EP0832361B1 - Vane cell pump - Google Patents
Vane cell pump Download PDFInfo
- Publication number
- EP0832361B1 EP0832361B1 EP96917505A EP96917505A EP0832361B1 EP 0832361 B1 EP0832361 B1 EP 0832361B1 EP 96917505 A EP96917505 A EP 96917505A EP 96917505 A EP96917505 A EP 96917505A EP 0832361 B1 EP0832361 B1 EP 0832361B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pressure
- throttle bore
- rotor
- pressure space
- bore
- 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
- 239000007921 spray Substances 0.000 claims description 5
- 238000007789 sealing Methods 0.000 claims description 2
- 230000001105 regulatory effect Effects 0.000 claims 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 210000003746 feather Anatomy 0.000 description 1
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
- F04C14/24—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
-
- 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
Definitions
- the invention relates to a vane pump with a in a housing mounted cam ring and a through a drive shaft drivable rotor with radial slots.
- Working slides are inserted in the radial slots, which slide along in a radially sealing manner in the cam ring. Between the cam ring, the rotor and the working slides are working chambers formed by control plates in axial direction are limited.
- the housing is one hand acted upon by the delivery pressure of a spring force
- Flow control valve built in the oil from a pressure chamber conducts a spray channel.
- Such a pump is for example from the DE-A-41 08 126 known.
- a throttle bore between the pressure chamber and the outlet channel provided with a throttle insert.
- This Throttle bore causes a falling characteristic of the flow over the speed. In many cases, however, it is desirable to have a constant flow characteristic preserved, for example when used in power steering systems.
- the invention has for its object a to achieve a horizontal curve.
- This task is solved by the feature characterized in the claim.
- the throttle bore seated in the outlet duct has a frustoconical flattening towards the Pressure room. Due to the truncated cone-shaped flattening in the Form of a convex truncated cone protruding into the pressure chamber the inflow of the oil into the throttle bore so influenced that the desired constant, horizontal Characteristic curve arises.
- the length of the throttle bore will be another Achieved viscosity dependency, making one better Cold start behavior of the pump is maintained.
- the vane pump is used to deliver pressure oil from a container, not shown, to a not shown Consumers, for example an auxiliary steering system.
- an oil-filled pressure chamber 1 a housing 2, a rotor set 3 is used.
- the rotor set 3 consists of a cam ring 4 and a rotor 5.
- the rotor 5 is arranged in the interior of the cam ring 4 and has radially directed slots in which wings 6 are movable. Between the cam ring 4, the rotor 5 and the wings 6 are working chambers formed by Control surfaces of adjacent control plates 7 and 8 in axial Direction are limited.
- the pump corresponds to a double stroke Execution.
- the housing 2 is composed of a bearing housing 10 and a Pot-shaped housing cover 11 assembled.
- the rotor 5 sits rotatably on a drive shaft 12, which is in the Bearing housing 10 supports.
- the bearing in the bearing gear shaft rather is based on the housing cover 11 in axial direction.
- a flow control valve 13 for the control of the the pressure connection led pressure oil provided.
- Training the flow control valve 13 and one more existing, not visible pressure relief valve generally known, for example from US Pat. No. 5,098,259 and is therefore not described in detail.
- they are Pressure channels that connect the working chambers with the flow control valve 13 and connect the pressure relief valve in which Bearing housing 10 arranged. These channels are also general known and are therefore not described in detail.
- the control plate 7 has a throttle bore 14 with a truncated cone-shaped flattening 23.
- the truncated cone-shaped flattening 23 is designed such that a convex truncated cone, which surrounds the throttle bore 14, projects from the pressure plate 7 into the pressure chamber 1.
- the flattening 23 hinders a speed-dependent outflow in the throttle bore 14 and acts, so to speak, as a variable orifice. The higher the flow rate, the lower the mass flow. This effect results from the fact that the flow from the pressure chamber into the throttle bore 14 is deflected more strongly by the truncated cone-shaped flattening 23. With increasing flow velocity, there is a hydraulic reduction in cross-section at the entry into the throttle bore 14.
- the throttle bore 14 and an opening 14A are connected to the pressure-carrying working chambers formed between the rotor 5, the cam ring 4 and the vanes 6.
- the delivery pressure prevails in pressure chamber 1.
- the delivery pressure is supplied to the consumer via the throttle bore 14 and the outlet channel 19.
- a piston bore 15 of the flow control valve 13 axially connects to the opening 14A.
- the piston bore 15 contains a control piston 17, on which a spring 16 inserted into the spring chamber 16A presses.
- the piston bore 15 is connected to an inlet 22 via a spray channel 25.
- the piston bore 15 is also connected to the outlet channel 19 via a bore 27.
- the flow control valve 13 works as follows: With increasing speed, the differential pressure increases due to the throttle bore 14 on the end face of the control piston 17 facing the opening 14A.
- the control piston 17 acts as a pressure compensator and moves against the force of the spring 16 and against the force of the outlet pressure behind the control piston to the left. In this case, the end face of the control piston 17 opens the spray channel 25. A partial flow thus returns to the feed side of the pump in a known manner. A horizontal useful current characteristic is thus obtained.
- the truncated cone-shaped flattening 23 can be variable Use with different bore diameters, bore lengths and cone angles. Furthermore, the throttle cone can be integrated in the control plate.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Rotary Pumps (AREA)
- Details And Applications Of Rotary Liquid Pumps (AREA)
Description
Die Erfindung betrifft eine Flügelzellenpumpe mit einem in einem Gehäuse gelagerten Kurvenring und einem durch eine Antriebswelle antreibbaren Rotor mit radialen Schlitzen. In die radialen Schlitze sind Arbeitsschieber eingesetzt, die im Kurvenring radial dichtend entlanggleiten. Zwischen dem Kurvenring, dem Rotor und den Arbeitsschiebern sind Arbeitskammern gebildet, die durch Steuerplatten in axialer Richtung begrenzt sind. Im Gehäuse ist ein einerseits vom Förderdruck einer Federkraft beaufschlagtes Stromregelventil eingebaut, das Öl von einer Druckkammer in einen Abspritzkanal leitet. Außerdem ist eine weitere Drosselverbindung von dem Druckraum zu einem Auslaßkanal vorgesehen.The invention relates to a vane pump with a in a housing mounted cam ring and a through a drive shaft drivable rotor with radial slots. Working slides are inserted in the radial slots, which slide along in a radially sealing manner in the cam ring. Between the cam ring, the rotor and the working slides are working chambers formed by control plates in axial direction are limited. In the housing is one hand acted upon by the delivery pressure of a spring force Flow control valve built in, the oil from a pressure chamber conducts a spray channel. There is also another throttle connection provided from the pressure chamber to an outlet channel.
Eine derartige Pumpe ist beispielsweise aus der DE-A-41 08 126 bekannt. In der Steuerplatte dieser Pumpe ist zwischen dem Druckraum und dem Auslaßkanal eine Drosselbohrung mit einem Drosseleinsatz vorgesehen. Diese Drosselbohrung bewirkt eine fallende Kennlinie des Förderstroms über der Drehzahl. In vielen Fällen ist es jedoch wünschenswert, eine konstante Förderstromkennlinie zu erhalten, zum Beispiel bei der Anwendung in Hilfskraftlenkungen.Such a pump is for example from the DE-A-41 08 126 known. In the control plate of this pump is a throttle bore between the pressure chamber and the outlet channel provided with a throttle insert. This Throttle bore causes a falling characteristic of the flow over the speed. In many cases, however, it is desirable to have a constant flow characteristic preserved, for example when used in power steering systems.
Der Erfindung liegt die Aufgabe zugrunde, einen waagerechten Verlauf der Kennlinie zu erreichen. Diese Aufgabe ist durch das im Anspruch gekennzeichnete Merkmal gelöst. Die in dem Auslaßkanal sitzende Drosselbohrung hat eine kegelstumpfförmige Abflachung in Richtung auf den Druckraum. Durch die kegelstumpfförmige Abflachung in der Form eines in den Druckraum hineinragenden konvexen Kegelstumpfes wird die Einströmung des Öles in die Drosselbohrung so beeinflußt, daß die gewünschte konstante, waagerechte Kennlinie entsteht. Durch die Länge der Drosselbohrung wird noch eine Viskositätsabhängigkeit erzielt, wodurch man ein besseres Kaltstartverhalten der Pumpe erhält.The invention has for its object a to achieve a horizontal curve. This task is solved by the feature characterized in the claim. The throttle bore seated in the outlet duct has a frustoconical flattening towards the Pressure room. Due to the truncated cone-shaped flattening in the Form of a convex truncated cone protruding into the pressure chamber the inflow of the oil into the throttle bore so influenced that the desired constant, horizontal Characteristic curve arises. By the length of the throttle bore will be another Achieved viscosity dependency, making one better Cold start behavior of the pump is maintained.
Nachfolgend ist die Erfindung anhand der Zeichnung
näher erläutert.
Diese zeigt in:
- Fig. 1
- einen Längsschnitt durch eine erfindungsgemäße Flügelzellenpumpe und in
- Fig. 2
- die Abflachung der Drosselbohrung in der Vergrößerung.
This shows in:
- Fig. 1
- a longitudinal section through a vane pump according to the invention and in
- Fig. 2
- the flattening of the throttle bore in the enlargement.
Die Flügelzellenpumpe dient zum Fördern von Drucköl
aus einem nicht dargestellten Behälter zu einem nicht dargestellten
Verbraucher, beispielsweise einer Hilfskraftlenkung.
In der Zeichnung ist in einem ölgefüllten Druckraum 1
eines Gehäuses 2 ein Rotorensatz 3 eingesetzt. Der Rotorensatz
3 besteht aus einem Kurvenring 4 und einem Rotor 5.
Der Rotor 5 ist im Inneren des Kurvenrings 4 angeordnet und
weist radial gerichtete Schlitze auf, in denen Flügel 6
verschiebbar sind. Zwischen dem Kurvenring 4, dem Rotor 5
und den Flügeln 6 sind Arbeitskammern gebildet, die von
Steuerflächen benachbarter Steuerplatten 7 und 8 in axialer
Richtung begrenzt sind. Die Pumpe entspricht einer doppelhubigen
Ausführung.The vane pump is used to deliver pressure oil
from a container, not shown, to a not shown
Consumers, for example an auxiliary steering system.
In the drawing, an oil-filled pressure chamber 1
a
Das Gehäuse 2 ist aus einem Lagergehäuse 10 und einem
topfförmigen Gehäusedeckel 11 zusammengesetzt. Der Rotor 5
sitzt drehfest auf einer Antriebswelle 12, die sich in dem
Lagergehäuse 10 abstützt. Die Lagerstelle in dem Lagergetriebswelle
stützt sich vielmehr an dem Gehäusedeckel 11 in
axialer Richtung ab.The
Neben einem nicht sichtbaren Sauganschluß für den Anschluß
des Behälters sowie einem gleichfalls nicht sichtbaren
Druckanschluß für den Verbraucher ist in dem Lagergehäuse
10 ein Stromregelventil 13 für die Regelung des zu
dem Druckanschluß geführten Drucköls vorgesehen. Die Ausbildung
des Stromregelventils 13 und eines außerdem noch
vorhandenen, nicht sichtbaren Druckbegrenzungsventils ist
allgemein bekannt, beispielsweise aus der US-PS 5 098 259
und wird daher nicht näher beschrieben. Ebenso sind die
Druckkanäle, die die Arbeitskammern mit dem Stromregelventil
13 und dem Druckbegrenzungsventil verbinden, in dem
Lagergehäuse 10 angeordnet. Auch diese Kanäle sind allgemein
bekannt und werden deshalb nicht näher beschrieben.In addition to an invisible suction connection for the connection
of the container and one that is also not visible
Pressure connection for the consumer is in the bearing housing
10 a
Nach der Erfindung hat die Steuerplatte 7 eine Drosselbohrung
14 mit einer kegelstumpfförmigen Abflachung 23.
Die kegelstumpfförmige Abflachung 23 ist derart ausgebildet,
daß ein konvexer Kegelstumpf, der die Drosselbohrung
14 umgibt, von der Druckplatte 7 in den Druckraum 1
vorragt. Die Abflachung 23 behindert einen drehzahlabhängigen
Abfluß in der Drosselbohrung 14 und wirkt sozusagen
als variable Blende. Je höher die Strömungsgeschwindigkeit,
desto geringer wird der Mengendurchfluß. Diese Wirkung ergibt
sich dadurch, daß die Strömung aus dem Druckraum in
die Drosselbohrung 14 durch die kegelstumpfförmige Abflachung
23 stärker umgelenkt wird. Mit zunehmender Strömungsgeschwindigkeit
ergibt sich eine hydraulische Querschnittsverkleinerung
am Eintritt in die Drosselbohrung 14.
Die Drosselbohrung 14 und ein Durchbruch 14A stehen mit den
zwischen dem Rotor 5, dem Kurvenring 4 und den Flügeln 6
gebildeten druckführenden Arbeitskammern in Verbindung. Im
Druckraum 1 herrscht dabei der Förderdruck. Der Förderdruck
wird dabei über die Drosselbohrung 14 und den Auslaßkanal
19 dem Verbraucher zugeführt. An den Durchbruch 14A
schließt axial eine Kolbenbohrung 15 des Stromregelventils
13 an. Die Kolbenbohrung 15 enthält einen Regelkolben
17, auf den eine in den Federraum 16A eingesetzte Feder
16 drückt. Die Kolbenbohrung 15 steht über einen
Abspritzkanal 25 mit einem Einlaß 22 in Verbindung. Die
Kolbenbohrung 15 steht weiterhin über eine
Bohrung 27 mit dem Auslaßkanal 19 in Verbindung. Das Stromregelventil
13 arbeitet wie folgt:
Mit steigender Drehzahl nimmt der Differenzdruck wegen der
Drosselbohrung 14 auf die dem Durchbruch 14A zugewandte
Stirnfläche des Regelkolbens 17 zu. Der Regelkolben 17
wirkt als Druckwaage und verschiebt sich gegen die Kraft
der Feder 16 und gegen die Kraft des hinter dem Regelkolben
herrschenden Auslaßdruckes nach links. Dabei öffnet die
Stirnfläche des Regelkolbens 17 den Abspritzkanal 25. Ein
Teilstrom gelangt somit in bekannter Weise wieder auf die
Zulaufseite der Pumpe. Man erhält somit eine waagerechte
Nutzstromkennlinie.According to the invention, the control plate 7 has a
With increasing speed, the differential pressure increases due to the throttle bore 14 on the end face of the
Die kegelstumpfförmige Abflachung 23 kann als variabler
Einsatz mit verschiedenen Bohrungsdurchmessern, Bohrungslängen
und Kegelwinkeln ausgeführt sein. Ferner kann
der Drosselkegel in der Steuerplatte integriert sein. The truncated cone-
- 11
- DruckraumPressure room
- 22nd
- Gehäusecasing
- 33rd
- RotorsatzRotor set
- 44th
- KurvenringCurve ring
- 55
- Rotorrotor
- 66
- Flügelwing
- 77
- SteuerplatteControl plate
- 88th
- SteuerplatteControl plate
- 99
- --
- 1010th
- LagergehäuseBearing housing
- 1111
- GehäusedeckelHousing cover
- 1212th
- Antriebswelledrive shaft
- 1313
- StromregelventilFlow control valve
- 1414
- DrosselbohrungThrottle bore
- 14A14A
- Durchbruchbreakthrough
- 1515
- KolbenbohrungPiston bore
- 1616
- Federfeather
- 16A16A
- FederraumSpring chamber
- 1717th
- RegelkolbenControl piston
- 1818th
- --
- 1919th
- AuslaßkanalExhaust duct
- 2020th
- --
- 2121
- --
- 2222
- EinlaßInlet
- 2323
- AbflachungFlattening
- 2424th
- --
- 2525th
- AbspritzkanalSpray channel
- 2626
- --
- 2727
- Bohrungdrilling
Claims (1)
- Vane pump with the following features:characterised in that the throttle bore (14) in the control plate (7) has a frustoconical flattening (23) directed towards the pressure space (1) such that a convex cone frustum, which surrounds the throttle bore (14), projects into the pressure space (1).a curved ring (4) is mounted in a casing (2);a rotor (5), which can be driven by a drive shaft (12), has radial slots in which working vanes sliding in sealing fashion along the curved ring (4) are inserted;working chambers which are defined by control plates (7, 8) in the axial direction are formed between the curved ring (4), the rotor (5) and the working vanes;a flow regulating valve (13) which is subjected on one side to the delivery pressure and on the other to the outlet pressure plus a spring force is fitted in the casing (2), which valve routes oil from a pressure space (1) to a spray passage (25);a throttle bore (14) leading from the pressure space (1) to an outlet passage (19) is provided in one of the control plates,
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19521635A DE19521635A1 (en) | 1995-06-14 | 1995-06-14 | Vane pump |
| DE19521635 | 1995-06-14 | ||
| PCT/EP1996/002484 WO1997000380A1 (en) | 1995-06-14 | 1996-06-07 | Vane cell pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0832361A1 EP0832361A1 (en) | 1998-04-01 |
| EP0832361B1 true EP0832361B1 (en) | 1999-12-29 |
Family
ID=7764366
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP96917505A Expired - Lifetime EP0832361B1 (en) | 1995-06-14 | 1996-06-07 | Vane cell pump |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US6000914A (en) |
| EP (1) | EP0832361B1 (en) |
| JP (1) | JPH11507708A (en) |
| KR (1) | KR100415901B1 (en) |
| BR (1) | BR9608583A (en) |
| DE (2) | DE19521635A1 (en) |
| WO (1) | WO1997000380A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19717794C2 (en) * | 1997-04-26 | 1999-06-17 | Zahnradfabrik Friedrichshafen | Positive displacement pump |
| JP3543733B2 (en) * | 2000-05-29 | 2004-07-21 | 日産自動車株式会社 | Resholm compressor for fuel cells |
| KR101692773B1 (en) * | 2015-06-09 | 2017-01-05 | 명화공업주식회사 | Vane pump |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3385220A (en) * | 1966-08-17 | 1968-05-28 | Eaton Yale & Towne | Fluid pump |
| US3989414A (en) * | 1975-03-26 | 1976-11-02 | Zahnradfabrik Friedrichshafen Ag | Pump for servo steering |
| US4298316A (en) * | 1978-05-01 | 1981-11-03 | Ford Motor Company | Power steering pump |
| US4207038A (en) * | 1978-05-01 | 1980-06-10 | Ford Motor Company | Power steering pump |
| JP2851903B2 (en) * | 1990-03-14 | 1999-01-27 | 株式会社ユニシアジェックス | Liquid pump |
-
1995
- 1995-06-14 DE DE19521635A patent/DE19521635A1/en not_active Ceased
-
1996
- 1996-06-07 WO PCT/EP1996/002484 patent/WO1997000380A1/en active IP Right Grant
- 1996-06-07 EP EP96917505A patent/EP0832361B1/en not_active Expired - Lifetime
- 1996-06-07 US US08/973,687 patent/US6000914A/en not_active Expired - Fee Related
- 1996-06-07 DE DE59604053T patent/DE59604053D1/en not_active Expired - Lifetime
- 1996-06-07 KR KR1019970709298A patent/KR100415901B1/en not_active IP Right Cessation
- 1996-06-07 JP JP9502601A patent/JPH11507708A/en not_active Ceased
- 1996-06-07 BR BR9608583A patent/BR9608583A/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| DE19521635A1 (en) | 1996-12-19 |
| DE59604053D1 (en) | 2000-02-03 |
| JPH11507708A (en) | 1999-07-06 |
| BR9608583A (en) | 1999-01-05 |
| WO1997000380A1 (en) | 1997-01-03 |
| EP0832361A1 (en) | 1998-04-01 |
| US6000914A (en) | 1999-12-14 |
| KR100415901B1 (en) | 2004-03-30 |
| KR19990022829A (en) | 1999-03-25 |
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