CN112797000A - Rotor subassembly, compressor and air conditioner - Google Patents

Abstract

The rotor assembly comprises a first shaft and a rotating part which is rotatably arranged on the first shaft, a lubricating gap is formed between the rotating part and the first shaft, wherein an oil storage groove communicated with the lubricating gap is formed in the rotating part, the rotor assembly is provided with the oil storage groove communicated with the lubricating gap on the rotating part, and a certain lubricant is stored in the oil storage groove, so that parts in the rotor assembly can be lubricated by the lubricant in the oil storage groove directly at the initial working stage of the rotor assembly, and the problem that the rotating part is abraded due to the fact that the lubricating pipeline system cannot provide lubrication for the rotor assembly due to insufficient pressure at the initial working stage is solved.

Description

Rotor subassembly, compressor and air conditioner

Technical Field

The invention relates to the technical field of compressors, in particular to a rotor assembly, a compressor and an air conditioner.

Background

In general, during the process that a rotor of a rotor assembly rotates around a rotating shaft through a structure such as a sliding bearing or is in meshing transmission with other rotors, in order to avoid abrasion caused by rigid contact between the rotors which are meshed with each other in the rotor assembly or between the rotor and the rotating shaft, lubrication and cooling are required to be carried out through a lubricant.

Disclosure of Invention

The embodiment of the invention provides a rotor assembly, a compressor and an air conditioner, and aims to solve the problem that components in the rotor assembly are abraded due to the fact that the existing rotor assembly cannot be lubricated in time due to insufficient pressure of a lubrication pipeline system in the initial starting stage.

In order to solve the above problems, the technical scheme provided by the invention is as follows:

a first aspect of an embodiment of the present invention provides a rotor assembly, including:

a first shaft; and

the rotating part is rotatably arranged on the first shaft and comprises at least one first rotor capable of rotating around the first shaft, and a lubricating gap is formed between the rotating part and the first shaft;

wherein, be equipped with on the rotation piece with the oil storage tank of lubricated clearance intercommunication.

In some embodiments, the oil reservoir includes a first oil reservoir communicating with the lubrication gap, the first oil reservoir being disposed on an inner wall of the first rotor facing the first shaft.

In some embodiments, the rotor further comprises a support member rotatably disposed on the first shaft between the first shaft and the first rotor, the support member being fixedly connected with the first rotor, the lubrication gap being between the support member and the first shaft;

wherein, the oil storage tank includes with the second oil storage tank of lubricated clearance intercommunication, the second oil storage tank set up in the supporting member is towards on the inner wall of primary shaft.

In some embodiments, the oil reservoir includes a third oil reservoir in communication with the lubrication gap, and the first rotor includes:

the third oil storage tank is arranged on the air suction end;

and the at least one communicating groove is formed in the air suction end and communicated with the third oil storage groove, and the communicating groove is used for guiding the lubricant in the third oil storage groove out of the air suction end.

In some embodiments, the first oil reservoir is disposed on an inner wall of the first rotor facing the first shaft in a ring shape around the first shaft.

In some embodiments, the first rotor includes a plurality of first helical blades, and the first oil reservoir is helically disposed about the first shaft at a position corresponding to one of the first helical blades.

In some embodiments, a first channel is disposed axially along the first shaft and at least a second channel communicates the first channel with the lubrication gap.

In some embodiments, the rotor assembly further comprises:

a second shaft; and

and the second rotor is fixed on the second shaft, is meshed with the first rotor and is used for driving the first rotor to rotate relative to the first shaft.

In some embodiments, the rotor assembly includes two second rotors, the rotating member includes two first rotors, the two first rotors are coaxially arranged on the first shaft, the rotation directions of the two first rotors are opposite, the two second rotors are symmetrically arranged on the second shaft, and the rotation directions of the two second rotors are opposite.

In some embodiments, the rotor assembly further comprises:

the first bearing housing is arranged at one end of the second shaft, a first bearing cavity is formed between the first bearing housing and the second shaft, a first bearing arranged on the second shaft is accommodated in the first bearing cavity, and the first bearing cavity is communicated with the first channel; and

the first rotor and the second rotor are contained in the rotor shell, and a first oil return port communicated with the first bearing cavity is formed in the rotor shell.

In some embodiments, the rotor assembly further comprises:

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

one output end of the flow dividing piece is communicated with the second bearing cavity, and the other output end of the flow dividing piece is communicated with the second bearing cavity through the first channel;

and a second oil return port communicated with the second bearing cavity is formed in the rotor shell.

A second aspect of embodiments of the present invention provides a compressor comprising a rotor assembly as provided in the first aspect of the present invention.

A third aspect of the embodiments of the present invention provides an air conditioner including the compressor provided in the second aspect of the present invention.

Based on the technical scheme provided by the invention, the rotor assembly comprises a first shaft and a rotating part which is rotatably arranged on the first shaft, and a lubricating gap is formed between the rotating part and the first shaft, wherein the rotating part is provided with an oil storage groove communicated with the lubricating gap.

Drawings

The technical solution and other advantages of the present application will become apparent from the detailed description of the embodiments of the present application with reference to the accompanying drawings.

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

fig. 2 is a second structural schematic diagram of a rotor assembly provided in an embodiment of the present application;

FIG. 3 is a third structural schematic diagram of a rotor assembly provided in an embodiment of the present application;

fig. 4 is a schematic cross-sectional structure view of a first rotor at a first oil storage groove according to an embodiment of the present disclosure;

FIG. 5 is a schematic view of a half-section of a first rotor according to an embodiment of the present disclosure;

FIG. 6 is a schematic view of a suction end of a first rotor according to an embodiment of the present disclosure;

fig. 7 is a schematic perspective view of a shaft sleeve according to an embodiment of the present disclosure;

fig. 8 is a fourth structural schematic diagram of a rotor assembly provided in an embodiment of the present application;

fig. 9 is a schematic structural view of a first oil return port, a first rotor and a second rotor in a rotor assembly according to an embodiment of the present disclosure;

fig. 10 is a schematic structural diagram of a second oil return port, a first rotor and a second rotor in a rotor assembly provided by an embodiment of the present application.

Each reference numeral represents:

100. a first shaft, 110, a first channel, 120, a second channel; 130. lubricating the gap;

200. a rotating member; 210. a first rotor; 211. a first oil reservoir; 212. a first helical blade; 213. a first tooth slot; 214. a suction end; 215. a flow guide channel; 216. a communicating groove; 217. a third oil reservoir;

220. a support member; 221. a shaft sleeve; 2211. a communicating hole; 2212. a guide groove; 222. an oil guide gap; 223. oil guide hole:

300. a second shaft; 310. a second rotor; 311. a second helical blade; 312. a second tooth slot; 320. a first bearing housing; 321. a first bearing cavity; 322. a first bearing; 330. a second bearing housing; 331. a second bearing cavity; 332. a second bearing;

400. a rotor housing; 410. a first oil return port; 420. a second oil return port; 430. an engagement space; 431. a first engagement subspace; 432. a second engagement subspace;

500. a flow divider; 510. a shunting cavity; 520. a main oil inlet, 530, a first oil outlet; 540. a second oil outlet.

Detailed Description

Specific structural and functional details disclosed herein are merely representative and are provided for purposes of describing example embodiments of the present application. This application may, however, be embodied in many alternate forms and should not be construed as limited to only the embodiments set forth herein.

In the description of the present application, the terms "first", "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless otherwise specified. Furthermore, the term "comprises" and any variations thereof is intended to cover non-exclusive inclusions.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

The present application is further described below with reference to the accompanying drawings and examples.

As shown in fig. 1 to fig. 2, a rotor assembly provided by an embodiment of the present application includes a first shaft 100 and a rotating member 200 rotatably disposed on the first shaft 100, wherein the rotating member 200 is rotatably disposed on the first shaft 100 and includes at least one first rotor 210 capable of rotating around the first shaft 100, and a lubrication gap 130 is formed between the rotating member 200 and the first shaft 100; wherein, an oil storage groove communicated with the lubricating gap 130 is provided on the rotating member 200.

It can be understood that, in the process of the rotor assembly rotating around the rotating shaft or meshing transmission between the rotor and other rotors through structures such as sliding bearings and the like, in order to avoid the abrasion of the rotors which are meshed with each other in the rotor assembly or the rigid contact between the rotors and other components such as the rotating shaft, the lubrication and cooling are required to be carried out through the lubricant. In this embodiment, 200 is provided with the oil storage tank that lubricates clearance 130 intercommunication, stores certain emollient through the oil storage tank, is convenient for at the initial work stage of rotor subassembly, directly lubricate the part in the rotor subassembly through the emollient in the oil storage tank, has avoided because the not enough problem that leads to rotating member 200 wearing and tearing for the rotor subassembly provides lubrication for initial work stage lubrication pipe-line system pressure. In one embodiment, as shown in fig. 2 to 3, the oil reservoir includes a first oil reservoir 211 communicating with the lubrication gap, and the first oil reservoir 211 is disposed on an inner wall of the first rotor 210 facing the first shaft 100; it can be understood that, certain lubricant is stored in the first oil storage groove 211, so that the first shaft 100 and the rotating member 200 rotating relatively can be lubricated directly by the lubricant in the oil storage groove in the initial working stage of the rotor assembly, and the problem that the first shaft 100 and the rotating member 200 are abraded due to insufficient pressure of the lubrication pipeline system in the initial working stage and the rotor assembly cannot be lubricated is avoided.

It should be noted that the rotating member 200 may only include the first rotor 210, and the first rotor 210 may be directly sleeved on the first shaft 100, and in this structure, the lubrication gap 130 is located between the first shaft 100 and the first rotor 210; at this time, the first rotor 210 and the first shaft 100 form a sliding bearing structure, the first shaft 100 corresponds to an inner ring of the sliding bearing structure, the first rotor 210 may rotate on the first shaft 100 as an outer ring of the sliding bearing structure, and, in order to improve the friction property between the first rotor 210 and the first shaft 100, a layer of anti-wear material such as babbitt metal may be disposed inside the first rotor 210 or on the first shaft 100, thereby increasing the service life of the rotor assembly. In an embodiment, as shown in fig. 2 to 3, the rotating member 200 further includes a supporting member 220, the supporting member 220 is rotatably disposed on the first shaft 100 and located between the first shaft 100 and the first rotor 210, the supporting member 220 is fixedly connected to the first rotor 210, and the lubricating gap 130 is located between the supporting member 220 and the first shaft 100, wherein the oil storage groove includes a second oil storage groove (not shown) communicating with the lubricating gap 130, and the second oil storage groove is disposed on an inner wall of the supporting member 220 facing the first shaft 100. It is understood that the rotating member 200 may further include a supporting member 220, the supporting member 220 is rotatably disposed on the first shaft 100 and located between the first shaft 100 and the first rotor 210, so as to prevent the first rotor 210 from directly contacting the first shaft 100 to cause wear, and the lubricating gap 130 is located between the supporting member 220 and the first shaft 100; the first rotor 210 and the first shaft 100 form a sliding bearing structure, the first shaft 100 is equivalent to an inner ring of the sliding bearing structure, the supporting member 220 can serve as an outer ring of the sliding bearing structure to rotate on the first shaft 100, obviously, a certain amount of lubricant is stored in the second oil storage tank, so that the first shaft 100 and the rotating member 200 which rotate relatively can be lubricated directly by the lubricant in the oil storage tank in the initial working stage of the rotor assembly, and the problem that the first shaft 100 and the rotating member 200 are abraded because the lubricating pipeline system cannot provide lubrication for the rotor assembly due to insufficient pressure in the initial working stage is avoided; specifically, the supporting member 220 may be made of a wear-resistant material, and the supporting member 220 is fixedly connected to the first rotor 210, and during the rotation of the supporting member 220 relative to the first shaft 100, the supporting member 220 and the first rotor 210 may rotate together around the first shaft 100, in this embodiment, the first rotor 210 and the supporting member 220 may be fixedly connected by a tight fit, and specifically, the first rotor 210 and the supporting member 220 may be in an interference fit.

In an embodiment, as shown in fig. 2, the first oil reservoir 211 and the second oil reservoir may be simultaneously configured, and at this time, the rotor 200 includes a supporting member 220 and a first rotor 210 sleeved outside the supporting member 220 and fixedly connected to the supporting member 220, the support member 220 is provided with an oil guide hole 223 for communicating the first oil reservoir 211 with the lubrication gap 130, it is understood that, the oil guide hole 223 is directly opened on the support member 220, in order to communicate the first oil storage groove 211 with the lubrication gap 130, in this embodiment, the oil guide hole 223 may be formed at any position on the support member 220, so as to facilitate the arrangement of the positions of the first oil storage groove 211 and the lubrication gap 130, and specifically, may be formed on the support member 220 according to the requirements of the first oil storage groove 211 and the lubrication gap 130; in this embodiment, when the supporting member 220 at least includes a sleeve 221, the oil guiding hole 223 can be directly opened on the sleeve 220.

In one embodiment, as shown in fig. 2 to 3, the supporting member 220 includes at least two bushings 221, the bushings 221 are rotatable relative to the first shaft 100, the first rotor 210 is correspondingly sleeved on at least two bushings 221, and an oil guiding gap 222 for communicating the first oil storage groove 211 with the lubricating gap 130 is formed between two adjacent bushings 221.

It can be understood that the oil guiding gap 222 for communicating the first oil storage groove 211 with the lubricating gap 130 is formed between the two shaft sleeves 221, that is, according to the specific structure of the supporting member 220, the oil guiding gap 222 is directly formed between the two shaft sleeves 221 by using the position relation of the two shaft sleeves 221 coaxially arranged on the first shaft 100, so as to guide the lubricant in the first oil storage groove 211 into the oil guiding gap 222 for lubrication, obviously, compared with the structure of directly arranging the oil guiding hole 223 on the supporting member 220, not only the problem that the oil guiding hole 223 needs to be additionally manufactured on the supporting member 220, which leads to the increase of cost and possibly influences the mechanical performance of the supporting member 220, is avoided, but also the oil guiding gap 222 is formed between the two shaft sleeves 221 by fully utilizing the position structure between the two shaft sleeves 221, without processing the shaft sleeves 221, the universality of standard parts such as the shaft sleeve 221 and the like is ensured.

In one embodiment, as shown in fig. 4, the first oil chamber 211 is disposed around the first shaft 100 in a ring shape on a side of the first rotor 210 close to the first shaft 100; it is to be understood that, the first oil reservoir 211 is annularly disposed around the first shaft 100, in the embodiment where the oil guide hole 223 is formed on the support member 220 or the oil guide gap 222 is formed between the two bushings 221 of the support member 220, the annular first oil storage groove 211 is at least partially corresponding to the oil guide hole 223 or the oil guide gap 222, so that the first oil reservoir 211 communicates with the lubrication gap 130 through the oil guide hole 223 or the oil guide gap 222, in the present embodiment, when the first oil reservoir 211 communicates with the lubrication gap 130 through the oil guide hole 223, the oil guide hole 223 may be provided according to the position of the first oil reservoir 211, so as to increase the communication area between the oil guide hole 223 and the first oil storage groove 211, and to improve the oil storage of the first oil storage groove 211 and the efficiency of guiding oil to the lubricating gap 130; when the first oil storage tank 211 is communicated with the lubricating gap 130 through the oil guide gap 222, the annular first oil storage tank 211 can be exactly located corresponding to the oil guide gap 222, so as to maximize the conduction area between the oil guide gap 222 and the first oil storage tank 211, and to improve the oil storage efficiency of the first oil storage tank 211 and the oil guide efficiency of the lubricating gap 130.

In one embodiment, as shown in fig. 5, the first rotor 210 includes a plurality of first helical blades 212, and the first oil groove 211 is spirally disposed around the first shaft 100 at a position corresponding to one of the first helical blades 212. It can be understood that, in the embodiment where the first oil storage groove 211 is spirally disposed around the first shaft 100, and the oil guide hole 223 is disposed on the supporting member 220 or the oil guide gap 222 is formed between the two bushings 221 of the supporting member 220, the position of the first oil storage groove 211 at least partially corresponds to the position of the oil guide hole 223 or the oil guide gap 222, so as to ensure that the first oil storage groove 211 is communicated with the oil guide hole 223 or the oil guide gap 222, in the embodiment, the spiral first oil storage groove 211 may be a position corresponding to one of the first helical blades 212, that is, the first oil storage groove 211 is disposed at a position corresponding to the maximum thickness of the first rotor 210, so as to reduce the influence of the opening of the first oil storage groove 211 on the mechanical performance of the first rotor 210.

Obviously, the oil guide hole 223 is formed on the supporting member 220 and the oil guide gap 222 is formed between the two bushings 221 of the supporting member 220, and for the convenience of understanding, in the following embodiments of the present application, the oil guide gap 222 is formed between the two bushings 221 of the supporting member 220.

In one embodiment, as shown in fig. 2, 3 and 6, the oil storage grooves include a third oil storage groove 217 communicated with the lubrication gap 130, the first rotor 210 includes a suction end 214 and at least one communicating groove 216, the communicating groove 216 and the third oil storage groove 217 are both disposed on the suction end 214, the communicating groove 216 is communicated with the third oil storage groove 217, and the communicating groove 216 is used for guiding out lubricant in the third oil storage groove 217 from the suction end 214; it is understood that the first rotor 210 may further include a flow guide channel 215 disposed on the suction end 214, the lubrication gap 130 communicates with the third oil reservoir 217 through the guide passage 215, the guide passage 215 guides the lubricant in the lubrication gap 130 to the third oil reservoir 217, through the arrangement of the flow guide channel 215, the communication groove 216 and the third oil storage groove 217, the lubricant in the lubrication gap 130 can be guided out from the guide passage 215 to the third oil reservoir 217, the lubricant guided to the third oil reservoir 217 may be further guided to the tooth grooves of the first rotor 210 through the communication groove 216, and then discharged from the discharge end of the first rotor 210 as the first rotor 210 rotates, wherein the exhaust end and the suction end 214 are respectively located at both ends of the first rotor 210; obviously, a certain amount of lubricant is stored in the third oil storage groove 217, so that the tooth grooves of the first rotor 210 can be lubricated directly by the lubricant in the oil storage groove at the initial working stage of the rotor assembly, and the problem that the first rotor 210 is abraded due to insufficient pressure of a lubrication pipeline system at the initial working stage and the fact that lubrication cannot be provided for the rotor assembly is avoided.

Specifically, as shown in fig. 6, the first rotor 210 includes a plurality of first helical blades 212, a first tooth groove 213 is formed between any two adjacent first helical blades 212, the air suction end 214 is provided with at least one connecting groove 216 and at least one third oil storage groove 217 communicated with the connecting groove 216, the third oil storage groove 217 is communicated with the first tooth groove 213 through the connecting groove 216, and the flow guide channel 215 can be communicated with the third oil storage groove 217, so that the lubricant guided out from the flow guide channel 215 is guided into the first tooth groove 213 through the third oil storage groove 217 and the connecting groove 216 in sequence, and the first rotor 210 is lubricated.

As shown in fig. 7, the bushing 221 is provided with a communication hole 2211, and the communication hole 2211 communicates the inner surface and the outer surface of the bushing 221 so that lubricant can lubricate the inner surface and the outer surface of the bushing 221. The outer wall of the bushing 221 is further provided with a guide groove 2212 communicating with the communication hole 2211, and the guide groove 2212 can accelerate the flow of the lubricant between the first rotor 210 and the first shaft 100, so that the lubricant can more easily flow to the communication groove 216 of the first rotor 210. In an embodiment, as shown in fig. 1 to 3, a first channel 110 disposed along the axial direction of the first shaft 100 and at least a second channel 120 communicating the first channel 110 with the lubrication gap 130 are disposed in the first shaft 100, and it is understood that the first channel 110 and at least a second channel 120 are used for guiding lubricant in an external lubrication pipeline to the lubrication gap 130 and the first oil storage groove 211, wherein the first channel 110 may be communicated with the external lubrication pipeline, so that the lubricant is guided to the lubrication gap 130, the oil guide gap 222 and the first oil storage groove 211 through the second channel 120, in this embodiment, the first channel 110 may be disposed along the axial direction of the first shaft 100, a plurality of second channels 120 may be disposed in the first shaft 100, wherein at least a position of the second channel 120 may correspond to a position of the oil guide gap 222, the conduction area between the second channel 120 and the oil guide gap 222 is increased, and meanwhile, the second channels 120 may be respectively disposed at different positions corresponding to the oil guide gap 222, so that the oil storage function of the first oil storage groove 211 can be well realized when the lubricant is introduced through the second channels 120.

In this embodiment, the second channels 120 are disposed on the first shaft 100 at intervals. The plurality of second passages 120 allow the lubricant in the first passage 110 to enter the lubrication gap 130 more quickly, and the plurality of second passages 120 are arranged on the first shaft 100 at intervals, so that the lubricant can enter the lubrication gap 130 at various positions more uniformly through the plurality of second passages 120, and the lubricant can lubricate the first shaft 100 at various positions more uniformly; in addition, the pore size of the second channel 120 may become gradually larger in the liquid inlet direction, that is, the farther from the liquid inlet end of the first channel 110, the larger the pore size of the second channel 120, because the farther the lubricant in the first channel 110 is from the liquid inlet end, the corresponding hydraulic pressure is smaller, so that the lubricant entering the gap may be more balanced.

In one embodiment, as shown in fig. 8, the rotor assembly further includes a second shaft 300 and at least one second rotor 310 fixed on the second shaft 300, the second rotor 310 is engaged with the first rotor 210 and is used for driving the first rotor 210 to rotate relative to the first shaft 100; the first rotor 210 comprises a plurality of first helical blades 212, a first tooth space 213 is formed between any two adjacent first helical blades 212, the second rotor 310 comprises a plurality of second helical blades 311, a second tooth space 312 is formed between any two adjacent second helical blades 311, and the first rotor 210 and the second rotor 310 are in meshing transmission through the first helical blades 212 and the second helical blades 311; it should be noted that, when the first rotor 210 and the second rotor 310 start to perform meshing transmission in the initial working stage of the rotor assembly, a certain amount of lubricant may be stored in the third oil storage groove 217, and the tooth grooves of the first rotor 210 are directly lubricated by the lubricant in the oil storage groove, that is, the first rotor 210 and the second rotor 310 are lubricated in the meshing transmission, so as to avoid the problem that the first rotor 210 and the second rotor 310 are worn due to insufficient pressure in the lubrication line system in the initial working stage and the rotor assembly cannot be lubricated.

In an embodiment, the first rotor 210 may be made of a self-lubricating non-metallic material, and the first shaft 100 may be made of a hard alloy material; of course, it is also possible to use a cemented carbide material for the first rotor 210 and a self-lubricating non-metallic material for the first shaft 100.

In one embodiment, the second rotor 310 may be made of a self-lubricating non-metallic material. When the first rotor 210 is made of a hard alloy steel material and the second rotor 310 is made of a self-lubricating non-metallic material, the first rotor 210 and the second rotor 310 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 in the operation process of the compressor are reduced.

In one embodiment, as shown in fig. 8, the rotor assembly includes two second rotors 310, the rotating member 200 includes two first rotors 210, the two first rotors 210 are coaxially disposed on the first shaft 100, the two second rotors 310 are coaxially disposed on the second shaft 300, the rotation directions of the two first rotors 210 are opposite, and the rotation directions of the two second rotors 310 are opposite. It can be understood that the rotor assembly may be a four-rotor structure, two first rotors 210 symmetrically arranged on the first shaft 100 have opposite rotation directions, each first rotor 210 is engaged with one second rotor 310, and the end surfaces of the two first rotors 210 close to each other are joined, that is, the two air suction ends 214 of the two first rotors 210 are joined, so that the compressor including the rotor assembly sucks air from the joint, and the air respectively flows to the first rotors 210 on both sides for compressing and exhausting, thereby making the structure of the whole compressor more compact; moreover, the first oil storage grooves 211 are formed in the two first rotors 210, so that the first shaft 100 and the support member 220 which rotate relatively are lubricated by the lubricant in the respective first oil storage grooves 211 directly in the initial working stage of the rotor assembly, and the problem that the first shaft 100 and the support member 220 are abraded due to the fact that the pressure of a lubrication pipeline system is insufficient in the initial working stage and the rotor assembly cannot be lubricated is solved.

It should be noted that, as shown in fig. 8, in two pairs of first and second rotors 210 and 310 engaged with each other, one pair of the first and second rotors 210 and 310 generates an axial force in a first direction during compression, and the other pair of the first and second rotors 210 and 310 generates an axial force in a second direction during compression, where the first and second directions are parallel to the axial direction of the first shaft 100 and opposite to each other, if the axial force in the first direction and the axial force in the second direction completely cancel each other, the problem of excessive axial force can be solved.

In an embodiment, as shown in fig. 8 to 10, the rotor assembly further includes a first bearing housing 320 and a rotor housing 400, the first bearing housing 320 is disposed at one end of the second shaft 300, a first bearing cavity 321 is formed between the first bearing housing 320 and the second shaft 300, a first bearing 322 disposed on the second shaft 300 is received in the first bearing cavity 321, and the first bearing cavity 321 is communicated with the first channel 110; the first rotor 210 and the second rotor 310 are accommodated in the rotor housing 400, and the rotor housing 400 is provided with a first oil return port 410 communicated with the first bearing cavity 321.

It can be understood that the first bearing housing 320 is used for housing the first rotating shaft, the rotor housing 400 is used for housing the first rotor 210 and the second rotor 310, the first bearing cavity 321 is communicated with the first channel 110 on the first shaft 100, lubricant in the first channel 110 can be introduced into the first bearing cavity 321, so as to lubricate the first bearing 322, and the rotor housing 400 is further provided with a first oil return port 410 communicated with the first bearing cavity 321, so as to facilitate the introduction of lubricant in the first bearing cavity 321 into the rotor housing 400, so as to lubricate the engaged first rotor 210 and second rotor 310; it is noted that before the lubricant is introduced from the first passage 110 into the first bearing chamber 321, the lubricant in the first passage 110 may be introduced not only directly into the second oil reservoir but also into the lubrication gap 130 and the first oil reservoir 211 through the second passage 120.

In an embodiment, as shown in fig. 8 to 10, the rotor assembly further includes a second bearing housing 330 and a flow divider 500, the second bearing housing 330 is disposed at an end of the second shaft 300 far from the first bearing housing 320, a second bearing cavity 331 is disposed between the second bearing housing 330 and the second shaft 300, a second bearing 332 disposed on the second shaft 300 is accommodated in the second bearing cavity 331, an output end of the flow divider 500 is communicated with the second bearing cavity 331, another output end of the flow divider 500 is communicated with the second bearing cavity 331 through the first passage 110, and a second oil return port 420 communicated with the second bearing cavity 331 is disposed on the rotor housing 400.

As can be appreciated, the second bearing housing 330 is configured to receive the second bearing 332, one output end of the flow dividing member 500 is communicated with the second bearing cavity 331, the other output end of the flow dividing member 500 is communicated with the second bearing cavity 331 through the first passage 110, the lubricant introduced from the flow divider 500 is divided into two paths by the flow divider 500, one of which is introduced into the first passage 110 of the first shaft 100, the other of which is introduced into the second bearing chamber 331, to facilitate lubrication of the second bearing 332 within the second bearing cavity 331, and, in addition, the rotor case 400 is provided with a second oil return port 420 communicated with the second bearing cavity 331, thereby facilitating the introduction of the lubricant in the second bearing cavity 331 into the rotor housing 400, so as to lubricate the engaged first and second rotors 210 and 310; in an embodiment, the first oil return port 410 and the second oil return port 420 may be symmetrically disposed on both sides of the rotor case 400, so as to lubricate the first rotor 210 and the second rotor 310 more sufficiently. In this embodiment, the flow divider 500 is a throttling plug, which not only can perform the flow dividing function, but also can control the flow rate of the lubricant.

In this embodiment, the flow dividing member 500 further includes a main oil inlet 520, a first oil outlet 530 and a second oil outlet 540, the main oil inlet 520, the first oil outlet 530 and the second oil outlet 540 are respectively communicated with the flow dividing chamber 510, the first oil outlet 530 and the second oil outlet 540 are two output ends of the flow dividing member 500, wherein the first oil outlet 530 is communicated with the first passage 110, and the second oil outlet 540 is communicated with the first bearing chamber 321.

In an embodiment, as shown in fig. 8 to 10, the first rotor 210 includes a plurality of first helical blades 212, a first tooth space 213 is formed between any two adjacent first helical blades 212, the second rotor 310 includes a plurality of second helical blades 311, a second tooth space 312 is formed between any two adjacent second helical blades 311, and a meshing space 430 for meshing the first helical blades 212 and the second helical blades 311 is provided between the first rotor 210 and the second rotor 310; the first oil return port 410 and the second oil return port 420 are disposed at positions of the rotor case 400 near the engagement space 430 to guide the lubricant introduced from the first oil return port 410 and the second oil return port 420 into the first tooth groove 213 and/or the second tooth groove 312.

It can be understood that the rotor housing 400 includes a first oil return port 410 and a second oil return port 420, and the first oil return port 410 and the second oil return port 420 are disposed at positions of the rotor housing 400 close to the meshing space 430, so that the lubricant in the first bearing cavity 321 directly flows into the first tooth groove 213 and/or the second tooth groove 312 through the first oil return port 410, and the lubricant in the second bearing cavity 331 directly flows into the first tooth groove 213 and/or the second tooth groove 312 through the second oil return port 420, thereby better lubricating the first rotor 210 and the second rotor 310.

In this embodiment, the meshing space 430 includes a first meshing subspace 431 close to one side of the first bearing housing 320 and a second meshing subspace 432 close to one side of the second bearing housing 331, the first oil return port 410 is disposed on the end surface of the rotor housing 400 facing the first bearing 322, the first oil return port 410 is located at a position where the rotor housing 400 is close to the first meshing subspace 431, the second oil return port 420 is disposed on the end surface of the rotor housing 400 facing the second bearing 332, and the second oil return port 420 is located at a position where the rotor housing 400 is close to the second meshing subspace 432, so that the lubricant entering the rotor housing 400 through the first oil return port 410 and the second oil return port 420 is uniformly distributed in the meshing space 430, and the lubrication efficiency is improved.

In one embodiment, the lubricant is a refrigeration oil that not only lubricates the rotor assembly, but also dissipates and cools heat.

Wherein, the lubricant has three oil paths in the rotor assembly, as shown in fig. 3, fig. 6, fig. 8, fig. 9 and fig. 10, which are respectively:

path 1, lubricant → the gross oil inlet 520 → the branching chamber 510 → the second bearing chamber 331 → the second oil return port 420 → the first tooth groove 213 and/or the second tooth groove 312.

Path 2, lubricant → the gross oil inlet 520 → the branching chamber 510 → the first passage 110 → the first bearing chamber 321 → the first oil return port 410 → the first tooth groove 213 and/or the second tooth groove 312.

Path 3, lubricant → the gross oil inlet 520 → the branch chamber 510 → the first passage 110 → the second passage 120 → the lubrication gap 130 → the flow guide passage 215 → the third oil reservoir groove 217 → the communication groove 216 → the first tooth groove 213.

In path 3, when the lubricant reaches the lubrication gap 130, the lubricant may also flow into the first oil reservoir 211 to be stored, and path 1, path 2, and path 3 may exist at the same time, path 1 may exist alone, or path 2 and path 3 may exist at the same time.

It should be noted that, of the two pairs of first and second rotors 210 and 310 engaged with each other, one pair of the first and second rotors 210 and 310 generates an axial force in a first direction during compression, and the other pair of the first and second rotors 210 and 310 generates an axial force in a second direction during compression, the first and second directions are parallel to the axial direction of the first shaft 100 and opposite to each other, and if the axial force in the first direction and the axial force in the second direction completely cancel each other, the bearing for supporting the first shaft 100 and the second shaft 300 may only include a radial bearing without providing a thrust bearing. 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 210 and the second rotor 310 with the rotor case 400 is also small, and the bearings carrying the first shaft 100 and the second shaft 300 may include only radial bearings without providing thrust bearings.

It can be understood that, due to the manufacturing process problem, the first rotor 210 and the second rotor 310 both have a certain tolerance range, which results in that the teeth of the two first rotors 210 with opposite threads are not completely symmetrical, and the teeth of the two second rotors 310 with opposite threads are not completely symmetrical, so that 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 210 and/or the second rotor 310 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 210 and the second rotor 310, 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 structure of the first rotor 210 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 one of the first rotors 210 may be changed, so that the axial force in the first direction or the second direction generated by the two first rotors 210 during the compression process is greater than the axial force in the second direction generated by the two second rotors 310 during the compression process. Thereby omitting the thrust bearings on the first and second shafts 100 and 300 corresponding to the axial force in the second direction.

The present invention also provides a compressor, which may be a screw compressor, such as an opposed screw compressor. It should be noted that the compressor related to the present invention is not limited to the screw compressor, and the compressor may be a scroll compressor.

The compressor includes the rotor assembly and a motor fixedly connected to the second shaft 300. The motor is used for driving the second rotor 310 to rotate. The screw compressor also comprises other common parts of the compressor, which are not described in detail herein.

In this embodiment, the screw compressor is a four-rotor screw compressor. The screw compressor includes two first rotors 210 and two second rotors 310. The two first rotors 210 and the two second rotors 310 of the four-rotor screw compressor are symmetrically arranged, which is equivalent to two screw compressors connected in parallel, so that the size of the screw compressors can be greatly reduced under the condition of the same air displacement. In addition, the two second rotors 310 as the male rotors and the two first rotors 210 as the female rotors of the screw compressor of the embodiment of the invention are jointed with the end surfaces close to each other, so that the screw compressor sucks air from the joint, and the air respectively flows to the rotors on the two sides to be compressed and discharged, and the whole screw compressor is more compact in structure.

The invention also provides an air conditioner, which comprises the compressor.

In summary, the rotor assembly includes a first shaft 100 and a rotating member 200 rotatably disposed on the first shaft 100, a lubrication gap 130 is formed between the rotating member 200 and the first shaft 100, wherein an oil storage groove communicated with the lubrication gap 130 is disposed on the rotating member 200, the rotor assembly of the present invention is configured with the oil storage groove communicated with the lubrication gap 130 on the rotating member 200, and the oil storage groove stores a certain amount of lubricant, so that at an initial working stage of the rotor assembly, components in the rotor assembly are lubricated by the lubricant directly in the oil storage groove, and a problem that the rotating member 200 is worn due to insufficient pressure of a lubrication pipeline system at the initial working stage and lubrication cannot be provided for the rotor assembly is avoided.

In summary, although the present application has been described with reference to the preferred embodiments, the above-described preferred embodiments are not intended to limit the present application, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present application, so that the scope of the present application shall be determined by the appended claims.

Claims (13)

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

a first shaft; and

the rotating part is rotatably arranged on the first shaft and comprises at least one first rotor capable of rotating around the first shaft, and a lubricating gap is formed between the rotating part and the first shaft;

wherein, be equipped with on the rotation piece with the oil storage tank of lubricated clearance intercommunication.

2. The rotor assembly of claim 1 wherein said oil reservoir comprises a first oil reservoir in communication with said lubrication gap, said first oil reservoir being disposed on an inner wall of said first rotor facing said first shaft.

3. The rotor assembly of claim 1 wherein the rotor further comprises a support member rotatably disposed on the first shaft between the first shaft and the first rotor, the support member fixedly connected to the first rotor, the lubrication gap between the support member and the first shaft;

wherein, the oil storage tank includes with the second oil storage tank of lubricated clearance intercommunication, the second oil storage tank set up in the supporting member is towards on the inner wall of primary shaft.

4. The rotor assembly of claim 1 wherein said oil reservoir comprises a third oil reservoir in communication with said lubrication gap, said first rotor comprising:

the third oil storage tank is arranged on the air suction end;

and the at least one communicating groove is formed in the air suction end and communicated with the third oil storage groove, and the communicating groove is used for guiding the lubricant in the third oil storage groove out of the air suction end.

5. The rotor assembly of claim 2 wherein the first oil reservoir is disposed annularly about the first axis on an inner wall of the first rotor facing the first axis.

6. The rotor assembly of claim 2 wherein said first rotor includes a plurality of first helical blades, said first oil reservoir being helically disposed about said first axis and located in a position corresponding to one of said first helical blades.

7. A rotor assembly as claimed in any one of claims 1 to 6, wherein a first passage is provided in the first shaft axially along the first shaft and at least a second passage communicates the first passage with the lubrication gap.

8. The rotor assembly of claim 7, further comprising:

a second shaft; and

and the second rotor is fixed on the second shaft, is meshed with the first rotor and is used for driving the first rotor to rotate relative to the first shaft.

9. The rotor assembly of claim 8 wherein said rotor assembly comprises two of said second rotors, said rotating member comprises two of said first rotors, said two of said first rotors being coaxially disposed on said first shaft, said two of said first rotors having opposite rotational directions, said two of said second rotors being symmetrically disposed on said second shaft, said two of said second rotors having opposite rotational directions.

10. A rotor assembly as claimed in any one of claims 8 to 9, further comprising:

the first bearing housing is arranged at one end of the second shaft, a first bearing cavity is formed between the first bearing housing and the second shaft, a first bearing arranged on the second shaft is accommodated in the first bearing cavity, and the first bearing cavity is communicated with the first channel; and

the first rotor and the second rotor are contained in the rotor shell, and a first oil return port communicated with the first bearing cavity is formed in the rotor shell.

11. The rotor assembly of claim 10, further comprising:

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

one output end of the flow dividing piece is communicated with the second bearing cavity, and the other output end of the flow dividing piece is communicated with the second bearing cavity through the first channel;

and a second oil return port communicated with the second bearing cavity is formed in the rotor shell.

12. A compressor, characterized in that it comprises a rotor assembly as claimed in any one of claims 1 to 11.

13. An air conditioner characterized in that it comprises a compressor according to claim 12.

Images