Sealing device, compressor sealing structure and compressor

Abstract

The utility model provides a sealing device, a compressor sealing structure and a compressor, the sealing device is used for sealing a space between a first component and a second component which can rotate relatively, and the sealing device comprises a framework and an elastic sealing part; the framework and the elastic sealing part are both of an annular structure, the framework is covered with the elastic sealing part, and a sealing lip edge is arranged on the elastic sealing part; when the sealing device is limited to seal the space between the first component and the second component, the sealing lip abuts against the first component or the second component which can rotate. According to the sealing device, the structure of the sealing device is optimized, the sealing device can be directly assembled in the compressor without an additional axial limiting piece, the utilization rate of the space in the compressor can be improved, and the use quality of the compressor can be improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a compressor technical field, especially a sealing device, the utility model discloses further relate to the compressor sealing structure with the sealing device and the compressor with the compressor sealing structure. BACKGROUND

[0002] The sealing device is used to seal the space between the two members that can rotate relatively in the prior art, for example, in the existing scroll compressor technical field, the design of the compression component generally comprises the key components such as the dynamic disc, the static disc, the middle machine body, the suction shell and the rear cover. The dynamic disc and the static disc are connected through the precise relative revolution, and a series of continuously changed suction cavities, intermediate cavities and exhaust cavities are formed, and these symmetrical crescent-shaped closed cavities effectively realize the gradual suction, pressure increase and mass delivery process of low-pressure gas.

[0003] With the flow and compression of the gas in these cavities, the bottom surface of the dynamic disc is inevitably subjected to the axial force from the gas, and the force directly acts on the supporting surface between the dynamic disc and the middle machine body, resulting in the significant friction and wear between the back pressure of the dynamic disc and the supporting surface of the middle machine body. Under long-term operation, the friction and wear not only reduce the operation efficiency of the compressor, but also may cause equipment failure and shorten the service life, which is not conducive to improving the use quality of the compressor. SUMMARY

[0004] Therefore, the utility model aims at providing a sealing device to improve the use quality of the compressor.

[0005] To achieve the above-mentioned purpose, the technical scheme of the utility model is as follows:

[0006] A sealing device is used to seal the space between the first member and the second member that can rotate relatively, and the sealing device comprises a framework and an elastic sealing part.

[0007] The framework and the elastic sealing part are both annular structures, and the elastic sealing part is covered on the framework, and a sealing lip is arranged on the elastic sealing part.

[0008] When the sealing device is limited to seal the space between the first member and the second member, the sealing lip is pressed on the first member or the second member that can rotate.

[0009] Further, the inner side edge and the outer side edge of the framework are both located in the elastic sealing part.

[0010] The sealing lip is located on one side of the axial direction of the elastic sealing part, and the sealing lip is an annular structure arranged along the circumferential direction of the elastic sealing part.

[0011] Further, in the axial direction of the elastic sealing part, the width of the radial section of the sealing lip edge is gradually reduced in the direction away from the elastic sealing part; and / or,

[0012] In the axial direction of the elastic sealing part, the radial section of the end of the sealing lip edge away from the elastic sealing part is wavy.

[0013] Further, the skeleton is made of a metal plate or a plastic plate; and / or,

[0014] The elastic sealing part is made of rubber.

[0015] Compared with the prior art, the utility model has the following advantages:

[0016] The skeleton and the elastic sealing part of the sealing device cooperate to seal the space between the first member and the second member, the sealing effect of the sealing device is improved by the sealing lip edge, the skeleton provides good structural strength for the elastic sealing part, the design is easy to implement, the elastic sealing part can be compressed and deformed due to its elasticity, the sealing lip edge can form good dynamic sealing with the rotatable first member or the rotatable second member to obtain good sealing effect, and when the sealing device is used in a scroll compressor, a back pressure cavity can be formed to reduce the friction and wear between the dynamic disc and the middle body and improve the use quality of the compressor.

[0017] The inner side edge and the outer side edge of the skeleton are located in the elastic sealing part, the sealing effect of the sealing device is better, the sealing lip edge has a ring structure, the dynamic sealing effect is better, the sealing device is easy to process, and the design is easy to implement.

[0018] The radial section of the sealing lip edge is gradually reduced in the direction away from the elastic sealing part or the radial section of the sealing lip edge is wavy, the sealing cooperation between the sealing lip edge and the first member and the second member is facilitated, dynamic sealing is better, and the design is easy to implement.

[0019] The skeleton is made of a metal plate or a plastic plate, the structural strength is guaranteed, the processing and manufacturing are facilitated, and the design is easy to implement. The elastic sealing part is made of rubber, the processing and manufacturing are facilitated, and the design is easy to implement.

[0020] Meanwhile, the utility model also proposes a compressor sealing structure, including setting in the bearing one side of compressor's sealing device such as above-mentioned;

[0021] The sealing device is limited by the limiting part on one side of the bearing, and the first member is the outer ring of the bearing, and the second member is the inner ring of the bearing.

[0022] Further, the sealing device is provided with a pressure relief hole.

[0023] The pressure relief hole penetrates the sealing device along the axial direction of the sealing device and communicates with the space between the inner ring and the outer ring of the bearing.

[0024] Further, the limiting part comprises a limiting member on one side of the bearing, which abuts on the sealing device and limits the sealing device on one side of the bearing.

[0025] Further, the limiting member comprises any one of a ring-shaped protrusion, a snap spring, a check ring or a ring.

[0026] Further, the limiting part comprises a limiting groove provided on the inner ring and the outer ring of the bearing, and the sealing device is arranged between the oppositely arranged limiting grooves.

[0027] The compressor sealing structure in the utility model is combined with the bearing on one side of the bearing by the sealing device, so that the sealing effect required by the shaft seal can be realized, the limiting part is arranged, the assembly of the shaft seal structure is facilitated, the space occupied by the compressor sealing structure can be saved when the shaft seal structure is assembled in the compressor, the utilization rate of the internal space of the compressor is improved, and the use quality of the compressor is improved.

[0028] The space on both sides of the bearing is communicated by the pressure relief hole, the flow of the lubricating material in the bearing is facilitated, the pressure in the back pressure cavity can be released, the lubricating material is guided to flow through the bearing, the bearing is lubricated and cooled, and the service life of the bearing is prolonged.

[0029] The limiting member is arranged, the versatility of the shaft seal structure is improved, and the design is implemented.

[0030] The limiting groove is arranged, the sealing device is better integrated in the bearing, the processing and manufacturing are facilitated, and the design is implemented.

[0031] The utility model also provides a compressor, the compressor is scroll compressor, the compressor is provided with the compressor sealing structure, and the back pressure cavity is formed on one side of the bearing in the compressor by the compressor sealing structure.

[0032] The compressor has the same beneficial effects as the compressor sealing structure and the sealing device, and thus the description is not repeated here. BRIEF DESCRIPTION OF DRAWINGS

[0033] The accompanying drawings, which form a part of this patent, are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and serve to explain the principles of the present application. In the drawings:

[0034] Figure 1 Structure diagram of the sealing device;

[0035] Figure 2 Structure diagram of the sealing device; Figure 1 Enlarged view of A in

[0036] Figure 3 First structure diagram of the compressor sealing structure;

[0037] Figure 4 Second structure diagram of the compressor sealing structure;

[0038] Figure 5 Third structure diagram of the compressor sealing structure;

[0039] Figure 6 Enlarged view of B in Figure 5

[0040] Figure 7 Fourth structure diagram of the compressor sealing structure;

[0041] Legend of reference signs:

[0042] 1, first component; 2, second component; 3, skeleton; 4, elastic sealing part; 5, sealing lip; 6, bearing; 7, pressure relief hole;

[0043] 8, limiting part; 801, annular protrusion; 802, clasp spring;

[0044] 9, limiting groove; 901, inner limiting groove; 902, outer limiting groove;

[0045] 10, middle machine body; 11, main shaft;

[0046] s, back pressure cavity; t, suction cavity. DETAILED DESCRIPTION

[0047] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0048] ​In the description of the utility model, it is necessary to explain, if appearing "upper", "lower", "internal", "external" and so on indicate the orientation or positional relation term, it is based on the orientation or positional relation shown in the drawing, only is for the convenience of describing the utility model and simplifying the description, and is not indicate or imply the device or element indicated must have a particular orientation, with a particular orientation structure and operation, therefore cannot be understood as the restriction of the utility model. In addition, if appearing "first", "second" and so on term, it also only is used for the description purpose, and cannot be understood as indicating or implying relative importance.

[0049] In addition, in the description of the utility model, unless otherwise expressly limited, the term "mounting", "connection", "connection" "connecting piece" should be broadly understood. For example, it can be fixedly connected, and can be detachably connected, or integrally connected, can be mechanically connected, or electrically connected, can be directly connected, or indirectly connected through intermediate medium, can be the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above-mentioned terms in the utility model can be understood in combination with specific circumstances.

[0050] The utility model will be described in detail below with reference to the drawings and in combination with embodiments.

[0051] Embodiment one

[0052] The embodiment relates to a sealing device, so as to improve the use quality of the compressor by optimizing the structure of the sealing device.

[0053] As a whole, as shown in Figure 1 And Figure 2 The sealing device in the embodiment is used for sealing the space between the first member 1 and the second member 2 capable of relative rotation, and the sealing device comprises a framework 3 and an elastic sealing part 4.

[0054] Wherein, the framework 3 and the elastic sealing part 4 are annular structures, and the elastic sealing part 4 is covered on the framework 3, and the sealing lip 5 is arranged on the elastic sealing part 4. When the sealing device is limited to seal the space between the first member 1 and the second member 2, the sealing lip 5 is pressed on the first member 1 or the second member 2 capable of rotation.

[0055] As arranged above, the skeleton 3 and the elastic sealing part 4 of the sealing device in the embodiment cooperate to seal the space between the first component 1 and the second component 2, the dynamic sealing effect of the sealing device can be increased by arranging the sealing lip 5, the skeleton 3 can provide good structural strength for the elastic sealing part 4, which is conducive to design and implementation, the elastic sealing part 4 can be compressed and deformed due to its elasticity, and a better dynamic seal can be formed between the sealing lip 5 and the rotatable first component 1 or the rotatable second component 2 through the sealing lip 5 to obtain a better sealing effect, and when the sealing device is used in a scroll compressor, a back pressure cavity s can be formed, which can reduce the friction and wear between the dynamic plate and the middle machine body 10 to improve the use quality of the compressor.

[0056] It should be noted that in the prior art, an additional shaft seal is arranged between the middle machine body 10 and the main shaft 11, and a closed back pressure cavity s is formed between the back of the dynamic plate, the middle machine body 10 and the main shaft 11 through the sealing cooperation between the shaft seal and the middle machine body 10 and the main shaft 11. By introducing a continuous supply of high-pressure gas into the back pressure cavity s, the pressure in the back pressure cavity s is higher than the back pressure in the suction cavity t, so as to offset the axial gas force acting on the back of the dynamic plate, thereby reducing the contact force between the dynamic plate and the supporting surface of the middle machine body 10, and achieving the purpose of reducing friction and wear.

[0057] However, the increase of the independent shaft seal part and the possible axial fixed retainer directly leads to the increase of the number of parts of the compressor as a whole, thereby increasing the manufacturing cost and assembly difficulty, and the independent shaft seal part needs additional arrangement space, which is not conducive to improving the utilization rate of the internal space of the compressor and is not conducive to improving the use quality of the compressor.

[0058] Taking the application of the sealing device in the embodiment to a scroll compressor as an example, the sealing device can be assembled on one side of the bearing 6, at this time the first component 1 is the outer ring of the bearing 6, and the second component 2 is the inner ring of the bearing 6. The space between the inner ring and the outer ring of the bearing 6 is sealed by the sealing device, which can form a back pressure cavity s to reduce the friction and wear between the dynamic plate and the middle machine body 10, and can also not arrange an axial fixed retainer, which is helpful to improve the space utilization rate in the compressor on the basis of ensuring the sealing effect, and is conducive to improving the use quality of the compressor.

[0059] As a preferred exemplary structure, in order to facilitate the processing and manufacturing of the sealing device, the inner side edge and the outer side edge of the skeleton 3 in the embodiment are located in the elastic sealing part 4, and the sealing lip 5 is located on one side of the elastic sealing part 4 in the axial direction, and the sealing lip 5 is arranged in a ring structure along the circumferential direction of the elastic sealing part 4. The inner side edge and the outer side edge of the skeleton 3 are located in the elastic sealing part 4, which can better guarantee the sealing effect of the sealing device, the sealing lip 5 is in a ring structure, which is conducive to providing better dynamic sealing effect, and is conducive to the processing and manufacturing of the sealing device and the design and implementation.

[0060] Specifically, the skeleton 3 in the embodiment is made of a metal plate or a plastic plate, for example, any one of an iron plate, a copper plate, an aluminum plate or a polymer plastic plate, so as to improve the structural strength of the sealing device and facilitate the assembly of the sealing device in a pressure environment.

[0061] In order to improve the sealing effect of the sealing device, the width of the radial section of the sealing lip 5 in the axial direction of the elastic sealing part 4 is gradually reduced in the direction away from the elastic sealing part 4. The radial section of the sealing lip 5 is gradually reduced in the direction away from the elastic sealing part 4, which facilitates the sealing cooperation between the sealing lip 5 and the first member 1 and the second member 2, and better realizes dynamic sealing, which is beneficial to design and implementation.

[0062] In order to improve the sealing effect of the sealing device, in combination with Figure 1 and Figure 2 shown, the radial section of the sealing lip 5 of the sealing device in the embodiment is in the axial direction of the elastic sealing part 4, and the radial section of the sealing lip 5 away from the elastic sealing part 4 is in a wave shape. The radial section of the sealing lip 5 is in a wave shape, which facilitates the sealing cooperation between the sealing lip 5 and the first member 1 and the second member 2, and better realizes dynamic sealing, which is beneficial to design and implementation.

[0063] Specifically, the elastic sealing part 4 in the embodiment is made of rubber, which facilitates processing and manufacturing and is helpful for design and implementation. The elastic sealing part 4 is vulcanized on the end face of the skeleton 3 and is integrated with the skeleton 3. The inner ring end and the outer ring end of the skeleton 3 are accommodated in the elastic sealing part 4, which facilitates the processing and manufacturing of the sealing device and reduces the risk of the skeleton 3 coming out of the elastic sealing part 4, thereby helping to maintain the structure of the sealing device and facilitating design and implementation.

[0064] In more detail, when the sealing device seals the space between the first member 1 and the second member 2, the sealing lip 5 is compressed and deformed, has a certain pre-compression amount, and has a tendency to restore to its original state due to its own elasticity, so that the sealing lip 5 can be tightly abutted on the first member 1 and the second member 2, thereby helping to maintain the sealing of the sealing device on the first member 1 and the second member 2.

[0065] The sealing device of the embodiment has good structural strength due to the setting of the skeleton 3, and facilitates the sealing assembly of the sealing device on the first member 1 and the second member 2 due to the setting of the compressible sealing lip 5. When the sealing device is set in a compressor, an axial fixed check ring can not be set, which helps to improve the space utilization of the compressor on the basis of ensuring the sealing effect, and improves the use quality of the compressor.

[0066] Embodiment Two

[0067] This embodiment relates to a compressor sealing structure, which is combined with Figures 3 to 7 As shown in the figure, the sealing device in Embodiment One is arranged on one side of the bearing 6 in the compressor.

[0068] Wherein, the sealing device is limited by the limiting part on one side of the bearing 6, and the first component 1 is the outer ring of the bearing 6, and the second component 2 is the inner ring of the bearing 6.

[0069] As arranged above, the compressor sealing structure in this embodiment is combined with the sealing device in Embodiment One and the sealing device is arranged on one side of the bearing 6 to form the compressor sealing structure, which can achieve the sealing effect required by the shaft seal, and the arrangement of the limiting part facilitates the assembly of the shaft seal structure. When the shaft seal structure is assembled in the compressor, it can save the space occupied by the compressor sealing structure, which is conducive to improving the utilization rate of the internal space of the compressor and improving the use quality of the compressor.

[0070] In order to facilitate the lubrication of the bearing 6, in combination with Figure 6 As shown in the figure, the sealing device of the compressor sealing structure in this embodiment is provided with a pressure relief hole 7, which penetrates the sealing device along the axial direction of the sealing device and communicates with the space between the inner ring and the outer ring of the bearing 6. Through the arrangement of the pressure relief hole 7, it is convenient for the lubricating material in the bearing 6 to flow, which can release the pressure in the back pressure cavity s, and is conducive to guiding the lubricating material to flow through the bearing 6 to lubricate and cool the bearing 6, which is helpful to prolong the service life of the bearing 6.

[0071] It should be noted that the number of pressure relief holes 7 in this embodiment is generally one to two, and the diameter of the pressure relief hole 7 is generally 0.3mm-0.5mm. For example, 0.3mm, 0.4mm or 0.5mm can be used in specific implementation, as long as it can slightly release pressure. Since the high-pressure gas in the back pressure cavity s is continuously injected, even if the pressure relief hole 7 is provided, the pressure difference between the back pressure cavity s and the suction cavity t will not disappear, so the pressure of the back pressure cavity s will be greater than that of the suction cavity t, thereby offsetting the axial gas force acting on the back of the dynamic disc, thereby reducing the contact force between the dynamic disc and the support surface of the middle machine body 10, and achieving the purpose of reducing friction and wear.

[0072] In order to better adapt to different arrangement positions of the sealing device, in combination with Figures 5 to 7 As shown in the figure, the limiting part of the shaft seal structure in this embodiment includes a limiting piece 8 located on one side of the bearing 6, which abuts against the sealing device and limits the sealing device on one side of the bearing 6. Through the arrangement of the limiting piece 8, it is conducive to realizing various assembly modes of the compressor sealing structure on the main shaft 11, which can better improve the universality of the shaft seal structure and is conducive to design implementation.

[0073] Specifically, in combination with Figure 5 and Figure 6 shown, the limiting member 8 in the embodiment can be a ring-shaped protrusion 801 extending from the middle body 10 to the bearing 6, or an arc-shaped protrusion arranged along the inner wall of the middle body 10 and spaced circumferentially between the middle body 10 and the sealing device, the outermost end of the limiting member 8 abutting against the sealing device to press the sealing device against the bearing 6, thereby facilitating the sealing effect of the sealing device on the space between the inner and outer rings of the bearing 6.

[0074] Of course, the limiting member 8 can also be a circlip 802, a retaining ring, or a ring arranged on the middle body 10, as long as it can constrain the sealing device between the bearing 6 and the middle body 10 and seal the bearing 6.

[0075] In order to improve the abutting strength between the limiting member 8 and the sealing device, the limiting member 8 overlaps with the skeleton 3 in the axial direction of the sealing device, and abuts against the elastic sealing portion 4 of the sealing device to better withstand the axial force generated by the pressure difference between the back pressure cavity s and the suction cavity t.

[0076] In order to facilitate the integration of the sealing device in the bearing 6, in combination with Figure 4 and Figure 6 shown, the limiting portion of the shaft sealing structure in the embodiment includes a limiting groove 9 arranged in the bearing 6, which constrains the sealing device between the inner and outer rings of the bearing 6 to form a seal for the bearing 6. The arrangement of the limiting groove 9 facilitates the better integration of the sealing device in the bearing 6 and facilitates processing and manufacturing, which is helpful for design implementation.

[0077] Specifically, the limiting groove 9 includes an inner limiting groove 901 arranged in the inner ring of the bearing 6 and an outer limiting groove 902 arranged in the outer ring of the bearing 6, and the sealing lip 5 of the sealing device is accommodated in the inner limiting groove 901 and the outer limiting groove 902. Preferably, the radial cross section of the limiting groove 9 is trapezoidal, which facilitates the dynamic sealing of the sealing lip 5 on the bearing 6.

[0078] It should be noted that the limiting portion can adopt the limiting member 8, the limiting groove 9, or a combination of the limiting member 8 and the limiting groove 9, as long as the limiting portion can press the sealing device against the bearing 6 to seal the space between the inner and outer rings of the bearing 6 according to the assembly position of the bearing 6 on the main shaft 11.

[0079] The shaft sealing structure in the embodiment can realize different compressor sealing structure implementations by changing the assembly position relationship between the sealing device and the bearing 6 when in use.

[0080] Specifically, the first shaft sealing structure of the embodiment, in combination withFigure 3 As shown, the sealing device is assembled between the middle machine body 10 and the bearing 6, the bearing 6 is sleeved on the main shaft 11, at this time, one side of the elastic sealing part 4 of the sealing device abuts against the middle machine body 10, and the sealing lip 5 abuts against the end face of the inner ring of the bearing 6, at this time, the sealing device is constrained between the middle machine body 10 and the bearing 6 by the bearing 6, and the sealing of the air suction cavity t and the back pressure cavity s is realized.

[0081] The second shaft sealing structure of the embodiment is used in combination with Figure 4 As shown, the sealing device is assembled inside the bearing 6, the bearing 6 is internally provided with a limiting groove 9, and the sealing lip 5 is located in the limiting groove 9 inside the bearing 6, and in cooperation therewith, the end face of the inner side of the middle machine body 10 towards the bearing 6 is provided with an annular protrusion 801, the annular protrusion 801 abuts against the elastic sealing part 4 of the sealing device, and the annular protrusion 801 and the framework 3 have an overlapping area in the axial direction of the sealing device, at this time, the sealing device is constrained between the bearing 6 and the middle machine body 10 by the annular protrusion 801, and the sealing of the air suction cavity t and the back pressure cavity s is realized. The setting mode of the arc-shaped protrusion is similar to that of the annular protrusion 801, and thus is not described herein again.

[0082] The third shaft sealing structure of the embodiment is used in combination with Figure 5 and Figure 6 As shown, the sealing device is assembled inside the bearing 6, the bearing 6 is internally provided with a limiting groove 9, and the sealing lip 5 is located in the limiting groove 9 inside the bearing 6, and in cooperation therewith, the end face of the inner side of the middle machine body 10 towards the bearing 6 is provided with an annular protrusion 801, the annular protrusion 801 abuts against the elastic sealing part 4 of the sealing device, and the annular protrusion 801 and the framework 3 have an overlapping area in the axial direction of the sealing device, at this time, the sealing device is constrained between the bearing 6 and the middle machine body 10 by the annular protrusion 801, and the sealing of the air suction cavity t and the back pressure cavity s is realized. The setting mode of the arc-shaped protrusion is similar to that of the annular protrusion 801, and thus is not described herein again.

[0083] The fourth shaft sealing structure of the embodiment is used in combination with Figure 7 As shown, the sealing device is assembled inside the bearing 6, the bearing 6 is internally provided with a limiting groove 9, and the sealing lip 5 is located in the limiting groove 9 inside the bearing 6, and a snap spring 802 is arranged between the sealing device and the middle machine body 10, the middle machine body 10 is provided with a containing groove, the outer end of the snap spring 802 is accommodated in the containing groove, and the inner end of the snap spring 802 abuts against the elastic sealing part 4 of the sealing device, at this time, the sealing device is constrained between the bearing 6 and the middle machine body 10 by the snap spring 802, and the sealing of the air suction cavity t and the back pressure cavity s is realized. The setting mode of the stop ring or the ring is similar to that of the snap spring 802, and thus is not described herein again.

[0084] Regardless of the above-mentioned shaft seal structure, the shaft seal structure in the embodiment can realize the sealing of the suction cavity t and the back pressure cavity s when the bearing 6 is assembled on the main shaft 11, and is beneficial to the maintenance of the pressure difference between the back pressure cavity s and the suction cavity t, thereby reducing the wear of the compressor and improving the use quality of the compressor.

[0085] Embodiment three

[0086] The embodiment relates to a compressor, which is a scroll compressor, and the compressor seal structure in the embodiment two is arranged in the compressor, and the back pressure cavity s on the side of the bearing 6 is formed in the compressor through the compressor seal structure in the embodiment two.

[0087] The compressor in the embodiment can guarantee the sealing between the suction cavity t and the back pressure cavity s through the arrangement of the compressor seal structure in the embodiment two, thereby being beneficial to the maintenance of the pressure difference between the back pressure cavity s and the suction cavity t, reducing the wear of the compressor, and improving the use quality of the compressor.

[0088] The above-mentioned is only the preferred embodiment of the utility model, and does not limit the utility model, and any modification, equivalent replacement, improvement and the like made in the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1.A compressor sealing structure, characterized in that: a sealing device is arranged on one side of a bearing (6) in a compressor, and the sealing device comprises a skeleton (3) and an elastic sealing part (4); the skeleton (3) and the elastic sealing part (4) are both annular structures, and the elastic sealing part (4) is wrapped on the skeleton (3) and is provided with a sealing lip (5) on the elastic sealing part (4); when the sealing device is positioned to seal a space between a first component (1) and a second component (2), the sealing lip (5) is pressed against the first component (1) or the second component (2) which can rotate; the sealing device is positioned on one side of the bearing (6) by a limiting part, the first component (1) is an outer ring of the bearing (6), and the second component (2) is an inner ring of the bearing (6); the sealing device is provided with a pressure relief hole (7) which penetrates the sealing device along an axial direction of the sealing device and communicates with a space between the inner ring and the outer ring of the bearing (6). 2.The compressor sealing structure according to claim 1, characterized in that: inner and outer side edges of the skeleton (3) are both located in the elastic sealing part (4); the sealing lip (5) is located on one side of the elastic sealing part (4) in the axial direction, and the sealing lip (5) is an annular structure arranged along a circumferential direction of the elastic sealing part (4). 3.The compressor sealing structure according to claim 2, characterized in that: in the axial direction of the elastic sealing part (4), the width of a radial cross section of the sealing lip (5) gradually decreases in a direction away from the elastic sealing part (4); and / or, in the axial direction of the elastic sealing part (4), a radial cross section of one end of the sealing lip (5) away from the elastic sealing part (4) is in a wave shape. 4.The compressor sealing structure according to any one of claims 1 to 3, characterized in that: the skeleton (3) is made of a metal plate or a plastic plate; and / or, the elastic sealing part (4) is made of rubber. 5.The compressor sealing structure according to claim 1, characterized in that: the limiting part comprises a limiting piece (8) arranged on one side of the bearing (6), and the limiting piece (8) abuts against the sealing device and positions the sealing device on one side of the bearing (6). 6.The compressor sealing structure according to claim 5, characterized in that: the limiting piece (8) comprises any one of an annular protrusion (801), a snap spring (802), a check ring or a ring. 7.The compressor sealing structure according to claim 1, characterized in that: the limiting part comprises limiting grooves (9) arranged on the inner ring and the outer ring of the bearing (6) correspondingly, and the sealing device is arranged between the oppositely arranged limiting grooves (9). 8.A compressor, characterized in that: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ The compressor is a scroll compressor, the compressor is provided with the compressor sealing structure in any one of claims 1-7, and a back pressure cavity (s) is formed on the side of the bearing (6) in the compressor through the compressor sealing structure.

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