DE102010026176B4 - Device and method for map stabilization of a compressor - Google Patents
Device and method for map stabilization of a compressor Download PDFInfo
- Publication number
- DE102010026176B4 DE102010026176B4 DE102010026176.9A DE102010026176A DE102010026176B4 DE 102010026176 B4 DE102010026176 B4 DE 102010026176B4 DE 102010026176 A DE102010026176 A DE 102010026176A DE 102010026176 B4 DE102010026176 B4 DE 102010026176B4
- Authority
- DE
- Germany
- Prior art keywords
- compressor
- inflow
- angle
- region
- movable element
- 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 - Fee Related
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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
- F04D29/4206—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
- F04D29/4213—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps suction ports
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- 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
- F04D29/46—Fluid-guiding means, e.g. diffusers adjustable
- F04D29/462—Fluid-guiding means, e.g. diffusers adjustable especially adapted for elastic fluid pumps
- F04D29/464—Fluid-guiding means, e.g. diffusers adjustable especially adapted for elastic fluid pumps adjusting flow cross-section, otherwise than by using adjustable stator blades
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- 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
- F05D2250/51—Inlet
Abstract
Vorrichtung zur Kennfeldstabilisierung eines Verdichters (1), wobei im Eintrittsbereich des Verdichters (1) ein bewegliches Element angeordnet ist, wobei durch das bewegliche Element die stirnseitige Anströmfläche eines Laufrades eines Verdichters einstellbar überdeckbar ist, dadurch gekennzeichnet, dass das bewegliche Element ein an der Innenwand eines Gehäuses (2) angeordneter Konus (3) ist, der sich in Strömungsrichtung verjüngt und dessen Winkel (α) variierbar ist.Device for stabilizing a map of a compressor (1), wherein in the inlet region of the compressor (1) a movable element is arranged, wherein the frontal inflow surface of an impeller of a compressor is adjustably overlapped by the movable element, characterized in that the movable element on the inner wall a housing (2) arranged cone (3) which tapers in the flow direction and the angle (α) is variable.
Description
Technisches GebietTechnical area
Die Erfindung betrifft eine Vorrichtung und ein Verfahren zur Kennfeldstabilisierung eines Verdichters.The invention relates to an apparatus and a method for map stabilization of a compressor.
Stand der TechnikState of the art
Ein Radialverdichter besteht im Wesentlichen aus den Hauptkomponenten Verdichterlaufrad und Verdichtergehäuse. Das Verdichterlaufrad dreht sich im Verdichtergehäuse und befördert die axial einströmende Luft radial nach außen in die Spirale des Verdichtergehäuses. Dabei steht für die Luftzuführung üblicherweise der gesamte Eintrittsquerschnitt des Verdichterlaufrads zur Verfügung. Im Verdichter findet abhängig von der Laufraddrehzahl und vom Verdichtermassenstrom eine Druckanhebung statt. Eine besonders große Druckanhebung bei relativ niedrigen Verdichtermassenströmen lässt einen Radialverdichter derart instabil werden, dass Rückströmen durch das Laufrad stattfindet. Dieses sogenannte Verdichterpumpen soll vermieden werden, da dieser Betrieb schädlich für einen Radialverdichter ist. Eine Maßnahme zur Erweiterung des Verdichterkennfeldes bzw. zur Stabilisierung des Verdichterbetriebs, ist die Einbringung eines Strömungsbypasses (ported shroud) in das Verdichtergehäuse, so dass ein Teil des Luftmassenstroms zum Verdichtereintritt zurückgeleitet und dem Hauptstrom wieder zugeführt wird. Der Bypass kann konstruktiv derart ausgeführt sein, dass er entweder durch eine Verstelleinrichtung erst an der Pumpgrenze freigegeben wird oder aber stets geöffnet ist. Der dem Verdichter nachgeschaltete Verbraucher kann dadurch mit der von ihm gewünschten relativ geringen Luftmenge versorgt werden und es kann dennoch gleichzeitig ein hoher Luftmengenstrom durch das Verdichterlaufrad durchgesetzt werden. Der Einströmwinkel zwischen dem Luftstrom und den Schaufelvorderkanten wird geringer, was an dieser Stelle auch zu geringeren Strömungsablösungen führt, welche als eine Ursache für Verdichterpumpen gelten.A centrifugal compressor essentially consists of the main components compressor impeller and compressor housing. The compressor impeller rotates in the compressor housing and conveys the axially incoming air radially outward into the volute of the compressor housing. In this case, the entire inlet cross section of the compressor impeller is usually available for the air supply. In the compressor, depending on the impeller speed and the compressor mass flow, a pressure increase takes place. A particularly high pressure increase at relatively low compressor mass flows makes a centrifugal compressor become so unstable that backflow through the impeller takes place. This so-called compressor pumping should be avoided, as this operation is detrimental to a centrifugal compressor. One measure for expanding the compressor map or for stabilizing the compressor operation, the introduction of a flow bypass (ported shroud) in the compressor housing, so that a portion of the air mass flow is returned to the compressor inlet and fed back into the main stream. The bypass can be designed such that it is either released by an adjusting only at the surge limit or is always open. The consumer downstream of the compressor can be supplied with the desired by him relatively small amount of air and it can still be enforced at the same time a high flow of air through the compressor impeller. The inflow angle between the air flow and the blade leading edges is reduced, which at this point also leads to lower flow separations, which are considered as a cause for compressor pumps.
Ein Beispiel einer konstruktiven Lösung für den o. g. Strömungsbypass ist in der
Weiterhin sind Leitapparate vor Verdichtereintritt bekannt, welche einstellbar einen Drall in der Anströmung erzeugen. Der Effekt der Strömungsbeeinflussung wird durch die Drallströmung erzeugt. Die verstellbaren Leitschaufeln sind dabei in ihrem Aufbau kompliziert und verbleiben strömungshindernd im Strömungspfad.Furthermore, nozzles are known before compressor entry, which produce adjustable a swirl in the flow. The effect of the flow control is generated by the swirl flow. The adjustable guide vanes are complicated in their construction and remain flow-inhibiting in the flow path.
Gemäß der
Gemäß der
Gemäß der
Gemäß der
Gemäß der
Gemäß der
Aufgabe der ErfindungObject of the invention
Der Erfindung liegt die Aufgabe zugrunde, eine Vorrichtung und ein Verfahren zu Kennfeldstabilisierung eines Verdichters bereitzustellen, welche eine dynamische Anpassung der Durchsätze zur Verschiebung der Pumpgrenze und des Wirkungsgradoptimums ermöglichen.The invention has for its object to provide a device and a method for map stabilization of a compressor, which allow dynamic adjustment of the flow rates for shifting the surge line and the optimum efficiency.
Lösung der AufgabeSolution of the task
Die Aufgabe wird durch eine Vorrichtung gemäß Anspruch 1 sowie mittels eines Verfahrens gemäß Anspruch 8 gelöst.The object is achieved by a device according to claim 1 and by means of a method according to
Vorteile der ErfindungAdvantages of the invention
Erfindungsgemäß vorteilhaft umfasst die Vorrichtung zur Kennfeldstabilisierung eines Verdichters ein an dessen Eintrittsbereich angeordnetes bewegliches Element, welches einstellbar einen Teilbereich der stirnseitigen Anströmfläche eines Laufrades überdeckt. Der Einstellbereich ist dabei zwischen keiner Überdeckung, bei welcher der gesamte stirnseitige Anströmbereich freigegeben ist, und der Abdeckung eines Großteils des Einströmbereiches variierbar.According to the invention advantageously comprises the device for map stabilization of a compressor arranged at the inlet region of the movable element, which covers an adjustable portion of the frontal inflow surface of an impeller. The adjustment range is variable between no overlap, in which the entire frontal inflow region is released, and the cover of a large part of the inflow region.
Das bewegliche Element im Eintrittsbereich des Verdichters ist in vorteilhafter Ausgestaltung als an der Gehäuseinnenwand angeordneter Konus mit einem variierbaren Winkel ausgebildet. Der Winkel des Konus kann zur Einstellung des Überdeckungsbereiches während des Betriebs des Verdichters variiert werden.The movable element in the inlet region of the compressor is formed in an advantageous embodiment as arranged on the housing inner wall cone with a variable angle. The angle of the cone can be varied to adjust the coverage area during operation of the compressor.
In einer vorteilhaften Ausführungsform ist der Winkel des Konus in einem Bereich zwischen 0° und 45° variierbar. Dabei verringert sich die wirksame Umfangsgeschwindigkeit des Verdichterlaufrads und gleichzeitig erhöht sich die Strömungsgeschwindigkeit unmittelbar an den Schaufelvorderkanten. Der Einströmwinkel wird dadurch zwischen dem Luftstrom und den Schaufelvorderkanten in Richtung Optimum verschoben. Die Strömungsablösungen sinken und damit auch die Neigung zum Verdichterpumpen.In an advantageous embodiment, the angle of the cone is variable in a range between 0 ° and 45 °. In this case, the effective peripheral speed of the compressor wheel decreases and at the same time the flow speed increases directly at the blade leading edges. The inflow angle is thereby shifted between the air flow and the blade leading edges towards optimum. The flow separation decreases and thus also the tendency for compressor pumps.
Mittels des erfindungsgemäßen Verfahrens erfolgt die Variation des Winkels des Konus abhängig von Betriebsgrößen des Verdichters während dessen Betriebs.By means of the method according to the invention, the variation of the angle of the cone depends on operating variables of the compressor during its operation.
Mittels der Variation des Winkelbereichs sind sowohl hohe Maximaldurchsätze als auch eine Verschiebung der Pumpgrenze zu niedrigeren Durchsätzen erzielbar. Des Weiteren kann auch eine Laststeuerung eines Verbrennungsmotors erzielt werden, wodurch die Drosselklappe eines Ottomotors entfällt.By means of the variation of the angular range, both high maximum throughputs and a shift of the surge limit to lower throughputs can be achieved. Furthermore, a load control of an internal combustion engine can be achieved, whereby the throttle valve of a gasoline engine is eliminated.
In vorteilhaften Ausführungsformen des Verfahrens erfolgt die Variation des Winkels abhängig vom Verdichtermassenstrom, von der Strömungsgeschwindigkeit oder von der Temperatur unmittelbar vor dem Verdichter.In advantageous embodiments of the method, the variation of the angle is dependent on the compressor mass flow, the flow rate or the temperature immediately before the compressor.
Zeichnungendrawings
Es zeigen:Show it:
In der
Bei einem Winkel α von 0° (in
Die Steuerung des Medienanschlusses
Der Winkel α des in der
Bei dem in der
BezugszeichenlisteLIST OF REFERENCE NUMBERS
- 11
- Verdichtercompressor
- 22
- Gehäusecasing
- 33
- Konuscone
- 44
- Medienanschlussmedia connection
- 55
- LaufradWheel
- 66
- BereichArea
- 77
- Verschiebbarer RingSliding ring
- 88th
- Lamellenslats
- 99
- Elastischer RingElastic ring
- 1010
- Zylindrisches ElementCylindrical element
- αα
- Winkelangle
Claims (9)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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DE102010026176.9A DE102010026176B4 (en) | 2010-07-06 | 2010-07-06 | Device and method for map stabilization of a compressor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102010026176.9A DE102010026176B4 (en) | 2010-07-06 | 2010-07-06 | Device and method for map stabilization of a compressor |
Publications (2)
Publication Number | Publication Date |
---|---|
DE102010026176A1 DE102010026176A1 (en) | 2012-01-12 |
DE102010026176B4 true DE102010026176B4 (en) | 2015-12-17 |
Family
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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DE102010026176.9A Expired - Fee Related DE102010026176B4 (en) | 2010-07-06 | 2010-07-06 | Device and method for map stabilization of a compressor |
Country Status (1)
Country | Link |
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DE (1) | DE102010026176B4 (en) |
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KR101951074B1 (en) * | 2013-02-28 | 2019-02-21 | 폭스바겐 악티엔 게젤샤프트 | Internal combustion engine |
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CN109707501B (en) * | 2017-10-25 | 2021-03-12 | 大众汽车有限公司 | Compressor, exhaust gas turbocharger, and internal combustion engine |
CN109707501A (en) * | 2017-10-25 | 2019-05-03 | 大众汽车有限公司 | Compressor, exhaust-driven turbo-charger exhaust-gas turbo charger and internal combustion engine |
DE202018106027U1 (en) | 2018-02-09 | 2019-05-13 | BMTS Technology GmbH & Co. KG | compressor |
DE102018202066A1 (en) | 2018-02-09 | 2019-08-14 | BMTS Technology GmbH & Co. KG | compressor |
WO2019170280A1 (en) | 2018-03-09 | 2019-09-12 | Ihi Charging Systems International Gmbh | Air-guiding section for an exhaust gas turbocharger, and exhaust gas turbocharger |
DE112019001219B4 (en) | 2018-03-09 | 2023-10-19 | Ihi Charging Systems International Gmbh | Air guide section for an exhaust gas turbocharger and exhaust gas turbocharger |
WO2019185188A1 (en) | 2018-03-29 | 2019-10-03 | Ihi Charging Systems International Gmbh | Air-guiding section for an exhaust-gas turbocharger, and exhaust-gas turbocharger |
DE102018107580A1 (en) | 2018-03-29 | 2019-10-02 | Ihi Charging Systems International Gmbh | Air duct section for an exhaust gas turbocharger and turbocharger |
DE102018209558A1 (en) | 2018-06-14 | 2019-12-19 | BMTS Technology GmbH & Co. KG | RADIAL COMPRESSOR |
DE102018115843A1 (en) | 2018-06-29 | 2020-01-02 | Ihi Charging Systems International Gmbh | Adjustment unit for a cross-sectional change unit, in particular for an air duct section of an exhaust gas turbocharger, air duct section for an exhaust gas turbocharger and exhaust gas turbocharger |
DE102018115839A1 (en) | 2018-06-29 | 2020-01-02 | Ihi Charging Systems International Gmbh | Air duct section for an exhaust gas turbocharger and exhaust gas turbocharger |
DE102018212285A1 (en) * | 2018-07-24 | 2020-01-30 | Audi Ag | Compressor for a drive unit, exhaust gas turbocharger for a drive unit and method for operating a compressor |
DE102018212285B4 (en) | 2018-07-24 | 2021-11-25 | Audi Ag | Compressor for a drive unit, exhaust gas turbocharger for a drive unit and method for operating a compressor |
DE102020125983A1 (en) | 2020-10-05 | 2022-04-07 | Iav Gmbh Ingenieurgesellschaft Auto Und Verkehr | Variable geometry compressor inlet |
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