Centrifugal recycle gas compressor barrel seal and anti-aging assembly therefor

Abstract

The application provides a centrifugal circulating gas compressor cylinder seal and an anti-aging assembly thereof, and relates to the field of circulating gas compressors.The centrifugal circulating gas compressor cylinder seal comprises a first cylinder and a second cylinder, the outer surfaces of the first cylinder and the second cylinder are respectively fixedly connected with a first fixed ring and a second fixed ring, the right surface of the first fixed ring is provided with an annular sealing groove, the inner wall of the annular sealing groove is provided with a buffer cavity, and the buffer cavity is internally provided with a buffer pressure relief pad.The application exerts uniform reaction force on the sealing rubber ring through the elastic deformation of the buffer pressure relief pad, so that the sealing rubber ring is tightly attached to the inner wall of the annular sealing groove.Compared with the conventional rigid sealing structure, the flexible contact mode can compensate for the micro-deformation of the sealing surface caused by temperature changes and pressure fluctuations, and significantly improves the sealing reliability between the first cylinder and the second cylinder under the working conditions of circulating gas medium, high-low temperature alternation and pressure fluctuation.

Description

Technical Field

[0001] This utility model relates to the field of circulating gas compressors, and more specifically, to the cylinder seal of a centrifugal circulating gas compressor and its anti-aging components. Background Technology

[0002] Centrifugal circulating gas compressors are core equipment in process industries such as chemical and oil refining. They are mainly used to transport and circulate various process gases and increase their pressure. Their working principle is to use a high-speed rotating impeller to do work on the gas. The gas gains kinetic energy under the action of centrifugal force, and then the diffuser converts the kinetic energy into pressure energy to achieve pressurization. These compressors have the advantages of large gas handling capacity, stable operation, and gas that is not contaminated by oil.

[0003] In high-pressure or flammable and explosive environments, the compressor body often adopts a vertically split cylinder, also known as a cylindrical cylinder body. This structure is like a sealed cylinder, with both ends sealed by end caps. Compared with the horizontally split structure, the cylindrical cylinder body has higher strength and rigidity, and has a smaller leakage surface and excellent airtightness, which can effectively prevent the leakage of high-pressure dangerous gases. At the same time, its shaft end usually adopts a high-performance sealing system such as a dry gas seal, further ensuring the long-term safe and stable operation of the entire compressor unit.

[0004] Existing centrifugal circulating gas compressor cylinders use conventional rubber sealing rings, which have poor resistance to high and low temperatures, media corrosion, and aging. When used for extended periods under conditions of circulating gas, alternating high and low temperatures, and pressure fluctuations, they are prone to hardening, cracking, swelling, and wear aging. The sealing structure lacks protection and auxiliary corrosion inhibition measures, leading to rapid aging of the rubber rings. Seal failure results in circulating gas leakage, causing decreased compressor efficiency, increased energy consumption, and safety hazards. Frequent replacement of sealing rings leads to frequent equipment downtime for maintenance, increasing operating costs and production losses. Therefore, we propose a centrifugal circulating gas compressor cylinder seal and its anti-aging components. Utility Model Content

[0005] The purpose of this invention is to solve the problem that the current sealing structure lacks protection and auxiliary corrosion inhibition measures, resulting in rapid aging of the rubber ring.

[0006] To achieve the above-mentioned objectives and improve the aforementioned problems, this utility model provides a centrifugal circulating gas compressor cylinder seal and its anti-aging component, comprising a first cylinder and a second cylinder. A first fixing ring and a second fixing ring are respectively fixedly connected to the outer surfaces of the first cylinder and the second cylinder. An annular sealing groove is formed on the right side surface of the first fixing ring, and a buffer cavity is formed on the inner wall of the annular sealing groove. A buffer pressure reducing pad is provided inside the buffer cavity. A sealing rubber ring that fits into the buffer cavity is provided on the left side surface of the second fixing ring. A connecting flange is fixedly fitted on the outer surface of both the first fixing ring and the second fixing ring. A fixing bolt is provided on the connecting flange, and the two connecting flanges are fixedly connected by the fixing bolt. A sealing component is provided on the first fixing ring.

[0007] As a preferred technical solution of this application, the sealing assembly includes an interface, which is fixedly connected to the left side surface of the first fixing ring, and a sealing protective shell is fitted onto the outer surfaces of the first cylinder and the second cylinder.

[0008] As a preferred technical solution of this application, the sealing protective shell is composed of a first half-shell and a second half-shell, and a fixing pin is provided on the lower surface of the first half-shell.

[0009] As a preferred technical solution of this application, the second half-shell is rotatably connected to the fixing pin, and a second sealing groove is provided on the outer surface of the connecting flange.

[0010] As a preferred technical solution of this application, the inner walls of the first half-shell and the second half-shell are both fixedly connected with a second sealing ring, and the cross-sections of the first half-shell and the second half-shell are set as U-shaped.

[0011] As a preferred technical solution of this application, a third sealing ring is fixed to the inner wall of the first half-shell and the second half-shell, and the third sealing ring is in contact with the outer surface of the first cylinder and the second cylinder.

[0012] As a preferred technical solution of this application, the second half-shell is provided with a leakage detection sensor, and the left side surface of the first half-shell is also provided with an interface.

[0013] As a preferred technical solution of this application, the two interfaces are connected by a flexible hose, and the first half-shell and the second half-shell are also fixedly connected by fixing bolts.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows: In the scheme of this application: 1. Through the cooperation between structures such as the annular sealing groove, buffer cavity, buffer pressure reducing pad, sealing ring, connecting flange and fixing bolt, the sealing ring is embedded in the annular sealing groove and forms flexible contact with the buffer pressure reducing pad in the buffer cavity. The elastic deformation of the buffer pressure reducing pad applies a uniform reaction force to the sealing ring, so that the sealing ring is tightly attached to the inner wall of the annular sealing groove. Compared with the conventional rigid sealing structure, the flexible contact method can compensate for the micro deformation of the sealing surface caused by temperature changes and pressure fluctuations, and significantly improve the sealing reliability between the first cylinder and the second cylinder under the conditions of circulating gas medium, high and low temperature alternation and pressure fluctuation. 2. Through the cooperation of the interface, sealing shell, first half shell, second half shell, second sealing groove, second sealing ring, third sealing ring, and leakage detection sensor, the sealing shell is fitted onto the outer surface of the cylinder and cooperates with the second and third sealing rings to form a closed protective space, achieving secondary sealing protection at the joint. External equipment injects inert gas into the annular sealing groove through the interface to form a slightly positive pressure protective atmosphere, effectively slowing down the aging rate of the sealing ring. At the same time, the leakage detection sensor monitors the gas changes in the protective space in real time, and can detect and alarm in time when leakage occurs due to sealing ring failure, extending the service life of the sealing ring and reducing the frequency of equipment downtime for maintenance. Attached Figure Description

[0015] Figure 1 A schematic diagram of the structure of the centrifugal circulating gas compressor cylinder seal and its anti-aging components provided in this application; Figure 2 A schematic diagram of the internal structure of the cylinder in the centrifugal circulating gas compressor cylinder seal and its anti-aging component provided in this application; Figure 3 A schematic diagram of the structure of the second sealing groove in the centrifugal circulating gas compressor cylinder seal and its anti-aging component provided in this application; Figure 4 This is a schematic diagram of the structure of the annular sealing ring in the centrifugal circulating gas compressor cylinder seal and its anti-aging component provided in this application.

[0016] The image shows: 1. First cylinder; 2. Second cylinder; 3. First fixing ring; 4. Second fixing ring; 5. Annular sealing groove; 6. Buffer chamber; 7. Buffer pressure reducing pad; 8. Sealing ring; 9. Connecting flange; 10. Fixing bolt; 11. Interface; 12. Sealing protective shell; 13. First half shell; 14. Second half shell; 15. Fixing pin; 16. Second sealing groove; 17. Second sealing ring; 18. Third sealing ring; 19. Leakage detection sensor. Detailed Implementation

[0017] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0018] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0019] It should be noted that, unless otherwise specified, the embodiments and features and technical solutions in the present invention can be combined with each other.

[0020] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0021] Example 1 Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 The centrifugal circulating gas compressor cylinder seal and its anti-aging components include a first cylinder 1 and a second cylinder 2. The outer surfaces of the first cylinder 1 and the second cylinder 2 are respectively fixedly connected to a first fixing ring 3 and a second fixing ring 4. The right side surface of the first fixing ring 3 is provided with an annular sealing groove 5. The inner wall of the annular sealing groove 5 is provided with a buffer cavity 6 for component installation. The buffer cavity 6 is provided with a buffer pressure reducing pad 7. The left side surface of the second fixing ring 4 is provided with a sealing ring 8 that fits into the buffer cavity 6 for sealing. The outer surfaces of the first fixing ring 3 and the second fixing ring 4 are both fixedly fitted with connecting flanges 9. The connecting flanges 9 are provided with fixing bolts 10 for fixing. The two connecting flanges 9 are fixedly connected by fixing bolts 10. The first fixing ring 3 is provided with a sealing component.

[0022] During connection, the second cylinder 2 is aligned with the first cylinder 1, and the sealing ring 8 is pressed into the annular sealing groove 5. After the sealing ring 8 is pressed in, it forms a flexible contact with the buffer pressure reducing pad 7 to increase the sealing effect. The sealing ring 8 is prepared by adding high-temperature resistant fillers, anti-corrosion additives, anti-aging stabilizers, and wear-resistant reinforcing agents to the base rubber substrate, and by mixing and molding processes. This optimizes the hardness, elasticity, temperature resistance, media resistance, and anti-aging performance of the ring, making it suitable for the working environment of the circulating gas compressor.

[0023] Example 2 The centrifugal circulating gas compressor cylinder seal and its anti-aging components provided in Example 1 are further optimized, specifically, as follows: Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, the sealing assembly includes an interface 11, which is fixedly connected to the left side surface of the first fixing ring 3. A sealing protective shell 12 is fitted on the outer surface of the first cylinder 1 and the second cylinder 2. The sealing protective shell 12 is composed of a first half shell 13 and a second half shell 14. A fixing pin 15 is provided on the lower surface of the first half shell 13. The second half shell 14 is rotatably connected to the fixing pin 15. A second sealing groove 16 is opened on the outer surface of the connecting flange 9. A second sealing ring 17 is fixedly connected to the inner wall of the first half shell 13 and the second half shell 14. The cross-section of the first half shell 13 and the second half shell 14 is set as U-shaped. A third sealing ring 18 is fixed on the inner wall of the first half shell 13 and the second half shell 14. The third sealing ring 18 is in contact with the outer surface of the first cylinder 1 and the second cylinder 2. A leak detection sensor 19 for leaking gas detection is provided on the second half shell 14. An interface 11 is also provided on the left side surface of the first half shell 13. The two interfaces 11 are connected by a hose. The first half shell 13 and the second half shell 14 are also fixedly connected by fixing bolts 10.

[0024] After the first cylinder 1 and the second cylinder 2 are connected by fixing bolts 10 and connecting flange 9, the interface 11 on the first fixing ring 3 can be connected to the interface 11 on the first half shell 13 through a hose. Then, the first half shell 13 and the second half shell 14 are closed to form a complete seal. This not only protects the fixing bolts 10, but also provides a secondary seal at the joint of the cylinder. Furthermore, by using external equipment in conjunction with interface 11 and hose, inert gas is injected into the annular sealing groove 5 to achieve a slight positive pressure. This not only further improves the sealing effect, but also slows down the aging of the sealing ring 8. In the event of a leak, the gas cannot directly overflow from the closed space formed by the first half shell 13 and the second half shell 14. At this time, the leak can be detected by the leak detection sensor 19.

[0025] The leak detection sensor 19 can be freely selected according to the type of gas inside the cylinder.

[0026] The usage process of the centrifugal circulating gas compressor cylinder seal and its anti-aging component provided by this utility model is as follows: First, during the cylinder docking stage, the operator aligns the second cylinder 2 with the first cylinder 1, so that the second fixing ring 4 is opposite to the first fixing ring 3. At this time, the sealing ring 8 fixedly connected to the left side of the second fixing ring 4 is aligned with the annular sealing groove 5 opened on the right side of the first fixing ring 3. The second cylinder 2 is pressed into the first cylinder 1, and the sealing ring 8 is embedded into the annular sealing groove 5 and enters the buffer cavity 6, forming a flexible contact with the buffer pressure relief pad 7 set inside the buffer cavity 6. The buffer pressure relief pad 7 undergoes elastic deformation under the pressure of the sealing ring 8, applying a reaction force to the sealing ring 8, so that the sealing ring 8 is tightly fitted to the inner wall of the annular sealing groove 5, achieving the initial seal between the first cylinder 1 and the second cylinder 2.

[0027] At the same time, the connecting flanges 9 fixedly fitted on the outer surfaces of the first fixing ring 3 and the second fixing ring 4 fit together. The operator locks the two connecting flanges 9 with the fixing bolts 10 to complete the mechanical fastening connection between the first cylinder 1 and the second cylinder 2. The fixing bolts 10 are evenly distributed along the circumference of the connecting flanges 9 to ensure that the clamping force of each part of the connecting flanges 9 is uniform.

[0028] Then, the auxiliary sealing and protection stage begins. The operator connects the interface 11 fixed to the left side of the first fixing ring 3 with the interface 11 similarly provided on the left side of the first half-shell 13 via a hose. External equipment injects inert gas into the annular sealing groove 5 through the hose, creating a slightly positive pressure environment inside the annular sealing groove 5 and the buffer chamber 6. This slightly positive pressure further pushes the sealing ring 8 to fit tightly against the inner wall of the annular sealing groove 5, improving the sealing effect. On the other hand, it creates an inert gas protective atmosphere around the sealing ring 8, slowing down the aging rate of the sealing ring 8 due to contact with the active ingredients in the circulating gas medium.

[0029] The operator then closes the first half-shell 13 and the second half-shell 14. Since the lower surface of the first half-shell 13 has a fixing pin 15, the second half-shell 14 is rotatably connected to the fixing pin 15. The second half-shell 14 rotates around the fixing pin 15 until it aligns with the first half-shell 13, forming a complete sealing protective shell 12. The sealing protective shell 12 is fitted onto the outer surfaces of the first cylinder 1 and the second cylinder 2, completely enclosing the connecting flange 9 and the fixing bolts 10 inside. During the closing process, the second sealing ring 17, fixedly connected to the inner walls of the first half-shell 13 and the second half-shell 14, is embedded in the second sealing groove 16 opened on the outer surface of the connecting flange 9, achieving a seal between the sealing protective shell 12 and the connecting flange 9. Simultaneously, the third sealing ring 18, fixedly attached to the inner walls of the first half-shell 13 and the second half-shell 14, is in close contact with the outer surfaces of the first cylinder 1 and the second cylinder 2, achieving a seal between the sealing protective shell 12 and the outer surface of the cylinder.

[0030] After the sealed protective shell 12 is closed, the first half shell 13, the second half shell 14, and the second sealing ring 17 and the third sealing ring 18 inside it together form a closed protective space. This space completely isolates the joint between the first cylinder 1 and the second cylinder 2, the connecting flange 9 and the fixing bolts 10 from the external environment, thus achieving secondary sealing protection.

[0031] During operation, if the sealing ring 8 between the first cylinder 1 and the second cylinder 2 fails to seal, the circulating gas will first leak into the closed space formed inside the sealing protective shell 12. Since the sealing protective shell 12 maintains a good external seal through the second sealing ring 17 and the third sealing ring 18, the leaked gas cannot directly escape to the external atmosphere, but accumulates inside the sealing protective shell 12. The leak detection sensor 19 installed on the second half shell 14 monitors the gas composition or pressure changes in the closed space in real time. When a circulating gas leak is detected, the leak detection sensor 19 issues an alarm signal to prompt the operator to handle it in time.

[0032] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0033] Obviously, the embodiments described above are only some embodiments of this utility model, not all embodiments. The accompanying drawings show preferred embodiments of this utility model, but do not limit the patent scope of this utility model. This utility model can be implemented in many different forms; rather, the purpose of providing these embodiments is to provide a more thorough and comprehensive understanding of the disclosure of this utility model. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing specific embodiments, or make equivalent substitutions for some of the technical features. Any equivalent structures made using the content of this utility model specification and drawings, directly or indirectly applied to other related technical fields, are similarly within the patent protection scope of this utility model.

Claims

1. A centrifugal circulating gas compressor cylinder seal and its anti-aging components, characterized in that, The device includes a first cylinder (1) and a second cylinder (2). The outer surfaces of the first cylinder (1) and the second cylinder (2) are respectively fixedly connected with a first fixing ring (3) and a second fixing ring (4). The right side surface of the first fixing ring (3) is provided with an annular sealing groove (5). The inner wall of the annular sealing groove (5) is provided with a buffer cavity (6). The buffer cavity (6) is provided with a buffer pressure reducing pad (7). The left side surface of the second fixing ring (4) is provided with a sealing rubber ring (8) that fits into the buffer cavity (6). The outer surfaces of the first fixing ring (3) and the second fixing ring (4) are both fixedly fitted with connecting flanges (9). The connecting flanges (9) are provided with fixing bolts (10). The two connecting flanges (9) are fixedly connected by fixing bolts (10). The first fixing ring (3) is provided with a sealing assembly. The sealing assembly includes an interface (11), which is fixedly connected to the left side surface of the first fixing ring (3). The outer surfaces of the first cylinder (1) and the second cylinder (2) are fitted with a sealing protective shell (12). The sealing protective shell (12) is composed of a first half shell (13) and a second half shell (14). The lower surface of the first half shell (13) is provided with a fixing pin (15).

2. The centrifugal circulating gas compressor cylinder seal and its anti-aging component according to claim 1, characterized in that, The second half shell (14) is rotatably connected to the fixing pin (15), and the outer surface of the connecting flange (9) is provided with a second sealing groove (16).

3. The centrifugal circulating gas compressor cylinder seal and its anti-aging component according to claim 2, characterized in that, The inner walls of the first half shell (13) and the second half shell (14) are both fixedly connected with a second sealing ring (17), and the cross-sections of the first half shell (13) and the second half shell (14) are set to U-shape.

4. The centrifugal circulating gas compressor cylinder seal and its anti-aging component according to claim 3, characterized in that, The inner walls of the first half shell (13) and the second half shell (14) are fixed with a third sealing ring (18), which is in contact with the outer surfaces of the first cylinder (1) and the second cylinder (2).

5. The centrifugal circulating gas compressor cylinder seal and its anti-aging component according to claim 4, characterized in that, The second half-shell (14) is provided with a leakage detection sensor (19), and the left side surface of the first half-shell (13) is also provided with an interface (11).

6. The centrifugal circulating gas compressor cylinder seal and its anti-aging component according to claim 5, characterized in that, The two interfaces (11) are connected by a hose, and the first half-shell (13) and the second half-shell (14) are also fixedly connected by a fixing bolt (10).

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