Rotor assembly, compressor and air conditioner

Abstract

A rotor assembly, a compressor and an air conditioner, the rotor assembly includes a first shaft and a rotating member rotatably disposed on the first shaft, a lubrication gap is formed between the rotating member and the first shaft, wherein, an oil storage groove communicating with the lubrication gap is provided on the rotating member. The rotor assembly of the present invention is provided with an oil storage groove communicating with the lubrication gap on the rotating member, and a certain amount of lubricant is stored through the oil storage groove, which is convenient for lubricating the components in the rotor assembly directly with the lubricant in the oil storage groove during the initial working stage of the rotor assembly, avoiding the problem of wear of the rotating member caused by the insufficient pressure of the lubrication pipeline system to provide lubrication for the rotor assembly during the initial working stage.

Description

Technical Field

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

[0002] During the rotation of the rotor of a rotor assembly around a rotating shaft through structures such as sliding bearings or the meshing transmission with other rotors, in order to avoid rigid contact and wear between components within the rotor assembly such as meshing rotors or the rotor and the rotating shaft, lubrication and cooling are required through a lubricant. Currently, in an actual lubrication pipeline system, often due to reasons such as insufficient pipeline pressure during initial stages such as startup, there is no lubricant for lubrication of the rotor assembly during the initial working stage. Over time, this easily causes wear of the components within the rotor assembly and reduces the service life of the rotor assembly. Summary of the Invention

[0003] Embodiments of the present invention provide a rotor assembly, a compressor, and an air conditioner to solve the problem that in the initial startup stage of an existing rotor assembly, due to insufficient pressure in the lubrication pipeline system, timely lubrication cannot be achieved, resulting in wear of the internal components of the rotor assembly.

[0004] To solve the above problems, the technical solutions provided by the present invention are as follows:

[0005] In a first aspect of an embodiment of the present invention, a rotor assembly is provided. The rotor assembly includes:

[0006] A first shaft; and

[0007] A rotating member rotatably disposed on the first shaft and including at least one first rotor rotatable around the first shaft. A lubrication gap is formed between the rotating member and the first shaft;

[0008] Wherein, an oil storage groove communicating with the lubrication gap is provided on the rotating member.

[0009] In some embodiments, the oil storage groove includes a first oil storage groove communicating with the lubrication gap, and the first oil storage groove is disposed on the inner wall of the first rotor facing the first shaft.

[0010] In some embodiments, the rotating member further includes a support member rotatably disposed on the first shaft and located between the first shaft and the first rotor. The support member is fixedly connected to the first rotor, and the lubrication gap is located between the support member and the first shaft;

[0011] Wherein, the oil storage groove includes a second oil storage groove communicating with the lubrication gap, and the second oil storage groove is disposed on the inner wall of the support member facing the first shaft.

[0012] In some embodiments, the oil storage tank includes a third oil storage tank communicating with the lubrication gap, and the first rotor includes:

[0013] An air inlet end, on which the third oil storage tank is arranged;

[0014] At least one communication groove, arranged on the air inlet end and communicating with the third oil storage tank, and the communication groove is used to lead out the lubricant in the third oil storage tank from the air inlet end.

[0015] In some embodiments, the first oil storage tank is annularly arranged around the first shaft on the inner wall of the first rotor facing the first shaft.

[0016] In some embodiments, the first rotor includes a plurality of first spiral blades, and the first oil storage tank is spirally arranged around the first shaft and is located at a position corresponding to one of the first spiral blades.

[0017] In some embodiments, a first channel arranged along the axial direction of the first shaft and at least one second channel communicating the first channel with the lubrication gap are arranged in the first shaft.

[0018] In some embodiments, the rotor assembly further includes:

[0019] A second shaft; and

[0020] At least one second rotor fixed on the second shaft, the second rotor meshes with the first rotor and is used to drive the first rotor to rotate relative to the first shaft.

[0021] In some embodiments, the rotor assembly includes two of the second rotors, the rotating member includes two of the 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.

[0022] In some embodiments, the rotor assembly further includes:

[0023] A first bearing housing, 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 received in the first bearing cavity, and the first bearing cavity communicates with the first channel; and

[0024] A rotor housing, the first rotor and the second rotor are received in the rotor housing, and a first oil return port communicating with the first bearing cavity is arranged on the rotor housing.

[0025] In some embodiments, the rotor assembly further includes:

[0026] A second bearing housing is disposed at one end of the second shaft away from the first bearing housing. There is a second bearing cavity between the second bearing housing and the second shaft, and a second bearing disposed on the second shaft is received in the second bearing cavity; and

[0027] A flow dividing member, one output end of the flow dividing member is communicated with the second bearing cavity, and the other output end of the flow dividing member is communicated with the second bearing cavity through the first channel;

[0028] A second oil return port communicated with the second bearing cavity is provided on the rotor housing.

[0029] In a second aspect of the embodiments of the present invention, a compressor is provided, and the compressor includes the rotor assembly provided in the first aspect of the present invention.

[0030] In a third aspect of the embodiments of the present invention, an air conditioner is provided, and the air conditioner includes the compressor provided in the second aspect of the present invention.

[0031] Based on the technical solution provided by the present invention, the rotor assembly includes a first shaft and a rotating member rotatably disposed on the first shaft. A lubricating gap is formed between the rotating member and the first shaft. Wherein, an oil storage groove communicated with the lubricating gap is provided on the rotating member. In the rotor assembly of the present invention, an oil storage groove communicated with the lubricating gap is provided on the rotating member. A certain amount of lubricant is stored through the oil storage groove, which is convenient for directly lubricating the components in the rotor assembly through the lubricant in the oil storage groove during the initial working stage of the rotor assembly, and avoids the problem of wear of the rotating member caused by insufficient pressure of the lubrication pipeline system during the initial working stage and inability to provide lubrication for the rotor assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The following combines the drawings and details the specific embodiments of the present application, and the technical solutions and other beneficial effects of the present application will be obvious.

[0033] Figure 1 It is a first structural schematic diagram of the rotor assembly provided by the embodiment of the present application;

[0034] Figure 2 It is a second structural schematic diagram of the rotor assembly provided by the embodiment of the present application;

[0035] Figure 3 It is a third structural schematic diagram of the rotor assembly provided by the embodiment of the present application;

[0036] Figure 4 It is a cross-sectional structural schematic diagram of the first rotor at the position of the first oil storage groove provided by the embodiment of the present application;

[0037] Figure 5Schematic diagram of the half-section structure of the first rotor provided by the embodiment of the present application;

[0038] Figure 6 Schematic diagram of the structure of the suction end of the first rotor provided by the embodiment of the present application;

[0039] Figure 7 Schematic diagram of the three-dimensional structure of the bushing provided by the embodiment of the present application;

[0040] Figure 8 Schematic diagram of the fourth structure of the rotor assembly provided by the embodiment of the present application;

[0041] Figure 9 Schematic diagram of the structure of the first oil return port, the first rotor and the second rotor in the rotor assembly provided by the embodiment of the present application;

[0042] Figure 10 Schematic diagram of the structure of the second oil return port, the first rotor and the second rotor in the rotor assembly provided by the embodiment of the present application.

[0043] Each reference numeral represents respectively:

[0044] 100, first shaft; 110, first channel; 120, second channel; 130, lubrication gap;

[0045] 200, rotating member; 210, first rotor; 211, first oil storage tank; 212, first spiral blade; 213, first tooth groove; 214, suction end; 215, diversion channel; 216, communication groove; 217, third oil storage tank;

[0046] 220, support member; 221, bushing; 2211, communication hole; 2212, guide groove; 222, oil guide gap; 223, oil guide hole:

[0047] 300, second shaft; 310, second rotor; 311, second spiral blade; 312, second tooth groove; 320, first bearing housing; 321, first bearing cavity; 322, first bearing; 330, second bearing housing; 331, second bearing cavity; 332, second bearing;

[0048] 400, rotor housing; 410, first oil return port; 420, second oil return port; 430, meshing space; 431, first meshing sub-space; 432, second meshing sub-space;

[0049] 500, shunt member; 510, shunt cavity; 520, total oil inlet; 530, first oil outlet; 540, second oil outlet. Detailed implementation manners

[0050] The specific structural and functional details disclosed herein are merely representative and are for the purpose of describing exemplary embodiments of the present application. However, the present application can be embodied in many alternative forms and should not be construed as limited to the embodiments set forth herein.

[0051] In the description of the present application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, unless otherwise specified, the meaning of "a plurality" is two or more. Additionally, the term "comprising" and any variations thereof are intended to cover non-exclusive inclusion.

[0052] In the description of the present application, it should be noted that, unless otherwise clearly specified and defined, the terms "mounted", "connected" and "coupled" should be construed broadly. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be a direct connection or an indirect connection through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0053] The present application will be further described below in conjunction with the accompanying drawings and embodiments.

[0054] As Figures 1 to 2 shown, a rotor assembly provided by an embodiment of the present application, the rotor assembly includes a first shaft 100 and a rotating member 200 rotatably disposed on the first shaft 100. The rotating member 200 is rotatably disposed on the first shaft 100 and includes at least one first rotor 210 rotatable about 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 communicating with the lubrication gap 130 is provided on the rotating member 200.

[0055] It can be understood that during the rotation of the rotor of the rotor assembly around the rotating shaft through structures such as sliding bearings or the meshing transmission with other rotors, in order to avoid rigid contact and wear between components such as the meshing rotors or the rotor and the rotating shaft within the rotor assembly, lubrication and cooling are required through lubricants. Currently, in the actual lubrication pipeline system, often in the initial stage such as startup, due to reasons such as insufficient pipeline pressure, there is no lubricant for lubricating the rotor assembly in the initial working stage. Over time, it is easy to cause wear of the components within the rotor assembly and reduce the service life of the rotor assembly. In this embodiment, an oil storage groove communicating with the lubrication gap 130 is provided on the rotating member 200. By storing a certain amount of lubricant in the oil storage groove, it is convenient to directly lubricate the components within the rotor assembly with the lubricant in the oil storage groove during the initial working stage of the rotor assembly, avoiding the problem of wear of the rotating member 200 caused by the inability of the lubrication pipeline system to provide lubrication for the rotor assembly due to insufficient pressure in the initial working stage. In one embodiment, as Figures 2 to 3 shown, the oil storage groove includes a first oil storage groove 211 communicating with the lubrication gap. The first oil storage groove 211 is provided on the inner wall of the first rotor 210 facing the first shaft 100; it can be understood that by storing a certain amount of lubricant in the first oil storage groove 211, it is convenient to directly lubricate the relatively rotating first shaft 100 and the rotating member 200 with the lubricant in the oil storage groove during the initial working stage of the rotor assembly, avoiding the problem of wear of the first shaft 100 and the rotating member 200 caused by the inability of the lubrication pipeline system to provide lubrication for the rotor assembly due to insufficient pressure in the initial working stage.

[0056] It should be noted that the rotating member 200 may only include the first rotor 210. The first rotor 210 may be directly sleeved on the first shaft 100. 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 is equivalent to the inner ring of this sliding bearing structure, and the first rotor 210 can rotate on the first shaft 100 as the outer ring of this sliding bearing structure. Moreover, in order to improve the friction properties between the first rotor 210 and the first shaft 100, an anti-wear material such as babbit alloy can be provided on the inner side of the first rotor 210 or on the first shaft 100, thereby increasing the service life of the rotor assembly. In one embodiment, as Figures 2 to 3As shown, the rotating member 200 further includes a support member 220. The support member 220 is rotatably disposed on the first shaft 100 and located between the first shaft 100 and the first rotor 210. The support member 220 is fixedly connected to the first rotor 210. The lubrication gap 130 is located between the support member 220 and the first shaft 100. Among them, the oil storage tank includes a second oil storage tank (not shown in the figure) communicating with the lubrication gap 130. The second oil storage tank is disposed on the inner wall of the support member 220 facing the first shaft 100. It can be understood that the rotating member 200 may further include a support member 220. Rotatably disposing the support member 220 on the first shaft 100 and located between the first shaft 100 and the first rotor 210 avoids direct contact between the first rotor 210 and the first shaft 100, thereby causing wear. At this time, the lubrication gap 130 is located between the support 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 the inner ring of the sliding bearing structure, and the support member 220 can rotate on the first shaft 100 as the outer ring of the sliding bearing structure. Obviously, by storing a certain amount of lubricant in the second oil storage tank, it is convenient to directly lubricate the relatively rotating first shaft 100 and the rotating member 200 with the lubricant in the oil storage tank during the initial working stage of the rotor assembly, avoiding the problem of wear of the first shaft 100 and the rotating member 200 caused by insufficient pressure in the lubrication pipeline system during the initial working stage and being unable to provide lubrication for the rotor assembly; specifically, the support member 220 can be made of wear-resistant material, and the support member 220 is fixedly connected to the first rotor 210. During the rotation of the support member 220 relative to the first shaft 100, the support member 220 can rotate around the first shaft 100 together with the first rotor 210. In this embodiment, a tight fit can be used for the fixed connection between the first rotor 210 and the support member 220. Specifically, an interference fit can be used between the first rotor 210 and the support member 220.

[0057] In one embodiment, as Figure 2As shown, the structures of the first oil storage tank 211 and the second oil storage tank can be adopted simultaneously. At this time, the rotating member 200 includes a support member 220 and a first rotor 210 sleeved outside the support member 220 and fixedly connected to the support member 220. An oil guiding hole 223 for communicating the first oil storage tank 211 and the lubrication gap 130 is provided on the support member 220. It can be understood that the oil guiding hole 223 is directly opened on the support member 220 to communicate the first oil storage tank 211 and the lubrication gap 130. In this embodiment, the position of the oil guiding hole 223 can be opened at any position on the support member 220 to facilitate the arrangement of the positions of the first oil storage tank 211 and the lubrication gap 130, and specifically, it can be opened on the support member 220 according to the needs of the first oil storage tank 211 and the lubrication gap 130. In this embodiment, when the support member 220 at least includes a bushing 221, the oil guiding hole 223 can be directly opened on the bushing 221.

[0058] Continuing from the above, in an embodiment, as Figures 2 to 3 shown, the support member 220 includes at least two bushings 221. The bushings 221 are rotatable relative to the first shaft 100. One first rotor 210 is correspondingly sleeved on at least two bushings 221. An oil guiding gap 222 for communicating the first oil storage tank 211 and the lubrication gap 130 is formed between two adjacent bushings 221.

[0059] It can be understood that an oil guiding gap 222 for communicating the first oil storage tank 211 and the lubrication gap 130 is formed between the two bushings 221. That is, according to the specific structure of the support member 220, by using the positional relationship between the two bushings 221 coaxially arranged on the first shaft 100, the oil guiding gap 222 is directly formed between the two bushings 221 to facilitate the introduction of the lubricant in the first oil storage tank 211 into the oil guiding gap 222 for lubrication. Obviously, compared with the structure of directly providing the oil guiding hole 223 on the support member 220, it not only avoids the problems of additional manufacturing of the oil guiding hole 223 on the support member 220, resulting in increased costs and even possible influence on the mechanical properties of the support member 220, but also by making full use of the positional structure between the two bushings 221, the oil guiding gap 222 is formed between the two bushings 221 without processing the bushings 221, ensuring the universality of standard parts such as the bushings 221.

[0060] In an embodiment, as Figure 4As shown, the first oil storage tank 211 is arranged around the first shaft 100 in a ring shape on one side of the first rotor 210 close to the first shaft 100; it can be understood that in the embodiment where the first oil storage tank 211 is arranged around the first shaft 100 in a ring shape, and an oil guiding hole 223 is provided on the support member 220 or an oil guiding gap 222 is formed between the two shaft sleeves 221 of the support member 220, the position of the ring-shaped first oil storage tank 211 at least partially corresponds to the position of the oil guiding hole 223 or the oil guiding gap 222, so that the first oil storage tank 211 is communicated with the lubricating gap 130 through the oil guiding hole 223 or the oil guiding gap 222. In this embodiment, when the first oil storage tank 211 is communicated with the lubricating gap 130 through the oil guiding hole 223, the oil guiding hole 223 can be arranged according to the position of the first oil storage tank 211, so as to increase the conduction area between the oil guiding hole 223 and the first oil storage tank 211 and improve the oil storage efficiency of the first oil storage tank 211 and the oil guiding efficiency for the lubricating gap 130; when the first oil storage tank 211 is communicated with the lubricating gap 130 through the oil guiding gap 222, the position of the ring-shaped first oil storage tank 211 can exactly correspond to the oil guiding gap 222, so as to maximize the conduction area between the oil guiding gap 222 and the first oil storage tank 211 and also improve the oil storage efficiency of the first oil storage tank 211 and the oil guiding efficiency for the lubricating gap 130.

[0061] In one embodiment, as Figure 5 shown, the first rotor 210 includes a plurality of first spiral blades 212, and the first oil storage tank 211 is arranged around the first shaft 100 in a spiral shape and is located at a position corresponding to one of the first spiral blades 212. It can be understood that in the embodiment where the first oil storage tank 211 is arranged around the first shaft 100 in a spiral shape, and an oil guiding hole 223 is provided on the support member 220 or an oil guiding gap 222 is formed between the two shaft sleeves 221 of the support member 220, the position of the first oil storage tank 211 at least partially corresponds to the position of the oil guiding hole 223 or the oil guiding gap 222 to ensure that the first oil storage tank 211 is communicated with the oil guiding hole 223 or the oil guiding gap 222. In this embodiment, the spiral-shaped first oil storage tank 211 can be at a position corresponding to one of the first spiral blades 212, that is, the first oil storage tank 211 is arranged at the position where the thickness of the first rotor 210 is the largest, which can well reduce the influence of the opening of the first oil storage tank 211 on the mechanical properties of the first rotor 210.

[0062] Obviously, providing an oil guiding hole 223 on the support member 220 has a similar effect to forming an oil guiding gap 222 between the two bushings 221 of the support member 220. For ease of understanding, in the subsequent embodiments of this application, the example of forming an oil guiding gap 222 between the two bushings 221 of the support member 220 will be used for illustration.

[0063] In one embodiment, as Figure 2 , Figure 3 and Figure 6 shown, the oil storage tank includes a third oil storage tank 217 communicating with the lubrication gap 130. The first rotor 210 includes a suction end 214 and at least one communication groove 216. Both the communication groove 216 and the third oil storage tank 217 are provided on the suction end 214. The communication groove 216 communicates with the third oil storage tank 217. The communication groove 216 is used to export the lubricant in the third oil storage tank 217 from the suction end 214. It can be understood that the first rotor 210 may further include a diversion channel 215 provided on the suction end 214. The lubrication gap 130 communicates with the third oil storage tank 217 through the diversion channel 215. The diversion channel 215 is used to introduce the lubricant in the lubrication gap 130 into the third oil storage tank 217. Through the settings of the diversion channel 215, the communication groove 216 and the third oil storage tank 217, the lubricant in the lubrication gap 130 can be exported from the diversion channel 215 to the third oil storage tank 217. Moreover, the lubricant exported to the third oil storage tank 217 can further be introduced into the tooth grooves of the first rotor 210 through the communication groove 216, and then discharged from the exhaust end of the first rotor 210 along with the rotation of the first rotor 210. Among them, the exhaust end and the suction end 214 are respectively located at both ends of the first rotor 210. Obviously, by storing a certain amount of lubricant in the third oil storage tank 217, it is convenient to directly lubricate the tooth grooves of the first rotor 210 with the lubricant in the oil storage tank during the initial working stage of the rotor assembly, avoiding the problem of wear of the first rotor 210 caused by insufficient pressure in the lubrication pipeline system during the initial working stage and being unable to provide lubrication for the rotor assembly.

[0064] Continuing from the above, specifically, as Figure 6As shown, the first rotor 210 includes a plurality of first spiral blades 212, and a first tooth groove 213 is formed between any two adjacent first spiral blades 212. The suction end 214 is provided with at least one connecting groove 216 and at least one third oil storage groove 217 connected to the connecting groove 216. The third oil storage groove 217 is connected to the first tooth groove 213 through the connecting groove 216. The guide channel 215 can be connected to the third oil storage groove 217, so that the lubricant discharged from the guide channel 215 is sequentially introduced into the first tooth groove 213 through the third oil storage groove 217 and the connecting groove 216, thereby realizing lubrication of the first rotor 210.

[0065] It should be noted that if Figure 7 As shown, the sleeve 221 is provided with a connecting hole 2211, and the connecting hole 2211 connects the inner surface and the outer surface of the sleeve 221, so that the lubricant can lubricate the inner surface and the outer surface of the sleeve 221. The outer wall of the sleeve 221 is also provided with a guide groove 2212 connected to the connecting hole 2211, and the guide groove 2212 can accelerate the flow of lubricant between the first rotor 210 and the first shaft 100, so that the lubricant can flow more easily to the connecting groove 216 of the first rotor 210. In one embodiment, as Figures 1 to 3 As shown, the first shaft 100 is provided with a first channel 110 arranged along the axial direction of the first shaft 100 and at least one second channel 120 connecting the first channel 110 and the lubrication gap 130. It can be understood that the first channel 110 and at least one second channel 120 are used to introduce the lubricant in the external lubrication pipeline into the lubrication gap 130 and the first oil storage tank 211, wherein the first channel 110 can be connected to the external lubrication pipeline, so that the lubricant is introduced into the lubrication gap 130, the oil guide gap 222 and the first oil storage tank 211 through the second channel 120. In this embodiment, the first channel 110 can be arranged along the axial direction of the first shaft 100, and a plurality of second channels 120 can be arranged in the first shaft 100, wherein the position of at least one of the second channels 120 can correspond to the position of the oil guiding gap 222 to increase the conduction area between the second channel 120 and the oil guiding gap 222, and at the same time, a plurality of second channels 120 can also be respectively arranged corresponding to different positions of the oil guiding gap 222, so that when the lubricant is introduced through the second channel 120, the oil storage function of the first oil storage tank 211 can be well realized.

[0066] Continuing from the above, a plurality of second channels 120 are spaced apart on the first shaft 100. The plurality of second channels 120 can allow the lubricant in the first channel 110 to enter the lubrication gap 130 faster. Moreover, the plurality of second channels 120 are spaced apart on the first shaft 100. Through the plurality of second channels 120, the lubricant can enter each position of the lubrication gap 130 more evenly, lubricating each position of the first shaft 100 more evenly. In addition, the aperture of the second channel 120 can gradually increase along the liquid inlet direction, that is, the farther away from the liquid inlet end of the first channel 110, the larger the aperture of the second channel 120. Because the lubricant in the first channel 110 is farther away from the liquid inlet end, the corresponding hydraulic pressure is smaller, so that the lubricant entering the gap can be more balanced.

[0067] In one embodiment, as Figure 8 shown, 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 meshes with the first rotor 210 and is used to drive the first rotor 210 to rotate relative to the first shaft 100. The first rotor 210 includes a plurality of first helical blades 212, and a first tooth groove 213 is formed between any two adjacent first helical blades 212. The second rotor 310 includes a plurality of second helical blades 311, and a second tooth groove 312 is formed between any two adjacent second helical blades 311. 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 in the initial working stage of the rotor assembly, when the first rotor 210 and the second rotor 310 start meshing transmission, a certain amount of lubricant can be stored in the third oil storage tank 217, and the tooth grooves of the first rotor 210 can be lubricated directly through the lubricant in the oil storage tank, that is, the meshing transmission of the first rotor 210 and the second rotor 310 is lubricated, avoiding the problem of wear of the first rotor 210 and the second rotor 310 caused by insufficient pressure in the lubrication pipeline system in the initial working stage and being unable to provide lubrication for the rotor assembly.

[0068] In one embodiment, the first rotor 210 can be made of self-lubricating non-metallic material, and the first shaft 100 can be made of cemented carbide material. Of course, it can also be that the first rotor 210 is made of cemented carbide material and the first shaft 100 is made of self-lubricating non-metallic material.

[0069] 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 hard alloy steel and the second rotor 310 is made of a self-lubricating non-metallic material, the meshing motion between the first rotor 210 and the second rotor 310 is between a metal and a non-metallic material, which is beneficial to increasing the smoothness of transmission and reducing vibration and noise during the operation of the compressor.

[0070] In one embodiment, as Figure 8 shown, the rotor assembly includes two of the second rotors 310, the rotating member 200 includes two of the first rotors 210, the two first rotors 210 are coaxially arranged on the first shaft 100, the two second rotors 310 are coaxially arranged 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, symmetrically arranged on the first shaft 100, the rotation directions of the two first rotors 210 are opposite, each first rotor 210 meshes with a second rotor 310, and the end faces of the two first rotors 210 close to each other are joined, that is, the two 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 gas flows to the two first rotors 210 on both sides for compression and exhaust respectively, thus making the structure of the whole compressor more compact; and, the first oil storage grooves 211 are provided on both of the first rotors 210, so as to facilitate lubricating the relatively rotating first shaft 100 and the support member 220 directly through the lubricant in their respective first oil storage grooves 211 during the initial working stage of the rotor assembly, avoiding the problem of wear of the first shaft 100 and the support member 220 caused by insufficient pressure in the lubrication pipeline system to provide lubrication for the rotor assembly during the initial working stage.

[0071] It should be noted that, as Figure 8 shown, among the two pairs of the first rotors 210 and the second rotors 310 that mesh with each other, one pair of the first rotors 210 and the second rotors 310 generate axial forces in a first direction during the compression process, and the other pair of the first rotors 210 and the second rotors 310 generate axial forces in a second direction during the compression process. The first direction and the second direction are parallel to the axial direction of the first shaft 100, and the first direction and the second direction are opposite. If the axial forces in the first direction and the axial forces in the second direction are completely offset, the problem of excessive axial force can be improved.

[0072] In one embodiment, as Figures 8 to 10As shown, 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. There is a first bearing cavity 321 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. The first bearing cavity 321 communicates with the first passage 110. The first rotor 210 and the second rotor 310 are received in the rotor housing 400. The rotor housing 400 is provided with a first oil return port 410 communicating with the first bearing cavity 321.

[0073] It can be understood that the first bearing housing 320 is used to receive the first rotating shaft, the rotor housing 400 is used to receive the first rotor 210 and the second rotor 310. By communicating the first bearing cavity 321 with the first passage 110 on the first shaft 100, the lubricant in the first passage 110 can be introduced into the first bearing cavity 321, so as to realize the lubrication of the first bearing 322. Moreover, the rotor housing 400 is also provided with a first oil return port 410 communicating with the first bearing cavity 321, so as to facilitate the introduction of the lubricant in the first bearing cavity 321 into the rotor housing 400, in order to lubricate the engaged first rotor 210 and second rotor 310. It should be noted that before the lubricant is introduced from the first passage 110 into the first bearing cavity 321, the lubricant in the first passage 110 can not only be directly introduced into the second oil storage tank, but also be introduced into the lubrication gap 130 and the first oil storage tank 211 through the second passage 120.

[0074] In one embodiment, as Figures 8 to 10 shown, the rotor assembly further includes a second bearing housing 330 and a shunt member 500. The second bearing housing 330 is disposed at the end of the second shaft 300 away from the first bearing housing 320. There is a second bearing cavity 331 between the second bearing housing 330 and the second shaft 300. A second bearing 332 disposed on the second shaft 300 is received in the second bearing cavity 331. One output end of the shunt member 500 communicates with the second bearing cavity 331, and the other output end of the shunt member 500 communicates with the second bearing cavity 331 through the first passage 110. The rotor housing 400 is provided with a second oil return port 420 communicating with the second bearing cavity 331.

[0075] It can be understood that the second bearing housing 330 is used to accommodate the second bearing 332. One output end of the flow divider 500 communicates with the second bearing cavity 331, and the other output end of the flow divider 500 communicates with the second bearing cavity 331 through the first channel 110. Through the flow divider 500, the lubricant introduced from the flow divider 500 is divided into two paths. One path is introduced into the first channel 110 of the first shaft 100, and the other path is introduced into the second bearing cavity 331 to facilitate lubricating the second bearing 332 in the second bearing cavity 331. In addition, a second oil return port 420 communicating with the second bearing cavity 331 is provided on the rotor housing 400, so as to facilitate introducing the lubricant in the second bearing cavity 331 into the rotor housing 400 to lubricate the engaged first rotor 210 and second rotor 310. In one embodiment, the first oil return port 410 and the second oil return port 420 can be symmetrically arranged on both sides of the rotor housing 400 to lubricate the first rotor 210 and the second rotor 310 more fully. In this embodiment, the flow divider 500 is a throttle plug, which can not only play a role in flow division but also control the flow rate of the lubricant.

[0076] In this embodiment, the flow divider 500 further includes a total oil inlet 520, a first oil outlet 530, and a second oil outlet 540. The total oil inlet 520, the first oil outlet 530, and the second oil outlet 540 communicate with the flow division cavity 510 respectively. The first oil outlet 530 and the second oil outlet 540 are the two output ends of the flow divider 500. Among them, the first oil outlet 530 communicates with the first channel 110, and the second oil outlet 540 communicates with the first bearing cavity 321.

[0077] In one embodiment, as Figures 8 to 10 shown, the first rotor 210 includes a plurality of first spiral blades 212, and a first tooth groove 213 is formed between any two adjacent first spiral blades 212. The second rotor 310 includes a plurality of second spiral blades 311, and a second tooth groove 312 is formed between any two adjacent second spiral blades 311. A meshing space 430 for meshing the first spiral blades 212 and the second spiral 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 arranged at positions of the rotor housing 400 close to the meshing space 430 to introduce the lubricant entering 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.

[0078] It can be understood that the rotor housing 400 includes a first oil return port 410 and a second oil return port 420. By arranging the first oil return port 410 and the second oil return port 420 at positions of the rotor housing 400 close to the meshing space 430, it is convenient for the lubricant in the first bearing cavity 321 to directly flow into the first tooth groove 213 and / or the second tooth groove 312 through the first oil return port 410, and it is also convenient for the lubricant in the second bearing cavity 331 to directly flow into the first tooth groove 213 and / or the second tooth groove 312 through the second oil return port 420, so as to better lubricate the first rotor 210 and the second rotor 310.

[0079] In this embodiment, the meshing space 430 includes a first meshing sub-space 431 close to one side of the first bearing housing 320 and a second meshing sub-space 432 close to one side of the second bearing housing 331. The first oil return port 410 is arranged on the end face of the rotor housing 400 facing the first bearing 322, and the first oil return port 410 is located at a position of the rotor housing 400 close to the first meshing sub-space 431. The second oil return port 420 is arranged on the end face of the rotor housing 400 facing the second bearing 332, and the second oil return port 420 is located at a position of the rotor housing 400 close to the second meshing sub-space 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 evenly distributed in the meshing space 430, improving the lubrication efficiency.

[0080] In one embodiment, the lubricant is a refrigerant oil, and the refrigerant oil can not only lubricate the rotor assembly, but also dissipate heat and refrigerate.

[0081] Among them, the lubricant has three oil path routes in the rotor assembly, as Figure 3 、 Figure 6 、 Figure 8 、 Figure 9 and Figure 10 shown, which are respectively:

[0082] Path 1: Lubricant → the total oil inlet 520 → the shunt cavity 510 → the second bearing cavity 331 → the second oil return port 420 → the first tooth groove 213 and / or the second tooth groove 312.

[0083] Path 2: Lubricant → the total oil inlet 520 → the shunt cavity 510 → the first channel 110 → the first bearing cavity 321 → the first oil return port 410 → the first tooth groove 213 and / or the second tooth groove 312.

[0084] Path 3: Lubricant → the total oil inlet 520 → the flow - dividing cavity 510 → the first channel 110 → the second channel 120 → the lubrication gap 130 → the diversion channel 215 → the third oil storage tank 217 → the communication groove 216 → the first tooth groove 213.

[0085] Among them, in Path 3, when the lubricant reaches the lubrication gap 130, it can also flow into the first oil storage tank 211 for oil storage. Path 1, Path 2, and Path 3 can exist simultaneously, or Path 1 can exist alone, or Path 2 and Path 3 can exist simultaneously.

[0086] It should be noted that among the two pairs of the first rotor 210 and the second rotor 310 that mesh with each other, one pair of the first rotor 210 and the second rotor 310 generates an axial force in the first direction during the compression process, and the other pair of the first rotor 210 and the second rotor 310 generates an axial force in the second direction during the compression process. The first direction and the second direction are parallel to the axial direction of the first shaft 100, 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 shaft 100 and the second shaft 300 can only include radial bearings without thrust bearings. If the remaining axial force after partial offset of the axial force in the first direction and the axial force in the second direction is very small, the impact of the collision between the first rotor 210 and the second rotor 310 and the rotor housing 400 is also very small, and the bearings supporting the first shaft 100 and the second shaft 300 can only include radial bearings without thrust bearings.

[0087] It can be understood that due to manufacturing process issues, the first rotor 210 and the second rotor 310 both have a certain tolerance range, resulting in the tooth parts of the two first rotors 210 with opposite threads not being completely symmetrical, and the tooth parts of the two second rotors 310 with opposite threads not being completely symmetrical either. As a result, the direction of the axial force after partial cancellation of the axial force in the first direction and the axial force in the second direction is uncertain, and thrust bearings in both directions need to be provided. In this embodiment, the structures of the first rotor 210 and / or the second rotor 310 can be changed so that within the tolerance range of the first rotor 210 and the second rotor 310, the axial force in one direction is constantly greater than the axial force in the other direction, thereby making the resultant force of the axial force generated after the first rotor and the second rotor mesh and rotate be in a fixed direction. Therefore, only one-direction thrust bearings can be provided, and one-direction thrust bearings can be omitted. For example, by changing the structure of the first rotor 210, the axial force in the first direction can be made greater than the axial force in the second direction. Specifically, at least one of the length, diameter, tooth density, tooth thickness, and end face profile of one of the first rotors 210 can 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. Thus, the thrust bearings corresponding to the axial force in the second direction on the first shaft 100 and the second shaft 300 can be omitted.

[0088] The present invention also provides a compressor, and the compressor can be a screw compressor, such as an opposed screw compressor. It should be noted that the compressor involved in the present invention is not limited to a screw compressor, and the compressor can also be a scroll compressor, for example.

[0089] The compressor includes the rotor assembly and a motor fixedly connected to the second shaft 300. The motor is used to drive the second rotor 310 to rotate. The screw compressor also includes other common components of a compressor, which will not be elaborated here one by one.

[0090] 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 symmetrical arrangement of the two first rotors 210 and the two second rotors 310 of the four-rotor screw compressor is equivalent to the parallel connection of two screw compressors. Then, in the case of the same displacement, the size of the screw compressor can be greatly reduced. Moreover, the end faces of the two second rotors 310 as male rotors and the two first rotors 210 as female rotors of the screw compressor according to the embodiment of the present invention are joined together, enabling the screw compressor to suck air from the joint, and the gas flows to the rotors on both sides for compression and exhaust respectively, making the structure of the entire screw compressor more compact.

[0091] The present invention also provides an air conditioner, and the air conditioner includes the compressor as described above.

[0092] 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. Among them, an oil storage groove communicating with the lubrication gap 130 is provided on the rotating member 200. The rotor assembly of the present invention is provided with an oil storage groove communicating with the lubrication gap 130 on the rotating member 200. By storing a certain amount of lubricant in the oil storage groove, it is convenient to lubricate the components in the rotor assembly directly with the lubricant in the oil storage groove during the initial working stage of the rotor assembly, avoiding the problem of wear of the rotating member 200 caused by insufficient pressure in the lubrication pipeline system during the initial working stage and being unable to provide lubrication for the rotor assembly.

[0093] In summary, although the present application has been disclosed above with preferred embodiments, the above preferred embodiments are not intended to limit the present application. Those of ordinary skill in the art can make various changes and modifications without departing from the spirit and scope of the present application. Therefore, the protection scope of the present application is subject to the scope defined by the claims.

Claims

1. A rotor assembly, characterized in that, the rotor assembly comprises: a first shaft; and a rotating member rotatably disposed on the first shaft and including at least one first rotor rotatable about the first shaft, a lubrication gap being formed between the rotating member and the first shaft; wherein, an oil storage groove communicating with the lubrication gap is provided on the rotating member; the oil storage groove includes a third oil storage groove communicating with the lubrication gap, and the first rotor includes: a suction end, the third oil storage groove being provided on the suction end; at least one communication groove provided on the suction end and communicating with the third oil storage groove, the communication groove being configured to lead out the lubricant in the third oil storage groove from the suction end.

2. The rotor assembly according to claim 1, characterized in that, the oil storage groove includes a first oil storage groove communicating with the lubrication gap, the first oil storage groove being provided on the inner wall of the first rotor facing the first shaft.

3. The rotor assembly according to claim 1, characterized in that, the rotating member further includes a support member rotatably disposed on the first shaft and located between the first shaft and the first rotor, the support member being fixedly connected to the first rotor, the lubrication gap being located between the support member and the first shaft; wherein, the oil storage groove includes a second oil storage groove communicating with the lubrication gap, the second oil storage groove being provided on the inner wall of the support member facing the first shaft.

4. The rotor assembly according to claim 2, characterized in that, the first oil storage groove is annularly disposed around the first shaft on the inner wall of the first rotor facing the first shaft.

5. The rotor assembly according to claim 2, characterized in that, the first rotor includes a plurality of first spiral blades, the first oil storage groove is spirally disposed around the first shaft and is located at a position corresponding to the first spiral blades.

6. The rotor assembly according to any one of claims 1 to 5, characterized in that, a first channel axially disposed along the first shaft and at least one second channel communicating the first channel with the lubrication gap are provided in the first shaft.

7. The rotor assembly according to claim 6, characterized in that, the rotor assembly further comprises: a second shaft; and at least one second rotor fixed on the second shaft, the second rotor being engaged with the first rotor and configured to drive the first rotor to rotate relative to the first shaft.

8. The rotor assembly according to claim 7, characterized in that, the rotor assembly includes two of the second rotors, the rotating member includes two of the first rotors, the two first rotors are coaxially disposed on the first shaft, the rotation directions of the two first rotors are opposite, the two second rotors are symmetrically disposed on the second shaft, and the rotation directions of the two second rotors are opposite.

9. The rotor assembly according to any one of claims 7 to 8, characterized in that, the rotor assembly further comprises: A first bearing housing is provided at one end of the second shaft. There is a first bearing cavity between the first bearing housing and the second shaft. A first bearing disposed on the second shaft is received in the first bearing cavity. The first bearing cavity communicates with the first passage; and A rotor housing, in which the first rotor and the second rotor are received. The rotor housing is provided with a first oil return port communicating with the first bearing cavity.

10. The rotor assembly according to claim 9, characterized in that the rotor assembly further comprises: A second bearing housing is provided at the end of the second shaft away from the first bearing housing. There is a second bearing cavity between the second bearing housing and the second shaft. A second bearing disposed on the second shaft is received in the second bearing cavity; and A flow dividing member, one output end of the flow dividing member communicates with the second bearing cavity, and the other output end of the flow dividing member communicates with the second bearing cavity through the first passage; The rotor housing is provided with a second oil return port communicating with the second bearing cavity.

11. A compressor, characterized in that the compressor comprises the rotor assembly according to any one of claims 1 to 10.

12. An air conditioner, characterized in that the air conditioner comprises the compressor according to claim 11.

Images