Sealing components, sealing devices, compressors and HVAC equipment

Abstract

This invention discloses a sealing assembly, a sealing device, a compressor, and a heating, ventilation, and air conditioning (HVAC) system. The sealing assembly includes a bushing and a seal. The bushing has a receiving groove on its circumferential surface. The seal is at least partially embedded in the receiving groove and is movable along the depth direction of the receiving groove, and is adapted to protrude from the circumferential surface of the bushing. According to the sealing assembly of this invention, the seal is movable along the depth direction of the sealing groove. When the seal is embedded in the receiving groove, it facilitates the installation of the sealing assembly onto a component. When the seal protrudes from the circumferential surface of the bushing, it improves the sealing effect between the component and the bushing.

Description

Technical Field

[0001] This invention relates to the field of mechanical structure sealing technology, and particularly to a sealing component, sealing device, compressor, and heating and ventilation equipment. Background Technology

[0002] A compressor is a device that compresses low-pressure gas into high-pressure gas. The sealing of its internal structure affects the performance and efficiency of the entire compressor. Poor sealing can easily lead to gas leakage and energy loss. Therefore, a good sealing device needs to be installed inside the compressor. Summary of the Invention

[0003] This invention aims to at least partially solve one of the technical problems in the related art. Therefore, one object of this invention is to provide a sealing assembly that is easy to install and provides a good sealing effect.

[0004] Another object of the present invention is to provide a sealing device comprising the aforementioned sealing components.

[0005] Another object of the present invention is to provide a compressor comprising the aforementioned sealing assembly or sealing device.

[0006] Another object of the present invention is to provide a heating, ventilation and air conditioning (HVAC) device including the aforementioned sealing assembly; or the aforementioned sealing device; or the aforementioned compressor.

[0007] According to an embodiment of the present invention, a sealing assembly includes a bushing and a seal. The bushing has a receiving groove on its circumferential surface. The seal is at least partially embedded in the receiving groove and is movable along the depth direction of the receiving groove, and is adapted to protrude from the circumferential surface of the bushing.

[0008] According to the sealing assembly of the present invention, the seal can move along the depth direction of the sealing groove. When the seal is embedded in the receiving groove, it is convenient to install the sealing assembly onto the component. After being installed onto the component, the movable seal protrudes from the circumferential surface of the bushing. At this time, the seal can improve the sealing effect between the component and the bushing.

[0009] In addition, the sealing assembly according to the above embodiments of the present invention may also have the following additional technical features:

[0010] Optionally, the seal includes a plurality of sealing discs distributed circumferentially along the bushing, each of the sealing discs being at least partially embedded in the receiving groove and movable along the depth direction of the receiving groove.

[0011] Optionally, the seal is adapted to be housed in the receiving groove, and a plurality of the sealing pieces cooperate in the receiving groove to form an annulus that is circumferentially connected along the bushing.

[0012] Optionally, the bushing is provided with a plurality of slots, the slots extending along the axial direction of the bushing; the sealing plate is provided with mating grooves, the plurality of mating grooves corresponding to the plurality of slots respectively, and opposite to each other along the axial direction.

[0013] Optionally, the sealing assembly includes a plurality of the sealing elements, which are arranged axially along the bushing, and adjacent sealing elements are respectively configured as a first partition and a second partition.

[0014] Optionally, the joint of adjacent sealing sheets in the first partition is opposite to the sealing sheet in the second partition; the joint of adjacent sealing sheets in the second partition is opposite to the sealing sheet in the first partition.

[0015] Optionally, the bushing is provided with a plurality of slots, the slots extending along the axial direction of the bushing; the sealing plates of the first partition and the second partition are each provided with mating grooves, the plurality of slots corresponding to the plurality of mating grooves respectively, and opposite to each other along the axial direction of the bushing.

[0016] Optionally, at the junction of adjacent sealing sheets in the second partition, a second clearance groove corresponding to the mating groove on the sealing sheet of the first partition is provided; at the junction of adjacent sealing sheets in the first partition, a first clearance groove corresponding to the mating groove on the sealing sheet of the second partition is provided.

[0017] Optionally, the sealing assembly further includes a first pin, which is removably inserted into the corresponding slot and the mating groove, and can position the seal within the receiving groove.

[0018] Optionally, the first pin includes: a first limiting portion, which is removably embedded in the slot; and a first positioning portion, which is connected to the first limiting portion and located on the side of the slot away from the peripheral surface; the first positioning portion is inserted into the mating groove to limit the seal within the receiving groove.

[0019] Optionally, in orthographic projection along the axial direction, the first positioning portion is located at the end of the first limiting portion away from the circumferential surface.

[0020] Optionally, the sealing assembly further includes a second pin, which is removably inserted into the corresponding slot and the mating groove, and can drive the seal to protrude from the circumferential surface of the bushing.

[0021] Optionally, the second pin includes: a second limiting portion, which is removably embedded in the slot; a second positioning portion, one end of which is connected to the second limiting portion and located in the slot near the circumferential surface; the second positioning portion is inserted into the mating groove and limits the seal; and a driving portion, which is connected to the other end of the second positioning portion and extends obliquely to guide the seal to move along the depth direction.

[0022] Optionally, in the orthographic projection along the axial direction, the second positioning portion is located at the end of the second limiting portion near the circumferential surface.

[0023] According to an embodiment of the present invention, a sealing device includes: a sealing cover and the aforementioned sealing assembly, wherein the sealing cover is provided with a mounting hole; and the bushing is fitted into the mounting hole.

[0024] Optionally, a sealing groove is provided on the inner circumferential surface of the mounting hole, and the sealing element can be embedded in the sealing groove.

[0025] The compressor according to an embodiment of the present invention includes the aforementioned sealing assembly; or the aforementioned sealing device.

[0026] The HVAC equipment according to embodiments of the present invention includes the aforementioned sealing assembly; or the aforementioned sealing device; or the aforementioned compressor.

[0027] This invention provides a sealing assembly, a sealing device, a compressor, and HVAC equipment. By making the seal movable, the installation of the sealing assembly and components is facilitated. When the seal protrudes from the circumferential surface of the bushing, the sealing effect can be improved. The good sealing effect of the sealing assembly can improve the working stability and efficiency of the compressor, thereby improving the operational stability of the HVAC equipment. Attached Figure Description

[0028] Figure 1 This is a cross-sectional schematic diagram of a sealing device according to an embodiment of the present invention, wherein the sealing element is embedded in the receiving groove.

[0029] Figure 2 This is a schematic diagram of the first partition of the sealing assembly in the receiving groove according to an embodiment of the present invention.

[0030] Figure 3 This is a schematic diagram of the second partition of the sealing assembly in the receiving groove according to an embodiment of the present invention.

[0031] Figure 4 This is a cross-sectional schematic diagram of the bushing of the sealing assembly according to an embodiment of the present invention.

[0032] Figure 5 This is a cross-sectional schematic diagram of a sealing device according to an embodiment of the present invention, wherein the sealing element protrudes from the circumferential surface of the bushing.

[0033] Figure 6 This is a schematic diagram of a sealing assembly according to an embodiment of the present invention, wherein a first partition protrudes from the circumferential surface of the bushing.

[0034] Figure 7 This is a schematic diagram of a sealing assembly according to an embodiment of the present invention, wherein the second partition protrudes from the circumferential surface of the bushing.

[0035] Figure 8 This is a schematic diagram of the first pin of the sealing assembly according to an embodiment of the present invention.

[0036] Figure 9 This is a schematic diagram of the second pin of the sealing assembly according to an embodiment of the present invention.

[0037] Figure 10 This is a cross-sectional schematic diagram of the compressor according to an embodiment of the present invention.

[0038] Figure label:

[0039] Compressor 1000, sealing device 100, sealing assembly 10, bushing 11, receiving groove 111, slot 112, seal 12, first partition 12a, second partition 12b, sealing sheet 121, mating groove 1211, first clearance groove 1212, second clearance groove 1213, first pin 13, first limiting part 131, first positioning part 132, second pin 14, second limiting part 141, second positioning part 142, drive part 143, sealing cover 20, sealing groove 21, housing 200, first stage impeller 300, second stage impeller 400, magnetic bearing 500, stator 600, rotor 700. Detailed Implementation

[0040] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0041] A compressor is a device that compresses low-pressure gas into high-pressure gas. To prevent gas leakage and impurities from entering, and to ensure the normal operation of the compressor, good sealing measures are required between the various components of the compressor. In addition, in multi-stage compressors, the gas is compressed step by step, and the outlet gas pressure and temperature of the later stage are higher than those of the previous stage. Without a good sealing structure, the gas can easily flow from the high-pressure area to the low-pressure area, and will take away a large amount of energy. Therefore, a sealing structure is required between the compressor stages to prevent gas leakage and energy loss, thereby ensuring the working efficiency and reliability of the compressor.

[0042] Combination Figure 1 and Figure 5According to an embodiment of the present invention, the sealing assembly 10 includes a bushing 11 and a seal 12. The bushing 11 may be provided with a receiving groove 111 on its circumferential surface. At least a portion of the seal 12 is embedded in the receiving groove 111. This can be a part of the seal 12 being embedded in the receiving groove 111, or the seal 12 being entirely embedded in the receiving groove 111. The receiving groove 111 can position and fix the seal 12. The seal 12 can also move along the depth direction of the receiving groove 111. The seal 12 is adapted to protrude from the circumferential surface of the bushing 11 in order to seal the gap between the component and the outer circumferential surface of the bushing 11, thereby improving the sealing effect of the sealing assembly 10. Specifically, the seal 12 can move along the depth direction of the receiving groove. When the seal 12 is at least partially embedded in the receiving groove 111, it can be the initial installation position of the seal 12. That is, when assembling the sealing assembly 10, the seal 12 can be embedded into the receiving groove 111 first, and the receiving groove 111 can be used to position and fix the seal 12. After the sealing assembly 10 is engaged with the component, the seal 12 is moved along the depth direction of the receiving groove. The seal 12 extends out of the receiving groove 111 and protrudes from the circumferential surface of the bushing 11. At this time, the seal 12 can achieve sealing of the component. The seal 12 is movable. When the seal 12 is embedded in the receiving groove, it is convenient to install the sealing assembly 10 onto the component. After it is installed onto the component, the seal 12 can be moved to protrude from the circumferential surface of the bushing 11. At this time, the seal 12 can improve the sealing effect between the component and the bushing 11 without increasing the radial dimension of the component. The structure is compact and the sealing effect is good.

[0043] Specifically, the bushing 11 in the sealing assembly 10 can be sleeved on the rotating shaft. The bushing 11 can be installed on the component. The seal 12 can be positioned in the receiving groove 111 of the bushing 11. At this time, the seal 12 is embedded in the receiving groove to facilitate installation on the component. After the sealing assembly 10 is installed on the component, the seal 12 is moved. The seal 12 protrudes from the outer circumferential surface of the bushing 11 to achieve gap sealing between the bushing 11 and the component, thereby improving the sealing effect on the component.

[0044] The sealing component 10 can be applied to any component of the compressor 1000 that requires sealing. It can be a pneumatic seal between any component, such as a seal between the shaft end and the fixed end, or an interstage seal within the compressor 1000. Taking a magnetic levitation compressor 1000 as an example, the compressor mainly consists of a motor, a magnetic bearing 500, an impeller, and a volute. The interstage sealing performance between the magnetic bearing 500 and the impeller directly affects the overall operational stability and reliability of the compressor 1000. The sealing component 10 can be positioned between the magnetic bearing 500 and the impeller. Specifically, the bushing 11 can be fitted onto the rotor 700 shaft, and a sealing cover 20 can be fitted onto the bushing 11. The sealing element 12 can be first positioned and fixed in the receiving groove 111 of the bushing 11, and then the sealing cover 20 can be fitted onto the bushing 11. At this time, because the sealing element 12 is embedded in the receiving groove, the sealing cover 20 can be easily installed onto the bushing. On 11, the installation efficiency of the sealing cover 20 is improved. After the sealing cover 20 is installed on the bushing 11, the sealing member 12 can be moved to protrude from the circumferential surface of the bushing 11. The sealing member 12 can seal the gap between the sealing cover 20 and the bushing 11, so as to avoid the high-pressure airflow during the high-speed rotation of the impeller from affecting the working stability of the magnetic bearing 500, and can reduce gas leakage and energy loss, thereby improving the working efficiency of the compressor 1000. Of course, the sealing component 10 of this application can also be applied to the pneumatic sealing between other components of the compressor 1000. The above description is only some specific embodiments of the present invention and is not a limitation on the scope of protection of the present invention.

[0045] The seal 12 can move along the depth direction of the receiving groove 111. It can be that the seal 12 has a driving member that can drive the seal 12 to move, or a pin can be provided on the sealing assembly 10 to drive the seal 12 to move, thereby realizing the movement of the seal 12 along the depth direction of the receiving groove.

[0046] In addition, when the seal 12 is initially installed, it extends outward toward the receiving groove 111 compared to when sealing the component. The seal 12 can be made of a flexible material that can extend outward toward the sealing groove 21. Alternatively, it can be a seal 12 made of multiple sealing pieces 121 spliced ​​together. When the seal 12 extends outward toward the receiving groove 111, the multiple sealing pieces 121 expand around the outer peripheral surface of the bushing 11.

[0047] Combination Figure 1 and Figure 5 The present invention also provides a sealing device 100, which may include a sealing cover 20 and the aforementioned sealing component 10, wherein the sealing cover 20 may be provided with a mounting hole, and the bushing 11 of the sealing component 10 may be fitted into the mounting hole to improve the structural fit stability between the sealing component 10 and the sealing cover 20.

[0048] Furthermore, a sealing groove 21 can be provided on the inner circumferential surface of the mounting hole. When high-pressure gas flows through the sealing device 100, the sealing effect of the sealing device 100 can be improved and gas leakage can be reduced through the throttling effect. The sealing element 12 can be embedded in the sealing groove 21. By providing the sealing element 12 in the sealing groove 21, when the airflow passes through the sealing groove 21, the pressure and velocity of the airflow can be further reduced by the obstruction of the sealing element 12, further improving the sealing effect of the sealing device 100.

[0049] Combination Figure 1 , Figure 2 and Figure 3 In some embodiments of the present invention, the seal 12 may include a plurality of sealing pieces 121 distributed circumferentially along the bushing 11, each sealing piece 121 being at least partially embedded in the receiving groove 111 and movable along the depth direction of the receiving groove 111. By providing a plurality of sealing pieces 121, and the plurality of sealing pieces 121 being independent, after the seal 12 moves and protrudes from the circumferential surface of the bushing 11 along the depth direction of the receiving groove, the plurality of sealing pieces 121 expand around the outer circumferential surface of the bushing 11, which facilitates the movement of the seal 12 and improves the installation efficiency of the sealing assembly 10.

[0050] The seal 12 may include a plurality of sealing pieces 121 distributed circumferentially along the bushing 11. The number of sealing pieces 121 may be any integer, for example, two, three, four, five, six, eight, etc., and may be adjusted according to the size or structure of the compressor 1000 components.

[0051] Combination Figure 6 , Figure 7 and Figure 8 When the seal 12 moves along the depth direction of the receiving groove, multiple sealing pieces 121 protrude from the outer peripheral surface of the bushing 11 and are embedded in the sealing groove 21, so as to block the airflow entering the sealing groove 21 and improve the sealing performance of the sealing device 100.

[0052] In addition, after the bushing 11 is installed in the mounting hole of the sealing cover 20, the seal 12 is movable. When the seal 12 protrudes from the circumferential surface of the bushing 11, it is embedded in the sealing groove 21, effectively blocking the airflow entering the sealing groove 21 without increasing the radial dimension of the sealing device 100, making the structure of the sealing device 100 compact and the sealing effect good.

[0053] Combination Figure 1 and Figure 2When the seal 12 is embedded in the receiving groove, the multiple sealing pieces 121 in the seal 12 cooperate to form an annular ring connected along the circumference of the bushing 11. That is, when the seal 12 is initially installed on the bushing 11, the multiple sealing pieces 121 are connected along the circumference of the bushing 11 so as to arrange more sealing pieces 121 and improve the sealing effect of the sealing device 100.

[0054] Combination Figure 2 , Figure 3 and Figure 4 In some embodiments of the present invention, the bushing 11 may be provided with a plurality of slots 112, the slots 112 may extend along the axial direction of the bushing 11, and the sealing plate 121 may be provided with a mating groove 1211, the plurality of mating grooves 1211 and the plurality of slots 112 respectively correspond to each other and are opposite each other along the axial direction. After the sealing plate 121 is installed on the bushing 11, the sealing plate 121 can be driven to move by a driving device, thereby improving the installation efficiency of the sealing device 100.

[0055] Combination Figure 1 In some embodiments of the present invention, the sealing assembly 10 may include a first pin 13, which can be removably inserted into the corresponding slot 112 and mating groove 1211, and can position the seal 12 in the receiving groove. By setting the first pin 13, the seal 12 is positioned. For example, the seal 12 can be installed into the receiving groove 111 of the bushing 11 first, and the seal 12 can be positioned by the first pin 13. Then, the sealing cover 20 or the housing can be installed onto the bushing 11. This can improve the structural stability of the seal 12 and prevent the seal 12 from shifting during the installation of the sealing cover 20 or the housing, thereby improving the assembly efficiency of the sealing assembly 10.

[0056] Specifically, multiple sealing pieces 121 can be installed in the receiving groove 111 of the bushing 11. At this time, the sealing piece 121 is located in the receiving groove. The first pin 13 is inserted into the bushing 11 from the slot 112 of the bushing 11 and simultaneously passes through the mating groove 1211 of the sealing piece 121 to lock the sealing piece 121. Then, the sealing cover 20 is fitted onto the bushing 11. At this time, the sealing groove 21 of the sealing cover 20 is directly opposite the sealing piece 121. The first pin 13 enables the sealing piece 121 to be stably positioned in the receiving groove. After the sealing cover 20 is fitted onto the bushing 11, the first pin 13 can be removed.

[0057] Combination Figure 5Furthermore, the sealing assembly 10 may also include a second pin 14, which can be removably inserted into the corresponding slot 112 and mating groove 1211, and can drive the seal 12 to protrude from the circumferential surface of the bushing. For example, after the sealing cover 20 is fitted onto the bushing 11, the seal 12 can be moved into the sealing groove 21 by the second pin 14, effectively solving the problem that the sealing sheet 121 cannot be installed in the sealing groove 21, and improving the manufacturing efficiency of the product.

[0058] Specifically, in conjunction with the aforementioned embodiments, after the sealing cap 20 is fitted onto the bushing 11, the first pin 13 is first removed from the bushing 11, and then the second pin 14 is inserted from the slot 112 of the bushing 11 into the bushing 11, passing through the mating groove 1211. When the second pin 14 is inserted into the mating groove 1211 and moves along the axial direction of the bushing 11, the sealing sheet 121 is opened. At this time, the sealing sheet 121 is embedded in the sealing groove 21, and the sealing sheet 121 and the sealing groove 21 form a sealing structure, which has a compact sealing effect.

[0059] In addition, the number of slots 112 can correspond to the number of first pins 13 or second pins 14. That is, there are multiple first pins 13 or second pins 14. Each slot 112 is into which a first pin 13 or a second pin 14 is inserted, so that the first pin 13 can position multiple sealing pieces 121 in the receiving groove. After the sealing cover 20 is installed, the second pin 14 limits the multiple sealing pieces 121.

[0060] Combination Figures 1 to 3 In some embodiments of the present invention, the sealing assembly 10 may include a plurality of seals 12, which may be arranged along the axial direction of the bushing 11, and adjacent seals 12 are respectively configured as a first partition 12a and a second partition 12b. By arranging a plurality of seals 12 along the axial direction of the bushing 11, the airflow can be effectively blocked in the axial direction, thereby further improving the sealing effect of the sealing assembly 10.

[0061] The number of first partitions 12a and second partitions 12b can be one or more. For example, there can be one first partition 12a and one second partition 12b, two first partitions 12a and two second partitions 12b, or three first partitions 12a and three second partitions 12b, etc. The first partitions 12a and second partitions 12b are arranged at intervals in the axial direction of the bushing 11. The first partitions 12a and second partitions 12b can each include multiple sealing pieces 121. The first partitions 12a and second partitions 12b can be set with different shapes or arranged in a staggered manner so that when the seal 12 protrudes from the circumferential surface of the bushing 11, the sealing pieces 121 of the first partition 12a can block the gap between the sealing pieces 121 of the second partition 12b, and the sealing pieces 121 of the second partition 12b can block the gap between the sealing pieces 121 of the first partition 12a, so as to improve the sealing effect of the sealing assembly 10.

[0062] In addition, combined Figure 1 and Figure 5 The bushing 11 is fitted into the mounting hole of the sealing cover 20. Multiple sealing grooves 21 can be arranged on the inner circumferential surface of the mounting hole along the axial direction of the bushing 11. The number of sealing grooves 21 can correspond to the number of sealing elements 12. That is, when the sealing element 12 protrudes from the circumferential surface of the bushing 11, the first partition 12a and the second partition 12b are arranged at intervals in the multiple sealing grooves 21 along the axial direction of the bushing 11. When the airflow enters the sealing groove 21, it can effectively block the airflow through the cooperation of the first partition 12a and the second partition 12b, reduce the leakage of airflow along the axial direction, and improve the sealing performance of the sealing device 100.

[0063] Specifically, multiple sealing grooves 21 on the inner circumferential surface of the mounting hole of the sealing cover 20 form a labyrinth sealing groove. After the sealing element 12 moves from the receiving groove to the circumferential surface protruding from the bushing 11, the sealing piece 121 and the labyrinth sealing groove form a labyrinth sealing structure, making the sealing device 100 compact and having a good sealing effect. In addition, through the cooperation of the first pin 13 and the second pin 14, as well as the design of the bushing 11 and the sealing element 12, the problem of labyrinth seals being unable to be installed is effectively solved through a clever installation method, thereby improving the production efficiency of the product.

[0064] Furthermore, combined Figure 2 and Figure 3 The contact points of adjacent sealing pieces 121 in the first partition 12a are opposite to the sealing pieces 121 in the second partition 12b, and the contact points of adjacent sealing pieces 121 in the second partition 12b are opposite to the sealing pieces 121 in the first partition 12a, thus combining... Figure 6 and Figure 7Understandably, when the seal 12 protrudes from the circumferential surface of the bushing 11, the seal 12 extends out of the receiving groove 111. At this time, multiple sealing pieces 121 will expand outward along the circumferential direction of the bushing 11, and gaps will appear between the joints of the multiple sealing pieces 121. The gaps between the sealing pieces 121 in the first partition 12a are opposite to the sealing pieces 121 in the second partition 12b, and the gaps between the sealing pieces 121 in the second partition 12b are opposite to the sealing pieces 121 in the first partition 12a. When the seal 12 is located protruding from the circumferential surface of the bushing 11, the cooperation of the first partition 12a and the second partition 12b can increase the obstruction to the airflow process, so that the pressure of the airflow continuously decreases during the continuous passage, reducing the leakage of airflow along the axial direction and improving the sealing performance of the sealing assembly 10.

[0065] Combination Figures 2 to 4 The bushing 11 may be provided with multiple slots 112, which extend axially along the bushing 11. Both the sealing plate 121 of the first partition 12a and the sealing plate 121 of the second partition 12b may be provided with mating grooves 1211. The multiple slots 112 correspond to the multiple mating grooves 1211 and are opposite each other axially along the bushing 11. After the sealing plate 121 is installed on the bushing 11, the first pin 13 can be easily inserted into the corresponding slot 112 and can simultaneously pass through the sealing plate 121 in the first partition 12a and the second partition 12b, facilitating the positioning of the sealing plate 121 and improving the structural stability of the sealing assembly 10. Simultaneously, the second pin 14 can easily drive the sealing plate 121 to move to protrude from the circumferential surface of the bushing 11, improving the installation efficiency of the sealing assembly 10.

[0066] Combination Figure 2 and Figure 3 In some embodiments of the present invention, at the junction of adjacent sealing pieces 121 in the second partition 12b, a second clearance groove 1213 corresponding to the mating groove 1211 on the sealing piece 121 of the first partition 12a may be provided, and at the junction of adjacent sealing pieces 121 in the first partition 12a, a first clearance groove 1212 corresponding to the mating groove 1211 on the sealing piece 121 of the second partition 12b may be provided, so that when the first pin 13 or the second pin 14 is inserted into the bushing 11, it can pass through the first partition 12a and the second partition 12b at the same time, thereby improving the installation efficiency of the sealing assembly 10.

[0067] Combination Figure 1 and Figure 8In some embodiments of the present invention, the sealing assembly 10 may include a first pin 13, which positions the seal 12 within the receiving groove. The first pin 13 may include a first limiting portion 131 and a first positioning portion 132. The first limiting portion 131 is removably embedded in the slot 112, limiting the first pin 13 when it is inserted into the bushing 11, thus stably fixing it within the bushing 11. This facilitates effective positioning of the seal 12 by the first pin 13 and allows the first pin 13 to be easily removed from the bushing 11 after the sealing cap 20 is fitted onto it. The first positioning portion 132 is connected to the first limiting portion 131 and is located on the side of the slot 112 away from the circumferential surface. The first positioning portion 132 is inserted into the mating groove 1211 to confine the seal 12 within the receiving groove. In conjunction with the above embodiments, when the sealing sheet 121 is in the receiving groove, the first positioning part 132 is located on the side of the circumferential surface of the slot 112 away from the bushing 11, which facilitates the first pin 13 to position the sealing member 12 in the receiving groove, improves the positioning effect of the sealing member 12, and thus improves the structural stability of the sealing assembly 10.

[0068] Furthermore, in the orthographic projection along the axial direction of the bushing 11, the first positioning part 132 is located at the end of the first limiting part 131 away from the circumferential surface, so that when the seal 12 is in the receiving groove, the first pin 13 can stably fix the seal 12, thereby improving the structural stability of the seal 12.

[0069] Combination Figure 5 and Figure 9In some embodiments of the present invention, the sealing assembly 10 may include a second pin 14, which can drive the seal 12 to protrude from the circumferential surface of the bushing 11. The second pin 14 may include a second limiting portion 141, a second positioning portion 142, and a driving portion 143. The second limiting portion 141 is removably embedded in the slot 112, and when the second pin 14 is inserted into the bushing 11, it can limit the second pin 14, so that the second pin 14 is stably fixed in the bushing 11, thereby facilitating the effective limiting of the seal 12 by the second pin 14. One end of the second positioning part 142 is connected to the second limiting part 141 and is located on the side of the slot 112 near the peripheral surface. The second positioning part 142 is inserted into the mating groove 1211 and limits the sealing member 12. In conjunction with the above embodiment, when the sealing member 12 protrudes from the peripheral surface of the bushing 11, compared to when the sealing member 12 protrudes outward from the receiving groove 111, the second positioning part 142 is located on the side of the slot 112 near the peripheral surface of the bushing 11, which facilitates the second pin 14 in positioning the sealing member 12, improves the positioning effect of the sealing member 12, and thus improves the structural stability of the sealing assembly 10. The second pin 14 may also include a driving part 143, which is connected to the other end of the second positioning part 142 and extends obliquely to guide the sealing member 12 to move along the depth direction. Specifically, when the second pin 14 is inserted into the slot 112, the drive unit 143 first contacts the mating groove 1211 of the seal 12. The drive unit 143 guides the seal 12 to move from the receiving groove 111 to the corresponding sealing groove 21. When the second pin 14 is fully embedded in the bushing 11, it drives multiple seals 12 to protrude from the circumferential surface of the bushing 11, and the second positioning unit 142 limits the multiple seals 12. By setting the second pin 14, the seals 12 are cleverly moved to protrude from the circumferential surface of the bushing 11. After being moved to protrude from the circumferential surface of the bushing 11, the seals 12 can also be positioned, making the structure of the seals 12 stable and improving the sealing effect of the sealing assembly 10.

[0070] Furthermore, in the axial orthogonal projection of the bushing 11, the second positioning part 142 can be located at the end of the second limiting part 141 near the circumferential surface so that when the seal 12 protrudes from the circumferential surface of the bushing 11, the second pin 14 can stably fix the seal 12, thereby improving the structural stability of the seal 12.

[0071] The present invention also provides a compressor 1000, which includes the aforementioned sealing assembly 10.

[0072] The present invention also provides a compressor 1000, which includes the aforementioned sealing device 100.

[0073] The following is combined with Figures 1 to 9In one specific embodiment of the present invention, the compressor 1000 may include a housing 200, a magnetic bearing 500, a motor stator 600, a motor rotor 700, a primary impeller 300, and a secondary impeller 400. The aforementioned sealing device 100 may be provided between the magnetic bearing 500 and the primary impeller 300, and may also be provided between the magnetic bearing 500 and the secondary impeller 400. The sealing device 100 may include a sealing cover 20, a first partition 12a, a second partition 12b, a first pin 13, a second pin 14, and a rotor bushing 11. The sealing cover 20 has a mounting hole, and the inner circumferential surface of the mounting hole has multiple sealing grooves 21, which form a labyrinthine groove. The bushing 11 can be fitted into the mounting hole of the sealing cover 20. The outer circumferential surface of the bushing 11 can have a receiving groove 111. The first partition 12a can be four sealing pieces 121 evenly distributed along the circumference of the bushing 11, and the second partition 12b can be four sealing pieces 121 evenly distributed along the circumference of the bushing 11. The sealing pieces 121 are all embedded in the receiving groove 111, and the joint of adjacent sealing pieces 121 in the first partition 12a is opposite to the sealing pieces 121 in the second partition 12b. The contact point of 121 is opposite to the sealing plate 121 in the first partition 12a. Preferably, the sealing plate 121 of the first partition 12a and the sealing plate 121 of the second partition 12b are staggered by 45°. Four annular receiving grooves 111 can be provided axially on the rotor bushing 11, for placing the first partition 12a, the second partition 12b, and the first partition 12a and the second partition 12b respectively along the axial direction. Multiple slots 112 can be provided along the axial direction of the bushing 11. The sealing plate 121 has a mating groove 1211, and the slots 112 correspond to the mating grooves 1211 and are opposite to each other along the axial direction of the bushing 11, for placing the first pin 13 and the second pin 14. The above description is only some specific embodiments of the present invention and is not intended to limit the scope of protection of the present invention.

[0074] The structure consisting of rotor bushing 11, first partition 12a, second partition 12b, first pin 13, and second pin 14 can be disposed on sealing cover 20, which can be an interstage sealing cover 20. The number of sealing grooves 21 of sealing cover 20 can be any integer, the number of first partitions 12a and second partitions 12b can be any integer, and the number of radial annular grooves of rotor bushing 11 can be any integer. For example, the number of axial slots 112 of rotor bushing 11 can be any integer. The aforementioned arbitrary integers can be two, three, four, five, six, seven, eight, etc., and can be adjusted according to the structure and size of the components. The sealing assembly 10 or sealing device 100 of this embodiment can be applied to pneumatic sealing between any components of compressor 1000.

[0075] The installation method of the sealing device 100 in this embodiment of the invention is as follows: First, the first partition 12a and the second partition 12b are installed in the annular mounting groove 111 of the bushing 11; Second, the first pin 13 is inserted into the bushing 11 from the slot 112 of the bushing 11, and passes through the mating groove 1211 of the first partition 12a and the second partition 12b to lock the seal 12; Third, the sealing cover 20 is fitted into the bushing 11, so that the sealing groove 21 (labyrinth sealing groove) of the sealing cover 20 is aligned with the first partition 12a and the second partition 12b; Fourth, the first pin 13 is removed from the bushing 11; Fifth, the second pin 13 is installed in the bushing 11. Pin 14 is inserted into bushing 11 through slot 112 and passes through first partition 12a and second partition 12b. At this time, the driving part 143 of the second pin 14 drives the first partition 12a and second partition 12b to protrude from the circumferential surface of bushing 11. That is, the first partition 12a and second partition 12b are opened by the driving part 143, and the second pin 14 locks the first partition 12a and second partition 12b in the position protruding from the circumferential surface of bushing 11. The first partition 12a and second partition 12b form a labyrinth sealing structure with the sealing groove 21 (labyrinth sealing groove) in the sealing cover 20 to achieve the purpose of tight sealing.

[0076] In addition, an end cap may be provided on the end face of the bushing 11 to position and lock the second pin 14, so that the second pin 14 can be fixed after the sealing device 100 is assembled, thereby improving the structural stability of the sealing device 100.

[0077] The present invention also provides a heating, ventilation and air conditioning device, which may include the aforementioned sealing assembly 10; or include the aforementioned sealing device 100; or include the aforementioned compressor 1000.

[0078] The sealing assembly 10 according to an embodiment of the present invention has a high-efficiency sealing effect, effectively solving the problem of sealing reliability between compressor classes 1000. Furthermore, the mechanical sealing structure has high reliability and can reduce the failure rate of the sealing assembly 10. The sealing device 100 has a compact labyrinth seal structure design, effectively shortening the axial and radial dimensions of the seal, thereby effectively shortening the axial dimension of the entire machine and helping to reduce the overall cost. In addition, a clever installation method solves the problem of labyrinth seals being unable to be installed, improving product manufacturing efficiency.

[0079] In the description of this invention, it should be understood that the terms "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0080] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0081] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0082] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0083] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0084] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A seal assembly characterized by, include: A bushing, wherein a receiving groove is provided on the circumferential surface of the bushing; A seal, which is at least partially embedded in the receiving groove and movable along the depth direction of the receiving groove, and adapted to protrude from the circumferential surface of the bushing; The seal includes a plurality of sealing discs distributed circumferentially along the bushing, each of the sealing discs being at least partially embedded in the receiving groove and movable along the depth direction of the receiving groove; The bushing is provided with a plurality of slots, which extend along the axial direction of the bushing; the sealing plate is provided with mating grooves, which correspond to the plurality of slots respectively and are opposite to each other along the axial direction. A first pin is removably inserted into the corresponding slot and the mating groove, and can position the seal within the receiving groove.

2. The seal assembly of claim 1, wherein, The seal is adapted to be housed in the receiving groove, and a plurality of the sealing pieces cooperate in the receiving groove to form an annulus that is circumferentially connected along the bushing.

3. The seal assembly of claim 1, wherein, The sealing assembly includes a plurality of the sealing elements, which are arranged axially along the bushing, and adjacent sealing elements are respectively configured as a first partition and a second partition.

4. The sealing assembly according to claim 3, characterized in that, The joint of adjacent sealing sheets in the first partition is opposite to the sealing sheet in the second partition; the joint of adjacent sealing sheets in the second partition is opposite to the sealing sheet in the first partition.

5. The sealing assembly according to claim 4, characterized in that, The bushing is provided with a plurality of slots, which extend along the axial direction of the bushing; the sealing plates of the first partition and the second partition are each provided with mating grooves, and the plurality of slots correspond to the plurality of mating grooves respectively and are opposite to each other along the axial direction of the bushing.

6. The sealing assembly according to claim 5, characterized in that, At the junction of adjacent sealing sheets in the second partition, a second clearance groove is provided, which corresponds to the mating groove on the sealing sheet of the first partition. At the junction of adjacent sealing sheets in the first partition, a first clearance groove is provided, which corresponds to the mating groove on the sealing sheet of the second partition.

7. The sealing assembly according to claim 1, characterized in that, The first pin includes: A first limiting part is removably embedded in the slot; A first positioning part is connected to a first limiting part and is located on the side of the slot away from the peripheral surface; the first positioning part is inserted into the mating groove to limit the seal within the receiving groove.

8. The sealing assembly according to claim 7, characterized in that, In an orthographic projection along the axial direction, the first positioning portion is located at the end of the first limiting portion away from the circumferential surface.

9. The sealing assembly according to claim 1, 5, or 6, characterized in that, Also includes: The second pin is removably inserted into the corresponding slot and the mating groove, and can drive the seal to protrude from the circumferential surface of the bushing.

10. The sealing assembly according to claim 9, characterized in that, The second pin includes: The second limiting part is removably embedded in the slot; The second positioning part has one end connected to the second limiting part and is located inside the slot near the circumferential surface; the second positioning part is inserted into the mating groove and limits the sealing element. A drive unit, which is connected to the other end of the second positioning unit and extends obliquely to guide the seal to move along the depth direction.

11. The sealing assembly according to claim 10, characterized in that, In the orthographic projection along the axial direction, the second positioning portion is located at the end of the second limiting portion near the circumferential surface.

12. A sealing device, characterized in that, include: A sealing cap, wherein the sealing cap is provided with mounting holes; The sealing assembly according to any one of claims 1-11, wherein the bushing is fitted into the mounting hole.

13. The sealing device according to claim 12, characterized in that, A sealing groove is provided on the inner circumferential surface of the mounting hole, and the sealing element can be embedded in the sealing groove.

14. A compressor, characterized in that, It includes the sealing assembly according to any one of claims 1-11; or the sealing device according to claim 12 or 13.

15. A heating, ventilation, and air conditioning (HVAC) device, characterized in that, It includes the sealing assembly according to any one of claims 1-11; or the sealing device according to claim 12 or 13; or the compressor according to claim 14.

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