Rotor assemblies, compressors and air conditioners

Abstract

The embodiment of the present invention provides a rotor assembly, a compressor and an air conditioner, wherein the rotor assembly comprises: a first rotor, comprising a first part and a second part with opposite thread rotation directions, wherein the first part comprises a plurality of first teeth, wherein two adjacent first teeth form a first tooth groove, and the second part comprises a plurality of second teeth, wherein two adjacent second teeth form a second tooth groove, and the first rotor is provided with a first channel opened in the first part and / or the second part, wherein the first channel is connected to the first tooth groove and / or the second tooth groove; and a first shaft body, carrying the first rotor, wherein a gap is provided between the first shaft body and the first rotor, wherein the gap is connected to the first channel so that the lubricant in the gap enters the first tooth groove and / or the second tooth groove through the first channel. The lubricant can conveniently enter the first tooth groove or the second tooth groove through the first channel and be discharged together with the air, and there is no need to guide the lubricant in the gap through other structures, thereby simplifying the discharge structure of the lubricant in the gap.

Description

Technical Field

[0001] The present invention relates to the technical field of compressors, and in particular to a rotor assembly, a compressor and an air conditioner. Background Art

[0002] The compressor is generally provided with a pair of parallel helical rotors, which are placed in the space volume of the compressor shell. During the rotation of the pair of helical rotors, the space volume of the compressor shell will increase and decrease periodically, so that the space volume is periodically connected and closed with the air inlet and the exhaust port, and the process of suction, compression and exhaust can be completed. An oil circuit is provided in the compressor to supply oil from the oil supply port of the compressor to the helical rotor. However, multiple oil circuits need to be provided for multiple rotors in a multi-rotor compressor, and many additional structures need to be provided. Summary of the invention

[0003] The embodiments of the present invention provide a rotor assembly, a compressor and an air conditioner, which can lubricate multiple rotors through one oil circuit and simplify the structure of the rotor assembly.

[0004] An embodiment of the present invention provides a rotor assembly, comprising:

[0005] A first rotor comprises a first part and a second part with opposite thread rotation directions, wherein the first part comprises a plurality of first teeth, two adjacent first teeth form a first tooth groove, and the second part comprises a plurality of second teeth, two adjacent second teeth form a second tooth groove, and the first rotor is provided with a first channel opened in the first part and / or the second part, and the first channel is connected with the first tooth groove and / or the second tooth groove; and

[0006] A first shaft body carries the first rotor, a gap is defined between the first shaft body and the first rotor, and the gap is connected to the first channel so that lubricant in the gap enters the first tooth groove and / or the second tooth groove through the first channel.

[0007] In an optional embodiment of the present invention, the first part also includes a first sleeve joint portion arranged between the first tooth portion and the first shaft body, the second part also includes a second sleeve joint portion arranged between the second tooth portion and the first shaft body, and the first channel is arranged in the first sleeve joint portion and / or the second sleeve joint portion.

[0008] In an optional embodiment of the present invention, the first sleeve connection portion includes a first side edge close to the second sleeve connection portion, and the first channel includes a first groove arranged on the first side edge, and the first groove connects the gap and the first tooth groove.

[0009] In an optional implementation manner of the present invention, one end of the first groove communicating with the first tooth groove is arranged between two of the first tooth portions.

[0010] In an optional implementation manner of the present invention, the first side is further provided with a first oil storage cavity connected to the first channel.

[0011] In an optional implementation manner of the present invention, the first oil storage chamber is provided with a first drainage groove communicating with the first channel on the first side.

[0012] In an optional embodiment of the present invention, the second sleeve connection portion includes a second side edge close to the first sleeve connection portion, the first channel includes a second groove arranged on the second side edge, and the second groove connects the gap and the second tooth groove.

[0013] In an optional implementation manner of the present invention, one end of the second groove communicating with the second tooth groove is arranged between two second tooth portions.

[0014] In an optional embodiment of the present invention, the second side is further provided with a second oil storage chamber connected with the first channel, and the second oil storage chamber is provided with a second drainage groove connected with the first channel on the second side.

[0015] In an optional embodiment of the present invention, the first channel includes a first through hole penetrating the first sleeve portion and a second through hole penetrating the second sleeve portion, the first through hole connects the gap and the first tooth groove, and the second through hole connects the gap and the second tooth groove.

[0016] In an optional embodiment of the present invention, a second channel and at least one third channel are provided in the first shaft body, the second channel is arranged along the axial direction of the first shaft body, and the third channel connects the second channel with the gap so that the lubricant in the second channel enters the gap through the third channel.

[0017] In an optional embodiment of the present invention, the rotor assembly further includes:

[0018] A first bearing is disposed between the first rotor and the first shaft, and the first rotor rotates around the first shaft through the first bearing.

[0019] In an optional embodiment of the present invention, there are multiple third channels, and the outer surface of the first shaft is provided with a first opening connected to each of the third channels, and the multiple first openings are spaced apart on the outer surface of the first shaft.

[0020] In an optional implementation manner of the present invention, there are multiple first bearings, and each first opening is arranged between two adjacent first bearings.

[0021] In an optional implementation manner of the present invention, the outer surface of the first shaft body has a first surface and a second surface, the radial force of the first surface is smaller than the radial force of the second surface, and the first opening is arranged on the first surface.

[0022] In an optional embodiment of the present invention, the outer surface of the first shaft body has a first surface and a second surface. When the first rotor rotates around the first shaft body, the radial force of the first rotor borne by the first surface is smaller than the radial force of the first rotor borne by the second surface. The outer surface of the first shaft body is provided with a first opening connected to the third channel, and the first opening is arranged on the first surface.

[0023] In an optional embodiment of the present invention, the outer surface of the first shaft body includes a first surface and a second surface radially adjacent to the first surface, the radial distance from the second surface to the axis of the first shaft body is greater than the radial distance from the first surface to the axis of the first shaft body, and the outer surface of the first shaft body is provided with a first opening connected to the third channel, and the first opening is arranged on the first surface.

[0024] In an optional implementation manner of the present invention, an oil storage tank is provided on the inner side of the first rotor and is arranged around the first shaft body, and the oil storage tank is communicated with the gap.

[0025] In an optional embodiment of the present invention, the rotor assembly further includes:

[0026] a second rotor, the second rotor comprising a third portion and a fourth portion having opposite thread directions, the third portion being meshedly connected to the first portion, and the fourth portion being meshedly connected to the second portion; and

[0027] The second shaft carries the second rotor.

[0028] In an optional implementation manner of the present invention, the third part is integrally formed with the second shaft body, and the fourth part is sleeved on the second shaft body.

[0029] In an optional embodiment of the present invention, the rotor assembly further includes:

[0030] A second bearing, carrying the second shaft body;

[0031] a first bearing housing accommodating the second bearing; and

[0032] The first guide member is communicated with the first bearing shell to transmit the lubricant into the first bearing shell.

[0033] In an optional embodiment of the present invention, the rotor assembly further includes:

[0034] A rotor shell, accommodating the first rotor and the second rotor, wherein a first oil inlet is provided on a side of the rotor shell close to the first bearing shell;

[0035] The second guide member has one end connected to the first bearing shell and the other end connected to the first oil inlet, so as to transfer the lubricant in the first bearing shell to the rotor shell through the first oil inlet.

[0036] In an optional embodiment of the present invention, the first rotor and the second rotor have a plurality of inter-tooth regions on one side close to the first bearing shell, and when the first rotor and the second rotor rotate, the air pressure in the inter-tooth region facing the first oil inlet is lower than the air pressure in other inter-tooth regions.

[0037] In an optional embodiment of the present invention, the second shaft body includes a first end portion engaged with the motor and a second end portion disposed opposite to the first end portion, and the second end portion is disposed in the second bearing;

[0038] The rotor assembly further comprises:

[0039] A third bearing, sleeved on the first end portion;

[0040] a second bearing housing, accommodating the third bearing;

[0041] a third flow guide member, connected to the second bearing shell;

[0042] A second channel is disposed in the first shaft body, and the second channel is communicated with the third flow guide member so as to transmit the lubricant in the second channel to the second bearing shell through the third flow guide member.

[0043] In an optional embodiment of the present invention, a second oil inlet is provided on a side of the rotor housing close to the second bearing housing;

[0044] The rotor assembly also includes a fourth guide member, one end of which is connected to the second bearing shell, and the other end of which is connected to the second oil inlet, so as to transfer the lubricant in the second bearing shell to the rotor shell through the second oil inlet.

[0045] In an optional embodiment of the present invention, the rotor assembly further includes:

[0046] The flow divider includes an oil inlet port, a first oil outlet port and a second oil outlet port. The first oil outlet port is connected to the first guide member to transfer the lubricant entering from the oil inlet port to the first bearing shell. The second oil outlet port is connected to the gap through a second channel in the first shaft body to transfer the lubricant entering from the oil inlet port to the gap.

[0047] In an optional embodiment of the present invention, the rotor assembly further includes a first sliding bearing for carrying the first part and a second sliding bearing for carrying the second part, and a gap is provided between the first sliding bearing and the second sliding bearing, and the gap is connected to the first channel.

[0048] In an optional embodiment of the present invention, the rotor assembly further comprises a first sliding bearing carrying the first part and a second sliding bearing carrying the second part, the first sliding bearing comprises a first bearing bush, the second sliding bearing comprises a second bearing bush, the first bearing bush and the second bearing bush are adjacent to each other, a first lubrication gap is provided between the first bearing bush and the first shaft body, and a second lubrication gap is provided between the second bearing bush and the first shaft body;

[0049] The first bearing shell includes a third groove near the side of the second bearing shell, and the third groove connects the first channel and the first lubrication gap. The second bearing shell includes a fourth groove near the side of the first bearing shell, and the fourth groove connects the first channel and the second lubrication gap.

[0050] An embodiment of the present invention further provides a rotor assembly, comprising:

[0051] A second rotor including a third portion and a fourth portion having threads in opposite directions;

[0052] A second shaft body, carrying the second rotor;

[0053] A second bearing, sleeved on the second shaft;

[0054] a rotor housing for accommodating the second rotor;

[0055] a first bearing shell, accommodating the second bearing, and a first oil inlet is provided on a side of the rotor shell close to the first bearing shell; and

[0056] The second guide member has one end connected to the first bearing shell and the other end connected to the first oil inlet, so as to transfer the lubricant in the first bearing shell to the rotor shell through the first oil inlet.

[0057] In an optional embodiment of the present invention, the first rotor and the second rotor have a plurality of first inter-tooth regions on one side close to the first bearing shell, and when the first rotor and the second rotor rotate, the air pressure in the first inter-tooth region facing the first oil inlet is lower than the air pressure in other first inter-tooth regions.

[0058] In an optional embodiment of the present invention, the second shaft body includes a first end portion clamped with the motor, and a second end portion arranged opposite to the first end portion, the second end portion is arranged in the second bearing, and a second oil inlet is arranged on a side of the rotor shell close to the second bearing shell;

[0059] The rotor assembly further comprises:

[0060] A third bearing, sleeved on the first end portion;

[0061] a second bearing housing accommodating the third bearing; and

[0062] A fourth guide member, one end of which is connected to the second bearing shell, and the other end of which is connected to the second oil inlet, so as to transfer the lubricant in the second bearing shell to the rotor shell through the second oil inlet.

[0063] In an optional embodiment of the present invention, the first rotor and the second rotor have a plurality of second inter-tooth regions on one side close to the second bearing shell, and when the first rotor and the second rotor rotate, the air pressure in the second inter-tooth region facing the second oil inlet is lower than the air pressure in other second inter-tooth regions.

[0064] In an optional embodiment of the present invention, the rotor assembly also includes a first shaft and a first rotor, the first rotor is sleeved on the first shaft, the first rotor includes a first part and a second part with opposite thread rotation directions, the first part is meshedly connected to the third part, and the second part is meshedly connected to the fourth part.

[0065] An embodiment of the present invention provides a compressor, comprising:

[0066] A rotor assembly, wherein the rotor assembly is a rotor assembly as described in any one of the above items.

[0067] An embodiment of the present invention provides an air conditioner, comprising:

[0068] A compressor, wherein the compressor has a rotor assembly as described above.

[0069] Based on the technical solution provided by the present invention, the rotor assembly includes a first shaft body and a first rotor rotating around the first shaft body, and a gap is provided between the first rotor and the first shaft body to accommodate lubricant, and the first rotor and the first shaft body can rotate better through the lubricant. The first rotor includes a first part and a second part with opposite thread rotation directions, a plurality of first teeth of the first part form a first tooth groove, and the second part includes a plurality of second teeth to form a second tooth groove. The first part is provided with a first channel connecting the gap and the first tooth groove, and / or the second part is provided with a first channel connecting the gap and the second tooth groove, so that the lubricant in the gap enters the first tooth groove and / or the second tooth groove through the first channel, and then is compressed and discharged together with the gas. The lubricant can easily enter the first tooth groove or the second tooth groove through the first channel and be discharged together with the air, and there is no need to guide the lubricant in the gap through other structures, which simplifies the discharge structure of the lubricant in the gap.

[0070] In the embodiment of the present invention, the oil circuit for lubricating the bearings supporting the second shaft body can be connected to the oil circuit for lubricating the bearings supporting the first shaft body to form a complete oil circuit. A complete oil circuit can lubricate all bearings and lubricate the meshing area of ​​the first rotor and the second rotor. In addition, the first oil storage chamber of the first part and the second oil storage chamber of the second part can store part of the lubricant, and when the rotor assembly is started, the lubricant in the first oil storage chamber and the second oil storage chamber can lubricate the rotor meshing area. The oil storage tank on the inner side of the first rotor can store part of the lubricant, and when the rotor assembly is started, the lubricant in the oil storage tank can lubricate the bearings supporting the first shaft body. BRIEF DESCRIPTION OF THE DRAWINGS

[0071] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention, and those skilled in the art can obtain other drawings based on these drawings without creative work.

[0072] In order to more completely understand the present invention and its beneficial effects, the following description will be given in conjunction with the accompanying drawings, wherein the same reference numerals in the following description represent the same parts.

[0073] Figure 1 A schematic structural diagram of a rotor assembly provided by an embodiment of the present invention.

[0074] Figure 2 for Figure 1 A schematic cross-sectional view of the first rotor and the first shaft in the rotor assembly is shown.

[0075] Figure 3 for Figure 1 A schematic diagram of the end surface of the first part close to the second part of the rotor assembly is shown.

[0076] Figure 4 for Figure 1 A schematic diagram of the end surface of the second part of the rotor assembly close to the first part is shown.

[0077] Figure 5 for Figure 1 Another cross-sectional schematic diagram of the first rotor and the first shaft in the rotor assembly is shown.

[0078] Figure 6 for Figure 1 A schematic structural diagram of the first shaft body in the rotor assembly is shown.

[0079] Figure 7 for Figure 1 A schematic cross-sectional view of the first rotor and the second rotor in the rotor assembly is shown.

[0080] Figure 8 for Figure 1 A schematic cross-sectional view of the first shaft body, the first rotor, the second shaft body and the second rotor in the rotor assembly is shown.

[0081] Fig. 9 A schematic structural diagram of the first part, the third part and the rotor shell provided in an embodiment of the present invention.

[0082] Fig.10 It is a schematic diagram of the structure of the second part, the fourth part and the rotor shell in an embodiment of the present invention.

[0083] Fig.11 for Figure 1 A schematic diagram of the matching structure of the first rotor, the second shaft, the first sliding bearing and the second sliding bearing in the rotor assembly is shown.

[0084] Fig.12 for Fig.11 A schematic structural diagram of the first sliding bearing and the first bearing shell and the second bearing shell of the second sliding bearing is shown.

[0085] Fig.13 for Fig.12 A schematic structural diagram of the first bearing is shown.

[0086] Fig.14 for Figure 1 Schematic diagram of the oil circuit formed by the rotor assembly shown.

[0087] Fig.15 A schematic diagram of the structure of a compressor provided in an embodiment of the present invention.

[0088] The reference numerals represent:

[0089] 10. first shaft; 12. second channel; 14. third channel; 142. first opening; 16. gap; 182. first surface; 184. second surface;

[0090] 20. first rotor; 22. first part; 221. first tooth portion; 222. first tooth groove; 224. first sleeve portion; 225. first side edge; 226. first oil storage chamber; 227. first drainage groove; 24. second part; 241. second tooth portion; 242. second tooth groove; 244. second sleeve portion; 245. second side edge; 246. second oil storage chamber; 247. second drainage groove; 26. first passage; 261. first groove; 262. second groove; 263. first through hole; 264. second through hole; 28. oil storage tank;

[0091] 30. second shaft; 32. first end; 34. second end;

[0092] 40, second rotor; 42, third portion; 421, third tooth portion; 44, fourth portion; 442, fourth tooth portion; 462, first inter-tooth region; 464, second inter-tooth region;

[0093] 52, first bearing; 53, first bearing shell; 54, second bearing; 55, second bearing shell; 56, third bearing; 57, first sliding bearing; 572, first bearing shell; 574, third groove; 576, connecting hole; 578, through groove; 58, second sliding bearing; 582, second bearing shell; 584, fourth groove; 59, gap;

[0094] 60, rotor housing; 62, first oil inlet; 64, second oil inlet;

[0095] 70, oil circuit main inlet; 71, flow divider; 72, first flow guide; 74, second flow guide; 76, third flow guide; 78, fourth flow guide;

[0096] 200. Compressor; 220. Motor. DETAILED DESCRIPTION

[0097] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. All other embodiments obtained by those skilled in the art without creative work based on the embodiments in the present invention belong to the protection scope of the present invention.

[0098] References to "embodiments" or "implementations" herein mean that a particular feature, structure, or characteristic described in conjunction with the embodiments or implementations may be included in at least one embodiment of the present invention. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive of other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0099] The present invention provides a rotor assembly, please refer to Figure 1 and Figure 2 , Figure 1 A schematic diagram of the structure of a rotor assembly provided by an embodiment of the present invention, Figure 2 for Figure 1 A cross-sectional schematic diagram of the first rotor and the first shaft body in the rotor assembly is shown. The rotor assembly includes a first shaft body 10 and a first rotor 20. The first shaft body 10 carries the first rotor 20 so that the first rotor 20 can rotate around the first shaft body 10. There is a gap 16 between the first shaft body 10 and the first rotor 20, and a lubricant can be contained in the gap 16. The first rotor 20 and the first shaft body 10 can rotate better through the lubricant.

[0100] The first rotor 20 includes a first portion 22 and a second portion 24 with opposite thread directions. The first portion 22 includes a plurality of first teeth 221 , and two adjacent first teeth 221 form a first tooth groove 222 . The second portion 24 includes a plurality of second teeth 241 , and two adjacent second teeth 241 form a second tooth groove 242 .

[0101] The first rotor 20 is provided with a first channel opened in the first part 22 and / or the second part 24, and the first channel is connected to the first tooth groove and / or the second tooth groove. Specifically, the first part 22 is provided with a first channel 26 connected to the first tooth groove 222, and / or the second part 24 is provided with a first channel 26 connected to the second tooth groove 242; the first channel 26 is connected to the gap 16, so that the lubricant in the gap 16 enters the first tooth groove 222 and / or the second tooth groove 242 through the first channel 26, and then the lubricant is compressed and discharged together with the gas. The lubricant can easily enter the first tooth groove 222 and / or the second tooth groove 242 through the first channel 26 and be discharged together with the air, and there is no need to guide the lubricant in the gap 16 through other structures, which simplifies the discharge structure of the lubricant in the gap 16.

[0102] The rotor assembly further includes a second shaft body 30 and a second rotor 40, and the second rotor 40 can rotate around the axis of the second shaft body 30. The second rotor 40 includes a third portion 42 and a fourth portion 44 with opposite thread directions, the third portion 42 is meshedly connected with the first portion 22, and the fourth portion 44 is meshedly connected with the second portion 24. The second shaft body 30 can drive the second rotor 40 to rotate, the third portion 42 of the second rotor 40 can drive the first portion 22 of the first rotor 20 to rotate, and the fourth portion 44 of the second rotor 40 can drive the second portion 24 of the first rotor 20 to rotate. Among them, the third portion 42 is meshedly connected with the first portion 22 to achieve gas compression, and the fourth portion 44 is meshedly connected with the second portion 24 to achieve gas compression. The compression capacity of the first portion 22 and the third portion 42 is equivalent to the compression capacity of a group of ordinary rotors. Therefore, the compression capacity of the first rotor 20 and the second rotor 40 in this embodiment is equivalent to the compression capacity of the other two groups of ordinary rotors, and the volume is much smaller than the volume of the two groups of ordinary rotors.

[0103] The first part 22 and the second part 24 have opposite thread directions, that is, the first tooth portion 221 of the first part 22 and the second tooth portion 241 of the second part 24 have opposite thread directions, and the third tooth portion of the third part 42 and the fourth tooth portion of the fourth part 44 have opposite thread directions. During the compression of the first part 22 and the third part 42, an axial force in a first direction is generated, and during the compression of the second part 24 and the fourth part 44, an axial force in a second direction is generated. 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 offset each other, thereby improving the problem of excessive axial force.

[0104] The area between the first part 22 and the second part 24 is the air intake area, the end face of the first part 22 close to the second part 24 and the end face of the second part 24 close to the first part 22 are the air intake end faces, and the end face of the first part 22 away from the second part 24 and the end face of the second part 24 away from the first part 22 are the air outlet end faces.

[0105] The first part 22 further includes a first sleeve portion 224 disposed between the first tooth portion 221 and the first shaft body 10, the first sleeve portion 224 carries the first tooth portion 221, and the first sleeve portion 224 forms the bottom of the first tooth groove 222. The second part 24 further includes a second sleeve portion 244 disposed between the second tooth portion 241 and the first shaft body 10, the second sleeve portion 244 can carry the second tooth portion 241, and the second sleeve portion 244 forms the bottom of the second tooth groove 242. The first channel 26 can be disposed in the first sleeve portion 224 and / or the second sleeve portion 244.

[0106] Please combine Figure 3 , Figure 3 for Figure 1Specifically, the first sleeve portion 224 includes a first side edge 225 close to the second sleeve portion 244 , and the first channel 26 includes a first groove 261 disposed on the first side edge 225 , and the first groove 261 communicates with the gap 16 and the first tooth groove 222 .

[0107] The notch of the first groove 261 is close to the second sleeve portion 244. One end of the first groove 261 is connected to the first tooth groove 222 and the other end is connected to the gap 16. The lubricant in the gap 16 enters the first tooth groove 222 from the first groove 261 due to the centrifugal force generated when the first rotor 20 rotates. The first groove 261 is arranged on the first side edge 225 of the first part 22, that is, arranged on the air inlet end face of the first part 22. When the lubricant enters the first groove 261 from the gap 16, because the air inlet end face of the first part 22 and the air inlet end face of the second part 24 are adjacent, the lubricant can not only enter the first tooth groove 222 through the first groove 261, but also enter the second tooth groove 242, thereby lubricating the first part 22 and the third part 42 that are meshed and connected, and lubricating the second part 24 and the fourth part 44 that are meshed and connected.

[0108] One end of the first groove 261 communicating with the first tooth groove 222 is disposed between the two first tooth portions 221. The first groove 261 may be disposed only on the first sleeve portion 224, and the first groove 261 does not extend to the first tooth portion 221, so that the path of the first groove 261 is the shortest, so that the lubricant in the gap 16 can quickly enter the first tooth groove 222 through the first groove 261.

[0109] It can be understood that the end of the first groove 261 connected to the first tooth groove 222 can also be set on the end face of the first tooth portion 221 close to the second part 24, and the first groove 261 extends from the first sleeve portion 224 to the first tooth portion 221. The length of the first groove 261 can be adjusted as needed, such as adjusting the length of the first groove 261 according to the position where the first groove 261 is connected to the first tooth groove 222.

[0110] Please combine Figure 4 , Figure 4 for Figure 1 The second part of the rotor assembly is shown as a schematic diagram of the end surface of the second part close to the first part. The second sleeve portion 244 includes a second side 245 close to the first sleeve portion 224, and the first channel 26 may include a second groove 262 disposed on the second side 245, and the second groove 262 communicates with the gap 16 and the second tooth groove 242.

[0111] The notch of the second groove 262 is close to the first sleeve portion 224. One end of the second groove 262 is connected to the second tooth groove 242 and the other end is connected to the gap 16. The lubricant in the gap 16 enters the second tooth groove 242 from the second groove 262 due to the centrifugal force generated when the first rotor 20 rotates. The second groove 262 is arranged on the second side 245 of the second part 24, that is, arranged on the air inlet end face of the second part 24. When the lubricant enters the second groove 262 from the gap 16, because the air inlet end face of the second part 24 is adjacent to the air inlet end face of the first part 22, the lubricant can not only enter the second tooth groove 242 through the second groove 262, but also enter the first tooth groove 222, thereby lubricating the meshing connection between the second part 24 and the fourth part 44, and lubricating the meshing connection between the first part 22 and the third part 42.

[0112] One end of the second groove 262 communicating with the second tooth groove 242 is disposed between the two second tooth portions 241. The second groove 262 may be disposed only on the second sleeve portion 244, and the second groove 262 does not extend to the second tooth portion 241, so that the path of the second groove 262 is the shortest, so that the lubricant in the gap 16 can quickly enter the second tooth groove 242 through the second groove 262.

[0113] It can be understood that one end of the second groove 262 connected to the second tooth groove 242 can also be set on the end face of the second tooth portion 241 close to the first part 22, and the second groove 262 extends from the second sleeve portion 244 to the second tooth portion 241. The length of the second groove 262 can be adjusted as needed, such as adjusting the length of the second groove 262 according to the position where the second groove 262 is connected to the second tooth portion 241 and the second tooth groove 242.

[0114] It should be noted that the first rotor 20 may, as needed, provide the first groove 261 only on the first side surface of the first part 22, or provide the second groove 262 only on the second side surface of the second part 24, or provide the first groove 261 on the first side surface of the first part 22 and the second groove 262 on the second side surface of the second part 24.

[0115] The first side 225 may also be provided with a first oil storage chamber 226 connected to the first channel 26, and the first oil storage chamber 226 may store part of the lubricant. When the rotor assembly is started, the lubricant stored in the first oil storage chamber 226 may lubricate the rotor assembly. In addition, the first oil storage chamber 226 is provided with a first drainage groove 227 connected to the first channel 26 on the first side 225. In the process of the lubricant entering the first tooth groove 222 through the first channel 26, the lubricant may also enter the first oil storage chamber 226 through the first drainage groove 227, and the first oil storage chamber 226 may store the lubricant. When the rotor assembly is started, the lubricant stored in the first oil storage chamber 226 may enter the first channel 26 through the first drainage groove 227, and then quickly enter the first tooth groove 222 and the second tooth groove 242 through the first channel 26 to lubricate the first part 22, the second part 24, the third part 42 and the fourth part 44.

[0116] It should be noted that the first oil storage chamber 226 can be arranged in the first tooth portion 221. For example, a receiving chamber is arranged on the side of the first tooth portion 221 close to the second portion 24, and the receiving chamber is connected to the first channel 26 through the first drainage groove 227. Both the first channel 26 and the first drainage groove 227 can be grooves with notches close to the second portion 24.

[0117] The second side 245 may also be provided with a second oil storage chamber 246 in communication with the first channel 26, and the second oil storage chamber 246 may be provided with a second drainage groove 247 in communication with the first channel 26 on the second side 245. When the lubricant enters the second tooth groove 242 through the first channel 26 of the second side 245, the lubricant may also enter the second oil storage chamber 246 through the second drainage groove 247, and the second oil storage chamber 246 may store the lubricant. When the rotor assembly is started, the lubricant stored in the second oil storage chamber 246 may enter the first channel 26 through the second drainage groove 247, and then quickly enter the second tooth groove 242 and the first tooth groove 222 through the first channel 26 to lubricate the first part 22, the second part 24, the third part 42 and the fourth part 44.

[0118] It should be noted that the second oil storage chamber 246 can be arranged in the second tooth portion 241. For example, a receiving chamber is arranged on the side of the second tooth portion 241 close to the first portion 22, and the receiving chamber is connected to the first channel 26 through the second drainage groove 247. Both the first channel 26 and the second drainage groove 247 can be grooves with notches close to the first portion 22.

[0119] It should be noted that the first rotor 20 may be provided with the first oil storage chamber 226 only in the first part 22, the second oil storage chamber 246 only in the second part 24, or the first oil storage chamber 226 may be provided in the first part 22 and the second oil storage chamber 246 may be provided in the second part 24 as needed.

[0120] See also Figure 5 , Figure 5 for Figure 1 Another cross-sectional schematic diagram of the first rotor and the first shaft in the rotor assembly shown. The first channel 26 may also include a first through hole 263 penetrating the first sleeve portion 224 and a second through hole 264 penetrating the second sleeve portion 244, the first through hole 263 connecting the gap 16 and the first tooth groove 222, and the second through hole 264 connecting the gap 16 and the second tooth groove 242. The first sleeve portion 224 may have a first through hole 263 in a portion close to the air inlet end face to increase the unit volume of the lubricant in the gap 16 entering the first tooth groove 222 and accelerate the overall flow of the lubricant. The second sleeve portion 244 may have a second through hole 264 in a portion close to the air inlet end face to increase the unit volume of the lubricant in the gap 16 entering the second tooth groove 242 and accelerate the overall flow of the lubricant.

[0121] It can be understood that in some other embodiments, only the first through hole 263 or the second through hole 264 may be provided.

[0122] When the first part 22 and the third part 42 are rotating and engaging, the first part 22 and the second part 24 form a plurality of inter-tooth areas connected to the air inlet and having equal or similar air pressures. The first through hole 263 connects the gap 16 and the inter-tooth area, that is, the first through hole 263 is located at the position where the first sleeve portion 224 is opened to connect the gap 16 and the inter-tooth area, so that the lubricant in the gap 16 can lubricate the entire first part 22 through the first through hole 263.

[0123] When the second part 24 and the fourth part 44 are rotating and engaging, the second part 24 and the fourth part 44 form a plurality of inter-tooth areas which are connected to the air inlet of the rotor assembly and have equal or similar air pressures. The second through hole 264 connects the gap 16 and the inter-tooth area, that is, the second through hole 264 is opened at the position of the second sleeve portion 244 to connect the gap 16 and the inter-tooth area, so that the lubricant in the gap 16 can lubricate the entire second part 24 through the second through hole 264.

[0124] Please continue to read Figure 1 and Figure 2 A second channel 12 and at least one third channel 14 are provided in the first shaft body 10 . The second channel 12 is arranged along the axial direction of the first shaft body 10 . Each third channel 14 connects the second channel 12 with the gap 16 so that the lubricant in the second channel 12 enters the gap 16 through the third channel 14 .

[0125] The lubricant in the gap 16 can be introduced through the second channel 12 and the third channel 14 in the first shaft body 10. The second channel 12 can introduce lubricant from the outside and contain the lubricant, and the third channel 14 can be arranged along the radial direction of the first rotor 20, and the second channel 12 is connected with the gap 16, so that the lubricant in the second channel 12 enters the gap 16 through the third channel 14. One end of the second channel 12 can pass through the first shaft body 10, and it can also be understood that an opening is provided at one end of the first shaft body 10, and the opening is connected with the second channel 12, so that the external lubricant is introduced into the second channel 12 through the opening.

[0126] The rotor assembly may further include a first bearing 52 disposed between the first rotor 20 and the first shaft 10, and the first rotor 20 may rotate around the first shaft 10 through the first bearing 52. The first bearing 52 may be a sliding bearing, a rotating bearing, or the like. The first rotor 20 is connected to the first shaft 10 through the first bearing 52, so that the first rotor 20 can rotate around the first shaft 10 through the first bearing 52.

[0127] Please combine Figure 6 and Figure 7 , Figure 6 for Figure 1 The schematic diagram of the structure of the first shaft body in the rotor assembly shown in FIG. Figure 7 for Figure 1 A schematic cross-sectional view of the first rotor and the second rotor in the rotor assembly shown. There are multiple third channels 14, and the outer surface of the first shaft body 10 is provided with a first opening 142 connected to each third channel 14, and multiple first openings 142 are arranged at intervals on the outer surface of the first shaft body 10. Multiple third channels 14 are arranged at intervals on the first shaft body 10. Multiple third channels 14 can allow the lubricant in the second channel 12 to enter the gap 16 faster, and multiple third channels 14 are arranged at intervals on the first shaft body 10, and the lubricant can enter each position of the gap 16 more evenly through the multiple third channels 14, and lubricate each position of the first shaft body 10 more evenly.

[0128] The aperture of the third channel can gradually increase along the liquid inlet direction, that is, the farther away from the liquid inlet end of the second channel, the larger the aperture of the third channel, because the farther the lubricant in the second channel is from the liquid inlet end, the smaller the corresponding hydraulic pressure, thereby making the lubricant entering the gap more balanced.

[0129] The second channel may be straight-cylindrical with a smooth inner wall, which has less resistance to the lubricant and facilitates the lubricant to flow smoothly in the second channel.

[0130] There may be a plurality of first bearings 52. Each first opening 142 is disposed between two adjacent first bearings 52. The first bearings 52 do not block the lubricant from entering the gap 16 through the first opening 142, and the lubricant in the second channel 12 can smoothly enter the gap 16 through the first opening 142 to lubricate the first bearings 52.

[0131] The number of the first openings 142 may be set according to the number of the first bearings 52 , and each first opening 142 is disposed between two adjacent first bearings 52 .

[0132] The outer surface of the first shaft body 10 has a first surface 182 and a second surface 184, wherein when the first rotor 20 rotates around the first shaft body 10, the radial force of the first rotor 20 borne by the first surface 182 is smaller than the radial force of the first rotor 20 borne by the second surface 184, and the first opening 142 on the outer surface of the first shaft body 10 communicating with the third channel 14 is arranged on the first surface 182. The first shaft body 10 can be fixedly arranged, that is, the first shaft body 10 does not rotate, and the first rotor 20 rotates around the first shaft body 10. The outer surface of the non-rotating first shaft body 10 has a first surface 182 and a second surface 184 with different radial forces, and the radial force of the first surface 182 is smaller than the radial force of the second surface 184. The first opening 142 communicating with the third channel 14 is arranged on the first surface 182 with smaller radial force, so that the lubricant in the second channel 12 can enter the gap 16 through the first opening 142. The lubricant forms a film layer in the gap, in which L1 is the radial force direction, and L2 is a schematic diagram of the film layer pressure, and the first opening 142 is arranged on the first surface 182 with smaller radial force.

[0133] The motor directly drives the second rotor, and the second rotor meshes with the first rotor to achieve compression of the medium. The first rotor is driven by the second rotor by tooth meshing. The first rotor and the inner ring of the first bearing, such as the sleeve, are interference fit and rotate as a whole on the first shaft body. The sleeve and the rigid first shaft body are separated by a lubricant such as refrigeration oil and do not have direct contact. A first opening is opened on the first shaft body, and high-pressure refrigeration oil is used to realize the transportation and distribution of refrigeration oil and the relative sliding of the sleeve and the first shaft body, and a film pressure is established in the bearing area of ​​the first bearing to withstand the radial force of the rotor. Due to the periodic intake, compression and exhaust of the rotor assembly, the magnitude of the radial force generated is also periodic, but the indication direction is relatively unchanged. The position of the first opening should be opened in an area that does not bear radial force or bears less radial force. The lubricant enters the first bearing from the area that bears less radial force, and the refrigeration oil is squeezed into the small gap area through the relative sliding of the first rotor and the first shaft body, and a film pressure that balances the radial force is established. Through the circulation of the lubricant between the first shaft body and the first rotor, the heat generated during the relative movement is smoothly taken out by the refrigeration oil.

[0134] The first shaft body 10 may be provided with a groove corresponding to the first opening 142 , and the width of the groove is greater than the width of the first opening 142 . The lubricant first enters the groove with a larger size and then enters the gap 16 , so that the lubricant can enter the gap 16 more easily.

[0135] In this embodiment, the radial distances between the first surface and the second surface and the axis of the first shaft body may be equal or unequal. For example, the outer surface of the first shaft body 10 includes a first surface 182 and a second surface 184 radially adjacent to the first surface, the radial distance between the first surface 182 and the axis of the first shaft body 10 is smaller than the radial distance between the second surface 184 and the axis of the first shaft body 10, and the outer surface of the first shaft body 10 is provided with a first opening 142 communicating with the third channel 14, and the first opening 142 is provided on the first surface 182.

[0136] The radial distance from the first surface 182 to the first rotor 20 is smaller than the radial distance from the second surface 184 to the first rotor 20. There is a certain space between the first surface 182 and the first rotor 20. The lubricant first flows from the first opening 142 to the first surface 182. When the first rotor 20 rotates, the lubricant between the first surface 182 and the first rotor 20 will be squeezed into the gap between the second surface 184 and the first rotor 20, and an oil film will be formed. The space between the first surface 182 and the first rotor 20 can be crescent-shaped. The inner periphery of the first surface 182 can directly abut the outer periphery of the second surface 184. The first surface 182 and the second surface 184 form the outer wall of the first shaft body 10.

[0137] Exemplarily, the first rotor rotates in a counterclockwise direction, and the first surface may be a portion of the upper surface of the first shaft body close to the second rotor and / or a portion of the lower surface of the first shaft body away from the second rotor. The first surface may be a plane or an arc surface, and the arc surface may be an arc surface that is concave toward the axial direction of the first shaft body, or an arc surface that is convex toward the first rotor. Since the gap between the first bearing and the first shaft body is very small, direct contact will occur in the non-membrane layer area and is prone to wear, so the material of the first bearing should be a wear-resistant material, for example, tin bronze, babbitt alloy coating and other materials can be used.

[0138] When there are multiple first bearings 52 between the first shaft body 10 and the first rotor 20, the lubricant enters the gap 16 through the multiple third channels 14, and multiple first bearings 52 can be lubricated at the same time. The number of the third channels 14 can also be set according to the length of the first shaft body 10 or the required dosage of the lubricant, and the number of the third channels 14 can be set according to the number of the first openings 142 of the above embodiment. For example, the number of the third channels 12 can be any value between 2-12. The first rotor 20 is provided with an oil storage tank 28 on the inner side around the first shaft body 10, and the oil storage tank 28 is connected to the gap 16. The oil storage tank 28 can store a certain amount of lubricant and provide the lubricant required by the first bearing 52 during the start-up process of the rotor assembly. The oil storage tank 28 can be annular or spiral. It can be understood that in some other embodiments, one of the first rotor and the first shaft body is a self-lubricating non-metallic material and the other is a metal material. The sliding structure between the first rotor and the first shaft body of different materials can be realized by lubricant, and the first bearing does not need to be set between the first rotor 20 and the first shaft body 10. Exemplarily, the self-lubricating non-metallic material may be a peek material or the like.

[0139] See also Figure 8 , Figure 8 for Figure 1 A schematic cross-sectional view of the first shaft, the first rotor, the second shaft and the second rotor in the rotor assembly shown. The third portion 42 of the second rotor 40 can be integrally formed with the second shaft 30, and the fourth portion 44 of the second rotor 40 can be sleeved on the second shaft 30. The third portion 42 and the second shaft 30 can rotate together, and there is no need to set a connecting structure between the third portion 42 and the second shaft 30, which simplifies the structure. The fourth portion 44 is sleeved on the second shaft 30 and fixed by the connecting structure, so that the fourth portion 44 rotates with the second shaft 30. For example, the fourth portion 44 is connected to the second shaft 30 by interference fit, or the fourth portion 44 is fixedly connected to the second shaft 30 by a snap-fit ​​structure.

[0140] It can be understood that in some other embodiments, the third part and the fourth part can both be sleeved on the second shaft.

[0141] Please combine Fig. 9 And continue to read Figure 1 , Fig. 9 A schematic diagram of the structure of the first part, the third part and the rotor shell provided in an embodiment of the present invention. The rotor assembly may further include a second bearing 54 carrying the second shaft 30, a first bearing shell 53 accommodating the second bearing 54, and a first guide member 72, wherein the first guide member 72 is connected to the first bearing shell 53 to transfer lubricant to the first bearing shell 53 to lubricate the second bearing 54 in the first bearing shell 53.

[0142] The rotor assembly also includes a rotor shell 60 and a second guide member 74 for accommodating the first rotor 20 and the second rotor 40. The rotor shell 60 is provided with a first oil inlet 62 on one side close to the first bearing shell 53. One end of the second guide member 74 is connected to the first bearing shell 53, and the other end is connected to the first oil inlet 62 to transfer the lubricant in the first bearing shell 53 to the rotor shell 60 through the first oil inlet 62. After the lubricant in the first bearing shell 53 lubricates the second bearing 54, it can enter the rotor shell 60 from the first oil inlet 62 on the rotor shell 60, and then enter the compression space to be compressed and discharged together with the others. The first bearing shell 53 and the rotor shell 60 are very close, so the lubricant in the first bearing shell 53 can be discharged nearby.

[0143] The first rotor 20 and the second rotor 40 have a plurality of first inter-tooth regions 462 on one side close to the first bearing housing 53. When the first rotor 20 and the second rotor 40 rotate, the air pressure in the first inter-tooth region 462 facing the first oil inlet 62 is lower than the air pressure in other first inter-tooth regions 462. The lower air pressure in the first inter-tooth region 462 facing the first oil inlet 62 allows the lubricant in the first bearing housing 53 to more easily enter the first inter-tooth region 462 and then be compressed and discharged together with the gas.

[0144] The first inter-tooth region may be a tooth groove of the first rotor or a tooth groove of the second rotor. The second bearing may be a radial bearing or may include a radial bearing and a thrust bearing.

[0145] Please combine Fig.10 And continue to read Figure 1 and Figure 8 , Fig.10 The second shaft 30 includes a first end 32 connected to the motor and a second end 34 opposite to the first end 32 . The second end 34 is disposed in the second bearing 54 .

[0146] The rotor assembly further includes a third bearing 56 sleeved on the first end 32, a second bearing housing 55 accommodating the third bearing 56, and a third flow guide 76. A second channel 12 is provided in the first shaft body 10, one end of the second channel 12 is connected to the third flow guide 76 and the other end is connected to the second bearing housing 55, so as to transfer the lubricant in the second channel 12 to the second bearing housing 55 through the third flow guide 76. The second channel 12 in the first shaft body 10 is used for transmission, and the structure is optimized.

[0147] It is understandable that a storage device for storing lubricant can be provided outside the rotor assembly, and the storage device and the motor are provided on both sides of the first rotor 20 to improve the safety of the storage device. The lubricant in the storage device can be transmitted to the second shaft body 30 shell on the motor side through the second channel 12, and the structure is simplified.

[0148] The rotor assembly may also include a diverter, which includes an oil inlet port, a first oil outlet port, and a second oil outlet port. The oil inlet port is connected to the storage device, the first oil outlet port is connected to the first guide member, and the second oil outlet port is connected to the second channel. The first oil outlet port transfers the lubricant entering from the oil inlet port to the second channel within the first shaft body, and the second oil outlet port transfers the lubricant entering from the oil inlet port to the first bearing shell 53.

[0149] It is understandable that after the first rotor and the second rotor compress and discharge the lubricant and gas mixture, the mixed objects need to be separated and the separated lubricant is reused, that is, the separated lubricant is transmitted to the oil inlet port to realize the recycling of the lubricant.

[0150] The rotor housing 60 is provided with a second oil inlet 64 on one side close to the second bearing housing 55; the rotor assembly further includes a fourth guide member 78, one end of which is in communication with the second bearing housing 55, and the other end of which is in communication with the second oil inlet 64, so as to transfer the lubricant in the second bearing housing 55 to the rotor housing 60 through the second oil inlet 64. The second bearing housing 55 and the rotor housing 60 are very close, so the lubricant in the second bearing housing 55 can be discharged nearby.

[0151] The first rotor 20 and the second rotor 40 have a plurality of second inter-tooth regions 464 on one side close to the second bearing housing 55. When the first rotor 20 and the second rotor 40 rotate, the air pressure in the second inter-tooth region 464 facing the second oil inlet 64 is lower than the air pressure in other second inter-tooth regions 464. The lower air pressure in the second inter-tooth region 464 facing the second oil inlet 64 allows the lubricant in the second bearing housing 55 to more easily enter the second inter-tooth region 464 and then be compressed and discharged together with the gas.

[0152] The third bearing may be a radial bearing, or may include a radial bearing and a thrust bearing. The second inter-tooth region may be a tooth groove of the first rotor or a tooth groove of the second rotor.

[0153] It should be noted that the first part 22 and the third part 42 generate an axial force in a first direction during compression, and the second part 24 and the fourth part 44 generate an axial force in a second direction during compression, and the first direction and the second direction are opposite. If the axial force in the first direction and the axial force in the second direction are completely offset, the bearings supporting the first rotating shaft and the second rotating shaft may only include radial bearings, and no thrust bearing is provided. If the remaining axial force after the axial force in the first direction and the axial force in the second direction are partially offset is very small, the impact of the collision between the first rotor 20 and the second rotor 40 and the rotor shell 60 is also very small, and the bearings supporting the first rotating shaft and the second rotating shaft may only include radial bearings, and no thrust bearing is provided.

[0154] It is understandable that due to manufacturing process problems, the first rotor 20 and the second rotor 40 have a certain tolerance range, resulting in the teeth of the two parts of the first rotor 20 not being completely symmetrical, and the teeth of the two parts of the second rotor 40 not being completely symmetrical, which in turn results in 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. It is necessary to set thrust bearings in two directions. In this embodiment, the structure of the first rotor 20 and / or the second rotor 40 can be changed so that within the tolerance range of the first rotor 20 and the second rotor 40, the axial force in one direction is constantly greater than the axial force in the other direction, so that the resultant force of the axial force generated after the first rotor and the second rotor are engaged and rotated is in a fixed direction, so only one direction thrust bearing can be set, and one direction thrust bearing can be omitted. For example, by changing the structure of the first rotor 20, the axial force in the first direction is greater than the axial force in the second direction. Specifically, at least one of the length, diameter, tooth density, tooth thickness and end profile of the first part 22 or the second part 24 of the first rotor 20 can be changed so that the axial force in the first direction generated by the first part 22 and the third part 42 during compression is greater than the axial force in the second direction generated by the second part 24 and the fourth part 44 during compression. Thus, the thrust bearings corresponding to the axial force in the second direction on the first shaft and the second shaft can be omitted.

[0155] The rotor assembly further includes a first sliding bearing 57 that supports the first portion 22 and a second sliding bearing 58 that supports the second portion 24 . A gap 59 is defined between the first sliding bearing 57 and the second sliding bearing 58 . The gap 59 is connected to the first channel 26 .

[0156] The gap 59 between the first sliding bearing 57 and the second sliding bearing 58 can facilitate the lubricant to enter the first channel 26, and enter the first tooth groove 222 and the second tooth groove 242 through the first channel 26. A protrusion can be provided between the first part 22 and the second part 24 to separate the first part 22 and the second part 24, and there is a gap 59 between the first sliding bearing 57 carrying the first part 22 and the second sliding bearing 58 carrying the second part 24. A spacer can be provided between the second sliding bearing 58 and the second sliding bearing 58 to allow a gap 59 to exist between the two.

[0157] In some other embodiments, please combine Figures 11 to 13 , Fig.11 for Figure 1 A schematic diagram of the matching structure of the first rotor, the second shaft, the first sliding bearing and the second sliding bearing in the rotor assembly is shown, Fig.12 for Fig.11 The schematic diagram of the structure of the first bearing and the second bearing of the first sliding bearing and the second sliding bearing is shown, Fig.13 for Fig.12The rotor assembly further comprises a first sliding bearing 57 for carrying the first part 22 and a second sliding bearing 58 for carrying the second part 24, wherein the first sliding bearing 57 comprises a first bearing bush 572, and the second sliding bearing 58 comprises a second bearing bush 582, the first bearing bush 572 and the second bearing bush 582 are adjacent to each other, a first lubrication gap is provided between the first bearing bush 572 and the first shaft body 10, and a second lubrication gap is provided between the second bearing bush 582 and the first shaft body 10.

[0158] The first bearing 572 includes a third groove 574 near the side of the second bearing 582, and the third groove 574 connects the first channel 26 and the first lubrication gap. The second bearing 582 includes a fourth groove 584 near the side of the first bearing 572, and the fourth groove 584 connects the first channel 26 and the second lubrication gap.

[0159] The first bearing shell 572 and the second bearing 54 may abut against each other, and the lubricant may enter the first passage 26 through the third groove 574 of the first bearing shell 572 and the fourth groove 584 of the second bearing shell 582 .

[0160] The number of the sliding bearings can be set as required, for example, the number of the sliding bearings can be any value between 1 and 6. The number of the second channels can be any value between 2 and 12.

[0161] It should be noted that the first bearing 572 is provided with a connecting hole 576, and the connecting hole 576 connects the inner surface and the outer surface of the first bearing 572, so that the lubricant can lubricate the inner surface and the outer surface of the first bearing 572. The outer wall of the first bearing 572 is also provided with a through groove 578 connected to the connecting hole 576, and the through groove 578 can accelerate the flow of lubricant between the first rotor and the first rotating shaft. Among them, a groove connected to the first channel can be provided on the side of the first bearing 572 bearing close to the air inlet end of the first rotor, so that the lubricant can flow more easily to the first channel of the first rotor. The second bearing is also provided with a connecting hole and a through groove, and the specific structure is similar to the structure of the connecting hole and the through groove of the first bearing, which will not be repeated here.

[0162] In this embodiment, part of the lubricant is used to supply oil to the sliding bearing of the first rotor 20 and enter the inter-rotor volume, and part of the lubricant is used to lubricate the bearings on the left and right sides of the second rotor 40 and enter the inter-rotor volume. Thus, the lubricant after supplying oil to all bearings finally enters the inter-rotor volume to lubricate the meshing of the first rotor 20 and the second rotor 40.

[0163] In this embodiment, all bearings can be lubricated in a limited layout space, including the lubrication and oil supply of the sliding bearing of the first rotor 20, the lubrication and oil supply of the bearings on the left and right sides of the second rotor 40, and the oil supply and lubrication of the meshing of the first rotor 20 and the second rotor 40. At the same time, the oil return port arranged on the exhaust end face solves the disadvantage of tooth tip leakage in the traditional layout.

[0164] For ease of understanding, the rotor assembly may have an oil circuit, such as Fig.14 As shown, Fig.14 for Figure 1 The schematic diagram of the rotor assembly forming the oil circuit is shown. The oil circuit can complete the bearing oil supply of the first rotor 20 and the bearing lubrication oil supply on the left and right sides of the second rotor 40 through a total oil circuit inlet 70. The lubricant after the bearing lubrication finally enters the rotor inter-volume to lubricate the meshing of the first rotor 20 and the second rotor 40. The flow path of the lubricant may include three paths, and the first oil circuit path includes: the total oil circuit inlet 70, the main oil circuit in the first bearing 52, the branch oil circuit in the first bearing 52, the gap 16 between the first bearing 52 and the first rotor 20, the intake end surface of the first part 22 and the second part 24 of the first rotor 20, and the rotor inter-tooth volume. The second oil circuit path includes: the total oil circuit inlet 70, the bearing cavity of the first bearing shell 53, the first oil return port 62, and the rotor inter-tooth volume. The third oil circuit path includes: the total oil circuit inlet 70, the main oil circuit of the first bearing 52, the bearing cavity of the second bearing shell 55, the second oil return port 64, and the rotor inter-tooth volume. The lubrication of the first rotor, the second rotor and all the bearings can be achieved through a total oil circuit inlet.

[0165] A first throttle plug may be provided between the main oil circuit inlet 70 and the main oil circuit in the first bearing 52 to control the amount of lubricant entering the main oil circuit in the first bearing 52. A second throttle plug may be provided between the main oil circuit inlet 70 and the bearing cavity of the first bearing shell 53 to control the amount of lubricant entering the bearing cavity of the first bearing shell 53 in the first bearing 52. A third throttle plug may be provided between the main oil circuit of the first bearing 52 and the bearing cavity of the second bearing shell 55 to control the amount of lubricant entering the bearing cavity of the second bearing shell 55.

[0166] It can be understood that in the above embodiment, the first rotor is a driven rotor and the second rotor is an active rotor, that is, the second rotor drives the first rotor to rotate. In the above embodiment, the first rotor can be a female rotor and the second rotor can be a male rotor, or the first rotor can be a male rotor and the second rotor can be a female rotor.

[0167] Please continue reading Figures 1 to 14The embodiment of the present invention further provides a rotor assembly, which includes a second rotor 40, a second shaft body 30 carrying the second rotor 40, a second bearing 54 sleeved on the second shaft body 30, a rotor shell 60 accommodating the second rotor 40, a first bearing shell 53 accommodating the second bearing 54, and a second guide member 74. The second rotor 40 includes a third portion 42 and a fourth portion 44 with opposite thread rotation directions; a first oil inlet 62 is provided on the side of the rotor shell 60 close to the first bearing shell 53; one end of the second guide member 74 is connected to the first bearing shell 53, and the other end of the second guide member 74 is connected to the first oil inlet 62, so as to transfer the lubricant in the first bearing shell 53 to the rotor shell 60 through the first oil inlet 62.

[0168] After the lubricant in the first bearing shell 53 lubricates the second bearing 54, it can enter the rotor shell 60 from the first oil inlet 62 on the rotor shell 60, and then enter the compression space to be compressed and discharged together with the others. The first bearing shell 53 and the rotor shell 60 are very close, so the lubricant in the first bearing shell 53 can be discharged nearby.

[0169] The first rotor 20 and the second rotor 40 have a plurality of first inter-tooth regions on one side close to the first bearing shell 53. When the first rotor 20 and the second rotor 40 rotate, the air pressure in the first inter-tooth region facing the first oil inlet 62 is lower than that in other first inter-tooth regions. The air pressure in the first inter-tooth region 462 facing the first oil inlet 62 is lower, which allows the lubricant in the first bearing shell 53 to enter the first inter-tooth region 462 more easily and then be compressed and discharged together with the gas.

[0170] The first inter-tooth region may be a tooth groove of the first rotor or a tooth groove of the second rotor.

[0171] The second shaft body 30 includes a first end 32 that is clamped with the motor, and a second end 34 that is arranged opposite to the first end 32, and the second end 34 is arranged in the second bearing 54. A second oil inlet 64 is provided on the side of the rotor shell 60 close to the second bearing shell 55. The rotor assembly also includes a third bearing 56 sleeved on the first end 32, a second bearing shell 55 that accommodates the third bearing 56, and a fourth guide member 78, one end of the fourth guide member 78 is connected to the second bearing shell 55, and the other end of the fourth guide member 78 is connected to the second oil inlet 64, so as to transfer the lubricant in the second bearing shell 55 to the rotor shell 60 through the second oil inlet 64. The second bearing shell 55 and the rotor shell 60 are very close, and the lubricant in the second bearing shell 55 can be discharged nearby.

[0172] The first rotor 20 and the second rotor 40 have a plurality of second inter-tooth regions on one side close to the second bearing housing 55. When the first rotor 20 and the second rotor 40 rotate, the air pressure in the second inter-tooth region facing the second oil inlet 64 is lower than that in other second inter-tooth regions. The air pressure in the second inter-tooth region 464 facing the second oil inlet 64 is lower, which allows the lubricant in the second bearing housing 55 to enter the second inter-tooth region 464 more easily and then be compressed and discharged together with the gas.

[0173] The second inter-tooth region may be a tooth groove of the first rotor or a tooth groove of the second rotor.

[0174] The rotor assembly also includes a first shaft body 10 and a first rotor 20. The first rotor 20 is sleeved on the first shaft body 10. The first rotor 20 includes a first portion 22 and a second portion 24 with opposite threaded directions. The first portion 22 is meshed and connected with the third portion 42, and the second portion 24 is meshed and connected with the fourth portion 44. A gap 16 is provided between the first rotor 20 and the first shaft body 10. The first portion 22 and / or the second portion 24 is provided with a first channel 26. The first channel 26 is communicated with the gap 16 so that the lubricant in the gap 16 enters the meshing space of the first rotor 20 and the second rotor 40 through the first channel 26. The first shaft body 10 is provided with a second channel 12 and a third channel 14 arranged along the axial direction of the first shaft body 10. The second channel 12 is communicated with the gap 16 through the third channel 14.

[0175] The rotor assembly further includes a flow divider 71 and a first flow guide member 72. The flow divider 71 includes an oil inlet port, a first oil outlet port, and a second oil outlet port. The second oil outlet port is communicated with the second channel 12 to transfer the lubricant entering from the oil inlet port to the second channel 12. The first flow guide member 72 is connected to the first oil outlet port and communicated with the first bearing shell 53 to transfer the lubricant entering from the oil inlet port to the first bearing shell 53.

[0176] The rotor assembly further includes a third guide member 76 , one end of which is in communication with the second passage 12 , and the other end of which is in communication with the second bearing shell 55 , so as to transfer the lubricant in the second passage 12 to the second bearing shell 55 .

[0177] The present invention also provides a compressor. Fig.15 , Fig.15 This is a schematic diagram of the structure of a compressor provided in an embodiment of the present invention. The compressor 200 includes a rotor assembly defined in combination with one or more of the above embodiments.

[0178] The compressor 200 further includes a motor 220, which drives the second shaft 30, which drives the second rotor 40, which drives the first rotor 20. The structure of the rotor assembly can be the structure of the rotor assembly in any of the above embodiments, which will not be described in detail.

[0179] An embodiment of the present invention further provides an air conditioner, which includes a compressor defined in combination with one or more of the above embodiments.

[0180] The embodiments of the present invention are described in detail above. Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A rotor assembly, characterized in that: include: A first rotor, comprising a first part and a second part with opposite thread rotation directions, the first part comprising a plurality of first teeth, two adjacent first teeth forming a first tooth groove, the second part comprising a plurality of second teeth, two adjacent second teeth forming a second tooth groove, the first rotor being provided with a first channel opened in the first part and / or the second part, the first channel being communicated with the first tooth groove and / or the second tooth groove, the area between the first part and the second part being an air intake area, the end surface of the first part close to the second part and the end surface of the second part close to the first part being an air intake end surface, the air intake end surface of the first part and the air intake end surface of the second part being adjacent, the end surface of the first part facing away from the second part and the end surface of the second part facing away from the first part being an air outlet end surface, the first channel comprising a first groove, the first groove being arranged on the air intake end surface of the first part; as well as A first shaft body carries the first rotor, a gap is defined between the first shaft body and the first rotor, the first groove connects the gap and the first tooth groove, and the gap is connected to the first groove so that lubricant in the gap enters the first tooth groove and / or the second tooth groove through the first groove.

2. The rotor assembly according to claim 1, characterized in that: The first part further includes a first sleeve portion arranged between the first tooth portion and the first shaft body, the second part further includes a second sleeve portion arranged between the second tooth portion and the first shaft body, and the first channel is arranged in the first sleeve portion and / or the second sleeve portion.

3. The rotor assembly according to claim 2, characterized in that: The first sleeve connection portion includes a first side edge close to the second sleeve connection portion, and the first channel includes a first groove arranged on the first side edge, and the first groove communicates with the gap and the first tooth groove.

4. The rotor assembly according to claim 3, characterized in that: One end of the first groove communicating with the first tooth groove is disposed between two first tooth portions, or the first groove extends from the first side to the first tooth portion.

5. The rotor assembly according to claim 3, characterized in that: The first side is also provided with a first oil storage cavity communicated with the first channel.

6. The rotor assembly according to claim 5, characterized in that The first oil storage chamber is provided with a first drainage groove communicating with the first channel on the first side.

7. The rotor assembly according to claim 2 or 3, characterized in that: The second sleeve connection portion includes a second side edge close to the first sleeve connection portion, the first channel includes a second groove arranged on the second side edge, and the second groove communicates with the gap and the second tooth groove.

8. The rotor assembly according to claim 7, characterized in that One end of the second groove communicating with the second tooth groove is arranged between two second tooth portions, or the second groove extends from the second side to the second tooth portion.

9. The rotor assembly according to claim 7, characterized in that: The second side is further provided with a second oil storage cavity communicated with the first channel, and the second oil storage cavity is provided with a second drainage groove communicated with the first channel on the second side.

10. The rotor assembly according to any one of claims 2 to 6, characterized in that: The first passage includes a first through hole penetrating the first sleeve portion and a second through hole penetrating the second sleeve portion, the first through hole communicating with the gap and the first tooth groove, and the second through hole communicating with the gap and the second tooth groove.

11. The rotor assembly according to claim 1, characterized in that A second channel and at least one third channel are provided in the first shaft body. The second channel is arranged along the axial direction of the first shaft body. The third channel connects the second channel with the gap so that the lubricant in the second channel enters the gap through the third channel.

12. The rotor assembly according to claim 11, characterized in that The rotor assembly further comprises: A first bearing is disposed between the first rotor and the first shaft, and the first rotor rotates around the first shaft through the first bearing.

13. The rotor assembly according to claim 12, characterized in that There are multiple third channels, and the outer surface of the first shaft body is provided with a first opening communicating with each of the third channels, and multiple first openings are arranged at intervals on the outer surface of the first shaft body.

14. The rotor assembly according to claim 13, characterized in that There are multiple first bearings, and each first opening is disposed between two adjacent first bearings.

15. The rotor assembly according to claim 11, characterized in that The outer surface of the first shaft body has a first surface and a second surface. When the first rotor rotates around the first shaft body, the radial force of the first rotor borne by the first surface is smaller than the radial force of the first rotor borne by the second surface. The outer surface of the first shaft body is provided with a first opening connected to the third channel, and the first opening is arranged on the first surface.

16. The rotor assembly according to claim 11, characterized in that The outer surface of the first shaft body includes a first surface and a second surface radially adjacent to the first surface, the radial distance from the second surface to the axis of the first shaft body is greater than the radial distance from the first surface to the axis of the first shaft body, the outer surface of the first shaft body is provided with a first opening connected to the third channel, and the first opening is arranged on the first surface.

17. The rotor assembly according to claim 11, characterized in that An oil storage tank is provided inside the first rotor and is arranged around the first shaft body. The oil storage tank is communicated with the gap.

18. The rotor assembly according to claim 1, wherein: The rotor assembly further comprises: a second rotor, the second rotor comprising a third portion and a fourth portion having opposite thread directions, the third portion being meshedly connected to the first portion, and the fourth portion being meshedly connected to the second portion; and The second shaft carries the second rotor.

19. The rotor assembly according to claim 18, characterized in that The third part is integrally formed with the second shaft body, and the fourth part is sleeved on the second shaft body.

20. The rotor assembly according to claim 18, wherein: The rotor assembly further comprises: A second bearing, carrying the second shaft body; a first bearing housing accommodating the second bearing; and The first guide member is communicated with the first bearing shell to transmit the lubricant into the first bearing shell.

21. The rotor assembly according to claim 20, characterized in that The rotor assembly further comprises: A rotor shell, accommodating the first rotor and the second rotor, wherein a first oil inlet is provided on a side of the rotor shell close to the first bearing shell; A second guide member has one end connected to the first bearing shell and the other end connected to the first oil inlet, so as to transfer the lubricant in the first bearing shell to the rotor shell through the first oil inlet.

22. The rotor assembly according to claim 21, characterized in that The first rotor and the second rotor have a plurality of first inter-tooth regions on one side close to the first bearing shell. When the first rotor and the second rotor rotate, the air pressure in the first inter-tooth region facing the first oil inlet is lower than the air pressure in other first inter-tooth regions.

23. The rotor assembly according to claim 21, characterized in that The second shaft body comprises a first end portion engaged with the motor and a second end portion arranged opposite to the first end portion, and the second end portion is arranged in the second bearing; The rotor assembly further comprises: A third bearing, sleeved on the first end portion; a second bearing housing, accommodating the third bearing; a third flow guide member, connected to the second bearing shell; A second channel is disposed in the first shaft body, and the second channel is communicated with the third flow guide member so as to transmit the lubricant in the second channel to the second bearing shell through the third flow guide member.

24. The rotor assembly according to claim 23, characterized in that A second oil inlet is provided on one side of the rotor shell close to the second bearing shell; The rotor assembly also includes a fourth guide member, one end of which is connected to the second bearing shell, and the other end of which is connected to the second oil inlet, so as to transfer the lubricant in the second bearing shell to the rotor shell through the second oil inlet.

25. The rotor assembly according to any one of claims 20 to 23, characterized in that: The rotor assembly further comprises: The flow divider includes an oil inlet port, a first oil outlet port and a second oil outlet port. The first oil outlet port is connected to the first guide member to transfer the lubricant entering from the oil inlet port to the first bearing shell. The second oil outlet port is connected to the gap through a second channel in the first shaft body to transfer the lubricant entering from the oil inlet port to the gap.

26. The rotor assembly of claim 1, wherein: The rotor assembly further includes a first sliding bearing for carrying the first portion and a second sliding bearing for carrying the second portion. A gap is defined between the first sliding bearing and the second sliding bearing, and the gap is communicated with the first passage.

27. The rotor assembly of claim 1, wherein: The rotor assembly further comprises a first sliding bearing for carrying the first part and a second sliding bearing for carrying the second part, the first sliding bearing comprises a first bearing shell, the second sliding bearing comprises a second bearing shell, the first bearing shell and the second bearing shell are adjacent to each other, a first lubrication gap is defined between the first bearing shell and the first shaft body, and a second lubrication gap is defined between the second bearing shell and the first shaft body; The first bearing shell includes a third groove on a side close to the second bearing shell, and the third groove connects the first channel and the first lubrication gap. The second bearing shell includes a fourth groove on a side close to the first bearing shell, and the fourth groove connects the first channel and the second lubrication gap.

28. A compressor, characterized in that: include: A rotor assembly, wherein the rotor assembly is the rotor assembly according to any one of claims 1-27.

29. An air conditioner, characterized in that: include: A compressor, the compressor being the compressor according to claim 28.

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