CN215256796U

CN215256796U - Rotor subassembly, compressor and air conditioner

Info

Publication number: CN215256796U
Application number: CN202120433606.XU
Authority: CN
Inventors: 龙忠铿; 武晓昆; 唐晗
Original assignee: Gree Electric Appliances Inc of Zhuhai
Current assignee: Gree Electric Appliances Inc of Zhuhai
Priority date: 2021-02-26
Filing date: 2021-02-26
Publication date: 2021-12-21
Anticipated expiration: 2031-02-26

Abstract

The utility model discloses a rotor subassembly, compressor and air conditioner, the rotor subassembly includes first pivot and the first rotor that rotationally sets up on first pivot, and first rotor includes a plurality of first helical blade, forms first tooth's socket between two adjacent first helical blade; be equipped with at least one through the end of breathing in at first rotor and get rid of the oil groove, get rid of the oil groove and be used for getting into first tooth's socket with emollient through getting rid of the oil groove to can ensure that emollient can fully lubricate and sealed first tooth's socket, make the compressor operation more smooth and easy, reduced helical blade's wearing and tearing, improved the life of compressor.

Description

Rotor subassembly, compressor and air conditioner

Technical Field

The utility model relates to a compressor technical field, concretely relates to rotor subassembly, compressor and air conditioner.

Background

The opposed four-rotor screw compressor comprises two pairs of screw rotors, each pair of screw rotors is arranged in the space volume of a shell of the screw compressor, wherein each pair of screw rotors respectively comprises a female rotor and a male rotor which are parallel and have opposite rotation directions, and the female rotor and the male rotor are meshed. The volume can be periodically increased and decreased in the rotating process of the two pairs of spiral rotors, and the volume is periodically communicated with and closed to the air inlet and the air outlet through reasonable design, so that the whole process of air suction, compression and air exhaust can be completed.

During the rotation of each pair of meshed female rotor and male rotor, the meshing part of the female rotor and the male rotor needs to be lubricated because the meshing part of the female rotor and the male rotor is easy to generate friction. However, the existing opposed four-rotor screw compressor does not disclose an effective measure for lubricating the meshing part of the female rotor and the male rotor, and the lubricant cannot flow into the rotor tooth grooves, so that the rotor tooth grooves are not lubricated by the lubricant.

Accordingly, there are drawbacks in the prior art and improvements are needed.

SUMMERY OF THE UTILITY MODEL

An embodiment of the utility model provides a rotor subassembly, compressor and air conditioner can solve current rotor subassembly and can't carry out lubricated technical problem to negative rotor and positive rotor meshing department.

An embodiment of the utility model provides a rotor assembly, rotor assembly includes:

a first rotating shaft; and

the first rotor is rotatably arranged on the first rotating shaft;

the first rotor comprises a plurality of first spiral blades, and a first tooth groove is formed between every two adjacent first spiral blades; the first rotor comprises a suction end, the suction end is provided with at least one oil throwing groove, and the oil throwing groove is used for enabling lubricant to enter the first tooth groove through the oil throwing groove.

According to the utility model discloses the rotor subassembly that provides, the rotor subassembly still includes:

a second rotating shaft; and

the second rotor is fixedly arranged on the second rotating shaft, is meshed with the first rotor and is used for driving the first rotor to rotate relative to the first rotating shaft, and the first rotor and the second rotor rotate along opposite directions; the second rotor comprises a plurality of second helical blades, and a second tooth slot is formed between every two adjacent second helical blades.

According to an embodiment of the present invention, there is provided a rotor assembly comprising two of the first rotors and two of the second rotors;

the two first rotors are coaxially arranged on the first rotating shaft, and the thread turning directions of the two first rotors are opposite; the two second rotors are coaxially fixed on the second rotating shaft, and the thread turning directions of the two second rotors are opposite.

According to the utility model provides a rotor subassembly, two first rotor the induction end interengagement, two first rotor the at least one end of induction end is equipped with at least one get rid of the oil groove.

According to the utility model provides a rotor subassembly, get rid of the oil groove and set up in adjacent two first helical blade's handing-over department.

According to the utility model provides a rotor subassembly, get rid of the oil groove and set up in on the first helical blade.

According to the utility model provides a rotor subassembly, the end of breathing in still be equipped with at least one with get rid of the trapped fuel chamber of oil groove intercommunication, the trapped fuel chamber passes through get rid of the oil groove with first tooth's socket is linked together.

According to the utility model provides a rotor subassembly, it is certainly to save the oil pocket first helical blade is close to the one end of breathing in is to keeping away from the sunken formation of one end of breathing in.

According to the utility model provides a rotor subassembly, first pivot is inside seted up a main oil circuit and at least one with the branch oil circuit of main oil circuit intercommunication, first rotor with be formed with lubricated clearance between the first pivot, lubricated clearance with a oil circuit reaches get rid of the oil groove intercommunication.

According to the rotor assembly provided by the embodiment of the utility model, the rotor assembly further comprises a plurality of supporting bearings, the supporting bearings are sleeved on the first rotating shaft and bear the first rotor, and the supporting bearings and the first rotor can rotate relative to the first rotating shaft;

and a gap is formed between every two adjacent supporting bearings, and the gap is communicated with the branch oil way and the lubricating gap.

According to the utility model provides a rotor subassembly, first rotor orientation be equipped with on the inner wall of first pivot with the oil storage tank of lubricated clearance intercommunication.

the first bearing shell is arranged at one end of the second rotating shaft, a first bearing cavity is arranged between the first bearing shell and the second rotating shaft, and a first bearing arranged on the second rotating shaft is accommodated in the first bearing cavity;

the flow dividing piece comprises a main oil inlet, a first oil outlet and a second oil outlet, two ends of the first oil outlet are respectively communicated with the main oil inlet and the main oil way, and two ends of the second oil outlet are respectively communicated with the main oil inlet and the first bearing cavity; and

and the rotor shell is used for accommodating the first rotor and the second rotor, and a first oil return port communicated with the first bearing cavity and the second tooth groove is arranged on the rotor shell.

the second bearing shell is arranged at the other end of the second rotating shaft, a second bearing cavity is formed between the second bearing shell and the second rotating shaft, and a second bearing arranged on the second rotating shaft is accommodated in the second bearing cavity;

the oil control part comprises a third oil outlet, and two ends of the third oil outlet are respectively communicated with the main oil way and the second bearing cavity; and

and the second oil return port is arranged on the rotor shell and communicated with the second bearing cavity and the second gear groove.

An embodiment of the utility model provides a compressor, including above-mentioned rotor subassembly.

An embodiment of the utility model provides an air conditioner, including above-mentioned compressor.

The utility model provides a rotor subassembly, compressor and air conditioner, the rotor subassembly includes first pivot and the first rotor that rotationally sets up on first pivot, and first rotor includes a plurality of first helical blade, forms first tooth's socket between two adjacent first helical blade; be equipped with at least one through the end of breathing in at first rotor and get rid of the oil groove, get rid of the oil groove and be used for getting into first tooth's socket with emollient through getting rid of the oil groove to can ensure that emollient can fully lubricate and sealed first tooth's socket, make the compressor operation more smooth and easy, reduced helical blade's degree of wear, improved the life of compressor.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a rotor assembly provided in an embodiment of the present invention.

Fig. 2 is a first cross-sectional view of a first rotor and a first shaft of the rotor assembly shown in fig. 1.

Fig. 3 is a first structural diagram of a suction end of a first rotor in the rotor assembly shown in fig. 1.

Fig. 4 is a second structural view of a suction end of a first rotor in the rotor assembly shown in fig. 1.

Fig. 5 is a third structural view of a suction end of a first rotor in the rotor assembly shown in fig. 1.

Fig. 6 is a second cross-sectional view of the first rotor and the first shaft of the rotor assembly of fig. 1.

Fig. 7 is a schematic view of the structure of bearing pads supporting bearings in the rotor assembly shown in fig. 1.

Fig. 8 is a schematic structural diagram of the first rotor, the second rotor and the rotor housing according to an embodiment of the present invention.

Description of reference numerals:

10. a rotor assembly;

11. a first rotating shaft; 12. a first rotor; 121. a first helical blade; 122. a first tooth slot; 123. a suction end; 124. an oil throwing groove; 125. an oil storage cavity; 111. a main oil path; 112. a branch oil path; 126. lubricating the gap; 127. a support bearing; 1271. a gap; 1272. bearing bushes; 1273. a communicating hole; 1274. a through groove; 128. an oil storage tank;

21. a second rotating shaft; 22. a second rotor; 221. a second helical blade; 222. a second tooth slot;

23. a first bearing housing; 24. a second bearing housing; 25. a first bearing cavity; 26. a second bearing cavity; 27. a first bearing; 28. a second bearing;

30. a flow divider; 31. a main oil inlet; 32. a first oil outlet; 33. a second oil outlet;

40. a rotor housing; 41. a first oil return port; 42. a second oil return port;

50. an oil control member; 51. third oil outlet

60. A first oil return member; 70. and a second oil return member.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without creative efforts belong to the protection scope of the present invention. Furthermore, it is to be understood that the description herein of specific embodiments is for purposes of illustration and explanation only and is not intended to limit the present disclosure. In the present invention, unless otherwise specified, the use of directional terms such as "upper" and "lower" generally means upper and lower in the actual use or operation of the device, and specifically, the direction of the drawing in the drawings; while "inner" and "outer" are with respect to the outline of the device.

The embodiment of the utility model provides a rotor subassembly, compressor and air conditioner. The following are detailed below. It should be noted that the following description of the embodiments is not intended to limit the preferred order of the embodiments.

The utility model provides a rotor subassembly is applied to the compressor, specifically please refer to fig. 1 and fig. 2. The rotor assembly 10 includes a first rotating shaft 11 and a first rotor 12, and the first rotor 12 is rotatably disposed on the first rotating shaft 11. The first rotor 12 includes a plurality of first helical blades 121, a first tooth slot 122 is formed between two adjacent first helical blades 121, the first rotor 12 is formed by splicing the plurality of first helical blades 121, and bottoms of the plurality of first helical blades 121 are connected with each other and sleeved on the first rotating shaft 11.

Referring to fig. 3, the first rotor 12 includes a suction end 123, and at least one oil slinger 124 is disposed on the suction end 123, and the oil slinger 124 is used for introducing lubricant into the first tooth slot 122 through the oil slinger 124, so as to effectively lubricate and seal the first tooth slot 122, so that the compressor runs more smoothly, wear of the helical blades is reduced, and the service life of the compressor is prolonged.

The rotor assembly 10 further includes a second rotating shaft 21 and a second rotor 22, the second rotor 22 can rotate around the axis of the second rotating shaft 21, and the second rotating shaft 21 is parallel to the first rotating shaft 11. The second rotor 22 is fixedly disposed on the second rotating shaft 21, the second rotor 22 and the first rotor 12 are engaged with each other to compress gas, and the first rotor 12 and the second rotor 22 rotate in opposite directions.

It is understood that the first rotor 12 is a driven rotor and the second rotor 22 is a driving rotor, i.e. the second rotor 22 drives the first rotor 12 to rotate. The embodiment of the utility model provides a can be for first rotor 12 is the negative rotor, second rotor 22 is the positive rotor, also can for first rotor 12 is the positive rotor, second rotor 22 is the negative rotor.

Specifically, the second rotor 22 includes a plurality of second helical blades 221, a second tooth slot 222 is formed between two adjacent second helical blades 221, the second rotor 22 is formed by splicing the plurality of second helical blades 221, bottoms of the plurality of second helical blades 221 are connected with each other and sleeved on the second rotating shaft 21, and a meshing area between the second helical blade 221 and the first helical blade 121 is a rotor tooth tip volume.

As can be appreciated, since lubricant can enter the first tooth grooves 122 through the oil slinger 124, lubricant can also enter the second tooth grooves 222, thereby enabling lubrication of the second rotor 22.

In an embodiment of the present invention, the oil-throwing groove 124 is disposed at the junction of two adjacent first helical blades 121, that is, the oil-throwing groove 124 is disposed at the bottom end of the first tooth space 122, and it should be noted that the "junction" may be a position where one helical blade adjoins another helical blade, or a position where two helical blades respectively have a part to form. At this time, the path of the oil slinger 124 is shortest so that the lubricant can rapidly enter the first tooth slot 122 through the oil slinger 124.

In an embodiment of the present invention, please refer to fig. 5, the oil-throwing groove 124 is disposed on the first helical blade 121, and two adjacent oil-storing cavities 125 are connected. On one hand, when the lubricant oil inlet flow rate is too fast, the oil inlet speed can be delayed due to the long path of the oil slinger 124; on the other hand, the lubricant in the oil storage chamber 125 can be quickly pressed to the first tooth groove 122 due to the increase in pressure.

In an embodiment of the present invention, the first rotor 12 may be made of a self-lubricating non-metallic material, and the first rotating shaft 11 may be made of a hard alloy material; of course, the first rotor 12 may be made of a hard alloy material, and the first rotating shaft 11 may be made of a self-lubricating non-metallic material.

In an embodiment of the present invention, the second rotor 22 may be made of a self-lubricating non-metallic material. When the first rotor 12 is made of a hard alloy steel material and the second rotor 22 is made of a self-lubricating non-metallic material, the first rotor 12 and the second rotor 22 are engaged with each other by the metal and the non-metallic material, so that the smoothness of transmission is improved, and the vibration and noise of the rotor assembly 10 in the operation process are reduced.

In an embodiment of the present invention, the rotor assembly 10 may also be composed of two pairs of intermeshing rotors. Specifically, the rotor assembly 10 includes two first rotors 12 and two second rotors 22, the two first rotors 12 are coaxially disposed on the first rotating shaft 11, the thread directions of the two first rotors 12 are opposite, and the two first rotors 12 are symmetrically disposed. The two second rotors 22 are coaxially fixed on the second rotating shaft 21, the thread directions of the two second rotors 22 are opposite, and the two second rotors 22 are symmetrically arranged. The end surfaces of the two first rotors 12 close to each other are engaged, and the end surfaces of the two second rotors 22 close to each other are engaged, so that the rotor assembly 10 sucks air from the engagement, the air flows to the first rotors 12 on both sides respectively to be compressed and exhausted, and the lubricant flowing into the first tooth grooves 122 and the second tooth grooves 222 through the oil slinger 124 can be compressed along with the air and exhausted from the exhaust end surfaces of the first rotors 12 and the second rotors 22, so that lubrication of all the first tooth grooves 122 and the second tooth grooves 222 can be completed. Wherein, the compression capacity of the first rotor 12 and the second rotor 22 is equivalent to that of one group of common rotors, the compression capacity of the first rotor 12 and the second rotor 22 is equivalent to that of the other two groups of common rotors, and the volume is much smaller than that of the two groups of common rotors, so that the structure of the whole rotor assembly 10 is more compact. It should be noted that, according to actual needs, the oil slinger 124 may be provided only on one of the two first rotors 12, or the oil slinger 124 may be provided on both the two first rotors 12, so as to further increase the oil discharge speed.

It can be understood that, referring to fig. 4 and 5, the first rotor 12 needs to be lubricated, the suction end 123 is further provided with at least one oil storage cavity 125 communicated with the oil dump groove 124, and the oil storage cavity 125 is communicated with the first tooth space 122 through the oil dump groove 124. In the embodiment of the present invention, the lubricant may flow into the oil storage cavity 125, because the oil storage cavity 125 may store the lubricant, when the rotor assembly 10 is started, the lubricant stored in the oil storage cavity 125 may be squeezed into the oil throwing groove 124, and then the lubricant may rapidly enter the first tooth groove 122 through the oil throwing groove 124, so as to lubricate the first rotor 12. During the rotation of the first rotor 12, the lubricant in the oil storage chamber 125 can enter the first tooth slot 122 from the side, and then the lubricant is compressed and discharged with the gas, so that the first rotor 12 is prevented from being lubricated without the lubricant in the initial working stage, and the first rotor 12 is prevented from being worn. The volume of the oil storage cavity 125 is large enough to make itself have enough oil storage capacity to meet the lubricating requirement.

Similarly, according to actual needs, the oil storage chamber 125 may be provided only on one of the two first rotors 12, or the oil storage chamber 125 may be provided on both the two first rotors 12.

In an embodiment of the present invention, the oil storage cavity 125 is formed by recessing the end of the first spiral blade 121 close to the air suction end 123 away from the end of the air suction end 123, that is, the oil storage cavity 125 is opened on the first spiral blade 121.

In an embodiment of the present invention, each of the first helical blades 121 is provided with one oil storage cavity 125, and each of the first tooth grooves 122 is correspondingly provided with one oil throwing groove 124.

In an embodiment of the present invention, the shape of the oil storage cavity 125 is kept substantially the same as the shape of the end of the first helical blade 121 close to the air suction end 123, so that the volume of the oil storage cavity 125 is larger to store more lubricant, thereby satisfying the lubrication requirement of the rotor assembly 10. However, in order to avoid damage to the first helical blade 121 and influence the normal operation of the first rotor 12, a certain distance should be left between the inner wall of the oil storage chamber 125 and the outer wall of the first helical blade 121.

In an embodiment of the present invention, the air suction end 123 further has a baffle (not shown), the baffle is disposed corresponding to the oil storage cavity 125, and is used for blocking the lubricant in the oil storage cavity 125 and preventing the lubricant from flowing out of the oil storage cavity 125, so that the lubricant is stored in the oil storage cavity 125.

The utility model discloses an embodiment, two first rotor 12 the end of breathing in 123 is equallyd divide and is equipped with at least one get rid of oil groove 124 and at least one with get rid of oil groove 124 intercommunication deposit oil chamber 125, deposit oil chamber 125 through get rid of oil groove 124 with first tooth's socket 122 is linked together. By providing the oil storage cavities 125 on both the first rotors 12, when the rotor assembly 10 is started, the two first rotors 12 can be directly lubricated by the lubricant in the oil storage cavities 125, and meanwhile, the two second rotors 22 can be directly lubricated by the lubricant in the oil storage cavities 125 on the corresponding first rotors 12, so that the lubricating pressure is reduced.

The utility model discloses an embodiment, first pivot 11 is inside to be seted up a main oil circuit 111 and at least one with branch oil circuit 112 that main oil circuit 111 communicates, first rotor 12 with be formed with lubricated clearance 126 between the first pivot 11, lubricated clearance 126 with branch oil circuit 112 reaches get rid of oil groove 124 intercommunication. The main oil passage 111 serves to temporarily store lubricant. The lubricant flowing in from one end of the main oil passage 111 flows through the branch oil passage 112, and a part of the lubricant flowing out from the branch oil passage 112 flows into the first tooth groove 122 through the lubricating gap 126 and the oil slinger 124, and the other part flows into the oil storage chamber 125 and is stored in the oil storage chamber 125.

Referring to fig. 6, in an embodiment of the present invention, the first rotor 12 is directly sleeved on the first rotating shaft 11 and can rotate relative to the first rotating shaft 11, and the lubricant flowing out from the branch oil path 112 enters the lubrication gap 126 between the first rotating shaft 11 and the first rotor 12.

Referring to fig. 2 again, in an embodiment of the present invention, the difference between fig. 2 and fig. 6 is that the rotor assembly 10 further includes at least two supporting bearings 127, the supporting bearings 127 are sleeved on the first rotating shaft 11 and bear the first rotor 12, and the supporting bearings 127 and the first rotor 12 can rotate relative to the first rotating shaft 11. A gap 1271 is formed between two adjacent support bearings 127, and the gap 1271 is communicated with the branch oil path 112 and the lubrication gap 126. The lubricant flowing in from one end of the main oil passage 111 flows through the branch oil passage 112, the lubricant flowing out from the branch oil passage 112 flows into the lubrication gap 126 through the gap 1271, a part of the lubricant flowing out from the lubrication gap 126 flows into the first tooth groove 122 through the oil slinger 124, and the other part flows into the oil storage chamber 125 and is stored in the oil storage chamber 125.

The number of the sliding bearings can be set according to the requirement, for example, the number of the sliding bearings can be any value of 1-6. The number of second channels may be any number from 2 to 12.

Referring to fig. 7, the support bearing 127 includes a bearing shell 1272, and a gap is formed between the bearing shell 1272 and the first rotating shaft 11. It should be noted that the bearing shell 1272 is provided with a communication hole 1273, and the communication hole 1273 communicates the inner surface and the outer surface of the bearing shell 1272, so that the lubricant can lubricate the inner surface and the outer surface of the bearing shell 1272. The outer wall of the bearing 1272 is further provided with a through groove 1274 communicating with the communication hole 1273, and the through groove 1274 can accelerate the flow of the lubricant between the first rotor 12 and the first rotating shaft 11, so that the lubricant can more easily flow to the oil slinger 124.

In an embodiment of the present invention, an oil storage groove 128 communicating with the lubrication gap is disposed on an inner wall of the first rotor 12 facing the first rotating shaft 11. The oil reservoir 128 may be provided in plurality, with at least one of the oil reservoirs 128 communicating with at least one of the lubrication gaps 126. The oil sump 128 stores a quantity of lubricant to provide the lubricant needed to support the bearings 127 during start-up of the rotor assembly 10. Specifically, during start-up of the rotor assembly 10, the lubricant in the oil reservoir 128 is squeezed into the lubrication gap 126 to lubricate the support bearing 127.

Referring to fig. 1, 2 and 8, the rotor assembly 10 further includes a first bearing housing 23, a splitter 30 and a rotor housing 40. The first bearing housing 23 is disposed at one end of the second rotating shaft 21, a first bearing cavity 25 is disposed between the first bearing housing 23 and the second rotating shaft 21, and a first bearing 27 disposed on the second rotating shaft 21 is accommodated in the first bearing cavity 25. The first bearing 27 is located on the motor side of the respective compressor.

In an embodiment of the present invention, the flow dividing member 30 includes a main oil inlet 31, a first oil outlet 32 and a second oil outlet 33, two ends of the first oil outlet 32 respectively communicate with the main oil inlet 31 and the main oil path 111, two ends of the second oil outlet 33 respectively communicate with the main oil inlet 31 and the first bearing cavity 25, so that the lubricant from the main oil inlet 31 respectively flows into the first oil outlet 32 and the second oil outlet 33. After being branched by the branch member 30, a part of the lubricant flows into the main oil passage 111 to lubricate the first rotating shaft 11 and the support bearing 127, and another part of the lubricant flows into the first bearing cavity 25 to lubricate the first bearing 27.

In an embodiment of the present invention, the shunting member 30 can be a throttling plug, which not only can shunt the lubricant, but also can control the flow rate of the lubricant.

In an embodiment of the present invention, the rotor housing 40 is used for accommodating the first rotor 12 and the second rotor 22, the rotor housing 40 is provided with a first oil return port 41 communicated with the first bearing cavity 25, the first oil return port 41 is disposed on one side of the rotor housing 40 close to the first bearing 27 and communicated with the second tooth groove 222.

In an embodiment of the present invention, the rotor assembly 10 further includes a first oil return member 60, and the first oil return member 60 is connected to the first bearing 27 and the first oil return port 41. The first oil return member 60 includes a first oil return chamber (not shown), one end of which is communicated with the first bearing chamber 25, and the other end of which is communicated with the first oil return port 41. After the lubricant in the first bearing cavity 25 has lubricated the first bearing 27, the lubricant may enter the rotor housing 40 through the first oil return cavity and the first oil return port 41, and then enter the second tooth groove 222. Since the second oil return port 41 is directly opposite to the second tooth groove 222, when the first rotor 12 and the second rotor 22 rotate, the air pressure of the area where the second tooth groove 222 is located is lower than that of other areas, so that the lubricant in the first bearing cavity 25 can more easily enter the second tooth groove 222 and then be compressed and discharged together with the air.

In an embodiment of the present invention, the rotor assembly 10 further includes a second bearing housing 24, an oil control member 50, and a second oil return port 42. The second bearing housing 24 is disposed at the other end of the second rotating shaft 21, a second bearing cavity 26 is disposed between the second bearing housing 24 and the second rotating shaft 21, and a second bearing 28 disposed on the second rotating shaft 21 is accommodated in the second bearing cavity 26. The second bearing 28 is located on the non-motor side of the respective compressor.

In an embodiment of the present invention, the oil control member 50 includes a third oil outlet 51, two ends of the third oil outlet 51 are respectively communicated with the main oil path 111 and the second bearing cavity 26, and the lubricant from the main oil inlet 31 flows into the third oil outlet 51 from the main oil path 111 and then flows into the second bearing cavity 26.

In an embodiment of the present invention, the second oil return opening 42 is disposed on the rotor housing 40, the second oil return opening 42 is communicated with the second bearing cavity 26, the second oil return opening 42 is disposed on the rotor housing 40 near one side of the second bearing 28 and is communicated with the second tooth groove 222.

In an embodiment of the present invention, the rotor assembly 10 further includes a second oil return member 70, and the second oil return member 70 is connected to the second bearing 28 and the second oil return opening 42. The second oil return member 70 includes a second oil return cavity (not shown), one end of which is communicated with the second bearing cavity 26, and the other end of which is communicated with the second oil return port 42. After the lubricant in the second bearing cavity 26 has lubricated the second bearing 28, the lubricant can enter the rotor housing 40 through the first oil return cavity and the second oil return opening 42, and then enter the second tooth groove 222. Similarly, since the second tooth groove 222 is opposite to the second oil return opening 42, when the first rotor 12 and the second rotor 22 rotate, the air pressure in the area where the second tooth groove 222 is located is lower than that in other areas, so that the lubricant in the second bearing cavity 26 can more easily enter the second tooth groove 222 and then be compressed and discharged together with the air.

In an alternative embodiment of the present invention, the lubricant may be a refrigeration oil, which not only lubricates the rotor assembly 10, but also dissipates and refrigerates the heat.

It can be understood that, in the embodiment of the present invention, the oil path can complete the oil supply of the bearing of the first rotor 12 and the oil supply of the bearing lubrication of the left and right sides of the second rotor 22 through a main oil inlet 31. The lubricant after completing the bearing lubrication eventually enters the rotor tooth space volume to lubricate the meshing of the first rotor 12 and the second rotor 22. The flow path of the lubricant may include three paths, and the first oil path includes: the main oil inlet 31, the main oil path 111 in the first rotating shaft 11, the branch oil path 112 in the first rotating shaft 11, the lubrication gap 126 between the first rotating shaft 11 and the support bearing 127, and the air inlet end surface and the rotor tooth space volume of the first rotor 12. The second oil path includes: the main oil inlet 31, the first bearing cavity 25, the first oil return port 41 and the rotor tooth space volume. The third oil path includes: the main oil inlet 31, the main oil path 111 in the first rotating shaft 11, the second bearing cavity 26, the second oil return port 42 and the volume between rotor teeth. Lubrication of the first rotor 12, the second rotor 22 and all bearings is achieved through a main oil inlet 31.

The rotation directions of the two first rotors 12 are opposite, and the rotation directions of the two second rotors 22 are opposite, that is, the rotation directions of the first helical blades 121 of the two first rotors 12 are opposite, and the rotation directions of the second helical blades 221 of the two second rotors 22 are opposite. One pair of the first rotor 12 and the second rotor 22 correspondingly arranged generates an axial force in a first direction in the compression process, the other pair of the first rotor 12 and the second rotor 22 correspondingly arranged generates an axial force in a second direction in the compression process, the first direction and the second direction are opposite, and the axial force in the first direction and the axial force in the second direction can at least partially cancel each other, so that the problem of overlarge axial force can be solved.

It should be noted that, one pair of the first rotor 12 and the second rotor 22, which are correspondingly arranged, generates an axial force in a first direction during the compression process, and the other pair of the first rotor 12 and the second rotor 22, which are correspondingly arranged, generates an axial force in a second direction during the compression process, where the first direction and the second direction are opposite, and if the axial force in the first direction and the axial force in the second direction are completely cancelled, the bearing for bearing the first rotating shaft and the second rotating shaft may only include a radial bearing, and no thrust bearing is provided. If the axial force remaining after the axial force in the first direction and the axial force in the second direction are partially offset is small, the impact of the collision of the first rotor 12 and the second rotor 22 with the rotor housing 40 is also small, and the bearing for supporting the first rotating shaft and the second rotating shaft may only include a radial bearing without providing a thrust bearing.

It can be understood that, because of the manufacturing process problem, the first rotor 12 and the second rotor 22 both have a certain tolerance range, which results in that the teeth of the two portions of the first rotor 12 are not completely symmetrical, and the teeth of the two portions of the second rotor 22 are not completely symmetrical, and thus the direction of the axial force after the axial force in the first direction and the axial force in the second direction are partially offset is uncertain, and thrust bearings in two directions need to be provided. In the present embodiment, the structure of the first rotor 12 and/or the second rotor 22 may be changed such that the axial force in one direction is constantly greater than the axial force in the other direction within the tolerance range of the first rotor 12 and the second rotor 22, so that the resultant of the axial forces generated after the first rotor and the second rotor are meshed for rotation is in a fixed direction, and therefore, only one direction thrust bearing may be provided, and one direction thrust bearing may be omitted. For example, by changing the configuration of the first rotor 12 so that the axial force in the first direction is greater than the axial force in the second direction. Specifically, at least one of the length, the diameter, the tooth density, the tooth thickness and the profile of the end face of each first rotor 12 may be changed, so that the axial force in the first direction generated during the compression of one pair of the first and second rotors that are correspondingly arranged is greater than the axial force in the second direction generated during the compression of the other pair of the first and second rotors that are correspondingly arranged. Thereby omitting the thrust bearings on the first and second shafts that correspond to axial forces in the second direction.

The present invention also provides a compressor comprising the rotor assembly 10 as defined above in combination with one or more of the above embodiments. The compressor further comprises a motor, the motor drives the second rotating shaft 21, the second rotating shaft 21 drives the second rotor 22, and the second rotor 22 drives the first rotor 12.

The utility model discloses still provide an air conditioner, include as above one or more embodiments combine together and define the compressor. The air conditioner further comprises other air conditioner components, which are not described herein in detail.

The utility model provides a rotor subassembly, compressor and air conditioner, the rotor subassembly includes first pivot and the first rotor that rotationally sets up on first pivot, and first rotor includes a plurality of first helical blade, forms first tooth's socket between two adjacent first helical blade; be equipped with at least one through the end of breathing in at first rotor and get rid of the oil groove, get rid of the oil groove and be used for getting into first tooth's socket with emollient through getting rid of the oil groove to can ensure that emollient can fully lubricate and sealed first tooth's socket, make the compressor operation more smooth and easy.

The above detailed descriptions of the rotor assembly, the compressor and the air conditioner provided by the embodiments of the present invention are provided, and the detailed examples are applied herein to explain the principle and the implementation of the present invention, and the descriptions of the above embodiments are only used to help understand 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 some changes in the specific implementation and application scope, and to sum up, the content of the present specification should not be understood as a limitation to the present invention.

Claims

1. A rotor assembly, characterized in that the rotor assembly comprises:

a first rotating shaft; and

the first rotor is rotatably arranged on the first rotating shaft;

2. The rotor assembly of claim 1, further comprising:

a second rotating shaft; and

3. The rotor assembly of claim 2, wherein the rotor assembly comprises two of the first rotors and two of the second rotors;

4. A rotor assembly as claimed in claim 3 wherein said suction ends of said two first rotors are inter-engaged, at least one of said suction ends of said two first rotors being provided with at least one said oil slinger.

5. A rotor assembly according to any one of claims 1 to 4, wherein the oil slinger opens at the junction of two adjacent first helical blades.

6. A rotor assembly according to any one of claims 1 to 4, wherein the oil slinger opens onto the first helical blade.

7. The rotor assembly as claimed in claim 1, wherein the air suction end further comprises at least one oil storage chamber communicating with the oil slinging groove, and the oil storage chamber communicates with the first tooth groove through the oil slinging groove.

8. The rotor assembly of claim 7 wherein the oil storage cavity is recessed from an end of the first helical blade adjacent to the air suction end to an end remote from the air suction end.

9. The rotor assembly as claimed in claim 3, wherein a main oil passage and at least one branch oil passage communicating with the main oil passage are formed in the first rotating shaft, and a lubrication gap is formed between the first rotor and the first rotating shaft and is communicated with the branch oil passage and the oil slinging groove.

10. The rotor assembly of claim 9, further comprising a plurality of support bearings, wherein the support bearings are sleeved on the first rotating shaft and carry the first rotor, and the support bearings and the first rotor can rotate relative to the first rotating shaft;

11. The rotor assembly of claim 9 wherein the inner wall of the first rotor facing the first shaft defines an oil reservoir in communication with the lubrication gap.

12. The rotor assembly of any one of claims 9-11, further comprising:

13. The rotor assembly of claim 12, further comprising:

14. A compressor comprising a rotor assembly as claimed in any one of claims 1 to 13.

15. An air conditioner characterized by comprising the compressor of claim 14.