EP0692073A1 - Pompe a engrenages pour le refoulement d'un liquide - Google Patents
Pompe a engrenages pour le refoulement d'un liquideInfo
- Publication number
- EP0692073A1 EP0692073A1 EP94913058A EP94913058A EP0692073A1 EP 0692073 A1 EP0692073 A1 EP 0692073A1 EP 94913058 A EP94913058 A EP 94913058A EP 94913058 A EP94913058 A EP 94913058A EP 0692073 A1 EP0692073 A1 EP 0692073A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- wall
- gear
- gears
- housing
- gear pump
- 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.)
- Withdrawn
Links
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
- 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
-
- 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
- F04C14/18—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations characterised by varying the volume of the working chamber
- F04C14/185—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations characterised by varying the volume of the working chamber by varying the useful pumping length of the cooperating members in the axial direction
-
- 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
- F04C2/18—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 with similar tooth forms
Definitions
- the invention relates to a gear pump for conveying a flowable medium. Reference is made to the preamble of claim 1.
- Gear pumps of this type are used for both stationary and mobile operation.
- the known advantages mainly consist in achieving high and very high pressures with a relatively precise volumetric dosage.
- DE 41 21 074 AI describes an external gear pump with a continuously variable flow rate.
- two gear wheels which are displaceable relative to one another are provided.
- the driven gear is mounted in a housing, while the rotating gear is adjusted depending on the fluid pressure difference applied to the pump.
- the invention has for its object to design a gear pump according to the preamble of claim 1, that their main purpose of easily and quickly changing the flow rate during operation is perfectly fulfilled, but that the seal is less exposed to wear than previously known gear pumps, and that the construction effort is kept within limits.
- the following can be achieved in this way: Simply by moving two meshing gears in the axial direction relative to one another, and thus by changing the mutual degree of coverage, the delivery rate can be varied.
- the pump has only rotating parts, no impact parts.
- the pump can be geometrically reduced or enlarged. Basically, the same or the same components can be used when manufacturing series; to change the maximum flow rate you only need to change the overall length of the main components.
- Fig. 1 shows a pump equipped with two gears in a longitudinal section.
- 2 to 5 are cross sections in the planes A-A, B-B, C-C and in the offset planes D-D.
- Fig. 6 shows in an enlarged, perspective
- Fig. 7 shows the pump in three different operating states.
- 8 shows a further embodiment of a gear pump according to the invention with two fixed gear wheels which are coaxial with one another and with a displaceable gear wheel which is axially parallel to the first two.
- the gear pump shown in Figures 1 to 6 has two gears 1 and 2. These are arranged axially parallel to each other and mesh with each other over part of their length.
- a housing 3 is provided
- Figure 6 shows that the movable partition 8 not only serves to limit and seal the work space, but also has a bearing function for gear 2.
- 6 shows the wall 8 in detail, a radial bearing 8.1 carried by it, a seal 8.2 for sealing the tooth contour against the radial bearing 8.1, a shaft seal 8.3 and a seal 8.4 for sealing the displaceable wall 8 against the peripheral wall 3.2 of the
- chambers 20, 21, 22 there are three chambers 20, 21, 22 in the housing 3.
- One of these chambers, namely chamber 21, is located within the bridge 9. It is advantageous that the two chambers 21 and 22 are under pressure.
- the walls 6 and 8 and thus also the circumferential seals 8.2, 8.3 and 8.4 are also pressurized from the outside, which relieves all seals between the fixed and the moving parts. It is advantageous to establish a conductive connection between the chambers 21 and 22 so that one chamber can feed the other.
- FIG. 7 The mode of operation of this first embodiment of a gear pump according to the invention is shown in FIG. 7, with individual working positions resulting from FIGS. 7.1, 7.2 and 7.3.
- the mentioned slide with gear wheel 1 is brought into a middle position, the axial degree of overlap of the two gear wheels 1, 2 taking on an intermediate size. In this state, the volume delivered has an average value.
- the degree of coverage of the two gear wheels 1, 2 is as large as the construction of the pump allows.
- the slide, and thus also gear 1, have been shifted to the right as far as possible.
- the degree of coverage is maximum. Accordingly, the funding volume is also maximum.
- the carriage is controlled via the above-mentioned connections 10 and 11 by a corresponding pressurized control medium. This allows the carriage to be moved continuously and held in any position. It can be seen from this that a continuous adjustment of the delivery rate is possible during operation.
- the pump can be adjusted by externally generated or self-generated hydrostatic pressure, in the latter case only during operation.
- a pressure accumulator could be provided so that adjustment pressure is always available. This only needs to have minimal dimensions and can optionally be accommodated between the outer walls 3.1, 3.2 on the one hand and the bridge 9 on the other.
- Gear pump shown in Fig. 8, differs from the first in that a total of three gears are provided, namely a lower, axially displaceable gear 1 and two upper, fixed gears 2.1, 2.2, which are arranged coaxially to one another.
- a housing 3 with U initial walls 3.1, 3.2, end walls 3.3 and 3.4 and essentially all other components of the first embodiment.
- the advantage of this three-wheel embodiment is that there are two work spaces.
- the width of these working spaces is indicated by the reference symbols a- and a 2 .
- the working spaces are delimited by the two outer, displaceable end walls 7, 8 of the slide and by a fixed intermediate wall 6.
- the bottom of the tooth space is placed somewhat deeper radially inwards at the end of the individual gear on the working space side, the bottom falling off towards the end face of the gear in question. This enables perfect removal of squeeze oil into the low-pressure region 17.
- the invention can be applied not only to pumps, but also to hydrostatic motors.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Rotary Pumps (AREA)
Abstract
Une pompe ou un moteur à engrenages pour le refoulement d'un liquide a les caractéristiques suivantes: des roues dentées à axes parallèles (1, 2) s'engrènent deux par deux; un boîtier (3) renferme les roues dentées et comprend une paroi enveloppe (3.1, 3.2); une face interne de la paroi forme des fentes de refoulement avec les roues dentées, les fentes de refoulement s'étendant chacune sur une partie de la circonférence des engrenages; une chambre basse pression située dans la zone d'admission de la fente de refoulement comprend une admission et une chambre haute pression située dans la zone de sortie de la fente de refoulement comprend une sortie du milieu à refouler; une des roues dentées est rigidement fixé au boîtier, alors que l'autre est mobile dans la direction axiale. L'invention présente les caractéristiques suivantes: laroue dentée mobile (1) porte sur chacune de ses deux extrémités une paroi faciale (7, 8) qui lui est rigidement assujettie; les deux parois faciales (7, 8) s'appuient de façon étanche sur la surface interne de la paroi enveloppe (3.1, 3.2) du boîtier (3); la surface interne de la paroi est constituée d'une paroi (9) qui relie les deux parois faciales mobiles (7, 8) et qui forme avec celles-ci un chariot mobile dans le boîtier (3); la roue dentée fixe (2) porte à son extrémité libre une paroi frontale (6) qui lui est rigidement assujettie et qui s'appuie de façon étanche sur la surface interne de la paroi (9).
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4310518 | 1993-03-31 | ||
DE4310518A DE4310518C1 (de) | 1993-03-31 | 1993-03-31 | Zahnradpumpe zum Fördern eines fließfähigen Mediums |
PCT/EP1994/000961 WO1994023209A1 (fr) | 1993-03-31 | 1994-03-26 | Pompe a engrenages pour le refoulement d'un liquide |
Publications (1)
Publication Number | Publication Date |
---|---|
EP0692073A1 true EP0692073A1 (fr) | 1996-01-17 |
Family
ID=6484364
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP94913058A Withdrawn EP0692073A1 (fr) | 1993-03-31 | 1994-03-26 | Pompe a engrenages pour le refoulement d'un liquide |
Country Status (6)
Country | Link |
---|---|
US (1) | US5620315A (fr) |
EP (1) | EP0692073A1 (fr) |
JP (1) | JPH09502234A (fr) |
KR (1) | KR960702064A (fr) |
DE (1) | DE4310518C1 (fr) |
WO (1) | WO1994023209A1 (fr) |
Families Citing this family (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19947577A1 (de) * | 1999-10-01 | 2000-11-30 | Daimler Chrysler Ag | Stufenlos regelbare Fördereinrichtung |
US20070227802A1 (en) * | 2004-04-09 | 2007-10-04 | O'brien James A Ii | Hybrid earthmover |
US7281376B2 (en) * | 2005-02-22 | 2007-10-16 | Hybra-Drive Systems, Llc | Hydraulic hybrid powertrain system |
US8215932B2 (en) * | 2004-04-09 | 2012-07-10 | Limo-Reid, Inc. | Long life telescoping gear pumps and motors |
WO2005100780A2 (fr) * | 2004-04-09 | 2005-10-27 | Hybra-Drive Systems, Llc | Pompe/moteur a capacite variable |
NL1027440C2 (nl) * | 2004-11-08 | 2006-05-09 | Tjerk Kingma | Vloeistofpomp en werkwijze voor het verplaatsen van een vloeistof. |
US8011910B2 (en) * | 2005-02-22 | 2011-09-06 | Limo-Reid, Inc. | Low noise gear set for gear pump |
US7686601B2 (en) * | 2005-04-08 | 2010-03-30 | Limo-Reid, Inc. | High pressure telescoping gear pumps and motors |
JP5230971B2 (ja) * | 2006-08-15 | 2013-07-10 | 株式会社Tbk | ギヤポンプ |
US7717690B2 (en) * | 2006-08-15 | 2010-05-18 | Tbk Co., Ltd. | Gear pump |
IT1394335B1 (it) * | 2009-04-15 | 2012-06-06 | Vhit Spa | Macchina fluidica a capacita' variabile |
US20110129359A1 (en) * | 2009-11-30 | 2011-06-02 | Caterpillar Inc. | Variable output pump |
RU2010102009A (ru) * | 2010-01-25 | 2011-07-27 | Александр Владимирович Дидин (RU) | Объемная роторная машина (варианты) |
EP2558724A2 (fr) * | 2010-04-12 | 2013-02-20 | FIGURA, Pavol | Pompe a engrenages a debit de sortie variable"en continu |
US20120051950A1 (en) * | 2010-08-27 | 2012-03-01 | Chang Chun-Hsien | Engine oil pump provided automatic adjustment of oil supply amount |
CN105275787A (zh) * | 2014-07-16 | 2016-01-27 | 张龙 | 一种液压变量泵 |
WO2018048993A1 (fr) * | 2016-09-08 | 2018-03-15 | Nordson Corporation | Système et procédé de commande active de recirculation d'adhésif |
US10695779B2 (en) | 2016-09-08 | 2020-06-30 | Nordson Corporation | Applicator having active backpressure control devices |
US10464098B2 (en) * | 2016-09-08 | 2019-11-05 | Nordson Corporation | Remote metering station |
DE102021100341A1 (de) | 2021-01-12 | 2022-07-14 | Schaeffler Technologies AG & Co. KG | Außenzahnradmaschine |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE511495C (de) * | 1928-03-01 | 1930-10-30 | Valentin Retterath | Fluessigkeitsgetriebe |
US2633806A (en) * | 1947-02-08 | 1953-04-07 | Frank M Perkins | Hydraulic transmission |
FR1125992A (fr) * | 1955-05-07 | 1956-11-12 | Forges Chantiers Mediterranee | Perfectionnement aux pompes ou moteurs à engrenages |
FR1263424A (fr) * | 1960-04-30 | 1961-06-09 | Perfectionnements aux machines rotatives hydrauliques à engrenages et systèmes dérivés, en vue de rendre leur débit variable | |
US3588295A (en) * | 1969-08-29 | 1971-06-28 | Lowell E Burk | Variable output gear pump or motor apparatus |
FR2232956A5 (en) * | 1973-06-05 | 1975-01-03 | Snecma | Variable supply gear pump - has internally toothed ring on one gear preventing direct return of fluid |
DE3528651A1 (de) * | 1985-08-09 | 1987-02-19 | Rohs Hans Guenther Prof Dr Ing | Zahnradpumpe |
US5184947A (en) * | 1991-05-21 | 1993-02-09 | Dwight Coombe | Fully variable output hydraulic gear pump having an axially translatable gear |
DE4121074A1 (de) * | 1991-06-26 | 1993-01-07 | Pierburg Gmbh | Aussenzahnradpumpe |
-
1993
- 1993-03-31 DE DE4310518A patent/DE4310518C1/de not_active Expired - Fee Related
-
1994
- 1994-03-26 US US08/530,218 patent/US5620315A/en not_active Expired - Fee Related
- 1994-03-26 EP EP94913058A patent/EP0692073A1/fr not_active Withdrawn
- 1994-03-26 JP JP6521653A patent/JPH09502234A/ja active Pending
- 1994-03-26 WO PCT/EP1994/000961 patent/WO1994023209A1/fr not_active Application Discontinuation
- 1994-03-26 KR KR1019950704258A patent/KR960702064A/ko not_active Application Discontinuation
Non-Patent Citations (1)
Title |
---|
See references of WO9423209A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE4310518C1 (de) | 1994-07-28 |
KR960702064A (ko) | 1996-03-28 |
WO1994023209A1 (fr) | 1994-10-13 |
US5620315A (en) | 1997-04-15 |
JPH09502234A (ja) | 1997-03-04 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
17P | Request for examination filed |
Effective date: 19950712 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): DK FR GB IT SE |
|
17Q | First examination report despatched |
Effective date: 19960523 |
|
GRAG | Despatch of communication of intention to grant |
Free format text: ORIGINAL CODE: EPIDOS AGRA |
|
GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
18D | Application deemed to be withdrawn |
Effective date: 19970718 |