CN105545373A - High-back-pressure turbine end vapor seal capable of being rapidly detached - Google Patents
High-back-pressure turbine end vapor seal capable of being rapidly detached Download PDFInfo
- Publication number
- CN105545373A CN105545373A CN201610080519.4A CN201610080519A CN105545373A CN 105545373 A CN105545373 A CN 105545373A CN 201610080519 A CN201610080519 A CN 201610080519A CN 105545373 A CN105545373 A CN 105545373A
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- China
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- cylinder
- seal ring
- steam
- main body
- labyrinth casing
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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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
Abstract
The invention provides a high-back-pressure turbine end vapor seal capable of being rapidly detached, and relates to the energy and power industry. An adjustment gasket A is arranged between a vapor seal main body A and a cylinder lower half part. An adjustment gasket A is arranged between the vapor seal main body A and a cylinder upper half part. The cylinder upper half part is connected with an axle sealing cover through hexagonal socket screws. An adjustment gasket B is arranged between the axial sealing cover and a cylinder seal main body B. The left side of the cylinder seal main body B is connected with one end of an anti-rotating pin A, and the other end of the anti-rotating pin A makes contact with the vapor seal main body A. The right side of the cylinder seal main body B is connected with one end of an anti-rotating pin B, and the other end of the anti-rotating pin B makes contact with a cylinder seal main body C. When the end vapor seal of a unit is replaced, bolts, the pins and other fastening pieces through which the axle sealing cover is connected with the cylinder upper half part and the cylinder lower half part are detached, the axle sealing cover is then detached, a midsplit bolt of a cylinder seal body is detached, the cylinder seal body is composed of two parts which can be taken out of the upper portion after the axle sealing cover is detached, and end vapor seal rings are replaced. After replacement, the end vapor seal rings are installed back according to a reverse sequence, and the end vapor seal can be easily, conveniently and rapidly replaced under the condition of not lifting the cylinder upper half part.
Description
Technical field
The present invention relates to energy power industry, be specifically related to a kind of high back pressure steam turbine and can fast dismantle end packing.
Background technique
High back pressure steam turbine refers to that initial steam pressure is between 8MPa ~ 12MPa, and exhaust steam pressure is at the back pressure turbine of 4MPa ~ 7MPa.The steam (standard configuration parameter of boiler) of high parameter is become middle parameter steam by high back pressure steam turbine, on the basis meeting manufacturing equipment vapour demand, drive the equipment such as various pump, blower fan, compressor and generator, substitute temperature-decreased pressure reducer simultaneously, improve energy utilization rate.
Steam turbine may cause rotor and packing to touch mill because of reasons such as start and stop, abnormal vibrations or misoperations in running, causes the gap between packing and rotor to increase.The end packing pressure reduction of general steam turbine is less, and the increase in gap obviously can not increase Steam loss, changes end packing when can repair with steam turbine.And the steam discharge parameter of high back pressure steam turbine is between 4 ~ 7MPa, exhaust steam pressure is higher, and end packing quantity is subject to the restriction of the factors such as structure, make to hold the forward and backward pressure reduction of each steam seal ring of packing larger, now, because the increase in gap significantly increases Steam loss, and then end gland leak-off is caused.For thoroughly solving end gland leak-off problem, just need to change steam seal ring, and when steam seal ring changed by general steam turbine, all need to open cylinder first, workload is very large, provides a kind of new technological scheme to solve the problems of the technologies described above spy.
Summary of the invention
The object of the invention is in order to the workload reduced during high back pressure steam turbine replacing end packing, realize simple and efficient, a kind of high back pressure steam turbine of special proposition can fast dismantle end packing.
The technical solution used in the present invention is: a kind of high back pressure steam turbine can fast dismantle end packing, labyrinth casing A and cylinder are provided with between second and adjust pad A, labyrinth casing A and cylinder are provided with between first and adjust pad A, cylinder first be connected by hexagon socket head cap screw with shaft seal cover, be provided with between shaft seal cover and labyrinth casing B and adjust pad B, be connected with stop pin A one end on the left of labyrinth casing B, the stop pin A the other end contacts with labyrinth casing A, be connected with stop pin B one end on the right side of labyrinth casing B, the stop pin B the other end contacts with labyrinth casing C.
Labyrinth casing A inwall is connected with steam seal ring A outer ring and is provided with spring between the two, steam seal ring A inner ring contacts with rotor, steam seal ring B is provided with on the right side of steam seal ring A, steam seal ring B outer ring is connected with labyrinth casing A and is provided with spring between the two, steam seal ring B inner ring contacts with rotor, described labyrinth casing C is connected with the outer ring of steam seal ring C and is provided with spring between the two, and steam seal ring C inner ring contacts with rotor.
The quantity of described steam seal ring A is three, and the quantity of steam seal ring B is four, and the quantity of steam seal ring C is one.
The invention has the beneficial effects as follows: when unit changes end packing, the fastening piece such as bolt, pin of shaft seal cover and the upper and lower half-connection of cylinder of can first dismantling, then shaft seal cover is dismantled, dismantle labyrinth casing split bolt again, labyrinth casing is made up of two halves, can take out from top respectively after dismounting shaft seal cover, carry out the replacing of holding steam seal ring.After replacing, return in reverse order and fill, can when do not open cylinder first, change end packing, simple and efficient.
accompanying drawing illustrates:
Fig. 1 is structural representation of the present invention.
embodiment:
With reference to Fig. 1, a kind of high back pressure steam turbine can fast dismantle end packing, labyrinth casing A2 and cylinder second be provided with between 15 and adjust pad A3, labyrinth casing A2 and cylinder first be provided with between 4 and adjust pad A3, cylinder first 4 to be connected by hexagon socket head cap screw 8 with shaft seal cover 7, be provided with between shaft seal cover 7 and labyrinth casing B10 and adjust pad B9, be connected with stop pin A6 one end on the left of labyrinth casing B10, the stop pin A6 the other end contacts with labyrinth casing A2, be connected with stop pin B11 one end on the right side of labyrinth casing B10, the stop pin B11 the other end contacts with labyrinth casing C12.
Labyrinth casing A2 inwall is connected with steam seal ring A1 outer ring and is provided with spring between the two, steam seal ring A1 inner ring contacts with rotor 14, steam seal ring B5 is provided with on the right side of steam seal ring A1, steam seal ring B5 outer ring is connected with labyrinth casing A2 and is provided with spring between the two, steam seal ring B5 inner ring contacts with rotor 14, described labyrinth casing C12 is connected with the outer ring of steam seal ring C13 and is provided with spring between the two, and steam seal ring C14 inner ring contacts with rotor 14.
The quantity of described steam seal ring A1 is three, and the quantity of steam seal ring B5 is four, and the quantity of steam seal ring C13 is one.
Shaft seal cover 7 is provided with vertical flanged surface and horizontal flange, respectively by hexagon socket head cap screw 8 and split be bolted to cylinder first 4 and cylinder second 15, axially and transverse direction finger setting.Each labyrinth casing adopts split Flange joint, and axially locating is adjusted by adjustment pad A3 and adjustment pad B9, and located lateral is located by split pin, and circumferential anti-rotation adopts stop pin A6 and stop pin B11 to realize.When unit needs to change steam seal ring, can directly dismantle shaft seal cover 7, then dismantle labyrinth casing B10 and labyrinth casing C12, then carry out replacings steam seal ring, when do not open cylinder first, change and hold packing, simple and efficient.
Claims (3)
1. a high back pressure steam turbine can fast dismantle end packing, it is characterized in that: labyrinth casing A and cylinder are provided with between second and adjust pad A, labyrinth casing A and cylinder are provided with between first and adjust pad A, cylinder first be connected by hexagon socket head cap screw with shaft seal cover, be provided with between shaft seal cover and labyrinth casing B and adjust pad B, be connected with stop pin A one end on the left of labyrinth casing B, the stop pin A the other end contacts with labyrinth casing A, be connected with stop pin B one end on the right side of labyrinth casing B, the stop pin B the other end contacts with labyrinth casing C.
2. high back pressure steam turbine according to claim 1 can fast dismantle end packing, it is characterized in that: labyrinth casing A inwall is connected with steam seal ring A outer ring and is provided with spring between the two, steam seal ring A inner ring contacts with rotor, steam seal ring B is provided with on the right side of steam seal ring A, steam seal ring B outer ring is connected with labyrinth casing A and is provided with spring between the two, steam seal ring B inner ring contacts with rotor, and described labyrinth casing C is connected with the outer ring of steam seal ring C and is provided with spring between the two, and steam seal ring C inner ring contacts with rotor.
3. high back pressure steam turbine according to claim 2 can fast dismantle end packing, it is characterized in that: the quantity of described steam seal ring A is three, and the quantity of steam seal ring B is four, and the quantity of steam seal ring C is one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610080519.4A CN105545373B (en) | 2016-02-05 | 2016-02-05 | High-back-pressure turbine end vapor seal capable of being rapidly detached |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610080519.4A CN105545373B (en) | 2016-02-05 | 2016-02-05 | High-back-pressure turbine end vapor seal capable of being rapidly detached |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105545373A true CN105545373A (en) | 2016-05-04 |
| CN105545373B CN105545373B (en) | 2017-05-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610080519.4A Active CN105545373B (en) | 2016-02-05 | 2016-02-05 | High-back-pressure turbine end vapor seal capable of being rapidly detached |
Country Status (1)
| Country | Link |
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| CN (1) | CN105545373B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106761957A (en) * | 2016-11-29 | 2017-05-31 | 东方电气集团东方汽轮机有限公司 | Labyrinth casing structure between a kind of efficient steam turbine high pressure |
| CN111396142A (en) * | 2020-04-25 | 2020-07-10 | 中国船舶重工集团公司第七0三研究所 | Steam seal structure is dismantled to low parameter saturated steam turbine |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3915459A (en) * | 1974-05-13 | 1975-10-28 | Dresser Ind | Turbo-machinery seal |
| JP2010019190A (en) * | 2008-07-11 | 2010-01-28 | Toshiba Corp | Steam turbine and method of cooling steam turbine |
| CN102341628A (en) * | 2009-03-06 | 2012-02-01 | 西门子公司 | Labyrinth sealing bushing for turbo machine and method for assembly of labyrinth seal having said labyrinth sealing bushing |
| CN104314624A (en) * | 2014-08-20 | 2015-01-28 | 东方电气集团东方汽轮机有限公司 | Device and method for monitoring center change of air cylinder in process of covering cylinder of steam turbine |
| JP2015075056A (en) * | 2013-10-10 | 2015-04-20 | 三菱重工業株式会社 | Steam turbine |
| CN104832224A (en) * | 2010-12-15 | 2015-08-12 | 三菱重工业株式会社 | Seal structure for turbocharger housing |
| CN205330739U (en) * | 2016-02-05 | 2016-06-22 | 中国船舶重工集团公司第七�三研究所 | End vapor seal can swiftly be dismantled to high back pressure steam turbine |
-
2016
- 2016-02-05 CN CN201610080519.4A patent/CN105545373B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3915459A (en) * | 1974-05-13 | 1975-10-28 | Dresser Ind | Turbo-machinery seal |
| JP2010019190A (en) * | 2008-07-11 | 2010-01-28 | Toshiba Corp | Steam turbine and method of cooling steam turbine |
| CN102341628A (en) * | 2009-03-06 | 2012-02-01 | 西门子公司 | Labyrinth sealing bushing for turbo machine and method for assembly of labyrinth seal having said labyrinth sealing bushing |
| CN104832224A (en) * | 2010-12-15 | 2015-08-12 | 三菱重工业株式会社 | Seal structure for turbocharger housing |
| JP2015075056A (en) * | 2013-10-10 | 2015-04-20 | 三菱重工業株式会社 | Steam turbine |
| CN104314624A (en) * | 2014-08-20 | 2015-01-28 | 东方电气集团东方汽轮机有限公司 | Device and method for monitoring center change of air cylinder in process of covering cylinder of steam turbine |
| CN205330739U (en) * | 2016-02-05 | 2016-06-22 | 中国船舶重工集团公司第七�三研究所 | End vapor seal can swiftly be dismantled to high back pressure steam turbine |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106761957A (en) * | 2016-11-29 | 2017-05-31 | 东方电气集团东方汽轮机有限公司 | Labyrinth casing structure between a kind of efficient steam turbine high pressure |
| CN106761957B (en) * | 2016-11-29 | 2019-03-29 | 东方电气集团东方汽轮机有限公司 | Labyrinth casing structure between a kind of efficient steam turbine high pressure |
| CN111396142A (en) * | 2020-04-25 | 2020-07-10 | 中国船舶重工集团公司第七0三研究所 | Steam seal structure is dismantled to low parameter saturated steam turbine |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105545373B (en) | 2017-05-10 |
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