EP2068002A1 - Boîtier de compresseur - Google Patents

Boîtier de compresseur Download PDF

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Publication number
EP2068002A1
EP2068002A1 EP07122647A EP07122647A EP2068002A1 EP 2068002 A1 EP2068002 A1 EP 2068002A1 EP 07122647 A EP07122647 A EP 07122647A EP 07122647 A EP07122647 A EP 07122647A EP 2068002 A1 EP2068002 A1 EP 2068002A1
Authority
EP
European Patent Office
Prior art keywords
sectional area
opening
cross
compressor
outlet housing
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Withdrawn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
EP07122647A
Other languages
German (de)
English (en)
Inventor
Niklas Sievers
Hans-Peter Dickmann
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.)
Accelleron Industries AG
Original Assignee
ABB Turbo Systems 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 ABB Turbo Systems AG filed Critical ABB Turbo Systems AG
Priority to EP07122647A priority Critical patent/EP2068002A1/fr
Priority to PCT/EP2008/066777 priority patent/WO2009071621A1/fr
Publication of EP2068002A1 publication Critical patent/EP2068002A1/fr
Withdrawn legal-status Critical Current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

Definitions

  • the invention relates to the field of centrifugal compressors, as used for example in exhaust gas turbochargers for charging internal combustion engines.
  • the invention relates to an outlet housing of such a radial compressor.
  • Radial compressors are used, for example, in the exhaust gas turbocharger or as an industrial compressor in the process industry.
  • Exhaust gas turbochargers are used to increase the performance of internal combustion engines (reciprocating engines).
  • An exhaust gas turbocharger consists of an exhaust gas turbine in the exhaust gas stream of the internal combustion engine and the compressor in the intake tract of the internal combustion engine.
  • the turbine wheel of the exhaust gas turbine is set in rotation by the exhaust gas flow of the engine and drives the impeller of the compressor via a shaft.
  • the compressor increases the pressure in the intake tract of the internal combustion engine, so that when sucking a larger amount of air enters the combustion chambers.
  • the cross-sectional area increase is generally designed so that the volume flow is collected continuously and forms a homogeneous flow field over the circumference.
  • tongue the volume flow flowing out of the radial diffuser is divided into a first partial flow which is collected over the circumference and a second partial flow which flows directly into the downstream diffuser.
  • the second partial flow the flow is raised upright, less strong in the first partial flow.
  • a measure for the assessment of the circumferential asymmetry is the normalized pressure or the normalized pressure difference, also called distortion.
  • the extent of the circumferential asymmetry depends on the spiral geometry and the diffuser blade number, the distance of the diffuser blade trailing edge to the spiral inlet, the diffuser type, the impeller or the volume flow, etc. The circumferential asymmetry can directly and indirectly lead to negative effects on the efficiency of the compressor stage.
  • the spiral surface is not formed in the area of the penetration, so that the spiral begins after penetration (this is referred to as a "cut-out tongue").
  • asymmetrically designed radial diffusers can also be used. However, their production is complex and expensive.
  • the object of the present invention is to modify an outlet housing for a radial compressor such that the circumferential asymmetry and the resulting pressure variation are significantly reduced.
  • This can be achieved by modifying the cross-sectional area of the collecting space in the outlet housing according to the invention.
  • a certain cross-sectional area is selected, for example, the cross-sectional area at 120 °.
  • this cross-sectional area replaces the original cross-sectional areas between the beginning of the spiral and this cross-sectional area, so that the collecting space has a constant cross-sectional area over the first 120 °. The rest of the collection space remains unchanged as a spiral.
  • the collection space has a region with a constant and a region with increasing cross-sectional area, so represents a combination of a collector - on the first 120 ° - and a spiral.
  • a modification in the diffuser area results optionally, whereby the diffuser cross-sectional area remains unchanged in both cases.
  • the inventively designed collecting space leads to a more homogeneous flow through the compressor stages.
  • impeller excitation is reduced, resulting in more free space in the impeller vane design for efficiency optimization purposes.
  • Fig. 1 shows a first embodiment of a modified outlet housing 1 of a centrifugal compressor.
  • the outlet housing has two openings.
  • the first opening is annular and open radially against the inside. Through this opening, the air coming from the compressor wheel and the radial diffuser 42 flows into the collecting space, which in the Fig. 1 is designated with rough hatching.
  • the radial diffuser extends between the compressor wheel and the collecting space in the outlet housing. It can optionally be limited by separate components and / or equipped with diffuser blades.
  • the second opening is located in the outlet flange 12, at the end of the collecting space and the adjoining diffuser 30, which in the Fig. 1 is designated with fine hatching. Through the second opening, the air is discharged to the engine.
  • Fig. 5 shows a guided along VV Section through this area of the outlet housing.
  • the tongue can optionally be omitted, as described above.
  • the portion 21 of the collecting space and the diffuser 30 in the initial region of the spiral winding are not delimited by any housing part.
  • the air exiting the compressor wheel and the adjacent radial diffuser 42 with the vanes 41 is in Fig. 1 indicated by the curved arrows.
  • the collection room is divided into two sections.
  • the cross-sectional area increases, as is usual for a spiral.
  • the designated cross-sectional area A 180 is already greater than the cross-sectional area A 120 at the end of the first section 21.
  • the course of a conventional spiral in the first section 21 is indicated by a thin line.
  • FIG. 2 The cross-sectional area of the plenum of the first embodiment is shown schematically in FIG Fig. 2 shown. In section 21, between 0 ° and 120 °, the cross-sectional area is constant, and in section 22, from 120 ° to 360 °, the cross-sectional area increases continuously.
  • the cross-sectional area increases, as is usual for a spiral.
  • the designated cross-sectional area A 180 at the end of the second section 22 is greater than the cross-sectional area A 120 at the end of the first section 21.
  • the cross-sectional area increases again, as is usual for a spiral.
  • the unspecified cross-sectional area at the end of the fourth section 24 is greater than the cross-sectional area A 240 at the end of the third section 23.
  • FIG. 4 The cross-sectional area of the plenum of the second embodiment is shown schematically in FIG Fig. 4 shown.
  • the cross-sectional area is constant, in section 22, from 120 ° to 180 °, and in section 24, from 240 ° to 360 ° , the cross-sectional area increases continuously.
  • the specified circumferential angle values for the limitation of the individual sections, in particular in the first embodiment, are the result of simulation calculations. Fig.
  • FIG. 6 shows in comparison with a conventional spiral (solid line) the course of normalized pressure in a discharge housing according to the first embodiment.
  • the result is a distortion reduced by up to 30%, which results in a more uniform flow around the blades of the radial diffuser, resulting in increased efficiency.
  • the backflow of air from the diffuser into the collecting space can be significantly reduced, whereby a more continuous collecting of the volume flow takes place.
  • the low-impulse region directly after the tongue, in which the back-flowing air collects is greatly reduced. Together with the larger cross-sectional area results in a Entdrosselung and consequently a higher throughput of the compressor stage.
  • the two-dimensional configuration of the cross section may vary along the circumference of the plenum.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
EP07122647A 2007-12-07 2007-12-07 Boîtier de compresseur Withdrawn EP2068002A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP07122647A EP2068002A1 (fr) 2007-12-07 2007-12-07 Boîtier de compresseur
PCT/EP2008/066777 WO2009071621A1 (fr) 2007-12-07 2008-12-04 Carter de compresseur

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP07122647A EP2068002A1 (fr) 2007-12-07 2007-12-07 Boîtier de compresseur

Publications (1)

Publication Number Publication Date
EP2068002A1 true EP2068002A1 (fr) 2009-06-10

Family

ID=39386152

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07122647A Withdrawn EP2068002A1 (fr) 2007-12-07 2007-12-07 Boîtier de compresseur

Country Status (2)

Country Link
EP (1) EP2068002A1 (fr)
WO (1) WO2009071621A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019097730A1 (fr) * 2017-11-20 2019-05-23 三菱重工エンジン＆ターボチャージャ株式会社 Compresseur centrifuge et turbocompresseur pourvu dudit compresseur

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH286975A (de) * 1951-05-01 1952-11-15 Karrer Josef Fliehkraftgebläse, insbesondere Ventilator mit Spiralgehäuse.
WO1990009524A1 (fr) * 1989-02-14 1990-08-23 Airflow Research & Manufacturing Corporation Ventilateur centrifuge et diffuseur a volute d'accumulation
EP0570955A1 (fr) * 1992-05-20 1993-11-24 Praxair Technology, Inc. Collecteur d'un compresseur à section transversale non-uniforme
WO2001000996A1 (fr) * 1999-06-30 2001-01-04 Alliedsignal Inc. Carter de compresseur moule sous pression, destine aux compresseurs centrifuges et presentant une vraie forme de volute
WO2007033199A2 (fr) * 2005-09-13 2007-03-22 Ingersoll-Rand Company Volute destinee a s'utiliser avec un compresseur centrifuge

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH286975A (de) * 1951-05-01 1952-11-15 Karrer Josef Fliehkraftgebläse, insbesondere Ventilator mit Spiralgehäuse.
WO1990009524A1 (fr) * 1989-02-14 1990-08-23 Airflow Research & Manufacturing Corporation Ventilateur centrifuge et diffuseur a volute d'accumulation
EP0570955A1 (fr) * 1992-05-20 1993-11-24 Praxair Technology, Inc. Collecteur d'un compresseur à section transversale non-uniforme
WO2001000996A1 (fr) * 1999-06-30 2001-01-04 Alliedsignal Inc. Carter de compresseur moule sous pression, destine aux compresseurs centrifuges et presentant une vraie forme de volute
WO2007033199A2 (fr) * 2005-09-13 2007-03-22 Ingersoll-Rand Company Volute destinee a s'utiliser avec un compresseur centrifuge

Also Published As

Publication number Publication date
WO2009071621A1 (fr) 2009-06-11

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