CN215256795U - Rotor subassembly, compressor and air conditioner - Google Patents

Abstract

The embodiment of the utility model provides a rotor subassembly, compressor and air conditioner, the rotor subassembly includes first rotor, second rotor, third rotor and fourth rotor, and first rotor and the coaxial setting of second rotor, and the screw thread direction of turning to of first rotor and second rotor is opposite; the first rotor comprises a first tooth surface, the first tooth surface is meshed with the third rotor, the second rotor comprises a second tooth surface, the second tooth surface is meshed with the fourth rotor, and the surface area of the first tooth surface is different from that of the second tooth surface, so that the first rotor and the second rotor jointly form axial force in a preset direction. In the rotor component, only one end of the first rotating shaft is required to be provided with the thrust bearing, and the two ends of the first rotating shaft are not required to be respectively provided with the thrust bearing, so that the first rotating shaft can be limited to move along the axis direction of the first rotating shaft, the stability of the rotor component in the operation process is improved, the stability of the compressor in the operation process is also improved, and meanwhile, the number of the thrust bearings can be reduced.

Description

Rotor subassembly, compressor and air conditioner

Technical Field

The utility model relates to a fluid machinery technical field, in particular to rotor subassembly, compressor and air conditioner.

Background

The screw compressor has the characteristics of compactness, high efficiency, reliable performance, strong adaptability and the like, is widely applied to aerodynamic force, refrigeration air conditioners and various process flows, and has continuously expanded market share.

In recent years, with the development of technology, researchers have paid attention to multi-rotor screw compressors. The four-rotor screw compressor is a brand new screw compressor structure. During operation of the four-rotor screw compressor, two forces in opposite directions are generated on the male rotor shaft. The magnitude of the two acting forces is not constant, but changes along with the actual working environment, so that the stress condition of the male rotor shaft is unstable, and the operation process of the self-rotor screw compressor is unstable.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides a rotor subassembly, compressor and air conditioner can improve the stability of compressor operation in-process to reduce footstep bearing's quantity.

The embodiment of the utility model provides a rotor assembly, including first rotor, second rotor, third rotor and fourth rotor, first rotor with the coaxial setting of second rotor, and the screw thread direction of turning of first rotor with the second rotor is opposite;

the first rotor comprises a first tooth surface, the first tooth surface is meshed with the third rotor to drive the third rotor to rotate, the second rotor comprises a second tooth surface, the second tooth surface is meshed with the fourth rotor to drive the fourth rotor to rotate, and the surface area of the first tooth surface is different from that of the second tooth surface, so that the first rotor and the second rotor jointly form axial force in a preset direction.

In some embodiments, the shape of the first tooth surface is different from the shape of the second tooth surface such that the surface area of the first tooth surface is different from the surface area of the second tooth surface.

In some embodiments, a length of the first rotor in an axial direction is different from a length of the second rotor in the axial direction, or an outer diameter of the first rotor is different from an outer diameter of the second rotor, or a gear density of the first tooth surface is different from a gear density of the second tooth surface, or a gear thickness of the first tooth surface is different from a gear thickness of the second tooth surface.

In some embodiments, the profile of the first rotor faces is different from the profile of the second rotor faces.

In some embodiments, the number of teeth of the first rotor is different from the number of teeth of the second rotor.

In some embodiments, the first rotor and the third rotor have a first gear ratio, the second rotor and the fourth rotor have a second gear ratio, and the first gear ratio is the same as the second gear ratio.

In some embodiments, the first and third rotors have a first gear ratio, the second and fourth rotors have a second gear ratio, and the first gear ratio is different from the second gear ratio.

In some embodiments, the rotational speed of the third rotor is different from the rotational speed of the fourth rotor.

In some embodiments, the first rotor and the second rotor each include a plurality of gears, and the shape of the gears of the first rotor is different from the shape of the gears of the second rotor.

In some embodiments, the third rotor includes a third tooth surface that meshes with the first tooth surface, the fourth rotor includes a fourth tooth surface that meshes with the second tooth surface, and the third tooth surface has a shape different from a shape of the fourth tooth surface.

In some embodiments, a spacer is disposed between the third rotor and the fourth rotor to prevent the third rotor from engaging the second rotor and to prevent the fourth rotor from engaging the first rotor.

The embodiment of the utility model provides a still provide a compressor, including above-mentioned arbitrary rotor subassembly.

The embodiment of the utility model provides a still provide an air conditioner, including above-mentioned compressor.

The embodiment of the utility model provides an among the rotor subassembly, the superficial area through with first flank of tooth sets up to the difference with the superficial area of second flank of tooth, the resultant force direction that can make first pivot receive is invariable, consequently only need set up footstep bearing in the one end of first pivot, and need not set up footstep bearing respectively at the both ends of first pivot, can restrict the removal of first pivot along self axis direction through the footstep bearing that sets up in first pivot one end, thereby improve the stability of rotor subassembly in the operation process, also improve the stability of compressor in the operation process, simultaneously can also reduce footstep bearing's quantity.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.

Fig. 1 is a first schematic structural diagram of a rotor assembly according to an embodiment of the present invention.

Fig. 2 is a second schematic structural diagram of the rotor assembly according to an embodiment of the present invention.

Fig. 3 is a first schematic structural diagram of a first rotating shaft portion of a rotor assembly according to an embodiment of the present invention.

Fig. 4 is a schematic structural diagram of a second rotating shaft portion of the rotor assembly according to an embodiment of the present invention.

Fig. 5 is a second schematic structural diagram of the first shaft portion of the rotor assembly according to the embodiment of the present invention.

Fig. 6 is a third schematic structural view of the first shaft portion of the rotor assembly according to the embodiment of the present invention.

Fig. 7 is a fourth schematic structural diagram of the first rotating shaft portion of the rotor assembly according to the embodiment of the present invention.

Fig. 8 is a schematic end-face profile of the first rotor of the rotor assembly according to an embodiment of the present invention.

Fig. 9 is a schematic end-face profile of a second rotor of the rotor assembly according to an embodiment of the present invention.

Fig. 10 is a third structural schematic diagram of a rotor assembly according to an embodiment of the present invention.

Each reference numeral represents:

a rotor assembly 100; a first shaft portion 10; a second spindle portion 20;

a first rotating shaft 11; a first rotor 12; a second rotor 13; a first rolling bearing 14; a second rolling bearing 15; a first thrust bearing 16; the first tooth surface 121; a first gear 122; a first end profile 123; a second tooth surface 131; a second gear 132; a second end face profile 133;

a second rotating shaft 21; a third rotor 22; a fourth rotor 23; a third rolling bearing 24; a fourth rolling bearing 25; a second thrust bearing 26; a spacer 27; the third tooth surface 221; the fourth tooth face 231;

an air inlet 31; a first exhaust port 32; a second exhaust port 33; a first cavity 41; a second cavity 42;

a first direction X1; a second direction X2; a first length L1; a second length L2; a first outer diameter D1; a second outside diameter D2.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without creative efforts belong to the protection scope of the present invention.

An embodiment of the utility model provides a rotor subassembly. Referring to fig. 1, fig. 1 is a schematic view illustrating a first structure of a rotor assembly 100 according to an embodiment of the present invention. Among other things, the rotor assembly 100 may be applied to a compressor, such as a screw compressor, a scroll compressor, and the like.

The rotor assembly 100 includes a first shaft portion 10 and a second shaft portion 20.

In the description of the present invention, it is to be understood that terms such as "first", "second", and the like are used merely for distinguishing between similar elements and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated.

The first shaft portion 10 includes a first shaft 11, a first rotor 12, a second rotor 13, and a first thrust bearing 16. The first rotor 12 and the second rotor 13 are coaxially disposed on the first shaft 11. A first thrust bearing 16 is provided at one end of the first rotating shaft 11.

For example, the first rotor 12 and the second rotor 13 are both sleeved on the first rotating shaft 11 and fixedly connected or slidably connected with the first rotating shaft 11, so that the first rotor 12 and the first rotating shaft 11, and the second rotor 13 and the first rotating shaft 11 cannot rotate relatively. For example, the first rotor 12 and the first rotating shaft 11 may be clamped to each other to achieve relative fixation, and the second rotor 13 and the first rotating shaft 11 may also be clamped to each other to achieve relative fixation. In some embodiments, the first rotor 12, the second rotor 13, and the first rotating shaft 11 may be integrally formed, for example, by injection molding.

The first thrust bearing 16 is provided at one end of the first shaft 11, and abuts against an end portion of the first shaft 11 to restrict movement of the first shaft 11 in its own axial direction.

The first shaft 11 is adapted to rotate about its own axis under the drive of a driving device (not shown), such as a motor. It can be understood that, when the driving device drives the first rotating shaft 11 to rotate, the first rotating shaft 11 and the driving device may be fixedly connected, for example, the first rotating shaft 11 may be fixedly connected with a motor. Since the first rotor 12 and the first rotating shaft 11 and the second rotor 13 and the first rotating shaft 11 cannot rotate relatively, the first rotating shaft 11 can drive the first rotor 12 and the second rotor 13 to rotate synchronously when rotating.

The second spindle portion 20 includes a second spindle 21, a third rotor 22, a fourth rotor 23, and a second thrust bearing 26. The third rotor 22 and the fourth rotor 23 are coaxially disposed on the second rotating shaft 21. A second thrust bearing 26 is provided at one end of the second rotating shaft 21.

For example, the third rotor 22 and the fourth rotor 23 are both sleeved on the second rotating shaft 21 and are rotatably connected with the second rotating shaft 21. The third rotor 22 is slidable along the second rotating shaft 21, and the fourth rotor 23 is also slidable along the second rotating shaft 21.

The second thrust bearing 26 is provided at one end of the second rotating shaft 21 and abuts against an end of the second rotating shaft 21 to restrict movement of the second rotating shaft 21 in the direction of its own axis.

The first rotor 12 is engaged with the third rotor 22, and the third rotor 22 is driven to rotate when the first rotor 12 rotates. The second rotor 13 is engaged with the fourth rotor 23, and the fourth rotor 23 is driven to rotate when the second rotor 13 rotates. Therefore, the first rotor 12 and the second rotor 13 may be referred to as a male rotor, a driving rotor, or the like, and the third rotor 22 and the fourth rotor 23 may be referred to as a female rotor, a driven rotor, or the like.

An air inlet 31 is formed between the meshing part of the first rotor 12 and the third rotor 22 and the meshing part of the second rotor 13 and the fourth rotor 23. The first rotor 12 meshes with the third rotor 22 at an end remote from the inlet port 31 to form a first exhaust port 32. The second rotor 13 and the fourth rotor 23 are engaged with each other to form a second exhaust port 33 at an end thereof remote from the intake port 31.

Referring to fig. 2, fig. 2 is a second structural schematic diagram of the rotor assembly 100 according to an embodiment of the present invention.

Wherein the first rotor 12 forms a first cavity 41 when engaged with the third rotor 22. The second rotor 13 forms a second cavity 42 when engaged with the fourth rotor 23. Both the first cavity 41 and the second cavity 42 may contain a fluid, for example air.

With continued reference to fig. 1, in the embodiment of the present invention, the first rotor 12 and the second rotor 13 have opposite screw threads. For example, the threads of the first rotor 12 may be threaded in a forward direction and the threads of the second rotor 13 may be threaded in a reverse direction. Alternatively, the threads of the first rotor 12 may be counter-threaded and the threads of the second rotor 13 may be forward-threaded.

It will be appreciated that the thread directions of the third rotor 22 and the fourth rotor 23 are opposite, since the first rotor 12 meshes with the third rotor 22 and the second rotor 13 meshes with the fourth rotor 23. Therefore, the screw thread directions of the first rotor 12 and the fourth rotor 23 are the same, and the screw thread directions of the second rotor 13 and the third rotor 22 are also the same.

During operation of the rotor assembly 100, a driving device (not shown) drives the first rotating shaft 11 to rotate. The first rotating shaft 11 drives the first rotor 12 and the second rotor 13 to rotate synchronously. The first rotor 12 drives the third rotor 22 to rotate by meshing. The second rotor 13 drives the fourth rotor 23 to rotate by meshing. During the meshing rotation of the first rotor 12 and the third rotor 22, air is sucked in through the air inlet 31, and the sucked air is compressed in the first cavity 41 by the first rotor 12 and the third rotor 22 and then discharged through the first air outlet 32. During the meshing rotation of the second rotor 13 and the fourth rotor 23, air is also sucked in through the air inlet 31, and then the sucked air is compressed in the second cavity 42 by the second rotor 13 and the fourth rotor 23 and then discharged through the second air outlet 33.

It is understood that, in practical applications, the process of sucking air during the engagement rotation of the first rotor 12 and the third rotor 22 and the process of sucking air during the engagement rotation of the second rotor 13 and the fourth rotor 23 may be embodied as a single process. That is, during the operation of the rotor assembly 100, the air inlet 31 sucks air, and then the sucked air is compressed and discharged through the first and second exhaust ports 32 and 33, respectively.

The first exhaust port 32 exhausts air in the direction X1 shown in fig. 1. Due to the interaction force, the expelled air will create a reaction force in the direction X2 against the rotor assembly 100. Since the first rotating shaft portion 10 is a driving portion of the entire rotor assembly 100, a reaction force mainly acts on the first rotating shaft 11. Similarly, when the second air outlet 33 discharges air in the direction X2, the discharged air will generate a reaction force in the direction X1 on the rotor assembly 100, and the reaction force is mainly exerted on the first rotating shaft 11. Therefore, the reaction force of the air discharged from the first exhaust port 32 and the reaction force of the air discharged from the second exhaust port 33 partially cancel each other out.

Due to manufacturing tolerances, it is difficult to ensure that the first rotor 12 is identical to the second rotor 13, and it is difficult to ensure that the third rotor 22 is identical to the fourth rotor 23. Also, the differences between the first rotor 12, the second rotor 13, the third rotor 22, and the fourth rotor 23 are not completely the same among different products produced. Therefore, in the different products produced, there are cases where the reaction force of the air discharged from the first exhaust port 32 is greater than the reaction force of the air discharged from the second exhaust port 33, so that the resultant force applied to the first rotor shaft 11 is in the direction X2, that is, toward the second rotor 13 and the fourth rotor 23; in some cases, the reaction force of the air discharged from the first exhaust port 32 is smaller than the reaction force of the air discharged from the second exhaust port 33, so that the resultant force applied to the first rotor shaft 11 is in the direction X1, i.e., toward the first rotor 12 and the third rotor 22; in some cases, the reaction force of the air discharged from the first exhaust port 32 is exactly equal to the reaction force of the air discharged from the second exhaust port 33, so that the resultant force applied to the first rotating shaft 11 is exactly zero.

Therefore, in practical applications, the direction of the resultant force applied to the first rotating shaft 11 during the operation of different rotor assemblies 100 produced is uncertain, and therefore, the first rotating shaft 11 may move in the uncertain direction.

Referring to fig. 3 and fig. 4, fig. 3 is a first schematic structural diagram of the first rotating shaft portion 10 of the rotor assembly provided by the embodiment of the present invention, and fig. 4 is a schematic structural diagram of the second rotating shaft portion 20 of the rotor assembly provided by the embodiment of the present invention.

Wherein the first rotor 12 comprises a first tooth flank 121, the second rotor 13 comprises a second tooth flank 131, the third rotor 22 comprises a third tooth flank 221 and the fourth rotor 23 comprises a fourth tooth flank 231. When the first rotor 12 is engaged with the third rotor 22, specifically, the first tooth flank 121 is engaged with the third rotor 22, for example, the first tooth flank 121 is engaged with the third tooth flank 221. When the second rotor 13 is engaged with the fourth rotor 23, specifically, the second tooth face 131 is engaged with the fourth rotor 23, for example, the second tooth face 131 is engaged with the fourth tooth face 231.

In the embodiment of the present invention, in order to determine the resultant force direction received by the first rotating shaft 11 during the operation of the rotor assembly 100, the surface area of the first tooth surface 121 may be different from the surface area of the second tooth surface 131, so that the first rotor 12 and the second rotor 13 jointly form the axial force in the preset direction. For example, the axial force directed in the X1 direction may be formed together, or the axial force directed in the X2 direction may be formed together.

It can be understood that, since the surface area of the first tooth surface 121 is different from the surface area of the second tooth surface 131, the amount of air compressed by the first and third rotors 12 and 22 is different from the amount of air compressed by the second and fourth rotors 13 and 23 per unit time. Thus, the reaction force of the air discharged from the first exhaust port 32 and the reaction force of the air discharged from the second exhaust port 33 are also different. By properly setting the surface area of the first tooth surface 121 and the surface area of the second tooth surface 131, the resultant direction of the two reaction forces can be made constant, thereby collectively forming an axial force toward a preset direction on the first rotating shaft 11.

Furthermore, it will be appreciated that the volume of the cavity formed by the meshing of the two rotors is related to the surface area of the meshing surfaces. Therefore, when the surface area of the first tooth surface 121 is different from the surface area of the second tooth surface 131, the volume of the first cavity 41 and the volume of the second cavity 42 are also affected, so that the volume of the first cavity 41 is different from the volume of the second cavity 42. Due to the different volumes of the two cavities, the amount of compressed air per unit time is naturally different. Therefore, by properly setting the volume of the first cavity 41 and the volume of the second cavity 42, the resultant direction of the two reaction forces can be made constant, so that the axial force toward the preset direction is formed on the first rotating shaft 11 together.

In the embodiment of the present invention, by setting the surface area of the first tooth surface 121 and the surface area of the second tooth surface 131 to be different, the resultant force direction received by the first rotating shaft 11 can be constant, for example, in different product rotor assemblies 100, the resultant force always faces the X1 direction (or always faces the X2 direction). Therefore, in the rotor assembly 100, only one end of the first rotating shaft 11 needs to be provided with a thrust bearing, and the two ends of the first rotating shaft 11 do not need to be provided with thrust bearings, respectively, for example, the thrust bearings are arranged in the direction of the resultant force applied to the first rotating shaft 11, such as the first thrust bearing 16, and the first thrust bearing 16 can limit the movement of the first rotating shaft 11 along the axis direction thereof, so that the stability of the rotor assembly 100 in the operation process is improved, that is, the stability of the compressor in the operation process is improved, and the number of the thrust bearings can be reduced.

In some embodiments, the shape of the first tooth surface 121 may be configured to be different from the shape of the second tooth surface 131, such that the surface area of the first tooth surface 121 is different from the surface area of the second tooth surface 131, while also providing a different volume of the first cavity 41 than the volume of the second cavity 42. It is understood that since the first tooth surface 121 of the first rotor 12 is engaged with the third tooth surface 221 of the third rotor 22 and the second tooth surface 131 of the second rotor 13 is engaged with the fourth tooth surface 231 of the fourth rotor 23, the shape of the first tooth surface 121 is different from that of the second tooth surface 131, and the shape of the third tooth surface 221 is different from that of the fourth tooth surface 231.

In practice, the shape of the first tooth surface 121 is different from the shape of the second tooth surface 131 in various ways.

For example, referring to fig. 5, fig. 5 is a second structural schematic view of the first shaft portion 10 of the rotor assembly according to the embodiment of the present invention.

The length of the first rotor 12 in the axial direction is L1, and the length of the second rotor 13 in the axial direction is L2. It may be provided that L1 is different from L2 so that the shape of the first tooth face 121 is different from the shape of the second tooth face 131. For example, L1 may be smaller than L2, such that the surface area of the first tooth flank 121 is smaller than the surface area of the second tooth flank 131, and also such that the volume of the first cavity 41 is smaller than the volume of the second cavity 42.

For another example, referring to fig. 6, fig. 6 is a third structural schematic diagram of the first shaft portion 10 of the rotor assembly according to the embodiment of the present invention.

The first rotor 12 has an outer diameter D1, and the second rotor 13 has an outer diameter D2. It may be provided that D1 is different from D2 so that the shape of the first tooth face 121 is different from the shape of the second tooth face 131. For example, D1 may be smaller than D2, such that the surface area of the first tooth flank 121 is smaller than the surface area of the second tooth flank 131, and also such that the volume of the first cavity 41 is smaller than the volume of the second cavity 42.

For another example, referring to fig. 7, fig. 7 is a fourth structural schematic diagram of the first shaft portion 10 of the rotor assembly according to the embodiment of the present invention.

The first rotor 12 includes a plurality of first gears 122, and the plurality of first gears 122 constitute a first tooth surface 121. The second rotor 13 includes a plurality of second gears 132, and the plurality of second gears 132 constitute a second tooth surface 131. It will be appreciated that the first plurality of gears 122 may form threads on the surface of the first rotor 12 and the second plurality of gears 132 may form threads on the surface of the second rotor 13.

The gear density of the first tooth surface 121 is different from that of the second tooth surface 131, that is, the density of the plurality of first gears 122 is different from that of the plurality of second gears 132, so that the shape of the first tooth surface 121 is different from that of the second tooth surface 131. For example, the gear density of the first tooth surface 121 may be less than the gear density of the second tooth surface 131, such that the surface area of the first tooth surface 121 is less than the surface area of the second tooth surface 131, and also such that the volume of the first cavity 41 is less than the volume of the second cavity 42.

In some embodiments, it may be set that the gear thickness of the first tooth surface 121 is different from that of the second tooth surface 131, that is, the thickness of the first gear 122 is different from that of the second gear 132, and it is also possible to make the shape of the first tooth surface 121 different from that of the second tooth surface 131. For example, the thickness of the first gear 122 may be set to be smaller than that of the second gear 132, so that the surface area of the first tooth surface 121 is smaller than that of the second tooth surface 131, and so that the volume of the first cavity 41 is smaller than that of the second cavity 42.

In some embodiments, referring to fig. 8 and fig. 9 simultaneously, fig. 8 is an end face profile schematic diagram of the first rotor 12 of the rotor assembly provided by the embodiment of the present invention, and fig. 9 is an end face profile schematic diagram of the second rotor 13 of the rotor assembly provided by the embodiment of the present invention.

The first rotor 12 has a first end profile 123. The first end profile 123 can be understood as the shape of a cross section of the first rotor 12 along a direction perpendicular to the axis of the first rotor 12. The second rotor 13 has a second end profile 133. The second end profile 133 can be understood as the shape of the second rotor 13 in a cross section perpendicular to the axis of the second rotor 13.

The end profile 123 of the first rotor 12 is different from the end profile 133 of the second rotor 13, and the surface area of the first tooth surface 121 may be different from the surface area of the second tooth surface 131, and the volume of the first cavity 41 may be different from the volume of the second cavity 42.

For example, in some embodiments, the number of teeth of the first rotor 12 is different from the number of teeth of the second rotor 13, such that the end profile 123 of the first rotor 12 is different from the end profile 133 of the second rotor 13. For example, as shown in fig. 8, the first rotor 12 may include 5 first gears 122; as shown in fig. 9, the second rotor 13 may include 6 second gears 132. Thus, the number of teeth of the first rotor 12 is made different from the number of teeth of the second rotor 13.

In some embodiments, the first rotor 12 and the third rotor 22 have a first gear ratio, and the first rotor 12 and the third rotor 22 mesh to drive the third rotor 22 to rotate. The second rotor 13 and the fourth rotor 23 have a second gear ratio, and the second rotor 13 and the fourth rotor 23 are meshed to drive the fourth rotor 23 to rotate. The first gear ratio and the second gear ratio may be the same or different.

It will be appreciated that the first rotor 12 and the second rotor 13 are rotating synchronously, i.e. the rotational speed of the first rotor 12 is the same as the rotational speed of the second rotor 13. Therefore, when the first gear ratio is the same as the second gear ratio, the rotational speed of the third rotor 22 and the rotational speed of the fourth rotor 23 are also the same; when the first gear ratio is different from the second gear ratio, the rotational speed of the third rotor 22 is also different from the rotational speed of the fourth rotor 23.

It can be understood that, when the rotation speed of the third rotor 22 is the same as that of the fourth rotor 23, the third rotor 22 and the fourth rotor 23 also rotate synchronously, so that the rotation between the third rotor 22 and the fourth rotor 23 is smoother, and therefore, the smoothness of the operation of the rotor assembly 100 can be improved.

When the rotation speed of the third rotor 22 is different from that of the fourth rotor 23, the third rotor 22 and the fourth rotor 23 do not rotate synchronously. Therefore, the air exhausting by meshing the first rotor 12 with the third rotor 22 and the air exhausting by meshing the second rotor 13 with the fourth rotor 23 are not performed simultaneously. It will be appreciated that venting produces noise, and that venting both pairs of rotors simultaneously adds to the noise of venting both pairs of rotors, thereby increasing the overall noise of the rotor assembly 100. The third rotor 22 and the fourth rotor 23 rotate asynchronously, so that the noises generated when the two pairs of rotors exhaust air are not superposed, and the overall noise generated when the rotor assembly 100 operates can be reduced.

In some embodiments, the shape of the gear of the first rotor 12 may be different from the shape of the gear of the second rotor 13, that is, the shape of the first gear 122 may be different from the shape of the second gear 132, and as shown in fig. 8 and 9, the end profile 123 of the first rotor 12 may be different from the end profile 133 of the second rotor 13.

The above-described plurality of embodiments in which the shape of the first tooth surface 121 and the shape of the second tooth surface 131 are different from each other may be combined with each other without causing any conflict. For example, it may be set that the length L1 of the first rotor 12 is smaller than the length L2 of the second rotor 13, and the outer diameter D1 of the first rotor 12 is smaller than the outer diameter D2 of the second rotor 13; it may be also provided that the outer diameter D1 of the first rotor 12 is smaller than the outer diameter D2 of the second rotor 13, and the shape of the first gear 122 is different from the shape of the second gear 132, and so on.

In some embodiments, referring to fig. 10, fig. 10 is a third structural schematic diagram of a rotor assembly 100 according to an embodiment of the present invention.

Wherein a spacer 27 is provided between the third rotor 22 and the fourth rotor 23. The spacers 27 may be structures such as bumps, pads, and the like. The spacer 27 may be separately sleeved on the second rotating shaft 21, may be integrally formed with the second rotating shaft 21, and may also be integrally formed with the third rotor 22 or the fourth rotor 23.

It will be appreciated that when the first rotor 12 is rotated in mesh with the third rotor 22 to compress and discharge air, the reaction force of the air on the rotor assembly 100 acts directly on the first rotor 12 and the third rotor 22. Therefore, the third rotor 22 is moved in the axial direction by the reaction force of the air. Similarly, when the second rotor 13 is rotated in mesh with the fourth rotor 23 to compress air and discharge the air, the reaction force of the air generated in the rotor assembly 100 directly acts on the second rotor 13 and the fourth rotor 23. Therefore, the fourth rotor 23 is also moved in the axial direction by the reaction force of the air.

In addition, the interaction between the compressor and the air may change during the process of starting, stopping, increasing the speed, decreasing the speed, etc. Therefore, the interaction force between the rotor assembly 100 and the air is not constant. For example, the reaction force of the third rotor 22 to the air may become large or small, and even the direction of the reaction force may be changed. Similarly, the reaction force of the air on the fourth rotor 23 may become large or small, and even the direction of the reaction force may change. Therefore, the moving directions of the third rotor 22 and the fourth rotor 23 in the axial direction are not fixed. For example, the third rotor 22 may move in a direction away from the fourth rotor 23, and may also move in a direction toward the fourth rotor 23; the fourth rotor 23 may be moved in a direction away from the third rotor 22 and may be moved in a direction toward the third rotor 22.

When the third rotor 22 and the fourth rotor 23 move in the axial direction, if the movement is not limited, the third rotor 22 may be engaged with the second rotor 13, so that the third rotor 22 and the second rotor 13 may be locked, and the compressor may malfunction; it is also possible to cause the fourth rotor 23 to engage with the first rotor 12, resulting in the fourth rotor 23 seizing with the first rotor 11, which in turn causes the compressor to malfunction.

On the other hand, it is understood that the third rotor 22 and the fourth rotor 23 are both limited in moving distance when moving in the axial direction. Therefore, a spacer 27 is provided between the third rotor 22 and the fourth rotor 23, and the movement of the third rotor 22 and the fourth rotor 23 can be restricted by the spacer 27. For example, when the third rotor 22 moves toward the fourth rotor 23, the spacer 27 may prevent engagement between the third rotor 22 and the second rotor 13 to avoid a seizure. When the fourth rotor 23 moves toward the third rotor 22, the spacer 27 can prevent the engagement between the fourth rotor 23 and the first rotor 12 and also prevent the occurrence of the seizure. Therefore, by providing the spacer 27, the occurrence of seizure between the third rotor 22 and the second rotor 13 and seizure between the fourth rotor 23 and the first rotor 12 can be reduced, thereby reducing the occurrence of compressor failure and improving the stability of the compressor operation.

In some embodiments, with continued reference to fig. 1, the first shaft portion 10 further comprises a first rolling bearing 14 and a second rolling bearing 15. The first rolling bearing 14 and the second rolling bearing 15 are both sleeved on the first rotating shaft 11 and are rotatably connected with the first rotating shaft 11, so that the first rolling bearing 14 and the first rotating shaft 11 and the second rolling bearing 15 and the first rotating shaft 11 can rotate relatively.

Therein, it is understood that the first rolling bearing 14, the first rotor 12, the second rotor 13, the second rolling bearing 15 and the first thrust bearing 16 may be provided in sequence. For example, the first rotor 12 and the second rotor 13 may abut and be located between the first rolling bearing 14 and the second rolling bearing 15. The first thrust bearing 16 may abut against the second rolling bearing 15.

It will also be understood that the first shaft 11, when rotating, can rotate inside the first rolling bearing 14, the second rolling bearing 15. The outer rings of the first rolling bearing 14 and the second rolling bearing 15 may be fixed, and the inner ring may be fixed relative to the first rotating shaft 11. Therefore, by providing the first rolling bearing 14 and the second rolling bearing 15, the smoothness of the rotation of the first rotating shaft 11 can be improved.

The second spindle portion 20 further includes a third rolling bearing 24 and a fourth rolling bearing 25. The third rolling bearing 24 and the fourth rolling bearing 25 are sleeved on the second rotating shaft 21 and rotatably connected with the second rotating shaft 21, so that the third rolling bearing 24 and the second rotating shaft 21, and the fourth rolling bearing 25 and the second rotating shaft 21 can rotate relatively.

It is understood that the third rolling bearing 24, the third rotor 22, the fourth rotor 23, the fourth rolling bearing 25 and the second thrust bearing 26 may be provided in this order. For example, the third rotor 22 and the fourth rotor 23 may abut against each other or may be spaced apart from each other. The third rotor 22 and the fourth rotor 23 are located between the third rolling bearing 24 and the fourth rolling bearing 25. The second thrust bearing 26 may abut against the fourth rolling bearing 25.

The embodiment of the utility model provides a still provide a compressor.

The compressor includes the rotor assembly 100 described in any of the above embodiments. It will be appreciated that the compressor may also include a housing and a motor. The housing forms the overall outer contour of the compressor and houses the functional components of the rotor assembly 100, the motor, etc. The rotor assembly 100 is rotatably disposed within the housing. The motor is arranged in the shell. The motor is coupled to the rotor assembly 100, for example, may be coupled to the first rotating shaft 11 of the rotor assembly 100. The motor is used to drive the rotor assembly 100 to rotate.

The embodiment of the utility model provides a still provide an air conditioner, including above-mentioned compressor.

It is right above the embodiment of the utility model provides a rotor subassembly, compressor and air conditioner introduce in detail. The principles and embodiments of the present invention have been explained herein using specific examples, which are provided only to assist in understanding the present invention. Meanwhile, for those skilled in the art, according to the idea of the present invention, there may be some changes in the specific implementation and application scope, and to sum up, the content of the present specification should not be understood as a limitation to the present invention.

Claims (13)

1. A rotor assembly is characterized by comprising a first rotor, a second rotor, a third rotor and a fourth rotor, wherein the first rotor and the second rotor are coaxially arranged, and the thread directions of the first rotor and the second rotor are opposite;

the first rotor comprises a first tooth surface, the first tooth surface is meshed with the third rotor to drive the third rotor to rotate, the second rotor comprises a second tooth surface, the second tooth surface is meshed with the fourth rotor to drive the fourth rotor to rotate, and the surface area of the first tooth surface is different from that of the second tooth surface, so that the first rotor and the second rotor jointly form axial force in a preset direction.

2. The rotor assembly of claim 1 wherein the shape of the first tooth surface is different than the shape of the second tooth surface such that the surface area of the first tooth surface is different than the surface area of the second tooth surface.

3. The rotor assembly of claim 2 wherein the first rotor has a length in the axial direction that is different from a length in the axial direction of the second rotor, or the first rotor has an outer diameter that is different from an outer diameter of the second rotor, or the first tooth flank has a gear density that is different from a gear density of the second tooth flank, or the first tooth flank has a gear thickness that is different from a gear thickness of the second tooth flank.

4. A rotor assembly as claimed in any one of claims 1 to 3 wherein the profile of the end face of the first rotor is different to the profile of the end face of the second rotor.

5. The rotor assembly of claim 4 wherein the first rotor has a different number of teeth than the second rotor.

6. The rotor assembly of claim 5 wherein the first rotor and the third rotor have a first gear ratio, the second rotor and the fourth rotor have a second gear ratio, and the first gear ratio is the same as the second gear ratio.

7. The rotor assembly of claim 5 wherein the first rotor and the third rotor have a first gear ratio, the second rotor and the fourth rotor have a second gear ratio, the first gear ratio being different than the second gear ratio.

8. The rotor assembly of claim 7 wherein the rotational speed of the third rotor is different from the rotational speed of the fourth rotor.

9. The rotor assembly of claim 4 wherein the first rotor, the second rotor each include a plurality of gears, the gear shape of the first rotor being different from the gear shape of the second rotor.

10. The rotor assembly of any one of claims 1 to 3 wherein the third rotor includes a third tooth surface, the third tooth surface meshing with the first tooth surface, the fourth rotor includes a fourth tooth surface, the fourth tooth surface meshing with the second tooth surface, the third tooth surface having a shape different from a shape of the fourth tooth surface.

11. A rotor assembly as claimed in any one of claims 1 to 3, wherein a spacer is provided between the third rotor and the fourth rotor to prevent the third rotor from engaging the second rotor and the fourth rotor from engaging the first rotor.

12. A compressor comprising a rotor assembly as claimed in any one of claims 1 to 11.

13. An air conditioner characterized by comprising the compressor of claim 12.

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