A sealing device for a compressor that conveys corrosive gases

Abstract

This utility model relates to the field of compressor technology and discloses a sealing device for a compressor conveying corrosive gases. It includes an inner floating ring seat, an outer floating ring seat connected to one side of the inner floating ring seat by screws, and a limiting seat fixed to one side of the outer floating ring seat by screws. An inner floating ring is installed on the inner side of the inner floating ring seat, and an outer floating ring is installed on the inner side of the outer floating ring seat. A spring is installed between the inner and outer floating ring seats. This utility model, by installing an inner floating ring on the inner side of the inner floating ring seat and an outer floating ring on the inner side of the outer floating ring seat, and forming a cavity between the inner and outer floating ring seats, the outer floating ring, the inner floating ring, and the rotating shaft, creates a sealing structure between the inner and outer floating rings and the rotating shaft. Sealing oil can be injected into the cavity through an oil injection nozzle. The sealing oil wets the junction of the inner and outer floating rings and the rotating shaft, forming an oil film, further improving the sealing performance between the sealing device and the rotating shaft, effectively preventing the leakage of corrosive gases.

Description

Technical Field

[0001] This utility model relates to the field of compressor technology, specifically a sealing device for a compressor that transports corrosive gases. Background Technology

[0002] In centrifugal compressors, the rotor and stator inevitably have gaps while rotating at high speed and remaining stationary, which can lead to gas leakage inside the machine, especially when conveying corrosive gases. To reduce or prevent such leakage, appropriate sealing devices must be installed.

[0003] Chinese patent discloses a sealing device for a twin-screw process gas compressor (authorization announcement number CN217652909U). This patented technology uses a multi-point flushing structure combined with a pumping ring to drive the high-viscosity flushing oil to flow fully and efficiently, effectively ensuring sealing performance and service life. However, its sealing effect is not good and it is easy to cause gas leakage. Utility Model Content

[0004] The purpose of this invention is to provide a sealing device for a compressor that transports corrosive gases, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A sealing device for a compressor conveying corrosive gases includes an inner floating ring seat, an outer floating ring seat connected to one side of the inner floating ring seat by screws, and a limiting seat fixed to one side of the outer floating ring seat by screws. An inner floating ring is installed on the inner side of the inner floating ring seat, and an outer floating ring is installed on the inner side of the outer floating ring seat. A spring is installed between the inner floating ring and the outer floating ring seat. The inner floating ring includes an inner floating ring body. A connecting pipe II is fixedly connected to one end of the inner floating ring body, and a connecting pipe I is fixedly connected to the other end of the inner floating ring body. A flange II is fixedly connected to one end of the connecting pipe II. A plurality of threaded holes I are formed in a ring on the inner side of the flange II. A sealing groove I is formed on the outer side of the inner floating ring body, and a sealing groove II is formed on the outer side of one end of the inner floating ring body near the connecting pipe II.

[0007] As a further embodiment of this utility model: the inner floating ring seat includes an inner floating ring seat body, one end of which is provided with a plurality of countersunk holes II in an annular shape, and a flange I is fixedly connected to the other end of the inner floating ring seat body. An oil injection nozzle is provided on the outer side of the inner floating ring seat body, and a plurality of countersunk holes I are provided on the inner side of the flange I in an annular shape.

[0008] As a further embodiment of this utility model: O-rings are embedded in the inner sides of both the first and second sealing grooves, the second countersunk hole corresponds one-to-one with the first threaded hole, the second flange is embedded in the inner floating ring seat body, and the second flange and the inner floating ring seat body are fixedly connected by screws passing through the inner sides of the second countersunk hole and the first threaded hole in sequence.

[0009] As a further embodiment of this utility model: the outer floating ring seat includes an outer floating ring seat body, one end of which is fixedly connected to a clamp, and the other end of which is fixedly connected to a flange. A sealing groove is provided on the outer side of the clamp, and a sealing groove is provided on the outer side of one end of the outer floating ring seat body near the clamp. A plurality of threaded holes are provided in a ring shape on the outer side of one end of the outer floating ring seat body near the sealing groove.

[0010] As a further embodiment of this utility model: the clamp is embedded and installed inside the inner floating ring seat body from one part of the flange; O-rings are also embedded and installed inside the sealing groove three and sealing groove four; the threaded hole two corresponds one-to-one with the countersunk hole one; the outer floating ring seat body and the flange one are fixedly connected by screws passing through the inner sides of the countersunk hole one and the threaded hole two in sequence.

[0011] As a further embodiment of this utility model: one end of the outer floating ring is fixedly connected to a flange four, and a sealing groove five is provided on the outer side of the outer floating ring, and an O-ring is also embedded in the inner side of the sealing groove five.

[0012] As a further embodiment of this utility model: a head plate is fixedly connected to one side of the limiting seat, a sealing groove six is ​​provided on one side of the head plate, the head plate and the flange four are both embedded and installed on one side of the outer floating ring seat, and an O-ring is also embedded and installed inside the sealing groove six. The head plate, the flange four, and the limiting seat flange three are all fixedly connected by screws.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] This invention features an inner float ring installed on the inner side of an inner float ring seat and an outer float ring installed on the inner side of an outer float ring seat. A cavity is formed between the inner float ring seat, outer float ring seat, outer float ring, inner float ring, and rotating shaft. A sealing structure is formed between the inner and outer float rings and the rotating shaft to prevent the leakage of corrosive gases. Sealing oil can be injected into the cavity through an oil injection nozzle. The sealing oil wets the junction of the inner and outer float rings and the rotating shaft, forming an oil film, which further improves the sealing performance between the sealing device and the rotating shaft, effectively preventing the leakage of corrosive gases. Furthermore, all structures are detachable, making it highly practical. Attached Figure Description

[0015] Figure 1This is a schematic diagram of a sealing device for a compressor that transports corrosive gases.

[0016] Figure 2 An exploded view of a sealing device for a compressor that transports corrosive gases;

[0017] Figure 3 This is a schematic diagram of the structure of the inner floating ring seat in a sealing device for a compressor that transports corrosive gases;

[0018] Figure 4 This is a schematic diagram of the structure of an inner floating ring in a sealing device for a compressor that transports corrosive gases;

[0019] Figure 5 This is a schematic diagram of the structure of an outer floating ring seat for a sealing device used in a compressor for conveying corrosive gases;

[0020] Figure 6 This is a cross-sectional schematic diagram of a sealing device and a rotating shaft for a compressor that transports corrosive gases.

[0021] In the diagram: 1. Inner floating ring seat; 11. Inner floating ring seat body; 12. Flange 1; 13. Countersunk hole 1; 14. Oil injection nozzle; 15. Countersunk hole 2; 2. Inner floating ring; 21. Inner floating ring body; 22. Connecting pipe 1; 23. Sealing groove 1; 24. Threaded hole 1; 25. Flange 2; 26. Connecting pipe 2; 27. Sealing groove 2; 3. Spring; 4. Outer floating ring seat; 41. Outer floating ring seat body; 42. Flange 3; 43. Threaded hole 2; 44. Clip; 45. Sealing groove 3; 46. Sealing groove 4; 5. Outer floating ring; 51. Flange 4; 52. Sealing groove 5; 6. Limiting seat; 61. End plate; 62. Sealing groove 6; 7. Rotating shaft. Detailed Implementation

[0022] Please see Figures 1-6 In this embodiment of the present invention, a sealing device for a compressor conveying corrosive gas includes an inner floating ring seat 1, an outer floating ring seat 4 connected to one side of the inner floating ring seat 1 by screws, and a limiting seat 6 fixed to one side of the outer floating ring seat 4 by screws. An inner floating ring 2 is installed on the inner side of the inner floating ring seat 1, and an outer floating ring 5 is installed on the inner side of the outer floating ring seat 4. A spring 3 is installed between the inner floating ring 2 and the outer floating ring seat 4. A rotating shaft 7 passes through the limiting seat 6, the inner floating ring 5 and the inner floating ring 2 in sequence, forming a cavity between the inner floating ring seat 1, the outer floating ring seat 4, the outer floating ring 5, the inner floating ring 2 and the rotating shaft 7. The inner floating ring 2 and the outer floating ring 5 can improve the sealing performance between the sealing device and the rotating shaft 7 and prevent the corrosive gas from leaking out. The spring 3 is located in the cavity and tightens the inner floating ring 2 and the outer floating ring seat 4.

[0023] exist Figure 2 , Figure 3 and Figure 6In the design, the inner floating ring seat 1 includes an inner floating ring seat body 11. One end of the inner floating ring seat body 11 has several countersunk holes 15 arranged in an annular shape, and a flange 12 is fixedly connected to the other end of the inner floating ring seat body 11. An oil injection nozzle 14 is provided on the outer side of the inner floating ring seat body 11, and several countersunk holes 13 are arranged in an annular shape on the inner side of the flange 12. Through the oil injection nozzle 14, sealing oil can be injected into the cavity formed between the inner floating ring seat 1, the outer floating ring seat 4, the outer floating ring 5, the inner floating ring 2 and the rotating shaft 7. The sealing oil wets the junction of the inner floating ring 2, the outer floating ring 5 and the rotating shaft 7, forming an oil film, which further improves the sealing performance between the sealing device and the rotating shaft 7 and effectively prevents the leakage of corrosive gases.

[0024] exist Figure 3 , Figure 4 and Figure 6 In the process, the inner floating ring 2 includes an inner floating ring body 21. A connecting pipe 26 is fixedly connected to one end of the inner floating ring body 21, and a connecting pipe 22 is fixedly connected to the other end of the inner floating ring body 21. A flange 25 is fixedly connected to one end of the connecting pipe 26. Several threaded holes 24 are annularly formed on the inner side of the flange 25. A sealing groove 23 is formed on the outer side of the inner floating ring body 21, and a sealing groove 27 is formed on one end of the inner floating ring body 21 near the outer side of the connecting pipe 26, for sealing. O-rings are embedded in the inner sides of both groove 1 23 and sealing groove 2 27. The O-rings can improve the sealing effect at the junction of inner float ring seat 1 and inner float ring 2. Countersunk hole 2 15 corresponds one-to-one with threaded hole 1 24. Flange 2 25 is embedded in the inner float ring seat body 11. Flange 2 25 and inner float ring seat body 11 are fixedly connected by screws passing through the inner sides of countersunk hole 2 15 and threaded hole 24 in sequence, so that inner float ring seat 1 and inner float ring 2 can be reliably installed together.

[0025] exist Figure 4 , Figure 5 and Figure 6 In the middle, the outer floating ring seat 4 includes an outer floating ring seat body 41. One end of the outer floating ring seat body 41 is fixedly connected to a clamp 44, and the other end of the outer floating ring seat body 41 is fixedly connected to a flange 42. A sealing groove 45 is opened on the outer side of the clamp 44. A sealing groove 46 is opened on the outer side of the outer floating ring seat body 41 near the clamp 44. Several threaded holes 43 are opened in a ring on the outer side of the outer floating ring seat body 41 near the sealing groove 46. The clamp 44 is embedded and installed on the inner side of the inner floating ring seat body 11 from the flange 12. O-rings are also embedded and installed on the inner side of the sealing groove 45 and the sealing groove 46. The O-rings can improve the sealing effect at the junction of the inner floating ring seat 1 and the outer floating ring seat 4. The threaded holes 43 correspond one-to-one with the countersunk holes 13. The outer floating ring seat body 41 and the flange 12 are fixedly connected by screws passing through the inner side of the countersunk holes 13 and the threaded holes 43 in sequence.

[0026] exist Figure 2 , Figure 5 and Figure 6 In the middle, one end of the outer floating ring 5 is fixedly connected to the flange 4 51, and a sealing groove 52 is provided on the outer side of the outer floating ring 5. An O-ring is also embedded in the inner side of the sealing groove 52. The sealing effect at the junction of the outer floating ring seat 4 and the outer floating ring 5 can be improved by the O-ring.

[0027] exist Figure 2 , Figure 5 and Figure 6 In the middle, a head plate 61 is fixedly connected to one side of the limiting seat 6. A sealing groove 62 is opened on one side of the head plate 61. The head plate 61 and the flange 41 are both embedded in one side of the outer floating ring seat 4. An O-ring is also embedded in the inner side of the sealing groove 62. The O-ring can improve the sealing effect at the junction of the outer floating ring 5 and the limiting seat 6. The head plate 61, the flange 41, and the flange 32 of the limiting seat 6 are all fixedly connected by screws, so that the outer floating ring seat 4, the outer floating ring 5, and the limiting seat 6 are fixedly connected into a whole.

[0028] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A sealing device for a compressor for delivering a corrosive gas, comprising an inner floating ring seat (1), an outer floating ring seat (4) connected by means of screws on one side of the inner floating ring seat (1), and a limiting seat (6) fixed by means of screws on one side of the outer floating ring seat (4), characterized in that, An inner float ring (2) is installed on the inner side of the inner float ring seat (1), and an outer float ring (5) is installed on the inner side of the outer float ring seat (4). A spring (3) is installed between the inner float ring (2) and the outer float ring seat (4). The inner float ring (2) includes an inner float ring body (21). One end of the inner float ring body (21) is fixedly connected to a connecting pipe (26), and the other end of the inner float ring body (21) is fixedly connected to a connecting pipe (22). One end of the connecting pipe (26) is fixedly connected to a flange (25). The inner side of the flange (25) is provided with several threaded holes (24) in an annular shape. The outer side of the inner float ring body (21) is provided with a sealing groove (23), and the outer side of the inner float ring body (21) near the connecting pipe (26) is provided with a sealing groove (27).

2. A seal assembly for a compressor for delivering a corrosive gas as set forth in claim 1 wherein, The inner float seat (1) includes an inner float seat body (11). One end of the inner float seat body (11) is provided with a plurality of countersunk holes (15) in an annular shape, and a flange (12) is fixedly connected to the other end of the inner float seat body (11). An oil injection nozzle (14) is provided on the outer side of the inner float seat body (11), and a plurality of countersunk holes (13) are provided on the inner side of the flange (12) in an annular shape.

3. A seal assembly for a compressor for conveying a corrosive gas as set forth in claim 2 wherein, O-rings are embedded in the inner sides of both the first sealing groove (23) and the second sealing groove (27). The second countersunk hole (15) corresponds to the first threaded hole (24). The second flange (25) is embedded in the inner floating ring seat body (11). The second flange (25) and the inner floating ring seat body (11) are fixedly connected by screws through the inner sides of the second countersunk hole (15) and the first threaded hole (24) in sequence.

4. A seal assembly for a compressor for delivering a corrosive gas as set forth in claim 1 wherein, The outer floating ring seat (4) includes an outer floating ring seat body (41). One end of the outer floating ring seat body (41) is fixedly connected to a clamp (44), and the other end of the outer floating ring seat body (41) is fixedly connected to a flange (42). A sealing groove (45) is provided on the outer side of the clamp (44). A sealing groove (46) is provided on the outer side of one end of the outer floating ring seat body (41) near the clamp (44). A plurality of threaded holes (43) are provided in a ring shape on the outer side of one end of the outer floating ring seat body (41) near the sealing groove (46).

5. A sealing device for a compressor conveying corrosive gases according to claim 4, characterized in that, The clip (44) is embedded in the inner side of the inner float ring seat body (11) from the flange one (12). O-rings are also embedded in the inner sides of the sealing groove three (45) and the sealing groove four (46). The threaded hole two (43) corresponds one-to-one with the countersunk hole one (13). The outer float ring seat body (41) and the flange one (12) are fixedly connected by screws through the inner sides of the countersunk hole one (13) and the threaded hole two (43) in sequence.

6. A sealing device for a compressor conveying corrosive gases according to claim 1, characterized in that, One end of the outer floating ring (5) is fixedly connected to a flange four (51), and a sealing groove five (52) is provided on the outer side of the outer floating ring (5), and an O-ring is also embedded in the inner side of the sealing groove five (52).

7. A sealing device for a compressor conveying corrosive gases according to claim 1, characterized in that, A head plate (61) is fixedly connected to one side of the limiting seat (6). A sealing groove (62) is provided on one side of the head plate (61). The head plate (61) and the flange (51) are both embedded in one side of the outer floating ring seat (4). An O-ring is also embedded in the inner side of the sealing groove (62). The head plate (61), the flange (51), and the flange (42) of the limiting seat (6) are all fixedly connected by screws.

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