CN220706015U - Self-adjusting sealing device for biogas conveying air suspension centrifugal compressor - Google Patents
Self-adjusting sealing device for biogas conveying air suspension centrifugal compressor Download PDFInfo
- Publication number
- CN220706015U CN220706015U CN202322353513.8U CN202322353513U CN220706015U CN 220706015 U CN220706015 U CN 220706015U CN 202322353513 U CN202322353513 U CN 202322353513U CN 220706015 U CN220706015 U CN 220706015U
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- sealing
- sealing ring
- ring groove
- self
- biogas
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- 238000007789 sealing Methods 0.000 title claims abstract description 166
- 239000000725 suspension Substances 0.000 title claims abstract description 18
- 238000001816 cooling Methods 0.000 claims description 8
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 238000005299 abrasion Methods 0.000 abstract description 10
- 230000007547 defect Effects 0.000 abstract description 7
- 239000007789 gas Substances 0.000 description 24
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 6
- 238000005086 pumping Methods 0.000 description 6
- 230000000903 blocking effect Effects 0.000 description 4
- 230000001105 regulatory effect Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000003068 static effect Effects 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical group O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 2
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
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- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The utility model provides a self-adjusting sealing device for a biogas-conveying air suspension centrifugal compressor, which comprises a motor shell, wherein a sealing cover plate is arranged at one end of the motor shell; the compressor impeller is provided with a sealing ring; the plane of the sealing ring is provided with a gas film gas inlet hole, the curved surface of the sealing ring is provided with a sealing ring groove, the sealing ring groove is provided with a wedge-shaped groove and a vent hole, and the vent hole is communicated with the gas film gas inlet hole; a sealing sleeve is arranged in the sealing ring groove. Therefore, the wedge-shaped groove forms an air flow pump suction along with the high-speed rotation of the permanent magnet rotor, and a high-speed rotation air film is formed between the sealing ring groove and the sealing sleeve, so that friction between the sealing ring groove and the sealing sleeve is avoided, abrasion of the sealing sleeve is reduced, and leakage gas is prevented from passing through. Meanwhile, the sealing sleeve solves the defects of small radial offset and easy abrasion of the traditional cylindrical surface sealing ring.
Description
Technical Field
The utility model is suitable for the field of compressor sealing, and provides a self-adjusting sealing device for a biogas-conveying air suspension centrifugal compressor.
Background
The methane is a mixed gas, the main component is methane, and the methane is carbon dioxide and hydrogen sulfide, so that in the gas conveying process, if the hydrogen sulfide gas leaks into the motor, the motor can be corroded, the service life of a compressor is greatly influenced, and the gas conveying safety coefficient is reduced; it is important to seal the compressor end of the air suspension centrifugal compressor.
In order to minimize leakage of biogas from the gap between the compressor housing and the compressor impeller, a labyrinth seal groove is arranged at the back of the compressor impeller and the seal cover plate in a conventional sealing manner, but the conventional sealing manner is insufficient to completely seal the gap between the compressor housing and the compressor impeller.
Disclosure of Invention
In order to solve the problems in the prior art, the utility model aims to provide a self-adjusting sealing device for a biogas-conveying air suspension centrifugal compressor, which comprises a motor shell, wherein a sealing cover plate is arranged at one end of the motor shell, a permanent magnet rotor is arranged in the motor shell through two radial air bearings, and a compressor impeller penetrating through the sealing cover plate is arranged at one end of the permanent magnet rotor; a sealing ring is arranged on the compressor impeller;
the end wall of the sealing ring is provided with a gas film gas inlet hole, the side wall of the sealing ring is provided with a sealing ring groove, and the inner side surface of the sealing ring groove is provided with a wedge-shaped groove; the bottom of the sealing ring groove is provided with a vent hole which is communicated with the air film air inlet hole; and a sealing sleeve is arranged in the sealing ring groove and is abutted with the sealing cover plate.
Further, a compressor shell is arranged on the motor shell, a motor stator is arranged in the motor shell, and a motor end cover is arranged at one end, far away from the compressor impeller, of the motor shell.
Furthermore, the sealing ring groove is provided with two sealing rings.
Further, a cooling fan is arranged at one end of the permanent magnet rotor, which is close to the motor end cover.
Further, the cross section of the sealing sleeve is U-shaped.
Furthermore, three wedge-shaped grooves are formed in each inner side face of the sealing ring groove, and the three wedge-shaped grooves are uniformly distributed on the inner side face of the sealing ring groove.
The utility model relates to a mechanical sealing device for an air suspension centrifugal compressor, which describes a gas film blocking sealing structure for a compressor for biogas transportation, in particular to a self-adjusting sealing device for the air suspension centrifugal compressor for biogas transportation, wherein a sealing ring is fixedly connected with an impeller of the compressor and rotates along with a permanent magnet rotor at a high speed; the sealing ring rotates at a high speed along with the impeller of the compressor, and the wedge-shaped groove rotates at the same high speed to form an air flow pumping function, so that the sealing ring groove and the side surface of the sealing sleeve form high-speed rotating air flow, an air film is formed, friction between the sealing ring and the sealing sleeve is avoided, abrasion of the sealing sleeve is reduced, and meanwhile leakage gas is prevented from passing through. Meanwhile, the sealing sleeve can be outwards expanded by high-speed rotation and is supported and attached with the sealing cover plate, so that leakage gas is prevented from passing through, a gas film exists simultaneously during attachment, the sealing sleeve and the sealing cover plate are relatively static, and the gas film plays roles of supporting the sealing sleeve and blocking the leakage gas; further reducing the defect of easy abrasion of the sealing sleeve.
Meanwhile, in the unstable starting state of the permanent magnet rotor, the sealing sleeve can well limit the radial swing of the rotor, so that the axial position is self-regulated; the defect that the traditional cylindrical surface sealing ring is small in radial offset and easy to wear is overcome.
Drawings
FIG. 1 is a block diagram of an air suspension centrifugal compressor;
FIG. 2 is an enlarged view of the portion A of FIG. 1;
FIG. 3 is a block diagram of a seal cartridge;
FIG. 4 is a block diagram of a seal ring;
in the figure: 1-a compressor wheel; 2-a compressor housing; 3-sealing the cover plate; 4-sealing sleeve; 5-a sealing ring; 51-sealing ring grooves; 52-an air film air inlet hole; 53-wedge grooves; 54-vent holes; 6-radial air bearings; 7-permanent magnet rotors; 9-a motor housing; 10-a motor stator; 11-a rear bearing seat; 12-motor end caps; 13-cooling fans.
Detailed Description
The present utility model will be described in further detail with reference to the accompanying drawings, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.
Referring to fig. 1-4, the utility model aims to provide a self-adjusting sealing device for a biogas-conveying air suspension centrifugal compressor, which comprises a motor shell 9, wherein the motor shell 9 is a motor shell of a permanent magnet motor; the sealed apron 3 is installed to one end of motor casing 9, the permanent magnet rotor 7 is installed through two radial air bearings 6 to motor casing 9 inside, contains the stator mechanism that drives permanent magnet rotor 7 high-speed rotation in the motor casing 9, drives permanent magnet rotor 7 high-speed rotation after the circular telegram. One end of the permanent magnet rotor 7 is provided with a compressor impeller 1 penetrating through the sealing cover plate 3; the compressor impeller 1 is fixedly connected with one end of the permanent magnet rotor 7, and the permanent magnet rotor 7 can drive the compressor impeller 1 to rotate at a high speed. Specifically, a hole is formed in the center of the sealing cover plate 3, one end, close to the permanent magnet rotor 7, of the compressor impeller 1 penetrates through the hole of the sealing cover plate 3, and impeller blades are mounted at the other end. A sealing ring 5 is arranged on the compressor impeller 1; specifically, the sealing ring 5 is installed between the sleeving part of the compressor impeller 1 and the sealing cover plate 3. The sealing ring 5 is fixed with the compressor wheel 1 by an interference fit.
The end wall of the sealing ring 5 is provided with a gas film air inlet hole 52, and it is to be noted that the gas film air inlet hole 52 facing the permanent magnet rotor 7 on the sealing ring 5 is in an unblocked state, the two end walls of the sealing ring 5 are provided with gas film air inlet holes 52 during production processing, the gas film air inlet holes 52 on the two end walls are communicated, and the gas film air inlet hole 52 on the surface of the sealing ring 5 far away from the permanent magnet rotor 7 is abutted against one surface of the compressor impeller 1 after installation, so that the sealing ring is closed. A sealing ring groove 51 is formed in the side wall of the sealing ring 5, and a wedge groove 53 is formed in the side wall of the sealing ring groove 51; a sealing ring groove 51 on the sealing ring 5, each side wall is provided with a wedge-shaped groove 53, the bottom of the sealing ring groove 51 is provided with a vent hole 54, and the vent hole 54 is communicated with the air film air inlet hole 52; the sealing ring groove 51 is internally provided with a sealing sleeve 4, and the sealing sleeve 4 is abutted with the sealing cover plate 3.
Device implementation and principle:
the sealing ring 5 is fixedly connected with the compressor impeller 1 and rotates at a high speed along with the permanent magnet rotor 7; wedge grooves 53 are uniformly distributed in the sealing ring grooves 51 on the sealing ring 5, and simultaneously, vent holes 54 arranged at the bottom of the grooves are communicated with air film air inlet holes 52 of the sealing ring 5; at this time, in the process that the sealing ring 4 rotates at a high speed along with the compressor impeller 1, because of the structural form of the wedge-shaped groove 53, an air flow pumping function is formed, so that the sealing ring groove 51 and the side surface of the sealing sleeve 4 form high-speed rotating air flow, an air film is formed, friction between the sealing ring 5 and the sealing sleeve 4 is avoided, abrasion of the sealing sleeve 4 is reduced, and meanwhile, leakage air is prevented from passing through.
Meanwhile, the sealing sleeve 4 can expand like a spring and is supported and attached with the inner side surface of the hole of the sealing cover plate 3, namely the cylindrical hole, so that leakage gas is prevented from passing through; besides, in the process of high-speed operation of the permanent magnet rotor 7, the sealing ring 5 is in an interference fit state with the compressor impeller 1 and rotates along with the compressor impeller 1, and because the sealing ring groove 51 and the side surface of the sealing sleeve 4 form high-speed rotating air flow, under the action of the air film, the sealing sleeve 4 can be supported and attached with the inner side surface of the hole of the sealing cover plate 3 after being expanded outwards like a spring, and the sealing sleeve is kept in a static state, at the moment, the sealing ring 5 and the sealing sleeve 4 are in a clearance fit state, and abrasion does not occur between the sealing ring 5 and the sealing sleeve 4, so that the defect that the sealing sleeve 4 is easy to wear is further improved.
Meanwhile, in the unstable starting state of the permanent magnet rotor 7, the sealing sleeve 4 can well limit the radial swing of the rotor, so that the axial position is self-regulated; the defect that the traditional cylindrical surface sealing ring is small in radial offset and easy to wear is overcome.
Preferably, the compressor housing 2 is mounted on the motor housing 9, the motor stator 10 is mounted inside the motor housing 9, and a motor end cover 12 is mounted at one end of the motor housing 9 away from the compressor impeller 1. When the magnetic field generated by the motor stator 10 in the motor shell 9 interacts with the magnetic field generated by the permanent magnet rotor 7, the permanent magnet rotor 7 is operated; the motor end cap 12 plays a role of sealing the inside of the motor housing 9 from the outside.
Preferably, the sealing ring groove 51 is provided with two sealing rings 5. Correspondingly, each sealing ring groove 51 on the sealing ring 5 is internally provided with a wedge groove 53 and a sealing sleeve 4, the two sealing ring grooves 51 act together to further enhance the air flow pumping action of the wedge groove 53, and under the high-speed running of the permanent magnet rotor 7, the formed air model ensures that the sealing performance of the device is more excellent; on the other hand, the two sealing sleeves 4 bear the abrasion caused by radial swing of the rotor, the abrasion of the sealing sleeves 4 caused by self-adjustment of the axial positions of the permanent magnet rotor 7 and the compressor impeller 1 is slower, and the internal maintenance period of the air suspension centrifugal compressor can be prolonged.
Preferably, a cooling fan 13 is mounted at one end of the permanent magnet rotor 7 near the motor end cover 12. Specifically, the motor end cover 12 is provided with a cooling fan 13, and the cooling fan 13 is arranged on the permanent magnet rotor 7 close to the motor end cover 12. The permanent magnet rotor 7 drives the cooling fan 13 to rotate, and the motor end cover 12 is cooled by air cooling.
Preferably, the cross section of the sealing sleeve 4 is horseshoe-shaped. The cross section of the sealing sleeve 4 is in a horseshoe shape, specifically, the outer side of the sealing sleeve 4 is a semicircular surface, the inner ring is a plane, and compared with the outer side surface of a cylindrical surface of the traditional sealing sleeve 4, the horseshoe shape can well play a role in limiting the radial swing of the rotor, so that the axial position is self-regulated; the defect that the traditional cylindrical surface sealing ring is small in radial offset and easy to wear is overcome.
Preferably, three wedge grooves 53 are provided on each inner side surface of the seal ring groove 51, and the three wedge grooves 53 are uniformly distributed on the inner side surface of the seal ring groove 51. The three-way wedge-shaped groove 53 further enhances the pumping action of the air flow, increases the pumping air flow rate under the high-speed running of the permanent magnet rotor 7, and simultaneously forms an air model to ensure that the sealing performance of the device is more excellent.
The utility model relates to a mechanical sealing device for an air suspension centrifugal compressor, which describes a gas film blocking sealing structure for a compressor for biogas transportation, in particular to a self-adjusting sealing device for the air suspension centrifugal compressor for biogas transportation, wherein a sealing ring 5 is fixedly connected with a compressor impeller 1 and rotates along with a permanent magnet rotor 7 at a high speed; the sealing ring 4 rotates at a high speed along with the compressor impeller 1, and the wedge groove 53 rotates at a high speed to form an air flow pumping function, so that the sealing ring groove 51 and the side surface of the sealing sleeve 4 form high-speed rotating air flow, an air film is formed, friction between the sealing ring 5 and the sealing sleeve 4 is avoided, abrasion of the sealing sleeve 4 is reduced, and meanwhile leakage gas is prevented from passing through. Meanwhile, the sealing sleeve 4 can be outwards expanded by high-speed rotation and is supported and attached with the sealing cover plate 3, so that leakage gas is prevented from passing through, a gas film exists simultaneously during attachment, the sealing sleeve 4 and the sealing cover plate 3 are relatively static, and the gas film plays roles of supporting the sealing sleeve 4 and blocking the leakage gas; further reducing the disadvantage of easy abrasion of the sealing sleeve 4.
Meanwhile, in the unstable starting state of the permanent magnet rotor 7, the sealing sleeve 4 can well limit the radial swing of the rotor, so that the axial position is self-regulated; the defect that the traditional cylindrical surface sealing ring is small in radial offset and easy to wear is overcome.
Of course, the present utility model is capable of other various embodiments and its several details are capable of modification and variation in light of the present utility model, as will be apparent to those skilled in the art, without departing from the spirit and scope of the utility model as defined in the appended claims.
Claims (6)
1. The self-adjusting sealing device for the biogas-conveying air-suspending centrifugal compressor comprises a motor shell (9), and is characterized in that a sealing cover plate (3) is arranged at one end of the motor shell (9), a permanent magnet rotor (7) is arranged inside the motor shell (9) through two radial air bearings (6), and a compressor impeller (1) penetrating through the sealing cover plate (3) is arranged at one end of the permanent magnet rotor (7); a sealing ring (5) is arranged on the compressor impeller (1);
the end wall of the sealing ring (5) is provided with a gas film gas inlet hole (52), the side wall of the sealing ring (5) is provided with a sealing ring groove (51), and the inner side surface of the sealing ring groove (51) is provided with a wedge-shaped groove (53); the bottom of the sealing ring groove (51) is provided with a vent hole (54), and the vent hole (54) is communicated with the air film air inlet hole (52); a sealing sleeve (4) is arranged in the sealing ring groove (51), and the sealing sleeve (4) is abutted with the sealing cover plate (3).
2. Self-regulating sealing device for biogas-conveying air-suspension centrifugal compressors according to claim 1, characterized by the fact that the motor housing (9) is provided with a compressor housing (2), the motor housing (9) is internally provided with a motor stator (10), and the end of the motor housing (9) remote from the compressor impeller (1) is provided with a motor end cover (12).
3. Self-adjusting sealing device for biogas-conveying air-suspension centrifugal compressors according to claim 1, characterized by the fact that the sealing ring groove (51) is provided with two sealing rings (5).
4. Self-regulating sealing device for biogas-conveying air-suspension centrifugal compressors according to claim 2, characterized by the fact that the permanent magnet rotor (7) is fitted with a cooling fan (13) at the end close to the motor end cap (12).
5. Self-adjusting sealing device for biogas-conveying air-suspension centrifugal compressors according to claim 1, characterized by the fact that the sealing sleeve (4) is horseshoe-shaped in cross section.
6. Self-adjusting sealing device for biogas-conveying air-suspension centrifugal compressors according to claim 1, characterized in that each inner side of the sealing ring groove (51) is provided with three wedge grooves (53), the three wedge grooves (53) being evenly distributed on the inner side of the sealing ring groove (51).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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CN202322353513.8U CN220706015U (en) | 2023-08-31 | 2023-08-31 | Self-adjusting sealing device for biogas conveying air suspension centrifugal compressor |
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CN202322353513.8U CN220706015U (en) | 2023-08-31 | 2023-08-31 | Self-adjusting sealing device for biogas conveying air suspension centrifugal compressor |
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CN220706015U true CN220706015U (en) | 2024-04-02 |
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CN202322353513.8U Active CN220706015U (en) | 2023-08-31 | 2023-08-31 | Self-adjusting sealing device for biogas conveying air suspension centrifugal compressor |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN118328757A (en) * | 2024-06-11 | 2024-07-12 | 信尔胜机械(江苏)有限公司 | Heat exchange device for heat recovery of air compressor |
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2023
- 2023-08-31 CN CN202322353513.8U patent/CN220706015U/en active Active
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN118328757A (en) * | 2024-06-11 | 2024-07-12 | 信尔胜机械(江苏)有限公司 | Heat exchange device for heat recovery of air compressor |
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