CN109519227B - Laminated sealing device for high-pressure steam inlet insertion pipe of steam turbine - Google Patents
Laminated sealing device for high-pressure steam inlet insertion pipe of steam turbine Download PDFInfo
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- CN109519227B CN109519227B CN201811274662.2A CN201811274662A CN109519227B CN 109519227 B CN109519227 B CN 109519227B CN 201811274662 A CN201811274662 A CN 201811274662A CN 109519227 B CN109519227 B CN 109519227B
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- steam inlet
- insertion pipe
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- sleeve plate
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D11/00—Preventing or minimising internal leakage of working-fluid, e.g. between stages
- F01D11/003—Preventing or minimising internal leakage of working-fluid, e.g. between stages by packing rings; Mechanical seals
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Abstract
The invention discloses a laminated sealing device for a high-pressure steam inlet insertion pipe of a steam turbine, which comprises a steam inlet insertion pipe and a high-pressure inner cylinder, wherein a plurality of outer sealing rings and a plurality of inner sealing rings are sleeved on the outer side of the steam inlet insertion pipe, the outer sealing rings and the inner sealing rings are arranged at intervals, a sleeve plate and a pressing ring are further sleeved on the steam inlet insertion pipe, the sleeve plate is positioned between the pressing ring and the high-pressure inner cylinder, an annular rubber pad is fixedly connected to the bottom side of the sleeve plate, telescopic grooves are symmetrically formed in the sleeve plate, elastic mechanisms are arranged in the telescopic grooves, and the sleeve plate is connected with an extrusion block through the elastic mechanisms. When the compression ring presses the extrusion block downwards, the extrusion block moves downwards to drive the second spring to compress, meanwhile, the inclined surface on the extrusion block and the inclined end surface on the movable wedge block enable the movable wedge block to slide, then the first spring starts to compress, and the compression ring is prevented from directly extruding the sealing ring by buffering through the elastic force generated by the compression of the first spring and the second spring.
Description
Technical Field
The invention relates to the technical field of high-pressure steam inlet insertion pipes of steam turbines, in particular to a laminated sealing device for the high-pressure steam inlet insertion pipes of the steam turbines.
Background
The steam turbine is also called as steam turbine engine, and is a rotary steam power equipment, and the high-temperature high-pressure steam is passed through fixed nozzle, becomes accelerated air flow, and is sprayed on the blade to make the rotor equipped with blade row rotate, at the same time, it can do work for exterior. Steam turbines are the main equipment of modern thermal power plants, and are also used in the metallurgical industry, chemical industry and ship power plants.
According to Chinese patent numbers: CN202280479U, a laminated sealing device for a high-pressure steam inlet insertion pipe of a steam turbine comprises a pressure ring, a plurality of outer sealing rings and a plurality of inner sealing rings, wherein the inner sealing rings and the outer sealing rings are all sleeved on the outer side of the steam inlet insertion pipe, the outer sealing rings and the inner sealing rings are arranged at intervals, a radial gap is reserved between the inner sealing rings and a steam inlet ring groove of an inner cylinder, a radial gap is reserved between the outer sealing rings and the steam inlet insertion pipe, the device is formed by spacing the outer sealing rings and the inner sealing rings, the inner sealing rings are assembled in a free state and matched with the steam inlet insertion pipe, a radial gap is reserved between the outer sealing rings and the steam inlet insertion pipe, the outer sealing rings and the inner sealing rings are in lap joint sealing to reduce the leakage of the steam between the axial rings, and the inner sealing rings are tightly attached to the end faces of the steam inlet insertion pipe, the outer sealing rings and the steam inlet ring groove of the inner cylinder by means, the inner sealing ring and the outer sealing ring form sealing surfaces respectively, and a sealing surface is formed between the end surfaces of the inner sealing ring and the outer sealing ring, so that a better sealing effect is achieved.
The device utilizes the bolt with clamping ring fixed connection on high-pressure inner casing, has made things convenient for the dismantlement maintenance in later stage, but only fixes through the bolt and compresses tightly and make the clamping ring directly support and press on the sealing ring, if the bolt-up is too tight, the extrusion force that produces in the twinkling of an eye makes the clamping ring extrude the sealing ring to influence the sealed effect of sealing ring.
Disclosure of Invention
The invention aims to solve the defects in the prior art, such as: the device only fixes through the bolt and compresses tightly and make the clamping ring directly support to press on the sealing ring, if the tension of bolt tightening, the extrusion force that produces in the twinkling of an eye makes the clamping ring with sealing ring extrusion deformation to influence the sealed effect of sealing ring.
In order to achieve the purpose, the invention adopts the following technical scheme: the invention relates to a laminated sealing device for a high-pressure steam inlet insertion pipe of a steam turbine, which comprises a steam inlet insertion pipe and a high-pressure inner cylinder, wherein a plurality of outer sealing rings and a plurality of inner sealing rings are sleeved on the outer side of the steam inlet insertion pipe, the outer sealing rings and the inner sealing rings are arranged at intervals, a sleeve plate and a pressing ring are further sleeved on the steam inlet insertion pipe, the sleeve plate is positioned between the pressing ring and the high-pressure inner cylinder, an annular rubber pad is fixedly connected to the bottom side of the sleeve plate, telescopic grooves are symmetrically formed in the sleeve plate, elastic mechanisms are arranged in the telescopic grooves, the sleeve plate is connected with an extrusion block through the elastic mechanisms, sliding devices are symmetrically arranged in the telescopic grooves, a plurality of bolts are connected to the pressing ring in a threaded manner, and one end of each bolt extends; the sliding device comprises a movable wedge block, the movable wedge block is connected to the bottom wall of the telescopic groove in a sliding mode, a first spring is fixedly connected to one side of the movable wedge block, and one end, far away from the movable wedge block, of the first spring is fixedly connected to the side wall of the telescopic groove.
Preferably, the elastic mechanism comprises a plurality of second springs, one end of each second spring is fixedly connected to the bottom wall of the telescopic groove, and the other end of each second spring is fixedly connected to the bottom side of the extrusion block.
Preferably, every all the cover is equipped with flat pad, bullet pad on the bolt, flat pad, bullet pad are located between clamping ring and the bolt, flat pad is located under the bullet pad.
Preferably, a threaded hole matched with the bolt is formed in the high-pressure inner cylinder, and one end of the bolt extending into the high-pressure inner cylinder is connected in the threaded hole in a threaded mode.
Preferably, the movable wedge block is provided with a slope end face, and the bottom side of the extrusion block is symmetrically provided with inclined planes matched with the slope end face.
Compared with the prior art, the invention has the beneficial effects that:
1. when the bolt is screwed into the threaded hole, the pressing ring presses the extrusion block downwards, so that the extrusion block moves downwards to drive the second spring to compress, meanwhile, the inclined surface on the extrusion block and the inclined end surface on the movable wedge block are mutually extruded to enable the movable wedge block to slide, then the first spring starts to compress, the elastic force generated by the compression of the first spring and the second spring is buffered to prevent the pressing ring from directly extruding the sealing ring, the extrusion force indirectly acts on the sealing ring after penetrating through the sleeve plate and the annular rubber pad, and meanwhile, the elastic action of the annular rubber pad can further prevent the sealing ring from being extruded and deformed;
2. the bolt is screwing up gradually and pushing down the in-process, can press from both sides the flat pad between tight and the clamping ring gradually and play the pad, increases the area of contact between bolt and the clamping ring through the flat pad, and dispersion pressure prevents that the clamping ring from being crushed, and the bullet pad receives the back that compresses tightly, can give an elasticity of bolt, supports tight bolt, and the frictional force of increase bolt prevents that it from droing.
Drawings
FIG. 1 is a schematic front structural view of a high-pressure steam inlet pipe laminated sealing device of a steam turbine according to the present invention;
fig. 2 is an enlarged schematic view of a point a in fig. 1.
In the figure: the steam-inlet pipe comprises a steam inlet pipe 1, a high-pressure inner cylinder 2, an outer sealing ring 3, an inner sealing ring 4, a threaded hole 5, a bolt 6, a flat gasket 7, an elastic gasket 8, a sleeve plate 9, a movable wedge block 10, a telescopic groove 11, a first spring 12, a second spring 13, an extrusion block 14, an annular rubber gasket 15, a slope end face 16 and a compression ring 17.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
As shown in fig. 1-2, the laminated sealing device for a high-pressure steam inlet insertion pipe of a steam turbine of the present invention comprises a steam inlet insertion pipe 1 and a high-pressure inner cylinder 2, wherein a plurality of outer sealing rings 3 and a plurality of inner sealing rings 4 are sleeved outside the steam inlet insertion pipe 1, the plurality of outer sealing rings 3 and the plurality of inner sealing rings 4 are arranged at intervals, a sleeve plate 9 and a pressing ring 17 are further sleeved on the steam inlet insertion pipe 1, the sleeve plate 9 is located between the pressing ring 17 and the high-pressure inner cylinder 2, an annular rubber gasket 15 is fixedly connected to the bottom side of the sleeve plate 9, telescopic grooves 11 are symmetrically arranged on the sleeve plate 9, an elastic mechanism is arranged in the telescopic grooves 11, the elastic mechanism comprises a plurality of second springs 13, one end of each second spring 13 is fixedly connected to the bottom wall of the telescopic groove 11, the other end of each second spring 13 is fixedly connected to the bottom side of an extrusion block 14, the pressing ring 17 presses the, the second spring 13 is compressed, so that the second spring 13 is compressed to generate elastic force.
The lagging 9 is connected with extrusion piece 14 through elastic mechanism, the symmetry is equipped with slider in the flexible groove 11, slider includes movable voussoir 10, movable voussoir 10 sliding connection is on the diapire of flexible groove 11, the first spring 12 of one side fixedly connected with of movable voussoir 10, the one end fixed connection that movable voussoir 10 was kept away from to first spring 12 is on the lateral wall of flexible groove 11, be equipped with slope terminal surface 16 on the movable voussoir 10, extrusion piece 14 bottom side symmetry be equipped with slope terminal surface 16 assorted inclined plane, still can make the inclined plane on the extrusion piece 14 and the slope terminal surface 16 on the movable voussoir 10 extrude each other when clamping ring 17 pushes down extrusion piece 14, make movable voussoir 10 slide, then first spring 12 begins the compression, the elasticity that produces through first spring 12 and the compression of second spring 13 is cushioned, prevent that clamping ring 17 directly extrud.
Threaded connection has a plurality of bolts 6 on the clamping ring 17, the one end of every bolt 6 extends to in the high-pressure inner casing 2, set up on the high-pressure inner casing 2 with bolt 6 assorted screw hole 5, bolt 6 extends to the one end threaded connection in the high-pressure inner casing 2 in screw hole 5, all the cover is equipped with flat pad 7 on every bolt 6, bullet pad 8, flat pad 7, bullet pad 8 is located between clamping ring 17 and the bolt 6, flat pad 7 is located under bullet pad 8, increase the area of contact between bolt 6 and the clamping ring 17 through flat pad 7, decentralized pressure, prevent that clamping ring 17 from being crushed, and bullet pad 8 receives the back that compresses tightly, can give 6 elasticity of bolt, support tight bolt 6, increase bolt 6's frictional force, prevent that it from droing.
In the invention, when a user uses the device, when the bolt 6 is screwed into the threaded hole 5, the press ring 17 presses the extrusion block 14 downwards, so that the extrusion block 14 moves downwards to drive the second spring 13 to compress, meanwhile, the inclined plane on the extrusion block 14 presses the inclined plane end surface 16 on the movable wedge block 10 to enable the movable wedge block 10 to slide, then the first spring 12 starts to compress, the elastic force generated by the compression of the first spring 12 and the second spring 13 is used for buffering to prevent the press ring 17 from directly extruding the sealing ring, the extrusion force penetrates through the sleeve plate 9 and the annular rubber pad 15 and then indirectly acts on the sealing ring, meanwhile, the elastic action of the annular rubber pad 15 further can prevent the sealing ring from being extruded and deformed, the flat pad 7 and the elastic pad 8 between the bolt 6 and the press ring 17 can be gradually clamped in the process of gradually screwing and pressing, the contact area between the bolt 6 and the press ring 17 is increased through the flat pad, pressure is dispersed, the press ring 17 is prevented from being crushed, and the elastic pad 8 can give an elastic force to the bolt 6 after being compressed, abuts against the bolt 6, the friction force of the bolt 6 is increased, and the bolt is prevented from falling off.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (5)
1. The laminated sealing device for the high-pressure steam inlet insertion pipe of the steam turbine comprises a steam inlet insertion pipe (1) and a high-pressure inner cylinder (2), wherein a plurality of outer sealing rings (3) and a plurality of inner sealing rings (4) are sleeved on the outer side of the steam inlet insertion pipe (1) and are arranged at intervals, and is characterized in that a sleeve plate (9) and a pressing ring (17) are further sleeved on the steam inlet insertion pipe (1), the sleeve plate (9) is located between the pressing ring (17) and the high-pressure inner cylinder (2), an annular rubber gasket (15) is fixedly connected to the bottom side of the sleeve plate (9), telescopic grooves (11) are symmetrically formed in the sleeve plate (9), elastic mechanisms are arranged in the telescopic grooves (11), the sleeve plate (9) is connected with an extrusion block (14) through the elastic mechanisms, sliding devices are symmetrically arranged in the telescopic grooves (11), and a plurality of bolts (6) are connected to the pressing ring (17) through threads, one end of each bolt (6) extends into the high-pressure inner cylinder (2); the sliding device comprises a movable wedge block (10), the movable wedge block (10) is connected to the bottom wall of the telescopic groove (11) in a sliding mode, a first spring (12) is fixedly connected to one side of the movable wedge block (10), and one end, far away from the movable wedge block (10), of the first spring (12) is fixedly connected to the side wall of the telescopic groove (11).
2. The steam turbine high-pressure steam inlet pipe laminated sealing device according to claim 1, wherein the elastic mechanism comprises a plurality of second springs (13), one end of each second spring (13) is fixedly connected to the bottom wall of the telescopic slot (11), and the other end of each second spring (13) is fixedly connected to the bottom side of the extrusion block (14).
3. The laminated sealing device for the high-pressure steam inlet pipe of the steam turbine according to claim 1, wherein each bolt (6) is sleeved with a flat gasket (7) and an elastic gasket (8), the flat gasket (7) and the elastic gasket (8) are positioned between the pressure ring (17) and the bolt (6), and the flat gasket (7) is positioned under the elastic gasket (8).
4. The steam turbine high-pressure steam inlet insertion pipe laminated sealing device according to claim 1, characterized in that the high-pressure inner cylinder (2) is provided with a threaded hole (5) matched with the bolt (6), and one end of the bolt (6) extending into the high-pressure inner cylinder (2) is connected in the threaded hole (5) in a threaded manner.
5. The laminated sealing device for the high-pressure steam inlet insertion pipe of the steam turbine according to claim 1, wherein the movable wedge block (10) is provided with a slope end surface (16), and the bottom side of the extrusion block (14) is symmetrically provided with inclined surfaces matched with the slope end surface (16).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811274662.2A CN109519227B (en) | 2018-10-30 | 2018-10-30 | Laminated sealing device for high-pressure steam inlet insertion pipe of steam turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811274662.2A CN109519227B (en) | 2018-10-30 | 2018-10-30 | Laminated sealing device for high-pressure steam inlet insertion pipe of steam turbine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109519227A CN109519227A (en) | 2019-03-26 |
| CN109519227B true CN109519227B (en) | 2021-03-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811274662.2A Active CN109519227B (en) | 2018-10-30 | 2018-10-30 | Laminated sealing device for high-pressure steam inlet insertion pipe of steam turbine |
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| CN (1) | CN109519227B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110966050B (en) * | 2019-12-20 | 2022-05-10 | 东方电气集团东方汽轮机有限公司 | Steam turbine steam inlet insertion pipe sealing connection structure |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58192904A (en) * | 1982-05-06 | 1983-11-10 | Fuji Electric Co Ltd | Saw-tooth shaped thread |
| JPS6093102A (en) * | 1983-10-28 | 1985-05-24 | Hitachi Ltd | Spring type locking ring |
| JPS6238805A (en) * | 1985-08-10 | 1987-02-19 | Fuji Electric Co Ltd | Structure of casing for steam turbine |
| CN1407210A (en) * | 2001-09-10 | 2003-04-02 | 三菱重工业株式会社 | Coolant channel joint structure and pipe sealing of gas turbine and gas turbine |
| CN201487206U (en) * | 2009-08-24 | 2010-05-26 | 杨彦夫 | Sealing device on speed reducer |
| CN203559931U (en) * | 2013-10-17 | 2014-04-23 | 浙江浙能北仑发电有限公司 | High-pressure and air admission sealing structure |
| CN205349430U (en) * | 2016-02-26 | 2016-06-29 | 哈尔滨汽轮机厂有限责任公司 | Novel elastic sealing structure of steam turbine intubate |
| CN105805319A (en) * | 2015-01-13 | 2016-07-27 | 通用电气公司 | Seal ring for hydrogen cooled generator |
| CN207093148U (en) * | 2017-08-25 | 2018-03-13 | 中国长江动力集团有限公司 | Inlet sleeve sealing device and turbine high-pressure sealing system |
-
2018
- 2018-10-30 CN CN201811274662.2A patent/CN109519227B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58192904A (en) * | 1982-05-06 | 1983-11-10 | Fuji Electric Co Ltd | Saw-tooth shaped thread |
| JPS6093102A (en) * | 1983-10-28 | 1985-05-24 | Hitachi Ltd | Spring type locking ring |
| JPS6238805A (en) * | 1985-08-10 | 1987-02-19 | Fuji Electric Co Ltd | Structure of casing for steam turbine |
| CN1407210A (en) * | 2001-09-10 | 2003-04-02 | 三菱重工业株式会社 | Coolant channel joint structure and pipe sealing of gas turbine and gas turbine |
| CN201487206U (en) * | 2009-08-24 | 2010-05-26 | 杨彦夫 | Sealing device on speed reducer |
| CN203559931U (en) * | 2013-10-17 | 2014-04-23 | 浙江浙能北仑发电有限公司 | High-pressure and air admission sealing structure |
| CN105805319A (en) * | 2015-01-13 | 2016-07-27 | 通用电气公司 | Seal ring for hydrogen cooled generator |
| CN205349430U (en) * | 2016-02-26 | 2016-06-29 | 哈尔滨汽轮机厂有限责任公司 | Novel elastic sealing structure of steam turbine intubate |
| CN207093148U (en) * | 2017-08-25 | 2018-03-13 | 中国长江动力集团有限公司 | Inlet sleeve sealing device and turbine high-pressure sealing system |
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| CN109519227A (en) | 2019-03-26 |
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