A carbon ring seal for use in a process compressor

Abstract

The utility model relates to compressor sealing technical field provides a carbon ring seal for process compressor, including the casing, the inside of casing is equipped with the central hole of accommodating vane shaft rod insertion, the air inlet channel that is communicated with the central hole is seted up on the casing, the annular accommodating groove that is coaxial with the central hole is seted up in the casing, the floating carbon ring of setting up in the accommodating groove is equipped with the outer wall of vane shaft, the exhaust passage is seted up on the casing, the sealed gas path is formed through the floating carbon ring between the air inlet channel and exhaust passage, so that the air inlet is discharged from the exhaust passage after floating carbon ring. The utility model overcomes the insufficient of prior art, and the design is reasonable, and the structure is compact, and the rubber ring is snared in the outer wall of floating carbon ring, provides the elastic support, and the pressure change and vibration influence are buffered, and the clearance between floating carbon ring and vane shaft is stabilized, guarantees the sealing effect, prolongs the life.

Description

Technical Field

[0001] This utility model relates to the field of compressor sealing technology, specifically to a carbon ring seal applied to a process compressor. Background Technology

[0002] A process compressor is a specialized mechanical device used to compress specific process gases. Widely used in industries such as petrochemicals, pharmaceuticals, and energy, it features high pressure, high purity, or corrosion resistance. Unlike ordinary air compressors, it is designed for special gases in the chemical and petrochemical industries (such as hydrogen, chlorine, and propane), requiring high pressure, oil-free operation, or corrosion resistance.

[0003] Carbon ring seals, as a widely used sealing technology, play an important role in many rotating equipment fields such as fans and process compressors. They belong to the category of flow resistance seals. Their core sealing principle is to effectively limit leakage by utilizing the resistance effect generated by the fluid in the sealing gap. However, due to the unique sealing principle and specific structural characteristics of carbon ring seals, wear with the shaft or bushing is inevitable during actual use, leading to a reduction in their service life. Therefore, we propose a carbon ring seal for use in process compressors. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] In view of the shortcomings of the prior art, this utility model provides a carbon ring seal for use in process compressors to solve the above-mentioned problems in the prior art.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, this utility model provides the following technical solution: a carbon ring seal for a process compressor, comprising a housing, wherein the housing has a central hole for accommodating an impeller shaft insertion, an air intake channel communicating with the central hole is provided on the housing, an annular receiving groove coaxial with the central hole is provided inside the housing, a floating carbon ring is provided in the receiving groove and sleeved on the outer wall of the impeller shaft, and an exhaust channel is provided on the housing, wherein the air intake channel and the exhaust channel are connected by the floating carbon ring to form a sealed air passage, so that the intake air passes through the floating carbon ring and is discharged from the exhaust channel;

[0008] A rubber ring is provided inside the receiving groove. The rubber ring is sleeved on the outer wall of the floating carbon ring. A gap is left between the rubber ring and the inner wall of the receiving groove to allow for its deformation, so as to stabilize the gap between the floating carbon ring and the impeller shaft.

[0009] Furthermore, the floating carbon rings are arranged in three sets. The intake channel is located between the two floating carbon rings away from the impeller, and the exhaust channel is located between the two floating carbon rings close to the impeller.

[0010] Furthermore, the width of the floating carbon ring closer to the impeller side is greater than the width of the two floating carbon rings farther from the impeller side.

[0011] Furthermore, the exhaust passage has a T-shaped cross-section that is wider inside and narrower outside, and the housing is provided with a pressure relief component that communicates with the wider part inside the exhaust passage.

[0012] Furthermore, a T-shaped exhaust pipe coaxial with the exhaust channel is provided inside the exhaust channel, and an exhaust hole is opened inside the exhaust pipe along its length direction. A spring is provided between the T-shaped exhaust pipe and the exhaust channel, and the width of the exhaust pipe abuts against one end of the pressure relief assembly.

[0013] Furthermore, the pressure relief assembly includes a first pressure relief channel and a second pressure relief channel, which are offset at one end near the exhaust pipe.

[0014] (III) Beneficial Effects

[0015] This utility model embodiment provides a carbon ring seal for use in process compressors. It has the following beneficial effects:

[0016] 1. The rubber ring is fitted around the outer wall of the floating carbon ring, providing elastic support, buffering pressure changes and vibration effects, stabilizing the gap between the floating carbon ring and the impeller shaft, ensuring sealing effect, and extending service life.

[0017] 2. Three sets of floating carbon rings are set up, and the intake and exhaust channels are cleverly positioned to form a multi-level sealing barrier for the sealing gas, effectively preventing external media leakage and enhancing the overall sealing performance. The floating carbon rings near the impeller are widened to better withstand the harsh working conditions brought by dynamic pressure, ensuring the stability and reliability of the sealing structure.

[0018] 3. When the air pressure exceeds a certain value, the exhaust pipe squeezes the spring to trigger pressure relief, ensuring the safe operation of the entire sealing system. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This utility model Figure 1 Enlarged schematic diagram of structure A in the middle.

[0021] In the diagram: 1. Housing; 2. Intake passage; 3. Receiving groove; 4. Floating carbon ring; 5. Rubber ring; 6. Exhaust passage; 7. Exhaust pipe; 8. Exhaust port; 9. Spring; 10. First pressure relief passage; 11. Second pressure relief passage. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0023] See attached document Figure 1-2 A carbon ring seal for a process compressor includes a housing 1. The housing 1 has a cylindrical central hole for accommodating an impeller shaft insertion. A radial air intake channel 2 communicating with the central hole is provided on the housing 1 to introduce sealing gas, providing a gas source for the subsequent formation of a sealing gas path. An annular receiving groove 3 coaxial with the central hole is provided inside the housing 1. A floating carbon ring 4 is fitted onto the outer wall of the impeller shaft within the receiving groove 3. The floating carbon ring 4 maintains a dynamic gap of 0.1-0.3 mm with the outer diameter of the impeller shaft to facilitate effective sealing. An exhaust channel 6 is provided on the housing 1. The air intake channel 2 and the exhaust channel 6 form a sealed gas path through the floating carbon ring 4. When air enters through the air intake channel 2, it passes through the gap between the floating carbon ring 4 and the impeller shaft and is then discharged through the exhaust channel 6. During this process, the sealing gas forms a certain pressure at the floating carbon ring 4, preventing leakage of external media such as lubricating oil or other gases, thus achieving a reliable sealing effect.

[0024] A rubber ring 5 is provided inside the receiving groove 3. The rubber ring 5 is sleeved on the outer wall of the floating carbon ring 4. A gap is left between the rubber ring 5 and the inner wall of the receiving groove 3 to allow for its deformation and to form an elastic support for it, so as to stabilize the gap between the floating carbon ring 4 and the impeller shaft. When the floating carbon ring 4 is subjected to pressure changes or slight vibrations of the impeller shaft during operation, the rubber ring 5 can buffer these effects through its own elastic deformation, stabilize the gap between the floating carbon ring 4 and the impeller shaft, ensure the sealing effect between the floating carbon ring 4 and the impeller shaft, and avoid problems such as seal failure or accelerated wear due to excessive or insufficient gap, effectively extending the service life of the sealing structure.

[0025] In this embodiment, three sets of floating carbon rings 4 are provided to further improve the sealing effect. The intake channel 2 is located between the two floating carbon rings 4 that are far away from the impeller, and the exhaust channel 6 is located between the two floating carbon rings 4 that are close to the impeller. When the sealing gas passes through the floating carbon rings 4, it can form a multi-level sealing barrier, thereby enhancing the overall sealing performance.

[0026] In this embodiment, the width of the floating carbon ring 4 near the impeller side is greater than the width of the two floating carbon rings 4 far from the impeller side. When the impeller rotates, it will generate dynamic pressure, which makes the floating carbon ring 4 near the impeller side bear greater temperature, pressure, vibration and impact. Widening it makes it better able to withstand harsh working environment and ensure the stability and reliability of the sealing structure.

[0027] To ensure the distance between the widened floating carbon ring 4 and the impeller shaft and to reduce the temperature of the impeller, sealing gas is introduced into the impeller side housing 1, so that a stable gas pressure environment is formed between the widened floating carbon ring 4 and the impeller shaft, further improving the stability and reliability of the sealing structure.

[0028] In this embodiment, the exhaust channel 6 has a T-shaped structure with a wider inner section and a narrower outer section. The housing 1 is provided with a pressure relief component that communicates with the wider part of the exhaust channel 6. When the gas pressure in the exhaust channel 6 exceeds a certain value, the pressure relief component can release some gas in time to ensure the safe operation of the entire sealing system.

[0029] In this embodiment, a T-shaped exhaust pipe 7 coaxial with the exhaust channel 6 is provided inside the exhaust channel 6. An exhaust hole 8 is opened inside the exhaust pipe 7 along its length direction. A spring 9 is provided between the T-shaped exhaust pipe 7 and the exhaust channel 6. The width of the exhaust pipe 7 abuts against one end of the pressure relief component. When the air pressure in the exhaust channel 6 is too high, the exhaust pipe 7 will squeeze the spring 9 to compress it. At this time, the exhaust pipe 7 no longer obstructs one end of the pressure relief component, thus realizing the pressure relief function.

[0030] In this embodiment, the pressure relief assembly includes a first pressure relief channel 10 and a second pressure relief channel 11, which are offset at one end near the exhaust pipe 7. The first pressure relief channel 10 and the second pressure relief channel 11 can achieve two pressure reliefs, ensuring stable pressure relief while keeping the dynamic gap between the floating carbon ring 4 and the impeller shaft within a reasonable range.

[0031] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0032] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A carbon ring seal for use in a process compressor, comprising a housing (1), wherein the housing (1) has a central hole inside for receiving an impeller shaft insertion, characterized in that: The housing (1) is provided with an air intake channel (2) communicating with the central hole. The housing (1) is provided with an annular receiving groove (3) coaxial with the central hole. The receiving groove (3) is provided with a floating carbon ring (4) sleeved on the outer wall of the impeller shaft. The housing (1) is provided with an exhaust channel (6). The air intake channel (2) and the exhaust channel (6) are connected by the floating carbon ring (4) to form a sealed air passage, so that the intake air passes through the floating carbon ring (4) and is discharged from the exhaust channel (6). The receiving groove (3) is provided with a rubber ring (5), which is sleeved on the outer wall of the floating carbon ring (4). A gap is left between the rubber ring (5) and the inner wall of the receiving groove (3) to allow for its deformation, so as to stabilize the gap between the floating carbon ring (4) and the impeller shaft.

2. The carbon ring seal for a process compressor as described in claim 1, characterized in that: The floating carbon rings (4) are arranged in three sets. The intake channel (2) is located between the two floating carbon rings (4) that are far away from the impeller, and the exhaust channel (6) is located between the two floating carbon rings (4) that are close to the impeller.

3. A carbon ring seal for a process compressor as described in claim 2, characterized in that: The width of the floating carbon ring (4) closer to the impeller side is greater than the width of the two floating carbon rings (4) farther from the impeller side.

4. A carbon ring seal for use in a process compressor as described in any one of claims 1-3, characterized in that: The cross-section of the exhaust channel (6) is a T-shaped structure with a wider inner section and a narrower outer section. The housing (1) is provided with a pressure relief component that communicates with the wider part of the exhaust channel (6).

5. A carbon ring seal for a process compressor as described in claim 4, characterized in that: The exhaust channel (6) is provided with a T-shaped exhaust pipe (7) coaxial with it. An exhaust hole (8) is provided in the exhaust pipe (7) along its length direction. A spring (9) is provided between the T-shaped exhaust pipe (7) and the exhaust channel (6). The width of the exhaust pipe (7) abuts against one end of the pressure relief assembly.

6. A carbon ring seal for a process compressor as described in claim 5, characterized in that: The pressure relief assembly includes a first pressure relief channel (10) and a second pressure relief channel (11), which are offset at one end near the exhaust pipe (7).

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