Rotor assemblies, compressors and air conditioners

Abstract

Embodiments of the present invention provide a rotor assembly, a compressor, and an air conditioner. The compressor includes: a first rotor capable of rotating along a first axis, the first rotor comprising a first portion and a second portion; a first shaft supporting the first portion and the second portion, the first shaft having a first end and a second end disposed oppositely. During rotation of the first rotor, a predetermined force is applied in the direction from the first end toward the second end, or in the direction from the second end toward the first end. Embodiments of the present invention can reduce the size of the compressor while maintaining substantially unchanged compressor displacement.

Description

Technical Field

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

[0002] A compressor typically features a pair of parallel helical rotors housed within the compressor's housing. As the rotors rotate, the volume of the housing periodically increases and decreases, connecting and closing the housing to the intake and exhaust ports, completing the intake, compression, and exhaust processes.

[0003] During the rotation of the pair of helical rotors, two axial forces in opposite directions are generated along the axis of rotation of the helical rotors. In order to limit the axial forces in two directions during the rotation of the helical rotors, two thrust bearings are provided on the rotating shaft supporting the helical rotors to limit the axial forces in two directions, so that the rotation of the helical rotors is relatively stable.

[0004] However, the exhaust volume of a compressor having a pair of parallel spiral rotors is related to its size. The size of the compressor is determined by the size of its exhaust volume. Smaller compressors often have insufficient exhaust volume and cannot be used in some occasions that require a small compressor with large exhaust volume. Summary of the Invention

[0005] Embodiments of the present invention provide a rotor assembly, a compressor, and an air conditioner, which can reduce the size of the compressor while keeping the exhaust volume of the compressor substantially unchanged.

[0006] An embodiment of the present invention provides a compressor, comprising:

[0007] a first rotor rotatable along a first axis, the first rotor comprising a first portion and a second portion; and

[0008] a first shaft body, carrying the first part and the second part, the first shaft body having a first end and a second end oppositely disposed;

[0009] During the rotation of the first rotor, there is a preset force in the direction from the first end toward the second end or in the direction from the second end toward the first end.

[0010] In an optional embodiment of the present invention, the present invention further includes:

[0011] a second rotor rotatable along a second axis, the second rotor including a third portion meshing with the first portion and a fourth portion meshing with the second portion; and

[0012] a second shaft, carrying the third part and the fourth part;

[0013] During the rotation of the first rotor and the second rotor, there is a preset force in the direction of the first end toward the second end or in the direction of the second end toward the first end.

[0014] In an optional embodiment of the present invention, the shape of the first portion is different from the shapes of the second portion and the fourth portion; and / or

[0015] The shape of the third portion is different from the shapes of the second portion and the fourth portion, so as to generate a pressure difference during the rotation of the first rotor and the second rotor to form the preset force.

[0016] In an optional embodiment of the present invention, the shape of the first part is different from the shape of the second part and the fourth part, including any one of the difference between the first part and the second part or the fourth part in the length, the number of spiral leaves, the end face profile, the density of the spiral leaves and the diameter.

[0017] In an optional embodiment of the present invention, the shape of the third part is different from the shapes of the second part and the fourth part, including any one of the difference between the third part and the second part or the fourth part in the length, the number of spiral leaves, the end face profile, the density of the spiral leaves and the diameter.

[0018] In an optional embodiment of the present invention, the first part and / or the third part is provided with a first air supply hole, and the second part and / or the fourth part is provided with a second air supply hole. The first air supply hole and the second air supply hole are different from each other to generate an air pressure difference during the rotation of the first rotor and the second rotor to form the preset force.

[0019] In an optional embodiment of the present invention, the number of the first air-supplementing holes is different from the number of the second air-supplementing holes; and / or

[0020] The size of the first air-supplementing hole is different from the size of the second air-supplementing hole; and / or

[0021] The distance between the first air-supplementing hole and the end surface of the first part away from the second part is different from the distance between the second air-supplementing hole and the end surface of the second part away from the first part; and / or

[0022] A distance between the first air supply hole and an end surface of the third portion away from the fourth portion is different from a distance between the second air supply hole and an end surface of the fourth portion away from the third portion.

[0023] In an optional embodiment of the present invention, at least one of the first part and the third part is provided with an air-supply hole, and / or at least one of the second part and / or the fourth part is provided with an air-supply hole.

[0024] In an optional embodiment of the present invention, the shape of the shell corresponding to the first part is different from the shapes of the shells corresponding to the second part and the fourth part; and / or

[0025] The shape of the shell corresponding to the third part is different from the shapes of the shells corresponding to the second part and the fourth part, so as to generate an air pressure difference during the rotation of the first rotor and the second rotor to form the preset force.

[0026] In an optional embodiment of the present invention, the shell is provided with a first exhaust port and a second exhaust port, and the length of the first exhaust port along the direction from the first end to the second end is different from the length of the second exhaust port along the direction from the second end to the first end.

[0027] In an optional embodiment of the present invention, the shell corresponding to the first part and / or the shell corresponding to the third part is provided with a first air supply hole, and the shell corresponding to the second part and / or the shell corresponding to the fourth part is provided with a second air supply hole;

[0028] The number of the first air-supplementing holes is different from the number of the second air-supplementing holes; and / or

[0029] The size of the first air-supplementing hole is different from the size of the second air-supplementing hole; and / or

[0030] The distance between the first air-supplementing hole and the end surface of the first part away from the second part is different from the distance between the second air-supplementing hole and the end surface of the second part away from the first part; and / or

[0031] A distance between the first air supply hole and an end surface of the third portion away from the fourth portion is different from a distance between the second air supply hole and an end surface of the fourth portion away from the third portion.

[0032] In an optional embodiment of the present invention, at least one of the shell corresponding to the first part and the shell corresponding to the third part has an air supply hole, and / or at least one of the shell corresponding to the second part and / or the shell corresponding to the fourth part has an air supply hole.

[0033] In an optional embodiment of the present invention, the first part and the second part are arranged along the direction of gravity, and the third part and the fourth part are arranged along the direction of gravity. During the rotation of the first rotor and the second rotor, the gravity of the first part, the second part, the third part, the fourth part, the first shaft and the second shaft causes the first rotor and the second rotor to have the preset force during the rotation; or

[0034] The arrangement direction of the first part and the second part has an angle less than 90 degrees with the direction of gravity, and the arrangement direction of the third part and the fourth part is the same as the arrangement direction of the first part and the second part. During the rotation of the first rotor, the component force of the first part, the second part, the third part, the fourth part, the first shaft and the second shaft along the direction of gravity causes the first rotor and the second rotor to have the preset force during the rotation.

[0035] In an optional embodiment of the present invention, the compressor further includes a magnetic component, and the magnetic component is used to generate magnetic force so that the first rotor and the second rotor have the preset force during their rotation.

[0036] In an optional embodiment of the present invention, the compressor further comprises an oil circuit system, wherein the pressure exerted by the oil circuit system on the first end portion is less than the pressure exerted by the oil circuit system on the second end portion, so that the first rotor and the second rotor have the preset force during rotation; or

[0037] The pressure exerted by the oil system on the third end is less than the pressure exerted by the oil system on the fourth end, so that the first rotor and the second rotor have the preset force during their rotation.

[0038] In an optional embodiment of the present invention, the present invention further includes:

[0039] A first thrust bearing is provided at the first end portion or the second end portion, and the preset force is used to apply to the first thrust bearing.

[0040] In an optional embodiment of the present invention, the first shaft is not provided with a thrust bearing, and the first part and the second part are both made of non-metallic materials.

[0041] In an optional embodiment of the present invention, the first shaft is not provided with a thrust bearing, a first anti-collision structure is provided between an end of the first part away from the second part and the housing of the compressor, and a second anti-collision structure is provided between an end of the second part away from the first part and the housing of the compressor.

[0042] In an optional embodiment of the present invention, the present invention further includes:

[0043] a first thrust bearing disposed at the first end portion or the second end portion; and

[0044] The second thrust bearing is arranged at the third end portion or the fourth end portion, and the preset force is used to apply to the first thrust bearing and the second thrust bearing.

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

[0046] a first thrust bearing, disposed at the first end portion or the second end portion, wherein the preset force is used to apply to the first thrust bearing;

[0047] Wherein, the second shaft is not provided with a thrust bearing, and the third part and the fourth part are made of non-metallic materials;

[0048] The first part and / or the second part are integrally formed with the first shaft, and the third part and the fourth part are rotatable around the second shaft.

[0049] In an optional embodiment of the present invention, the present invention further includes:

[0050] a first thrust bearing, disposed at the first end portion or the second end portion, wherein the preset force is used to apply to the first thrust bearing;

[0051] The first shaft is not provided with a thrust bearing, a third anti-collision structure is provided between an end of the third portion away from the fourth portion and the housing of the compressor, and a fourth anti-collision structure is provided between an end of the fourth portion away from the third portion and the housing of the compressor;

[0052] The first part and / or the second part are integrally formed with the first shaft, and the third part and the fourth part are rotatable around the second shaft.

[0053] An embodiment of the present invention provides a compressor, comprising:

[0054] A housing, wherein the housing is provided with a first exhaust port and a second exhaust port;

[0055] a first rotor rotatable within the housing along a first axis, the first rotor comprising a first portion and a second portion; and

[0056] a second rotor rotatable along a second axis within the housing, the second rotor comprising a third portion meshing with the first portion and a fourth portion meshing with the second portion;

[0057] The first exhaust port is located at the same end of the first rotor and the second rotor, the second exhaust port is located at the same end of the first rotor and the second rotor, the first exhaust port and the second exhaust port are located at different ends of the first rotor, and the first exhaust port and the second exhaust port are located at different ends of the second rotor, and the length of the first exhaust port along the direction parallel to the first axis is greater than the length of the second exhaust port along the direction parallel to the first axis.

[0058] In an optional embodiment of the present invention, the present invention further includes:

[0059] a first shaft, carrying the first part and the second part;

[0060] a second shaft body, carrying the third part and the fourth part; and

[0061] The first thrust bearing is provided on the first shaft and is located on the same side of the first portion and the second portion.

[0062] An embodiment of the present invention provides a compressor, comprising:

[0063] case;

[0064] a first rotor rotatable within the housing along a first axis, the first rotor comprising a first portion and a second portion; and

[0065] a second rotor rotatable along a second axis within the housing, the second rotor comprising a third portion meshing with the first portion and a fourth portion meshing with the second portion;

[0066] At least one of the first part, the third part, the shell corresponding to the first part, and the shell corresponding to the third part is provided with a first air supply hole, and at least one of the second part, the fourth part, the shell corresponding to the second part, and the shell corresponding to the fourth part is provided with a second air supply hole;

[0067] The number of the first air-supplementing holes is less than the number of the second air-supplementing holes; and / or

[0068] The size of the first air-supplementing hole is smaller than the size of the second air-supplementing hole; and / or

[0069] A distance between the first air-supplementing hole and an end surface of the first portion away from the second portion is greater than a distance between the second air-supplementing hole and an end surface of the second portion away from the first portion.

[0070] In an optional embodiment of the present invention, the present invention further includes:

[0071] a first shaft, carrying the first part and the second part;

[0072] a second shaft body, carrying the third part and the fourth part; and

[0073] The first thrust bearing is provided on the first shaft and is located on the same side of the first portion and the second portion.

[0074] An embodiment of the present invention provides a compressor, comprising:

[0075] case;

[0076] a first rotor rotatable within the housing along a first axis, the first rotor comprising a first portion and a second portion; and

[0077] a second rotor rotatable along a second axis within the housing, the second rotor comprising a third portion meshing with the first portion and a fourth portion meshing with the second portion;

[0078] The first part, the third part, the shell corresponding to the first part and the shell corresponding to the third part do not have air supply holes, and at least one of the second part, the fourth part, the shell corresponding to the first part and the shell corresponding to the fourth part has an air supply hole.

[0079] In an optional embodiment of the present invention, the present invention further includes:

[0080] a first shaft, carrying the first part and the second part;

[0081] a second shaft body, carrying the third part and the fourth part; and

[0082] The first thrust bearing is provided on the first shaft and is located on the same side of the first portion and the second portion.

[0083] An embodiment of the present invention further provides a rotor assembly, comprising:

[0084] a first rotor comprising a first portion and a second portion rotatable along a first axis; and

[0085] a second rotor rotatable along a second axis, the second rotor comprising a third portion meshing with the first portion and a fourth portion meshing with the second portion;

[0086] The first part and / or the third part is provided with a first air-supplementing hole, and the second part and / or the fourth part is provided with a second air-supplementing hole;

[0087] The number of the first air-supplementing holes is less than the number of the second air-supplementing holes; and / or

[0088] The size of the first air-supplementing hole is smaller than the size of the second air-supplementing hole; and / or

[0089] A distance between the first air-supplementing hole and an end surface of the first portion away from the second portion is greater than a distance between the second air-supplementing hole and an end surface of the second portion away from the first portion.

[0090] An embodiment of the present invention further provides a rotor assembly, comprising:

[0091] a first rotor comprising a first portion and a second portion rotatable along a first axis; and

[0092] a second rotor rotatable along a second axis within the housing, the second rotor comprising a third portion meshing with the first portion and a fourth portion meshing with the second portion;

[0093] At least one of the first part and the third part is provided with an air-supplementing hole, and / or at least one of the second part and / or the fourth part is provided with an air-supplementing hole.

[0094] An embodiment of the present invention further provides a rotor assembly, comprising a first rotor rotatable along a first axis, the first rotor comprising a first portion having a first air supply hole and a second portion having a second air supply hole;

[0095] The number of the first air-supplementing holes is less than the number of the second air-supplementing holes; and / or

[0096] The size of the first air-supplementing hole is smaller than the size of the second air-supplementing hole; and / or

[0097] A distance between the first air-supplementing hole and an end surface of the first portion away from the second portion is greater than a distance between the second air-supplementing hole and an end surface of the second portion away from the first portion.

[0098] An embodiment of the present invention further provides a rotor assembly, which includes a first rotor rotatable along a first axis, wherein the first rotor includes a first part and a second part, and an air supply hole is formed in one of the first part and the second part.

[0099] An embodiment of the present invention further provides an air conditioner, comprising the compressor as described in any one of the above items; or

[0100] Comprising a rotor assembly as described in any one of the above items.

[0101] In an embodiment of the present invention, the first and second portions of the first rotor, supported by the first shaft, can rotate along a first axis. During the rotation of the first rotor, a preset force can be exerted in a single direction. For example, during the rotation of the first rotor, a preset force can be exerted in a direction from the first end toward the second end. Another example is during the rotation of the first rotor, a preset force can be exerted in a direction from the second end toward the first end. This embodiment of the present invention enables the compressor to exert a single axial force during operation. This allows the specific direction of this single axial force to be determined during operation, allowing for measures to be taken to limit this single axial force without requiring restrictions in directions where no axial force is exerted. Compared to the prior art, in situations where the axial force is uncertain or when axial force is exerted at both ends, this embodiment of the present invention eliminates the need to restrict the axial force at both ends of the first shaft, and can instead restrict the axial force toward one end. Consequently, this embodiment of the present invention can reduce the size of the compressor without substantially affecting the compressor's exhaust volume or stability.

[0102] During rotation, the first rotor of the embodiment of the present invention can mesh with other rotor structures, such as the second rotor. The meshing of the first portion of the first rotor with the third portion of the second rotor, and the meshing of the second portion of the first rotor with the fourth portion of the second rotor, can form two rotor pairs. Compared to the prior art, the meshing of the first rotor and the second rotor of the embodiment of the present invention is equivalent to two screw compressors in parallel. Therefore, when the compressor of the embodiment of the present invention and the screw compressor in the prior art have the same or similar exhaust volume, the compressor of the embodiment of the present invention can greatly reduce the size of the compressor. In combination with the compressor of the embodiment of the present invention, a single-direction axial force can be applied to the first and second rotors during rotation by a preset force. Compared to the prior art that uses two thrust bearings to limit a rotor structure, the embodiment of the present invention can use a single thrust bearing to limit a rotor to enable stable operation, thereby further reducing the size of the compressor when the exhaust volume of the compressor of the embodiment of the present invention is substantially the same as that of the existing screw compressor. BRIEF DESCRIPTION OF THE DRAWINGS

[0103] To more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. Those skilled in the art can also derive other drawings based on these drawings without inventive effort.

[0104] In order to more completely understand the present invention and its beneficial effects, the following description will be given in conjunction with the accompanying drawings, wherein the same reference numerals in the following description represent the same parts.

[0105] Figure 1A partial schematic diagram of a first compressor provided in an embodiment of the present invention.

[0106] Figure 2 A schematic diagram of the cooperation between the first rotor, the second rotor, the first shaft and the second shaft in the compressor provided in an embodiment of the present invention.

[0107] Figure 3 A partial schematic diagram of a second compressor provided in an embodiment of the present invention.

[0108] Figure 4 A partial schematic diagram of a third compressor provided in an embodiment of the present invention.

[0109] Figure 5 A partial schematic diagram of a fourth compressor provided in an embodiment of the present invention.

[0110] Figure 6 This is a partial schematic diagram of a fifth compressor provided in an embodiment of the present invention.

[0111] Figure 7 A partial schematic diagram of a sixth compressor provided in an embodiment of the present invention.

[0112] Figure 8 A partial schematic diagram of a seventh compressor provided in an embodiment of the present invention.

[0113] Figure 9 A partial schematic diagram of an eighth compressor provided in an embodiment of the present invention.

[0114] Figure 10 This is a partial schematic diagram of a ninth compressor provided in an embodiment of the present invention.

[0115] Figure 11 This is a partial schematic diagram of a tenth compressor provided in an embodiment of the present invention.

[0116] Figure 12 This is a partial schematic diagram of an eleventh compressor provided in an embodiment of the present invention.

[0117] 10. First shaft; 11. First axis; 12. First end; 14. Second end;

[0118] 20. First rotor; 22. First portion; 221. First air supply hole; 222. First spiral blade; 223. First exhaust end surface; 24. Second portion; 241. Second air supply hole; 242. Second spiral blade; 243. Second exhaust end surface;

[0119] 30. Second shaft; 31. Second axis; 32. Third end; 34. Fourth end;

[0120] 40. Second rotor; 42. Third portion; 421. Third air supply hole; 422. Third spiral blade; 423. Third exhaust end surface; 44. Fourth portion; 442. Fourth spiral blade; 443. Fourth exhaust end surface;

[0121] 50. First thrust bearing;

[0122] 60, housing; 62, fourth air supply hole; 64, fifth air supply hole;

[0123] 70. Second thrust bearing;

[0124] 80. Transmission assembly; 82. First transmission member; 84. Second transmission member;

[0125] 90. Drive motor; 92. Motor rotor; Motor stator;

[0126] 200, compressor; 201, first exhaust port; 202, second exhaust port; 203, air intake port;

[0127] H1, first direction;

[0128] H2, second direction;

[0129] L1, the distance between the first air supply hole and the first exhaust end face;

[0130] L2, the distance between the second air supply hole and the second exhaust end face;

[0131] L3, the length of the first exhaust port along the first direction;

[0132] L4, the length of the second exhaust port along the second direction;

[0133] L5, the length of the first portion along the first axis;

[0134] L6, the length of the second portion along the first axis;

[0135] L7, first spacing;

[0136] L8, second spacing. DETAILED DESCRIPTION

[0137] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present invention and its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative work are within the scope of protection of the present invention.

[0138] References herein to "embodiments" or "implementations" mean that a particular feature, structure, or characteristic described in connection with the embodiment or implementation may be included in at least one embodiment of the present invention. The appearance of such phrases in various places in the specification does not necessarily refer to the same embodiment, nor do they constitute independent or alternative embodiments that are mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0139] Embodiments of the present invention provide a rotor assembly, a compressor, and an air conditioner.

[0140] See also Figure 1 , Figure 1 A partial schematic diagram of a first compressor provided in an embodiment of the present invention. Figure 1 The compressor 200 shown may be a screw compressor, such as an opposed screw compressor. Figure 1 The compressor 200 shown is not limited to a screw compressor. For example, the compressor 200 may also be a scroll compressor. The compressor 200 includes a first shaft 10, a first rotor 20, a second shaft 30, a second rotor 40, a first thrust bearing 50, and a housing 60. The housing 60 can accommodate the first rotor 20 and the second rotor 40, and can also accommodate a portion of the first shaft 10 and a portion of the second shaft 30.

[0141] The housing 60 has a storage space for accommodating the first rotor 20, the second rotor 40, a portion of the first shaft 10, and a portion of the second shaft 30. The housing 60 also has a first exhaust port 201, a second exhaust port 202, and an intake port 203, which communicate with the storage space for the first rotor 20, the second rotor 40, a portion of the first shaft 10, and a portion of the second shaft 30. The intake port 203 is used to transfer gas outside the housing 60 to the storage space within the housing 60 when the first rotor 20 and the second rotor 40 mesh and rotate. The first exhaust port 201 and the second exhaust port 202 are used to compress the gas within the storage space of the housing 60 and expel it outside the housing 60 when the first rotor 20 and the second rotor 40 mesh and rotate. This allows the compressor 200 to perform the intake, compression, and exhaust processes. The first exhaust port 201 and the second exhaust port 202 are located at opposite ends of the housing 60 along the first axis 11 of the first shaft 10. The intake port 203 is located in the middle of the housing 60 along the first axis 11 of the first shaft 10.

[0142] It should be noted that the terms "first," "second," and so on in the specification, claims, and drawings of the present invention are used to distinguish between different objects, rather than to describe a specific order. Furthermore, the terms "including," "having," and any variations thereof are intended to cover non-exclusive inclusions.

[0143] The first rotor 20 and the second rotor 40 mesh with each other. In an embodiment of the present invention, the first rotor 20 may be a male rotor, and the second rotor 40 may be a female rotor. In other embodiments of the present invention, the first rotor 20 may be a female rotor, and the second rotor 40 may be a male rotor. The following embodiments of the present invention are described in detail using the example of the first rotor 20 being a male rotor and the second rotor 40 being a female rotor.

[0144] The first rotor 20 as the male rotor can be understood as the active rotor, and the second rotor 40 as the female rotor can be understood as the driven rotor. For example, the first rotor 20 can be connected to a drive assembly such as a motor (including but not limited to a permanent magnet motor). The first rotor 20 can be driven to rotate by the drive assembly, and the rotation of the first rotor 20 simultaneously drives the second rotor 40 to rotate.

[0145] The first rotor 20 is carried by the first shaft 10 and is in transmission connection with the drive assembly via the first shaft 10. The drive assembly can drive the first shaft 10 to rotate, and the first shaft 10 can rotate along the first axis 11 of the first shaft 10 together with the first rotor 20 it carries. That is, the first rotor 20 can rotate within the housing 60 along the first axis 11. In an embodiment of the present invention, the first rotor 20 can be integrally formed with the first shaft 10. In other embodiments of the present invention, a portion of the first rotor 20 can be integrally formed with the first shaft 10, while a portion can be sleeved on the first shaft 10. In other embodiments of the present invention, the first rotor 20 can be directly sleeved on the first shaft 10.

[0146] For example, the first rotor 20 may have at least two parts, such as a first part 22 and a second part 24, and both the first part 22 and the second part 24 may be integrally formed with the first shaft 10. One of the first part 22 and the second part 24, such as the first part 22, may be integrally formed with the first shaft 10, and the other part, such as the second part 24, may be sleeved on the first shaft 10. Both the first part 22 and the second part 24 are sleeved on the first shaft 10.

[0147] See also Figure 2 , Figure 2 A schematic diagram illustrating the coordination of the first rotor, second rotor, first shaft, and second shaft in a compressor according to an embodiment of the present invention. The first portion 22 of the first rotor 20 is integrally formed with the first shaft 10, and the second portion 24 is sleeved onto the first shaft 10 and adjacent to the first portion 22. In this embodiment of the present invention, the adjacent end surfaces of the first portion 22 and the second portion 24 may fit together. In other embodiments of the present invention, the adjacent end surfaces of the first portion 22 and the second portion 24 may not fit together, but may have a smaller gap, such as 0.1 mm, 0.2 mm, or 0.3 mm.

[0148] Please continue reading Figure 1 and Figure 2 The first rotor 20 has spiral lobes, which can also be called male lobes. The first rotor 20 includes a first spiral lobe 222 located in the first portion 22 and a second spiral lobe 242 located in the second portion 24. The number of first spiral lobes 222 can be multiple, and the number of second spiral lobes 242 can be multiple. In this embodiment of the present invention, the first spiral lobe 222 and the second spiral lobe 242 are configured to have opposite spiral directions, that is, the rotation directions of the first portion 22 and the second portion 24 are opposite. When the first rotor 20 and the second rotor 40 engage and rotate with each other, opposite axial forces are generated between the first spiral lobe 222 and the second spiral lobe 242, which can also be understood as opposite axial flows generated between the first spiral lobe 222 and the second spiral lobe 242. Due to the symmetry of the axial forces, the opposite axial forces generated between the first spiral lobe 222 and the second spiral lobe 242 can almost cancel each other out.

[0149] It should be noted that, in the description of the present invention, “plurality” means two or more than two, unless otherwise clearly defined.

[0150] Please continue reading Figure 1 and Figure 2 The second rotor 40 is carried by the second shaft body 30. The second shaft body 30 is configured to rotatably support the second rotor 40. The second rotor 40 can rotate relative to the second shaft body 30. The second rotor 40 is engaged with the first rotor 20 and can be driven by the first rotor 20 to rotate on the second shaft body 30 along the second axis 31 of the second shaft body 30. The second rotor 40 can have at least two parts, such as the second rotor 40 having a third part 42 and a fourth part 44. The third part 42 and the fourth part 44 are both sleeved on the second shaft body 30. The third part 42 and the fourth part 44 can both rotate around the second axis 31 within the housing 60.

[0151] The third portion 42 is engaged with the first portion 22, and the fourth portion 44 is engaged with the second portion 24. The rotation direction of the third portion 42 is opposite to that of the first portion 22, and the rotation direction of the fourth portion 44 is opposite to that of the second portion 24.

[0152] The second rotor 40 has spiral lobes, also known as female lobes. The second rotor 40 includes a third spiral lobe 422 located in the third portion 42 and a fourth spiral lobe 442 located in the fourth portion 44. The number of third spiral lobes 422 can be one or more, and the number of fourth spiral lobes 442 can be one or more. In this embodiment of the present invention, the third spiral lobe 422 and the fourth spiral lobe 442 are configured to have opposite spiral directions, i.e., the third portion 42 and the fourth portion 44 have opposite rotation directions. When the first rotor 20 and the second rotor 40 engage and rotate with each other, opposing axial forces are generated between the third spiral lobe 422 and the fourth spiral lobe 442. This can also be understood as opposing axial flows generated between the third spiral lobe 422 and the fourth spiral lobe 442. Due to the symmetry of the axial forces, the opposing axial forces generated between the third spiral lobe 422 and the fourth spiral lobe 442 are almost offset.

[0153] The second shaft 30 can support the third portion 42 and the fourth portion 44 via one or more transmission assemblies 80. For example, the third portion 42 is sleeved on a first transmission member 82 in the transmission assembly 80, and the fourth portion 44 is sleeved on a second transmission member 84 in the transmission assembly 80. The first transmission member 82 and the second transmission member 84 can be sliding bearings or rolling bearings.

[0154] Please continue reading Figure 1 The first shaft 10 has a first end 12 and a second end 14, and the first portion 22 and the second portion 24 of the first rotor 20 are disposed between the first end 12 and the second end 14. The second shaft 30 has a third end 32 and a fourth end 34, and the third portion 42 and the fourth portion 44 of the second rotor 40 are confined between the third end 32 and the fourth end 34. The first portion 22 has a first exhaust end face 223 located at the first exhaust port 201 and a first intake end face (not shown in the figure) located at the intake port 203. The second portion 24 has a second exhaust end face 243 located at the second exhaust port 202 and a second intake end face (not shown in the figure) located at the intake port 203. The first intake end face and the second intake end face are adjacent to each other. In this embodiment of the present invention, the first intake end face and the second intake end face may or may not be in contact. In an optional embodiment of the present invention, the first shaft 10 may be parallel to the second shaft 30, and the first axis 11 of the first shaft 10 may be parallel to the second axis 31 of the second shaft 30.

[0155] The third portion 42 has a third exhaust end surface 423 located at the location of the first exhaust port 201 and a third intake end surface (not shown) located at the location of the intake port 203. The fourth portion 44 has a fourth exhaust end surface 443 located at the location of the second exhaust port 202 and a fourth intake end surface (not shown) located at the location of the intake port 203. The third and fourth intake end surfaces are adjacent to each other. In this embodiment of the present invention, the third and fourth intake end surfaces are spaced apart to ensure that the first portion 22 and the fourth portion 44, as well as the second portion 24 and the third portion 42, do not interfere with each other.

[0156] The housing 60 has a fifth exhaust end surface (not shown) located at the location of the first exhaust port 201 and a sixth exhaust end surface (not shown) located at the location of the second exhaust port. The fifth exhaust end surface can be spaced apart from the first exhaust end surface 223 and the third exhaust end surface 423 by a distance less than a first predetermined value, so that the first exhaust end surface 223 and the third exhaust end surface 423 are unlikely to touch each other while maintaining a distance therebetween. The sixth exhaust end surface can be spaced apart from the second exhaust end surface 243 and the fourth exhaust end surface 443 by a distance less than a first predetermined value, so that the first exhaust end surface 223 and the third exhaust end surface 423 are unlikely to touch each other while maintaining a distance therebetween.

[0157] The first thrust bearing 50 is disposed on the first shaft 10, such as at the second end 14 of the first shaft 10. In some other embodiments of the present invention, the first thrust bearing 50 is disposed at the first end 12.

[0158] For the first rotor 20 and the second rotor 40, when the first rotor 20 and the second rotor 40 are engaged with each other and rotate together, opposite axial forces can be generated due to the opposite rotational directions between the first portion 22 and the second portion 24, and opposite axial forces can be generated due to the opposite rotational directions between the third portion 42 and the fourth portion 44. Therefore, the axial forces between the first portion 22 and the second portion 24 can be offset to a certain extent, and the axial forces between the third portion 42 and the fourth portion 44 can be offset to a certain extent.

[0159] However, it should be noted that during the actual production process, it was discovered that, on the one hand, due to manufacturing deviations, there were some differences in the structure of different parts of the first rotor 20, and on the other hand, there were some differences in the structure of different parts of the second rotor 40. There were also differences between the first rotor 20 and the second rotor 40. On the other hand, due to assembly tolerances and deviations, there were certain differences in the fit between the first rotor 20 and the second rotor 40. This made it impossible to completely offset the axial force between the first part 22 and the second part 24, and it made it impossible to completely offset the axial force between the third part 42 and the fourth part 44. It was impossible to achieve almost complete offset of the axial force when the first rotor 20 and the second rotor 40 meshed and rotated together, and a random axial force resultant was formed. This axial force resultant could be in the first direction H1 or the second direction H2.

[0160] On the other hand, during compressor product quantification, the differences between the rotors in each compressor lead to different directions of the resultant axial forces generated by the rotors. For example, the direction of the resultant axial forces of the rotors in some compressors is in the first direction H1, while the direction of the resultant axial forces of the rotors in some compressors is in the second direction H2. In other words, a resultant axial force with random direction and value appears in the entire rotor shaft system, randomly pushing the entire shaft system toward one of the two exhaust end faces, causing the exhaust end face of the rotor on that side to contact and rub against the end face of the casing, leading to failure.

[0161] In the related art, in order to ensure that all molded compressors can operate stably, two sets of thrust bearings (or axial force bearings) are installed on each shaft of the compressor to limit the resultant axial force of the rotors in all molded compressors to ensure that all molded compressors can operate stably.

[0162] Therefore, it is still inevitable that thrust bearings are required to carry and limit the force. However, due to the randomness of the direction of the resultant force, thrust bearings need to meet the requirements of being able to carry and limit the force in both directions. That is, in the actual production and processing of the compressor, in order to ensure the limitation of the resultant axial force of the rotor, thrust bearings (axial force bearings) with two directions of limitation are still required on one rotating shaft. For example, the compressor is equipped with two sets of thrust bearings with opposite load-bearing directions to ensure that the resultant axial force in the two directions that randomly appears is carried. However, for an independent compressor, the direction of the resultant axial force that randomly appears is always the same. At this time, one set of thrust bearings is used for limiting the force, while the other set of thrust bearings is completely idle. Therefore, the cost-effectiveness is low, and it also comes with excess mechanical loss and lubricating oil demand, and increases the failure rate of the compressor. Ultimately, it leads to an increase in the size and cost of the compressor assembly, and to a certain extent reduces the mechanical efficiency of the shaft system operation and increases the demand for lubricating oil.

[0163] Based on this, the embodiment of the present invention ensures that when the first rotor 20 and the second rotor 40 of the compressor 200 engage with each other and rotate together, the first rotor 20 and the second rotor 40 have a determined, single axial direction axial force resultant. Therefore, the embodiment of the present invention only needs to set the first thrust bearing 50 on a shaft body such as the first shaft body 10 to achieve the limitation of the determined, single axial direction axial force resultant, ensuring that the first rotor 20 and the second rotor 40 of the compressor 200 of the embodiment of the present invention can rotate stably without causing contact and friction between the exhaust end face of the rotor and the end face of the shell. Compared with the related art that requires two thrust bearings to be fixed on one shaft body, the compressor of the embodiment of the present invention can save multiple thrust bearings, which can reduce the overall size and cost of the compressor. At the same time, due to the reduction in the number of thrust bearings, the efficiency of the shaft system operation can be improved to a certain extent, and the demand for lubricating oil can be reduced.

[0164] In some embodiments of the present invention, during the production process of the compressor 200, the internal structure of the compressor 200 can be designed with preset differences to ensure that the compressor 200 generates a single, directional axial force resultant between the first rotor 20 and the second rotor 40. For example, the compressor 200 of the present invention can generate a gas force difference in a preset direction by providing differences in the hole and slot structures.

[0165] The following describes the shape of the compressor 200 for accommodating the first rotor 20 and the second rotor 40 and the angle of the gas force difference formed by the shape difference between the first rotor 20 and the second rotor 40.

[0166] In this embodiment of the present invention, during the rotation of the first rotor 20 and the second rotor 40, only a predetermined force is applied to the first thrust bearing 50 in a single, defined direction. This predetermined force can be directed from the second end 14 toward the first end 12. The direction from the second end 14 toward the first end 12 can be defined as the second direction H2, and the direction from the first end 12 toward the second end 14 can be defined as the first direction H1. This predetermined force can be understood as the resultant axial force generated by the meshing rotation of the first and second rotors 20 and 40. During the rotation of the first and second rotors 20 and 40, the axial force on the first and second rotors 20 and 40 in the first direction H1 is less than the axial force on the first and second rotors 20 and 40 in the second direction H2, thereby generating the predetermined force applied to the first thrust bearing 50.

[0167] In the embodiment of the present invention, the shapes of the first portion 22 and the third portion 42 are different from those of the second portion 24 and the fourth portion 44, so as to generate a gas pressure difference during the rotation of the first rotor 20 and the second rotor 40, thereby forming a predetermined force applied to the first thrust bearing 50. It can be understood that the shape of the first portion 22 is different from that of the second portion 24 and the fourth portion 44, and / or the shape of the third portion 42 is different from that of the second portion 24 and the fourth portion 44, so as to generate a gas pressure difference during the rotation of the first rotor 20 and the second rotor 40, thereby forming the predetermined force.

[0168] The shapes of the first portion 22 and the third portion 42 that are different from the shapes of the second portion 24 and the fourth portion 44 include but are not limited to: the shape of the first portion 22 is different from the shape of the second portion 24, and the shape of the third portion 42 is different from the shape of the fourth portion 44; the shape of the first portion 22 is different from the shape of the second portion 24, and the shape of the third portion 42 is the same as the shape of the fourth portion 44; the shape of the first portion 22 is the same as the shape of the second portion 24, and the shape of the third portion 42 is different from the shape of the fourth portion 44; the shape of the first portion 22 is different from the shape of the fourth portion 4 ... The shape of the third part 42 is the same as that of the fourth part 44; the shape of the first part 22 is the same as that of the fourth part 44, and the shape of the third part 42 is different from that of the fourth part 44; the shape of the first part 22 is different from that of the fourth part 44, and the shape of the third part 42 is the same as that of the second part 24; the shape of the first part 22 is different from that of the fourth part 44, and the shape of the third part 42 is different from that of the second part 24; the shape of the first part 22 is the same as ... different from that of the fourth part 44, and the shape of the third part 42 is the same as that of the fourth part 44.

[0169] See also Figure 3 , Figure 3This is a partial schematic diagram of a second compressor provided in an embodiment of the present invention. Furthermore, the shapes of the first portion 22 and the third portion 42 differ from the shapes of the second portion 24 and the fourth portion 44, including but not limited to: the shape of the first portion 22 differs from the shapes of the second portion 24 and the fourth portion 44 by any one of the following: length, number of spiral blades, end profile, density of spiral blades, and diameter; and / or the shape of the third portion 42 differs from the shapes of the second portion 24 and the fourth portion 44 by any one of the following: length, number of spiral blades, end profile, density of spiral blades, and diameter;

[0170] Figure 3 In the illustrated compressor 200, the length L5 of the first portion 22 of the first rotor 20 along the first axis is different from the length L6 of the second portion 24 along the first axis. For example, the length L5 of the first portion 22 along the first axis 11 is less than the length L6 of the second portion 24 along the first axis 11. In some alternative embodiments, the number of second spiral lobes 242 of the second portion 24 is greater than the number of first spiral lobes 222 of the first portion 22.

[0171] During the operation of the compressor 200, the first part 22 and the second part 24 both rotate along the first axis 11. Since the length of the second part 24 along the first axis 11 is greater than the length L5 of the first part 22 along the first axis 11, the first rotor 20 forms an axial resultant force in the second direction H2 during rotation, thereby achieving axial force orientation.

[0172] It should be noted that the method of achieving axial orientation by having different shapes of the first part 22 and the second part 24 is not limited to this, such as the diameters of the first part 22 and the second part 24, the densities of the first spiral leaves 222 of the first part 22 and the second spiral leaves 242 of the second part 24, the thicknesses of the first spiral leaves 222 of the first part 22 and the second spiral leaves 242 of the second part 24, and the end face profiles of the first part 22 and the second part 24.

[0173] In this embodiment of the present invention, at least one of the first portion 22 and the third portion 42 defines a first air supply hole 221, and at least one of the second portion 24 and the fourth portion 44 defines a second air supply hole 241. The first air supply hole 221 and the second air supply hole 241 differ from each other to generate an air pressure difference during the rotation of the first rotor 20 and the second rotor 40, thereby generating a predetermined force on the first thrust bearing 50. There can be one or more first air supply holes 221, and one or more second air supply holes 241.

[0174] In an optional embodiment of the present invention, please refer to Figure 1 , the number of the first air supply holes 221 is less than the number of the second air supply holes 241. For example, the number of the first air supply holes 221 is 3, and the number of the second air supply holes 241 is 5. During the air supply process, the air supply volume of the second part 24 and the fourth part 44 is greater than the air supply volume of the first part 22 and the third part 42. During the rotation of the first rotor 20 and the second rotor 40, the air pressure formed by the first part 22 and the third part 42 is less than the air pressure formed by the second part 24 and the fourth part 44. As a result, the gas force difference between the first rotor 20 and the second rotor 40 is applied to the first thrust bearing 50 along the second direction H2. The embodiment of the present invention realizes axial force orientation, and the change in the number of processing air supply holes is easiest to achieve, and is suitable for models with economizer air supply turned on under all working conditions.

[0175] In an optional embodiment of the present invention, please refer to Figure 4 , Figure 4 A partial schematic diagram of the third compressor provided in an embodiment of the present invention. The distance between the first air-supply hole 221 and the end face of the first part 22 away from the second part 24 is greater than the distance between the second air-supply hole 241 and the end face of the second part 24 away from the first part 22. That is, the distance L1 between the first air-supply hole 221 and the first exhaust end face 223 is greater than the distance L2 between the second air-supply hole 241 and the second exhaust end face 243. In some other embodiments, the distance between the first air-supply hole 221 and the end face of the third part 42 away from the fourth part 44 is greater than the distance between the second air-supply hole 241 and the end face of the fourth part 44 away from the third part 42. That is, the distance between the first air-supply hole 221 and the third exhaust end face 423 is greater than the distance between the second air-supply hole 241 and the fourth exhaust end face 443. During the air-supply process, the second part 24 and the fourth part 44 can be air-supplemented earlier than the first part 22 and the third part 42. During the rotation of the first and second rotors 20 and 40, the air pressure generated by the first and third portions 22 and 42 is lower than the air pressure generated by the second and fourth portions 24 and 44. This differential air force between the first and second rotors 20 and 40 is thus applied to the first thrust bearing 50 in the second direction H2. This embodiment of the present invention makes it easier to adjust the axial position and size of each air supply hole, making it suitable for models with economizer air supply enabled under all operating conditions.

[0176] In an optional embodiment of the present invention, please refer to Figure 5 , Figure 5A partial schematic diagram of a fourth compressor provided by an embodiment of the present invention. The size of the first air supply hole 221 is smaller than that of the second air supply hole 241. During the air supply process, the air supply volume of the second portion 24 and the fourth portion 44 is greater than that of the first portion 22 and the third portion 42. During the rotation of the first rotor 20 and the second rotor 40, the air pressure generated by the first portion 22 and the third portion 42 is lower than the air pressure generated by the second portion 24 and the fourth portion 44. As a result, the air force difference between the first rotor 20 and the second rotor 40 is applied to the first thrust bearing 50 along the second direction H2.

[0177] In an optional embodiment of the present invention, please refer to Figure 1 、 Figure 4 and Figure 5 The first air supply hole 221 is disposed in the first portion 22 , and the second air supply hole 241 is disposed in the second portion 24 .

[0178] In an optional embodiment of the present invention, the first air supplement hole 221 is provided in the first portion 22 , and the second air supplement hole 241 is provided in the fourth portion 44 .

[0179] In an optional embodiment of the present invention, please refer to Figure 6 , Figure 6 A partial schematic diagram of a fifth compressor provided by an embodiment of the present invention. The third air supply hole 421 is provided in the third portion 42, and the second air supply hole 241 is provided in the second portion 24. It should be noted that the third air supply hole 421 provided in the third portion 42 can be understood as the first air supply hole.

[0180] In an optional embodiment of the present invention, the first air supply hole is provided in the third portion 42 , and the second air supply hole is provided in the fourth portion 44 .

[0181] In an optional embodiment of the present invention, the first air supplement hole 221 is provided in the first portion 22 , and the second air supplement hole is provided in the second portion 24 and the fourth portion 44 .

[0182] In an optional embodiment of the present invention, the first air supply hole is provided in the third portion 42 , and the second air supply hole is provided in the second portion 24 and the fourth portion 44 .

[0183] In an optional embodiment of the present invention, the first air supply hole is provided in the first portion 22 and the third portion 42 , and the second air supply hole 241 is provided in the second portion 24 .

[0184] In an optional embodiment of the present invention, the first air supply hole is provided in the first portion 22 and the third portion 42 , and the second air supply hole is provided in the fourth portion 44 .

[0185] In an optional embodiment of the present invention, at least one of the first portion 22 and the third portion 42 is provided with an air supply hole, and / or at least one of the second portion 24 and / or the fourth portion 44 is provided with an air supply hole.

[0186] In an optional embodiment of the present invention, please refer to Figure 7 , Figure 7 A partial schematic diagram of the sixth compressor provided by an embodiment of the present invention. No air supply holes are provided in the first portion 22 and the third portion 42, while at least one of the second portion 24 and the fourth portion 44 is provided with an air supply hole, such as the second air supply hole 241. During the air supply process, the second portion 24 and the fourth portion 44 are capable of air supply, while the first portion 22 and the third portion 42 are not. During the rotation of the first rotor 20 and the second rotor 40, the air pressure generated by the first portion 22 and the third portion 42 is lower than the air pressure generated by the second portion 24 and the fourth portion 44. This causes the air force difference between the first rotor 20 and the second rotor 40 to be applied to the first thrust bearing 50 along the second direction H2.

[0187] In an optional embodiment of the present invention, the shape of the shell corresponding to the first part 22 and the third part 42 is different from the shape of the shell corresponding to the second part 24 and the fourth part 44, so as to generate an air pressure difference during the rotation of the first rotor 20 and the second rotor 40 to form a preset force applied to the first thrust bearing 50.

[0188] In an optional embodiment of the present invention, please refer to Figure 8 , Figure 8 This is a partial schematic diagram of the seventh compressor provided by an embodiment of the present invention. The housing corresponding to the first portion 22 and the third portion 42 is provided with a fourth air supply hole 62, and the housing corresponding to the second portion 24 and the fourth portion 44 is provided with a fifth air supply hole 64. It should be noted that the fourth air supply hole 62 can be understood as the first air supply hole, and the fifth air supply hole 64 can be understood as the second air supply hole. The relationship between the fourth air supply hole 62 and the fifth air supply hole 64 can be referred to as the relationship between the first air supply hole 221 and the second air supply hole 241, and will not be further described here.

[0189] In an optional embodiment of the present invention, the shells corresponding to the first portion 22 and the third portion 42 have no air supply holes, while the shells corresponding to the second portion 24 and the fourth portion 44 have air supply holes such as the fifth air supply hole 64 .

[0190] In an optional embodiment of the present invention, please refer to Figure 9 , Figure 9A partial schematic diagram of the eighth compressor provided in an embodiment of the present invention. The length L3 of the first exhaust port 201 along the direction from the first end 12 to the second end 14 is greater than the length L4 of the second exhaust port 202 along the direction from the second end 14 to the first end 12. That is, the length of the first exhaust port 201 along the first direction H1 is greater than the length of the second exhaust port 202 along the first direction H1. During the exhaust process, the exhaust volume of the first exhaust port 201 is greater than the exhaust volume of the second exhaust port 202. During the rotation of the first rotor 20 and the second rotor 40, the air pressure formed by the first part 22 and the third part 42 is less than the air pressure formed by the second part 24 and the fourth part 44. As a result, the gas force difference between the first rotor 20 and the second rotor 40 is applied to the first thrust bearing 50 along the second direction H2.

[0191] To increase the pressure differential between the first and third portions 22 and 42 and the second and fourth portions 24 and 44, and to ensure the operational stability of the compressor 200, the embodiment of the present invention can have the housing corresponding to the first and third portions 22 and 42 have different shapes than the housing corresponding to the second and fourth portions 24 and 44, and vice versa. This creates a sufficient pressure differential during the rotation of the first and second rotors 20 and 40 to generate a predetermined force on the first thrust bearing 50. The differences in the shapes of the housing corresponding to the first and third portions 42 and the second and fourth portions 44 are discussed above and will not be further elaborated here. The differences in the shapes of the first and third portions 42 and the second and fourth portions 44 are discussed above and will not be further elaborated here. This embodiment of the present invention achieves axial force orientation while minimizing the differences between the exhaust ports on both sides and ensures reliable operation of the compressor 200, regardless of whether air is being replenished.

[0192] In an optional embodiment of the present invention, during the rotation of the first rotor 20 and the second rotor 40, the axial force of the first rotor 20 and the second rotor 40 in the direction from the first end 12 toward the second end 14 is greater than the axial force in the direction from the second end 14 toward the first end 12, thereby forming a predetermined force applied to the first thrust bearing 50. That is, the axial force of the first rotor 20 and the second rotor 40 in the first direction H1 is greater than the axial force of the first rotor 20 and the second rotor 40 in the second direction H2, thereby forming the predetermined force applied to the first thrust bearing 50.

[0193] In an optional embodiment of the present invention, the axial force orientation of the first rotor 20 and the second rotor 40 can be achieved under the action of a preset force. The first shaft body 10 can be provided with a thrust bearing such as the first thrust bearing 50, while the second shaft body 30 is not provided with a thrust bearing. It should be noted that in the direction of the axial force orientation, the second rotor 40 can withstand contact and friction between its exhaust end face and the exhaust end face of the housing 60 without being damaged. For example, the second rotor 40 is made of a non-metallic material such as peek material, that is, the third part 42 and the fourth part 44 are not made of a non-metallic material such as peek material. For another example, an anti-collision structure such as a copper ring is provided between the second rotor 40 and the housing 60, that is, a first anti-collision structure is provided between the end of the third part 42 away from the fourth part 44 and the housing 60 of the compressor 200, and a second anti-collision structure is provided between the end of the fourth part 44 away from the third part 42 and the housing 60 of the compressor 200. It should also be noted that the first portion 22 and / or the second portion 24 are integrally formed with the first shaft 10, and the third portion 42 and the fourth portion 44 can rotate around the second shaft 30. The second shaft 30 is fixed to the housing 60 and does not rotate.

[0194] In an optional embodiment of the present invention, the axial force of the first rotor 20 and the second rotor 40 can be directed under the action of a preset force. The first shaft 10 is not provided with a thrust bearing, and the second shaft 30 is not provided with a thrust bearing. It should be noted that in the direction of the axial force, both the first rotor 20 and the second rotor 40 can withstand contact and friction between their exhaust end faces and the exhaust end face of the housing 60 without damage. For example, both the first rotor 20 and the second rotor 40 can be made of non-metallic materials such as peek. Another example is that anti-collision structures, such as copper rings, are provided between the first rotor 20 and the second rotor 40 and the housing 60.

[0195] See also Figure 10 , Figure 10 This is a partial schematic diagram of a ninth compressor provided in an embodiment of the present invention. Figure 10 The compressor 200 is shown with Figure 1 、 Figure 2 ,as well as Figure 4-Figure 8 The difference of the compressor 200 shown is that Figure 10 In the illustrated compressor 200, the second shaft 30 is not provided with an axial thrust bearing. The second rotor 40 can be made of a non-metallic material such as peek, or an anti-collision structure such as a copper ring can be provided between the second rotor 40 and the housing 60 to prevent damage to the second rotor 40 when it contacts the housing 60.

[0196] Please continue reading Figure 1 , Figure 2 , Figure 4-Figure 9In an optional embodiment of the present invention, the compressor 200 may further include a second thrust bearing 70 disposed on the second shaft 30, such as at the fourth end 34 of the second shaft 30. In other embodiments of the present invention, the second thrust bearing 70 is disposed at the third end 32. During the rotation of the first rotor 20 and the second rotor 40, only a predetermined force in a single direction is applied to the first and second thrust bearings 50 and 70. Therefore, the present embodiment only requires the first thrust bearing 50 on a single shaft, such as the first shaft 10, and the second thrust bearing 70 on the second shaft 30, to limit the resultant axial force in this single axial direction. This ensures stable rotation of the first and second rotors 20 and 40 of the compressor 200 according to the present embodiment without contact or friction between the rotor exhaust end faces and the housing end face. Compared to related art methods that require two thrust bearings fixed to a single shaft, the compressor according to the present embodiment can eliminate the need for two thrust bearings, thereby reducing the overall size and cost of the compressor. At the same time, due to the reduction in the number of thrust bearings, the efficiency of the shaft system can be improved to a certain extent and the demand for lubricating oil can be reduced.

[0197] In an optional embodiment of the present invention, the axial force of the first rotor 20 and the second rotor 40 can be directed under the action of a preset force. The first shaft 10 can be provided with a thrust bearing, such as the first thrust bearing 50. The second shaft 30 can be provided with two thrust bearings, one of which can be the second thrust bearing 70. Compared with the prior art, this embodiment of the present invention can save one thrust bearing in a two-rotor compressor.

[0198] In some other embodiments of the present invention, a structure for generating an additional force may be arranged on the compressor 200 so as to act on the first rotor 20 and the second rotor 40 when the first rotor 20 and the second rotor 40 are meshed and rotated together, so that the compressor 200 generates a resultant axial force with a determined and unique direction between the first rotor 20 and the second rotor 40. The external force may be one of electromagnetic, gravity, oil pressure, etc. In this embodiment, the shapes of the first part 22 and the second part 24 may be the same or different. The shapes of the third part 42 and the fourth part 44 may be the same or different. The following example illustrates the direction of the axial force of the first rotor 20 and the second rotor 40 driven by an external force.

[0199] See also Figure 11 , Figure 11 This is a partial schematic diagram of a tenth compressor provided in an embodiment of the present invention. Figure 11The illustrated compressor 200 further includes a drive motor 90, which includes a motor rotor 92 and a motor stator 94. The motor rotor 92 is disposed around a portion of the first shaft 10, and the motor stator 94 is disposed around the motor rotor 92. The motor rotor 92 and the motor stator 94 are offset relative to each other at at least one end along the first axis. For example, the motor rotor 92 and the motor stator 94 are offset relative to each other at one end away from the first rotor 20 and the second rotor 40, and are flush relative to each other at the other end. For another example, the motor rotor 92 and the motor stator 94 are flush relative to each other at one end away from the first rotor 20 and the second rotor 40, and are offset relative to each other at the other end. For another example, the motor rotor 92 and the motor stator 94 are offset relative to each other at one end away from the first rotor 20 and the second rotor 40, and are also offset relative to each other at the other end.

[0200] In an optional embodiment of the present invention, the motor rotor 92 and the motor stator 94 are offset from each other at one end away from the first rotor 20 and the second rotor 40, and at the other end. The offset between the ends of the motor rotor 92 and the motor stator 94 away from the first rotor 20 and the second rotor 40 forms a first spacing L7, and the offset between the ends of the motor rotor 92 and the motor stator 94 closer to the first rotor 20 and the second rotor 40 forms a second spacing L8. The motor rotor 92 is closer to the first rotor 20 and the second rotor 40 than the motor stator 94. Thus, a closed magnetic circuit is formed between the motor rotor 92 and the motor stator 94 of the embodiment of the present invention. As a current-carrying conductor, the motor rotor 92 is pulled by electromagnetic force. Because the motor rotor 92 and the motor stator 94 are offset from each other, and the motor rotor 92 is closer to the first rotor 20 and the second rotor 40 than the motor stator 94, the electromagnetic force generated by the drive motor 90 is no longer solely tangential to the outer circumference of the motor rotor 92, but also generates electromagnetic force in the direction opposite to the direction of the motor rotor 92 along the first axis. In other words, the electromagnetic force generated by the drive motor 90 is no longer solely tangential to the outer circumference of the motor rotor 92, but also generates electromagnetic force along the first axis toward the second direction H2. At this time, the resultant electromagnetic force acting on the motor rotor 92 can be decomposed into an electromagnetic force in the direction of the first axis.

[0201] For a permanent magnet variable frequency motor, this electromagnetic force always exists between the motor rotor 92 and the motor stator 94. For a three-phase asynchronous motor, this electromagnetic force is generated between the motor rotor 92 and the motor stator 94 as soon as the drive motor is powered on. For the first rotor 20 and / or the second rotor 40, an electromagnetic force is generated along the first axis, ensuring that the first rotor 20 and the second rotor 40 are always subjected to an axial force in a fixed direction. Therefore, only one set of thrust bearings, such as the first thrust bearing 50, is required, and the entire mechanism does not include a reverse thrust bearing.

[0202] The compressor 200 may adopt a transverse arrangement of the first rotor 20 and the second rotor 40 , so the required electromagnetic force only needs to be slightly greater than the maximum static friction force of the shaft system.

[0203] In an optional embodiment of the present invention, the lengths of the first spacing L7 and the second spacing L8 are the same. It is understandable that in the related art, the motor rotor and the motor stator of a general drive motor are the same length, and the two ends are roughly flush. In the embodiment of the present invention, the lengths of the first spacing L7 and the second spacing L8 are the same. Based on the drive motor in the related art, the motor rotor 92 and the motor stator 94 can be directly offset to obtain the drive motor 90 defined in the embodiment of the present invention. This facilitates processing, assembly and molding. It is understandable that the lengths of the first spacing L7 and the second spacing L8 can also be different.

[0204] It should be noted that in embodiments of the present invention, an additional magnetic component may be disposed within the compressor 200 to generate magnetic force to achieve axial force orientation on the first rotor 20 and the second rotor 40. It is understood that the additional magnetic component disposed within the compressor 200 may directly generate magnetic force or may be energized to generate electromagnetic force. It should also be understood that the magnetic component must be sufficiently spaced from the drive motor 90, or a shielding structure must be provided on the outside of the drive motor 90, so that the magnetic or electromagnetic force generated by the magnetic component does not interfere with the drive motor 90.

[0205] in Figure 11 The second shaft 30 in the compressor 200 shown may not be provided with a thrust bearing, and the second rotor 40 may be made of non-metallic material such as peek material, or anti-collision structures may be provided on the inner wall surfaces of the second rotor 40 and the housing 60 .

[0206] See also Figure 12 , Figure 12 This is a partial schematic diagram of an eleventh compressor provided in an embodiment of the present invention. Figure 12 The drive motor 90, the first rotor 20 and the second rotor 40 in the compressor 200 shown are arranged in the vertical direction. It can be understood as a gravity-type axial bearing structure, in which the first part 22 and the second part 24 of the first rotor 20 are placed vertically, the third part 42 and the fourth part 44 of the second rotor 40 are placed vertically, and the drive motor 90 is placed vertically with the first rotor 20 and the second rotor 40. By rationally utilizing the gravity of the first rotor 20, the second rotor 40 and the drive motor 90, it can be clearly seen that in actual use, the initial direction of the slight deviation before startup, after shutdown, and during unstable operation is always downward, that is, along the second direction H2. This downward initial stress needs to be balanced in a fixed direction through a technical solution. Under the premise that the initial stress direction is clearly downward, a non-motor side, such as Figure 12In the illustrated gravity-type structure, a first thrust bearing 50 (or angular contact bearing) is installed on the upper shaft of the first rotor 20, located at the position of the first shaft body 10. This bearing is used to hold the first rotor 20 in place during initial stress. Because this initial gravity is minimal compared to the gas forces generated by the opposing first and second rotors 20 and 40 during operation, only a single angular contact bearing with higher load capacity is required. The angular contact bearing at the upper end holds the first shaft body 10, the first rotor 20 mounted thereon, and the second rotor 40 meshing with the first rotor 20, to temporarily and slightly offset the axial gas forces acting on the first and second rotors 20 and 40 during normal operation.

[0207] According to theoretical research, if the opposing rotor structures with completely identical tooth shapes generate completely identical gas forces, the axial gas forces cancel each other out, and no angular contact bearings are set in the shaft system, then the initial stress mentioned above will occur during actual use, causing the first rotor 20 and the second rotor 40 to be offset, and there is no corresponding balancing structure. Therefore, the initial stress gradually expands, and the displacement and deformation of the first rotor 20 and the second rotor 40 are ultimately greater than the end face clearance of the first rotor 20 and the second rotor 40, resulting in the risk of scratches between the end faces of the first rotor 20 and the second rotor 40 and the housing 60, causing agitation and the first rotor 20 and the second rotor 40 being scrapped. In the conventional method, in a four-rotor compressor structure with a non-directional and fixed-point setting of the initial balancing force, one or more angular contact bearings are set on both sides, resulting in serious cost waste, product structural redundancy, increased operating power consumption, and reduced product energy efficiency.

[0208] The embodiment of the present invention utilizes the downward initial stress direction of the gravity-loaded first and second rotors 20, 40, to clearly define the downward initial deflection direction of the first shaft 10 and the first rotor 20 thereon. An angular contact bearing is configured on the shaft system above the non-motor side of the first rotor 20, precisely supporting the short-term, minor deflections of the first and second rotors 20, 40 when unstable, effectively preventing scratches on the end faces of the first and second rotors 20, 40, and the housing 60. Structurally, this reduces the number of bearings, easing assembly difficulty, preventing excessive redundancy in the shaft system, reducing the number of moving parts, lowering material and production costs, and improving energy efficiency.

[0209] in Figure 12 The second shaft 30 in the compressor 200 shown may not be provided with a thrust bearing, and the second rotor 40 may be made of non-metallic material such as peek material, or anti-collision structures may be provided on the inner wall surfaces of the second rotor 40 and the housing 60 .

[0210] Embodiments of the present invention achieve unidirectional axial force, or axial force orientation, by arranging a single thrust bearing on one shaft, or by arranging a thrust bearing on one of the two shafts while omitting the other. Compared to prior art compressors that require two thrust bearings per shaft, embodiments of the present invention can eliminate the need for one thrust bearing per shaft. Furthermore, the axial force orientation technology ensures that the axial force remains in the predetermined direction during operation, thereby ensuring stable operation. This allows the overall size of the screw compressor to be reduced, saving costs while ensuring stable operation.

[0211] In addition, compared with the prior art, the embodiment of the present invention can reduce the number of thrust bearings, thereby reducing machine losses and the demand for lubricating oil, thereby reducing the failure rate of the compressor 200 and increasing the life of the compressor.

[0212] The first portion 222 and the second portion 242 of the first rotor 20 and / or the third portion 422 and the fourth portion 442 of the second rotor 40 in the compressor 200 in one or more of the above embodiments can be understood as a rotor assembly or a rotor group. In other words, the first rotor 20 and the second rotor 40 in the compressor 200 in one or more of the above embodiments can be understood as a rotor assembly or a rotor group.

[0213] The compressor 200 in one or more of the above embodiments may be applied to an air conditioner.

[0214] An embodiment of the present invention further provides an air conditioner, which includes a compressor 200 defined in combination with one or more of the above embodiments.

[0215] The rotor assembly, compressor and air conditioner provided in the embodiments of the present invention are introduced in detail above. Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scopes. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A compressor, characterized in that: include: a first rotor rotatable along a first axis, the first rotor comprising a first portion and a second portion; a first shaft body, carrying the first part and the second part, the first shaft body having a first end and a second end oppositely disposed; Also includes: a second rotor rotatable along a second axis, the second rotor comprising a third portion meshing with the first portion and a fourth portion meshing with the second portion; a second shaft body, carrying the third portion and the fourth portion, the second shaft body having a third end portion and a fourth end portion that are oppositely disposed; During the rotation of the first rotor and the second rotor, there is a preset force in the direction of the first end toward the second end or the direction of the second end toward the first end; The shape of the first portion is different from the shapes of the second portion and the fourth portion; and / or The shape of the third portion is different from the shapes of the second portion and the fourth portion, so as to generate a pressure difference during the rotation of the first rotor and the second rotor to form the preset force.

2. The compressor according to claim 1, characterized in that The shapes of the first part, the second part, the third part and the fourth part are any one of length, number of spiral blades, end face profile, density of spiral blades and diameter.

3. The compressor according to claim 1, characterized in that The first part and / or the third part is provided with a first air supply hole, and the second part and / or the fourth part is provided with a second air supply hole. The first air supply hole and the second air supply hole are different from each other to generate an air pressure difference during the rotation of the first rotor and the second rotor to form the preset force.

4. The compressor according to claim 3, characterized in that The number of the first air-supplementing holes is different from the number of the second air-supplementing holes; and / or The size of the first air-supplementing hole is different from the size of the second air-supplementing hole; and / or The distance between the first air-supplementing hole and the end surface of the first part away from the second part is different from the distance between the second air-supplementing hole and the end surface of the second part away from the first part; and / or A distance between the first air supply hole and an end surface of the third portion away from the fourth portion is different from a distance between the second air supply hole and an end surface of the fourth portion away from the third portion.

5. The compressor according to claim 1, characterized in that At least one of the first part and the third part is provided with an air-supplementing hole, and / or at least one of the second part and the fourth part is provided with an air-supplementing hole.

6. The compressor according to claim 1, characterized in that The shape of the housing corresponding to the first part is different from the shapes of the housings corresponding to the second part and the fourth part; and / or The shape of the shell corresponding to the third part is different from the shapes of the shells corresponding to the second part and the fourth part, so as to generate an air pressure difference during the rotation of the first rotor and the second rotor to form the preset force.

7. The compressor according to claim 6, characterized in that The shell defines a first exhaust port and a second exhaust port. A length of the first exhaust port along a direction from the first end to the second end is different from a length of the second exhaust port along a direction from the second end to the first end.

8. The compressor according to claim 6, characterized in that The shell corresponding to the first part and / or the shell corresponding to the third part is provided with a first air supply hole, and the shell corresponding to the second part and / or the shell corresponding to the fourth part is provided with a second air supply hole; The number of the first air-supplementing holes is different from the number of the second air-supplementing holes; and / or The size of the first air-supplementing hole is different from the size of the second air-supplementing hole; and / or The distance between the first air-supplementing hole and the end surface of the first part away from the second part is different from the distance between the second air-supplementing hole and the end surface of the second part away from the first part; and / or A distance between the first air supply hole and an end surface of the third portion away from the fourth portion is different from a distance between the second air supply hole and an end surface of the fourth portion away from the third portion.

9. The compressor according to claim 6, characterized in that At least one of the shell corresponding to the first part and the shell corresponding to the third part is provided with an air supply hole, and / or at least one of the shell corresponding to the second part and the shell corresponding to the fourth part is provided with an air supply hole.

10. The compressor according to any one of claims 1 to 9, characterized in that Also includes: A first thrust bearing is provided at the first end portion or the second end portion, and the preset force is used to apply to the first thrust bearing.

11. The compressor according to any one of claims 1 to 9, characterized in that The first shaft is not provided with a thrust bearing, and the first part and the second part are both made of non-metallic materials.

12. The compressor according to any one of claims 1 to 9, characterized in that The first shaft is not provided with a thrust bearing, a first anti-collision structure is provided between an end of the first part away from the second part and the housing of the compressor, and a second anti-collision structure is provided between an end of the second part away from the first part and the housing of the compressor.

13. The compressor according to any one of claims 1 to 9, characterized in that Also includes: a first thrust bearing, disposed at the first end portion or the second end portion; The second thrust bearing is arranged at the third end portion or the fourth end portion, and the preset force is used to apply to the first thrust bearing and the second thrust bearing.

14. The compressor according to any one of claims 1 to 9, characterized in that Also includes: a first thrust bearing, disposed at the first end portion or the second end portion, wherein the preset force is used to apply to the first thrust bearing; Wherein, the second shaft is not provided with a thrust bearing, and the third part and the fourth part are made of non-metallic materials; The first part and / or the second part are integrally formed with the first shaft, and the third part and the fourth part are rotatable around the second shaft.

15. The compressor according to any one of claims 1 to 9, characterized in that Also includes: a first thrust bearing, disposed at the first end portion or the second end portion, wherein the preset force is used to apply to the first thrust bearing; The first shaft is not provided with a thrust bearing, a third anti-collision structure is provided between an end of the third portion away from the fourth portion and the housing of the compressor, and a fourth anti-collision structure is provided between an end of the fourth portion away from the third portion and the housing of the compressor; The first part and / or the second part are integrally formed with the first shaft, and the third part and the fourth part are rotatable around the second shaft.

16. A compressor, characterized in that: include: a first rotor rotatable along a first axis, the first rotor comprising a first portion and a second portion; a first shaft body, carrying the first part and the second part, the first shaft body having a first end and a second end oppositely disposed; a second rotor rotatable along a second axis, the second rotor comprising a third portion meshing with the first portion and a fourth portion meshing with the second portion; a second shaft body, carrying the third portion and the fourth portion, the second shaft body having a third end portion and a fourth end portion that are oppositely disposed; During the rotation of the first rotor and the second rotor, there is a preset force in the direction of the first end toward the second end or the direction of the second end toward the first end; The first part and the second part are arranged along the direction of gravity, and the third part and the fourth part are arranged along the direction of gravity. During the rotation of the first rotor and the second rotor, the gravity of the first part, the second part, the third part, the fourth part, the first shaft, and the second shaft causes the first rotor and the second rotor to have the preset force during their rotation; or The arrangement direction of the first part and the second part has an angle less than 90 degrees with the direction of gravity, and the arrangement direction of the third part and the fourth part is the same as the arrangement direction of the first part and the second part. During the rotation of the first rotor, the component force of the first part, the second part, the third part, the fourth part, the first shaft and the second shaft along the direction of gravity causes the first rotor and the second rotor to have the preset force during the rotation.

17. The compressor according to claim 16, characterized in that Also includes: A first thrust bearing is provided at the first end portion or the second end portion, and the preset force is used to apply to the first thrust bearing.

18. The compressor according to claim 16, characterized in that The first shaft is not provided with a thrust bearing, and the first part and the second part are both made of non-metallic materials.

19. The compressor according to claim 16, characterized in that The first shaft is not provided with a thrust bearing, a first anti-collision structure is provided between an end of the first part away from the second part and the housing of the compressor, and a second anti-collision structure is provided between an end of the second part away from the first part and the housing of the compressor.

20. The compressor according to claim 16, wherein Also includes: a first thrust bearing, disposed at the first end portion or the second end portion; The second thrust bearing is arranged at the third end portion or the fourth end portion, and the preset force is used to apply to the first thrust bearing and the second thrust bearing.

21. The compressor according to claim 16, wherein Also includes: a first thrust bearing, disposed at the first end portion or the second end portion, wherein the preset force is used to apply to the first thrust bearing; Wherein, the second shaft is not provided with a thrust bearing, and the third part and the fourth part are made of non-metallic materials; The first part and / or the second part are integrally formed with the first shaft, and the third part and the fourth part are rotatable around the second shaft.

22. The compressor according to claim 16, characterized in that Also includes: a first thrust bearing, disposed at the first end portion or the second end portion, wherein the preset force is used to apply to the first thrust bearing; The first shaft is not provided with a thrust bearing, a third anti-collision structure is provided between an end of the third portion away from the fourth portion and the housing of the compressor, and a fourth anti-collision structure is provided between an end of the fourth portion away from the third portion and the housing of the compressor; The first part and / or the second part are integrally formed with the first shaft, and the third part and the fourth part are rotatable around the second shaft.

23. A compressor, characterized in that: include: a first rotor rotatable along a first axis, the first rotor comprising a first portion and a second portion; a first shaft body, carrying the first part and the second part, the first shaft body having a first end and a second end oppositely disposed; a second rotor rotatable along a second axis, the second rotor comprising a third portion meshing with the first portion and a fourth portion meshing with the second portion; a second shaft body, carrying the third portion and the fourth portion, the second shaft body having a third end portion and a fourth end portion that are oppositely disposed; During the rotation of the first rotor and the second rotor, there is a preset force in the direction of the first end toward the second end or the direction of the second end toward the first end; The compressor further includes an oil circuit system, wherein the pressure exerted by the oil circuit system on the first end is lower than the pressure exerted by the oil circuit system on the second end, so that the first rotor and the second rotor have the preset force during rotation; or The pressure exerted by the oil system on the third end is less than the pressure exerted by the oil system on the fourth end, so that the first rotor and the second rotor have the preset force during their rotation.

24. The compressor according to claim 23, characterized in that Also includes: A first thrust bearing is provided at the first end portion or the second end portion, and the preset force is used to apply to the first thrust bearing.

25. The compressor according to claim 23, characterized in that The first shaft is not provided with a thrust bearing, and the first part and the second part are both made of non-metallic materials.

26. The compressor according to claim 23, characterized in that The first shaft is not provided with a thrust bearing, a first anti-collision structure is provided between an end of the first part away from the second part and the housing of the compressor, and a second anti-collision structure is provided between an end of the second part away from the first part and the housing of the compressor.

27. The compressor according to claim 23, characterized in that Also includes: a first thrust bearing, disposed at the first end portion or the second end portion; The second thrust bearing is arranged at the third end portion or the fourth end portion, and the preset force is used to apply to the first thrust bearing and the second thrust bearing.

28. The compressor according to claim 23, characterized in that Also includes: a first thrust bearing, disposed at the first end portion or the second end portion, wherein the preset force is used to apply to the first thrust bearing; Wherein, the second shaft is not provided with a thrust bearing, and the third part and the fourth part are made of non-metallic materials; The first part and / or the second part are integrally formed with the first shaft, and the third part and the fourth part are rotatable around the second shaft.

29. The compressor according to claim 23, characterized in that Also includes: a first thrust bearing, disposed at the first end portion or the second end portion, wherein the preset force is used to apply to the first thrust bearing; The first shaft is not provided with a thrust bearing, a third anti-collision structure is provided between an end of the third portion away from the fourth portion and the housing of the compressor, and a fourth anti-collision structure is provided between an end of the fourth portion away from the third portion and the housing of the compressor; The first part and / or the second part are integrally formed with the first shaft, and the third part and the fourth part are rotatable around the second shaft.

30. An air conditioner, characterized in that: Comprising the compressor according to any one of claims 1-29.

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