A sealing mechanism, compressor and sealing ring replacement method

Abstract

The application discloses a sealing mechanism, a compressor and a sealing ring replacement method, and belongs to the technical field of compressors.The sealing mechanism comprises a sealing assembly arranged at the end of a casing and an end cover, the sealing assembly comprises a sealing seat, an elastic sealing ring and a bolt mechanism, the sealing seat is provided with the sealing ring between the sealing seat and the casing and between the sealing seat and the end cover, the sealing seat is detachably connected with the casing and the end cover through the bolt, and extrusion is applied to the sealing ring to realize sealing.The application forms an effective sealing barrier through the elastic sealing ring between the sealing seat and the casing and the end cover, the bolt mechanism ensures uniform deformation of the sealing ring and maintains sealing stability, only the sealing assembly and the middle section of a shaft coupling need to be disassembled during replacement, the end cover or adjacent components do not need to be disassembled, positioning deviation of a rotor axis is avoided, maintenance damage risk is significantly reduced, an operation process is simplified, downtime is shortened, human and spare part consumption is reduced, equipment service life is prolonged, timely maintenance capability is ensured, and the stability of compressor operation is continuously maintained.

Description

Technical Field

[0001] This invention relates to the field of compressor technology, and more specifically to a sealing mechanism, a compressor, and a method for replacing sealing rings. Background Technology

[0002] In traditional compressor structures, the sealing ring is usually installed in a small, enclosed space. Replacing it requires disassembling a large number of adjacent components, such as the compressor body or peripheral equipment. The disassembly and assembly process is complex, requires professional personnel, and consumes a lot of time and labor costs. At the same time, disassembly can easily damage other components, increasing maintenance costs. Due to the difficulty of disassembly, leaks in the sealing ring cannot be dealt with in a timely manner, which may lead to equipment failure or performance degradation. This invention proposes a new solution to the above problems. Summary of the Invention

[0003] To overcome at least one of the aforementioned drawbacks, this invention provides a sealing mechanism, a compressor, and a method for replacing the sealing ring. The objective of this invention can be achieved by employing the following technical solution: A first aspect of this application provides a sealing mechanism applied to a compressor, the compressor including a housing and a core located entirely inside the housing, the core including a stator and end caps disposed at both ends of the stator, the end caps contacting the housing to form an annular sealing surface, the sealing mechanism including a sealing assembly disposed at the ends of the housing and the end caps, the sealing assembly including a sealing seat, an elastic sealing ring and a bolt mechanism, the sealing ring being disposed between the sealing seat and the housing and between the sealing seat and the end caps, the sealing seat being detachably connected to the housing and the end caps by the bolt mechanism, and applying pressure to the sealing ring to achieve a seal.

[0004] In one possible implementation, the end face of the housing facing the drive end is flush with the end face of the end cover facing the drive end, the sealing assembly is disposed on the annular sealing surface of the housing and the end cover facing the drive end, the annular sealing surface is parallel to the outer wall of the housing, and the sealing seat is annular and perpendicular to the annular sealing surface.

[0005] In one possible implementation, a portion of the sealing seat is projected in a vertical plane within the area of ​​the housing, and another portion of the sealing seat is projected in a vertical plane within the area of ​​the end cap.

[0006] In one possible implementation, the bolt mechanism includes a plurality of first bolts spaced circumferentially in the outer region of the sealing seat and a plurality of second bolts spaced circumferentially in the inner region of the sealing seat. The sealing seat is detachably connected to the housing via the first bolts and detachably connected to the end cap via the second bolts.

[0007] In one possible implementation, the sealing seat has a plurality of first engagement holes for the first bolt to pass through, and the housing has a plurality of first threaded holes corresponding to the first bolt, the first bolt being arranged along the axial direction of the housing. The sealing seat has several second engagement holes for the second bolt to pass through, and the housing has several second threaded holes corresponding to the second bolt. The second bolt is arranged along the axial direction of the housing.

[0008] In one possible implementation, the sealing ring covers and seals the annular sealing surface, with a portion of the sealing ring projected onto the vertical plane within the area of ​​the housing, and another portion of the sealing ring projected onto the vertical plane within the area of ​​the end cap.

[0009] In one possible implementation, a sealing cavity is formed between the sealing seat and the sealing ring to cover and seal the annular sealing surface. At least one first sealing ring is provided between the sealing seat and the housing, and at least one second sealing ring is provided between the sealing seat and the end cover. The diameter of the second sealing ring is smaller than the diameter of the first sealing ring, and the second sealing ring is located inside the first sealing ring.

[0010] A second aspect of this application provides a compressor, comprising: The sealing mechanism as described in any one of the first aspects; and, The mechanism comprises a housing and a movement, wherein the movement is located entirely inside the housing. The movement includes a stator and end caps disposed at both ends of the stator. The end caps do not protrude from the ends of the housing. The end caps contact the housing to form an annular sealing surface. A sealing mechanism covers and seals the annular sealing surface. The sealing mechanism is detachably connected to the housing and the end caps.

[0011] In one possible implementation, a rotor is included, which is disposed inside the stator. The drive end of the stator is used to connect with a coupling. The coupling includes a first connecting section, an intermediate section, and a second connecting section connected in sequence. The intermediate section is detachably connected to both the first and second connecting sections. The intermediate section can be disassembled to form a channel for the sealing assembly to pass through.

[0012] A third aspect of this application provides a method for replacing a sealing ring, applicable to a sealing mechanism as described in any one of the first aspects, or applicable to a compressor as described in any one of the first aspects, wherein the steps of the sealing ring replacement method include: The bolt loosening mechanism is used to disassemble the sealing seat of the sealing assembly and lift it, and to disassemble the middle section of the coupling; After replacing the sealing ring by passing it through the exposed channel of the disassembled intermediate section, the sealing seat and the intermediate section are reinstalled. The tightening bolt mechanism causes the sealing seat to press the sealing ring against the sealing surfaces of the housing and end cover to form a seal.

[0013] The beneficial technical effects of this invention are as follows: According to this disclosure, the sealing mechanism includes a sealing assembly disposed at the ends of the housing and the end cover. The sealing assembly includes a sealing seat, an elastic sealing ring, and a bolt mechanism. Elastic sealing rings are disposed between the sealing seat and the housing, and between the sealing seat and the end cover, forming a sealing barrier that effectively covers and seals the sealing surfaces of the housing and the end cover, significantly reducing the risk of media leakage. The adjustable extrusion force provided by the bolt mechanism causes the sealing ring to deform uniformly, adapting to the sealing requirements under different working conditions and ensuring long-term sealing stability. The sealing seat is detachably connected to the housing and the end cover through the bolt mechanism. When replacing the sealing ring, only the sealing ring seat and the middle section of the coupling need to be disassembled, without the need to completely disassemble the end cover or adjacent components, reducing the risk of accidental damage to other components during maintenance. The disassembly process does not interfere with the axial positioning of the compressor rotor and the speed reducer, avoiding the accuracy deviation problem caused by traditional disassembly and assembly, simplifying the operation process, shortening maintenance time, reducing equipment downtime losses, reducing manpower input and spare parts consumption, extending the overall service life of the compressor, improving timely maintenance capabilities, ensuring good sealing performance, and continuously maintaining the stability of compressor operation. Attached Figure Description

[0014] The following are given by way of example and without limitation in the accompanying drawings: Figure 1 A cross-sectional view of the compressor according to an embodiment of the present invention is shown; Figure 2 The present invention is shown. Figure 1 Enlarged schematic diagram of part A; Figure 3 A schematic diagram of the unfolded structure of the sealing assembly according to an embodiment of the present invention is shown; Figure 4 It shows Figure 3 Partial structural diagram; Figure 5 A schematic diagram of the sealing seat according to an embodiment of the present invention is shown; Figure 6 A structural cross-sectional view of a vertically split compressor in the prior art is shown; Figure 7 A schematic diagram of the assembly structure of the drive unit, speed reducer, and compressor is shown.

[0015] In the diagram: 1. Housing; 11. First screw hole; 2. Mechanism; 21. End cover; 211. Second screw hole; 22. Stator; 3. Sealing assembly; 31. Sealing seat; 32. Sealing ring; 33. First mating hole; 34. First bolt; 35. Second mating hole; 36. Second bolt; 37. Lifting ring; 4. Rotor; 5. Coupling; 51. First connecting section; 52. Intermediate section; 53. Second connecting section; 100. Sealing surface. Detailed Implementation

[0016] In the following detailed disclosure, these embodiments are fully described with reference to the accompanying drawings. In order to enable those skilled in the art to understand and clarify the technical solution of the present invention more clearly, the embodiments described below are not limited thereto. The present invention will be further described in detail below with reference to the embodiments and the accompanying drawings.

[0017] In this invention, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; the term "multiple" refers to two or more unless otherwise explicitly defined. The terms "install," "connect," "link," and "fix" should be interpreted broadly. For example, "connect" can be a fixed connection, a detachable connection, or an integral connection; "link" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0018] In the description of this invention, it should be understood that the terms "upper," "lower," "left," "right," "front," "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or unit referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0019] like Figure 6 As shown, a traditional compressor mainly consists of a casing, end covers, a core, bearings, and sealing components. The casing adopts a vertically split design, and the casing and end covers are connected by bolts to form the main pressure-bearing structure. In traditional compressor designs, the end covers are disassembled from both ends outwards. Sufficient disassembly space is required, especially when replacing the seals on the drive end. Figure 7 As shown, the gearbox and intermediate pipeline need to move simultaneously, which can easily disrupt the original axial positioning of the drive motor and gearbox, and the gearbox and compressor.

[0020] The first aspect of this application, as Figures 1-5As shown, a sealing mechanism is provided for a compressor. The compressor includes a housing 1 and a core 2 located entirely inside the housing 1. The core 2 includes a stator 22 and end caps 21 disposed at both ends of the stator 22. The end caps 21 contact the housing 1 to form an annular sealing surface 100. The sealing mechanism includes a sealing assembly 3 disposed at the ends of the housing 1 and the end caps 21. The sealing assembly 3 includes a sealing seat 31, an elastic sealing ring 32, and a bolt mechanism. The sealing rings 32 are provided between the sealing seat 31 and the housing 1 and between the sealing seat 31 and the end caps 21. The sealing seat 31 is detachably connected to the housing 1 and the end caps 21 by the bolt mechanism and applies pressure to the sealing rings 32 to achieve a seal.

[0021] The sealing mechanism provided in this embodiment includes a sealing assembly 3 disposed at the ends of the housing 1 and the end cover 21. The sealing assembly 3 includes a sealing seat 31, an elastic sealing ring 32, and a bolt mechanism. Elastic sealing rings 32 are disposed between the sealing seat 31 and the housing 1, and between the sealing seat 31 and the end cover 21, forming a sealing barrier that effectively covers and seals the sealing surface 100 of the housing 1 and the end cover 21, significantly reducing the risk of media leakage. The adjustable extrusion force provided by the bolt mechanism causes the sealing ring 32 to deform uniformly, adapting to the sealing requirements under different working conditions and ensuring long-term sealing stability.

[0022] The sealing mechanism provided in this embodiment has a sealing seat 31 that is detachably connected to the housing 1 and end cover 21 via bolts. When replacing the sealing ring 32, only the sealing ring 32 seat and the middle section 52 of the coupling 5 need to be removed. There is no need to completely disassemble the end cover 21 or adjacent components, which reduces the risk of accidental damage to other parts during maintenance. The disassembly process does not interfere with the axial positioning of the compressor rotor 4 and the speed reducer, avoiding the accuracy deviation problem caused by traditional disassembly and assembly. It simplifies the operation process, shortens the maintenance time, reduces equipment downtime losses, reduces manpower input and spare parts consumption, extends the overall service life of the compressor, improves the ability to maintain timely maintenance, ensures good sealing performance, and continuously maintains the stability of compressor operation.

[0023] In one possible implementation, such as Figures 1-4 As shown, the end face of the housing 1 facing the drive end is flush with the end face of the end cover 21 facing the drive end. The sealing assembly 3 is disposed on the annular sealing surface 100 of the housing 1 and the end cover 21 facing the drive end. The annular sealing surface 100 is parallel to the outer wall of the housing 1. The sealing seat 31 is annular and perpendicular to the annular sealing surface 100.

[0024] Among them, the sealing seat 31 is perpendicular to the annular sealing surface 100, ensuring that the sealing ring 32 is completely fitted with the housing 1 and the end cover 21, forming a gapless sealing barrier, effectively blocking the medium leakage path. The vertically arranged sealing seat 31 can be directly removed from the drive end without adjusting the position of the housing 1 or the end cover 21, simplifying the replacement process of the sealing assembly 3 and reducing the risk of interference to adjacent components.

[0025] Among them, the sealing component 3 can be set on the side facing the drive end, which can realize the disassembly and assembly of the mechanism on one side in the non-drive end direction without moving the gearbox and intermediate pipeline, thus avoiding damage to the original axis positioning of the drive and gearbox, and the gearbox and compressor, and ensuring positioning accuracy.

[0026] In one possible implementation, such as Figure 1 and Figure 2 As shown, the projection of a portion of the sealing seat 31 onto the vertical plane is within the area of ​​the housing 1, and the projection of another portion of the sealing seat 31 onto the vertical plane is within the area of ​​the end cover 21.

[0027] The vertical projection of the sealing seat 31 covers both the housing 1 and the end cover 21, ensuring that the sealing ring 32 is fully matched with the sealing surfaces 100 of both, forming a continuous and uninterrupted sealing barrier that effectively blocks the leakage path of the medium. The sealing force of the sealing ring 32 is evenly transmitted to the housing 1 and the end cover 21 through the sealing seat 31, avoiding local stress concentration and improving the stability of the overall structure. As a transitional connector between the housing 1 and the end cover 21, the overlapping part of the sealing seat 31 provides a clear positioning reference for assembly, reducing the risk of installation deviation.

[0028] In one possible implementation, such as Figures 1-4 As shown, the bolt mechanism includes a plurality of first bolts 34 spaced circumferentially in the outer region of the sealing seat 31 and a plurality of second bolts 36 spaced circumferentially in the inner region of the sealing seat 31. The sealing seat 31 is detachably connected to the housing 1 by the first bolts 34 and to the end cover 21 by the second bolts 36.

[0029] In this design, the first bolt 34 on the outer side of the sealing seat 31 connects to the housing 1, while the second bolt 36 on the inner side connects to the end cover 21, forming a zoned stress-bearing structure. This avoids localized stress concentration and improves overall structural stability. The circumferential spacing of the bolts ensures uniform pressure on the sealing surfaces 100 between the sealing seat 31 and the housing 1 or end cover 21. Combined with an elastic sealing ring 32 (such as an O-ring), this forms a continuous sealing barrier, adapting to vibration or thermal deformation conditions. The zoned bolt design distributes the load, reducing the risk of single-point fatigue. Adjustable compressive force is achieved through bolt pre-tightening, ensuring long-term stable deformation of the sealing ring 32 and extending equipment life.

[0030] In one possible implementation, such as Figures 2-5As shown, the sealing seat 31 has several first engagement holes 33 for the first bolt 34 to pass through, and the housing 1 has several first screw holes 11 corresponding to the first bolt 34. The first bolt 34 is arranged along the axial direction of the housing 1. The sealing seat 31 has several second engagement holes 35 for the second bolt 36 to pass through, and the housing 1 has several second screw holes 211 corresponding to the second bolt 36. The second bolt 36 is arranged along the axial direction of the housing 1.

[0031] The first bolt 34 and the second bolt 36 are both arranged axially along the housing 1 to ensure that the housing 1 and the end cover 21 are tightly fitted with the sealing ring 32. The first bolt 34 and the second bolt 36 have independent engagement holes and screw holes, achieving precise alignment between the sealing seat 31 and the housing 1, and between the sealing seat 31 and the end cover 21, reducing assembly errors. The axially arranged bolts are compatible with sealing rings 32 of different thicknesses, and can adapt to diverse sealing requirements by adjusting the bolt length and screw depth.

[0032] In one possible implementation, the sealing ring 32 covers and seals the annular sealing surface 100, with a portion of the sealing ring 32 projected onto the vertical plane within the area of ​​the housing 1, and another portion of the sealing ring 32 projected onto the vertical plane within the area of ​​the end cover 21.

[0033] The sealing ring 32 can be a single ring, which is annular. The inner diameter of the sealing ring 32 is smaller than the diameter of the annular sealing surface 100, while the outer diameter of the sealing ring 32 is larger than the diameter of the annular sealing surface 100. This ensures that the projection of the sealing ring 32 in the vertical plane simultaneously covers the sealing surfaces 100 of both the housing 1 and the end cover 21, forming a continuous sealing interface and effectively blocking the leakage path of the medium.

[0034] In one possible implementation, such as Figure 2 As shown, a sealing cavity is formed between the sealing seat 31 and the sealing ring 32, which covers and seals the annular sealing surface 100. At least one first sealing ring is provided between the sealing seat 31 and the housing 1, and at least one second sealing ring is provided between the sealing seat 31 and the end cover 21. The diameter of the second sealing ring is smaller than that of the first sealing ring, and the second sealing ring is located inside the first sealing ring.

[0035] The first sealing ring (outer ring) and the second sealing ring (inner ring) form a stepped seal, which creates a pressure gradient through the diameter difference, further blocking the leakage path of the medium along the radial direction. The double-layer layout of the O-ring 32 can meet the requirements of high pressure differential conditions.

[0036] When the first sealing ring and the second sealing ring include at least two sealing rings 32, the sealing ring 32 with a smaller diameter will preferentially contact the high-pressure medium, and the sealing ring 32 with a larger diameter will serve as a secondary barrier to form a multi-layer seal. The layout of the multiple sealing rings 32 disperses stress and can avoid single-layer seal failure and extend the seal life.

[0037] A second aspect of this application provides a compressor, such as Figures 1-5 As shown, it includes a sealing mechanism as described in any of the first aspects; and a housing 1 and a movement 2, the movement 2 being located entirely inside the housing 1, the movement 2 including a stator 22 and end caps 21 disposed at both ends of the stator 22, the end caps 21 not protruding from the ends of the housing 1, the end caps 21 contacting the housing 1 to form an annular sealing surface 100, the sealing mechanism covering and sealing the annular sealing surface 100, and the sealing mechanism being detachably connected to the housing 1 and the end caps 21.

[0038] The mechanism 2 is completely integrated into the housing 1, with the end cover 21 not protruding, forming a compact axial structure that reduces external space occupation. Radial positioning is achieved through the annular sealing surface 100. The sealing mechanism employs a detachable connection design, allowing independent replacement of the sealing component 3 without disassembling the entire housing 1, significantly improving maintenance efficiency. The sealing mechanism can seal the annular sealing surface 100 at the junction of the housing 1 and the end cover 21, compensating for axial displacement and angular deflection, and adapting to thermal expansion or vibration conditions.

[0039] In one possible implementation, such as Figure 3 and Figure 4 As shown, the compressor includes a rotor 4, which is disposed inside the stator 22. The drive end of the stator 22 is used to connect with the coupling 5. The coupling 5 includes a first connecting section 51, an intermediate section 52, and a second connecting section 53 connected in sequence. The intermediate section 52 is detachably connected to the first connecting section 51 and the second connecting section 53. The intermediate section 52 can be disassembled to form a channel for the sealing assembly 3 to pass through.

[0040] The compressor provided in this embodiment allows for quick separation of the coupling 5 via a detachable intermediate section 52, forming a channel for the installation and replacement of the sealing assembly 3. This avoids the need for complete disassembly of the end cover 21 or rotor 4. The channel formed by the disassembly of the intermediate section 52 allows the sealing ring 32 and sealing seat 31 to pass through, reducing the space and time costs required for traditional axial disassembly and assembly. This is particularly suitable for space-constrained scenarios. The segmented connection of the coupling 5 ensures coaxiality during reassembly through precision mating surfaces after disassembly, reducing the risk of vibration due to maintenance.

[0041] The third aspect of this application, such as Figures 1-5 As shown, a method for replacing a sealing ring 32 is provided, applicable to a sealing mechanism of any of the first aspects, or applicable to a compressor of any of the first aspects. The steps of the method for replacing the sealing ring 32 include: S1. Loosen the bolt mechanism to disassemble the sealing seat 31 of the sealing assembly 3 and lift it, and disassemble the middle section 52 of the coupling 5; S2. After replacing the sealing ring 32 by passing it through the exposed channel of the disassembled intermediate section 52, reinstall the sealing seat 31 and the intermediate section 52; S3. The tightening bolt mechanism causes the sealing seat 31 to press the sealing ring 32 to form a seal on the sealing surfaces 100 of the housing 1 and the end cover 21.

[0042] The sealing ring 32 replacement method provided in this embodiment creates a channel for replacing the sealing ring 32 by disassembling the middle section 52 of the coupling 5. This eliminates the need for complete compressor disassembly. The coordinated operation of lifting the sealing seat 31 and disassembling the coupling 5 in sections ensures that the casing 1 and end cover 21 will not be damaged during sealing ring 32 replacement, meeting the anti-scratch requirements for industrial equipment sealing maintenance. Replacing the sealing ring 32 through partial disassembly, requiring only the removal of the middle section 52 of the coupling 5 and the sealing seat 31, significantly reduces operation time and lowers the risk of media leakage compared to traditional full disassembly methods.

[0043] The bolt mechanism can employ a step-by-step tightening process, first pre-tightening and then final tightening to ensure that the sealing ring 32 is evenly compressed, forming a twist-free annular sealing surface 100, thus guaranteeing a sealing effect.

[0044] Among them, such as Figure 5 As shown, a lifting ring 37 can be installed on the top of the sealing seat 31. When replacing the single-sided sealing ring 32, the sealing seat 31 is removed and moved axially to a certain distance between the housing 1 and the end cover 21, and then the sealing ring 32 is lifted and exposed. The sealing ring 32 is then replaced. After the axial movement is lifted, the sealing seat 31 can still maintain its horizontality, which is convenient for subsequent reinstallation.

[0045] The sealing seat 31 may have an annular groove for accommodating part of the sealing ring 32. The number and size of the annular groove are adapted to the sealing ring 32. The geometric constraints of the annular groove can ensure the pre-installation position accuracy of the sealing ring 32 in the axial and radial directions, avoiding uneven sealing contact caused by installation offset. The annular groove can effectively suppress the deformation of the sealing ring 32 caused by compressor vibration or pressure fluctuation. The interference fit between the annular groove and the sealing ring 32 can maintain a uniform contact pressure distribution and prevent sealing failure caused by local stress concentration. The annular groove design facilitates quick positioning and replacement of the sealing ring 32. Through the synergistic effect of mechanical limiting and interference fit, the assembly process is optimized while ensuring sealing reliability, making it suitable for industrial equipment with high-precision sealing requirements.

[0046] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which 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.

[0047] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

[0048] In view of the detailed description above, these and other changes can be made to these embodiments, and this written description includes embodiments of the best mode that disclose the invention. The patent scope of the invention is defined by the claims, which are not limited by this disclosure. The scope of protection of the invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the invention disclosed herein, based on the technical solutions and concepts of the invention, are within the scope of protection of the invention.

Claims

1. A sealing mechanism applied to a compressor, characterized in that, The compressor includes a housing (1) and a core (2) located entirely inside the housing (1). The core (2) includes a stator (22) and end caps (21) disposed at both ends of the stator (22). The end caps (21) contact the housing (1) to form an annular sealing surface (100). The sealing mechanism includes a sealing assembly (3) disposed at the ends of the housing (1) and the end caps (21). The sealing assembly (3) includes a sealing seat (31), an elastic sealing ring (32), and a bolt mechanism. The sealing ring (32) is provided between the sealing seat (31) and the housing (1) and between the sealing seat (31) and the end cap (21). The sealing seat (31) is detachably connected to the housing (1) and the end cap (21) through the bolt mechanism and applies pressure to the sealing ring (32) to achieve sealing.

2. The sealing mechanism according to claim 1, characterized in that, The end face of the housing (1) facing the drive end is flush with the end face of the end cover (21) facing the drive end. The sealing assembly (3) is disposed on the annular sealing surface (100) of the housing (1) and the end cover (21) facing the drive end. The annular sealing surface (100) is parallel to the outer wall of the housing (1). The sealing seat (31) is annular and perpendicular to the annular sealing surface (100).

3. The sealing mechanism according to claim 2, characterized in that, A portion of the sealing seat (31) is projected onto the vertical plane within the area of ​​the housing (1), and another portion of the sealing seat (31) is projected onto the vertical plane within the area of ​​the end cap (21).

4. The sealing mechanism according to any one of claims 1-3, characterized in that, The bolt mechanism includes a plurality of first bolts (34) spaced circumferentially on the outer side of the sealing seat (31) and a plurality of second bolts (36) spaced circumferentially on the inner side of the sealing seat (31). The sealing seat (31) is detachably connected to the housing (1) via the first bolts (34) and the sealing seat (31) is detachably connected to the end cap (21) via the second bolts (36).

5. The sealing mechanism according to claim 4, characterized in that, The sealing seat (31) has a plurality of first engagement holes (33) for the first bolt (34) to pass through, and the housing (1) has a plurality of first screw holes (11) corresponding to the first bolt (34), and the first bolt (34) is arranged along the axial direction of the housing (1). The sealing seat (31) has several second fitting holes (35) for the second bolt (36) to pass through, and the housing (1) has several second screw holes (211) corresponding to the second bolt (36). The second bolt (36) is arranged along the axial direction of the housing (1).

6. The sealing mechanism according to claim 1, characterized in that, The sealing ring (32) covers and seals the annular sealing surface (100), a portion of the sealing ring (32) is projected in the vertical plane within the range of the housing (1), and another portion of the sealing ring (32) is projected in the vertical plane within the range of the end cap (21).

7. The sealing mechanism according to claim 1, characterized in that, A sealing cavity is formed between the sealing seat (31) and the sealing ring (32) to cover and seal the annular sealing surface (100). At least one first sealing ring is provided between the sealing seat (31) and the housing (1). At least one second sealing ring is provided between the sealing seat (31) and the end cover (21). The diameter of the second sealing ring is smaller than the diameter of the first sealing ring. The second sealing ring is located inside the first sealing ring.

8. A compressor, characterized in that, include: The sealing mechanism as described in any one of claims 1-7; as well as, The housing (1) and the movement (2) are located entirely inside the housing (1). The movement (2) includes a stator (22) and end caps (21) disposed at both ends of the stator (22). The end caps (21) do not protrude from the end of the housing (1). The end caps (21) contact the housing (1) to form an annular sealing surface (100). The sealing mechanism covers and seals the annular sealing surface (100). The sealing mechanism is detachably connected to the housing (1) and the end caps (21).

9. The compressor according to claim 8, comprising a rotor (4) disposed inside the stator (22), the drive end of the stator (22) being used to connect to a coupling (5), the coupling (5) comprising a first connecting section (51), an intermediate section (52) and a second connecting section (53) connected in sequence, the intermediate section (52) being detachably connected to both the first connecting section (51) and the second connecting section (53), and the intermediate section (52) being detachable to form a channel for the sealing assembly (3) to pass through.

10. A method for replacing a sealing ring, characterized in that, When applied to a sealing mechanism as described in any one of claims 1-7, or to a compressor as described in claim 8 or 9, the method for replacing the sealing ring includes the following steps: The bolt loosening mechanism is used to disassemble the sealing seat of the sealing assembly and lift it, and to disassemble the middle section of the coupling; After replacing the sealing ring by passing it through the exposed channel of the disassembled intermediate section, the sealing seat and the intermediate section are reinstalled. The tightening bolt mechanism causes the sealing seat to press the sealing ring against the sealing surfaces of the housing and end cover to form a seal.

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