EP0345700A1 - Carter d'échappement pour turbomachine - Google Patents

Carter d'échappement pour turbomachine Download PDF

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Publication number
EP0345700A1
EP0345700A1 EP89110149A EP89110149A EP0345700A1 EP 0345700 A1 EP0345700 A1 EP 0345700A1 EP 89110149 A EP89110149 A EP 89110149A EP 89110149 A EP89110149 A EP 89110149A EP 0345700 A1 EP0345700 A1 EP 0345700A1
Authority
EP
European Patent Office
Prior art keywords
diffuser
housing body
wall
housing
outflow channel
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
EP89110149A
Other languages
German (de)
English (en)
Other versions
EP0345700B1 (fr
Inventor
Miroslav Dipl.-Ing. Stastny
Jiri Prof. Dr. Sc. Dipl.-Ing. Nozicka
Slavomir Doz. Dipl.-Ing. Jirku
Jiri Dipl.-Ing. Hobzik
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.)
Skoda kp
Original Assignee
Skoda kp
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 Skoda kp filed Critical Skoda kp
Publication of EP0345700A1 publication Critical patent/EP0345700A1/fr
Application granted granted Critical
Publication of EP0345700B1 publication Critical patent/EP0345700B1/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
    • F01D25/30—Exhaust heads, chambers, or the like

Definitions

  • the invention relates to an outlet housing of a turbomachine, in which an axially directed inflow changes into an outflow perpendicular to the machine axis.
  • the invention is particularly suitable for outlet casings of steam turbines which are arranged between the last stage of the steam turbine and the condenser.
  • outlet housings which contain an axisymmetric diffuser and a voluminous housing which merges into an inlet port of the condenser.
  • the housing contains a cylinder wall, the surface lines of which are parallel to the machine axis. The flowing medium was found to be the Housing walls do not flow smoothly, but extensive vortices arise, which leads to considerable energy losses.
  • Another known outlet housing has two opposite outlets through which the steam flows into two independent condensers. This outlet housing results in lower energy losses, but for the price of a considerable outlay due to the two capacitors required and their accommodation in the machine room.
  • the object of the invention is to provide an outlet housing for turbomachines which ensures reduced energy losses with relatively little technical effort.
  • the outlet housing for turbomachines contains a body, a circular diffuser, walls and partitions.
  • the body includes a straight channel through which approximately one half of the steam flows and a bypass channel of constant width which guides the remaining steam flow around the circular diffuser in the same direction in which the steam flows in the straight channel.
  • the straight channel begins in accordance with the flow through the circular diffuser at the location immediately behind the transverse axis of the diffuser and leads towards its center towards the lower part of the body and occupies the rear portion of this lower part of the body.
  • the bypass channel begins next to the straight channel at the end of the diffuser and leads in an upward direction and against the direction of flow in the diffuser Elbow in a straight channel section, which opens into a common discharge channel arranged transversely to the machine axis.
  • the outer jacket of the circulation channel thus forms part of the upper part of the rear wall of the housing body, to which the outer cylinder wall connects, which connects to the front wall of the housing body.
  • the inner jacket of the circulation channel forms a convex wall in the upper part of the housing body, which connects to the upper edge of the diffuser jacket and merges into an inclined wall, which gradually leads back and connects to a vertical partition in the lower part of the housing body in the immediate vicinity of the transverse axis of the diffuser, which separates the front portion of the housing body from the rear.
  • the outer casing of the straight channel forms the rear wall of the lower part of the housing body and its inner casing forms the rear oblique wall, which begins at the lower edge of the diffuser casing near the transverse plane of the diffuser and is connected to the opposite edge of the partition or partition, which separates the rear section from the front section of the housing body.
  • the side jacket of the straight channel and the circulation channel forms the right and left side wall of the housing body.
  • One embodiment of the invention contains dividers in the straight channel and the circulation channel, the common edges of the first manifold being connected to one another and also the common edge of the second distributor being connected to one another. These connections are connected at the opposite points of the diffuser jacket, namely horizontally in the immediate vicinity of the transverse axis of the diffuser.
  • the distributors are connected with their outer edges to the side walls of the housing body so that the individual distributors are concave with respect to the vertical axis of this body.
  • a pair of streamlined baffles or dividing walls are arranged horizontally in the circulation channel at opposite points of the diffuser jacket immediately behind its transverse axis, the opposite edges of which are connected to one another in the vertical axis of the housing body.
  • the vertical baffles can expediently be inserted between the streamlined partition walls and the side walls of the body of the outlet housing.
  • An advantage of the outlet housing according to the invention is the substantial reduction in the wake and swirl areas, which leads to a substantial reduction in the energy losses of the turbomachine. Another advantage is that the original dimensions of the housing and its external shape are roughly preserved.
  • the housing according to the invention is produced from the shaped sheets.
  • the illustrated outlet housing for a turbomachine contains a body 01 which is rectangular in elevation and a circular diffuser d.
  • the circular diffuser d consists of a trumpet-shaped jacket tube p open at the rear and a core j with a widened end part.
  • the opening of the casing tube p is larger than the broadening of the core j, so that the circular cross-section of the diffuser d, which is delimited by both, widens towards the rear.
  • the widened end of the core j is connected to the inside of the rear wall 100 of the body 01.
  • the body 01 of the outlet housing is only supposed to be distributed vertically on the upper part H and the lower part D.
  • the dividing line 14 between the upper part H and the lower part D runs below parallel or in alignment with the transverse axis z of the diffuser d.
  • This assumed dividing line is an extension of the fictitious dividing plane between the proportion of steam flowing through the diffuser d into a straight duct I and the quantity of steam flowing into a circulation duct II.
  • a distribution of the steam flow exists in every diffuser of flow machines of this type.
  • the length D of the lower part D of the body 01 is divided by a partition 8 into two equal halves, ie into a rear section Z and a front section P.
  • the straight channel I is accommodated in such a way that a rear oblique wall 4 is connected to the lower edge d2 of the diffuser d, which begins at the dividing line 14 and leads to the dividing wall 8.
  • the circulation channel II begins in the upper part of the Kör pers 01, the outer cylinder wall 5 being connected to its end wall 100, the bending diameter of which corresponds to the sum of the width of the rear and front sections Z, P.
  • the cylinder wall 5 merges into the front wall 200 of the body 01.
  • the inner jacket of the circulation channel II forms a convex wall 7, which begins in the dividing line 14 and is connected to the upper end edge d1 of the diffuser d.
  • 3 and 4 are in the straight channel I and the circulation channel II, in the immediate vicinity of the transverse axis z of the diffuser d, ie in the dividing line 14, two common edges 12, 13 of a first distributor 1 and a second Distributor 2 housed vertically and against each other and connected there to the outer jacket p of the circular diffuser d.
  • These distributors 1, 2 are connected to the side walls 3, 6 via outer edges.
  • the first and the second distributors 1, 2 are arcuate concave to the vertical axis x of the body 01.
  • the steam flow from the last stage of the turbomachine enters the circular diffuser d and divides into a back through the straight channel 100 z. B. to the capacitors flowing lower part and in an upper partial flow, which is turned by the upper edge d1 of the diffuser, the convex wall 7 and the outer cylinder wall 7 and then guided along the casing tube p into the circulation channel II. Both steam parts then flow in the same direction in channels I and II.
  • the distribution of the steam flow on the upper and lower flow is supported by distributors 1 and 2, on the surfaces of which the steam flows smoothly and does not form any eddies.
  • the rear sloping wall 4 also essentially follows the streamlines of the steam and supports its uniform, continuous flow.
  • the front sloping wall 11 in the circulation channel serves the same purpose.
  • the two streamlined partitions 9 eliminate the risk of swirling in the area behind the lower edge d2 of the diffuser d and their streamlined shape also improves the swirl-free continuous steam flow.
  • the baffles 10 reduce the swirl of the fluid by dividing the flow width into several narrower flows. The use of guide elements and / or partitions is matched to the characteristics of the respective turbomachine.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)
EP19890110149 1988-06-07 1989-06-05 Carter d'échappement pour turbomachine Expired - Lifetime EP0345700B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CS3927/88 1988-06-07
CS392788A CS272676B1 (en) 1988-06-07 1988-06-07 Outlet branch for bladed machine

Publications (2)

Publication Number Publication Date
EP0345700A1 true EP0345700A1 (fr) 1989-12-13
EP0345700B1 EP0345700B1 (fr) 1992-08-26

Family

ID=5380750

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19890110149 Expired - Lifetime EP0345700B1 (fr) 1988-06-07 1989-06-05 Carter d'échappement pour turbomachine

Country Status (3)

Country Link
EP (1) EP0345700B1 (fr)
CS (1) CS272676B1 (fr)
DE (1) DE58902123D1 (fr)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0558652A1 (fr) * 1990-11-21 1993-09-08 Norlock Technologies, Inc. Procede et appareil servant a ameliorer l'efficacite de l'ecoulement dans des turbo-moteurs a gaz
WO1997016628A2 (fr) * 1995-10-31 1997-05-09 Siemens Aktiengesellschaft Element de transition entre des elements constitutifs du canal de gaz brules d'une turbine a gaz
FR2757210A1 (fr) * 1996-12-12 1998-06-19 Hispano Suiza Sa Echappement centrifuge de turbine a deflecteur cambre
WO1998055739A1 (fr) * 1997-06-05 1998-12-10 Abb Stal Ab Dispositif d'evacuation destine a une machine a circulation de flux
WO1999020874A1 (fr) * 1997-10-17 1999-04-29 Zakrytoe Aktsionernoe Obschestvo 'entek' Conduit d'evacuation pour turbine a vapeur
WO1999051858A1 (fr) 1998-04-06 1999-10-14 Siemens Aktiengesellschaft Turbine a vapeur
US6062814A (en) * 1995-10-31 2000-05-16 Siemens Aktiengesellschaft Transition element between components of a flue-gas duct of a gas turbine
JP2006307738A (ja) * 2005-04-28 2006-11-09 Toshiba Corp 蒸気タービン
EP1892384A1 (fr) * 2006-08-25 2008-02-27 Siemens Aktiengesellschaft Diffuseur pour une turbine à vapeur
EP1992789A1 (fr) * 2007-05-18 2008-11-19 ABB Turbo Systems AG Carter de turbine à gas d'échappement comprenant un élément de support

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CZ302698B6 (cs) * 2009-05-19 2011-09-07 Ceské vysoké ucení technické v Praze Prechodový díl lopatkového stroje

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1110063A (fr) * 1953-10-23 1956-02-06 Licentia Gmbh Diffuseur annulaire placé avant la chambre d'échappement de la vapeur ou du gaz d'une turbine à vapeur ou à gaz
US3149470A (en) * 1962-08-29 1964-09-22 Gen Electric Low pressure turbine exhaust hood
FR2381907A1 (fr) * 1977-02-24 1978-09-22 Maschf Augsburg Nuernberg Ag Turbomachine pour fluides gazeux avec echangeur de chaleur
US4326832A (en) * 1978-11-14 1982-04-27 Tokyo Shibaura Denki Kabushiki Kaisha Exhaust outer casing

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1110063A (fr) * 1953-10-23 1956-02-06 Licentia Gmbh Diffuseur annulaire placé avant la chambre d'échappement de la vapeur ou du gaz d'une turbine à vapeur ou à gaz
US3149470A (en) * 1962-08-29 1964-09-22 Gen Electric Low pressure turbine exhaust hood
FR2381907A1 (fr) * 1977-02-24 1978-09-22 Maschf Augsburg Nuernberg Ag Turbomachine pour fluides gazeux avec echangeur de chaleur
US4326832A (en) * 1978-11-14 1982-04-27 Tokyo Shibaura Denki Kabushiki Kaisha Exhaust outer casing

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0558652A4 (fr) * 1990-11-21 1994-01-19 Thomas R. Norris
EP0558652A1 (fr) * 1990-11-21 1993-09-08 Norlock Technologies, Inc. Procede et appareil servant a ameliorer l'efficacite de l'ecoulement dans des turbo-moteurs a gaz
US6062814A (en) * 1995-10-31 2000-05-16 Siemens Aktiengesellschaft Transition element between components of a flue-gas duct of a gas turbine
WO1997016628A2 (fr) * 1995-10-31 1997-05-09 Siemens Aktiengesellschaft Element de transition entre des elements constitutifs du canal de gaz brules d'une turbine a gaz
WO1997016628A3 (fr) * 1995-10-31 1997-07-03 Siemens Ag Element de transition entre des elements constitutifs du canal de gaz brules d'une turbine a gaz
FR2757210A1 (fr) * 1996-12-12 1998-06-19 Hispano Suiza Sa Echappement centrifuge de turbine a deflecteur cambre
WO1998055739A1 (fr) * 1997-06-05 1998-12-10 Abb Stal Ab Dispositif d'evacuation destine a une machine a circulation de flux
US6231304B1 (en) 1997-06-05 2001-05-15 Abb Stal Ab Outlet device for a flow machine
WO1999020874A1 (fr) * 1997-10-17 1999-04-29 Zakrytoe Aktsionernoe Obschestvo 'entek' Conduit d'evacuation pour turbine a vapeur
CN1089136C (zh) * 1997-10-17 2002-08-14 Entek股份有限公司 蒸气涡轮机排气管
WO1999051858A1 (fr) 1998-04-06 1999-10-14 Siemens Aktiengesellschaft Turbine a vapeur
JP2002510769A (ja) * 1998-04-06 2002-04-09 シーメンス アクチエンゲゼルシヤフト 蒸気タービン
JP2006307738A (ja) * 2005-04-28 2006-11-09 Toshiba Corp 蒸気タービン
JP4557787B2 (ja) * 2005-04-28 2010-10-06 株式会社東芝 蒸気タービン
EP1892384A1 (fr) * 2006-08-25 2008-02-27 Siemens Aktiengesellschaft Diffuseur pour une turbine à vapeur
EP1992789A1 (fr) * 2007-05-18 2008-11-19 ABB Turbo Systems AG Carter de turbine à gas d'échappement comprenant un élément de support
WO2008142044A2 (fr) * 2007-05-18 2008-11-27 Abb Turbo Systems Ag Enveloppe de turbine
WO2008142044A3 (fr) * 2007-05-18 2009-11-19 Abb Turbo Systems Ag Enveloppe de turbine

Also Published As

Publication number Publication date
CS272676B1 (en) 1991-02-12
EP0345700B1 (fr) 1992-08-26
CS392788A1 (en) 1990-06-13
DE58902123D1 (de) 1992-10-01

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