CN218407546U - Multistage brush type sealing structure with detachable sealing unit - Google Patents
Multistage brush type sealing structure with detachable sealing unit Download PDFInfo
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- CN218407546U CN218407546U CN202222510848.1U CN202222510848U CN218407546U CN 218407546 U CN218407546 U CN 218407546U CN 202222510848 U CN202222510848 U CN 202222510848U CN 218407546 U CN218407546 U CN 218407546U
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- 238000007789 sealing Methods 0.000 title claims abstract description 68
- 238000005553 drilling Methods 0.000 claims 3
- 230000003466 anti-cipated effect Effects 0.000 description 1
- 230000001680 brushing effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
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Abstract
The utility model discloses a can dismantle sealing unit's multistage brush seal structure belongs to turbomachinery sealing technical field. Brush type sealing unit including interval distribution more than two, the center department of brush type sealing unit is provided with the rotor, single brush type sealing unit is by preceding baffle, the brush silk bundle, the backplate is constituteed, preceding baffle is fixed connection in the both ends of brush type sealing unit inside wall respectively with the backplate, the brush silk bundle inlays to be established between preceding baffle and backplate and its free end and rotor contact, the upper portion of two adjacent brush type sealing units is passed through the upper portion connecting piece and is connected, the top connecting piece is installed at the top, the side at top connecting piece both ends and the side at the brush type sealing unit top at both ends pass through the mounting and can dismantle the connection. The utility model discloses can be convenient replace the brush sealing unit that seals the performance reduction in multistage brush seal, guarantee the performance of sealing of whole structure, improve multistage seal structure's life.
Description
Technical Field
The utility model belongs to the technical field of the turbomachinery seal, especially, relate to a can dismantle sealing unit's multistage brush seal structure.
Background
As a novel contact type dynamic seal which is rapidly developed in recent years, a brush seal is commonly used in the field of turbomachine seals of high-speed shafts such as aero-engines, gas turbines and steam turbines, and by virtue of excellent sealing performance and economic benefits of the brush seal (compared with a traditionally used labyrinth seal, the leakage amount of the brush seal is far lower than that of the brush seal, and is only 1/5-1/10 of the leakage amount of the brush seal), the brush seal is successfully used for replacing the traditional labyrinth seal, and is increasingly applied to various turbomachines. According to different use conditions, a single-pole brush seal and a multi-stage brush seal can be selected, and compared with the single-pole brush seal, the multi-stage brush seal can bear larger pressure difference and has better sealing performance.
However, in operation, the free ends of the brush wires contact with the surface of the rotor, the ends of the brush wires are worn, the sealing performance cannot be guaranteed, the service life of the brush seal is reduced, and the current multi-stage brush seal structure has the following problems: 1. multistage brush seal structure comprises two sets of and above sealing unit, along with a set of sealing unit's damage, often can lead the performance of obturating of whole structure to descend, and life also can reduce, 2, multistage brush seal structure multiunit sealing unit are fixed together can't dismantle the change, use economic cost always high.
Therefore, there is a need for a removable multi-stage brush seal structure that solves the above problems.
SUMMERY OF THE UTILITY MODEL
The utility model discloses an unable change alone of the sealed unit of the brush seal structure of above-mentioned multistage is solved to the purpose, along with long-time the use, seals the performance poor, problem that life is not enough provides one kind and can dismantle multistage brush seal structure.
The utility model adopts the technical proposal that: the utility model provides a can dismantle brush seal structure of multistage of sealed unit, brush seal unit 1 including interval distribution more than two, the center department of brush seal unit 1 is provided with rotor 9, single brush seal unit 1 is by preceding baffle 5, brush silk bundle 6, backplate 7 is constituteed, preceding baffle 5 and backplate 7 are fixed connection respectively in the both ends of 1 inside wall of brush seal unit, brush silk bundle 6 inlays to be established between preceding baffle 5 and backplate 7 and its free end and rotor 9 contact, the upper portion of two adjacent brush seal unit 1 is passed through the upper portion connecting piece and is connected, top connecting piece 2 is installed at the top, the side at 2 both ends of top connecting piece and the side at the 1 top of both ends brush seal unit can be dismantled through the mounting and be connected.
Specifically, the mounting include screw 3 and splint 4, the side at 2 both ends of top connecting piece, the side at 1 top at the brush seal unit in both ends are equipped with the screw hole respectively, the one end of splint 4 is equipped with the screw hole that corresponds with 2 side screw holes of top connecting piece, the other end is equipped with the screw hole that corresponds with the side screw hole at 1 top of brush seal unit.
Preferably, an annular cavity 8 is formed at the contact part of the inner surface of the rear baffle 7 and the brush silk bundle 6.
Specifically, the upper connecting piece is a pin 10, adjacent surfaces of two adjacent brush seal units 1 are respectively provided with a drill hole, one end of the pin 10 is positioned in the drill hole of one brush seal unit 1, and the other end of the pin is positioned in the drill hole of the other brush seal unit 1.
Specifically, the upper connecting piece is a backing ring 12, the adjacent surfaces of two adjacent brush seal units 1 are respectively provided with a key groove, and the backing ring 12 is sleeved in the key groove between the two adjacent brush seal units 1.
Preferably, the top connecting member 2 is of a mortise and tenon type embedded structure and is embedded in the brush type sealing unit 1.
Preferably, gaskets are arranged at the joints between the clamping plate 4 and the top connecting piece 2, the joints between the clamping plate 4 and the brush type sealing unit 1, and the joints between the screws 3 and the clamping plate 4.
Preferably, the splint 4 is an embedded splint.
Preferably, a gasket 11 is installed at the connection position between the backing ring 12 and the key groove.
The utility model has the advantages that:
(1) The utility model discloses a coupling assembling's structural design can dismantle the single brush seal unit among the multistage brush seal and replace, will lead to the brush seal unit that sealing performance descends to change because of wearing and tearing, improves multistage brush seal's life, uses the upper portion connecting piece to connect according to the operating mode between the adjacent brush seal unit, can make multistage brush seal structure along with the live time increases, and the performance of obturating does not receive the influence.
(2) The utility model discloses a chooseing for use the top connecting piece of different length, multiplicable or reduce the brush seal unit among the multistage brush seal structure, the upper portion connecting piece of different length can fix the distance between two adjacent brush seal units, realizes anticipated effect of obturating.
Drawings
Fig. 1 is a schematic cross-sectional view of the second-stage sealing structure of the present invention;
fig. 2 is a schematic cross-sectional view of the three-stage sealing structure of the present invention;
FIG. 3 is a schematic side view of the present invention;
FIG. 4 is an enlarged view of a structure at A in FIG. 1;
FIG. 5 is an enlarged view of another structure at A in FIG. 1;
fig. 6 is a partial assembly view of the present invention.
The reference numbers in the figures: 1. a brush seal unit; 2. a top connection member; 3. a screw; 4. a splint; 5. a front baffle; 6. brushing the tows; 7. a tailgate; 8. an annular cavity; 9. a rotor; 10. a pin; 11. a gasket; 12. a backing ring.
Detailed Description
The present invention will be further explained with reference to specific embodiments, but is not limited to the present invention.
Example 1: as shown in fig. 1 to 6, a multistage brush type sealing structure with a detachable sealing unit comprises more than two brush type sealing units 1 distributed at intervals, wherein a rotor 9 is arranged at the center of each brush type sealing unit 1, the rotor 9 is concentric with the brush type sealing units 1 at multiple stages, each brush type sealing unit 1 consists of a front baffle 5, a brush wire bundle 6 and a rear baffle 7, the front baffle 5 and the rear baffle 7 are respectively and fixedly connected with two ends of the inner side wall of the brush type sealing unit 1, the brush wire bundle 6 is embedded between the front baffle 5 and the rear baffle 7, the free end of the brush wire bundle is contacted with the rotor 9, the upper parts of two adjacent brush type sealing units 1 are connected through an upper connecting piece, a top connecting piece 2 is arranged at the top, and the side edges of two ends of the top connecting piece 2 are detachably connected with the side edges of the tops of the brush type sealing units 1 at two ends through fixing pieces.
Furthermore, the fixing piece comprises a screw 3 and a clamping plate 4, the side edges of the two ends of the top connecting piece 2 and the side edges of the top of the brush type sealing unit 1 at the two ends are respectively provided with a threaded hole, one end of the clamping plate 4 is provided with a threaded hole corresponding to the threaded hole of the side edge of the top connecting piece 2, and the other end of the clamping plate is provided with a threaded hole corresponding to the threaded hole of the side edge of the brush type sealing unit 1 at the other end.
Furthermore, the annular cavity 8 is arranged at the contact part of the inner surface of the rear baffle 7 and the brush filament bundle 6, so that the hysteresis effect can be better reduced.
Further, the upper connecting piece is a pin 10, adjacent surfaces of two adjacent brush seal units 1 are respectively provided with a drill hole, one end of the pin 10 is positioned in the drill hole of one brush seal unit 1, and the other end of the pin is positioned in the drill hole of the other brush seal unit 1.
Further, the upper connecting piece is a backing ring 12, the adjacent surfaces of two adjacent brush type sealing units 1 are respectively provided with a key groove, and the backing ring 12 is sleeved in the key groove between the two adjacent brush type sealing units 1.
Further, top connecting piece 2 is the embedded structure in the mortise type, imbeds brush seal unit 1, and the upper surface of top connecting piece 2 and brush seal unit 1's upper surface flush, on the basis that does not change whole brush seal structure, imbeds brush seal unit 1 with top connecting piece 2 in.
Furthermore, the joints between the clamping plate 4 and the top connecting piece 2, the joints between the clamping plate 4 and the brush type sealing unit 1, and the joints between the screw 3 and the clamping plate 4 and between the backing ring 12 and the key groove are all provided with gaskets 11 (only the gasket 11 between the backing ring 12 and the key groove is shown in the figure, and the gaskets 11 at other positions are not shown), so that the gaskets 11 can avoid direct contact of rigid connecting pieces, the structure is more stable, and the sealing performance is better.
Further, the clip plate 4 is an insert type clip plate which can be inserted into the front baffle 5 of the foremost brush seal unit 1 and the back baffle 7 of the rearmost brush seal unit 1, and does not affect the outer shape of the seal structure. .
The utility model discloses a theory of operation is: the number of the brush seal units 1 is selected according to actual needs, the top connecting piece 2 and the brush seal units 1 are connected together through the screws 3 penetrating through corresponding screw holes to form a detachable connection, meanwhile, the two brush seal units 1 are fixed by the pins 10 or the backing rings 12 at intervals, circumferential rotation between the two brush seal units can be avoided, and a desired distance of the brush silk bundles 6 can be obtained by adjusting the length of the pins 10 and the thickness of the backing rings 12. When one brush type sealing unit 1 is damaged or reaches the service life, the brush type sealing unit can be detached and replaced by a new brush type sealing unit 1, the service life of the whole multi-stage brush type sealing structure can be greatly prolonged, the sealing performance of the multi-stage brush type sealing structure is kept stable for a long time, the single brush type sealing unit 1 is replaced, and the use cost is also reduced.
The above has been combined with the accompanying drawings to make a detailed description of the utility model discloses a mode of use, above only do the embodiment of the utility model, not therefore the restriction the patent scope of the utility model, all utilize the equivalent structure or the equivalent flow transform that the content of the utility model discloses the specification and the attached drawing did, or directly or indirectly use in other relevant technical fields, all the same reason is included in the patent protection scope of the utility model.
Claims (9)
1. The utility model provides a can dismantle multistage brush seal structure of sealing unit which characterized in that: brush seal unit (1) including interval distribution more than two, the center department of brush seal unit (1) is provided with rotor (9), single brush seal unit (1) is by preceding baffle (5), brush silk bundle (6), backplate (7) are constituteed, preceding baffle (5) and backplate (7) are fixed connection respectively in the both ends of brush seal unit (1) inside wall, brush silk bundle (6) inlay establish between preceding baffle (5) and backplate (7) and its free end and rotor (9) contact, the upper portion of two adjacent brush seal units (1) is passed through the upper portion connecting piece and is connected, top connecting piece (2) are installed at the top, the side at top connecting piece (2) both ends passes through the mounting with the side at both ends brush seal unit (1) top and can dismantle the connection.
2. The multistage brush type sealing structure of a detachable sealing unit according to claim 1, wherein: the mounting include screw (3) and splint (4), the side at top connecting piece (2) both ends, the side at both ends brush type seal unit (1) top are equipped with the screw hole respectively, the one end of splint (4) is equipped with the screw hole that corresponds with top connecting piece (2) side screw hole, the other end is equipped with the screw hole that corresponds with the side screw hole at brush type seal unit (1) top.
3. The multistage brush type sealing structure of a detachable sealing unit according to claim 1, wherein: and an annular cavity (8) is formed at the contact part of the inner surface of the rear baffle (7) and the brush silk bundle (6).
4. A multistage brush type sealing structure of a detachable sealing unit according to claim 1, wherein: the upper connecting piece is a pin (10), adjacent surfaces of two adjacent brush type sealing units (1) are respectively provided with a drilling hole, one end of the pin (10) is positioned in the drilling hole of one brush type sealing unit (1), and the other end of the pin is positioned in the drilling hole of the other brush type sealing unit (1).
5. The multistage brush type sealing structure of a detachable sealing unit according to claim 1, wherein: the upper connecting piece is a backing ring (12), key grooves are respectively formed in adjacent surfaces of two adjacent brush type sealing units (1), and the backing ring (12) is sleeved in the key grooves between the two adjacent brush type sealing units (1).
6. A multistage brush type sealing structure of a detachable sealing unit according to claim 1, wherein: the top connecting piece (2) is of a mortise and tenon embedded structure and is embedded into the brush type sealing unit (1).
7. The multistage brush type seal structure of a removable seal unit according to claim 2, wherein: and gaskets (11) are arranged at the joints between the clamping plates (4) and the top connecting piece (2) and between the clamping plates (4) and the brush type sealing unit (1) and the joints between the screws (3) and the clamping plates (4).
8. A multistage brush type seal structure of a detachable seal unit according to claim 2, wherein: the splint (4) is an embedded splint.
9. The multistage brush type sealing structure of a detachable sealing unit according to claim 5, wherein: and a gasket (11) is arranged at the joint between the backing ring (12) and the key groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222510848.1U CN218407546U (en) | 2022-09-22 | 2022-09-22 | Multistage brush type sealing structure with detachable sealing unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222510848.1U CN218407546U (en) | 2022-09-22 | 2022-09-22 | Multistage brush type sealing structure with detachable sealing unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218407546U true CN218407546U (en) | 2023-01-31 |
Family
ID=85033867
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222510848.1U Active CN218407546U (en) | 2022-09-22 | 2022-09-22 | Multistage brush type sealing structure with detachable sealing unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218407546U (en) |
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2022
- 2022-09-22 CN CN202222510848.1U patent/CN218407546U/en active Active
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