CN109519227A - A kind of lamination-type seal device of steam turbine high-pressure gas injection insertion pipe - Google Patents
A kind of lamination-type seal device of steam turbine high-pressure gas injection insertion pipe Download PDFInfo
- Publication number
- CN109519227A CN109519227A CN201811274662.2A CN201811274662A CN109519227A CN 109519227 A CN109519227 A CN 109519227A CN 201811274662 A CN201811274662 A CN 201811274662A CN 109519227 A CN109519227 A CN 109519227A
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- China
- Prior art keywords
- pressure
- ring
- cage plate
- spring
- bolt
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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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
Abstract
The invention discloses a kind of lamination-type seal device of steam turbine high-pressure gas injection insertion pipe, including inlet sleeve and high-pressure inner cylinder, the inlet sleeve outer sheath is equipped with multiple outer seal rings and multiple inner seal rings, multiple outer seal rings and multiple inner seal ring intervals are arranged, cage plate and pressure ring are further sleeved on the inlet sleeve, the cage plate is between pressure ring and high-pressure inner cylinder, the cage plate bottom side is fixedly connected with ring-shaped rubber pad, telescopic chute is symmetrically offered on the cage plate, elastic mechanism is equipped in the telescopic chute, the cage plate is connected with crushing block by elastic mechanism.The present invention is when pressure ring pushes crushing block, so that crushing block moves down, drive second spring compression, slope end face on inclined-plane and movable wedge on crushing block simultaneously, so that movable wedge is slided, then the first spring starts to compress, and is buffered by the elastic force that the first spring and second spring compression generate, prevents pressure ring from directly squeezing sealing ring.
Description
Technical field
The present invention relates to turbine high-pressure inlet sleeve technical field more particularly to a kind of turbine high-pressure inlet sleeve are folded
Strip type seals.
Background technique
Steam turbine is also referred to as steam turbine engine, is a kind of rotary steam power device, and high temperature and high pressure steam passes through solid
Nozzle is determined as being ejected on blade after the air-flow accelerated, makes the rotor rotation equipped with blade row, while external work done.Steam turbine
It is the capital equipment of modern thermal power plant, is also used for metallurgical industry, chemical industry, in ship's powerplant.
According to Chinese patent Patent No.: CN202280479U, a kind of stacked sealing dress of turbine high-pressure inlet sleeve
It sets including pressure ring, multiple outer seal rings and multiple inner seal rings, multiple inner seal rings and multiple outer seal rings are sleeved on into vapour
The outside of intubation, multiple outer seal rings and multiple inner seal ring intervals are arranged, and multiple inner seal rings and inner casing are between vapour annular groove
There are radial clearance, there are radial clearance between multiple outer seal rings and inlet sleeve, the device by multiple outer seal rings and
Multiple inner seal ring intervals composition, inner seal ring match when being assemblied in free state with inlet sleeve, outer seal ring with into vapour
There are radial clearance between intubation, outer seal ring and inner seal ring lap seal, to reduce the axial interannular leakage of steam, when work
By radial force and axial force that pressure difference generates, make inner seal ring and inlet sleeve, outer seal ring and inner casing into vapour annular groove end face
It is adjacent to, inner seal ring and outer seal ring are respectively formed sealing surface, and sealing is also formed between inner seal ring and the end face of outer seal ring
Face reaches preferable sealing effect.
Pressure ring is fixedly connected on high-pressure inner cylinder by the device using bolt, facilitates the detachable maintaining in later period, but only
Compression is only fixed by bolt so that pressure ring is directly pressed on sealing ring, if the tension that bolt is stubborn, what moment generated is squeezed
Pressure is squeezed and deformed pressure ring by sealing ring, to influence the sealing effect of sealing ring.
Summary of the invention
The purpose of the present invention is to solve disadvantages existing in the prior art, such as: the device is carried out only by bolt
It is fixed and clamped so that pressure ring is directly pressed on sealing ring, if the tension that bolt is stubborn, the extruding force that moment generates makes pressure ring will
Sealing ring is squeezed and deformed, to influence the sealing effect of sealing ring.
To achieve the goals above, present invention employs following technical solutions: a kind of turbine high-pressure of the invention is into vapour
It is intubated stacked sealing device, including inlet sleeve and high-pressure inner cylinder, the inlet sleeve outer sheath is equipped with multiple outer seal rings
With multiple inner seal rings, multiple outer seal rings and multiple inner seal ring intervals are arranged, and are further sleeved on the inlet sleeve
Cage plate and pressure ring, the cage plate is between pressure ring and high-pressure inner cylinder, and the cage plate bottom side is fixedly connected with ring-shaped rubber pad, institute
It states and symmetrically offers telescopic chute on cage plate, elastic mechanism is equipped in the telescopic chute, the cage plate is connected with by elastic mechanism
Crushing block is symmetrically arranged with carriage in the telescopic chute, multiple bolts, each bolt is threaded on the pressure ring
One end extend in high-pressure inner cylinder；The carriage includes movable wedge, and the movable wedge is slidably connected at telescopic chute
Bottom wall on, the side of the movable wedge is fixedly connected with the first spring, the described one end of first spring far from movable wedge
It is fixedly connected on the side wall of telescopic chute.
Preferably, the elastic mechanism includes multiple second springs, and one end of each second spring is fixedly connected with
On the bottom wall of telescopic chute, the other end of each second spring is fixedly connected on the bottom side of crushing block.
Preferably, be arranged with plain cushion, spring washer on each bolt, the plain cushion, spring washer be located at pressure ring and bolt it
Between, the plain cushion is located at immediately below spring washer.
Preferably, the threaded hole to match with bolt is offered on the high-pressure inner cylinder, the bolt extends in high pressure
Threaded one end in cylinder is connected in threaded hole.
Preferably, the movable wedge is equipped with slope end face, and the crushing block bottom side is symmetrically arranged with and slope end face phase
Matched inclined-plane.
Compared with prior art, the beneficial effects of the present invention are:
1, when bolt precession threaded hole, so that pressure ring pushes crushing block, so that crushing block moves down, the second bullet is driven
Spring compression, while the slope end face mutual extrusion on the inclined-plane and movable wedge on crushing block, so that movable wedge is slided, then
First spring starts to compress, and is buffered by the elastic force that the first spring and second spring compression generate, prevents pressure ring from directly squeezing
Junk ring, extruding force is through after cage plate and ring-shaped rubber pad again in indirectly-acting to sealing ring, while the bullet of ring-shaped rubber pad
Property effect, can further sealing ring be prevented to be deformed；
2, bolt can gradually clamp the plain cushion and spring washe between pressure ring, be increased by plain cushion during gradually tightening pushing
Add the contact area between bolt and pressure ring, disperses pressure, pressure ring is prevented to be subject to crushing, and after spring washer is compressed, spiral shell can be given
One elastic force of bolt pushes against bolt, increases the frictional force of bolt, prevent it from falling off.
Detailed description of the invention
Fig. 1 is a kind of Facad structure signal of lamination-type seal device of steam turbine high-pressure gas injection insertion pipe proposed by the present invention
Figure；
Fig. 2 is the enlarged diagram in Fig. 1 at A.
In figure: 1 inlet sleeve, 2 high-pressure inner cylinders, 3 outer seal rings, 4 inner seal rings, 5 threaded holes, 6 bolts, 7 plain cushions, 8 bullets
Pad, 9 cage plates, 10 movable wedges, 11 telescopic chutes, 12 first springs, 13 second springs, 14 crushing blocks, 15 ring-shaped rubber pads, 16 are tiltedly
Slope end face, 17 pressure rings.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.
In the description of the present invention, it is to be understood that, term " on ", "lower", "front", "rear", "left", "right",
The orientation or positional relationship of the instructions such as "top", "bottom", "inner", "outside" is to be based on the orientation or positional relationship shown in the drawings, and is only
For the convenience of describing the present invention and simplifying the description, rather than the device or element of indication or suggestion meaning must have specific side
Position is constructed and operated in a specific orientation, therefore is not considered as limiting the invention.
As shown in Figs. 1-2, a kind of lamination-type seal device of steam turbine high-pressure gas injection insertion pipe of the invention, including inlet sleeve
1 and high-pressure inner cylinder 2,1 outer sheath of inlet sleeve is equipped with multiple outer seal rings 3 and multiple inner seal rings 4, multiple outer seal rings 3 with
Multiple intervals of inner seal ring 4 are arranged, and are further sleeved with cage plate 9 and pressure ring 17 on inlet sleeve 1, cage plate 9 is located at pressure ring 17 and high pressure
Between inner casing 2,9 bottom side of cage plate is fixedly connected with ring-shaped rubber pad 15, and telescopic chute 11, telescopic chute 11 are symmetrically offered on cage plate 9
Interior to be equipped with elastic mechanism, elastic mechanism includes multiple second springs 13, and one end of each second spring 13, which is fixedly connected with, is stretching
On the bottom wall of contracting slot 11, the other end of each second spring 13 is fixedly connected on the bottom side of crushing block 14, and pressure ring 17 pushes
Crushing block 14 drives second spring 13 to compress so that crushing block 14 moves down, so that the compression of second spring 13 generates bullet
Power.
Cage plate 9 is connected with crushing block 14 by elastic mechanism, and carriage, carriage packet are symmetrically arranged in telescopic chute 11
Movable wedge 10 is included, movable wedge 10 is slidably connected on the bottom wall of telescopic chute 11, and the side of movable wedge 10 is fixedly connected with
First spring 12, the first spring 12 are fixedly connected on the side wall of telescopic chute 11 far from one end of movable wedge 10, movable wedge
10 are equipped with slope end face 16, and 14 bottom side of crushing block is symmetrically arranged with the inclined-plane to match with slope end face 16, when pressure ring 17 pushes
Crushing block 14 can also make the inclined-plane on crushing block 14 and 16 mutual extrusion of slope end face in movable wedge 10, so that movable wedge
Block 10 slides, and then the first spring 12 starts to compress, and is carried out by the elastic force that the first spring 12 and the compression of second spring 13 generate
Buffering prevents pressure ring 17 from directly squeezing sealing ring.
Multiple bolts 6 are threaded on pressure ring 17, one end of each bolt 6 extends in high-pressure inner cylinder 2, high-pressure inner cylinder
The threaded hole 5 to match with bolt 6 is offered on 2, the threaded one end that bolt 6 extends in high-pressure inner cylinder 2 is connected to threaded hole 5
It is interior, plain cushion 7, spring washer 8 are arranged on each bolt 6, between pressure ring 17 and bolt 6, plain cushion 7 is located at for plain cushion 7, spring washer 8
Immediately below spring washer 8, the contact area between bolt 6 and pressure ring 17 is increased by plain cushion 7, disperses pressure, prevents pressure ring 17 from being pressed
It is bad, and after spring washer 8 is compressed, 6 one elastic force of bolt can be given, bolt 6 is pushed against, increase the frictional force of bolt 6, prevent it de-
It falls.
In the present invention, when user uses the device, when 6 precession threaded hole 5 of bolt, so that pressure ring 17 pushes crushing block
14, so that crushing block 14 moves down, drive second spring 13 to compress, while the inclined-plane Compressive activities wedge on crushing block 14
Slope end face 16 on block 10, so that movable wedge 10 is slided, then the first spring 12 starts to compress, and passes through 12 He of the first spring
The elastic force that the compression of second spring 13 generates is buffered, and prevents pressure ring 17 from directly squeezing sealing ring, and extruding force penetrates cage plate 9 and ring
After shape rubber pad 15 again in indirectly-acting to sealing ring, while the elastic reaction of ring-shaped rubber pad 15, it can further prevent
Sealing ring is deformed, bolt 6 during gradually tightening pushing, can gradually clamp and pressure ring 17 between plain cushion 7 and
Spring washer 8 increases the contact area between bolt 6 and pressure ring 17 by plain cushion 7, disperses pressure, pressure ring 17 is prevented to be subject to crushing, and bullet
After pad 8 is compressed, 6 one elastic force of bolt can be given, push against bolt 6, increases the frictional force of bolt 6, prevents it from falling off.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Anyone skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its
Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (5)
1. a kind of lamination-type seal device of steam turbine high-pressure gas injection insertion pipe, including inlet sleeve (1) and high-pressure inner cylinder (2), special
Sign is that inlet sleeve (1) outer sheath is equipped with multiple outer seal rings (3) and multiple inner seal rings (4), multiple described outer close
Seal ring (3) and multiple inner seal rings (4) interval are arranged, and are further sleeved with cage plate (9) and pressure ring (17) on the inlet sleeve (1),
The cage plate (9) is located between pressure ring (17) and high-pressure inner cylinder (2), and cage plate (9) bottom side is fixedly connected with ring-shaped rubber pad
(15), it is symmetrically offered telescopic chute (11) on the cage plate (9), elastic mechanism, the cage plate is equipped in the telescopic chute (11)
(9) it is connected with crushing block (14) by elastic mechanism, is symmetrically arranged with carriage, the pressure ring (17) in the telescopic chute (11)
On be threaded with multiple bolts (6), one end of each bolt (6) extends in high-pressure inner cylinder (2)；The carriage
Including movable wedge (10), the movable wedge (10) is slidably connected on the bottom wall of telescopic chute (11), the movable wedge
(10) side is fixedly connected with the first spring (12), and the one end of first spring (12) far from movable wedge (10) is fixed to be connected
It connects on the side wall of telescopic chute (11).
2. a kind of lamination-type seal device of steam turbine high-pressure gas injection insertion pipe according to claim 1, which is characterized in that described
Elastic mechanism includes multiple second springs (13), and one end of each second spring (13) is fixedly connected in telescopic chute (11)
Bottom wall on, the other end of each second spring (13) is fixedly connected on the bottom side of crushing block (14).
3. a kind of lamination-type seal device of steam turbine high-pressure gas injection insertion pipe according to claim 1, which is characterized in that each
Plain cushion (7), spring washer (8) are arranged on the bolt (6), the plain cushion (7), spring washer (8) are located at pressure ring (17) and bolt (6)
Between, the plain cushion (7) is located at immediately below spring washer (8).
4. a kind of lamination-type seal device of steam turbine high-pressure gas injection insertion pipe according to claim 1, which is characterized in that described
The threaded hole (5) to match with bolt (6) is offered on high-pressure inner cylinder (2), the bolt (6) extends in high-pressure inner cylinder (2)
Threaded one end be connected in threaded hole (5).
5. a kind of lamination-type seal device of steam turbine high-pressure gas injection insertion pipe according to claim 1, which is characterized in that described
Movable wedge (10) is equipped with slope end face (16), and crushing block (14) bottom side is symmetrically arranged with to match with slope end face (16)
Inclined-plane.
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 true CN109519227A (en) | 2019-03-26 |
| CN109519227B CN109519227B (en) | 2021-03-19 |
Family
ID=65774088
Family Applications (1)
| 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 |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109519227B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110966050A (en) * | 2019-12-20 | 2020-04-07 | 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)
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|---|---|---|---|---|
| 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 |
Non-Patent Citations (3)
| Title |
|---|
| 付丽莉等: "大型汽轮机进汽插管密封型式", 《汽轮机技术》 * |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110966050A (en) * | 2019-12-20 | 2020-04-07 | 东方电气集团东方汽轮机有限公司 | Steam turbine steam inlet insertion pipe sealing connection structure |
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| Publication number | Publication date |
|---|---|
| CN109519227B (en) | 2021-03-19 |
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