EP2295730A2 - Boîtier de turbine avec revêtement de paroi de protection thermique - Google Patents

Boîtier de turbine avec revêtement de paroi de protection thermique Download PDF

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Publication number
EP2295730A2
EP2295730A2 EP10168925A EP10168925A EP2295730A2 EP 2295730 A2 EP2295730 A2 EP 2295730A2 EP 10168925 A EP10168925 A EP 10168925A EP 10168925 A EP10168925 A EP 10168925A EP 2295730 A2 EP2295730 A2 EP 2295730A2
Authority
EP
European Patent Office
Prior art keywords
turbine housing
wall cladding
wall
parting
parting line
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.)
Withdrawn
Application number
EP10168925A
Other languages
German (de)
English (en)
Inventor
Klaus Lochner
Matthias Strauch
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Original Assignee
Siemens AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Publication of EP2295730A2 publication Critical patent/EP2295730A2/fr
Withdrawn legal-status Critical Current

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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
    • F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
    • F01D25/08—Cooling; Heating; Heat-insulation
    • F01D25/14—Casings modified therefor
    • F01D25/145—Thermally insulated casings

Definitions

  • the invention relates to a turbine housing, in particular a steam turbine, which consists of a turbine housing lower part and a turbine housing upper part, which are joined together in the assembled state and thereby form a parting line at their joining surfaces, wherein each turbine housing part in the region of the parting line has a Sectionfugenflansch over which the Turbine housing parts are screwed together by means of part joint screws.
  • the outer housings of turbine housings are usually formed in two parts and comprise a turbine housing lower part and a turbine housing upper part.
  • the two-part design of the turbine housing facilitates the installation of the rotor.
  • the turbine housing lower part and the turbine housing upper part are joined together in the mounted state via joining surfaces.
  • the turbine housing lower part and the turbine housing upper part each form a parting line at their joining surfaces.
  • the turbine housing parts In the region of the parting line, the turbine housing parts have a Sectionfugenflansch over which the turbine housing parts are bolted together by means of parting screws.
  • leaks In the area of the parting joints, leaks frequently occur during operation of the turbine, so that in the case of a steam turbine, hot steam can escape through the parting line to the outside.
  • the leaks occur in particular between adjacent chambers of the turbine housing.
  • the reason for the leak are in particular the high temperature differences between the adjacent chambers, and as a result of the temperature distribution, within the turbine housing parts.
  • the component temperature distribution is significantly influenced by the fluid temperature, the convective heat transfer between the fluid and the housing parts and the heat radiation.
  • the wall thickness of the housing parts is due to the Generalfugenflansche uneven, resulting in a non-uniform temperature distribution and thus stresses in the component, which lead to leaks in the joint area.
  • the turbine housing according to the invention comprising a turbine housing lower part and a turbine housing upper part, which are joined together in the assembled state and each form a parting line at their joining surfaces, each turbine housing part in the region of the parting a sectionfugenflansch over which the turbine housing parts are screwed together by means of parting screws, draws characterized in that on a inner wall of the turbine housing, in the region of the Generalfugenflansches, a wall cladding is provided, which is arranged and designed so that it reduces the convective heat transfer and heat radiation in the region of the Generalfugenflansches.
  • the reduction of the convective heat transfer and the heat radiation in the region of the sectionfugenflansches leads to a reduction of the axial temperature gradient and allows for high temperature differences between adjacent chambers a secure seal of the turbine housing in the area of the parting lines.
  • the wall cladding is a simple and effective measure.
  • the wall cladding consists essentially of a metallic material.
  • the metallic material is inexpensive, easy to manufacture and easy to attach to the inner wall of the turbine housing. If necessary, a damaged wall cladding can be easily replaced, since metallic materials are easy to obtain and to work on site.
  • a particularly preferred embodiment of the invention provides that the wall cladding is fixed by means of a heat-elastic attachment to the inner wall of the turbine housing.
  • the heat-elastic fastening of the wall cladding ensures that there are no tensions in the wall cladding due to temperature gradients that could possibly damage the wall cladding or that could damage or damage the attachment to the inner wall.
  • a particular embodiment of the invention provides that the heat-elastic fastening is effected by means of screwing.
  • the screw connection can be formed very easily and ensures a permanent and secure attachment of the wall cladding on the inner wall of the turbine housing or the turbine housing part.
  • the screw is carried by at least one spacer screw.
  • the spacer screw ensures that the wall cladding is not applied directly to the turbine housing part. As a result, a gap is achieved between the wall cladding and the turbine housing, which provides for improved shielding against convective heat transfer and heat radiation.
  • a further preferred embodiment of the invention provides that the respective wall cladding extends over a circumferential angle ⁇ of 30 ° to 60 °, measured from the respective parting line.
  • Such trained wallcovering ensures sufficient protection of the parting line with low material usage.
  • a wall cladding with a larger circumferential angle is possible, but would contribute to an insignificant improvement. With a smaller circumferential angle of the wall cladding, the protection in the area of the parting line would only be insufficient, so that leaks in the area of the parting line can not be effectively and safely excluded.
  • a further preferred embodiment of the invention provides that the wall cladding extends in the axial direction over one to three divisions of the partial joint screws. As a result, a sufficient coverage of the parting line is ensured, and reduced the material requirement to the necessary minimum. A larger wall cladding would not contribute to improving the seal in the joint area. On the other hand, a reduction in the axial extent of the wall cladding would mean that a reliable sealing of the parting line can not be ensured.
  • the turbine housing according to the invention is based on the idea that the convective heat transfer and the heat radiation from the fluid to the turbine housing wall can be effectively reduced by simple wall cladding in the region of the parting line, whereby leaks in the area of the parting joints can be prevented in a simple and cost-effective manner.
  • a wall cladding can be used in particular for steam turbine housing, where often leakage problems in the parting joint occur and these must be reduced with great effort.
  • each is a greatly simplified representations, in which only the essential, necessary to describe the invention, components are shown.
  • the same or functionally identical components are cross-figurative provided with the same reference numerals.
  • FIG. 1 shows a three-dimensional section through a turbine housing according to the invention.
  • the turbine housing 1 comprises a turbine housing lower part 2 and a turbine housing upper part 3.
  • the two turbine housing parts 2, 3 are joined together in the mounted state.
  • part joints 4 are formed at the joining surfaces. So that no fluid can flow from the inside of the turbine housing 1 to the outside, the part joints 4 must be as tight as possible.
  • the turbine housing lower part 2 and the turbine housing upper part 3 are firmly screwed together.
  • both turbine housing parts each have parting flanges 5, 6.
  • 6 are parting screw 11 (in FIG. 1 not recognizable).
  • the turbine housing 1 By screwing the two turbine housing parts 2, 3, the turbine housing 1 is sealed. On the inside of the outer housing webs 12 are provided for receiving the guide blade carrier at different locations. Through the vane different chambers 13, 14 are formed within the turbine housing 1. Between the individual chambers 13, 14 are high temperature differences. Due to the high temperature differences between adjacent chambers 13, 14 there is a different component temperature or a component temperature distribution which lead to different expansions of the components, whereby leaks in the region of the parting line 4 arise. The component temperature distribution is significantly influenced by the fluid temperature, the convective heat transfer between the fluid and the components and by the heat radiation. To leaks due to the different dimensions of the components to prevent, a minimization of the axial temperature gradient in the sectionfugenflansch Switzerland is necessary.
  • the minimization of the axial temperature gradient in the sectionfugenflansch Scheme is achieved by a wall panel 8.
  • the wall cladding 8 is arranged and formed so that it significantly reduces the convective heat transfer and the heat radiation in the region of the Generalfugenflansches 5, 6. As a result, the different expansion of the components is reduced and a secure seal in the region of the Generalfugenflansches 4 achieved.
  • the formation of the wall cladding 8 is in FIG. 2 shown in detail and will be described in more detail below.
  • FIG. 2 shows a radial section through the turbine housing 1, as it is already in FIG. 1 is described in more detail.
  • a wall panel 8 is provided on the inner wall 7 of the turbine housing 1, in the region of the Operafugenflansches 5, 6.
  • the wall cladding 8 consists essentially of a metallic material. Of course, other heat-resistant materials can be used.
  • the wall cladding 8 is fixed by means of a heat-elastic fastening 9 on the inner wall 7 of the turbine housing parts 2, 3.
  • the heat-elastic attachment 9 ensures that there is no damage to the wall panel 8 in an expansion due to thermal expansion.
  • the wall cladding 8 is formed in two parts, wherein in each case a wall cladding 8 for shielding a sectionfugenflansches 5, 6 is provided.
  • the invention also includes one-piece wall panels that extend over both Operafugenflansche 5, 6.
  • the two-piece design has in contrast to the one-piece design only the advantage of easier assembly and disassembly of the turbine housing shell 2 and turbine housing part 3.
  • the heat-elastic fastening 9 by means of screw 10.
  • the screw 10 is carried out at one end of the wall paneling 8.
  • the other end of the wall paneling 8 can be welded directly to the corresponding housing part.
  • the screw 10 is effected by means of at least one spacer screw 11. By using a spacer screw 11, a certain distance between the wall panel 8 and the inner wall 7 of the turbine housing 1 is achieved.
  • the wall cladding 8 thus both the convective heat transfer and the heat radiation in the region of the sectionfugenflansches is significantly reduced, resulting in a minimization of the axial temperature gradient in Generalfugeflansch Scheme and a secure sealing of the parting lines 4 comes.
  • the respective wall cladding 8 extends in a two-part training preferably over a circumferential angle ⁇ of about 30 ° to 60 °, measured from the respective parting line 4. At a smaller circumferential angle ⁇ of the wall cladding, the heat shield decreases, whereby a secure seal of the parting lines 4 is not guaranteed can be. Larger circumferential angles ⁇ of over 60 ° bring no significant advantage, based on the shield.
  • the wall cladding 8 should extend over an approximately one to three divisions of the parting screw to ensure a secure shielding and thus sealing of the parting lines 4.
  • the wall cladding 8 is arranged axially between in each case 2 chambers of the turbine housing 1.
  • the turbine housing 1 according to the invention with a wall cladding 8 arranged on the inner wall 7 of the turbine housing 1, a minimization of the axial temperature gradient in the partial joint flange area by an internal heat shield can thus be achieved in a particularly simple and cost-effective manner be achieved. As a result, the tightness of the part joints 4 is significantly increased and improves the reliability.
  • the turbine housing 1 with the wall cladding 8 can be used particularly effectively for steam turbines. In principle, however, it is suitable for all types of turbine housings. A retrofit of existing turbine housing is possible.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)
  • Supercharger (AREA)
  • Gasket Seals (AREA)
EP10168925A 2009-08-13 2010-07-08 Boîtier de turbine avec revêtement de paroi de protection thermique Withdrawn EP2295730A2 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102009037413A DE102009037413A1 (de) 2009-08-13 2009-08-13 Turbinengehäuse mit Wandverkleidung

Publications (1)

Publication Number Publication Date
EP2295730A2 true EP2295730A2 (fr) 2011-03-16

Family

ID=43038089

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10168925A Withdrawn EP2295730A2 (fr) 2009-08-13 2010-07-08 Boîtier de turbine avec revêtement de paroi de protection thermique

Country Status (7)

Country Link
US (1) US20110038723A1 (fr)
EP (1) EP2295730A2 (fr)
JP (1) JP2011038522A (fr)
CN (1) CN101994530A (fr)
BR (1) BRPI1003008A2 (fr)
DE (1) DE102009037413A1 (fr)
RU (1) RU2010133860A (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102699408A (zh) * 2012-06-16 2012-10-03 南通百事达数控机床有限公司 一种剪板机刀架回程装置
CN103343705B (zh) * 2013-07-19 2015-02-18 东方电气集团东方汽轮机有限公司 汽轮机中分面密封方法及密封结构
KR101733626B1 (ko) * 2014-01-15 2017-05-24 두산중공업 주식회사 고압 터빈의 수압시험장치 및 수압시험방법
CN104454046B (zh) * 2014-11-27 2017-01-04 浙江鸿峰重工机械有限公司 一种汽缸体上下半铸件

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2815645A (en) * 1955-03-01 1957-12-10 Gen Electric Super-critical pressure elastic fluid turbine
US4772178A (en) * 1987-01-28 1988-09-20 Westinghouse Electric Corp. Thermal shield for the steam inlet connection of a steam turbine
US5133640A (en) * 1990-06-21 1992-07-28 Westinghouse Electric Corp. Thermal shield for steam turbines
JP3776541B2 (ja) * 1997-01-17 2006-05-17 三菱重工業株式会社 蒸気タービン車室フランジの冷却構造
JPH10205306A (ja) * 1997-01-22 1998-08-04 Mitsubishi Heavy Ind Ltd タービン車室

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None

Also Published As

Publication number Publication date
DE102009037413A1 (de) 2011-02-24
US20110038723A1 (en) 2011-02-17
JP2011038522A (ja) 2011-02-24
BRPI1003008A2 (pt) 2012-04-17
CN101994530A (zh) 2011-03-30
RU2010133860A (ru) 2012-02-20

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