CN105604613A - Novel elastic seal structure for steam turbine insertion tube - Google Patents
Novel elastic seal structure for steam turbine insertion tube Download PDFInfo
- Publication number
- CN105604613A CN105604613A CN201610108116.6A CN201610108116A CN105604613A CN 105604613 A CN105604613 A CN 105604613A CN 201610108116 A CN201610108116 A CN 201610108116A CN 105604613 A CN105604613 A CN 105604613A
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- CN
- China
- Prior art keywords
- seal ring
- intubate
- ring
- steam turbine
- sealing ring
- Prior art date
- 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
-
- 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
- F01D11/005—Sealing means between non relatively rotating elements
Abstract
The invention discloses a novel elastic seal structure for a steam turbine insertion tube, and relates to a seal structure. The problems that an existing seal structure for an insertion tube is poor in sealing property, the steam admission and exhaustion rate of the insertion tube is low, and the unit efficiency is low are solved. The novel elastic seal structure comprises an outer cylinder, an inner cylinder, the insertion tube, a compression ring, multiple outer seal washers, multiple inner seal washers, multiple outer elastic seal rings and multiple inner elastic seal rings; the insertion tube is installed in the inner cylinder in an inserted mode, the upper end of the insertion tube is welded to the outer cylinder, the outer seal washers and the inner seal washers are arranged in a tube hole formed between the inner cylinder and the insertion tube in an alternately stacked mode from bottom to top, each outer seal washer is internally provided with one outer elastic seal ring, the inner seal washers and the outer elastic seal rings lean against the inner side face of the inner cylinder in the tube hole, each inner seal washer is provided with one inner elastic seal ring, the inner seal washers and the inner elastic seal rings lean against the peripheral face of the insertion tube, the compression ring penetrates through the insertion tube, presses on the seal washer on the uppermost layer and is connected with the inner cylinder through bolts. The novel elastic seal structure for the steam turbine insertion tube is used for seal of the steam turbine insertion tube.
Description
Technical field
The present invention relates to a kind of hermetically-sealed construction, be specifically related to steam turbine intubate novel elastic hermetically-sealed construction.
Background technology
Existing steam turbine intubate mostly is piston ring seal structure, or bell bell-type hermetically-sealed construction, or stacked sealingStructure. Three cannot avoid the steam loss of intubate, ensures the admission efficiency of intubate, ensures cylinder effect.
Summary of the invention
The present invention is for solving the low and unit of the existing steam turbine intubate hermetically-sealed construction sealing efficiency of entering to draw gas poor, intubate effectThe problem that rate is low, and then a kind of steam turbine intubate novel elastic hermetically-sealed construction is provided.
The present invention addresses the above problem the technical scheme of taking to be: steam turbine intubate novel elastic hermetically-sealed construction bag of the present inventionDraw together outer shell, inner casing, intubate, pressure ring, multiple exterior seal ring, multiple inner seal ring, multiple outer elastic sealing ring and multiple inElastic sealing ring;
The internal placement of outer shell has inner casing, and intubate is inserted in inner casing, the distance between the lower surface of intubate and pore inner bottom surfaceFor 10mm-20mm, the upper end of intubate and outer shell welding, be stacked alternately and be furnished with from the bottom to top in the pore between inner casing and intubateMultiple exterior seal rings and multiple inner seal ring, be provided with outer elastic sealing ring in each exterior seal ring, exterior seal ring and outer elasticityThe recline medial surface of the inner casing in pore of sealing ring, is provided with interior elastic sealing ring in each inner seal ring, inner seal ring and inThe recline outer peripheral face of steam turbine intubate of elastic sealing ring, pressure ring is through intubate and be pressed on the sealing ring of the superiors and use with inner casingBolt connects.
The present invention compared with prior art has following effect: the present invention relies in the radial load and axial force compression of pressure reduction generationExterior seal ring; And in the time of operating temperature, because interior elastic sealing ring and the different linear expansion coefficient of inner seal ring can banding intubate,Outer elastic sealing ring and exterior seal ring push against inner casing, reduce the steam leakage of original structure. Hermetically-sealed construction of the present invention can reduce intubateSteam loss, improve admission, the efficiency of drawing gas of intubate, improve cylinder effect and unit efficiency, the consumption of saving primary energy, carriesThe benefit of high power plant. Hermetically-sealed construction of the present invention is installed simple, and security performance is high, can ensure unit safety operation.
Brief description of the drawings
Fig. 1 is the main cutaway view of steam turbine intubate novel elastic hermetically-sealed construction of the present invention.
Detailed description of the invention
Detailed description of the invention one: in conjunction with Fig. 1 explanation, the steam turbine intubate novel elastic hermetically-sealed construction of present embodiment, its bagDraw together outer shell 1, inner casing 2, intubate 9, pressure ring 4, multiple exterior seal ring 5, multiple inner seal ring 6, multiple outer elastic sealing ring7 and multiple interior elastic sealing ring 8;
The internal placement of outer shell 1 has inner casing 2, and intubate 9 is inserted in inner casing 2, the lower surface of intubate 9 and pore inner bottom surfaceDistance is 10mm-20mm, and the upper end of intubate 9 and outer shell 1 weld, and in the pore between inner casing 2 and intubate 9, hands over from the bottom to topBe furnished with multiple exterior seal rings 5 and multiple inner seal ring 6 for stacking, in each exterior seal ring 5, be provided with outer elastic sealing ring 7,The recline medial surface of the inner casing 2 in pore of exterior seal ring 5 and outer elastic sealing ring 7, in being provided with in each inner seal ring 6Elastic sealing ring 8, the recline outer peripheral face of intubate 9 of inner seal ring 6 and interior elastic sealing ring 8, pressure ring 4 is through intubate 9 and pressOn the sealing ring of the superiors and with inner casing 2 use bolts 10, be connected.
The pressure ring 4 of present embodiment is fixed on inner casing by bolt 10. The interior elastic sealing ring of present embodiment and outer elasticitySealing ring is the sealing ring that non-whole circle is arranged. The inner seal ring of present embodiment is identical with the thickness of exterior seal ring or not identical.Present embodiment is convenient for changing intubate, and inlet sleeve adopts the hermetically-sealed construction with resilient sealing ring sealing circle. Exterior seal ring is dryAfter ice-cooled, pack inner casing into, intubate also packs interior elastic sealing ring and inner seal ring into after dry ice is cooling, and adjusts inside and outside closeSeal and inside and outside elastic sealing ring obtain suitable fit-up gap, fill in glassine and prevent between inner seal ring and exterior seal ringBite. When work, rely on radial load and the axial force that pressure reduction produces to compress interior exterior seal ring; And in the time of operating temperature, due toThe different linear expansion coefficient of interior elastic sealing ring and inner seal ring can banding intubate, and outer elastic sealing ring and exterior seal ring push against inner casing,Reduce the steam leakage of original structure. Distance between the lower surface of intubate 9 and pore inner bottom surface is 10mm-20mm, refers to intubate9 lower surface to the inner casing bottom surface distance in pore is 10mm-20mm. Be during for hot operation, prevent that inner casing from expanding, rightSteam turbine intubate produces stress, damaged steam turbine intubate.
Detailed description of the invention two: in conjunction with Fig. 1 explanation, inner seal ring 6 and the exterior seal ring 5 of present embodiment are 12Cr notRust steel sealing ring. So arrange, good toughness, antiseptic property is good, and load can withstand shocks. Other and detailed description of the invention oneIdentical.
Detailed description of the invention three: in conjunction with Fig. 1 explanation, the interior elastic sealing ring 8 of present embodiment and outer elastic sealing ring 7 areNickel-base alloy sealing ring. So arrange, there is ability all kinds abrasion and corrosion and resistance to elevated temperatures, this nickel-base alloyContain chromium, cobalt and W elements. Other is identical with detailed description of the invention one or two.
Detailed description of the invention four: in conjunction with Fig. 1 explanation, the quantity of the exterior seal ring 5 of present embodiment is 3, inner seal ring 6Quantity be 3. So arrange, meet the design requirements and the actual needs. Other is identical with detailed description of the invention three.
Detailed description of the invention five: in conjunction with Fig. 1 explanation, the orlop sealing ring of present embodiment is exterior seal ring 5, and the superiors are closeSeal is inner seal ring 6. So arrange, meet actual multi-layer sealed needs. Other is identical with detailed description of the invention four.
Detailed description of the invention six: in conjunction with Fig. 1 explanation, the quantity of the exterior seal ring 5 of present embodiment is 4, inner seal ring 6Quantity be 3. So arrange, meet the design requirements and the actual needs. Other is identical with detailed description of the invention three.
Detailed description of the invention seven: the orlop sealing ring of present embodiment is exterior seal ring 5, the superiors' sealing ring is exterior seal ring5. So arrange, meet actual multi-layer sealed needs. Other is identical with detailed description of the invention six.
Detailed description of the invention eight: in conjunction with Fig. 1 explanation, the thickness of the inner seal ring 6 of present embodiment is 8mm-12mm, outer closeThe thickness of seal 5 is 8mm-12mm. So arrange, meet the needs of the inside and outside double containment of steam turbine intubate. In present embodimentThe preferred 10mm of sealing ring and exterior seal ring. Other is identical with detailed description of the invention one, two, four, five, six or seven.
Detailed description of the invention nine: in conjunction with Fig. 1 explanation, stacked two interior elasticity in each inner seal ring 6 of present embodimentSealing ring 8, the thickness of each interior elastic sealing ring 8 is 1mm-3mm. So arrange, meet the inside and outside double containment of steam turbine intubateNeeds, the preferred 2mm of thickness of elastic sealing ring in present embodiment. Other is identical with detailed description of the invention eight.
Detailed description of the invention ten: in conjunction with Fig. 1 explanation, stacked two outer elasticity in each exterior seal ring 5 of present embodimentSealing ring 7, the thickness of each outer elastic sealing ring 7 is 1mm-3mm. So arrange, meet the inside and outside double containment of steam turbine intubateNeeds. The preferred 2mm of thickness of the outer elastic sealing ring of present embodiment. Other is identical with detailed description of the invention nine.
The course of work
The outer elastic sealing ring 7 of assembling and exterior seal ring 5 and interior elastic sealing ring 8 and inner seal ring 6, pack dry ice successively into respectivelyCooled exterior seal ring 5 and outer elastic sealing ring 7 and inner seal ring 6 and interior elastic sealing ring 8, install the sealing of the superiorsAfter ring and sealing ring, the superiors' sealing ring presses with pressure ring 4, and pressure ring 4 use bolts 10 are fixed on inner casing 2, finally pack intoThe cooled intubate 9 of dry ice. Intubate 9 is Welding Structure with outer shell 1.
Claims (10)
1. steam turbine intubate novel elastic hermetically-sealed construction, is characterized in that: it comprise outer shell (1), inner casing (2), intubate (9),Pressure ring (4), multiple exterior seal ring (5), multiple inner seal ring (6), multiple outer elastic sealing ring (7) and multiple interior elasticity are closeSeal ring (8);
The internal placement of outer shell (1) has inner casing (2), and intubate (9) is inserted in inner casing (2), the lower surface of intubate (9)And the distance between pore inner bottom surface is 10mm-20mm, the upper end of intubate (9) and outer shell (1) welding, inner casing (2) is with slottingIn pore between pipe (9), be stacked alternately from the bottom to top and be furnished with multiple exterior seal rings (5) and multiple inner seal ring (6), everyIn individual exterior seal ring (5), be provided with outer elastic sealing ring (7), exterior seal ring (5) and outer elastic sealing ring (7) pore that reclinesIn the medial surface of inner casing (2), in each inner seal ring (6), be provided with interior elastic sealing ring (8), inner seal ring (6) andThe recline outer peripheral face of intubate (9) of interior elastic sealing ring (8), pressure ring (4) is through intubate (9) and be pressed in the sealing of the superiorsOn circle and with inner casing (2), be connected with bolt (10).
2. steam turbine intubate novel elastic hermetically-sealed construction according to claim 1, is characterized in that: inner seal ring (6)And exterior seal ring (5) is 12Cr stainless steel sealing ring.
3. steam turbine intubate novel elastic hermetically-sealed construction according to claim 1 and 2, is characterized in that: interior elastic packingRing (8) and outer elastic sealing ring (7) are nickel-base alloy sealing ring.
4. steam turbine intubate novel elastic hermetically-sealed construction according to claim 3, is characterized in that: exterior seal ring (5)Quantity be 3, the quantity of inner seal ring (6) is 3.
5. steam turbine intubate novel elastic hermetically-sealed construction according to claim 4, is characterized in that: orlop sealing ring isExterior seal ring (5), the superiors' sealing ring is inner seal ring (6).
6. steam turbine intubate novel elastic hermetically-sealed construction according to claim 3, is characterized in that: exterior seal ring (5)Quantity be 4, the quantity of inner seal ring (6) is 3.
7. steam turbine intubate novel elastic hermetically-sealed construction according to claim 6, is characterized in that: orlop sealing ring isExterior seal ring (5), the superiors' sealing ring is exterior seal ring (5).
8. the steam turbine intubate novel elastic hermetically-sealed construction described in a claim 1,2,4,5,6 or 7, is characterized in that:The thickness of inner seal ring (6) is 8mm-12mm, and the thickness of exterior seal ring (5) is 8mm-12mm.
9. steam turbine intubate novel elastic hermetically-sealed construction according to claim 8, is characterized in that: each inner seal ring (6)Inside stacked two interior elastic sealing rings (8), the thickness of each interior elastic sealing ring (8) is 1mm-3mm.
10. steam turbine intubate novel elastic hermetically-sealed construction according to claim 9, is characterized in that: each exterior seal ring(5) in, stacked two outer elastic sealing rings (7), the thickness of each outer elastic sealing ring (7) is 1mm-3mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610108116.6A CN105604613A (en) | 2016-02-26 | 2016-02-26 | Novel elastic seal structure for steam turbine insertion tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610108116.6A CN105604613A (en) | 2016-02-26 | 2016-02-26 | Novel elastic seal structure for steam turbine insertion tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105604613A true CN105604613A (en) | 2016-05-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610108116.6A Pending CN105604613A (en) | 2016-02-26 | 2016-02-26 | Novel elastic seal structure for steam turbine insertion tube |
Country Status (1)
| Country | Link |
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| CN (1) | CN105604613A (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 (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1114018A (en) * | 1994-05-24 | 1995-12-27 | 杜长春 | Static balance combined high pressure rotary shaft oil seal |
| CN202280479U (en) * | 2011-10-27 | 2012-06-20 | 哈尔滨汽轮机厂有限责任公司 | Lamination-type seal device of steam turbine high-pressure gas injection insertion pipe |
| CN103267129A (en) * | 2013-05-12 | 2013-08-28 | 浙江长城减速机有限公司 | Split type mechanical sealing part of elastic sealing ring with rectangular cross section |
| 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 |
-
2016
- 2016-02-26 CN CN201610108116.6A patent/CN105604613A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1114018A (en) * | 1994-05-24 | 1995-12-27 | 杜长春 | Static balance combined high pressure rotary shaft oil seal |
| CN202280479U (en) * | 2011-10-27 | 2012-06-20 | 哈尔滨汽轮机厂有限责任公司 | Lamination-type seal device of steam turbine high-pressure gas injection insertion pipe |
| CN103267129A (en) * | 2013-05-12 | 2013-08-28 | 浙江长城减速机有限公司 | Split type mechanical sealing part of elastic sealing ring with rectangular cross section |
| 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 |
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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| C06 | Publication | ||
| PB01 | Publication | ||
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160525 |
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| WD01 | Invention patent application deemed withdrawn after publication |