of the housing 1, the main shaft 2 penetrates through the housing 1 along the axial direction of the bearing seat and is rotatably assembled in the bearing seat, and the main shaft 2 is provided with a thrust disc 23.

Specifically, the housing 1 has an inner cavity, the bearing seat is disposed in the inner cavity, and a mounting hole for mounting a bearing is further disposed in the bearing seat, the mounting hole penetrates the bearing seat along the extending direction of the spindle 2, and the spindle 2 is mounted on the bearing seat through the bearing, so that the spindle 2 can rotate relative to the housing 1.

The stator 3 is arranged in the inner cavity of the shell 1, the rotor 4 is arranged on the main shaft 2, and at least part of the rotor 4 is rotatably assembled in the stator 3.

Specifically, the stator 3 is fixed on the casing 1, the rotor 4 is rotatably matched in the stator 3, under the action of current in the stator 3, a variable magnetic field is generated in the stator 3 to enable the rotor 4 to rotate relative to the stator 3, the rotor 4 is connected with the spindle 2, and the spindle 2 rotates along with the rotor 4 when the rotor 4 rotates.

The radial bearing is provided in the bearing housing and is fitted over the outer circumferential side of the main shaft 2 to be suitable for reducing friction between the main shaft 2 and the housing 1, and the thrust bearing is provided on one side of the thrust disk 23 in the circumferential direction of the main shaft 2 to be suitable for reducing axial displacement of the main shaft 2.

Specifically, the radial bearing is provided in the bearing housing, and the spindle 2 penetrates the radial bearing, and the radial bearing can reduce friction with the housing 1 in rotation of the spindle 2 when the spindle 2 rotates relative to the housing 1.

The thrust plate 23 is provided on the outer peripheral side of the spindle 2, and the thrust plate 23 extends along the circumferential direction of the spindle 2, and when the spindle 2 rotates, the thrust plate 23 also rotates. The thrust bearing is arranged on one side or two sides of the thrust disc 23 along the axial direction of the main shaft 2, when the main shaft 2 generates radial displacement in rotation, the thrust disc 23 is abutted against the thrust bearing so as to reduce the axial displacement of the main shaft 2, and the thrust bearing can effectively reduce the friction effect between the thrust disc 23 and the shell 1, thereby reducing the resistance applied to the rotation of the main shaft 2.

The cooling assembly includes a cooling groove 11 provided in the housing 1 and extending along the outer peripheral side of a part of the stator 3, and a cooling passage provided in the bearing housing, the cooling groove 11 and the cooling passage communicating and adapted to flow a cooling medium to cool the stator 3 and the radial bearing.

Specifically, the cooling groove 11 extends along the outer circumferential side of the stator 3, the cooling passage is provided in the bearing housing, and when the cooling medium flows in the cooling groove 11 and the cooling passage, heat exchange occurs between the inner wall of the cooling medium cooling groove 11 and the inner wall of the cooling passage, and heat on the outer circumferential side of the stator 3 and heat generated by the radial bearing are taken away, thereby lowering the temperature in the housing 1.

According to the compressor disclosed by the embodiment of the utility model, the cooling groove 11 is arranged on the outer peripheral side of the stator 3 for cooling medium to flow along the outer peripheral side of the stator 3 so as to cool the stator 3, the cooling channel is arranged in the bearing seat for cooling medium to flow in the bearing seat so as to cool the radial bearing, and heat generated by the stator 3 and the radial bearing is carried out of the shell 1, so that the stator 3 and the radial bearing are cooled, and the compressor disclosed by the embodiment of the utility model has the advantage of better cooling effect.

In some embodiments, there are a plurality of cooling channels, the plurality of cooling channels being evenly spaced along the circumference of the bearing housing.

Specifically, the plurality of cooling channels are uniformly spaced along the circumference of the bearing housing in the bearing housing, and when the radial bearing works, the plurality of cooling channels are uniformly spaced along the circumference of the radial bearing, and when the radial bearing generates heat, the plurality of cooling channels can uniformly absorb the heat emitted into the bearing housing by the radial bearing.

Therefore, the plurality of cooling channels are uniformly arranged at intervals along the circumferential direction of the radial bearing, so that cooling mediums are uniformly distributed along the circumferential direction of the radial bearing, the temperature of the bearing seat along the circumferential direction of the radial bearing is uniformly changed, heat accumulation in the bearing seat is reduced, and the cooling effect of the cooling channels on the bearing seat and the radial bearing is improved.

In some embodiments, the spindle 2 comprises a first section 21 and a second section 22, the rotor 4 is connected between the first section 21 and the second section 22, the bearing housing comprises a first seat 101 and a second seat 102, the radial bearing comprises a first bearing 1012 and a second bearing 1022, the first bearing 1012 is provided in the first section 21 and is arranged opposite the first seat 101, and the second bearing 1022 is provided in the second section 22 and is arranged opposite the second seat 102.

Specifically, the first section 21 and the second section 22 are arranged along the axial direction of the main shaft 2, the first section 21, the rotor 4 and the second section 22 are connected end to end along the axial direction of the main shaft 2, two radial bearings are respectively a first bearing 1012 and a second bearing 1022, corresponding to the first bearing 1012 and the second bearing 1022, the bearing seats comprise a first seat 101 and a second seat 102, and the first seat 101 and the second seat 102 are arranged at intervals along the axial direction of the main shaft 2.

The first seat 101 is disposed on the outer peripheral side of the first section 21, the first bearing 1012 is disposed in the first seat 101 and sleeved on the outer peripheral side of the first section 21 to be suitable for supporting the first section 21, the second seat 102 is disposed on the outer peripheral side of the second section 22, and the second bearing 1022 is disposed in the second seat 102 and sleeved on the outer peripheral side of the second section 22 to be suitable for supporting the second section 22.

Therefore, two radial bearings are arranged, the two radial bearings are used for supporting the main shaft 2 in the radial direction of the main shaft 2, so that the number of supporting positions of the main shaft 2 is increased, on one hand, the stability of the main shaft 2 in the rotating process is improved, on the other hand, the precision of the main shaft 2 in the rotating process is improved, and the radial swing of the main shaft 2 is reduced.

In some embodiments, the housing 1 comprises a first port 13 and a second port 14, the cooling channel comprises a first channel 1011 and a second channel 1021, the first channel 1011 extends through the first seat 101 along the axial direction of the spindle 2, the second channel 1021 extends through the second seat 102 along the axial direction of the spindle 2, the first port 13 communicates with one end of the cooling slot 11, the other end of the cooling slot 11 communicates with one end of the first channel 1011 facing away from the stator 3, and one end of the second channel 1021 facing away from the stator 3 communicates with the second port 14.

Specifically, as shown in fig. 2, the first port 13, the cooling groove 11, the first passage 1011, the gap between the rotor 4 and the stator 3, the second passage 1021, and the second port 14 are sequentially connected, the cooling medium is a cooling air flow, the cooling air flow flows from the first port 13 into the housing 1, and flows in the housing 1 along the paths of the first port 13, the cooling groove 11, the first passage 1011, the gap between the rotor 4 and the stator 3, the second passage 1021, and the second port 14 to carry heat generated by the stator 3 and the radial bearing out of the housing 1 in the flow, and cool down the inside of the housing 1.

In some embodiments, there is a gap between the stator 3 and the rotor 4 in the radial direction of the main shaft 2, one end of the gap communicates with the other end of the first passage 1011, and the other end of the gap communicates with the other end of the second passage 1021.

Specifically, the first passage 1011 is located at one side of the stator 3 and the rotor 4, the second passage 1021 is located at the other side of the stator 3 and the rotor 4, and an annular gap is provided between the stator 3 and the rotor 4, as shown in fig. 2, and the cooling air flows through the first passage 1011, the gap, and the second passage 1021.

Therefore, the cooling air flow can absorb and radiate heat at the matched position of the stator 3 and the rotor 4 to the outer side of the shell 1, and the cooling effect of the stator 3 is further improved, so that the cooling effect of the compressor in the embodiment of the utility model is improved.

In some embodiments, the first bearing 1012 includes a first collar sleeved on the outer circumferential side of the first segment 21 and fitted to the first seat 101, the outer circumferential side of the first segment 21 being provided with a plurality of first grooves arranged at intervals along the circumference of the first segment 21 and opposite to the first collar, adapted to generate a gas film between the first segment 21 and the first collar when the spindle 2 rotates to reduce friction between the first segment 21 and the first collar;

and/or the second bearing 1022 comprises a second collar, the second collar is sleeved on the outer peripheral side of the second section 22 and is assembled on the second seat 102, the outer peripheral side of the second section 22 is provided with a plurality of second grooves, and the plurality of second grooves are arranged along the circumferential direction of the second section 22 at intervals and are opposite to the second collar so as to be suitable for generating an air film between the second section 22 and the second collar when the spindle 2 rotates to reduce the friction effect between the second section 22 and the second collar.

Specifically, the first collar is sleeved on the outer peripheral side of the first section 21, the outer wall of the first collar is connected with the first seat 101, a plurality of first grooves are formed in a portion, corresponding to the first collar, of the first section 21, the plurality of first grooves are distributed at equal intervals along the outer peripheral side of the first section 21, when the first section 21 rotates relative to the first collar, the plurality of first grooves disturb air flow, an air film is formed in the first collar so that the first section 21 and the first collar are separated, and therefore a first bearing 1012 is formed.

The second collar is sleeved on the outer peripheral side of the second section 22, the outer wall of the second collar is connected with the second seat 102, a plurality of second grooves are formed in the portion, corresponding to the second collar, of the second section 22, the second grooves are distributed at equal intervals along the outer peripheral side of the second section 22, when the second section 22 rotates relative to the second collar, the second grooves disturb the air flow, an air film is formed in the second collar so that the second section 22 and the second collar are separated, and accordingly a second bearing 1022 is formed.

Therefore, compared with the bearings in the related art, the first bearing 1012 and the second bearing 1022 are air-floating bearings, on one hand, the air-floating bearings do not contain oil, so that the air flow in the shell 1 is prevented from being polluted, the air flow output by the compressor of the embodiment of the utility model does not contain fine lubricating oil beads, and on the other hand, the air film in the air-floating bearings has good fluidity, so that heat generated at the first lantern ring is conveniently taken away in time, and the cooling effect on the radial bearings is improved.

In some embodiments, the housing 1 comprises an annular groove 12, the annular groove 12 extends along the outer peripheral side of the spindle 2 in a closed manner, the thrust disc 23 is rotatably fitted in the annular groove 12, the thrust disc 23 comprises a first face and a second face, the annular groove 12 comprises a third face and a fourth face, the first face and the third face are oppositely arranged, the second face and the fourth face are oppositely arranged, a plurality of third grooves are arranged on the first face, a first bottom plate is arranged on the third face, and the plurality of third grooves are arranged at intervals along the circumference of the thrust disc 23 so as to be suitable for generating an air film between the first face and the first bottom plate to form a thrust bearing when the spindle 2 rotates;

and/or a plurality of fourth grooves are provided on the second face, a second bottom plate is provided on the fourth face, and the plurality of fourth grooves are arranged at intervals along the circumferential direction of the thrust disc 23 so as to be adapted to generate an air film between the second face and the second bottom plate to form a thrust bearing when the spindle 2 rotates.

Specifically, the annular groove 12 extends along the circumferential direction of the spindle 2, and the thrust plate 23 is rotatably fitted in the annular groove 12, and when the spindle 2 receives an axial thrust force, a first face of the thrust plate 23 may abut against the third face, or a second face may abut against the fourth face, to reduce the axial displacement of the spindle 2.

The first surface is provided with a plurality of third grooves which are arranged at equal intervals along the circumferential direction of the main shaft 2, when the thrust disc 23 rotates relative to the annular groove 12, under the disturbance action of the third grooves, a compact air film is generated between the first surface and the third surface so as to separate the first surface from the third surface, and the friction action between the first surface and the third surface is reduced, so that a part of thrust bearing is formed.

The second surface is provided with a plurality of fourth grooves which are arranged at equal intervals along the circumferential direction of the main shaft 2, and when the thrust disc 23 rotates relative to the annular groove 12, under the disturbance action of the fourth grooves, a compact air film is generated between the second surface and the fourth surface so as to separate the second surface from the fourth surface, and the friction action between the second surface and the fourth surface is reduced, so that a part of thrust bearing is formed.

Therefore, compared with the bearing in the related art, the thrust bearing is an air bearing, on one hand, the air bearing does not contain oil, so that the air flow in the shell 1 is prevented from being polluted, the air flow output by the compressor of the embodiment of the utility model does not contain fine lubricating oil beads, and on the other hand, the air film in the air bearing has better fluidity, so that heat generated in the annular groove 12 can be taken away in time, and the cooling effect of the thrust bearing is improved.

In some embodiments, the annular groove 12 is provided at an end of the second seat 102 facing away from the stator 3, and an end of the second passage 1021 facing away from the stator 3 communicates with the annular groove 12, and the annular groove 12 communicates with the second port 14.

Specifically, the second seat 102 is provided between the annular groove 12 and the stator 3, one end of the second passage 1021 communicates with the gap, the other end of the second passage 1021 communicates with the annular groove 12, and the second port 14 communicates with the annular groove 12, so that the cooling air flow can flow into the annular groove 12 through the second passage 1021 and to the second port 14 through the annular groove 12 to be discharged out of the housing 1.

Thereby, the annular groove 12 communicates with the second passage 1021, so that the cooling air flow flows through the annular groove 12 to carry the heat generated by the thrust bearing out of the housing 1, thereby improving the cooling effect of the thrust bearing and further improving the cooling effect of the compressor of the embodiment of the utility model.

In some embodiments, the compressor includes a first impeller 51 and a second impeller 52, a portion of the first section 21 extends out of the housing 1 and forms a first extension, a portion of the second section 22 extends out of the housing 1 and forms a second extension, the first impeller 51 is disposed in the first extension, the second impeller 52 is disposed in the second extension, and the first impeller 51 and the second impeller 52 are disposed opposite each other.

Specifically, one end of the first section 21 extends out of the casing 1, and the first section 21 and the casing 1 are rotatably and hermetically connected, a first impeller 51 is provided at an outer extension section of the first section 21, the first impeller 51 is fitted in a first volute 61 to generate high-pressure gas, one end of the second section 22 extends out of the casing 1, and the second section 22 and the casing 1 are rotatably and hermetically connected, a second impeller 52 is provided at an outer extension section of the second section 22, and the second impeller 52 is fitted in a second volute 62 to secondarily pressurize the high-pressure gas generated by the first impeller 51.

Therefore, the first impeller 51 and the second impeller 52 are respectively arranged at two ends of the main shaft 2, on one hand, the air flow pressure output by the compressor in the embodiment of the utility model is improved by arranging the two-stage pressurization, the working efficiency of the compressor in the embodiment of the utility model is improved, on the other hand, the first impeller 51 and the second impeller 52 are oppositely arranged, and when the main shaft 2 rotates, the axial acting forces generated by the first impeller 51 and the second impeller 52 are balanced, so that the axial thrust applied to the main shaft 2 is reduced.

The refrigeration system of the embodiment of the utility model comprises the compressor of any embodiment.

Specifically, the compressor according to the embodiment of the utility model is provided with the cooling groove 11 on the outer peripheral side of the stator 3 for cooling medium to flow along the outer peripheral side of the stator 3 so as to cool the stator 3, and the cooling channel is provided in the bearing seat for cooling medium to flow in the bearing seat so as to cool the radial bearing, and the heat generated by the stator 3 and the radial bearing is carried out of the shell 1, so that the stator 3 and the radial bearing are cooled, and the compressor according to the embodiment of the utility model has the advantage of better cooling effect.

Therefore, when the refrigerating system of the embodiment of the utility model works, the failure rate of the compressor caused by heat generation is lower, and the working stability of the refrigerating system of the embodiment of the utility model is improved.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

For purposes of this disclosure, the terms "one embodiment," "some embodiments," "example," "a particular example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

While the above embodiments have been shown and described, it should be understood that the above embodiments are illustrative and not to be construed as limiting the utility model, and that variations, modifications, alternatives, and variations of the above embodiments may be made by those of ordinary skill in the art without departing from the scope of the utility model.

Claims (10)

1. A compressor, comprising:

the device comprises a shell and a main shaft, wherein the shell comprises a bearing seat, the bearing seat is arranged in an inner cavity of the shell, the main shaft penetrates through the shell along the axial direction of the bearing seat and is rotatably assembled in the bearing seat, and the main shaft is provided with a thrust disc;

the stator is arranged in the inner cavity of the shell, the rotor is arranged on the main shaft, and at least part of the rotor is rotatably assembled in the stator;

the radial bearing is arranged in the bearing seat and sleeved on the outer peripheral side of the main shaft so as to be suitable for reducing the friction effect between the main shaft and the shell, and the thrust bearing is arranged on one side of the thrust disc along the circumferential direction of the main shaft so as to be suitable for reducing the axial displacement of the main shaft;

the cooling assembly comprises a cooling groove and a cooling channel, the cooling groove is arranged on the shell and extends along part of the outer peripheral side of the stator, the cooling channel is arranged on the bearing seat, and the cooling groove is communicated with the cooling channel and is suitable for cooling medium to flow so as to cool the stator and the radial bearing.

2. The compressor of claim 1, wherein there are a plurality of said cooling passages, a plurality of said cooling passages being evenly spaced along a circumference of said bearing housing.

3. The compressor of claim 2, wherein the main shaft includes a first section and a second section, the rotor is connected between the first section and the second section, the bearing housing includes a first seat and a second seat, the radial bearing includes a first bearing and a second bearing, the first bearing is disposed on the first section and opposite the first seat, and the second bearing is disposed on the second section and opposite the second seat.

4. A compressor according to claim 3, wherein the housing comprises a first port and a second port, the cooling passage comprises a first passage extending through the first seat in the axial direction of the main shaft and a second passage extending through the second seat in the axial direction of the main shaft, the first port communicates with one end of the cooling tank, the other end of the cooling tank communicates with one end of the first passage facing away from the stator, and one end of the second passage facing away from the stator communicates with the second port.

5. The compressor of claim 4, wherein a gap is provided between the stator and the rotor in a radial direction of the main shaft, one end of the gap communicates with the other end of the first passage, and the other end of the gap communicates with the other end of the second passage.

6. The compressor of claim 5, wherein the first bearing includes a first collar fitted around an outer circumferential side of the first section and fitted to the first seat, the outer circumferential side of the first section being provided with a plurality of first grooves arranged at intervals along a circumferential direction of the first section and arranged opposite the first collar so as to be adapted to generate an air film between the first section and the first collar when the main shaft rotates to reduce friction between the first section and the first collar;

and/or the second bearing comprises a second collar which is sleeved on the outer peripheral side of the second section and is assembled on the second seat, a plurality of second grooves are formed in the outer peripheral side of the second section, and the second grooves are distributed at intervals along the circumferential direction of the second section and are oppositely arranged with the second collar so as to be suitable for generating an air film between the second section and the second collar when the main shaft rotates to reduce friction between the second section and the second collar.

7. The compressor of claim 5, wherein the housing includes an annular groove extending closed along an outer peripheral side of the main shaft, the thrust plate rotatably fitted in the annular groove, the thrust plate including a first face and a second face, the annular groove including a third face and a fourth face, the first face and the third face being disposed opposite each other, the first face being provided with a plurality of third grooves, the third face being provided with a first bottom plate, the plurality of third grooves being disposed at intervals along a circumferential direction of the thrust plate so as to be adapted to generate an air film between the first face and the first bottom plate to form the thrust bearing upon rotation of the main shaft;

and/or a plurality of fourth grooves are formed in the second face, a second bottom plate is arranged on the fourth face, and the fourth grooves are arranged at intervals along the circumferential direction of the thrust disc, so that an air film is generated between the second face and the second bottom plate when the main shaft rotates, and the thrust bearing is formed.

8. The compressor of claim 7, wherein the annular groove is provided at an end of the second seat facing away from the stator, an end of the second passage facing away from the stator portion communicates with the annular groove, and the annular groove communicates with the second port.

9. A compressor according to claim 3, comprising a first impeller and a second impeller, a portion of the first section extending beyond the housing and forming a first outer extension and a portion of the second section extending beyond the housing and forming a second outer extension, the first impeller being disposed in the first outer extension, the second impeller being disposed in the second outer extension, and the first impeller and the second impeller being disposed in opposition.

10. A refrigeration system comprising a compressor as claimed in any one of claims 1 to 9.