Carbon ring sealing structure of centrifugal compressor

Abstract

The centrifugal compressor carbon ring sealing structure comprises a first shaft sleeve and a second shaft sleeve, the interior of the first shaft sleeve and the interior of the second shaft sleeve are each provided with two limiting grooves, the interiors of the limiting grooves are each connected with a carbon ring piece in a sliding mode, the interior of the first shaft sleeve and the interior of the second shaft sleeve are each provided with a cavity, and the carbon ring pieces are connected with the cavities in a sliding mode. A cavity is formed in the first shaft sleeve, a limiting plate is slidably connected into the cavity, an abutting column is fixedly connected to one side of the outer portion of the limiting plate, a telescopic assembly is arranged in the cavity and can adjust the abutting column, and a positioning assembly is arranged on the outer portion of the first shaft sleeve. According to the utility model, when the carbon ring piece is abraded, the carbon ring piece and the external connecting piece can be kept in close contact, so that the phenomenon of poor sealing effect caused by abrasion is avoided, the relative displacement of the carbon ring piece and the connecting piece is reduced, the abrasion is reduced, and the service life of the carbon ring is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of carbon ring seal structures of centrifugal compressors, in particular to a carbon ring seal structure of a centrifugal compressor. Background Art

[0002] A carbon ring seal structure of a centrifugal compressor is a high-performance sealing solution, mainly used for high-speed rotating equipment such as centrifugal compressors, turbomachinery, steam turbines, etc. This sealing structure uses a ring-shaped seal made of carbon material, usually called a carbon ring or a carbon seal ring, to maintain stable sealing performance in high-speed rotation and high-temperature environments.

[0003] Chinese Patent CN214662015U discloses a carbon ring seal structure of a centrifugal compressor, including a shaft sleeve. A plurality of annular grooves are provided inside the shaft sleeve. Carbon rings are provided at the annular grooves of the shaft sleeve. An arc-shaped groove is provided on one side outside the shaft sleeve. A cylindrical groove is provided at one side of the arc-shaped groove of the shaft sleeve. A rotating column is fixedly connected at the cylindrical groove of the shaft sleeve. One end of the rotating column is rotatably connected to an arc-shaped plate through a rotating shaft at the arc-shaped groove. Rectangular clamping holes are provided on one side of the arc-shaped plate and one side of the shaft sleeve. A triangular clamping groove is provided at one side of the rectangular clamping hole of the arc-shaped plate. A rectangular clamping strip is provided inside the rectangular clamping hole of the shaft sleeve. Triangular grooves are provided on both sides of the rectangular clamping strip. Triangular clamping blocks are rotatably connected through rotating shafts at one side of the triangular grooves of the rectangular clamping strip. By setting the arc-shaped plate that can be opened and closed, the convenience of replacing the carbon ring is improved without affecting its sealing performance.

[0004] However, relative displacement will occur between the carbon ring and the external parts during the use of this technical solution, and then wear will occur, resulting in weakened sealing performance and then reducing the service life of the carbon ring. Therefore, a carbon ring seal structure of a centrifugal compressor is proposed to solve the above problems. Summary of the Invention

[0005] The purpose of the utility model is to provide a carbon ring seal structure of a centrifugal compressor for the deficiencies of the prior art. By installing a plurality of rubber columns and abutting columns inside the first shaft sleeve and the second shaft sleeve, the seal ring can be in close contact with the carbon ring part. At the same time, under the elastic action of the spring, when the carbon ring part wears, the carbon ring part can be kept in close contact with the external parts, avoiding the phenomenon of poor sealing effect caused by wear.

[0006] To achieve the above purpose, the utility model provides the following technical solutions:

[0007] A carbon ring seal structure for a centrifugal compressor, comprising a first shaft sleeve and a second shaft sleeve. Both the interior of the first shaft sleeve and the interior of the second shaft sleeve are provided with two limiting grooves. Carbon ring members are slidably connected inside the limiting grooves. Cavities are provided inside both the first shaft sleeve and the second shaft sleeve. A limiting plate is slidably connected inside the cavity. One side of the exterior of the limiting plate is fixedly connected with a resisting column. A telescopic assembly is arranged inside the cavity, and the telescopic assembly can adjust the resisting column. A positioning assembly is arranged outside the first shaft sleeve, and the positioning assembly can assist in the installation of the first shaft sleeve and the second shaft sleeve;

[0008] As a further description of the above technical solution:

[0009] The telescopic assembly includes a rubber column. One side of the exterior of the rubber column is fixedly connected to one side inside the cavity. The other side of the rubber column is fixedly connected to the side of the limiting plate away from the resisting column. A spring is sleeved outside the rubber column;

[0010] As a further description of the above technical solution:

[0011] One end of the spring is fixedly connected to the exterior of the rubber column, and the other end of the spring is fixedly connected to one side inside the cavity;

[0012] As a further description of the above technical solution:

[0013] A sealing ring is slidably connected inside the limiting groove, and the exterior of the sealing ring is in contact with the exterior of the carbon ring member;

[0014] As a further description of the above technical solution:

[0015] The exterior of the resisting column is in contact with the exterior of the sealing ring, and the exterior of the resisting column is slidably connected to the inner wall of the cavity;

[0016] As a further description of the above technical solution:

[0017] The positioning assembly includes two positioning pins. One side of each of the two positioning pins is fixedly connected to the exterior of the right side of the first shaft sleeve. Two positioning holes are provided on the left side of the second shaft sleeve. The exterior of the positioning pin is slidably connected to the inner wall of the positioning hole;

[0018] As a further description of the above technical solution:

[0019] Installation grooves are provided on both the front and back sides of the first shaft sleeve and the front and back sides of the second shaft sleeve. Fixing bolts are respectively threadedly connected to the interiors of the front and back sides of the first shaft sleeve. Fixing nuts are threadedly connected to the exteriors of the fixing bolts. Leakage holes are provided inside both the first shaft sleeve and the second shaft sleeve;

[0020] As a further description of the above technical solution:

[0021] The external thread of the fixing bolt is connected inside the second bushing, and the outside of the fixing nut is slidably connected to the inner wall of the installation groove.

[0022] The beneficial effects of the present utility model are as follows:

[0023] (1) By installing a plurality of rubber columns and abutting columns inside the first bushing and the second bushing, the present utility model can make the sealing ring contact the carbon ring member tightly. At the same time, under the elastic action of the spring, when the carbon ring member wears, the carbon ring member can keep in close contact with the external member, avoiding the phenomenon of poor sealing effect caused by wear.

[0024] (2) The positioning hole inside the second bushing of the present utility model can position the positioning pin, facilitating the docking of the first bushing and the second bushing, reducing the relative displacement between the carbon ring member and the connecting member, reducing wear, and increasing the service life of the carbon ring.

[0025] In summary, the present utility model has the advantages of strong adaptability, simple operation, and high flexibility. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0027] Figure 2 is a schematic diagram of the structure of the sealing ring of a carbon ring seal structure of a centrifugal compressor proposed by the present utility model;

[0028] Figure 3 is a schematic diagram of the structure of the first bushing of a carbon ring seal structure of a centrifugal compressor proposed by the present utility model;

[0029] Figure 4 is Figure 3 the enlarged view at A in

[0030] Legend:

[0031] 1. First bushing; 2. Second bushing; 3. Limit groove; 4. Carbon ring member; 5. Sealing ring; 6. Cavity; 7. Rubber column; 8. Spring; 9. Limit plate; 10. Abutting column; 11. Positioning pin; 12. Positioning hole; 13. Installation groove; 14. Fixing bolt; 15. Fixing nut; 16. Leakage hole. DETAILED DESCRIPTION OF THE INVENTION

[0032] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0033] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, "a plurality" means two or more, unless otherwise specifically defined.

[0034] Embodiment 1

[0035] As Figure 1 - Figure 2 shown, this embodiment provides a carbon ring seal structure for a centrifugal compressor, including a first shaft sleeve 1 and a second shaft sleeve 2. First, the first shaft sleeve 1 and the second shaft sleeve 2 are placed in appropriate positions. Two limiting grooves 3 are respectively provided inside the first shaft sleeve 1 and the second shaft sleeve 2. Carbon ring members 4 are slidably connected inside the limiting grooves 3. Then, the carbon ring members 4 are placed into the limiting grooves 3. A sealing ring 5 is slidably connected inside the limiting grooves 3. First, the sealing rings 5 are respectively placed into the limiting grooves 3. The outer part of the sealing ring 5 is in contact with the outer part of the carbon ring member 4. At this time, the carbon ring member 4 is in contact with the sealing ring 5. An external component is placed in the middle of the first shaft sleeve 1 and the second shaft sleeve 2. The carbon ring member 4 is forced to press the sealing ring 5 inward. Chambers 6 are respectively provided inside the first shaft sleeve 1 and the second shaft sleeve 2. A limiting plate 9 is slidably connected inside the chamber 6. One side of the outer part of the limiting plate 9 is fixedly connected with a resisting column 10. When the sealing ring 5 is stressed, it will press the resisting column 10 inward.

[0036] Embodiment 2

[0037] As Figure 2 - Figure 3As shown, the components that are the same or corresponding to those in the first embodiment are labeled with the corresponding reference numerals in the first embodiment. For the sake of simplicity, only the differences from the first embodiment will be described below. The differences between the second embodiment and the first embodiment are as follows:

[0038] A telescopic component is arranged inside the cavity 6. The telescopic component includes a rubber column 7. One side of the outside of the rubber column 7 is fixedly connected to one side inside the cavity 6, and the other side of the rubber column 7 is fixedly connected to the side of the limiting plate 9 away from the abutting column 10. After the abutting column 10 is stressed, the rubber column 7 is squeezed inward through the limiting plate 9. A spring 8 is sleeved outside the rubber column 7, and at the same time, the spring 8 is also stressed and compressed. One end of the spring 8 is fixedly connected to the outside of the rubber column 7, and the other end of the spring 8 is fixedly connected to one side inside the cavity 6. After being stressed and compressed, the spring 8 will absorb the external force and generate a reaction force on the limiting plate 9.

[0039] The telescopic component can adjust the abutting column 10. The outside of the abutting column 10 is in contact with the outside of the sealing ring 5. The outside of the abutting column 10 is slidably connected to the inner wall of the cavity 6, so that the abutting column 10 presses the sealing ring 5 outward, so as to be in closer contact with the carbon ring part 4. Under the elastic action of the spring 8, when the carbon ring part 4 wears, the carbon ring part 4 can be kept in close contact with the external part, avoiding the poor sealing effect caused by wear.

[0040] Embodiment Three

[0041] As Figure 3 - Figure 4 shown, the components that are the same or corresponding to those in the first embodiment are labeled with the corresponding reference numerals in the first embodiment. For the sake of simplicity, only the differences from the first embodiment will be described below. The differences between the third embodiment and the first embodiment are as follows:

[0042] A positioning component is arranged outside the first sleeve 1. The positioning component can assist in the installation of the first sleeve 1 and the second sleeve 2. The positioning component includes two positioning pins 11. One side of the two positioning pins 11 is respectively fixedly connected to the outside of the right side of the first sleeve 1. Two positioning holes 12 are opened on the left side of the second sleeve 2. The outside of the positioning pin 11 is slidably connected to the inner wall of the positioning hole 12. The positioning pin 11 is inserted into the inside of the positioning hole 12. Installation grooves 13 are opened on the front and back sides of the first sleeve 1 and the second sleeve 2. Fixing bolts 14 are respectively threadedly connected to the inside of the front and back sides of the first sleeve 1. The outside of the fixing bolt 14 is threadedly connected to the inside of the second sleeve 2. Then the fixing bolt 14 is inserted into the inside of the first sleeve 1 and the second sleeve 2. A fixing nut 15 is threadedly connected to the outside of the fixing bolt 14. The fixing nut 15 is used for fixing. The outside of the fixing nut 15 is slidably connected to the inner wall of the installation groove 13. Leakage holes 16 are opened in the inside of the first sleeve 1 and the second sleeve 2, reducing the relative displacement between the carbon ring part 4 and the connecting part, reducing wear, and improving the carbon ring life.

[0043] Working Steps

[0044] Step 1: First, place the first bushing 1 and the second bushing 2 in appropriate positions. First, place the sealing rings 5 into the inner parts of the limiting grooves 3 respectively, and then place the carbon ring parts 4 into the inner parts of the limiting grooves 3. At this time, the carbon ring parts 4 are in contact with the sealing rings 5. Then, insert the positioning pins 11 into the inner parts of the positioning holes 12, and then insert the fixing bolts 14 into the first bushing 1 and the second bushing 2, and fix them with the fixing nuts 15.

[0045] Step 2: Then, place the external part into the middle of the first bushing 1 and the second bushing 2. At this time, the carbon ring parts 4 are forced to squeeze the sealing rings 5 inward. When the sealing rings 5 are stressed, they will squeeze the abutting columns 10 inward. After the abutting columns 10 are stressed, they will squeeze the rubber columns 7 inward through the limiting plates 9. At the same time, the springs 8 will also be stressed and compressed. After the springs 8 are stressed and compressed, they will absorb the external force and generate a reaction force on the limiting plates 9, so that the abutting columns 10 will push the sealing rings 5 outward, so as to be in closer contact with the carbon ring parts 4.

[0046] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A carbon ring seal structure for a centrifugal compressor, comprising a first shaft sleeve and a second shaft sleeve, characterized in that, Two limiting grooves are provided inside both the first bushing and the second bushing. Carbon ring parts are slidably connected inside the limiting grooves. Cavities are provided inside both the first bushing and the second bushing. Limiting plates are slidably connected inside the cavities. A contact post is fixedly connected to the outer side of one side of the limiting plate. A telescopic assembly is provided inside the cavity, and the telescopic assembly can adjust the contact post. A positioning assembly is provided outside the first bushing, and the positioning assembly can assist in the installation of the first bushing and the second bushing.

2. The carbon ring seal structure of a centrifugal compressor according to claim 1, characterized in that, The telescopic assembly includes a rubber column. One outer side of the rubber column is fixedly connected to one inner side of the cavity. The other side of the rubber column is fixedly connected to the side of the limiting plate away from the contact post. A spring is sleeved outside the rubber column.

3. The carbon ring seal structure of a centrifugal compressor according to claim 2, characterized in that, One end of the spring is fixedly connected to the outside of the rubber column, and the other end of the spring is fixedly connected to one inner side of the cavity.

4. A carbon ring seal structure for a centrifugal compressor according to claim 1, characterized in that, A sealing ring is slidably connected inside the limiting groove, and the outside of the sealing ring is in contact with the outside of the carbon ring part.

5. The carbon ring seal structure of a centrifugal compressor according to claim 4, characterized in that, The outside of the contact post is in contact with the outside of the sealing ring, and the outside of the contact post is slidably connected to the inner wall of the cavity.

6. The carbon ring seal structure of a centrifugal compressor according to claim 1, characterized in that, The positioning assembly includes two positioning pins. One sides of the two positioning pins are respectively fixedly connected to the outer side of the right side of the first bushing. Two positioning holes are provided on the left side of the second bushing. The outside of the positioning pin is slidably connected to the inner wall of the positioning hole.

7. The carbon ring seal structure of a centrifugal compressor according to claim 1, characterized in that, Installation grooves are provided on the front and rear sides of both the first bushing and the second bushing. Fixing bolts are respectively threadedly connected to the inner parts of the front and rear sides of the first bushing. Fixing nuts are threadedly connected to the outside of the fixing bolts. Leakage holes are provided inside both the first bushing and the second bushing.

8. A carbon ring seal structure for a centrifugal compressor according to claim 7, characterized in that, The outside of the fixing bolt is threadedly connected to the inside of the second bushing, and the outside of the fixing nut is slidably connected to the inner wall of the installation groove.

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