CN216306227U

CN216306227U - Compressor and air conditioner

Info

Publication number: CN216306227U
Application number: CN202122999255.1U
Authority: CN
Inventors: 刘华; 张治平; 武晓昆; 唐晗
Original assignee: Gree Electric Appliances Inc of Zhuhai
Current assignee: Gree Electric Appliances Inc of Zhuhai
Priority date: 2021-12-01
Filing date: 2021-12-01
Publication date: 2022-04-15
Anticipated expiration: 2031-12-01

Abstract

The utility model provides a compressor and an air conditioner, comprising a first rotor, a second rotor and a third rotor, wherein the first rotor comprises a first working part and a second working part; a first shaft body carrying a first working part and a second working part; a second rotor including a third working portion meshed with the first working portion and a fourth working portion meshed with the second working portion; a second shaft body carrying the third working part and the fourth working part; a third rotor including a fifth working portion and a sixth working portion; the third shaft body is coaxial with the first shaft body and bears the fifth working part and the sixth working part; a fourth rotor including a seventh working portion and an eighth working portion; and the fourth shaft body is used for carrying a seventh working part and an eighth working part, the fourth shaft body is coaxial with the second shaft body, the seventh working part is meshed with the fifth working part, and the eighth working part is meshed with the sixth working part. The compressor can increase the exhaust amount without occupying too much space.

Description

Compressor and air conditioner

Technical Field

The utility model relates to the technical field of compressors, in particular to a compressor and an air conditioner.

Background

The compressor is generally arranged with a pair of parallel screw rotors placed in the spatial volume of the casing of the screw compressor. The space volume of the pair of screw rotors is periodically increased and decreased during the rotation process, so that the space volume is periodically communicated with and closed off the air inlet and the air outlet, and the processes of air suction, compression and air exhaust can be completed.

In order to increase the displacement of the compressor, the existing helical rotor structure is generally selected to be large, which results in the increase of the size of the compressor structure and the increase of the occupied space.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides a compressor and an air conditioner, and aims to solve the problem that the occupied space of the compressor is too large when the displacement of the compressor is increased.

In a first aspect, an embodiment of the present invention provides a compressor, including:

a first rotor rotatable along a first axis, the first rotor including a first working portion and a second working portion;

a first shaft body carrying the first working part and the second working part;

a second rotor rotatable along a second axis, the second rotor including a third working portion and a fourth working portion;

a second shaft carrying the third working portion and the fourth working portion, the third working portion being engaged with the first working portion and the fourth working portion being engaged with the second working portion;

a third rotor rotatable along a third axis, the third rotor including a fifth working portion and a sixth working portion;

the third shaft body bears the fifth working part and the sixth working part, and the third shaft body and the first shaft body are coaxially arranged;

a fourth rotor rotatable along a fourth axis, the fourth rotor including a seventh working portion and an eighth working portion; and

and the fourth shaft body is used for bearing the seventh working part and the eighth working part, the fourth shaft body and the second shaft body are coaxially arranged, the seventh working part is meshed with the fifth working part, and the eighth working part is meshed with the sixth working part.

In an optional implementation manner of the present invention, the compressor further includes a motor, the first shaft and the third shaft are respectively disposed at two opposite sides of the motor, the motor includes a first output end and a second output end, the first shaft is in transmission connection with the first output end, and the third shaft is in transmission connection with the second output end.

In an alternative embodiment of the present invention, during the rotation of the first rotor, a force is applied in an axial direction of the first shaft body and in a predetermined direction, and during the rotation of the third rotor, a force is applied in an axial direction of the third shaft body and in the predetermined direction or in a direction opposite to the predetermined direction.

In an optional embodiment of the present invention, the compressor further includes a first hydraulic device and a second hydraulic device, the first hydraulic device is disposed on the first shaft body and is configured to apply an acting force to the first shaft body along an axial direction of the first shaft body and toward a preset direction; the second hydraulic device is arranged on the third shaft body and used for applying acting force to the third shaft body along the axial direction of the third shaft body and towards the preset direction or opposite to the preset direction.

In an optional implementation manner of the present invention, the compressor further includes a motor, the first shaft and the third shaft are disposed on the same side of the motor, the first shaft is in transmission connection with an output end of the motor, and the third shaft is fixedly connected to the first shaft.

In an alternative embodiment of the present invention, during the rotation of the first rotor and the third rotor, a resultant force is generated in an axial direction of the first shaft body and in a predetermined direction.

In an optional implementation manner of the present invention, the compressor further includes a third hydraulic device, where the third hydraulic device is disposed on the first shaft, and is configured to apply an acting force to the first shaft in an axial direction of the first shaft and in a preset direction, so that a resultant force between the first shaft and the third shaft in the preset direction is generated.

In an optional implementation manner of the present invention, the compressor further includes a fourth hydraulic device, where the fourth hydraulic device is disposed on the third shaft, and is configured to apply an acting force to the third shaft in an axial direction of the third shaft and in a preset direction, so that a resultant force between the first shaft and the third shaft in the preset direction is generated.

In an optional embodiment of the present invention, the first shaft body and the third shaft body are integrally formed.

In a second aspect, the embodiment of the present invention further provides an air conditioner, including the compressor as described above.

The compressor and the air conditioner provided by the embodiment of the utility model are provided with a first rotor, a second rotor, a third rotor and a fourth rotor, wherein the first rotor is coaxially arranged with the third rotor, the second rotor is coaxially arranged with the fourth rotor, the first rotor comprises a first working part and a second working part, the second rotor comprises a third working part and a fourth working part, the second rotor can be meshed with the second rotor during the rotation of the first rotor, namely the first working part is meshed with the third working part, the second working part is meshed with the fourth working part, so that the first rotor and the second rotor can form two sets of rotor pairs, the third rotor can be meshed with the fourth rotor during the rotation of the third rotor, namely the fifth working part is meshed with the seventh working part, and the sixth working part is meshed with the eighth working part, so that the third rotor and the fourth rotor can form two sets of rotor pairs, thereby forming two sets of rotor pairs on the first rotor, the second rotor, the third rotor and the fourth rotor, The second rotor, the third rotor and the fourth rotor are matched to form four groups of rotor pairs, compared with the prior art, the meshing of the first rotor, the second rotor, the third rotor and the fourth rotor is equivalent to combining four screw compressors, and compared with four independent screw compressors, the compressor provided by the embodiment of the utility model is more compact and has fewer parts. Therefore, the compressor of the embodiment of the utility model can not occupy excessive space when the air displacement is increased.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below. It is obvious that the drawings in the following description are only some embodiments of the utility model, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.

For a more complete understanding of the present invention, and the advantages thereof, reference is now made to the following descriptions taken in conjunction with the accompanying drawings, wherein like reference numerals represent like parts in the following description.

Fig. 1 is a partial schematic view of a first structure of a compressor according to an embodiment of the present invention.

Fig. 2 is a partial schematic view of the first shaft body in fig. 1 when a first hydraulic device is provided.

Fig. 3 is a first partial schematic view of a connection between the first shaft and the cylinder in fig. 2.

Fig. 4 is a second partial schematic view of the connection between the first shaft and the cylinder in fig. 2.

Fig. 5 is a third partial schematic view of the connection between the first shaft and the cylinder in fig. 2.

Fig. 6 is a fourth partial schematic view of the connection between the first shaft and the cylinder in fig. 2.

Fig. 7 is a partial schematic view of the third shaft body in fig. 1 in which a second hydraulic device is provided.

Fig. 8 is a partial schematic view of a second structure of a compressor according to an embodiment of the present invention.

Fig. 9 is a partial schematic view of a case where a third hydraulic device is provided on the first shaft body in fig. 8.

Reference numerals:

100. a compressor; 10. a motor; 11. a motor stator; 12. a motor rotor;

21. a first shaft body; 212. a first seal groove; 213. a second seal groove; 214. positioning the shaft shoulder;

22. a first rotor; 221. a first working portion; 222. a second working portion;

23. a second shaft body; 232. a first channel;

24. a second rotor; 241. a third working section; 242. a fourth working section;

25. a third rotor; 251. a fifth working section; 252. a sixth working section;

26. a third shaft body; 27. a fourth shaft body;

28. a fourth rotor; 281. a seventh working section; 282. an eighth working section;

30. a first housing; 301. a first case body; 302. a first end cap; 3021. a second channel; 303. a second end cap;

40. a first hydraulic device; 401. a cylinder body; 4011. a first space; 4012. a second space; 4013. a liquid inlet; 4014. annular seal teeth; 402. a piston; 403. a seal ring; 404. a slip ring; 405. a fastener;

50. a thrust bearing; 60. a second housing; 70. a second hydraulic device; 80. a third hydraulic device;

h1, first direction; h2, second direction.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is to be understood that the described embodiments are merely exemplary of the utility model, and not restrictive of the full scope of the utility model. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, belong to the scope of protection of the present invention.

The embodiment of the utility model provides a compressor and an air conditioner, and aims to solve the problem that the occupied space of the compressor is too large when the displacement of the compressor is increased. This will be explained below with reference to the drawings.

Referring to fig. 1, fig. 1 is a partial schematic view of a first structure of a compressor according to an embodiment of the present invention. The compressor 100 shown in FIG. 1 may be a screw compressor, such as where the compressor 100 is an opposed screw compressor. The compressor 100 may include a motor 10 and a rotor assembly, the motor 10 is in transmission connection with the rotor assembly to drive the rotor assembly to rotate, wherein the rotor assembly may include a first shaft 21, a first rotor 22, a second shaft 23, a second rotor 24, a third rotor 25, a third shaft 26, a fourth shaft 27, and a fourth rotor 28. The first rotor 22, the second rotor 24, the third rotor 25, and the fourth rotor 28 may be housed and supported by a housing, with the first shaft body 21 carrying the first rotor 22, the second shaft body 23 carrying the second rotor 24, the third shaft body 26 carrying the third rotor 25, and the fourth shaft body 27 carrying the fourth rotor 28. The first rotor 22 and the second rotor 24 are engaged with each other and accommodated and supported in the first housing 30, and the third rotor 25 and the fourth rotor 28 are engaged with each other and accommodated and supported in the second housing 60.

It should be noted that the terms "first", "second", and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between different objects and not for describing a particular order. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover non-exclusive inclusions.

Please continue to refer to fig. 1. In an embodiment of the present invention, the first rotor 22 and the third rotor 25 may be male rotors, and the second rotor 24 and the fourth rotor 28 may be female rotors.

Here, the first rotor 22 and the third rotor 25 as the male rotors may be understood that the first rotor 22 and the third rotor 25 are driving rotors, and the second rotor 24 and the fourth rotor 28 as the female rotors may be understood that the second rotor 24 and the fourth rotor 28 are driven rotors. For example, the first rotor 22 and the third rotor 25 may be drivingly connected to a drive assembly such as the electric machine 10 (including but not limited to a permanent magnet machine), the first rotor 22 and the third rotor 25 may be rotationally driven by the drive assembly, the first rotor 22 simultaneously rotates the second rotor 24, and the third rotor 25 simultaneously rotates the fourth rotor 28. The first rotor 22 and the third rotor 25 are coaxially arranged, and the second rotor 24 and the fourth rotor 28 are coaxially arranged.

Referring to fig. 1, the first rotor 22 is carried by the first shaft 21, the first rotor 22 is used as a male rotor, and the first shaft 21 is in transmission connection with the motor 10. The first shaft 21 is rotatably connected to the first housing 30, the motor 10 can drive the first shaft 21 to rotate, and the first shaft 21 can rotate along the first axis of the first shaft 21 together with the first rotor 22 carried by the first shaft 21. That is, the first rotor 22 is rotatable within the first housing 30 along the first axis. In the embodiment of the present invention, the first rotor 22 may be integrally formed with the first shaft body 21. In other embodiments of the present invention, a portion of the first rotor 22 may be integrally formed with the first shaft 21, and a portion of the first rotor may be sleeved on the first shaft 21. In other embodiments of the present invention, the first rotor 22 can be directly sleeved on the first shaft 21.

Illustratively, the first rotor 22 may have at least two parts such as the first rotor 22 having a first working portion 221 and a second working portion 222, and both the first working portion 221 and the second working portion 222 may be integrally formed with the first shaft body 21. One of the first working portion 221 and the second working portion 222, such as the first working portion 221, may be integrally formed with the first shaft 21, and the other one, such as the second working portion 222, may be sleeved on the first shaft 21. Or the first working portion 221 and the second working portion 222 are both sleeved on the first shaft 21.

With continued reference to fig. 1, the first and second working

portions

221, 222 of the first rotor 22 may be helical lobes, which may also be referred to as male lobes. The number of the spiral leaves can be more than one. The first working portion 221 and the second working portion 222 of the present embodiment are configured to have opposite helical directions, i.e., the rotational directions of the first working portion 221 and the second working portion 222 are opposite. When the first rotor 22 and the second rotor 24 rotate in mesh with each other, an opposing axial force is generated between the first working portion 221 and the second working portion 222, which can also be understood as an opposing axial flow between the first working portion 221 and the second working portion 222.

It is to be noted that, in the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

With continued reference to fig. 1, the second rotor 24 is carried by the second shaft 23, the second rotor 24 serves as a female rotor, the second shaft 23 is configured to rotatably support the second rotor 24, such as the second shaft 23 is fixed on the first housing 30, and the second rotor 24 can rotate relative to the second shaft 23. The second rotor 24 is engaged with the first rotor 22. for example, the second rotor 24 may have at least two parts such as the second rotor 24 having a third working portion 241 and a fourth working portion 242, the third working portion 241 and the fourth working portion 242 may be both disposed on the second shaft 23, and the third working portion 241 and the fourth working portion 242 may rotate relative to the second shaft 23.

With continued reference to fig. 1, the third working portion 241 and the fourth working portion 242 of the second rotor 24 may be helical blades, which may also be referred to as female blades. The number of the spiral leaves can be more than one. The third working portion 241 and the fourth working portion 242 of the present embodiment are configured to have opposite helical directions, i.e., the third working portion 241 and the fourth working portion 242 have opposite rotational directions. When the first and

second rotors

22, 24 rotate in mesh with each other, an opposing axial force is generated between the third and fourth working

portions

241, 242, which may also be understood as an opposing axial flow between the third and fourth working

portions

241, 242. The third working portion 241 and the fourth working portion 242 may be driven by the first rotor 22 to rotate on the second shaft body 23 along the second axis of the second shaft body 23. It will be appreciated that the third working portion 241 is engaged with the first working portion 221 and the fourth working portion 242 is engaged with the second working portion 222. Wherein the third working portion 241 has a rotation direction opposite to that of the first working portion 221 and the fourth working portion 242 has a rotation direction opposite to that of the second working portion 222.

With continued reference to fig. 1, the third rotor 25 is carried by the third shaft 26, and the third rotor 25 is used as a male rotor, it can be understood that the third shaft 26 is rotatably connected to the second housing 60, the third shaft 26 is in transmission connection with the motor 10, and the motor 10 can drive the third shaft 26 to rotate along the third axis of the third shaft 26. The third rotor 25 meshes with the fourth rotor 28. The third rotor 25 may have at least two parts such as the third rotor 25 having a fifth working portion 251 and a sixth working portion 252, and each of the fifth working portion 251 and the sixth working portion 252 may be integrally formed with the third shaft body 26.

The fifth and sixth working

portions

251, 252 of the third rotor 25 may be helical lobes, which may also be referred to as male lobes. The number of the spiral leaves can be one or more. The fifth working part 251 and the sixth working part 252 of the present embodiment are configured to have opposite helical directions, i.e., the directions of rotation of the fifth working part 251 and the sixth working part 252 are opposite. As the third and

fourth rotors

25, 28 rotate in mesh with each other, an opposing axial force is generated between the fifth working portion 251 and the sixth working portion 252, which is also understood to be an opposing axial flow between the fifth working portion 251 and the sixth working portion 252.

With continued reference to fig. 1, the fourth rotor 28 is carried by a fourth shaft 27, the fourth shaft 27 is configured to rotatably support the fourth rotor 28, such as the fourth shaft 27 is fixed to the second housing 60, and the fourth rotor 28 can rotate relative to the fourth shaft 27. The fourth rotor 28 is engaged with the third rotor 25, and the fourth rotor 28 is driven by the third rotor 25 to rotate on the fourth shaft 27 along the fourth axis of the fourth shaft 27. The fourth rotor 28 may have at least two parts such as the fourth rotor 28 having a seventh working portion 281 and an eighth working portion 282, both the seventh working portion 281 and the eighth working portion 282 are sleeved on the fourth shaft body 27. The seventh working portion 281 and the eighth working portion 282 are both rotatable about a fourth axis within the second housing 60.

The seventh working portion 281 engages the fifth working portion 251 and the eighth working portion 282 engages the sixth working portion 252. Wherein the seventh working portion 281 has a rotation direction opposite to that of the fifth working portion 251 and the eighth working portion 282 has a rotation direction opposite to that of the sixth working portion 252.

The seventh and eighth working

portions

281, 282 of the fourth rotor 28 may be helical lobes, also referred to as female lobes. The number of the spiral leaves can be one or more. The seventh working portion 281 and the eighth working portion 282 of the embodiment of the present invention are configured to have opposite spiral directions, i.e., the spiral directions of the seventh working portion 281 and the eighth working portion 282 are opposite. As the third and

fourth rotors

25, 28 rotate in mesh with each other, an opposing axial force is generated between the seventh working portion 281 and the eighth working portion 282, which is also understood to be an opposing axial flow between the seventh working portion 281 and the eighth working portion 282.

The compressor 100 of the embodiment of the present invention is provided with the first rotor 22, the second rotor 24, the third rotor 25 and the fourth rotor 28, the first rotor 22 is coaxially disposed with the third rotor 25, the second rotor 24 is coaxially disposed with the fourth rotor 28, the first rotor 22 includes the first working portion 221 and the second working portion 222, the second rotor 24 includes the third working portion 241 and the fourth working portion 242, and is engaged with the second rotor 24 during the rotation of the first rotor 22, that is, the first working portion 221 is engaged with the third working portion 241, the second working portion 222 is engaged with the fourth working portion 242, so that the first rotor 22 and the second rotor 24 may form two sets of rotor pairs, and is engaged with the fourth rotor 28 during the rotation of the third rotor 25, that is, the fifth working portion 251 is engaged with the seventh working portion 281, the sixth working portion 252 is engaged with the eighth working portion 282, so that the third rotor 25 and the fourth rotor 28 may form two sets of rotor pairs, thus, four sets of rotor pairs can be formed by the cooperation of the first rotor 22, the second rotor 24, the third rotor 25 and the fourth rotor 28, the meshing of the first rotor 22, the second rotor 24, the third rotor 25 and the fourth rotor 28 of the embodiment of the present invention is equivalent to the merging of four screw compressors 100, and the compressor 100 of the embodiment of the present invention is more compact and has fewer parts than four independent screw compressors 100. The compressor 100 according to the embodiment of the present invention may not occupy an excessive space when increasing the discharge capacity.

In the embodiment of the present invention, only one motor 10 is used for driving, so that the compactness of the compressor 100 can be further improved, and the redundant parts can be reduced, so that the compressor 100 does not occupy too much space when increasing the displacement.

In some embodiments, referring to fig. 1, the first shaft 21 and the third shaft 26 are respectively disposed on two opposite sides of the motor 10, that is, the pair of rotors formed by the first rotor 22 and the second rotor 24 is located on one side of the motor 10, the pair of rotors formed by the third rotor 25 and the fourth rotor 28 is located on the other side of the motor 10, the motor 10 includes a first output end and a second output end which are oppositely disposed, the first shaft 21 is in transmission connection with the first output end, and the third shaft 26 is in transmission connection with the second output end. The first shaft 21 and the third shaft 26 can be synchronously driven to rotate by the first output end and the second output end of the motor 10, so that the rotor pair formed by the first rotor 22 and the second rotor 24 is driven, and the rotor pair formed by the third rotor 25 and the fourth rotor 28 is driven.

Illustratively, the motor 10 includes a motor stator 11 and a motor rotor 12, the motor rotor 12 is rotatable relative to the motor stator 11, the first shaft 21 is connected to one end of the motor rotor 12, and the third shaft 26 is connected to the other end of the motor rotor 12.

Wherein, for the first rotor 22 and the second rotor 24, when the first rotor 22 and the second rotor 24 are meshed with each other and rotate together, the opposite axial force can be generated due to the opposite rotation direction between the first working part 221 and the second working part 222, and the opposite rotation direction between the third working part 241 and the fourth working part 242, the axial force between the first working part 221 and the second working part 222 can be offset to some extent, and the axial force between the third working part 241 and the fourth working part 242 can be offset to some extent.

It should be noted, however, that in actual production processes, it has been found that, on the one hand, there are some differences in the construction of the different parts of the first rotor 22 and some differences in the construction of the different parts of the second rotor 24, due to manufacturing variations. And the first rotor 22 and the second rotor 24 may also differ from each other. The other side has tolerance and deviation problems due to assembly, which causes a certain difference in fit between the first rotor 22 and the second rotor 24. This in turn results in the impossibility of a complete cancellation of the axial forces between the first working portion 221 and the second working portion 222 and a complete cancellation of the axial forces between the third working portion 241 and the fourth working portion 242. The inability to rotate the first rotor 22 and the second rotor 24 in mesh with each other results in nearly complete cancellation of the axial forces, yet results in a resultant of the axial forces in random directions. As shown, the resultant axial force may be directed in the first direction H1, and the resultant axial force may be directed in the second direction H2.

On the other hand, in the quantification of the compressors, the resultant axial force generated by the rotors in each compressor is different in direction due to the difference between the rotors in each compressor, for example, the resultant axial force of the rotors in some compressors is directed toward the first direction H1, and the resultant axial force of the rotors in some compressors is directed toward the second direction H2. The rotor shaft system is provided with a rotor shaft, and the rotor shaft system is provided with a rotor shaft, wherein the rotor shaft is provided with a rotor shaft, the rotor shaft and the rotor shaft is provided with a side rotor shaft, the rotor shaft is in the rotor shaft, the rotor shaft is in the rotor shaft, the rotor shaft and the rotor shaft, the rotor shaft is in the rotor shaft, the rotor shaft is in the rotor shaft, the rotor shaft and the rotor shaft, the rotor. It will be appreciated that the same is true for the third rotor 25 and the fourth rotor 28.

In the related art, in order to ensure that all the molded compressors can stably operate, two sets of thrust bearings (or axial force bearings) are sleeved on each shaft body of the compressors to limit the resultant axial force of the rotors in all the molded compressors, so as to ensure that all the molded compressors can stably operate.

Therefore, the bearing limit of the thrust bearing is still inevitably needed, and due to the randomness of the resultant force direction, the thrust bearing needs to meet the requirement that the bearing limit can be carried in both directions, that is, in order to ensure the limitation of the resultant force of the axial force of the rotor in the actual production and processing process of the compressor, the thrust bearings (axial force bearings) in both directions still need to be limited on one rotating shaft, for example, two groups of thrust bearings with opposite bearing directions are arranged in the compressor, so that the resultant force of the axial force in both directions which occurs randomly is ensured to be carried. For an independent compressor individual, the direction of the resultant force of the axial force which randomly occurs is always unchanged, one group of thrust bearings is used for limiting, and the other group of thrust bearings is completely idle, so that the cost performance is low, redundant mechanical loss and lubricating oil demand are added, and the failure rate of the compressor is increased. Finally, the size and the cost of the compressor assembly are increased, the mechanical efficiency of shafting operation is reduced to a certain extent, and the requirement of lubricating oil quantity is increased.

Based on this, the pair of rotors formed by the first rotor 22 and the second rotor 24 is located on one side of the motor 10, and the pair of rotors formed by the third rotor 25 and the fourth rotor 28 is located on the other side of the motor 10 as shown in fig. 1. The compressor 100 of the embodiment of the present application is configured to: during the rotation of the first rotor 22, there is a force in the axial direction of the first shaft body 21 and toward the preset direction, and during the rotation of the third rotor 25, there is a force in the axial direction of the third shaft body 26 and toward the preset direction or opposite to the preset direction. The particular direction of the unidirectional axial force during operation of the first rotor 22 may thus be determined to facilitate taking relevant action to limit the unidirectional axial force. And the specific direction of the unidirectional axial force during operation of the third rotor 25 can be determined so that relevant measures can be taken to limit the unidirectional axial force. Compared with the prior art, can not need all to restrict the both ends of first axis body 21 and the both ends of third axis body 26, and can only restrict the one end of first axis body 21 and the one end to second axis body 23 to the effect direction of this axial force, reduced the use of spare part, the effectual structure size who reduces compressor 100. For example, in comparison with the prior art in which two thrust bearings are used to limit a single rotor structure, the embodiment of the present invention may employ a single thrust bearing 50 to limit a single rotor structure to enable stable operation.

Referring to fig. 2, fig. 2 is a partial schematic view illustrating a first hydraulic device disposed on the first shaft in fig. 1. In order to ensure that the first rotor 22 has an acting force along the axial direction of the first shaft body 21 and towards a preset direction during the rotation of the first rotor 22, the first hydraulic device 40 is arranged on the first shaft body 21, and the acting force along the axial direction of the first shaft body 21 and towards the preset direction is applied to the first shaft body 21 through the first hydraulic device 40, so that the first rotor 22 and the second rotor 24 have a definite axial force resultant force in a single axial direction when the first rotor 22 and the second rotor 24 are meshed with each other to rotate together. Therefore, the thrust bearing 50 is only required to be arranged at one end of the first shaft body 21 in the embodiment of the present invention, so as to achieve the limitation of the resultant force of the axial force in the determined single axial direction, and it can be understood that the thrust bearing 50 can limit the first shaft body 21 from moving in the direction of the acting force, so as to ensure that the first rotor 22 and the second rotor 24 of the compressor 100 in the embodiment of the present invention can stably rotate without causing the exhaust end face of the rotor to contact and rub with the end face of the first housing 30. Compared with the related art in which two thrust bearings are required to be fixed to both ends of one shaft body, the compressor 100 according to the embodiment of the present invention can save a plurality of thrust bearings 50, and can reduce the overall size and cost of the compressor 100. Meanwhile, the reduction of the number of the thrust bearings 50 can improve the efficiency of shafting operation to a certain extent and reduce the requirement of lubricating oil quantity.

It is understood that the first shaft body 21 has a first end portion and a second end portion which are oppositely arranged, the first working portion 221 and the second working portion 222 are located between the first end portion and the second end portion, and the first hydraulic device 40 may be arranged on the first end portion or the second end portion of the first shaft body 21, as long as it can apply a force to the first shaft body 21 along the axial direction of the first shaft body 21 and towards a preset direction. For example, the preset direction may be a direction along the axial direction of the first shaft body 21 and toward the motor 10, and at this time, a direction along the axial direction of the first shaft body 21 and toward the motor 10 may be defined as a first direction H1, and a direction opposite to the first direction H1 may be defined as a second direction H2. For example, the first hydraulic device 40 is disposed at one end of the first shaft body 21 close to the motor 10, and the first hydraulic device 40 applies a preset acting force in the first direction H1 to the first shaft body 21, it can be understood that the preset acting force in the first direction H1 applied by the first hydraulic device 40 needs to be: the first shaft body 21 can be made to have the resultant axial force along the first direction H1, and the first rotor 22 and the second rotor 24 have the determined resultant axial force facing the first direction H1, and then the resultant axial force in the determined direction can be limited by taking relevant measures according to the resultant axial force in the determined direction, such as providing a thrust bearing 50 at one end of the first shaft body 21, and limiting the resultant axial force in the determined direction by the thrust bearing 50. Since the space of the end of the first shaft 21 close to the motor 10 is narrow, the thrust bearing 50 may be installed at the end of the first shaft 21 away from the motor 10 to facilitate the installation of the thrust bearing 50. Of course, if the space allows, the thrust bearing 50 may be disposed at one end of the first shaft body 21 close to the motor 10, and it is understood that the specific location of the thrust bearing 50 may be selected according to the specific situation, as long as it can play a role of limiting the movement of the first shaft body 21 in the direction of the force.

In order to more clearly explain the structure of the first hydraulic device 40, a specific structure of the first hydraulic device 40 will be described below with reference to the drawings.

For example, the first hydraulic device 40 of the embodiment of the present invention may apply the force by using high-pressure oil, and of course, other liquids that do not have a great influence on the compressor 100 may be used, and the present invention is not limited thereto.

As shown in fig. 2, the first hydraulic device 40 may include a cylinder 401 and a piston 402, the cylinder 401 is fixedly disposed outside the first housing 30, one end of the first shaft 21 penetrates the first housing 30 and is disposed in the cylinder 401, the piston 402 is disposed on the first shaft 21 and is located in the cylinder 401, wherein the piston 402 divides the cylinder 401 into a first space 4011 and a second space 4012, the second space 4012 is used for injecting a liquid such that the pressure of the second space 4012 is higher than the pressure of the first space 4011, a pressure difference is formed between the second space 4012 and the first space 4011, the liquid exerts a force on the piston 402 in a direction toward the first space 4011, since the piston 402 is provided on the first shaft body 21, the force can also act on the first shaft body 21, that is, a pressure difference is formed between the second space 4012 and the first space 4011 such that the first shaft body 21 has a force along an axial direction of the first shaft body 21 and toward a predetermined direction. Exemplarily, first space 4011 is located the piston 402 and is close to one side of motor 10, second space 4012 is located the piston 402 and deviates from one side of motor 10, be provided with inlet 4013 on the cylinder body 401, inlet 4013 communicates with second space 4012, inlet 4013 can external oil pump this moment, high-pressure oil is injected into through this inlet 4013 into second space 4012 to the oil pump to the pressure energy that high-pressure oil was used on piston 402 can transmit for first axis body 21 through piston 402, and then make first axis body 21 have along the axial of first axis body 21 and towards the effort of first space 4011 direction (i.e. towards the effort of first direction H1).

Certainly, in other embodiments, also can be that first space is located the one side that the piston deviates from the motor, and the second space is located the one side that the piston is close to the motor, is provided with the inlet on the cylinder body, inlet and second space intercommunication, and the inlet can external oil pump this moment, and high-pressure oil is injected into to the second space through this inlet to the oil pump to the pressure that high-pressure oil was used in on the piston can be transmitted for first axis body through the piston, and then makes first axis body have the axial of following first axis body and towards the effort of second direction H2.

Wherein, in order to make full use of the spatial structure of rotor subassembly, can combine feed liquor passageway and axis body, for example, as shown in fig. 2, set up the first passageway 232 that link up along the axial of second axis body 23 on second axis body 23, second axis body 23 can be made hollow structure promptly, the one end and the inlet 4013 intercommunication of first passageway 232, the one end that first passageway 232 is kept away from inlet 4013 can be used for the feed liquor, the first passageway 232 circulation that the high-pressure oil can be through second axis body 23 to inlet 4013 department promptly.

For example, with continued reference to fig. 2, the first housing 30 may include a first housing body 301, a first end cover 302 and a second end cover 303, the first housing body 301 is used for accommodating the first rotor 22 and the second rotor 24, the first end cover 302 is disposed on one side of the first housing body 301, the second end cover 303 is disposed on the other side of the first housing body 301, such as the first end cover 302 is disposed on one side of the first housing body 301 close to the electric motor 10, the second end cover 303 is disposed on one side of the first housing body 301 far from the electric motor 10, one end of the second shaft 23 is connected to the first end cover 302, the other end of the second shaft 23 is connected to the second end cover 303, and the thrust bearing 50 may be disposed on the first end cover 302 or the second end cover 303, such as the thrust bearing 50 is disposed on the second end cover 303.

As shown in fig. 2, in order to facilitate the flow of liquid, the first end cap 302 is provided with a second passage 3021, the cylinder body 401 is disposed on the first end cap 302, the liquid inlet 4013 on the cylinder body 401 is communicated with one end of the second passage 3021, and the other end of the second passage 3021 is communicated with the first passage 232 of the second shaft body 23, so that external high-pressure oil can flow from the first passage 232 into the second space 4012.

Since the piston 402 is pressurized by the liquid, in order to prevent the liquid from leaking out of the cylinder 401, a sealing structure may be provided at a connection portion between the first shaft 21 and the cylinder 401, it can be understood that the first shaft 21 and the cylinder 401 are rotatably connected, please refer to fig. 3, and fig. 3 is a first partial schematic view of a connection portion between the first shaft and the cylinder in fig. 2. Labyrinth seal can be adopted at the joint of the first shaft body 21 and the cylinder body 401, namely, a plurality of annular seal teeth 4014 which are arranged in sequence can be arranged on the cylinder body 401, a series of closure gaps and expansion cavities are formed between the teeth, and the liquid generates throttling effect when passing through the gaps of the zigzag labyrinth, thereby achieving the purpose of leakage resistance. Of course, several annular seal teeth 4014 arranged in sequence may be provided on the first shaft body 21. In other embodiments, please refer to fig. 4, fig. 4 is a second partial schematic view of a connection between the first shaft and the cylinder in fig. 2. A gap seal may be employed at the connection of the first shaft body 21 and the cylinder body 401, that is, a sealing function with a slight gap between the moving members. Because the clearance exists between the matching parts, the friction force is small, the heat generation is less, the service life is long, and the structure is simple and compact and the size is small because no sealing material is used. In other embodiments, please refer to fig. 5, fig. 5 is a third partial schematic view of a connection between the first shaft and the cylinder in fig. 2. The connection between the first shaft body 21 and the cylinder body 401 may be sealed by using a sealing ring 403, that is, a first sealing groove 212 for mounting the sealing ring 403 may be disposed on the first shaft body 21, the sealing ring 403 is sleeved in the first sealing groove 212, and the sealing between the first shaft body 21 and the cylinder body 401 is realized by using the sealing ring 403, wherein the sealing ring 403 may be an O-ring. In another embodiment, please refer to fig. 6, fig. 6 is a fourth partial schematic view of a connection between the first shaft and the cylinder in fig. 2. The connection between the first shaft 21 and the cylinder 401 may be sealed by using a slip ring 404, that is, the first shaft 21 may be provided with a second sealing groove 213 for installing the slip ring 404, the slip ring 404 is sleeved in the second sealing groove 213, and the slip ring 404 is used to seal the first shaft 21 and the cylinder 401.

It can be understood that, since the cylinder block 401 is finally sealed in the casing of the compressor 100, there may be a slight leakage at the connection between the first shaft 21 and the cylinder block 401, that is, a small amount of leaked liquid enters the circulation of the compressor 100 without causing a great influence on the compressor 100, and at this time, there is no need to make an excessive requirement on the sealing performance at the connection between the first shaft 21 and the cylinder block 401.

The first shaft 21 is driven to rotate by the motor 10, and at this time, the piston 402 may be configured to rotate together with the first shaft 21, that is, the piston 402 is fixedly disposed on the first shaft 21, the piston 402 is movable relative to the cylinder 401, and in order to prevent the liquid in the second space 4012 from flowing to the first space 4011, the piston 402 is disposed in a sealed manner with the inner side wall of the cylinder 401. For example, a labyrinth seal may be used between the piston 402 and the cylinder 401, or a clearance seal may be used between the piston 402 and the cylinder 401. It can be understood that there is no need for an excessive requirement for the sealing between the piston 402 and the inner side wall of the cylinder 401, that is, the liquid in the second space 4012 may leak into the first space 4011 in a small amount, and as long as the leakage amount of the liquid is significantly smaller than the supply amount of the liquid, the liquid may exert a sufficient pressure on the piston 402, that is, the hydraulic device may act to exert a force on the piston 402 in the axial direction of the first shaft body 21 and toward the predetermined direction.

The piston 402 is fixedly disposed on the first shaft 21, and the piston 402 and the first shaft 21 are in interference fit. As shown in fig. 2, the first shaft body 21 may be provided with a positioning shoulder 214, the piston 402 may abut against the positioning shoulder 214, a fastening member 405 may be provided on a side of the piston 402 facing away from the positioning shoulder 214, and the fastening member 405 may fix the piston 402 to the first shaft body 21 together with the positioning shoulder 214. Wherein the fastener 405 may be a nut that is tightened onto the first shaft body 21 and that cooperates with the locating shoulder 214 to secure the piston 402 to the first shaft body 21.

The above is a specific fitting relationship between the first hydraulic device 40 and the first shaft body 21 and the first housing 30. It should be understood that, referring to fig. 7, fig. 7 is a partial schematic view of a second hydraulic device disposed on the third shaft in fig. 1. In order that the third rotor 25 has an acting force along the axial direction of the third shaft 26 and toward a preset direction (such as the first direction H1) or opposite to the preset direction (such as the second direction H2) during the rotation of the third rotor 25, the embodiment of the present invention provides the second hydraulic device 70 on the third shaft 26, and the second hydraulic device 70 applies an acting force along the axial direction of the third shaft 26 and toward the preset direction to the third shaft 26, so as to ensure that the third rotor 25 and the fourth rotor 28 have a definite resultant axial force in a single axial direction when the third rotor 25 and the fourth rotor 28 are meshed with each other and rotate together. Thus, the embodiment of the present invention can limit the resultant axial force in the determined single axial direction only by providing the thrust bearing 50 at one end of the third shaft body 26. It should be understood that the specific structure of the second hydraulic device 70 and the specific matching relationship between the second hydraulic device 70 and the second housing 60 and the third shaft 26 are substantially the same as the first hydraulic device 40, and reference may be made to the above description of the first hydraulic device 40, so that the detailed description thereof is omitted.

Unlike the first rotor 22 and the second rotor 24 forming a rotor pair on one side of the motor 10 and the third rotor 25 and the fourth rotor 28 forming a rotor pair on the other side of the motor 10, in some other embodiments, as shown in fig. 8, fig. 8 is a partial schematic view of a second structure of the compressor provided by the embodiment of the present invention. The first shaft body 21 and the third shaft body 26 are arranged on the same side of the motor 10, the first shaft body 21 is in transmission connection with the output end of the motor 10, and the third shaft body 26 is fixedly connected with the first shaft body 21, that is, a rotor pair formed by the first rotor 22 and the second rotor 24 and a rotor pair formed by the third rotor 25 and the fourth rotor 28 are arranged on the same side of the motor 10. The third shaft 26 may be fixedly connected to the first shaft 21 by a coupling, or the third shaft 26 and the first shaft 21 may be integrally formed, that is, the third shaft 26 and the first shaft 21 are the same shaft.

At this time, in order to reduce the use of the thrust bearing 50, it can be understood that, during the rotation of the first rotor 22 and the third rotor 25, there is a resultant force in the axial direction of the first shaft body 21 and toward a predetermined direction. The resultant force may also be provided using hydraulic means.

For example, referring to fig. 9 in conjunction with fig. 8, fig. 9 is a partial schematic view of a case where a third hydraulic device is disposed on the first shaft in fig. 8. A third hydraulic device 80 may be disposed on the first shaft body 21 for applying a force to the first shaft body 21 in the axial direction of the first shaft body 21 and in a predetermined direction, so that the first shaft body 21 and the third shaft body 26 have a resultant force in the predetermined direction. The predetermined direction may be the first direction H1 or the second direction H2. The third hydraulic device 80 applies a force to the first shaft body 21 in the axial direction of the first shaft body 21 and in a predetermined direction, so that when the first rotor 22 and the second rotor 24 are meshed with each other to rotate together and the third rotor 25 and the fourth rotor 28 are meshed with each other to rotate together, the first rotor 22, the second rotor 24, the third rotor 25 and the fourth rotor 28 have a definite resultant axial force in a single axial direction. It can be understood that the specific structure of the third hydraulic device 80 and the specific matching relationship between the third hydraulic device 80 and the first shaft 21 are substantially the same as the first hydraulic device 40, and specific reference may be made to the above description of the first hydraulic device 40, so that the detailed description thereof is omitted.

Illustratively, a fourth hydraulic device (not shown) may also be provided on the third shaft body 26, such as may be located at position a (shown in fig. 8), where position a is between the first rotor 22 and the third rotor 25. Of course, the fourth hydraulic device may also be arranged at the end of the third shaft body 26 remote from the first rotor 22. The fourth hydraulic device is configured to apply an acting force to the third shaft body 26 along the axial direction of the third shaft body 26 and toward the preset direction, so that the first shaft body 21 and the third shaft body 26 have a resultant force along the preset direction. The predetermined direction may be the first direction H1 or the second direction H2. It can be understood that the specific structure of the fourth hydraulic device and the specific matching relationship between the fourth hydraulic device and the third shaft 26 are substantially the same as the first hydraulic device 40, and specific reference may be made to the description of the first hydraulic device 40, so that no further description is given here.

In other embodiments, when the first shaft 21 and the third shaft 26 are disposed on the same side of the motor 10, that is, the pair of rotors formed by the first rotor 22 and the second rotor 24 and the pair of rotors formed by the third rotor 25 and the fourth rotor 28 are disposed on the same side of the motor 10, the second working portion 222 of the first rotor 22 and the fifth working portion 251 of the third rotor 25 may be disposed as close as possible, and the fourth working portion 242 of the second rotor 24 and the seventh working portion 281 of the fourth rotor 28 may be disposed as close as possible, so as to improve the compactness of the compressor 100 and further reduce the space occupied by the compressor 100.

Embodiments of the present invention also provide an air conditioner including the compressor 100 as defined in combination with one or more of the above embodiments.

In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.

The compressor and the air conditioner provided by the embodiment of the present invention are described in detail above, and the principle and the embodiment of the present invention are explained herein by applying a specific example, and the description of the above embodiment is only used to help understanding the method and the core idea of the present invention; meanwhile, for those skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.

Claims

1. A compressor, comprising:

a first shaft body carrying the first working part and the second working part;

2. The compressor of claim 1, further comprising a motor, wherein the first shaft and the third shaft are disposed on opposite sides of the motor, the motor includes a first output and a second output, the first shaft is in driving connection with the first output, and the third shaft is in driving connection with the second output.

3. The compressor of claim 2, wherein during rotation of the first rotor, there is a force in an axial direction of the first shaft body and toward a preset direction, and during rotation of the third rotor, there is a force in an axial direction of the third shaft body and toward the preset direction or opposite to the preset direction.

4. The compressor of claim 3, further comprising a first hydraulic device and a second hydraulic device, wherein the first hydraulic device is disposed on the first shaft body and is used for applying a force to the first shaft body along the axial direction of the first shaft body and towards a preset direction; the second hydraulic device is arranged on the third shaft body and used for applying acting force to the third shaft body along the axial direction of the third shaft body and towards the preset direction or opposite to the preset direction.

5. The compressor of claim 1, further comprising a motor, wherein the first shaft and the third shaft are disposed on the same side of the motor, the first shaft is in transmission connection with an output end of the motor, and the third shaft is fixedly connected with the first shaft.

6. The compressor according to claim 5, wherein, during rotation of the first rotor and the third rotor, there is a resultant force in an axial direction of the first shaft body and toward a preset direction.

7. The compressor of claim 6, further comprising a third hydraulic device disposed on the first shaft body for applying a force to the first shaft body along an axial direction of the first shaft body and toward a preset direction, so that the first shaft body and the third shaft body have a resultant force along the preset direction.

8. The compressor of claim 6, further comprising a fourth hydraulic device disposed on the third shaft body for applying a force to the third shaft body in an axial direction of the third shaft body and in a preset direction, so that the first shaft body and the third shaft body have a resultant force in the preset direction.

9. The compressor of claim 5, wherein the first shaft body is integrally formed with the third shaft body.

10. An air conditioner characterized by comprising the compressor according to any one of claims 1 to 9.