EP1087138B1 - Innenzahnradpumpen umfassendes Pumpenaggregat - Google Patents
Innenzahnradpumpen umfassendes Pumpenaggregat Download PDFInfo
- Publication number
- EP1087138B1 EP1087138B1 EP00117422A EP00117422A EP1087138B1 EP 1087138 B1 EP1087138 B1 EP 1087138B1 EP 00117422 A EP00117422 A EP 00117422A EP 00117422 A EP00117422 A EP 00117422A EP 1087138 B1 EP1087138 B1 EP 1087138B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pump
- drive shaft
- locking pin
- drive
- recess
- 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
- 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
- F04C14/06—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations specially adapted for stopping, starting, idling or no-load operation
-
- 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
- F04C2270/56—Number of pump/machine units in operation
Definitions
- the invention relates to a pump assembly comprising internal gear pumps. gat according to the preamble of claim 1.
- a pump unit is from the disclosure DE 196 20 700 known as the closest State of the art is unshackled.
- the invention is based on the not previously published German patent application 199 33 484.6.
- the two internal gear pumps comprises, one of which upon reaching a predetermined flow can be decoupled from the drive, which increases the power consumption reduced this pump set.
- the inner rotor is the one that can be switched off Gear pump with a device for controlled or regulated Disconnect his drive connection.
- This facility includes one in a recess of the inner rotor against spring force slidably guided locking pin, which with a rotary stop of the drive shaft of the inner rotor interacts and thus the controlled interruption the drive connection between the inner rotor and the drive shaft serves.
- this structurally simple device can be essentially by a radially arranged locking pin an interruption of the Drive connection controlled by centrifugal force, which is the least possible Effort on control device is achieved.
- centrifugal force Much more precise and in particular this mentioned facility can be controlled depending on the results, when the locking pin acts on the drive shaft with pump pressure is, so that at a sufficiently high pump pressure said drive connection is interrupted.
- Centrifugal influence is one of the locking bolts in the direction of the drive shaft to design a spring that moves towards the spring in such a way that when a certain pump delivery pressure is reached Locking bolt unlocks the drive connection, after which only the other Gear pump continues to operate.
- tandem pump is the locking pin in a blind hole Recess led.
- a blind hole is difficult, however finished.
- this blind hole can have the necessary (ring) gap between the locking pin and the wall of this blind hole from the pump delivered fluid (especially lubricating oil) in the blind hole and thus in the space behind the locking pin, i.e. to that facing away from the drive shaft Side of the locking pin. Under unfavorable circumstances such a high fluid pressure or lubricating oil pressure can then occur in this space build up that the locking pin is no longer displaceable and thus the closed drive connection cannot be interrupted.
- the opening in the inner rotor into which the locking pin opens is inserted in or on the outer circumference of the inner rotor, i.e. on the outside.
- This recess to be made, for example simple drilling through the inner rotor in the radial direction from the outside to manufacture towards the center or the axis of rotation.
- simultaneously can on this now open to the outside recess on Locking pin over into the recess or into the space behind the locking pin fluid (especially lubricating oil) that is conveyed by the pump will be led out of this recess again, namely over the outer circumference of the inner rotor.
- This pressure relief valve enables the accumulation of a certain amount of fluid or lubricating oil in the recess behind the locking pin, but there is one when building certain fluid pressure in the recess, a drain opening through which then a portion of the accumulated fluid is discharged to the outside can be, until the fluid pressure below the Pressure limit value of the pressure relief valve has reduced.
- a pump unit 1 in particular for a lubrication system of an internal combustion engine, not shown, includes the gear pumps 2 and 3. These internal gear pumps 2 and 3, which are arranged separately in the pump unit 1, are equipped with coaxial, externally toothed internal rotors 4 and 5 (see FIG . 1 ).
- the inner rotor 5 is designed with a device 6 for controlled or regulated interruption of the drive connection.
- this device 6 comprises a locking pin 9, which is guided in a recess 7 of the inner rotor 5 against the force of a spring 8 in the direction of arrow 22 and which interacts with a rotary stop 10 of a drive shaft 11 (cf. also FIG. 4 ). and which serves for the controlled interruption of the drive connection between the inner rotor 5 and the drive shaft 11.
- the drive connection is closed in the position of the locking pin 9 shown, while when the locking pin 9 is lifted from the rotary stop 10 according to arrow direction 22, the drive connection is interrupted.
- the locking pin 9 is preferably arranged radially.
- the one with the Locking pin 9 cooperating rotary stop 10 is as a blind hole 12 designed in the drive shaft 11, the blind hole 12th with one of the directions of rotation of the drive shaft 11 opposite Insertion slot 13 for the locking pin 9 is connected.
- the insertion slot 13 with a transition ramp 14 from The circumference of the drive shaft 11 is formed in the blind hole-like rotary stop 10.
- an axial channel 15 which is arranged in the drive shaft 11 and which contains fluid (in particular lubricating oil) conveyed by the gear pump 2 under delivery pressure is connected to a radial channel 16, the radial channel 16 in the Blind hole 12 and thus opens below the locking pin 9.
- a radial channel 16 with interrupted drive connection between the drive shaft 11 and the inner rotor 5, the space between the inner rotor 5 and a so-called freewheel bearing 21, which is arranged in the form of a sliding ring between the drive shaft 11 and the inner rotor 5, and the or naturally has an unspecified passage opening for the locking pin 9, supplied with lubricating oil.
- the switching shock is also damped with the lubricating oil supplied via the radial channel 16 when the inner rotor 5 is coupled in a rotationally fixed manner to the drive shaft 11.
- the recess 7, in which the locking pin 9 is displaceably guided is designed in the form of a bore or the like penetrating the inner rotor 5 in the radial direction from its outer circumference to the center, that is to say generally as a through hole which is on the outer circumference of the inner rotor opens.
- This recess 7 can be produced particularly easily.
- a pressure relief valve 17 is also inserted into this recess 7 on the side of the locking bolt 9 facing away from the drive shaft 11. The latter is designed as a check valve.
- this pressure relief valve 17 Via this pressure relief valve 17, fluid (in particular lubricating oil) which flows from the radial channel 16 via the (ring) gap required for the displaceability of the locking pin 9 between the locking pin 9 and the wall of the recess 7 into the recess 7, ie into the space 23 passes between the locking pin 9 and the pressure relief valve 17, are discharged out of this space 23 beyond the outer circumference of the inner rotor.
- this pressure relief valve 17 designed as a check valve prevents fluid from the outside, ie from the area outside the outer circumference of the inner rotor under pump delivery pressure, from entering the recess 7 more precisely into the space 23. In this way it is ensured that there is no overpressure in the space 23 between the pressure relief valve 17 and the locking pin 9, so that the locking pin 9 can be moved freely (as already described) in the direction of arrow 22.
- the delivery line 18 of the gear pump 3, which can be switched off, opens into the delivery line 19 of the gear pump 2, which is always in operation.
- a check valve 20 blocking it is provided in the delivery line 19 associated with the gear pump 3 which can be switched off.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Rotary Pumps (AREA)
- Details And Applications Of Rotary Liquid Pumps (AREA)
Description
Die Lösung dieser Aufgabe ist dadurch gekennzeichnet, daß in die im Außenumfang des Innenrotors mündende Ausnehmung auf der der Antriebswelle abgewandten Seite des Sperrbolzens ein Druckentlastungsventil eingesetzt ist. Vorteilhafte Aus- und Weiterbildungen sind Inhalt der Unteransprüche.
- Figur 1
- einen Längsschnitt eines erfindungsgemäßen Pumpenaggregates mit zwei Innen-Zahnradpumpen in vereinfachter Darstellung,
- Figur 2
- eine Aufsicht auf den von der Antriebswelle abkuppelbaren Innenrotor dieses Pumpenaggregates,
- Figur 3
- als Ausschnitt aus Figur 2 die Einrichtung zur Unterbrechung der Antriebsverbindung in vergrößerter Darstellung ohne Pumpen-Antriebswelle,
- Figur 4
- als Ausschitt aus Figur 2 lediglich die (in einem Querschitt dargestellte) Pumpen-Antriebswelle, sowie
- Figur 5
- die Ansicht A aus Figur 4, wobei hierin der die Figur 4 bildende Schnitt B-B gekennzeichnet ist.
- 1
- Pumpenaggregat
- 2, 3
- Innen-Zahnradpumpe
- 4, 5
- Innenrotor
- 6
- Einrichtung zur Unterbrechung der Antriebsverbindung
- 7
- Ausnehmung
- 8
- Feder
- 9
- Sperrbolzen
- 10
- Drehanschlag
- 11
- Antriebswelle
- 12
- Sacklochbohrung
- 13
- Einführschlitz
- 14
- Übergangsrampe
- 15
- Axialkanal
- 16
- Radialkanal
- 17
- Druckentlastungsventil
- 18,19
- Förderleitung
- 20
- Rückschlagventil
- 21
- Freilauflager
- 22
- Pfeilrichtung
- 23
- Raum zwischen 9 und 17
- 24
- Nut
Claims (3)
- Innenzahnradpumpen umfassendes Pumpenaggregat, insbesondere für das Schmiersystem einer Brennkraftmaschine, wobei zumindest zwei gesondert angeordnete Innenzahnradpumpen (2,3) mit gleichachsigen, in Antriebsverbindung stehenden, außenverzahnten Innenrotoren (4,5) ausgerüstet sind und einer der Innenrotoren (5) mit einer Einrichtung (6) zur gesteuerten/geregelten Unterbrechung der Antriebsverbindung ausgebildet ist, dadurch gekennzeichnet, daß diese Einrichtung (6) einen in einer Ausnehmung (7) des Innenrotors (5) gegen die Kraft einer Feder (8) verschiebbar geführten und mit einem Drehanschlag (10) einer Antriebswelle (11) zusammenwirkenden Sperrbolzen (9) umfaßt, der von der Antriebswelle (11) her mit Pumpendruck beaufschlagt wird und bei ausreichend hohem Pumpendruck die Antriebsverbindung unterbricht, und daß in die im Außenumfang des Innenrotors (5) mündende Ausnehmung (7) auf der der Antriebswelle (11) abgewandten Seite des Sperrbolzens (9) ein Drückentlastungsventil (17) eingesetzt ist.
- Pumpenaggregat nach Anspruch 1,
dadurch gekennzeichnet, daß sich die den Sperrbolzen (9) in Richtung zur Antriebswelle (11) verschiebende Feder (8) am als Rückschlagventil ausgebildeten Druckentlastungsventil (17) abstützt. - Pumpenaggregat nach Anspruch 1 oder 2,
dadurch gekennzeichnet, daß in einer von der mit der Einrichtung (6) zur Unterbrechung der Antriebsverbindung versehenen Zahnradpumpe (3) wegführenden Förderleitung (18), die in der von der anderen Zahnradpumpe (2) wegführenden Förderleitung (19) mündet, ein zur erstgenannten Zahnradpumpe (3) hin sperrendes Rückschlagventil (20) vorgesehen ist.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19945922 | 1999-09-25 | ||
DE19945922A DE19945922A1 (de) | 1999-09-25 | 1999-09-25 | Innenzahnradpumpen umfassendes Pumpenaggregat |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1087138A2 EP1087138A2 (de) | 2001-03-28 |
EP1087138A3 EP1087138A3 (de) | 2002-07-10 |
EP1087138B1 true EP1087138B1 (de) | 2003-10-15 |
Family
ID=7923244
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00117422A Expired - Lifetime EP1087138B1 (de) | 1999-09-25 | 2000-08-11 | Innenzahnradpumpen umfassendes Pumpenaggregat |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP1087138B1 (de) |
DE (2) | DE19945922A1 (de) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10236746B2 (en) | 2015-12-15 | 2019-03-19 | Regal Beloit America, Inc. | Electric machine, lock and associated method |
US10711795B2 (en) | 2016-07-27 | 2020-07-14 | Regal Beloit America, Inc. | Cover assembly, blower assembly and associated method |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10059423A1 (de) * | 2000-11-30 | 2002-06-13 | Bosch Gmbh Robert | Vorrichtung zum Fördern von Flüssigkeiten, insbesondere Kraftstoff |
DE102004024728B3 (de) * | 2004-05-19 | 2006-03-30 | Audi Ag | Schalteinrichtung für mehrstufige Ölpumpen |
CN105179914B (zh) * | 2015-10-30 | 2017-09-26 | 浙江钱江摩托股份有限公司 | 一种机油泵 |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6067793A (ja) * | 1983-09-24 | 1985-04-18 | Sumitomo Electric Ind Ltd | 可変容量内接型歯車ポンプ |
DE4134219A1 (de) * | 1990-10-29 | 1992-04-30 | Volkswagen Ag | Zahnradpumpe mit veraenderbarem foerdervolumen |
DE19620700B4 (de) * | 1996-05-23 | 2004-09-23 | Iav Gmbh Ingenieurgesellschaft Auto Und Verkehr | Innenachsige Zahnradpumpe, vorzugsweise für die Schmierölversorgung von Verbrennungsmotoren |
FR2783575B1 (fr) * | 1998-09-22 | 2002-03-08 | Peugeot | Pompe a huile pour circuit de lubrification d'un moteur a combustion interne |
-
1999
- 1999-09-25 DE DE19945922A patent/DE19945922A1/de not_active Withdrawn
-
2000
- 2000-08-11 EP EP00117422A patent/EP1087138B1/de not_active Expired - Lifetime
- 2000-08-11 DE DE50004060T patent/DE50004060D1/de not_active Expired - Fee Related
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10236746B2 (en) | 2015-12-15 | 2019-03-19 | Regal Beloit America, Inc. | Electric machine, lock and associated method |
US10711795B2 (en) | 2016-07-27 | 2020-07-14 | Regal Beloit America, Inc. | Cover assembly, blower assembly and associated method |
Also Published As
Publication number | Publication date |
---|---|
EP1087138A2 (de) | 2001-03-28 |
EP1087138A3 (de) | 2002-07-10 |
DE50004060D1 (de) | 2003-11-20 |
DE19945922A1 (de) | 2001-03-29 |
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