EP0965732A1 - Anneau de sertissage avec prise de vapeur pour turbine - Google Patents

Anneau de sertissage avec prise de vapeur pour turbine Download PDF

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Publication number
EP0965732A1
EP0965732A1 EP98810543A EP98810543A EP0965732A1 EP 0965732 A1 EP0965732 A1 EP 0965732A1 EP 98810543 A EP98810543 A EP 98810543A EP 98810543 A EP98810543 A EP 98810543A EP 0965732 A1 EP0965732 A1 EP 0965732A1
Authority
EP
European Patent Office
Prior art keywords
inner housing
shrink ring
ring
steam turbine
turbine
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.)
Granted
Application number
EP98810543A
Other languages
German (de)
English (en)
Other versions
EP0965732B1 (fr
Inventor
Peter Graf
Tihomir Stojkovic'
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.)
General Electric Switzerland GmbH
Original Assignee
ABB Alstom Power Switzerland Ltd
ABB Asea Brown Boveri Ltd
Asea Brown Boveri AB
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 ABB Alstom Power Switzerland Ltd, ABB Asea Brown Boveri Ltd, Asea Brown Boveri AB filed Critical ABB Alstom Power Switzerland Ltd
Priority to EP98810543A priority Critical patent/EP0965732B1/fr
Priority to DE59808462T priority patent/DE59808462D1/de
Priority to CNB991080297A priority patent/CN1246571C/zh
Priority to US09/328,433 priority patent/US6203271B1/en
Priority to JP11165616A priority patent/JP2000054806A/ja
Publication of EP0965732A1 publication Critical patent/EP0965732A1/fr
Application granted granted Critical
Publication of EP0965732B1 publication Critical patent/EP0965732B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F01D25/24—Casings; Casing parts, e.g. diaphragms, casing fastenings
    • F01D25/26—Double casings; Measures against temperature strain in casings

Definitions

  • the invention relates to a high-pressure or medium-pressure turbine as a single machine or a combined high-pressure medium-pressure turbine with a lower and upper part existing inner housing and an outer housing, and in particular one Connection of these parts of the inner housing by means of shrink rings and a Tapping to discharge steam from the turbine into a pipeline to one apparatus standing outside the turbine.
  • a tap slot is arranged on the outer contour of the blade duct of the turbine, which leads through the inner housing into the space between the inner and outer housing.
  • the steam flows from the turbine blade vane through the bleed slot and is collected in a sealed annulus formed over the bleed slot by a molded bleed ring in the form of a tire on the outer surface of the inner casing. This is sealingly attached to the inner housing.
  • a pipe socket is arranged on the ring, which leads through the outer housing to the outside and to which a pipe is connected which leads to a feed water preheater, boiler or other heating apparatus.
  • the shrink rings and the tapping ring are each fixed to the inner housing by several bolts and screws, so that the rings cannot move with respect to the housing.
  • a disadvantage of this prior art is that the tapping and the holding together of the inner housing by means of shrink rings in the area of the tapping and several components and small parts are required, which are manufactured and assembled individually.
  • the production of a cast tapping ring requires several manufacturing steps. For the many components and small parts required, there is ultimately a long manufacturing and assembly time and the resulting high costs.
  • a steam turbine according to the preamble of claim 1, which has a shrink ring in the region of the tapping, which is arranged above the tapping slot of the turbine and, at the location of the tapping slot, has a semi-open cavity facing the inner housing, the cavity together with the outer surface of the inner housing forms an annular space in which the bleed steam flowing through the bleed slot collects.
  • the shrink ring is flat on both sides of the cavity so that its contours match those of the inner housing.
  • the shrink ring thus combines the function of both the shrink ring and the tap ring in a single part and is referred to here as a combined shrink ring tap ring.
  • the shrink ring has an opening for a removal nozzle, which leads sealingly through the outer housing to a pipeline.
  • the advantage of the combined shrink ring according to the invention is that it consists of a single component, which has both functions, that of holding the turbine housing parts together and that of forming a collecting space for bleed steam from the turbine. Instead of several parts as in the prior art described at the outset, only one part has to be manufactured and assembled for these two functions.
  • the combined shrink ring tap ring according to the invention is rotated in one operation by means of a forging sleeve. Because only a large part has to be produced instead of several parts, the production time is significantly reduced. In particular, castings that require several costly work steps are no longer necessary. The assembly time is also reduced because only one part has to be assembled instead of several parts. Finally, the number of small parts, such as axial fixings, is considerably reduced, which saves further time during assembly.
  • FIG. 1 shows a steam turbine 1 with a tapping ring and shrink ring according to the prior art. It has a shaft 2 and a blade duct 3, with moving blades 4 and guide blades 5.
  • the steam turbine 1 is enclosed by an inner casing 6 and an outer casing 7.
  • On the outer contour of the blade duct 3, the steam turbine has a tap slot 8 which leads through 360 ° through the inner housing 6 into the space between the inner and outer housing 6, 7.
  • the inner housing 6 is held together along the tapping slot 8 by a plurality of ribs 9 distributed around the circumference, one of which is indicated in the figure with a broken line.
  • a cast tapping ring 11 in the form of a tire is arranged on the outer surface of the inner housing 6 at the height of the tapping slot 8, a closed, tight annular space 10 being formed above the tapping slot 8 by the tapping ring 11 and the inner housing 6.
  • the tapping ring 11 is fixed to the inner housing 6 by retaining rings 12.
  • the inner housing 6 is also held together by a plurality of shrink rings 14.
  • FIG. 2 shows a steam turbine 1 of a type similar to that described in FIG. 1 but with the combined shrink ring tapping ring according to the invention.
  • the combined shrink ring tapping ring 20 consists of a single forged part. On the sides 21, the inside of the shrink ring 20 is flat and adapted to the outer surface of the inner housing 6, so that the ring 20 seals against the inner housing during the shrinking. In the middle, the combined shrink ring tapping ring 20 has a semi-open cavity on the side facing the inner housing 6.
  • the ring 20 is pushed over the inner housing 6 of the turbine and arranged in such a way that the cavity comes to lie over the tapping slot 8.
  • the cavity with the outer surface of the inner housing 6 forms a free annular space 10 above the tap slot 8.
  • the steam flows through the tap slot 8 and collects and distributes in the annular space 10.
  • the cavity has a round cross section in the embodiment shown .
  • Other cross sections, such as square cross sections, are also conceivable here. However, a round cross-section is more favorable considering the flow through the annulus to the pipeline leading out of the turbine.
  • the outer contour has a curvature 23, which forms a type of bridge from one side part 21 of the combined shrink ring to the other side part 21.
  • the curved shape makes the shrink ring more flexible, which is advantageous in the case of the thermal expansions of the inner housing 6.
  • the straight outer contour of the combined shrink ring tapping ring 20 is also conceivable and would be simpler in terms of production technology.
  • the curvature 23 is somewhat more complex to produce in comparison.
  • FIG. 3 shows a further view of the combined shrink ring tapping ring 20.
  • the bulge 23 the cavity on the inside and the flat parts 21 on the sides of the ring are shown in the middle of the ring 20.
  • an opening 22 is arranged in the lower region, which is used to mount a tapping nozzle 24 for guiding the bleed steam through the outer housing.
  • the opening 22 is designed such that the removal nozzle 24 can be arranged vertically. A vertical arrangement simplifies installation through the outer housing.
  • the opening is preferably located in the lower region of the shrink ring tapping ring 20, so that any condensate can run out. However, an opening in the upper area is also conceivable.
  • the extraction nozzle 24 is arranged in Figure 3 slightly offset from the lowest point on the ring.
  • the extraction nozzle 24 is expediently designed such that the flow from the annular space 10 into the extraction nozzle 24 is favored as much as possible.
  • both the diameter of the extraction nozzle is at least equal to the width of the cavity and the end of the extraction nozzle is adapted to the contours of the annular space so that no edges protrude into the annular space.
  • the tapping nozzle is welded to the inner housing in a sealing manner. In an alternative embodiment, this connection is realized by screwing or jamming.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)
EP98810543A 1998-06-15 1998-06-15 Anneau de sertissage avec prise de vapeur pour turbine Expired - Lifetime EP0965732B1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
EP98810543A EP0965732B1 (fr) 1998-06-15 1998-06-15 Anneau de sertissage avec prise de vapeur pour turbine
DE59808462T DE59808462D1 (de) 1998-06-15 1998-06-15 Schrumpfring für Turbine mit Anzapfung
CNB991080297A CN1246571C (zh) 1998-06-15 1999-06-08 用于抽汽式涡轮机的收缩环
US09/328,433 US6203271B1 (en) 1998-06-15 1999-06-09 Shrink ring for turbine with bleeding
JP11165616A JP2000054806A (ja) 1998-06-15 1999-06-11 タ―ビンのための抽出手段を有する収縮リング

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP98810543A EP0965732B1 (fr) 1998-06-15 1998-06-15 Anneau de sertissage avec prise de vapeur pour turbine

Publications (2)

Publication Number Publication Date
EP0965732A1 true EP0965732A1 (fr) 1999-12-22
EP0965732B1 EP0965732B1 (fr) 2003-05-21

Family

ID=8236134

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98810543A Expired - Lifetime EP0965732B1 (fr) 1998-06-15 1998-06-15 Anneau de sertissage avec prise de vapeur pour turbine

Country Status (5)

Country Link
US (1) US6203271B1 (fr)
EP (1) EP0965732B1 (fr)
JP (1) JP2000054806A (fr)
CN (1) CN1246571C (fr)
DE (1) DE59808462D1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1744017A1 (fr) * 2005-07-14 2007-01-17 Siemens Aktiengesellschaft Turbine combinée à vapeur et procédé de fonctionnement d'une turbine combinée à vapeur
US7402024B2 (en) 2005-02-16 2008-07-22 Alstom Technology Ltd. Steam turbine
EP2101042A1 (fr) * 2008-03-10 2009-09-16 Siemens Aktiengesellschaft Turbine à vapeur dotée de frettes

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6337861B1 (en) * 1999-02-02 2002-01-08 Cisco Technology, Inc. Method and apparatus to properly route ICMP messages in a tag-switching network
US7729267B2 (en) * 2003-11-26 2010-06-01 Cisco Technology, Inc. Method and apparatus for analyzing a media path in a packet switched network
US7738383B2 (en) * 2006-12-21 2010-06-15 Cisco Technology, Inc. Traceroute using address request messages
US7706278B2 (en) * 2007-01-24 2010-04-27 Cisco Technology, Inc. Triggering flow analysis at intermediary devices
US20130078089A1 (en) * 2011-09-26 2013-03-28 General Electric Company Steam turbine single shell extraction lp casing
CN103422916B (zh) * 2013-08-30 2015-09-30 上海电气电站设备有限公司 汽轮机的抽、补汽通道结构
CN105626168B (zh) * 2016-02-26 2017-09-15 上海发电设备成套设计研究院 汽轮机红套环高压内缸的严密性监控方法及系统
CN105756724B (zh) * 2016-02-26 2017-09-22 上海发电设备成套设计研究院 汽轮机红套环与高压内缸红套紧力的监控方法及系统

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB600025A (en) * 1945-04-13 1948-03-30 Power Jets Res & Dev Ltd Improvements in and relating to casings for turbines, compressors and the like
FR2323904A1 (fr) * 1975-09-11 1977-04-08 Carrier Corp Bague de compensation pour machine tournante

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB600025A (en) * 1945-04-13 1948-03-30 Power Jets Res & Dev Ltd Improvements in and relating to casings for turbines, compressors and the like
FR2323904A1 (fr) * 1975-09-11 1977-04-08 Carrier Corp Bague de compensation pour machine tournante

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7402024B2 (en) 2005-02-16 2008-07-22 Alstom Technology Ltd. Steam turbine
EP1744017A1 (fr) * 2005-07-14 2007-01-17 Siemens Aktiengesellschaft Turbine combinée à vapeur et procédé de fonctionnement d'une turbine combinée à vapeur
WO2007006754A1 (fr) 2005-07-14 2007-01-18 Siemens Aktiengesellschaft Turbine a vapeur combinee, ensemble de turbines a vapeur ou de turbines a gaz et a vapeur et procede pour faire fonctionner une turbine a vapeur combinee
EP2101042A1 (fr) * 2008-03-10 2009-09-16 Siemens Aktiengesellschaft Turbine à vapeur dotée de frettes

Also Published As

Publication number Publication date
EP0965732B1 (fr) 2003-05-21
JP2000054806A (ja) 2000-02-22
US6203271B1 (en) 2001-03-20
CN1246571C (zh) 2006-03-22
DE59808462D1 (de) 2003-06-26
CN1239178A (zh) 1999-12-22

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