US20110038723A1 - Turbine housing with wall cladding - Google Patents

Turbine housing with wall cladding Download PDF

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Publication number
US20110038723A1
US20110038723A1 US12/854,202 US85420210A US2011038723A1 US 20110038723 A1 US20110038723 A1 US 20110038723A1 US 85420210 A US85420210 A US 85420210A US 2011038723 A1 US2011038723 A1 US 2011038723A1
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US
United States
Prior art keywords
turbine housing
joint
wall cladding
wall
region
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.)
Abandoned
Application number
US12/854,202
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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
Assigned to SIEMENS AKTIENGESELLSCHAFT reassignment SIEMENS AKTIENGESELLSCHAFT ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: LOCHNER, KLAUS, STRAUCH, MATTHIAS
Publication of US20110038723A1 publication Critical patent/US20110038723A1/en
Abandoned 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 in this way each embody a joint at their joining areas, with each turbine housing part comprising a joint flange in the region of the joint, by way of which the turbine housing parts are screwed to one another by means of joint screws.
  • 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 in this way each embody a joint at their joining areas, with each turbine housing part comprising a joint flange in the region of the joint, by way of which the turbine housing parts are screwed to one another by means of joint screws.
  • the exterior housings of turbine housings are usually embodied in two parts and include a turbine housing lower part and a turbine housing upper part.
  • the two part embodiment of the turbine housing facilitates assembly of the rotor.
  • the turbine housing lower part and the turbine housing upper part are joined to one another in the assembled state by way of joining areas.
  • the turbine housing lower part and the turbine housing upper part herewith each form a joint at their joining areas.
  • the turbine housing parts comprise a joint flange, by way of which the turbine housing parts are screwed to one another by means of joint screws.
  • leakages In the region of the joints, leakages frequently occur during operation of the turbine, so that in the case of a steam turbine, hot steam can escape outwards through the joint.
  • the leakages herewith occur particularly between adjacent chambers of the turbine housing.
  • the reasons behind the leakage 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 influenced in a decisive fashion here by way of the fluid temperature, the convective heat transfer between the fluid and the housing parts and by way of the thermal radiation.
  • the wall thickness of the housing parts is non-uniform on account of the joint flange, as a result of which a non-uniform temperature distribution and thus stresses appear in the component, which result in leakages in the joint area.
  • An object of the invention is to achieve a sealing of the joints which is simpler and improved by comparison with the prior art.
  • the inventive turbine housing including a turbine housing lower part and a turbine housing upper part, which are joined to one another in the assembled state, and herewith each faun a joint on their joining areas, with each turbine housing part in the region of the joint having a joint flange, by way of which the turbine housing parts are screwed to one another by means of joint screws, is characterized in that a wall cladding is provided on an inner wall of the turbine housing, in the region of the joint flange, said wall cladding being arranged and embodied such that it reduces the convective heat transfer and the thermal radiation in the region of the joint flange.
  • the reduction in the convective heat transfer and the thermal radiation in the region of the joint flange results in a reduction in the axial temperature gradient and also enables a reliable sealing of the turbine housing in the region of the joints in the event of high temperature differences between adjacent chambers.
  • the wall cladding is a simple and effective measure here.
  • the wall cladding essentially consists of a metallic material.
  • the metallic material is cost-effective, can be easily manufactured and easily fastened 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 process on site.
  • a particularly preferred embodiment of the invention provides for the wall cladding to be fastened to the inner wall of the turbine housing by means of a thermoelastic fastening.
  • the thermoelastic fastening of the wall cladding ensures that no stresses result in the wall cladding as a result of temperature gradients, which may possibly result in damage to the wall cladding and/or which may destroy and/or damage the fastening to the inner wall.
  • thermoelastic fastening to take place by means of screwing.
  • the screwing can be embodied very easily and provides for a durable and reliable fastening of the wall cladding to the inner wall of the turbine housing and/or turbine housing part.
  • the screwing particularly preferably takes place by means of at least one distance screw.
  • the distance screw ensures that the wall cladding does not rest directly against the turbine housing part.
  • a gap is herewith achieved between the wall cladding and the turbine housing, which provides for an improved shielding against convective heat transfer and thermal radiation.
  • a further preferred embodiment of the invention provides that the respective wall cladding extends through a circumferential angle ⁇ of 30° to 60°, measured from the respective joint.
  • a wall cladding embodied in such a way provides for adequate protection of the joint while simultaneously requiring minimal material usage.
  • a wall cladding with a larger circumferential angle is nevertheless possible, but would however only contribute to an insignificant improvement.
  • the protection in the region of the joint would only be insufficient, so that leakages in the region of the joint cannot be ruled out effectively and reliably.
  • a further preferred embodiment of the invention provides that the wall cladding extends in the axial direction across one to three divisions in the joint screws. An adequate coverage of the joint is herewith ensured and the material requirement is reduced to the necessary minimum. A larger wall cladding would not contribute to an improvement in the sealing in the joint region. By contrast, a reduction in the axial extension of the wall cladding would result in it not being possible to ensure a reliable sealing of the joint.
  • the idea underlying the inventive turbine housing is that the convective heat transfer and the thermal radiation from the fluid to the turbine housing wall can be effectively reduced by means of a simple wall cladding in the region of the joint, as a result of which leakages in the region of the joints can be prevented in a simple and cost-effective fashion.
  • a wall cladding can be used in particular for steam turbine housings, where leakage problems frequently occur in the region of the joint and have to be reduced with significant effort.
  • FIG. 1 shows a schematic representation of a three-dimensional section through an inventive turbine housing
  • FIG. 2 shows a schematic representation of a radial section through the inventive turbine housing.
  • FIG. 1 shows a three-dimensional section through an inventive turbine housing.
  • the turbine housing 1 includes a turbine housing lower part 2 and a turbine housing upper part 3 .
  • the two turbine housing parts 2 , 3 are joined to one another in the assembled state.
  • Joints 4 thereby form on the joining areas in each instance.
  • the joints 4 must be closed in as tight a fashion as possible.
  • the turbine housing lower part 2 and the turbine housing upper part 3 are fixedly screwed to one another.
  • both turbine housing parts comprise joint flanges 5 , 6 in each instance. Joint screws 11 (not apparent in FIG.
  • the turbine housing 1 is sealed by means of the screw connection of the two turbine housing parts 2 , 3 .
  • Webs 12 for receiving the fixed blade carrier are provided at different points on the interior of the outer housing.
  • Different chambers 13 , 14 are embodied within the turbine housing 1 by means of the guide vanes. High temperature differences exist between the individual chambers 13 , 14 . The high temperature differences between adjacent chambers 13 , 14 brings about a different component temperature and/or component temperature distribution, which result in different expansions of the components, as a result of which leakages occur in the region of the joint 4 .
  • the component temperature distribution is influenced in a decisive fashion by the fluid temperature, the convective heat transfer between the fluid and the components and by the thermal radiation.
  • a minimization of the axial temperature gradient in the joint flange region is needed.
  • the minimization of the axial temperature gradient in the joint flange region is achieved by means of a wall cladding 8 .
  • the wall cladding 8 is arranged and embodied such that it significantly reduces the convective heat transfer and thermal radiation in the region of the joint flange 5 , 6 .
  • the different expansion of the components is herewith significantly reduced and a reliable sealing in the region of the joint flange 4 is achieved.
  • the embodiment of the wall cladding 8 is shown in detail in FIG. 2 and is described in more detail below.
  • FIG. 2 shows a radial section through the turbine housing 1 , as already described in more detail in FIG. 1 .
  • a wall cladding 8 is provided on the inner wall 7 of the turbine housing 1 , in the region of the joint flange 5 , 6 .
  • the wall cladding 8 essentially consists of a metallic material. Other heat-resistant materials can naturally also be used.
  • the wall cladding 8 is fastened to the inner wall 7 of the turbine housing parts 2 , 3 by means of a thermoelastic fastening 9 .
  • the thermoelastic fastening 9 ensures that the wall cladding 8 is not damaged in the event of an expansion as a result of thermal expansion.
  • the wall cladding 8 is embodied in two parts, with one wall cladding 8 being provided in each instance to shield a joint flange 5 , 6 .
  • the invention nevertheless also includes one-piece wall claddings, which extend across both joint flanges 5 , 6 .
  • the two part embodiment is only advantageous in terms of a simpler assembly and disassembly of the turbine housing upper part 2 and the turbine housing lower part 3 .
  • the thermoelastic fastening 9 takes place by means of a screw connection 10 .
  • the screw connection 10 takes place here at one end of the wall cladding 8 .
  • the other end of the wall cladding 8 can be directly welded to the corresponding housing part.
  • the screw connection 10 takes place here by means of at least one distance screw 11 .
  • the use of a distance screw 11 achieves a certain distance between the wall cladding 8 and the inner wall 7 of the turbine housing 1 .
  • the heat transfer from the wall cladding 8 to the joint flange 5 , 6 is significantly reduced by the intermediate space between the wall cladding 8 and the inner wall 7 of the turbine housing 1 . A heat transfer can thus only take place by way of the distance screw 11 and the welding point.
  • the thermal radiation from the wall cladding to the joint flange 5 , 6 is significantly less than thermal radiation without the wall cladding.
  • the wall cladding 8 therefore significantly reduces both the convective heat transfer and also the thermal radiation in the region of the joint flange, as a result of which the axial temperature gradient in the joint flange region is minimized and a reliable sealing of the joint 4 is achieved.
  • the respective wall cladding 8 extends, in the case of a two part embodiment, preferably through a circumferential angle ⁇ of approximately 30° to 60°, measured from the respective joint 4 . With a smaller circumferential angle ⁇ of the wall cladding, the thermal shield is reduced, as a result of which a reliable sealing of the joint 4 cannot be ensured. Larger circumferential angles ⁇ of above 60° do not bring out about appreciable advantage relative to the shielding.
  • the wall cladding 8 should extend across approximately one to three divisions of the joint screws in order to ensure a reliable shielding and thus sealing of the joints 4 .
  • the wall cladding 8 is arranged axially between 2 chambers of the turbine housing 1 in each instance.
  • the inventive turbine housing 1 having a wall cladding 9 arranged on the inner wall 7 of the turbine housing 1 , it is thus possible to minimize the axial temperature gradients in the joint flange region by means of an inner thermal shielding in a simple and cost-effective fashion.
  • the leakage of the joint 4 is herewith increased considerably and the operational reliability is improved.
  • the turbine housing 1 with the wall cladding 8 can be used particularly effectively for steam turbines. It is however basically suited to any type of turbine housing. Retrofitting of the already existing turbine housing is possible.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)
  • Gasket Seals (AREA)
  • Supercharger (AREA)
US12/854,202 2009-08-13 2010-08-11 Turbine housing with wall cladding Abandoned US20110038723A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102009037413A DE102009037413A1 (de) 2009-08-13 2009-08-13 Turbinengehäuse mit Wandverkleidung
DE102009037413.2 2009-08-13

Publications (1)

Publication Number Publication Date
US20110038723A1 true US20110038723A1 (en) 2011-02-17

Family

ID=43038089

Family Applications (1)

Application Number Title Priority Date Filing Date
US12/854,202 Abandoned US20110038723A1 (en) 2009-08-13 2010-08-11 Turbine housing with wall cladding

Country Status (7)

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

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103343705A (zh) * 2013-07-19 2013-10-09 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
US20150198498A1 (en) * 2014-01-15 2015-07-16 Doosan Heavy Industries & Construction Co., Ltd. Hydrostatic test device and hydrostatic test method for high pressure turbine

Families Citing this family (2)

* 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
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

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5133640A (en) * 1990-06-21 1992-07-28 Westinghouse Electric Corp. Thermal shield for steam turbines
JPH10196312A (ja) * 1997-01-17 1998-07-28 Mitsubishi Heavy Ind Ltd 蒸気タービン車室フランジの冷却構造

Family Cites Families (3)

* 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
JPH10205306A (ja) * 1997-01-22 1998-08-04 Mitsubishi Heavy Ind Ltd タービン車室

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5133640A (en) * 1990-06-21 1992-07-28 Westinghouse Electric Corp. Thermal shield for steam turbines
JPH10196312A (ja) * 1997-01-17 1998-07-28 Mitsubishi Heavy Ind Ltd 蒸気タービン車室フランジの冷却構造

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103343705A (zh) * 2013-07-19 2013-10-09 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
US20150198498A1 (en) * 2014-01-15 2015-07-16 Doosan Heavy Industries & Construction Co., Ltd. Hydrostatic test device and hydrostatic test method for high pressure turbine
US9771833B2 (en) * 2014-01-15 2017-09-26 Doosan Heavy Industries & Construction Co., Ltd. Hydrostatic test device and hydrostatic test method for high pressure turbine

Also Published As

Publication number Publication date
JP2011038522A (ja) 2011-02-24
BRPI1003008A2 (pt) 2012-04-17
CN101994530A (zh) 2011-03-30
RU2010133860A (ru) 2012-02-20
DE102009037413A1 (de) 2011-02-24
EP2295730A2 (de) 2011-03-16

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Date Code Title Description
AS Assignment

Owner name: SIEMENS AKTIENGESELLSCHAFT, GERMANY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:LOCHNER, KLAUS;STRAUCH, MATTHIAS;REEL/FRAME:024819/0581

Effective date: 20100802

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION