EP2483567A1 - Diffuseur de compresseur radial - Google Patents

Diffuseur de compresseur radial

Info

Publication number
EP2483567A1
EP2483567A1 EP10760303A EP10760303A EP2483567A1 EP 2483567 A1 EP2483567 A1 EP 2483567A1 EP 10760303 A EP10760303 A EP 10760303A EP 10760303 A EP10760303 A EP 10760303A EP 2483567 A1 EP2483567 A1 EP 2483567A1
Authority
EP
European Patent Office
Prior art keywords
radial
diffuser
radius
radial compressor
section
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Withdrawn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
EP10760303A
Other languages
German (de)
English (en)
Inventor
Jean-Paul Komor
Theodor Wallmann
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
Original Assignee
Siemens AG
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 filed Critical Siemens AG
Publication of EP2483567A1 publication Critical patent/EP2483567A1/fr
Withdrawn legal-status Critical Current

Links

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
    • 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
    • F05D2250/00—Geometry
    • F05D2250/50—Inlet or outlet
    • F05D2250/52—Outlet

Definitions

  • Radial compressor diffuser The invention relates to a radial compressor diffuser for a radial compressor stage, wherein the radial compressor diffuser has a radial diffuser outlet blading.
  • Radial compressor stages are used in different types of turbocompressors. In this case, the type of flow guidance in the radial compressor stages depending on
  • the flow guide in radial compressors has an impeller, a radial diffuser, and a discharge housing as essential elements. This applies in particular to the flow guidance of
  • the radial diffuser can be designed as a shovelless or as a bladed diffuser.
  • the outflow housing is usually as
  • Mismatched spiral housing often has a particularly negative impact on the operating behavior of the compressor stage.
  • Blades which can lead to a vibration excitation of the highly loaded impeller. So is one
  • the object of the invention is to a centrifugal compressor
  • a radial compressor diffuser for a radial compressor stage comprising a
  • Flow channel which extends radially outwardly and radially inwardly lying at a first radius cylindrically encircling inlet cross-section and radially outward lying a cylindrical circumferential outlet cross-section and which is designed such that during operation of the
  • Radial compressor diffuser one arranged from a directly upstream of the radial compressor diffuser
  • Outlet cross section in the flow channel is a
  • Radial compressor impeller is and that their radial extent terminates inwardly at a third radius, wherein the
  • Ratio of the third radius to the first radius is at least 1.2. According to the invention is also a
  • Guiding blading is used, which causes a nearly constant outflow angle with the value c even with variation of the volume flow along the characteristic, whereby an optimal inflow to the spiral is achieved in the entire range of the curve and losses in efficiency and compressor ⁇ work can be avoided.
  • the radial diffuser outlet blading of the radial compressor diffuser has a plurality of guide vanes arranged over the circumference, the leading edges of which are arranged circumferentially at the third radius.
  • the plurality of guide vanes arranged over the circumference preferably has trailing edges which are arranged circumferentially in a region between the third radius and the radius of the outlet cross section.
  • the radial diffuser exit blading of the present invention has a higher inlet radii r / ri than conventional bladed diffusers, therefore the blading is placed in a zone having a comparatively low speed level (the velocity level in the diffuser is approximately proportional to the reciprocal of the radial Extension).
  • the incidence of losses at the inlet of the blading on the one hand low, on the other hand there is in the constriction between stages such a low speed ⁇ or Mach number level that even at high volumetric flows the critical mass flux is not achieved.
  • the blading In order to does not occur in the blading according to the invention
  • the ratio of the third radius to the first radius is at least 1.35.
  • the radial diffuser exit blading according to the invention causes the impressed outflow angle to ensure an improved flow to the spiral collecting space and its radial extent to the inside ends at the third radius, wherein the ratio of the third radius to the first radius is at least so large that known from conventional bladed radial diffusers disadvantages be avoided .
  • Figure 1 is a schematic sectional view of a
  • Figure 2 is a plan view of the radial diffuser outlet ⁇ blading of the radial compressor stage of Figure 1.
  • Figure 1 is a schematic sectional view of a
  • Radial compressor stage 1 shown according to an embodiment of the invention.
  • the radial compressor stage 1 has a radial compressor impeller 3, a radial compressor diffuser 6, and a discharge spiral housing 8.
  • the radial compressor impeller 3 mounted on a shaft 2 for driving the radial compressor impeller ⁇ 3.
  • the radial compressor stage 1 Gas in the centrifugal compressor impeller 3 enters a impeller inlet radial compressor 4 of the impeller 3, flows through the radial compressor impeller 3 and enters via the impeller ⁇ outlet 5 and a radial compressor diffuser inlet 9 in the radial compressor diffuser 6 a.
  • the radial compressor diffuser inlet 9 is in one
  • Radial compressor diffuser 6 also has a channel 7 and an outlet 11, which is arranged at the radius 12 and has a certain width 13.
  • a Abströmspiralgetude 8 connects with a Abströmgephaseuseeintritt 14.
  • the diffuser 6 also has a
  • Radial diffuser exit blading 15 is close to
  • Radialdiffusoraustritt 11 arranged and extends between a radius 16, i. the radius at the entrance of the radial diffuser exit blading 15, and the area between the third radius 16 and the radius 12 of the
  • Embodiment is a radial diffuser ⁇ blading 15 in the outer region of the radial compressor diffuser 6, shortly before the entry zone of Abströmspiral ⁇ housing 8 is provided.
  • FIG. 2 schematically shows part of the radial diffuser outlet blading 15 of the radial compressor stage from FIG.
  • the blading 15 has a plurality of
  • Vanes 17 which extend radially between the radius 22 and the radius 16.
  • the trailing edges 20 of the guide vanes 17 at the radius 22 and the leading edges 19 of the vanes 17 are arranged at the radius 16.
  • the vanes 17 are inclined with respect to a radial direction, so that the adjusting Flow velocity vector 21 downstream of the

Landscapes

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

Abstract

L'invention concerne un diffuseur de compresseur radial pour un étage de compresseur radial (1), ce diffuseur comportant un canal d'écoulement (7) qui s'étend de manière radiale vers l'extérieur et qui présente une section transversale d'entrée (9) cylindrique sur un premier rayon (10) s'étendant intérieurement de manière radiale, et une section transversale de sortie (11) cylindrique s'étendant extérieurement de manière radiale. Dans la zone de la section transversale de sortie (11) dans le canal d'écoulement (7) est disposé un aubage de sortie de diffuseur radial (15) qui permet d'éviter les inconvénients connus de diffuseurs à aubage classiques.
EP10760303A 2009-09-28 2010-09-23 Diffuseur de compresseur radial Withdrawn EP2483567A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102009043230A DE102009043230A1 (de) 2009-09-28 2009-09-28 Radialverdichterdiffusor
PCT/EP2010/064048 WO2011036206A1 (fr) 2009-09-28 2010-09-23 Diffuseur de compresseur radial

Publications (1)

Publication Number Publication Date
EP2483567A1 true EP2483567A1 (fr) 2012-08-08

Family

ID=43568262

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10760303A Withdrawn EP2483567A1 (fr) 2009-09-28 2010-09-23 Diffuseur de compresseur radial

Country Status (5)

Country Link
US (1) US20120183395A1 (fr)
EP (1) EP2483567A1 (fr)
CN (1) CN102686889A (fr)
DE (1) DE102009043230A1 (fr)
WO (1) WO2011036206A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9863439B2 (en) * 2014-09-11 2018-01-09 Hamilton Sundstrand Corporation Backing plate
CN105257574A (zh) * 2015-11-27 2016-01-20 中国航空动力机械研究所 斜流离心组合压气机
JP6655712B2 (ja) * 2016-03-28 2020-02-26 三菱重工コンプレッサ株式会社 回転機械
DE102016125143A1 (de) * 2016-12-21 2018-06-21 Man Diesel & Turbo Se Radialverdichter und Turbolader
DE102017223791A1 (de) 2017-12-27 2019-06-27 Siemens Aktiengesellschaft Wellendichtungsanordnung einer Turbomaschine, Turbomaschine

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE709266C (de) * 1936-09-15 1941-08-12 Gutehoffnungshuette Oberhausen Fliehkraftverdichter
US2681760A (en) * 1949-02-26 1954-06-22 Curtiss Wright Corp Centrifugal compressor
GB751907A (en) * 1953-07-01 1956-07-04 Augsburg Nurnburg A G Maschf Improvements in or relating to constructions of the flow channel on the input and output sides of the rotor in radial flow compressors
US4824325A (en) * 1988-02-08 1989-04-25 Dresser-Rand Company Diffuser having split tandem low solidity vanes
DE102004027594B4 (de) * 2004-06-05 2006-06-29 Man B & W Diesel Ag Strömungsmaschine mit radial durchströmtem Verdichterrad
EP1860325A1 (fr) * 2006-05-26 2007-11-28 ABB Turbo Systems AG Diffuseur

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
None *
See also references of WO2011036206A1 *

Also Published As

Publication number Publication date
DE102009043230A1 (de) 2011-05-26
WO2011036206A1 (fr) 2011-03-31
CN102686889A (zh) 2012-09-19
US20120183395A1 (en) 2012-07-19

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