EP2112334A1 - Boîtier extérieur pour une turbomachine - Google Patents

Boîtier extérieur pour une turbomachine Download PDF

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Publication number
EP2112334A1
EP2112334A1 EP08007703A EP08007703A EP2112334A1 EP 2112334 A1 EP2112334 A1 EP 2112334A1 EP 08007703 A EP08007703 A EP 08007703A EP 08007703 A EP08007703 A EP 08007703A EP 2112334 A1 EP2112334 A1 EP 2112334A1
Authority
EP
European Patent Office
Prior art keywords
outer housing
housing
projection
region
barrier coating
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Withdrawn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
EP08007703A
Other languages
German (de)
English (en)
Inventor
Eduard Dr. Jenikejew
Yevgen Dr. Kostenko
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
Siemens Corp
Original Assignee
Siemens AG
Siemens Corp
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, Siemens Corp filed Critical Siemens AG
Priority to EP08007703A priority Critical patent/EP2112334A1/fr
Publication of EP2112334A1 publication Critical patent/EP2112334A1/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Withdrawn legal-status Critical Current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
    • 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
    • F01D25/24—Casings; Casing parts, e.g. diaphragms, casing fastenings
    • F01D25/26—Double casings; Measures against temperature strain in casings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2230/00—Manufacture
    • F05D2230/90—Coating; Surface treatment
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2260/00—Function
    • F05D2260/94—Functionality given by mechanical stress related aspects such as low cycle fatigue [LCF] of high cycle fatigue [HCF]
    • F05D2260/941—Functionality given by mechanical stress related aspects such as low cycle fatigue [LCF] of high cycle fatigue [HCF] particularly aimed at mechanical or thermal stress reduction
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2300/00—Materials; Properties thereof
    • F05D2300/20—Oxide or non-oxide ceramics
    • F05D2300/22—Non-oxide ceramics
    • F05D2300/228—Nitrides
    • F05D2300/2285—Nitrides of zirconium
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2300/00—Materials; Properties thereof
    • F05D2300/60—Properties or characteristics given to material by treatment or manufacturing
    • F05D2300/611—Coating

Definitions

  • the invention relates to an outer casing for a turbomachine, wherein the outer casing is formed along a flow direction, wherein means for receiving an inner casing are provided and the inner casing is attachable within the outer casing, wherein the outer casing has an outflow part for conducting flow medium flowing out of a flow channel.
  • a steam turbine in particular a high-pressure steam turbine understood.
  • high-pressure steam turbines a high-pressure and high-pressure steam is released in a flow passage, thereby forcing a rotation of a rotor.
  • the incoming steam has temperatures up to 620 ° C and pressures up to 350 bar. This vapor flows through vanes and blades in the flow channel, reducing the temperature and pressure.
  • high-pressure steam turbines are formed with an inner housing carrying the guide vanes and with an outer housing arranged around the inner housing.
  • the steam initially flows along an inflow region between the rotor and the inner housing in the flow channel. Subsequently, the steam flows out of the flow channel in a region between the inner housing and the outer housing. Since the temperature of the steam in the flow direction decreases, the rotor, the inner housing and the outer housing has a temperature gradient in the flow direction.
  • suitable materials must be selected to withstand the thermal stresses.
  • an outer housing for a turbomachine wherein the outer housing is formed along a flow direction, wherein means for receiving an inner housing are provided and the inner housing is attachable within the outer housing, wherein the outer housing is a discharge part for conducting flow medium flowing out of a flow channel having, wherein on the inner surface of the outflow part, a thermal barrier coating is applied.
  • the invention thus goes the way to reduce thermal stresses in that a thermal barrier coating is applied to the inner surface of the discharge part.
  • the thermal barrier coating is applied to the locations on the inner surface of the discharge part, which are subjected to bending. As a result of the stress on bending, stress concentrations result due to creep, which could lead to cracks.
  • the thermal barrier coating reduces the temperature gradient, resulting in a reduction in the risk of cracking.
  • the outer housing is designed as a pot housing. Pot housings are formed without axial parting, which means that this type of outer housing can withstand higher internal pressure. Thereby, the steam flowing in such a steam turbine formed with a pot housing can have a higher temperature and a higher pressure.
  • the outer housing has a projection for receiving the inner housing, wherein the heat-insulating layer is applied to the projection.
  • the inner housing is connected to the outer housing, wherein the inner housing is attached to a projection of the outer housing.
  • This projection protrudes from the inner surface of the outer housing and is therefore subjected to bending.
  • the temperature gradients occurring in the region of this projection could cause cracks in the outflow part.
  • the thermal barrier coating is applied to the projection, since cracks would be expected in this area.
  • the outflow part has a first deflection region directly adjacent to the flow channel.
  • This first deflection region directs the vapor flowing out of the flow channel from an axial direction into a radial direction.
  • the second deflection region Adjacent to the first deflection region, the second deflection region, which is designed to divert the exhaust steam from the radial direction in the axial direction.
  • the steam is first deflected from the axial direction in the radial direction and then redirected from the radial direction in the axial direction, wherein the flow direction of the steam is opposite to the flow direction in the flow channel reversed.
  • the second area adjoins a termination area adjacent to the projection.
  • the inner housing is attached.
  • the thermal barrier coating is arranged only in the termination area, since this area is claimed on bending and there cracks are to be expected.
  • the thermal barrier coating is formed of the zirconia material.
  • FIG WO 2006/133980 A1 Further examples of a thermal barrier coating and of adhesive layers which connect the thermal barrier coating to the outer shell and further layers are shown in FIG WO 2006/133980 A1 disclosed. The content of WO 2006/133980 A1 is thus fully included in the disclosure of this application.
  • FIG. 1 shows a high-pressure steam turbine 1.
  • a rotor 3 is rotatably mounted.
  • the rotor 3 includes blades, not shown.
  • an inner housing 4 is arranged.
  • the inner housing 4 has guide vanes, not shown. Between the rotor 3 and the inner housing 4, a flow channel 5 is formed.
  • an outer housing 6 is arranged.
  • the outer housing 6 is formed in Topfbauweise. This means that the outer housing 6 consists of a pot part 6a and a cover part 6b, wherein the cover part 6b is arranged on the pot part 6a.
  • the outer housing 6a thereby has no axial parting line.
  • live steam flows via an inflow region 7 into the high-pressure steam turbine 1.
  • the temperature of the live steam can be up to 620 ° C.
  • the pressure of the live steam can have pressures of up to 350 bar. After flowing through the flow channel 5, the pressure and the temperature of the steam is reduced, so that the temperature of the vapor in the outflow part 8 is significantly lower than the temperature in the inflow region 7.
  • the outer housing 6 comprises a lid bottom 6 c, which adjoins the flow channel 5.
  • the outflow part 8 comprises a first deflection region 9 which adjoins the flow channel 5 directly.
  • the first deflection region 9 is designed such that the vapor is deflected from an axial direction 10 into a radial direction 11.
  • the geometry of the lid bottom 6c is adapted for this purpose.
  • the outflow part 8 has a curvature 12 in the region of the first deflection region 9.
  • a second deflection region 13 adjoins the first deflection region 9.
  • the vapor is deflected again in an axial direction 14 from the radial direction 11 in the second deflection region 13, the axial direction 14 being opposite to the axial direction 10.
  • the outer housing has a means 15 for receiving the inner housing 4.
  • the means 15 is in this case formed as a projection 16.
  • the projection 16 adjoins the inner housing 4.
  • the outer housing 6 has an inner surface 17.
  • the inner surface 17 is in this case made substantially cylindrical.
  • the projection 16 is in this case designed such that a material accumulation with respect to the cylindrical inner surface 17 to a means 15th leads, which is adapted to secure the inner housing 4 thereto.
  • a terminating area 18 adjoins the second deflection region 13.
  • the end region 18 leads to the means 16 and adjoins the inner housing 4.
  • a thermal barrier coating 20 is arranged on an inner surface 19 of the Aufströmteils 8.
  • the heat-insulating layer 20 results in that the heat transfer for a projection region 21 and a second region 22 is increased and thereby the thermal stresses between the projection region 21 and the second region 22 are reduced.
  • the stress concentration points due to the creep and the reduced temperature gradient are displaced in a region between the second region 22 and a third region 23.
  • the projection area 21 lies essentially in the projection 16, the second area 22 essentially lying at the transition from the second deflection area 13 to the termination area 18 ,
  • the third region 23 lies approximately at the transition in front of the first deflection region 19 to the second deflection region 13.
  • the thermal barrier coating 20 can be arranged on the outer housing 6 via an adhesive layer, which is not shown in detail.
  • Examples of a thermal barrier coating or an adhesive layer and further layers are known from WO 2006/133980 A1 disclosed. The content of WO 2006/133980 A1 is thus fully included in the disclosure of this application.
  • the thermal barrier coating 20 is in this case arranged only on an inner surface of the termination region 18.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)
EP08007703A 2008-04-21 2008-04-21 Boîtier extérieur pour une turbomachine Withdrawn EP2112334A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP08007703A EP2112334A1 (fr) 2008-04-21 2008-04-21 Boîtier extérieur pour une turbomachine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP08007703A EP2112334A1 (fr) 2008-04-21 2008-04-21 Boîtier extérieur pour une turbomachine

Publications (1)

Publication Number Publication Date
EP2112334A1 true EP2112334A1 (fr) 2009-10-28

Family

ID=39884490

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08007703A Withdrawn EP2112334A1 (fr) 2008-04-21 2008-04-21 Boîtier extérieur pour une turbomachine

Country Status (1)

Country Link
EP (1) EP2112334A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102626851A (zh) * 2012-04-27 2012-08-08 上海电气电站设备有限公司 高压导叶持环加工工艺
CN103470320A (zh) * 2013-08-20 2013-12-25 东方电气集团东方汽轮机有限公司 一种双层汽缸结构
CN105114135A (zh) * 2015-09-10 2015-12-02 哈尔滨汽轮机厂有限责任公司 一种亚临界300mw机组低压模块
CN105201568A (zh) * 2015-10-15 2015-12-30 哈尔滨汽轮机厂有限责任公司 一种带有360°蜗壳进气低压内缸的低压汽轮机组

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1541810A1 (fr) * 2003-12-11 2005-06-15 Siemens Aktiengesellschaft Utilisation de revêtement de barrière thermique pour un élément d'une turbine à vapeur et une turbine à vapeur
EP1712745A1 (fr) * 2005-04-14 2006-10-18 Siemens Aktiengesellschaft Elément pour une turbine à vapeur, turbine à vapeur, utilisation et procédé de production d'un tel élément
WO2006133980A1 (fr) 2005-06-13 2006-12-21 Siemens Aktiengesellschaft Systeme de couches conçu pour un composant comprenant une couche d'isolation thermique et une couche metallique anti-erosion, procede de production dudit composant, et procede pour faire fonctionner une turbine a vapeur
WO2007045225A2 (fr) * 2005-10-20 2007-04-26 Forschungszentrum Jülich GmbH Systemes constitues de plusieurs couches d'isolation thermique et procede de fabrication

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1541810A1 (fr) * 2003-12-11 2005-06-15 Siemens Aktiengesellschaft Utilisation de revêtement de barrière thermique pour un élément d'une turbine à vapeur et une turbine à vapeur
EP1712745A1 (fr) * 2005-04-14 2006-10-18 Siemens Aktiengesellschaft Elément pour une turbine à vapeur, turbine à vapeur, utilisation et procédé de production d'un tel élément
WO2006133980A1 (fr) 2005-06-13 2006-12-21 Siemens Aktiengesellschaft Systeme de couches conçu pour un composant comprenant une couche d'isolation thermique et une couche metallique anti-erosion, procede de production dudit composant, et procede pour faire fonctionner une turbine a vapeur
WO2007045225A2 (fr) * 2005-10-20 2007-04-26 Forschungszentrum Jülich GmbH Systemes constitues de plusieurs couches d'isolation thermique et procede de fabrication

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102626851A (zh) * 2012-04-27 2012-08-08 上海电气电站设备有限公司 高压导叶持环加工工艺
CN102626851B (zh) * 2012-04-27 2014-07-02 上海电气电站设备有限公司 高压导叶持环加工工艺
CN103470320A (zh) * 2013-08-20 2013-12-25 东方电气集团东方汽轮机有限公司 一种双层汽缸结构
CN103470320B (zh) * 2013-08-20 2015-04-22 东方电气集团东方汽轮机有限公司 一种双层汽缸结构
CN105114135A (zh) * 2015-09-10 2015-12-02 哈尔滨汽轮机厂有限责任公司 一种亚临界300mw机组低压模块
CN105201568A (zh) * 2015-10-15 2015-12-30 哈尔滨汽轮机厂有限责任公司 一种带有360°蜗壳进气低压内缸的低压汽轮机组

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