EP3645890A1 - Schraubenspindelpumpe, kraftstoffförderaggregat und kraftstofffördereinheit - Google Patents
Schraubenspindelpumpe, kraftstoffförderaggregat und kraftstofffördereinheitInfo
- Publication number
- EP3645890A1 EP3645890A1 EP18737174.5A EP18737174A EP3645890A1 EP 3645890 A1 EP3645890 A1 EP 3645890A1 EP 18737174 A EP18737174 A EP 18737174A EP 3645890 A1 EP3645890 A1 EP 3645890A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pump
- stop
- angle
- pump according
- screw
- 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.)
- Granted
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
- 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
- F04C2/16—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 helical teeth, e.g. chevron-shaped, screw 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
- 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
-
- 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
- F04C2210/00—Fluid
- F04C2210/10—Fluid working
- F04C2210/1044—Fuel
-
- 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
- F04C2230/00—Manufacture
- F04C2230/60—Assembly methods
-
- 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
- F04C2240/00—Components
- F04C2240/30—Casings or housings
Definitions
- the present invention relates to a screw pump, a screw pump, such a comprehensive force ⁇ material conveying unit, as well as such a fuel delivery unit comprising ⁇ fuel feed unit for use in vehicles, particularly in passenger cars and / or
- Screw pumps - also called screw pumps - are positive displacement pumps whose displacers are in the form of a spindle screw.
- Two counter-rotating screw spindles which are formed with a thread-shaped profiling, engage each other and displace a fluid, which may be about a fuel - eg gasoline or diesel fuel - for an internal combustion engine of a passenger car and / or a commercial vehicle.
- the combination of the spindle screw and a pump housing in which the Schrau ⁇ benspindeln are arranged and guided, is also referred to as a pump stage.
- the two screw spindles, in conjunction with the pump housing form delivery chambers for the pumped fluid. As a result of a rotation of the screw spindles, these delivery chambers migrate from a suction side or inlet side to a pressure side or outlet side of the pump or pump stage and thus convey the sucked-in delivery medium.
- pump or pump stage is to be understood as one and the same object.
- Such pumps are used for example in power ⁇ fuel delivery units or fuel pump of vehicles, in particular passenger cars and / or trucks.
- fuel delivery unit or fuel pump is one and the same To understand subject, which also includes an electric motor as a drive in addition to a pump or pump stage.
- the '' driving '' screw can be supported via a coupling against the pump housing, whereas the '' driven '' or '' driven '' screw can be supported on the pressure side via a spigot molded onto the pump housing.
- the '' driving '' screw can be supported via a coupling against the pump housing, whereas the '' driven '' or '' driven '' screw can be supported on the pressure side via a spigot molded onto the pump housing.
- the actual support of the two screw spindles is due to the operation of the suction side on a housing side before ⁇ seen axial stop.
- the suction side provided planar stop surface ensures only that the operational axial displacement of the screws is intercepted. The inclination or Entanglement of the screws, however, remains unaffected.
- An object of an embodiment of the present invention is to provide an improved pump of the type described above, which also accommodates the skewing of the screws. This object is achieved by claim 1, which provides a screw pump under protection.
- Advantageous for ⁇ leadership embodiments of the invention are the subject of the dependent claims. Disclosed is a screw pump stage to ⁇ collectively at least two screw spindles, which comprise a drive spindle and a spindle moving in opposite direction to the drive spindle, and a pump housing for receiving the two screw spindles.
- the two screw spindles form delivery chambers, at least in connection with the pump housing, which move as a result of rotation of the screw spindles from a suction side or inlet side to a pressure side or outlet side of the pump.
- the delivery chambers move in the direction of the pressure side of the pump as a result of rotation of the screw spindles.
- said additional element can be arranged in ⁇ within the pump housing and / or the pump cover.
- the pump housing has a first stop for the drive spindle and a second stop for the spindle. It is proposed that at least one of the two stops with respect to a first plane of the pump is set at an angle to counteract an operational skew or entanglement of the two spindles.
- An angular adjustment of a stop means, in the sense of this disclosure, an inclination or pivoting of the stop.
- the first stop is set at a first angle and the second stop at a second angle with respect to the first plane to counteract the skew.
- the first angle may be opposite to the second angle.
- the two angles can be identical in magnitude. This further reduces the said 'internal' leakage and further improves pump efficiency.
- At least one of the two stops is angled relative to a second plane of the pump that is orthogonal to the first plane of the pump to counteract the skewing of the two spindles in the space.
- the first stop is set at a third angle and the second stop is set at a fourth angle with respect to the second plane to counteract the skew.
- the third angle may be opposite to the fourth angle.
- the two angles can be identical in magnitude.
- the pump housing has at least one insert element or element acting as a stop element for the screw spindles, which has the first stop and the second stop and against which the screw spindles are supported.
- the pump housing has a first insert element or element for the drive spindle and a second insert element or element for the spindle, wherein the first insert element or the first stop and the second insert means or Element has the second stop for supporting the respective screw.
- the insert means may be formed, for example, cuboid, prismatic or rondenförmig. Regarding the shape of the insert but also a variety of other variations are conceivable. Under a ronde-shaped insert means is a substantially cylindrical body or
- the insert means may advantageously be provided with a peripheral shoulder for axial fixing relative to the pump housing. Additionally or alternatively, the insert means may further be provided with tangential form elements Be provided with respect to the pump housing. These form elements are arranged over the circumference of the insert means, such as in the shape of straight tooth flanks.
- Shaped form elements very diverse and can include both even and odd shapes.
- the insert means may also be formed of a ceramic, a metal or a plastic.
- a ceramic or a metal is characterized by its hardness, which is known to reduce friction and promote wear resistance.
- the pump housing can be supplemented with a pump cover, in which the first stop and the second stop are arranged.
- a pump cover in which the first stop and the second stop are arranged.
- the use of means or element arranged in the pump cover at ⁇ can be.
- the pump cover may in this case be regarded as a belonging to the Pum ⁇ pen housing part for receiving the screw spindles.
- the pump housing and / or the pump cover can / can be designed as an injection molded part / injection molded parts.
- the insert means or element may have a receptacle for an alignment means, preferably in the form of a pressure pin, with which the insert means or element is for Umspritzung aligned to an angular position with respect to the longitudinal direction and / or the transverse direction of the pump adjust.
- a fuel delivery unit which has an electric motor and a driven by the electric motor screw pump of the type described above. Such a fuel delivery unit is protected by the claim 18.
- a fuel delivery unit for use in a fuel tank of a vehicle. Under a vehicle is to understand any type of vehicle, which must be supplied for operation with a liquid and / or gaseous fuel, but in particular passenger cars and / or commercial vehicles.
- the fuel delivery unit comprises a fuel delivery unit of the type described above and a swirl pot in which the fuel delivery unit is arranged to deliver fuel from the swirl pot to an internal combustion engine.
- FIG. 1 is a sectional view of a proposed FIG. 1
- a ronde-shaped insert means or stop element together with a pressure pin and Figure 3 is a sectional view and two perspective
- Fig.l illustrates a screw pump
- Screw spindle pump stage P which comprises a drive spindle 2 and a running spindle 4 counter to the drive spindle 2.
- the pump P further comprises a pump housing 6, which also has a pump cover 8 for receiving the two screw spindles 2, 4.
- the two screw spindles 2, 4 form with the pump housing 6 delivery chambers 10, which due to a rotation of the screw spindles 2, 4 from a suction side 12 to a 0
- rondenförmige and made of a ceramic insert means 16, 18 are arranged, which form abutment surfaces, against which the two screw spindles 2, 4 operationally abut and thereby supported.
- the stop surfaces may be flat, but also uneven, for example in the form of a concave with respect to the screw spindles shaping of each facing stop surface.
- the first inserting means or the first stop 16 is assigned to the drive spindle 2
- the second inserting means or the second stopper 18 is assigned to the running spindle 4.
- these two stops 16, 18 with respect to a first level X - Z and with respect to a second level X - Y of the pump P are each set at an angle to counteract operational entanglement of the two spindles 2, 4.
- the first plane X - Z is orthogonal to the second plane X - Y.
- the first plane X - Z is thereby by the longitudinal direction or longitudinal axis X - X of the pump or pump stage and an orthogonal thereto transverse direction or transverse axis Z - Z The pump or pump stage clamped.
- the second plane X - Y is determined by the longitudinal direction or longitudinal axis X - Y spanned the pump or pump stage - X of the pump or pump stage and another lying orthogonal to cross ⁇ direction or transverse axis Y.
- the first stop 16 is with respect to the first plane X - Z by a first angle ⁇ and the second stop 18 is made with respect to the first plane X - Z by a second angle 2.
- the first angle ⁇ is opposite to the second angle 0 (2, wherein the two angles ⁇ , 2 in terms of amount, for example, are identical (see Fig.l).
- first stop 16 is set at a third angle ⁇ i with respect to the second plane X-Y and the second stop 18 at a fourth angle ⁇ 2 with respect to the second plane X-Y.
- the third angle SSI is set opposite to the fourth lying angle ß 2, wherein the two angular SSI, ß 2 quantitatively identical to example (see. Figure 3).
- the pump housing 6 and the pump cover 8 are formed as injection molded ⁇ parts.
- the two insertion means 16, 18 with the associated stops are encapsulated in the injection molding production of the pump cover 8. However, before they are overmolded, they experience the spatial orientation described above (see angle ⁇ , 2 , ßi, ß 2 ) ⁇
- the two insertion means 16, 18 each contain a receptacle 20 for an alignment means, preferably in the shape of a An ⁇ pressure pin 22 (see Fig.
- the two pressure pins 20 are removed from the pump cover 8, so that the two receptacles or recesses 20 are formed.
- the receptacle 20 may be hemispherical in shape, with a short outwardly conically expanding section adjoining the hemispherical shape (see FIG.
- one of the abovementioned round-shaped insertion means 16, 18 is to be understood as meaning a substantially cylindrical body or cylinder whose height is smaller in relation to its width or to its diameter.
- the ronde-shaped insertion means 16, 18 also advantageously has the shape of a section stepped cylinder, the first opposite the second portion 26, for example, wider portion 24 is provided with the receptacle 20.
- the receptacle 20 may partially extend into the second section 26, which is offset from the first section (see FIG. 3).
- the geometry of the receptacle 20 is freely selectable to act as a receptacle 20 for the Anyakstatt 22.
- the peripheral shoulder 23 acts in the sense of an anchoring element which axially fixes the insert means 16, 18 with respect to the overmolded pump cover 8.
- elements are provided, which act tangentially, such as in the shape of straight tooth flanks 25.
- curved mold elements can be provided which equally the determination ensure the insert 16, 18 in the tangential direction.
- two plane-parallel surfaces may be formed on the circumference of the portion 24.
- 3 shows a further sectional illustration of the previously described pump cover 8 along the section line A-A, wherein the two ceramic insert means 16, 18 with the associated stops can be taken from the sectional view, which are also spaced relative to the second plane X-Y said angle ßi, ß2 are aligned or employed.
- 3 illustrates the possibility the advantages of the pump cover 8 as an injection molded part formed from ⁇ having material savings at various points ma- which advantageously contribute to the Ge ⁇ weight saving.
- the lower of the two perspective views in Figure 3 illustrates the inlet 28 of the pump cover 8, via which a fuel is sucked into the pump P.
- Transverse or orthogonal to the longitudinal direction X - X extends a web 30, which is integrally formed on the pump cover 8 and its substantially circular inlet opening divides.
- the diameter of the inlet opening need not necessarily be understood in connection with a circular inlet opening, but rather as a contour circumscribing an inlet.
- the two insertion means 16, 18 are housed.
- the web 30 is executed so finely or overmoulded that the web contour due to the overmoulded insert means 16, 18 wel ⁇ lenförmig fails.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Details And Applications Of Rotary Liquid Pumps (AREA)
- Rotary Pumps (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102017210767.7A DE102017210767B4 (de) | 2017-06-27 | 2017-06-27 | Schraubenspindelpumpe, Kraftstoffförderaggregat und Kraftstofffördereinheit |
| PCT/EP2018/066948 WO2019002203A1 (de) | 2017-06-27 | 2018-06-25 | Schraubenspindelpumpe, kraftstoffförderaggregat und kraftstofffördereinheit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP3645890A1 true EP3645890A1 (de) | 2020-05-06 |
| EP3645890B1 EP3645890B1 (de) | 2024-03-27 |
Family
ID=62816504
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP18737174.5A Active EP3645890B1 (de) | 2017-06-27 | 2018-06-25 | Schraubenspindelpumpe, kraftstoffförderaggregat und kraftstofffördereinheit |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US11306715B2 (de) |
| EP (1) | EP3645890B1 (de) |
| CN (1) | CN110945244B (de) |
| DE (1) | DE102017210767B4 (de) |
| WO (1) | WO2019002203A1 (de) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11486392B2 (en) | 2020-12-15 | 2022-11-01 | Leistritz Pumpen Gmbh | Screw spindle pump having a stop surface axially adjacent to an end surface of a running spindle |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102019210873A1 (de) * | 2019-07-23 | 2021-01-28 | Audi Ag | Schraubenspindelpumpe zur Förderung eines Fluids sowie entsprechende Schraubenspindelpumpenanordnung |
| DE102020113372A1 (de) | 2020-05-18 | 2021-11-18 | Leistritz Pumpen Gmbh | Schraubenspindelpumpe |
| DE102021208481B4 (de) | 2021-08-04 | 2026-04-16 | Schaeffler Technologies AG & Co. KG | Förderpumpe und Kraftfahrzeug mit einer derartigen Förderpumpe |
| DE102021133109A1 (de) * | 2021-12-14 | 2023-06-15 | Leistritz Pumpen Gmbh | Schraubenspindelpumpe |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB358843A (en) * | 1931-02-06 | 1931-10-15 | Sidney Zaleski Hall | Improvements in and relating to rotary pumps |
| DE672700C (de) * | 1936-07-30 | 1939-03-08 | Imo Industri Ab | Schraubenpumpen, -motore, -messer u. dgl. |
| DE3800336A1 (de) * | 1988-01-08 | 1989-07-27 | Leistritz Ag | Dichtungsfreie pumpe |
| US4940394A (en) * | 1988-10-18 | 1990-07-10 | Baker Hughes, Inc. | Adjustable wearplates rotary pump |
| US5123821A (en) | 1990-03-08 | 1992-06-23 | Allweiler Ag | Screw spindle pump with a reduced pulsation effect |
| US20030037823A1 (en) * | 2001-08-22 | 2003-02-27 | Pickelman Dale M. | Regulator valve for fuel pump |
| BE1016733A3 (nl) * | 2005-08-25 | 2007-05-08 | Atlas Copco Airpower Nv | Verbeterde lagedruk schroefcompressor. |
| CN101473139B (zh) * | 2006-06-30 | 2013-08-28 | 格伦德福斯管理联合股份公司 | 螺杆泵 |
| DE102006049663A1 (de) * | 2006-10-18 | 2008-05-08 | Willy Vogel Ag | Schraubenspindelpumpe mit Scheibenpumpen-Axiallager |
| DE102012223592A1 (de) * | 2012-12-18 | 2014-07-03 | Robert Bosch Gmbh | Geometrie zum Ausgleich axial auftretender Spalte in Elektropumpen |
| DE102014102390B3 (de) * | 2014-02-25 | 2015-03-26 | Leistritz Pumpen Gmbh | Schraubenspindelpumpe |
| US20160072362A1 (en) * | 2014-09-05 | 2016-03-10 | Steve Michael Kube | Hybrid Axial Flux Machines and Mechanisms |
-
2017
- 2017-06-27 DE DE102017210767.7A patent/DE102017210767B4/de active Active
-
2018
- 2018-06-25 US US16/624,745 patent/US11306715B2/en active Active
- 2018-06-25 WO PCT/EP2018/066948 patent/WO2019002203A1/de not_active Ceased
- 2018-06-25 CN CN201880037849.2A patent/CN110945244B/zh active Active
- 2018-06-25 EP EP18737174.5A patent/EP3645890B1/de active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11486392B2 (en) | 2020-12-15 | 2022-11-01 | Leistritz Pumpen Gmbh | Screw spindle pump having a stop surface axially adjacent to an end surface of a running spindle |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2019002203A1 (de) | 2019-01-03 |
| DE102017210767B4 (de) | 2019-10-17 |
| CN110945244A (zh) | 2020-03-31 |
| CN110945244B (zh) | 2021-11-19 |
| DE102017210767A1 (de) | 2018-12-27 |
| EP3645890B1 (de) | 2024-03-27 |
| US20210164468A1 (en) | 2021-06-03 |
| US11306715B2 (en) | 2022-04-19 |
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