EP0345700B1 - Auslassgehäuse einer Strömungsmaschine - Google Patents

Auslassgehäuse einer Strömungsmaschine Download PDF

Info

Publication number: EP0345700B1
Authority: EP; European Patent Office
Prior art keywords: wall; diffusor; housing; distributors; duct
Prior art date: 1988-06-07
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.): Expired - Lifetime

Application number

EP19890110149

Other languages

German (de)

English (en)

French (fr)

Other versions

EP0345700A1 (de

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.)

1988-06-07

Filing date

1989-06-05

Publication date

1992-08-26

1989-06-05 Application filed by Skoda kp filed Critical Skoda kp

1989-12-13 Publication of EP0345700A1 publication Critical patent/EP0345700A1/de

1992-08-26 Application granted granted Critical

1992-08-26 Publication of EP0345700B1 publication Critical patent/EP0345700B1/de

2009-06-05 Anticipated expiration legal-status Critical

Status 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 for turbomachine the type specified in the preamble of claim 1, in which an axial flow is deflected into a flow 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.
an outlet housing for axial turbines is known, in the continuous rear wall of which the turbine shaft is supported.
an arcuate circulation channel is formed, which is delimited on the outside by a semi-cylindrical outer wall adjoining the vertical rear wall and is divided by the radial end flange of the turbine housing.
This approximately semi-cylindrical outer wall merges tangentially into a front wall which is firmly connected to the tubular turbine housing and which, together with the rear wall, delimits a common vertical outflow channel.
a generic outlet housing for a low-pressure axial turbine which surrounds the impeller of the steam turbine and has a housing body, an annular diffuser and a rectilinear outflow duct and a front circulation duct.
the two channels are connected to the widened end of the diffuser, the rear outflow channel delimited by the rear wall and the side walls transversely to the
the longitudinal axis of the housing runs downward and the circulation channel has an arc section which is delimited by the upper housing wall and runs counter to the axial flow direction and which is followed by a channel section parallel to the straight outflow channel.
the steam is deflected radially outward after flowing through the turbine blades, the amount of steam flowing in the upper half of the steam turbine completely or partially flowing into the circulation channel and the amount of steam flowing in the lower turbine half directly entering the rear outflow channel.
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 jacket of the straight channel forms the rear wall of the lower part of the housing body and its inner jacket forms the rear oblique wall, which begins at the lower edge of the diffuser jacket 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 manifold 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 housing dimensions and its outer shape are approximately 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 jacket tube p is larger than the broadening of the core j, so that the circular cross-section of the diffuser d, 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.
Circulation channel II begins in the upper part of the body 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 a plurality of 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 Auslassgehäuse einer Strömungsmaschine Expired - Lifetime EP0345700B1 (de)

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 EP0345700A1 (de)	1989-12-13
EP0345700B1 true EP0345700B1 (de)	1992-08-26

Family

ID=5380750

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
EP19890110149 Expired - Lifetime EP0345700B1 (de)	1988-06-07	1989-06-05	Auslassgehäuse einer Strömungsmaschine

Country Status (3)

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

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US5188510A (en) *	1990-11-21	1993-02-23	Thomas R. Norris	Method and apparatus for enhancing gas turbo machinery flow
US6062814A (en) *	1995-10-31	2000-05-16	Siemens Aktiengesellschaft	Transition element between components of a flue-gas duct of a gas turbine
EP0858551B1 (de) *	1995-10-31	2000-03-22	Siemens Aktiengesellschaft	Übergangselement zwischen komponenten des rauchgaskanals einer gasturbine
FR2757210B1 (fr) *	1996-12-12	1999-01-22	Hispano Suiza Sa	Echappement centrifuge de turbine a deflecteur cambre
SE509521C2 (sv) *	1997-06-05	1999-02-08	Abb Stal Ab	Utloppsanordning för en strömningsmaskin
CN1089136C (zh) *	1997-10-17	2002-08-14	Entek股份有限公司	蒸气涡轮机排气管
WO1999051858A1 (de)	1998-04-06	1999-10-14	Siemens Aktiengesellschaft	Dampfturbine
RU2209319C2 (ru) *	1999-12-14	2003-07-27	Открытое акционерное общество Научно-производственное объединение "Искра"	Выхлопная улитка газотурбинной установки
JP4557787B2 (ja) *	2005-04-28	2010-10-06	株式会社東芝	蒸気タービン
EP1892384A1 (de) *	2006-08-25	2008-02-27	Siemens Aktiengesellschaft	Diffusor für eine Dampfturbine
EP1992789A1 (de) *	2007-05-18	2008-11-19	ABB Turbo Systems AG	Gasaustrittsgehäuse einer Abgasturbine mit einem Stützelement
CZ302698B6 (cs) *	2009-05-19	2011-09-07	Ceské vysoké ucení technické v Praze	Prechodový díl lopatkového stroje

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
NL191037A (cs) *	1953-10-23
US3149470A (en) *	1962-08-29	1964-09-22	Gen Electric	Low pressure turbine exhaust hood
DE2707860A1 (de) *	1977-02-24	1978-08-31	Maschf Augsburg Nuernberg Ag	Stroemungsmaschine fuer gasfoermige medien mit einem waermetauscher
JPS5566605A (en) *	1978-11-14	1980-05-20	Toshiba Corp	Exhaust casing for steam turbine

1988
- 1988-06-07 CS CS392788A patent/CS272676B1/cs unknown
1989
- 1989-06-05 DE DE8989110149T patent/DE58902123D1/de not_active Expired - Fee Related
- 1989-06-05 EP EP19890110149 patent/EP0345700B1/de not_active Expired - Lifetime

Also Published As

Publication number	Publication date
DE58902123D1 (de)	1992-10-01
EP0345700A1 (de)	1989-12-13
CS392788A1 (en)	1990-06-13
CS272676B1 (en)	1991-02-12

Legal Events

Date	Code	Title	Description
1989-10-28	PUAI	Public reference made under article 153(3) epc to a published international application that has entered the european phase	Free format text: ORIGINAL CODE: 0009012
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1991-05-02	17Q	First examination report despatched	Effective date: 19910318
1992-07-10	GRAA	(expected) grant	Free format text: ORIGINAL CODE: 0009210
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1992-09-18	ITF	It: translation for a ep patent filed
1992-09-23	GBT	Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
1992-10-01	REF	Corresponds to:	Ref document number: 58902123 Country of ref document: DE Date of ref document: 19921001
1992-10-02	ET	Fr: translation filed
1993-06-26	PLBE	No opposition filed within time limit	Free format text: ORIGINAL CODE: 0009261
1993-06-26	STAA	Information on the status of an ep patent application or granted ep patent	Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT
1993-08-18	26N	No opposition filed
1995-01-31	EAL	Se: european patent in force in sweden	Ref document number: 89110149.5
1996-05-28	PGFP	Annual fee paid to national office [announced via postgrant information from national office to epo]	Ref country code: GB Payment date: 19960528 Year of fee payment: 8
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2005-06-05	PG25	Lapsed in a contracting state [announced via postgrant information from national office to epo]	Ref country code: IT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED. Effective date: 20050605

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