Compressor and heating and ventilation equipment

Abstract

The utility model relates to the technical field of heating and ventilation equipment, in particular to a compressor and heating and ventilation equipment. The compressor comprises an impeller, a magnetic suspension bearing, a main shaft and a sealing device. One end of the spindle is in transmission connection with the magnetic suspension bearing, and the other end of the spindle is connected with the impeller and can drive the impeller to rotate; the sealing device comprises a main body part and a plurality of sealing teeth, the main body part rotatably penetrates through the main body part, the main body part and the impeller are oppositely arranged in the first direction, the sealing teeth are arranged on the end face, facing the impeller, of the main body part, an abradable layer is arranged on the outer surface of at least one sealing tooth, and the abradable layer can be abraded when colliding with the impeller; the first direction is consistent with the axial direction of the main shaft. According to the compressor, the probability of instability after collision of the impeller and the sealing device can be reduced, so that a gap between the sealing device and the impeller can be reduced, the leakage amount between the sealing device and the impeller can be reduced, and the energy efficiency of the compressor can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of HVAC equipment, in particular to a compressor and HVAC equipment. Background Art

[0002] Magnetic bearings have been gradually applied to turbine machinery, vacuum cleaning, flywheel energy storage and other fields due to their advantages such as high speed, oil-free, energy saving and low noise.

[0003] In the prior art, the magnetic bearing of the compressor is connected to the main shaft through a sealing structure to seal the impeller on the main shaft. When the compressor is working, the main shaft is in a suspended state. The friction between the sealing structure and the impeller will cause the main shaft in the suspended state to become unstable, thereby causing the magnetic suspension rotor to become unstable. In order to reduce the probability of friction between the sealing structure and the impeller, the prior art increases the gap between the sealing structure and the impeller to reduce the probability of friction between the seal and the impeller.

[0004] However, increasing the gap between the sealing structure and the impeller will lead to increased leakage between the sealing structure and the impeller, resulting in poor energy efficiency of the compressor. Utility Model Content

[0005] The purpose of the utility model is to at least solve the problem in the prior art that the gap between the sealing structure and the impeller is large, resulting in large leakage and poor compressor energy efficiency. This purpose is achieved by:

[0006] The first aspect of the utility model proposes a compressor, including an impeller, a magnetic bearing, a main shaft and a sealing device. One end of the main shaft is connected to the magnetic bearing in a transmission manner, and the other end of the main shaft is connected to the impeller and can drive the impeller to rotate; the sealing device includes a main body and a plurality of sealing teeth, the main shaft is rotatably arranged in the main body, the main body and the impeller are arranged opposite to each other along a first direction, a plurality of sealing teeth are arranged on the end face of the main body facing the impeller, and the outer surface of at least one of the sealing teeth is provided with a wearable layer, and the wearable layer is constructed to be worn when colliding with the impeller, wherein the first direction is consistent with the axial direction of the main shaft.

[0007] According to the compressor of the utility model, by providing an abradable layer on at least one sealing tooth to reduce the probability of instability of the impeller after contacting the abradable layer, the gap between the sealing device and the impeller can be reduced to reduce the leakage between the impeller and the sealing device, thereby improving the energy efficiency of the compressor of the utility model. Moreover, by providing the abradable layer, the impeller can continue to rotate after colliding with the abradable layer, so that the compressor of the utility model has higher reliability.

[0008] In addition, the compressor according to the utility model may also have the following additional technical features:

[0009] In some embodiments of the present invention, the outer surface of each of the sealing teeth is provided with the wearable layer; and / or the wearable layer is provided on at least a portion of the end surface of the main body facing the impeller.

[0010] In some embodiments of the present invention, the area of ​​the wearable layer is less than or equal to the area of ​​the outer surface of the sealing tooth.

[0011] In some embodiments of the present invention, the thermal conductivity of the wearable layer is 0.03 W / mk to 0.5 W / mk.

[0012] In some embodiments of the utility model, the sealing teeth are annular structures, and there are at least three sealing teeth. The plurality of sealing teeth are mutually nested and spaced along a second direction, and the second direction is perpendicular to the first direction, wherein the distance between at least one group of adjacent sealing teeth is equal to the distance between any other group of sealing teeth, or the distance between at least one group of adjacent sealing teeth is greater than or less than the distance between at least another group of adjacent sealing teeth.

[0013] In some embodiments of the present invention, the wearable layer is crimped to the sealing tooth; or, the wearable layer is bonded to the sealing tooth; or, the wearable layer is sprayed or coated on the sealing tooth.

[0014] In some embodiments of the present invention, the abradable layer is a polytetrafluoroethylene layer.

[0015] In some embodiments of the present invention, the thickness of the wearable layer is in the range of 0.1 mm to 0.5 mm.

[0016] In some embodiments of the present invention, the sealing tooth has a first end and a second end that are oppositely arranged in the first direction, the second end is connected to the main body, and the gap between the wearable layer of the first end and the impeller is in the range of 0.05mm-0.4mm.

[0017] The second aspect of the utility model provides a HVAC device, comprising the compressor as described in the first aspect above.

[0018] According to the HVAC equipment of the embodiment of the utility model, including the compressor of the above embodiment, by providing an abradable layer on at least one sealing tooth to reduce the probability of instability of the impeller after contacting the abradable layer, the gap between the sealing device and the impeller can be reduced to reduce the amount of leakage at the shaft end of the main shaft, so that the energy efficiency of the compressor of the utility model is higher, and then the HVAC equipment of the utility model is high in energy efficiency. Moreover, by providing the abradable layer, the impeller can continue to rotate after colliding with the abradable layer, so that the compressor of the embodiment of the utility model has higher reliability, and then the HVAC equipment of the utility model has higher energy efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] By reading the detailed description of the preferred embodiment below, various other advantages and benefits will become clear to those of ordinary skill in the art. The accompanying drawings are only used for the purpose of illustrating the preferred embodiment and are not to be considered as limiting the present invention. Moreover, the same reference numerals are used throughout the accompanying drawings to represent the same components. Among them:

[0020] Figure 1 This is a schematic structural diagram of a compressor according to one embodiment of the utility model;

[0021] Figure 2 for Figure 1 The enlarged view of point A in the middle;

[0022] Figure 3 for Figure 1 The enlarged view of point B in the middle shows that the impeller and the abradable layer are in a state of abrasion;

[0023] Figure 4 for Figure 1 A partial enlarged view of the seal structure at B in the middle, where the abradable layer is in a worn state;

[0024] Figure 5 for Figure 1 Schematic diagram of some structures in ;

[0025] Figure 6 for Figure 5 Enlarged view of point C in the middle;

[0026] Figure 7 A schematic diagram of a sealing device according to an embodiment of the present utility model;

[0027] Figure 8 A schematic diagram of a sealing device according to another embodiment of the present invention;

[0028] Fig. 9 for Figure 7 The enlarged view of point D in the middle;

[0029] Fig.10 for Figure 8Enlarged view of point E in the middle;

[0030] Fig.11 for Figure 5 Schematic diagram of another perspective of the sealing device.

[0031] The reference numerals in the accompanying drawings represent the following:

[0032] 100. Compressor;

[0033] 1. Sealing device; 11. Main body; 112. End surface of the main body facing the impeller; 12. Sealing teeth; 121. First end; 122. Second end; 13. Abradable layer;

[0034] 2. Impeller;

[0035] 3. Spindle;

[0036] a represents the first direction; b represents the second direction. DETAILED DESCRIPTION

[0037] The exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0038] It should be understood that the terms used herein are only for the purpose of describing specific example embodiments and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an" and "said" as used herein may also be meant to include plural forms. The terms "include", "comprise", "contain", and "have" are inclusive, and therefore specify the existence of stated features, steps, operations, elements and / or parts, but do not exclude the existence or addition of one or more other features, steps, operations, elements, parts, and / or combinations thereof. The method steps, processes, and operations described herein are not interpreted as necessarily requiring them to be performed in the specific order described or illustrated, unless the execution order is clearly indicated. It should also be understood that additional or alternative steps may be used.

[0039] Although the terms first, second, third, etc. can be used in the text to describe multiple elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can only be used to distinguish an element, component, region, layer or section from another region, layer or section. Unless the context clearly indicates, terms such as "first", "second" and other numerical terms do not imply order or sequence when used in the text. Therefore, the first element, component, region, layer or section discussed below can be referred to as the second element, component, region, layer or section without departing from the teaching of the example embodiments.

[0040] For ease of description, spatial relative terms may be used herein to describe the relationship of one element or feature relative to another element or feature as shown in the figure, such as "inside", "outside", "inner side", "outer side", "below", "below", "above", "above", etc. Such spatial relative terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the figure. For example, if the device in the figure is rotated, then the elements described as "below other elements or features" or "below other elements or features" will subsequently be oriented as "above other elements or features" or "above other elements or features". Therefore, the example term "below..." can include both above and below orientations.

[0041] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0042] In the description of the present invention, "plurality" means at least two, such as two, three, four, etc., unless otherwise clearly and specifically defined.

[0043] In the compressor of the prior art, since the main shaft is connected to the magnetic bearing by transmission, the main shaft is in a suspended state when the compressor is working. When the impeller deflects during rotation, the impeller collides with the sealing structure. When the sealing structure contacts the impeller, the impeller is hindered from rotating, causing the impeller and the main shaft to become unstable. In order to reduce the probability of collision between the impeller and the sealing structure, the prior art usually increases the gap between the sealing structure and the impeller to reduce the probability of collision between the sealing structure and the impeller. However, the increase in the gap between the sealing structure and the impeller will lead to an increase in the leakage between the sealing structure and the impeller, thereby resulting in poor energy efficiency of the compressor.

[0044] In order to solve the problem in the prior art that the gap between the sealing structure and the impeller is large, resulting in large leakage and poor compressor energy efficiency, the embodiment of the utility model proposes a compressor 100, which can reduce the probability of instability after the impeller 2 collides with the sealing device 1, thereby reducing the gap between the sealing device 1 and the impeller 2, and further reducing the leakage between the sealing device 1 and the impeller 2, and can improve the energy efficiency of the compressor.

[0045] The embodiment of the present utility model further proposes a compressor 100 including the above embodiment, which can reduce the shaft end leakage of the main shaft 3 and has higher energy efficiency.

[0046] Combine the following Figures 1 to 11 The compressor 100 and the compressor according to the embodiment of the present invention are described.

[0047] Combination Figures 1 to 11 As shown, the compressor 100 of the embodiment of the utility model comprises: an impeller 2, a magnetic bearing (not shown in the figure), a main shaft 3 and a sealing device 1. One end of the main shaft 3 is connected to the magnetic bearing in a transmission manner, and the other end of the main shaft 3 is connected to the impeller 2 and can drive the impeller 2 to rotate; the sealing device 1 comprises a main body 11 and a plurality of sealing teeth 12, the main shaft 3 is rotatably arranged in the main body 11, the main body 11 and the impeller 2 are arranged opposite to each other in a first direction, and a plurality of sealing teeth 12 are arranged on the end face 112 of the main body facing the impeller, and the outer surface of at least one sealing tooth 12 is provided with a wearable layer 13, and the wearable layer 13 is constructed to be worn when colliding with the impeller 2. Among them, the first direction is consistent with the axial direction of the main shaft 3.

[0048] The first direction is Figure 1 , Figure 2 , Figure 5 and Figure 6 As shown by the arrow at a, as some examples, the first direction is the axial direction of the main axis 3.

[0049] The main body 11 and the impeller 2 are arranged opposite to each other in the first direction, and each sealing tooth 12 is located between the main body 11 and the impeller 2 in the first direction. A cut-off gap and an expansion cavity are formed between adjacent sealing teeth 12 to produce a throttling effect when the impeller 2 rotates, thereby reducing the leakage between the impeller 2 and the main body 11.

[0050] When the compressor 100 is working, the main shaft 3 is in a suspended state under the action of the magnetic suspension bearing, and the main shaft 3 is in a suspended state under the action of the magnetic suspension bearing, and the main shaft 3 drives the impeller 2 to rotate to compress the air or refrigerant. The wearable layer 13 is arranged on the sealing tooth 12 that has a risk of collision with the impeller 2, so that the impeller 2 can contact the wearable layer 13 when it is deflected. The sealing tooth 12 with the wearable layer 13 can be one or more, and the wearable layer 13 can be arranged on a part of the sealing teeth 12 among the multiple sealing teeth 12, or each sealing tooth 12 can be arranged on the wearable layer 13. For those skilled in the art, the number of sealing teeth 12 with the wearable layer 13 can be determined according to the actual situation, and whether the sealing tooth 12 has a risk of collision with the impeller 2 can also be determined according to the actual situation.

[0051] Combination Figure 3 and Figure 4 As shown, when the impeller 2 deflects during rotation, the impeller 2 collides and contacts with the wearable layer 13 of the sealing tooth 12, and the portion of the wearable layer 13 in contact with the impeller 2 wears and separates from the wearable layer 13 under the rubbing action of the impeller 2, so as to avoid hindering the rotation of the impeller 2, thereby preventing the impeller 2 from being subjected to excessive resistance, thereby reducing the probability of instability of the impeller 2 and the main shaft 3, and, further, since the portion of the wearable layer 13 in contact with the impeller 2 wears and separates from the wearable layer 13 under the rubbing action of the impeller 2, the impeller 2 can continue to rotate after colliding and contacting with the wearable layer 13, thereby improving the reliability of the compressor 100 of the embodiment of the utility model.

[0052] As some examples, the wear portion of the wearable layer 13 produced by the impact and abrasion of the impeller 2 is as follows: Figure 4 As shown at point c in the middle, point c is in a smooth state after being worn.

[0053] Since the probability of instability of the impeller 2 and the main shaft 3 can be reduced after the impeller 2 collides with the wearable layer 13, the present embodiment can reduce the gap between the impeller 2 and the sealing device 1, thereby reducing the leakage between the impeller 2 and the sealing device 1, thereby improving the energy efficiency of the compressor having the embodiment of the utility model.

[0054] The compressor 100 of the embodiment of the utility model is provided with an abradable layer 13 on at least one sealing tooth 12 to reduce the probability of instability of the impeller 2 after contacting the abradable layer 13, thereby reducing the gap between the sealing device 1 and the impeller 2, and reducing the leakage between the impeller 2 and the sealing device 1, so as to improve the energy efficiency of the compressor having the embodiment of the utility model. Moreover, by providing the abradable layer 13, the impeller 2 can continue to rotate after colliding with the abradable layer 13, so that the compressor 100 of the embodiment of the utility model has higher reliability.

[0055] During the assembly of the compressor 100 of this embodiment, the wearable layer 13 can be used as a positioning mark. Since the distance between the wearable layer 13 on the end of the sealing tooth 12 close to the impeller 2 and the impeller 2 is small, the difficulty of positioning the impeller 2 can be reduced.

[0056] Specifically, the main body 11 of the sealing device 1 is arranged on the end cover of the magnetic bearing, a part of the main shaft 3 is located inside the magnetic bearing and is transmission-connected to the magnetic bearing, and another part of the main shaft 3 is located outside the magnetic bearing and passes through the end cover and the main body 11 of the magnetic bearing.

[0057] The main body 11 is disposed on the end cover of the magnetic bearing to install and fix the main body 11, so that the compressor 100 of this embodiment has a reasonable structure.

[0058] Combination Figure 7 , Figure 8 , Fig. 9 and Fig.10 As shown, in some embodiments of the present invention, an outer surface of each sealing tooth 12 is provided with a wearable layer 13 .

[0059] An abradable layer 13 is provided on the outer surface of each sealing tooth 12, which can further enable the impeller 2 to contact the abradable layer 13 when deflected, thereby further reducing the probability of instability of the impeller 2 after contacting the abradable layer 13, and further improving the reliability of the compressor 100 of the embodiment of the utility model.

[0060] Combination Figure 7 and Fig. 9 As shown, in some embodiments of the present invention, at least a portion of the end surface 112 of the main body facing the impeller is provided with a wearable layer 13.

[0061] The at least part of the outer surface may be a part of the outer surface or the entire outer surface.

[0062] By providing at least a portion of the end surface 112 of the main body facing the impeller with the wearable layer 13, the impeller 2 can further contact the wearable layer 13 when deflected, thereby further reducing the probability of the impeller 2 becoming unstable after contacting the wearable layer 13, and further improving the reliability of the compressor 100 of the embodiment of the utility model.

[0063] In addition, during the production process, the end surface 112 of the main body facing the impeller and the sealing teeth 12 are sprayed as a whole, which can reduce the process difficulty and improve the production efficiency.

[0064] In some embodiments of the present invention, the area of ​​the wearable layer 13 is less than or equal to the area of ​​the outer surface of the sealing tooth 12. That is, the wearable layer 13 is provided on the entire outer surface of each sealing tooth 12, or the wearable layer 13 is provided on a portion of the outer surface of at least a portion of the sealing teeth 12.

[0065] By making the area of ​​the wearable layer 13 smaller than or equal to the area of ​​the outer surface of the sealing tooth 12 , the sealing device 1 of this embodiment can adapt to various usage requirements and production requirements.

[0066] In some embodiments of the present invention, the wearable layer 13 is a soft material that is resistant to high temperatures.

[0067] A large amount of heat is generated at the contact portion between the wearable layer 13 and the impeller 2 due to the rubbing action of the impeller 2, so that the wearable layer 13 has a higher melting point to prevent the wearable layer 13 from melting at a high temperature.

[0068] Providing the wearable layer 13 with a lower hardness can make the portion of the wearable layer 13 that contacts the impeller 2 more easily detach from the wearable layer 13 under the impact of the impeller 2, thereby reducing the impact of the wearable layer 13 on the movement of the impeller 2 when it wears, and further increasing the reliability of the compressor 100 of the embodiment of the utility model.

[0069] In the prior art, the gap between the impeller and the sealing structure increases as the temperature of the coil of the magnetic bearing increases.

[0070] Therefore, in some embodiments of the present invention, the thermal conductivity of the wearable layer 13 is 0.03W / mk to 0.5W / mk. In other words, the wearable layer 13 has good thermal insulation performance, so that the wearable layer 13 can play a role in heat insulation, thereby preventing the coil of the magnetic bearing connected to the main shaft 3 from rising too much, thereby preventing the coil of the magnetic bearing from rising too much and causing a gap between the impeller 2 and the sealing device 1.

[0071] In some embodiments of the present invention, the abradable layer 13 is a polytetrafluoroethylene layer.

[0072] The melting point of polytetrafluoroethylene is relatively high, which can prevent the heat generated when the impeller 2 rubs against the polytetrafluoroethylene layer from melting the polytetrafluoroethylene layer.

[0073] The hardness of polytetrafluoroethylene is relatively low, so that the portion of the polytetrafluoroethylene layer in contact with the impeller 2 can be more easily separated from the polytetrafluoroethylene layer under the impact and abrasion of the impeller 2 .

[0074] Polytetrafluoroethylene has a low thermal conductivity and can play a role in heat insulation, thereby preventing the coil of the magnetic bearing connected to the main shaft 3 from rising too much in temperature.

[0075] Combination Figure 1 , Figure 2 , Figure 5 and Figure 6 As shown, in some embodiments of the present invention, the sealing teeth 12 are annular structures, the plurality of sealing teeth 12 are at least three, the plurality of sealing teeth 12 are mutually nested and spaced along the second direction, the second direction is perpendicular to the first direction, and the distance between at least one group of adjacent sealing teeth 12 is equal to the distance between any other group of sealing teeth 12. Alternatively, the distance between at least one group of adjacent sealing teeth 12 is greater than or less than the distance between at least another group of adjacent sealing teeth 12.

[0076] It should be noted that one group of adjacent sealing teeth 12 and another group of adjacent sealing teeth 12 may include the same sealing teeth 12. For example, the sealing teeth 12a, the sealing teeth 12b and the sealing teeth 12c are arranged in sequence in the second direction, the sealing teeth 12b is located between the sealing teeth 12a and the sealing teeth 12c, one group of sealing teeth 12 may be the sealing teeth 12a and the sealing teeth 12b, and the other group of sealing teeth 12 may be the sealing teeth 12b and the sealing teeth 12c.

[0077] The second direction is Figure 1 , Figure 2 , Figure 5 and Figure 6 As shown by the arrow at b, as some examples, the second direction is the radial direction of the main axis 3.

[0078] By setting the distance between the sealing teeth 12 , the sealing device 1 can adapt to various sealing situations.

[0079] In some embodiments of the present invention, the wearable layer 13 is crimped to the sealing teeth 12, so that the wearable layer 13 can be more firmly arranged on the sealing teeth 12. The wearable layer 13 and the sealing teeth 12 are connected by crimping, so that the sealing device 1 of this embodiment has a fast production speed, a simple production method, and high production efficiency.

[0080] In some embodiments of the present invention, the wearable layer 13 is bonded to the sealing teeth 12, so that the wearable layer 13 can be more firmly arranged on the sealing teeth 12. The wearable layer 13 and the sealing teeth 12 are connected by bonding, so that the sealing device 1 of this embodiment has a fast production speed, a simple process, and a low cost.

[0081] In some embodiments of the present invention, the wearable layer 13 is disposed on the sealing teeth 12 by spraying or coating, so that the wearable layer 13 can be more firmly disposed on the sealing teeth 12. The wearable layer 13 is connected to the sealing teeth 12 by spraying or coating, so that the wearable layer 13 has good adhesion and the production process difficulty of the sealing device 1 of the embodiment of the present invention is low.

[0082] In some embodiments of the present invention, the thickness of the wearable layer 13 is in the range of 0.1 mm-0.5 mm, for example: 0.1 mm, 0.2 mm, 0.3 mm, 0.4 mm, 0.5 mm.

[0083] When the thickness of the wearable layer 13 is less than 0.1 mm, the wearable layer 13 is too thin, and there is a risk that the impeller 2 wears through the wearable layer 13 and directly contacts the sealing teeth 12 .

[0084] When the thickness of the wearable layer 13 is greater than 0.5 mm, the wearable layer 13 is too thick, resulting in material waste.

[0085] When the thickness of the wearable layer 13 is 0.1 mm-0.5 mm, the thickness of the wearable layer 13 is in a reasonable state, which can prevent the impeller 2 from wearing through the wearable layer 13 and directly contacting the sealing teeth 12, and can avoid material waste.

[0086] Combination Figure 2 and Figure 6 As shown, in some embodiments of the utility model, the sealing tooth 12 has a first end 121 and a second end 122 arranged opposite to each other in the first direction, the second end 122 is connected to the main body 11, and the gap between the wearable layer 13 of the first end 121 and the impeller 2 is in the range of 0.05mm-0.4mm, for example: 0.05mm, 0.1mm, 0.2mm, 0.3mm, 0.4mm.

[0087] As some examples, the gap between the wearable layer 13 of the first end portion 121 and the impeller 2 is as follows: Figure 2 As shown in d in the middle.

[0088] When the gap between the wearable layer 13 at the first end portion 121 and the impeller 2 is less than 0.05 mm, the friction frequency between the impeller 2 and the wearable layer 13 is relatively high.

[0089] When the gap between the wearable layer 13 of the first end portion 121 and the impeller 2 is greater than 0.4 mm, the leakage between the impeller 2 and the sealing device 1 is relatively large.

[0090] When the gap between the wearable layer 13 of the first end portion 121 and the impeller 2 is 0.05 mm-0.4 mm, the friction frequency between the impeller 2 and the wearable layer 13 can be reduced, and the leakage amount can be kept in a reasonable state.

[0091] The HVAC equipment of the utility model comprises a magnetic suspension bearing and a compressor 100 as described above, and the main shaft 3 is transmission-connected with the magnetic suspension bearing.

[0092] The HVAC equipment of the embodiment of the utility model includes the compressor 100 of the above embodiment, and the wearable layer 13 is provided on at least one sealing tooth 12 to reduce the probability of instability of the impeller 2 after contacting the wearable layer 13, so that the gap between the sealing device 1 and the impeller 2 can be reduced to reduce the axial end leakage of the main shaft 3, so that the energy efficiency of the compressor 100 of the embodiment of the utility model is higher, and the HVAC equipment of the embodiment of the utility model is high in energy efficiency. Moreover, by providing the wearable layer 13, the impeller 2 can continue to rotate after colliding with the wearable layer 13, so that the compressor of the embodiment of the utility model has higher reliability, and the HVAC equipment of the embodiment of the utility model has higher energy efficiency.

[0093] The above is only a preferred specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A compressor, characterized in that: include: impeller; Magnetic bearings; A main shaft, one end of which is drivingly connected to a magnetic bearing, and the other end of which is connected to the impeller and can drive the impeller to rotate; A sealing device, the sealing device comprising a main body and a plurality of sealing teeth, the main shaft is rotatably inserted into the main body, the main body and the impeller are arranged opposite to each other along a first direction, a plurality of the sealing teeth are arranged on the end surface of the main body facing the impeller, an outer surface of at least one of the sealing teeth is provided with a wearable layer, and the wearable layer is constructed to be worn when colliding with the impeller, wherein the first direction is consistent with the axial direction of the main shaft.

2. The compressor according to claim 1, characterized in that The outer surface of each sealing tooth is provided with the wearable layer; and / or, The wearable layer is provided on at least a portion of the end surface of the main body facing the impeller.

3. The compressor according to claim 1, characterized in that The area of ​​the wearable layer is smaller than or equal to the area of ​​the outer surface of the sealing tooth.

4. The compressor according to claim 1, characterized in that The thermal conductivity of the abradable layer is 0.03 W / mk to 0.5 W / mk.

5. The compressor according to claim 1, characterized in that The sealing teeth are annular structures, the number of the plurality of sealing teeth is at least three, the plurality of sealing teeth are mutually sleeved and spaced apart along a second direction, and the second direction is perpendicular to the first direction. The distance between at least one group of adjacent sealing teeth is equal to the distance between any other group of sealing teeth, or the distance between at least one group of adjacent sealing teeth is greater than or less than the distance between at least another group of adjacent sealing teeth.

6. The compressor according to claim 1, characterized in that The wearable layer is pressed against the sealing tooth; or, The wearable layer is bonded to the sealing tooth; or, The abradable layer is sprayed or coated on the sealing teeth.

7. The compressor according to claim 1, characterized in that The abradable layer is a polytetrafluoroethylene layer.

8. The compressor according to any one of claims 1 to 7, characterized in that: The thickness of the wearable layer is in the range of 0.1 mm to 0.5 mm.

9. The compressor according to any one of claims 1 to 7, characterized in that: The sealing tooth has a first end and a second end that are oppositely arranged in the first direction, the second end is connected to the main body, and a gap between the wearable layer of the first end and the impeller is in the range of 0.05 mm-0.4 mm.

10. A HVAC equipment, characterized in that: include: A compressor as claimed in any one of claims 1 to 9.

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