EP1277967B1 - Verdichtergehäusestruktur - Google Patents
Verdichtergehäusestruktur Download PDFInfo
- Publication number
- EP1277967B1 EP1277967B1 EP02013280A EP02013280A EP1277967B1 EP 1277967 B1 EP1277967 B1 EP 1277967B1 EP 02013280 A EP02013280 A EP 02013280A EP 02013280 A EP02013280 A EP 02013280A EP 1277967 B1 EP1277967 B1 EP 1277967B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- groove
- grooves
- housing structure
- compressor housing
- cross sections
- 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
Links
Images
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
- F04D29/66—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
- F04D29/685—Inducing localised fluid recirculation in the stator-rotor interface
-
- 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
- F04D29/52—Casings; Connections of working fluid for axial pumps
- F04D29/522—Casings; Connections of working fluid for axial pumps especially adapted for elastic fluid pumps
- F04D29/526—Details of the casing section radially opposing blade tips
Definitions
- the invention relates to a compressor housing structure in the region of an axially flowed through Blade ring, with a plurality of uniformly distributed over the housing periphery, to the blade tips open towards and at least approximately axially extending grooves, according to the preamble of claim 1.
- a compressor housing structure of this type is known for example from DE 35 21 1 798 C2 known and has the primary task, with increasing throttling in partial load or full load raise the pumping limit to allow safe operation without pumps or to allow an increase in the available work area.
- the grooves act as recirculation channels for high pressure accumulated air in the air External area of the blade ring without recirculation option to "rotating stall" and pumps would lead.
- the upstream, front groove ends upstream of the blade tip entry edges see dimension A in Figures 2, 8, 9 and 10
- the rear groove ends lie in the radial plane of the blade tip exit edges or rather in front of this radial plane.
- Figure 4 of this patent is provided in to arrange straight grooves in the circumferential direction inclined so that the air inlet their downstream ends is facilitated (see also claim 2).
- EP 0 497 574 B1 protects a fan case treatment which is arranged above the blade tips of a low-pressure compressor.
- This structure includes axially spaced inlet and outlet passages (34, 36) and inlet and outlet ports, respectively (56,58) and vanes (38,66) in the connecting passages between Inlet and outlet.
- the recirculation air entering the structure with significant circumferential component is deflected by the vanes so that they pass through the outlet in predominantly axial direction is returned to the main flow, i. largely without Circumferential component. Without this change or reduction of the perimeter component would hit the air with counter-rotation on the blade tips, i.
- the object of the invention is a compressor housing structure which is based on the principle of air or gas recirculation and at simple, inexpensive construction a significant increase in the surge limit of a Compressor and thus a noticeable increase in his work area by fluidic Optimization possible.
- the groove cross sections so inclined that the entry of the recirculation air is facilitated, the Inclination from the opening to the groove bottom a circumferential component in the direction of rotation, i.e. has in the direction of movement of the blade tips.
- the inclination is reversed, so that the recirculation air exiting here in the main flow with a direct spin on the rotating blade tips hits what the flow significantly improved and reduced losses. Also the tendency to flow separation is noticeably reduced.
- the compressor housing structure 1 has a plurality of evenly over the circumference of the housing distributed grooves 2, which extends from an upstream radial plane Eo up to a downstream radial plane egg extend.
- an upstream radial plane Eo up to a downstream radial plane egg extend In the right, lower part of Figure 1 is to detect the tip 8 of a blade of a blade ring 7, wherein accordingly the flow direction (large white arrow) the blade tip leading edge 9 left, the Vane tip exit edge 10 is right.
- the direction of movement D of the blade tip 8 is indicated by a cross in a circle, the peripheral component of the corresponding Rotational motion should therefore point to the back starting from the plane of the drawing.
- Radial plane Eo i. the front end of the groove lies clearly upstream of the blade tip leading edge 9, the radial plane Ei, i.
- each groove 2 is according to the invention from its front, upstream to its rear, continuously twisted (twisted) downstream end, the drill axis a imaginary, axial straight line in the annular space contour R is.
- the annular space contour R is in the groove area usually circular cylindrical, in rare cases, it can be appropriate slightly taper or widen a circular cone.
- the opening 3 of each groove thus has an at least largely axial center line / axis of symmetry.
- the eye-catching, mirror-symmetrical and bell-like section line in Figure 1 results from the Section of a radial-axial plane with the spatially twisted groove contour.
- the dashed Groove contour, in particular the groove bottom 6, right above the "bell line” is behind the plane of the drawing, whereas the dash-dotted groove contour on the left above the "bell line” lies in front of the drawing plane.
- At the highest point of the "bell line” lies the middle the Nutgrundes 6 exactly in the plane of the drawing, as well as the imaginary center line of the corresponding groove cross-section.
- the opening 3 of each groove 2 may be in its axially middle Be covered area by an annular circumferential ridge 11, the inner diameter aligned with the annular space contour R. This can have advantages in the sense of lesser Friction, turbulence, etc. result.
- FIG. 2 corresponds to a radial section / cross section according to the course A-A in FIG. 1.
- the blade tip 8 can be seen with its direction of movement D (arrow to the left) and with its leading edge 9 and its trailing edge 10 short distance above the blade tip contour is the annular space contour R as a circular arc line recognizable.
- the vertical, dot-dashed and unspecified axis through the point S corresponds to the radial direction, starting from the blade ring center.
- the laterally inclined axes M, Mi and Mo correspond to imaginary central axes of Nutquerroughe at axially different locations of the groove length.
- the central axes M, Mi, Mo all groove cross sections under different Inclination angles ⁇ , ⁇ i, ⁇ o intersect the annular space contour in an axial straight line, so that S is not just an intersection, but a straight, axial intersection and at the same time the axis of symmetry of the opening 3 of the groove 2. S is therefore also the imaginary Center of twisting / twisting.
- the path of the recirculation flow through the groove 2 is also indicated here with small white arrows.
- the flow entry at the rear Nutende takes place approximately at the angle ⁇ i with a peripheral component in the direction of movement the blade tips 8.
- the flow outlet at the front groove end is about at the angle ⁇ o in the sense of a constant spin with the blade rotation.
- the groove depth can vary over the axial Nuterstreckung, in particular a reduction the depth to the two groove ends is conceivable.
- the exact definition of Groove geometries including inclination angles are likely to require appropriate Calculations and experiments.
- FIG. 2 only one groove 2 is shown for the sake of clarity. Actually the grooves are relatively close in the circumferential direction, the remaining wall thicknesses between the grooves may be smaller than the clear distance between the side walls the grooves. In Figure 2 would therefore be real about 4 to 5 grooves next to each other recognizable be.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Description
Claims (7)
- Verdichtergehäusestruktur im Bereich eines axial durchströmten Laufschaufelkranzes, mit einer Vielzahl von gleichmäßig über den Gehäuseumfang verteilten, zu den Schaufelspitzen hin offenen und zumindest annähernd axial verlaufenden Nuten, welche sich von einer ersten Radialebene stromaufwärts der Schaufelspitzeneintrittskanten bis in eine zweite Radialebene axial zwischen den Schaufelspitzeneintrittskanten und den Schaufelspitzenaustrittskanten erstrecken und welche - jeweils im Radialschnitt - Nutquerschnitte mit über den Großteil ihrer Tiefe geraden und parallelen Seitenwänden aufweisen, dadurch gekennzeichnet, dass die - gedachten - Mittelachsen (Mo) der Nutquerschnitte an den stromaufwärtigen Nutenden - von der Öffnung (3) zum Nutgrund (6) hin - einen Neigungswinkel (α0) zur Radialrichtung mit einer Umfangskomponente entgegen der Bewegungsrichtung (D) der Schaufelspitzen (8) aufweisen,
dass die Mittelachsen (Mi) der Nutquerschnitte an den stromabwärtigen Nutenden - von der Öffnung (3) zum Nutgrund (6) hin - einen Neigungswinkel (αi) zur Radialrichtung mit einer Umfangskomponente in Bewegungsrichtung (D) der Schaufelspitzen (8) aufweisen,
dass sich der Neigungswinkel (α) der Mittelachsen (M) der Nutquerschnitte zwischen den stromaufwärtigen und den stromabwärtigen Nutenden stufenlos im Sinne einer Verdrillung/Verwindung ändert, und
dass die - gedachten - Schnittlinien (S) der Mittelachsen (M, Mi, Mo) der Nutquerschnitte mit der äußeren, gehäuseseitigen Ringraumkontur (R) zumindest näherungsweise axiale Geradenstücke sind, so dass die Öffnungen (3) der Nuten (2) in gleicher Weise axial verlaufen. - Verdichtergehäusestruktur nach Anspruch 1, dadurch gekennzeichnet, dass im axial mittleren Bereich der Nuten (2) ein ringförmiger, die Öffnungen (3) der Nuten (2) teilweise versperrender Steg (11) angeordnet ist, dessen innerer Durchmesser mit dem örtlichen Durchmesser der äußeren Ringraumkontur (R) übereinstimmt.
- Verdichtergehäusestruktur nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Nuten (2) spanend durch Fräsen, insbesondere mittels Finger- oder Kugelfräser, oder spanlos durch Gießen oder Funkenerosion gefertigt sind.
- Verdichtergehäusestruktur nach einem oder mehreren der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass jeder Nutgrund (6) gerundet ist, oder zumindest die Übergänge von den Seitenwänden zum Nutgrund gerundet sind.
- Verdichtergehäusestruktur nach einem oder mehreren der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass die mittlere Oberflächenrauhigkeit Ra in den Nuten (2) 1,6 µm beträgt.
- Verdichtergehäusestruktur nach einem oder mehreren der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass die Ränder der Öffnungen (3) der Nuten (2), d.h. die Übergänge zur äußeren Ringraumkontur (R), scharfkantig ausgeführt sind.
- Verdichtergehäusestruktur nach einem oder mehreren der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass die Nuttiefe (T) -jeweils gerechnet von der Schnittlinie (S) der Mittelachsen (M, Mi, Mo) der Nutquerschnitte mit der äußeren Ringraumkontur (R) bis zur Mitte des Nutgrundes (6) - über die axiale Nutlänge konstant ist oder vom axial mittleren Nutbereich zum stromaufwärtigen und zum stromabwärtigen Nutende hin stufenlos abnimmt.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10135003A DE10135003C1 (de) | 2001-07-18 | 2001-07-18 | Verdichtergehäusestruktur |
DE10135003 | 2001-07-18 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1277967A1 EP1277967A1 (de) | 2003-01-22 |
EP1277967B1 true EP1277967B1 (de) | 2004-04-14 |
Family
ID=7692258
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP02013280A Expired - Lifetime EP1277967B1 (de) | 2001-07-18 | 2002-06-18 | Verdichtergehäusestruktur |
Country Status (4)
Country | Link |
---|---|
US (1) | US6742983B2 (de) |
EP (1) | EP1277967B1 (de) |
CA (1) | CA2392427C (de) |
DE (2) | DE10135003C1 (de) |
Families Citing this family (28)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7074006B1 (en) * | 2002-10-08 | 2006-07-11 | The United States Of America As Represented By The Administrator Of National Aeronautics And Space Administration | Endwall treatment and method for gas turbine |
DE10355241A1 (de) | 2003-11-26 | 2005-06-30 | Rolls-Royce Deutschland Ltd & Co Kg | Strömungsarbeitsmaschine mit Fluidzufuhr |
DE10355240A1 (de) | 2003-11-26 | 2005-07-07 | Rolls-Royce Deutschland Ltd & Co Kg | Strömungsarbeitsmaschine mit Fluidentnahme |
DE102004030597A1 (de) | 2004-06-24 | 2006-01-26 | Rolls-Royce Deutschland Ltd & Co Kg | Strömungsarbeitsmaschine mit Aussenradstrahlerzeugung am Stator |
DE102004043036A1 (de) | 2004-09-06 | 2006-03-09 | Rolls-Royce Deutschland Ltd & Co Kg | Strömungsarbeitsmaschine mit Fluidentnahme |
DE102004055439A1 (de) * | 2004-11-17 | 2006-05-24 | Rolls-Royce Deutschland Ltd & Co Kg | Strömungsarbeitsmaschine mit dynamischer Strömungsbeeinflussung |
US20080044273A1 (en) * | 2006-08-15 | 2008-02-21 | Syed Arif Khalid | Turbomachine with reduced leakage penalties in pressure change and efficiency |
US7827245B2 (en) * | 2007-03-06 | 2010-11-02 | International Business Machines Corporation | Methods and computer program products for securing display of message content |
DE102007037924A1 (de) | 2007-08-10 | 2009-02-12 | Rolls-Royce Deutschland Ltd & Co Kg | Strömungsarbeitsmaschine mit Ringkanalwandausnehmung |
DE102007056953B4 (de) | 2007-11-27 | 2015-10-22 | Rolls-Royce Deutschland Ltd & Co Kg | Strömungsarbeitsmaschine mit Ringkanalwandausnehmung |
DE102008011644A1 (de) | 2008-02-28 | 2009-09-03 | Rolls-Royce Deutschland Ltd & Co Kg | Gehäusestrukturierung für Axialverdichter im Nabenbereich |
DE102008031982A1 (de) | 2008-07-07 | 2010-01-14 | Rolls-Royce Deutschland Ltd & Co Kg | Strömungsarbeitsmaschine mit Nut an einem Laufspalt eines Schaufelendes |
DE102008037154A1 (de) | 2008-08-08 | 2010-02-11 | Rolls-Royce Deutschland Ltd & Co Kg | Strömungsarbeitsmaschine |
DE102008052401A1 (de) | 2008-10-21 | 2010-04-22 | Rolls-Royce Deutschland Ltd & Co Kg | Strömungsarbeitsmaschine mit Laufspalteinzug |
DE102008052409A1 (de) | 2008-10-21 | 2010-04-22 | Rolls-Royce Deutschland Ltd & Co Kg | Strömungsarbeitsmaschine mit saugseitennaher Randenergetisierung |
FR2940374B1 (fr) * | 2008-12-23 | 2015-02-20 | Snecma | Carter de compresseur a cavites optimisees. |
US8337146B2 (en) * | 2009-06-03 | 2012-12-25 | Pratt & Whitney Canada Corp. | Rotor casing treatment with recessed baffles |
US9181877B2 (en) | 2012-09-27 | 2015-11-10 | United Technologies Corporation | Seal hook mount structure with overlapped coating |
DE102013210167A1 (de) | 2013-05-31 | 2014-12-04 | Rolls-Royce Deutschland Ltd & Co Kg | Strukturbaugruppe für eine Strömungsmaschine |
DE102013210171A1 (de) | 2013-05-31 | 2014-12-04 | Rolls-Royce Deutschland Ltd & Co Kg | Strukturbaugruppe für eine Strömungsmaschine |
DE102013210169A1 (de) | 2013-05-31 | 2014-12-04 | Rolls-Royce Deutschland Ltd & Co Kg | Strukturbaugruppe für eine Strömungsmaschine |
DE102013210168A1 (de) | 2013-05-31 | 2014-12-04 | Rolls-Royce Deutschland Ltd & Co Kg | Strukturbaugruppe für eine Strömungsmaschine |
US10823194B2 (en) | 2014-12-01 | 2020-11-03 | General Electric Company | Compressor end-wall treatment with multiple flow axes |
CN113007139A (zh) * | 2021-03-12 | 2021-06-22 | 西北工业大学 | 一种压气机可调控耦合式机匣处理扩稳方法 |
CN113007138A (zh) * | 2021-03-12 | 2021-06-22 | 西北工业大学 | 一种压气机前置组合式机匣设计方法 |
US20240159247A1 (en) * | 2022-07-15 | 2024-05-16 | Raytheon Technologies Corporation | Casing Treatment for Gas Turbine Engines |
US12092034B2 (en) | 2022-10-03 | 2024-09-17 | General Electric Company | Circumferentially varying fan casing treatments for reducing fan noise effects |
US12085023B2 (en) | 2022-10-03 | 2024-09-10 | General Electric Company | Circumferentially varying fan casing treatments for reducing fan noise effects |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2017228B (en) * | 1977-07-14 | 1982-05-06 | Pratt & Witney Aircraft Of Can | Shroud for a turbine rotor |
CA1314486C (en) * | 1984-06-19 | 1993-03-16 | Michael John Charles Waterman | Axial flow compressor surge margin improvement |
DE3539604C1 (de) * | 1985-11-08 | 1987-02-19 | Turbo Lufttechnik Gmbh | Axialgeblaese |
US5282718A (en) * | 1991-01-30 | 1994-02-01 | United Technologies Corporation | Case treatment for compressor blades |
DE69204861T2 (de) * | 1991-01-30 | 1996-05-23 | United Technologies Corp | Ventilatorgehäuse mit Rezirculationskanälen. |
RU2034175C1 (ru) * | 1993-03-11 | 1995-04-30 | Центральный институт авиационного моторостроения им.П.И.Баранова | Турбокомпрессор |
US5607284A (en) * | 1994-12-29 | 1997-03-04 | United Technologies Corporation | Baffled passage casing treatment for compressor blades |
US6231301B1 (en) * | 1998-12-10 | 2001-05-15 | United Technologies Corporation | Casing treatment for a fluid compressor |
US6234747B1 (en) * | 1999-11-15 | 2001-05-22 | General Electric Company | Rub resistant compressor stage |
-
2001
- 2001-07-18 DE DE10135003A patent/DE10135003C1/de not_active Expired - Fee Related
-
2002
- 2002-06-18 EP EP02013280A patent/EP1277967B1/de not_active Expired - Lifetime
- 2002-06-18 DE DE50200351T patent/DE50200351D1/de not_active Expired - Lifetime
- 2002-07-04 CA CA2392427A patent/CA2392427C/en not_active Expired - Fee Related
- 2002-07-17 US US10/196,552 patent/US6742983B2/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
US6742983B2 (en) | 2004-06-01 |
CA2392427A1 (en) | 2003-01-18 |
EP1277967A1 (de) | 2003-01-22 |
DE10135003C1 (de) | 2002-10-02 |
US20030026695A1 (en) | 2003-02-06 |
DE50200351D1 (de) | 2004-05-19 |
CA2392427C (en) | 2010-09-14 |
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