DE102010050163A1 - Displacement machine for combustion engine of motor vehicle, has nozzle that is arranged at one end of return line to re-circulate pressurized fluid injected in direction of suction opening so that displacement is accelerated - Google Patents
Displacement machine for combustion engine of motor vehicle, has nozzle that is arranged at one end of return line to re-circulate pressurized fluid injected in direction of suction opening so that displacement is accelerated Download PDFInfo
- Publication number
- DE102010050163A1 DE102010050163A1 DE201010050163 DE102010050163A DE102010050163A1 DE 102010050163 A1 DE102010050163 A1 DE 102010050163A1 DE 201010050163 DE201010050163 DE 201010050163 DE 102010050163 A DE102010050163 A DE 102010050163A DE 102010050163 A1 DE102010050163 A1 DE 102010050163A1
- Authority
- DE
- Germany
- Prior art keywords
- displacement
- return line
- suction
- nozzle
- pressure
- 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.)
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
- F04C15/0042—Systems for the equilibration of forces acting on the machines or pump
- F04C15/0049—Equalization of pressure pulses
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C14/00—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations
- F04C14/24—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations characterised by using valves controlling pressure or flow rate, e.g. discharge valves or unloading valves
- F04C14/26—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations characterised by using valves controlling pressure or flow rate, e.g. discharge valves or unloading valves using bypass channels
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2/00—Rotary-piston machines or pumps
- F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
- F04C2/12—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
- F04C2/14—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2/00—Rotary-piston machines or pumps
- F04C2/30—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
- F04C2/34—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in groups F04C2/08 or F04C2/22 and relative reciprocation between the co-operating members
- F04C2/344—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in groups F04C2/08 or F04C2/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2270/00—Control; Monitoring or safety arrangements
- F04C2270/13—Noise
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Rotary Pumps (AREA)
- Details And Applications Of Rotary Liquid Pumps (AREA)
Abstract
Description
Technisches GebietTechnical area
Die vorliegende Erfindung betrifft eine Verdrängermaschine mit reduzierten Betriebsgeräuschen, zum Beispiel für den Einsatz in Verbrennungsmotoren von Kraftfahrzeugen.The present invention relates to a displacement machine with reduced operating noise, for example for use in internal combustion engines of motor vehicles.
Stand der TechnikState of the art
Verdrängermaschinen werden je nach Art ihres Verdrängerprinzipes unterschieden. Hauptmerkmal der Verdrängermaschine ist die zyklische Veränderung der Zellenvolumina, welche die Verdrängerwirkung bei Verkleinerung des Zellvolumens bewirkt. Durch die Vergrößerung der Zellvolumen wird ein Saugeffekt erzeugt.Displacement machines are differentiated depending on the nature of their displacement principle. The main feature of the displacement machine is the cyclic change in the cell volumes, which causes the displacement effect when reducing the cell volume. Increasing the cell volume creates a suction effect.
Als Umlaufverdrängermaschinen werden Pumpen benannt, die eine Druckflüssigkeit durch eine gleichförmige Drehung der Zellen, deren Volumen zyklisch geändert wird, von einem Saugraum zu einem Druckraum fördern. Als Verdrängerelemente kommen dabei Zähne, zum Beispiel in Zahnradpumpen mit Innen- oder Außenverzahnungen, oder auch Flügel, zum Beispiel in Flügelzellenpumpen, zum Einsatz.As circulation displacement machines, pumps are named which convey a pressure fluid from a suction space to a pressure space by a uniform rotation of the cells whose volume is cyclically changed. In this case, teeth are used as displacement elements, for example in gear pumps with internal or external toothings, or else vanes, for example in vane pumps.
Andererseits werden Pumpen als Hubverdrängermaschinen bezeichnet, bei denen die Veränderung eines Zellenvolumens durch einen längsbewegten Kolben erfolgt.On the other hand, pumps are referred to as Hubverdrängermaschinen in which the change of a cell volume is effected by a longitudinally moving piston.
Durch die ungleichförmige Förderung der Druckflüssigkeit über die Zellvolumina ergeben sich beim Betrieb dieser Verdrängermaschinen Druckpulsationen, die eine dynamische Belastung und auch eine Geräuschentwicklung hervorrufen. Diese Geräusche werden als Störgeräusche wahrgenommen. Weiterhin kann auf der Saugseite durch den periodischen Druckabfall unter die Kavitationsgrenze erhöhter Verschleiß durch Erosion auftreten. Diese Druckpulsationen treten bei kalter, aber auch bei betriebswarmer Druckflüssigkeit auf.Due to the non-uniform promotion of the pressure fluid over the cell volumes resulting in the operation of these displacement machines pressure pulsations, which cause a dynamic load and noise. These sounds are perceived as noise. Furthermore, increased wear due to erosion can occur on the suction side as a result of the periodic pressure drop below the cavitation limit. These pressure pulsations occur in cold, but also at operating pressure fluid.
Für die Verringerung dieser Druckpulsationen werden zum Beispiel Rückführungen oder Bypässe verwendet, welche die Druckflüssigkeit aus der Druckseite auf die Saugseite zurückführen. In den Rückführungen werden schaltbare Ventile verwendet, die synchron zur Pumpendrehzahl angesteuert werden, um die Druckpulsationen auf der Saugseite direkt zu beeinflussen.For the reduction of these pressure pulsations, for example, recirculations or bypasses are used, which return the pressure fluid from the pressure side to the suction side. The recirculation uses switchable valves that are controlled in synchronism with the pump speed to directly influence the pressure pulsations on the suction side.
In der Offenlegungsschrift
Aus der Patentschrift
In der Patentschrift
Die Patentschrift
In der europäischen Patentschrift
Die Verwendung von Rückführungen und die sich darin befindenden Schaltelemente und deren Steuerungen sowie Sensoren zur Detektierung der Druckpulsationen, um eine synchronisierte Ansteuerung der Schaltelemente zu ermöglichen, stellen einen erhöhten Materialeinsatz und Fertigungsaufwand sowie durch die Notwendigkeit der Steuerung einen erhöhten Kostenaufwand dar.The use of feedback and the therein switching elements and their controls and sensors for detecting the pressure pulsations to allow a synchronized control of the switching elements, represent an increased material usage and manufacturing costs and by the need for the control an increased cost.
Aufgabe der ErfindungObject of the invention
Die Aufgabe der Erfindung besteht darin, die Druckpulsationen einer Verdrängermaschine, die sich als Betriebsgeräusche äußern, auf einfache Weise zu reduzieren.The object of the invention is to reduce the pressure pulsations of a positive displacement machine, which manifest themselves as operating noise, in a simple manner.
Lösung der AufgabeSolution of the task
Die Aufgabe wird durch eine Vorrichtung mit den Merkmalen des Patentanspruches 1 gelöst.The object is achieved by a device having the features of
Beschreibung der Erfindung Description of the invention
Um den Zusatzaufwand zur Reduzierung der Druckpulsationen gering zu halten, wird eine einfache Rückführung vorgeschlagen, die aus einer Verbindung zwischen der Druck- und der Saugseite der Zahnradpumpe besteht.In order to keep the additional effort to reduce the pressure pulsations low, a simple feedback is proposed, which consists of a connection between the pressure and the suction side of the gear pump.
Für die Reduzierung der Druckpulsationen wird ein geringer Volumenstrom der Druckflüssigkeit aus dem Druckraum in den Saugraum zurückgeführt. Über eine Verjüngung am Ende der Rückführung, die zum Beispiel als Drossel in Form einer Düse ausgeführt sein kann, wird die rückgeführte Druckflüssigkeit in den Saugraum in Richtung der Saugöffnung in den Bereich der Entstehung der Druckpulsationen eingespritzt.To reduce the pressure pulsations, a small volume flow of the pressure fluid from the pressure chamber is returned to the suction chamber. Via a taper at the end of the recirculation, which can be designed, for example, as a throttle in the form of a nozzle, the recycled pressure fluid is injected into the suction chamber in the direction of the suction opening in the region of origin of the pressure pulsations.
Die träge Druckflüssigkeitssäule wird saugseitig durch die eingespritzte Druckflüssigkeit mitgerissen und in Richtung der Saugöffnung der Verdrängermaschine beschleunigt. Dadurch wird der durch die sich vergrößernden Zellvolumina erzeugte Druckabfall und demzufolge die Druckpulsationen reduziert. Diese Maßnahme reduziert auch die Druckpulsationen auf der Druckseite. Durch die ungeregelte Rückführung werden die Druckpulsationen auf der Saug- und Druckseite und somit auch die Geräuschentwicklung beziehungsweise die Störgeräusche reduziert.The sluggish pressure liquid column is entrained on the suction side by the injected pressure fluid and accelerated in the direction of the suction opening of the displacement machine. This reduces the pressure drop generated by the increasing cell volumes and, as a result, the pressure pulsations. This measure also reduces the pressure pulsations on the pressure side. The uncontrolled feedback reduces the pressure pulsations on the suction and pressure sides and thus also the development of noise or noise.
Als Beispiel konnten mit dieser Maßnahme im realen Betrieb die Pulsationen einer Außenzahnradpumpe in Verwendung als Schmierölpumpe in einer Verbrennungskraftmaschine um bis zu fünfzig Prozent reduziert werden.As an example, with this measure, in real operation, the pulsations of an external gear pump in use as a lubricating oil pump in an internal combustion engine could be reduced by up to fifty percent.
Ausführungsbeispiel VerdrängermaschineEmbodiment displacement machine
Beispielhaft wird hier eine Ausführung der erfindungsgemäßen Vorrichtung dargestellt. In der dazugehörigen Figur zeigt:By way of example, an embodiment of the device according to the invention is shown here. In the accompanying figure shows:
Die in
Zur Minderung oder vollständigen Kompensation der Pulsationen und in Folge dessen der Störgeräusche ist eine Rückführleitung
Ausführungsbeispiel ZahnradpumpeExemplary gear pump
Verdrängermaschinen werden in der Praxis verschiedenen Anwendungsbereichen zugeordnet. Beispielhaft wird hier eine Ausführung der erfindungsgemäßen Vorrichtung als Zahnradpumpe zur Schmiermittelförderung, wie sie in Verbrennungsmaschinen Verwendung findet, dargestellt. In der dazugehörigen Figur zeigt:Displacement machines are assigned in practice to different applications. By way of example, an embodiment of the device according to the invention is shown as a gear pump for lubricant delivery, as used in internal combustion engines. In the accompanying figure shows:
Die in
Zur Minderung oder vollständigen Kompensation der Störgeräusche ist eine Rückführleitung
BezugszeichenlisteLIST OF REFERENCE NUMBERS
- 11
- Gehäusecasing
- 22
- Zahnradgear
- 33
- Zahnradgear
- 44
- Saugseitesuction
- 5 5
- Druckseitepressure side
- 66
- RückführleitungReturn line
- 77
- Düsejet
- 88th
- Saugöffnungsuction opening
ZITATE ENTHALTEN IN DER BESCHREIBUNG QUOTES INCLUDE IN THE DESCRIPTION
Diese Liste der vom Anmelder aufgeführten Dokumente wurde automatisiert erzeugt und ist ausschließlich zur besseren Information des Lesers aufgenommen. Die Liste ist nicht Bestandteil der deutschen Patent- bzw. Gebrauchsmusteranmeldung. Das DPMA übernimmt keinerlei Haftung für etwaige Fehler oder Auslassungen.This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.
Zitierte PatentliteraturCited patent literature
- DD 275096 A1 [0007] DD 275096 A1 [0007]
- DE 3924482 C2 [0008] DE 3924482 C2 [0008]
- DE 19627437 C2 [0009] DE 19627437 C2 [0009]
- DE 19627438 C2 [0010] DE 19627438 C2 [0010]
- EP 0831231 B1 [0011] EP 0831231 B1 [0011]
Claims (6)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE201010050163 DE102010050163A1 (en) | 2010-10-30 | 2010-10-30 | Displacement machine for combustion engine of motor vehicle, has nozzle that is arranged at one end of return line to re-circulate pressurized fluid injected in direction of suction opening so that displacement is accelerated |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE201010050163 DE102010050163A1 (en) | 2010-10-30 | 2010-10-30 | Displacement machine for combustion engine of motor vehicle, has nozzle that is arranged at one end of return line to re-circulate pressurized fluid injected in direction of suction opening so that displacement is accelerated |
Publications (1)
Publication Number | Publication Date |
---|---|
DE102010050163A1 true DE102010050163A1 (en) | 2012-05-03 |
Family
ID=45935631
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE201010050163 Withdrawn DE102010050163A1 (en) | 2010-10-30 | 2010-10-30 | Displacement machine for combustion engine of motor vehicle, has nozzle that is arranged at one end of return line to re-circulate pressurized fluid injected in direction of suction opening so that displacement is accelerated |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE102010050163A1 (en) |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DD275096A1 (en) | 1988-08-26 | 1990-01-10 | Wolfen Filmfab Veb | ARRANGEMENT FOR PULSATION-FREE DOSING OF FLUIDS WITH GEAR PUMPS |
DE3924482C2 (en) | 1989-07-25 | 1991-05-16 | Robert Bosch Gmbh, 7000 Stuttgart, De | |
DE19627438C2 (en) | 1996-07-08 | 1998-04-23 | Danfoss As | Arrangement for setting the outlet pressure of a pump driven by a rotating motor |
DE19627437C2 (en) | 1996-07-08 | 1998-07-16 | Danfoss As | Control device for a pulsating pump |
EP0831231B1 (en) | 1996-09-19 | 2003-01-08 | Robert Bosch Gmbh | Gear pump |
-
2010
- 2010-10-30 DE DE201010050163 patent/DE102010050163A1/en not_active Withdrawn
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DD275096A1 (en) | 1988-08-26 | 1990-01-10 | Wolfen Filmfab Veb | ARRANGEMENT FOR PULSATION-FREE DOSING OF FLUIDS WITH GEAR PUMPS |
DE3924482C2 (en) | 1989-07-25 | 1991-05-16 | Robert Bosch Gmbh, 7000 Stuttgart, De | |
DE19627438C2 (en) | 1996-07-08 | 1998-04-23 | Danfoss As | Arrangement for setting the outlet pressure of a pump driven by a rotating motor |
DE19627437C2 (en) | 1996-07-08 | 1998-07-16 | Danfoss As | Control device for a pulsating pump |
EP0831231B1 (en) | 1996-09-19 | 2003-01-08 | Robert Bosch Gmbh | Gear pump |
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R012 | Request for examination validly filed | ||
R016 | Response to examination communication | ||
R119 | Application deemed withdrawn, or ip right lapsed, due to non-payment of renewal fee |