EP0280205B1 - Compresseur radial - Google Patents

Compresseur radial Download PDF

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Publication number
EP0280205B1
EP0280205B1 EP88102419A EP88102419A EP0280205B1 EP 0280205 B1 EP0280205 B1 EP 0280205B1 EP 88102419 A EP88102419 A EP 88102419A EP 88102419 A EP88102419 A EP 88102419A EP 0280205 B1 EP0280205 B1 EP 0280205B1
Authority
EP
European Patent Office
Prior art keywords
diffuser
slots
radial
blades
radial compressor
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.)
Expired - Lifetime
Application number
EP88102419A
Other languages
German (de)
English (en)
Other versions
EP0280205A3 (en
EP0280205A2 (fr
Inventor
Friedrich Wilhelm Dipl.Ing. Benfer
Gernot Dipl.-Ing. Eisenlohr
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.)
KHD LUFTFAHRTTECHNIK GMBH
Original Assignee
BMW Rolls Royce GmbH
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 BMW Rolls Royce GmbH filed Critical BMW Rolls Royce GmbH
Publication of EP0280205A2 publication Critical patent/EP0280205A2/fr
Publication of EP0280205A3 publication Critical patent/EP0280205A3/de
Application granted granted Critical
Publication of EP0280205B1 publication Critical patent/EP0280205B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/44—Fluid-guiding means, e.g. diffusers
    • F04D29/441—Fluid-guiding means, e.g. diffusers especially adapted for elastic fluid pumps
    • F04D29/444—Bladed diffusers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D21/00—Pump involving supersonic speed of pumped fluids
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
    • F04D29/68—Combating cavitation, whirls, noise, vibration or the like; Balancing by influencing boundary layers
    • F04D29/681—Combating cavitation, whirls, noise, vibration or the like; Balancing by influencing boundary layers especially adapted for elastic fluid pumps

Definitions

  • the invention relates to a radial compressor according to the preamble of claim 1.
  • the object of the invention is to stabilize the compression surges occurring in certain operating areas on the flow inlet side of the radial guide vane ring and to reduce their effects on the characteristic diagram.
  • the blades of the radial guide vane ring alternately have two different lengths and the slots are arranged at least approximately at right angles in front of the short blades and extend to the side next to the front edge of the blade of the nearest long blades. It is generally known that a radial guide vane ring inserted into the diffuser of a radial compressor has an effect on the surge limit of the radial compressor. It has proven advantageous to manufacture the blades of the radial guide vane ring alternately with two different lengths in the case of highly loaded radial compressors.
  • a compression shock occurs at least on the leading edge of the short stator vanes.
  • the lossy back and forth movement of the compression shock, caused by transient outflow from the impeller, is reduced or avoided by the configuration according to the invention.
  • the slots arranged at least approximately at right angles to the blades (and accordingly also approximately at right angles to the flow) connect the diffuser to at least one storage space arranged behind the diffuser channel wall.
  • the slots are advantageously incorporated into both opposite diffuser channel walls and correspondingly connected to annular storage spaces arranged on both sides of the diffuser channel walls.
  • the two annular storage spaces are combined to form a coherent annular space.
  • the two storage spaces are subdivided into individual segments which are partitioned off from one another, a segment being assigned to each slot.
  • This special design of the storage rooms depends on the Design of the respective radial compressor.
  • the inventive design and arrangement of the slots and the storage spaces behind them keep the radial compressor in a stable working area because the map width of the radial compressor increases due to the partial reduction of the compression surges.
  • the impeller 1 of a radial compressor shown in part, is fastened on a shaft designated by the center line 2.
  • the impeller 1 conveys the air flow 3 entering the radial compressor into a diffuser 4, which is composed of an unbladed diffuser 4a and a bladed diffuser 4b.
  • a diffuser 4 which is composed of an unbladed diffuser 4a and a bladed diffuser 4b.
  • the Diffuser channel walls 5, 6 are incorporated into slots 7a, 7b, which connect the diffuser channel 4 to storage spaces 8, 9 arranged on both sides of the diffuser channel wall 5, 6 and surrounding the diffuser channel 4 in a ring shape.
  • Fig. 2 it can be seen that the blades 9, 10 of the radial guide vane ring 11 are alternately different lengths (short blade 9; long blade 10). Slits 7a are arranged almost at right angles to the leading edge of the blade in front of the short blades 9 and extend laterally next to the leading edge 10a of the blade.
  • the map shown in FIG. 3 (solid lines) is that of a conventional radial compressor in the event of a faulty flow to the radial compressor and thus to the radial guide vane ring 11, i.e. without specially arranged slots 7a, 7b and without storage spaces 8a, 8b arranged behind it.
  • a characteristic field expansion is achieved, the size of which is defined by the proportion b1 (dashed line delimitation of the characteristic field).
  • a similar characteristic curve field is shown in FIG. 4, with an undisturbed inflow being assumed in this characteristic field.
  • a characteristic extension by the dimension b2 can be achieved by applying the invention.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Claims (1)

  1. Compresseur radial avec un diffuseur (4, 4a,4b) intercalé après la roue mobile (1), des lumières (7a, 7b) étant usinées dans au moins une paroi du canal du diffuseur (5, 6), lumières qui relient le diffuseur (4, 4a, 4b) à au moins un espace de réserve (8a, 8b) placé derrière la paroi du canal de diffuseur (5, 6), le diffuseur (4) étant associé à une couronne d'aubes directrices radiales (11) et les lumières (7a, 7b) étant disposées du côté de l'entrée du flux de la couronne d'aubes directrices radiales, caractérisé en ce que les aubes (9, 10) de la couronne d'aubes directrices radiales (11) comportent alternativement deux longueurs différentes et les lumières (7a, 7b) sont placées au moins approximativement à angle droit devant les aubes courtes (9) et s'étendent latéralement près des arêtes avant (10a) d'une aube longue au moins contigu.
EP88102419A 1987-02-19 1988-02-19 Compresseur radial Expired - Lifetime EP0280205B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19873705307 DE3705307A1 (de) 1987-02-19 1987-02-19 Radialverdichter
DE3705307 1987-02-19

Publications (3)

Publication Number Publication Date
EP0280205A2 EP0280205A2 (fr) 1988-08-31
EP0280205A3 EP0280205A3 (en) 1989-08-02
EP0280205B1 true EP0280205B1 (fr) 1991-05-08

Family

ID=6321337

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88102419A Expired - Lifetime EP0280205B1 (fr) 1987-02-19 1988-02-19 Compresseur radial

Country Status (2)

Country Link
EP (1) EP0280205B1 (fr)
DE (2) DE3705307A1 (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19814627C2 (de) * 1998-04-01 2001-02-22 Man Turbomasch Ag Ghh Borsig Kühlluftentnahme aus dem Diffusorteil eines Kompressors einer Gasturbine
DE19817705C2 (de) * 1998-04-21 2001-02-15 Man Turbomasch Ag Ghh Borsig Kühlluftentnahme aus dem Diffusorteil eines Kompressors einer Gasturbine
EP1710442A1 (fr) 2005-04-04 2006-10-11 ABB Turbo Systems AG Système de stabilisation de courant pour compresseur radial
DE102008044505B4 (de) 2008-09-08 2010-07-01 Friedrich-Alexander-Universität Erlangen-Nürnberg Radialverdichter
CN102506029B (zh) * 2011-12-29 2014-04-16 中联重科股份有限公司 一种离心风机叶轮及离心风机
US20130280060A1 (en) * 2012-04-23 2013-10-24 Shakeel Nasir Compressor diffuser having vanes with variable cross-sections
DE102016201256A1 (de) * 2016-01-28 2017-08-03 Siemens Aktiengesellschaft Strömungsmaschine mit beschaufeltem Diffusor
DE102017203230A1 (de) 2017-02-28 2018-08-30 Siemens Aktiengesellschaft Diffusor
EP3589822A4 (fr) * 2017-03-03 2020-12-09 Elliott Company Procédé et agencement pour minimiser le bruit et l'excitation de structures dues à des modes acoustiques de cavité
IT202000001216A1 (it) * 2020-01-22 2021-07-22 Nuovo Pignone Tecnologie Srl Un diffusore con passo delle pale di diffusore non costante e turbomacchina centrifuga comprendente detto diffusore

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE916604C (de) * 1942-09-12 1954-08-12 Daimler Benz Ag Leitschaufelkranz fuer Fliehkraftgeblaese
US4131389A (en) * 1975-11-28 1978-12-26 The Garrett Corporation Centrifugal compressor with improved range
US4368005A (en) * 1977-05-09 1983-01-11 Avco Corporation Rotary compressors
GB2013280B (en) * 1978-01-25 1983-02-23 Secr Defence Diffusers for centrifugl compressors
FR2487018A1 (fr) * 1980-07-16 1982-01-22 Onera (Off Nat Aerospatiale) Perfectionnements aux compresseurs supersoniques

Also Published As

Publication number Publication date
DE3705307A1 (de) 1988-09-01
EP0280205A3 (en) 1989-08-02
EP0280205A2 (fr) 1988-08-31
DE3862650D1 (de) 1991-06-13

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