WO2004044429A2 - Pump - Google Patents
Pump Download PDFInfo
- Publication number
- WO2004044429A2 WO2004044429A2 PCT/DE2003/003746 DE0303746W WO2004044429A2 WO 2004044429 A2 WO2004044429 A2 WO 2004044429A2 DE 0303746 W DE0303746 W DE 0303746W WO 2004044429 A2 WO2004044429 A2 WO 2004044429A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- pump according
- pump
- pinion
- ring gear
- eccentric
- Prior art date
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
- F04C2/10—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member
- F04C2/103—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member one member having simultaneously a rotational movement about its own axis and an orbital movement
Definitions
- the invention relates to an internal gear pump, in particular a fuel delivery pump, a pinion of the internal gear pump being driven by an eccentric drive.
- Such pumps are known.
- they are also used as diesel feed pumps in motor vehicle construction.
- the eccentric drives have elaborate designs.
- an internal gear pump in particular a fuel feed pump, the pump being an orbital pump with an eccentric drive and a pinion being driven by an eccentric drive, the drive shaft having an eccentrically arranged drive element.
- the drive element preferably engages in a circular disk-shaped eccentric disk with an eccentric recess.
- the drive element is represented by a double and the recess in the eccentric disc by a slot.
- the eccentric disc engages in a circular recess in the pinion, the pinion being made of plastic.
- the use of plastic leads to low manufacturing costs and at the same time leads to good sliding properties for the eccentric disc.
- a pump according to the invention was characterized in that the pinion engages with its external toothing in a ring gear toothing firmly clamped in the housing, wherein the ring gear toothing can also be made of plastic.
- a pump is preferred in which the ring gear teeth are molded into a housing wall is. This saves components. For some applications, serrated teeth can also be advantageous.
- a pump is preferred in which the pinion and the ring gear toothing have a special toothing in the form of a cycloidal short toothing. This special toothing ensures that individual chambers are formed which convey the medium and can therefore build up pressure.
- a pump is also preferred in which the pinion and the ring gear teeth seal via the driving flanks. This has the advantage that a very good sealing effect is still achieved when the gears wear out, because the driving flanks remain in contact and thus seal.
- a pump according to the invention is characterized in that an inner cover is pressurized from the outside and thus seals against the rotating group. This has the advantage that an axial compensation of the sealing gaps is brought about by the pressurization of the inner cover. Furthermore, a pump is preferred in which an outlet valve designed as a sector-symmetrical, in particular star-shaped tongue valve can be used. The pressure medium is thus conveyed into the pressure chamber via this star-shaped outlet valve, which is attached to this inner cover. Furthermore, a pump is preferred which has an outer cover which forms the stroke limitation for the valve tongues.
- Another pump according to the invention is characterized in that a ring gear opening in a component is cup-shaped and thus a side wall is created for the rotating pinion. Also preferred is a pump in which the eccentric disc is centered in the ring gear component. In this way, exact centering is simply produced by the tolerances of these two components.
- a pump is also preferred in which the other side wall is represented by a disk. This disc is positioned between the ring gear and the control housing and thus closes off the rotating group on the opposite side of the ring gear side wall. This leads to a very simple construction of the rotation group.
- a pump in which the disk is provided with openings is also preferred, through which the medium is conveyed into the pressure chamber. Furthermore, a pump is preferred in which the openings are closed by a sector-symmetrical, in particular star-shaped check valve.
- a pump according to the invention is characterized in that the tongue valve component is provided with a folded collar which seals directly radially between the disk and a housing. This means that separate seals and grooves for receiving the same can be saved. Furthermore, a pump is preferred in which the tongue valve component is made of a sheet metal part, on which a rubber coating or an elastomer layer is applied.
- Figure 1 shows a gear pump according to the invention with its gear set.
- FIG. 2 shows an illustration of the gear pump according to the invention and various
- Figure 3 shows the cross section C-C through the pump of Figure 2.
- Figure 4 shows the cross section B-B through the pump of Figure 2.
- Figure 5 shows another construction of a gear pump according to the invention
- an internal gear pump 1 according to the invention is shown with a removed housing cover, so that the gear set and the eccentric drive can be seen.
- the pump has a housing 3.
- a ring gear component 5 is arranged inside the housing 3, which is fixedly connected to the housing and has an internal toothing 7.
- a pinion 9 which has at least one tooth less in the toothing than the ring gear toothing.
- the pinion moves "planet-like" within the fixed ring gear at a much lower speed than the eccentric drive.
- the ring gear component 5 and the pinion 9 are made of plastic in order to ensure low manufacturing costs. To compensate for possible disadvantages of plastic gears, namely somewhat higher wear and a somewhat higher coefficient of thermal expansion than with aluminum or steel, the following design principles are chosen.
- the ring gear component 5 is firmly clamped axially and radially, that is to say integrated into the housing, and the pinion 9 is set in rotation via an eccentric drive 13.
- the gears are sealed via the driving flanks, so that when the gears wear, a very good sealing effect is achieved because the driving flanks remain in contact and seal with them.
- the required, compact design can be realized because both the drive shaft 23, which will be shown later in FIGS. 3, 4 and 5, has an eccentrically arranged double flat 25, and the eccentric disc 13 has an eccentrically arranged slot 15, which makes it constructively very simple drive is achieved.
- the pinion 9 and the ring gear component 5 are made of plastic and preferably have the same coefficient of thermal expansion, small games can be guaranteed depending on the temperature. Because the ring gear component 5 is stationary and is clamped axially and therefore no sealing gaps are formed between the housing 3 and the ring gear component 5, a very good volumetric efficiency is achieved.
- FIG. 2 shows the gear pump according to the invention with several cutting lines for the cuts A-A, B-B and C-C.
- a star-shaped reed valve 17 can be seen in FIG.
- the corresponding components of the pump which are indicated here by many background lines, can be seen more clearly in the sectional figures in the following figures.
- FIG. 3 shows the section CC of the pump from FIG. 2.
- the same components as in the previous description of the figures are provided with the same reference symbols.
- the ring gear component 5 is fixedly arranged in the pump housing 3 and is sealed by an inner cover 19, while the ring gear component is sealed by the housing 3 on the other side.
- the inner cover 19 and the ring gear member 5 are secured by fasteners 21, such as. B. screws, firmly clamped to the housing.
- the pinion 9 is mounted, which in turn contains the eccentric disc 13, which can be rotatably supported in the pinion 9 by a drive shaft 23.
- the drive shaft 23 has an eccentrically arranged double flat 25 which engages in the eccentrically arranged slot 15 of the eccentric disc 13.
- the eccentric disc 13 thus rotates at the drive shaft speed and thereby presses the pinion 9 through the eccentric movement into the next open toothing gaps of the ring gear component 5.
- a so-called sliding bearing 27 is therefore provided between the eccentric disc 13 and the pinion 9, so that the pinion 9 with a decidedly lower Speed as the eccentric 13 and the drive shaft 23 rotates.
- a star-shaped tongue valve 29 (or 17) made of a rubber-coated sheet is arranged, which closes the rotation group until a pressure builds up and the medium conveyed under pressure, the tongue valves 29 , 17 opens and allows the medium to flow into the pressure chamber 31.
- the medium now flowing under pressure in the pressure chamber 31 presses the inner cover 19 against the rotation group consisting of the ring gear component 5 and the pinion 9 and thus provides an additional seal under pressure.
- the pressure chamber 31 is sealed off from the outside by an outer cover 33, the outer cover 33 with the housing 3 representing the outer housing of the pump.
- the housing cover 33 also serves as a stop for the spring tongue valves 29, 17, so that these spring tongue valves 29, 17 only make a limited stroke and therefore cannot be overstretched in their opening movement.
- the gear pump is sucked in via an annular channel 35, which is partially covered and partially opened by the pinion 9 due to the rotation of the pinion 9, so that a corresponding suction and pressure range result according to the position of the rotation group.
- the intake ring channel 35 is connected via corresponding lines 37 z. B. connected to the fuel tank of a motor vehicle.
- FIG. 4 shows a further section BB of the pump from FIG. 2.
- the same components are provided with the same reference numerals and will not be described again here to avoid repetition.
- the fastening means 21 can also be seen in the form of a cut screw.
- the compact design of the pump according to the invention can be realized because both the drive shaft 23 has an eccentrically arranged double flat 25 and the eccentric disc 13 with an eccentrically arranged slot 15 is used.
- FIG. 5 A variant of a pump construction according to the invention is shown in FIG. 5.
- a ring gear component 40 is cup-shaped, so that in addition to the internal toothing 42 of the ring gear, the bottom 44 of the cup-shaped depression represents a side wall for the rotating pinion 9.
- the other side wall of the rotating group is represented by a disk 46 which is positioned between the ring gear component 40 and the control housing 48.
- the disk 46 has openings, which are not shown in detail here, through which the medium is conveyed in a pressure chamber 50.
- the openings are closed by a check valve component 52, which can also consist of rubber-coated sheet metal and is star-shaped (see valve 17 in FIG. 2).
- the tongue valve 52 can additionally be provided with a sealing bead. This combines two functions (seal and valve) in one component.
- the tongue valve component 52 also has a collar 54, which seals directly radially between the disk 46 and the control housing 48.
- Another special feature of this construction is that the eccentric disk 56, which serves to drive the pinion 9, is centered by a centering pin 58 in the ring gear component 40 or in its side wall 44. For centering, this centering can take place via three small cams in a somewhat larger receiving bore in the side wall 44, which rub off during the running-in.
- chamber 60 remains depressurized above the displacement gear set.
- the power transmission takes place via the drive pin 23 and the double flat 25 as in the previous constructions, the drive pin 23 being mounted in the control housing 48.
- This centering of the eccentric disk 56 in the ring gear component 40 has the advantage that the gear set can be positioned very precisely in relation to the drive shaft 23 during assembly, which is of great advantage in the case of a cycloid toothing.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Rotary Pumps (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10393578T DE10393578D2 (en) | 2002-11-14 | 2003-11-12 | pump |
EP03779690A EP1570179A2 (en) | 2002-11-14 | 2003-11-12 | Pump |
AU2003287862A AU2003287862A1 (en) | 2002-11-14 | 2003-11-12 | Pump |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10252966 | 2002-11-14 | ||
DE10252966.3 | 2002-11-14 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2004044429A2 true WO2004044429A2 (en) | 2004-05-27 |
WO2004044429A3 WO2004044429A3 (en) | 2004-08-12 |
Family
ID=32308539
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE2003/003746 WO2004044429A2 (en) | 2002-11-14 | 2003-11-12 | Pump |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1570179A2 (en) |
AU (1) | AU2003287862A1 (en) |
DE (1) | DE10393578D2 (en) |
WO (1) | WO2004044429A2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102016121237A1 (en) * | 2016-11-07 | 2018-05-09 | Nidec Gpm Gmbh | Hydraulic gerotor pump and method of manufacturing a gerotor pump |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0473025A1 (en) * | 1990-08-20 | 1992-03-04 | BARMAG LUK AUTOMOBILTECHNIK GMBH & CO.KG | Internal-gear pump for hydraulic fluid |
US6227833B1 (en) * | 1997-04-24 | 2001-05-08 | Danfoss A/S | Fluid machine having cooperating displacement elements and a housing partially covering the displacement elements |
-
2003
- 2003-11-12 AU AU2003287862A patent/AU2003287862A1/en not_active Abandoned
- 2003-11-12 WO PCT/DE2003/003746 patent/WO2004044429A2/en not_active Application Discontinuation
- 2003-11-12 DE DE10393578T patent/DE10393578D2/en not_active Expired - Fee Related
- 2003-11-12 EP EP03779690A patent/EP1570179A2/en not_active Withdrawn
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0473025A1 (en) * | 1990-08-20 | 1992-03-04 | BARMAG LUK AUTOMOBILTECHNIK GMBH & CO.KG | Internal-gear pump for hydraulic fluid |
US6227833B1 (en) * | 1997-04-24 | 2001-05-08 | Danfoss A/S | Fluid machine having cooperating displacement elements and a housing partially covering the displacement elements |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102016121237A1 (en) * | 2016-11-07 | 2018-05-09 | Nidec Gpm Gmbh | Hydraulic gerotor pump and method of manufacturing a gerotor pump |
DE102016121237B4 (en) * | 2016-11-07 | 2020-03-12 | Nidec Gpm Gmbh | Hydraulic gerotor pump and manufacturing process of a gerotor pump |
Also Published As
Publication number | Publication date |
---|---|
DE10393578D2 (en) | 2005-07-07 |
AU2003287862A1 (en) | 2004-06-03 |
EP1570179A2 (en) | 2005-09-07 |
WO2004044429A3 (en) | 2004-08-12 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE69534835T2 (en) | Extrusion adjustable spiral machine | |
WO1992000449A1 (en) | Assembly for feeding fuel from the fuel tank of a motor vehicle to its internal combustion engine | |
EP1832723B1 (en) | Valve actuation for adjusting the stroke of valves in an internal combustion engine | |
WO2011045171A2 (en) | Double internal gear pump | |
EP2483562A2 (en) | Axial sealing for an internal gear pump | |
DE3909319C2 (en) | Gear motor | |
EP2201239A1 (en) | Fuel pump, in particular for a fuel system of a reciprocating-piston internal combustion engine | |
WO2013045152A2 (en) | Internal gear pump | |
EP1794420B1 (en) | Camshaft adjuster for an internal combustion engine | |
EP1775467B1 (en) | Switchable eccentric drive and stirring device with switchable radial piston pump | |
DE3440850A1 (en) | AXIAL PISTON PUMP | |
DE3444392C2 (en) | ||
EP1570179A2 (en) | Pump | |
DE102012210938A1 (en) | Internal gear pump | |
DE102006025367B4 (en) | Gear pump, in particular gear oil pump for vehicles | |
DE102013204616B4 (en) | 2 internal gear pump | |
DE3119807A1 (en) | "DISPLACEMENT MACHINE, IN PARTICULAR PLANENT WHEEL MOTOR" | |
WO1993024753A1 (en) | Double pump | |
DE102010064130A1 (en) | Axial disc and gear pump with axial disc | |
DE3918063A1 (en) | DEVICE FOR CHANGING THE TIME FLOW RATE IN A TURN VIBRATION DAMPER | |
EP2176519A1 (en) | Pendulum slide vacuum pump | |
DE102006061706A1 (en) | Sliding/rotary vane pump for e.g. filling blister contained in seat, has suction hole opening and closing unit to open and close suction opening, when return valve opens pump area in peripheral direction | |
EP2002169B1 (en) | Lubricant or hydraulic pump | |
AT505061B1 (en) | ROTARY PUMP | |
DE102013211647A1 (en) | Internal gear pump |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AK | Designated states |
Kind code of ref document: A2 Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BY BZ CA CH CN CO CR CU CZ DE DK DM DZ EC EE ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NO NZ OM PH PL PT RO RU SD SE SG SK SL TJ TM TN TR TT TZ UA UG US UZ VC VN YU ZA ZM ZW |
|
AL | Designated countries for regional patents |
Kind code of ref document: A2 Designated state(s): BW GH GM KE LS MW MZ SD SL SZ TZ UG ZM ZW AM AZ BY KG KZ MD RU TJ TM AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LU MC NL PT RO SE SI SK TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
WWE | Wipo information: entry into national phase |
Ref document number: 2003779690 Country of ref document: EP |
|
REF | Corresponds to |
Ref document number: 10393578 Country of ref document: DE Date of ref document: 20050707 Kind code of ref document: P |
|
WWE | Wipo information: entry into national phase |
Ref document number: 10393578 Country of ref document: DE |
|
WWP | Wipo information: published in national office |
Ref document number: 2003779690 Country of ref document: EP |
|
NENP | Non-entry into the national phase |
Ref country code: JP |
|
WWW | Wipo information: withdrawn in national office |
Ref document number: JP |