EP1021655A1 - Förderpumpe - Google Patents
FörderpumpeInfo
- Publication number
- EP1021655A1 EP1021655A1 EP98965618A EP98965618A EP1021655A1 EP 1021655 A1 EP1021655 A1 EP 1021655A1 EP 98965618 A EP98965618 A EP 98965618A EP 98965618 A EP98965618 A EP 98965618A EP 1021655 A1 EP1021655 A1 EP 1021655A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- channel
- degassing
- chambers
- feed pump
- impeller
- 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
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D9/00—Priming; Preventing vapour lock
- F04D9/001—Preventing vapour lock
- F04D9/002—Preventing vapour lock by means in the very pump
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/18—Rotors
- F04D29/188—Rotors specially for regenerative pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D5/00—Pumps with circumferential or transverse flow
- F04D5/002—Regenerative pumps
Definitions
- the invention relates to a feed pump with a driven impeller rotating in a pump housing, in which a ring of vane chambers delimiting vane chambers is arranged in at least one of its end faces, with a partially annular channel arranged in the region of the guide vanes in the pump housing, which channel is used to convey the vane chambers of a liquid from an inlet channel to an outlet channel forms a delivery chamber and has a degassing channel arranged in a radially inner region of the pump housing, as seen from the partially annular channel, with a degassing bore leading out of the delivery pump.
- Such delivery pumps are known as peripheral or side channel pumps and are used, for example, to deliver fuel or washing liquid to a window cleaning system of a motor vehicle.
- the guide vanes in the delivery chamber generate a circulation flow which runs transversely to the direction of movement of the guide vanes.
- the degassing channel serves to discharge gas bubbles present in the liquid to be conveyed through the degassing bore from the feed pump. If the feed pump is used to deliver fuel, this is important, for example, when the motor vehicle is warm started, since the temperature of the fuel is particularly high here and gas bubbles are therefore often produced by the fuel evaporating.
- the feed pump is filled for the first time, air bubbles present in the feed chamber can be removed through the degassing hole. Such air bubbles often lead to foaming Liquid in the delivery chamber and thus also to a reduced delivery rate of the delivery pump.
- the degassing channel is located directly in front of the outlet channel, as seen in the direction of rotation of the impeller, and is connected to the delivery chamber via a small gap in relation to the diameter of the partially annular channel. The gas bubbles enter the degassing channel through the gap.
- the invention is based on the problem of designing a feed pump of the type mentioned at the outset in such a way that gas bubbles present in the liquid to be conveyed are removed as completely as possible.
- the inlet channel opening into one of the delivery chambers and the outlet channel opening into the other delivery chamber and the degassing channel in one the housing part of the feed pump having the inlet channel is arranged, only part of the vane chambers having a connection to the degassing channel, a pipeline for the gas bubbles from the area of the outlet side of the feed pump that is difficult to install is avoided.
- the gas bubbles are initially produced due to a rotation of the impeller compared to that to be conveyed
- Low density liquid is pressed into a radially inner region of the delivery chamber.
- the gas bubbles are then removed from the delivery chamber at a particularly early point in time.
- the gas bubbles are almost completely separated from the liquid before they are carried away by the circulation flow. Therefore, the cavitation in the part-ring-shaped channel is kept particularly low.
- the delivery chamber could be connected to the degassing channel via a gap, as in the known delivery pump.
- a gap causes turbulence in the circulation flow of the liquid. This turbulence leads to a reduction in the efficiency of the feed pump.
- swirls in the circulation flow lead to areas with high pressure and areas with low pressure. In areas with low pressure, the liquid can evaporate at high temperatures and thus generate gas bubbles. These eddies are kept particularly low according to the solution to the problem.
- efficiency losses caused by the connection of the blade chambers to the degassing channel are kept particularly low if the proportion of the blade chambers connected to the degassing channel is 10% to 50% of the total number of blade chambers.
- the impeller can be produced particularly inexpensively if the connections of the blade chambers to the degassing channel are formed by a radial widening of the blade chambers pointing in the direction of the axis of rotation of the impeller.
- the feed pump according to the invention has a particularly high delivery capacity if the cross section of the degassing duct is 2% to 12.5% of the cross section of the feed chamber.
- the gas bubbles are separated from the liquid to be conveyed particularly reliably if the degassing channel extends over an angular range from 30 ° to 180 °.
- a further improvement in the efficiency of the feed pump according to the invention is achieved if the degassing duct extends over an angular range from 45 ° to 110 °. With this design, a particularly small amount of the liquid to be pumped passes through the degassing opening and thus out of the feed pump.
- the gas bubbles are produced from the The degassing channel is reliably removed when the degassing bore has approximately the same diameter as the degassing channel.
- a pressure in the degassing channel that counteracts the pressure in the delivery chamber can be adjusted by appropriately designing the cross section of the degassing channel.
- FIG. 1 shows a schematic illustration of a feed pump according to the invention in a longitudinal section
- FIG. 2 shows an inlet-side housing part of a pump housing from FIG. 1,
- FIG. 3 shows an impeller of the feed pump according to the invention from FIG. 1 as seen from the inlet-side housing part
- FIG. 4 shows a partial section through the impeller from FIG. 3 along the line IV-IV
- Figure 5 is a partial section through a further embodiment of the impeller.
- FIG. 1 shows a feed pump 2 according to the invention, driven by an electric motor 1 and designed as a side channel pump, with an inlet-side housing part 3 and an outlet-side housing part 4.
- the housing parts 3, 4 are prestressed against an annular spacer 5. Between the housing parts 3, 4 is a on a shaft 6 of the Electric motor 1 attached impeller 7 rotatably arranged. When the impeller 7 rotates, a liquid to be conveyed is conveyed from an inlet duct 8 arranged in the inlet-side housing part 3 to an outlet duct 9 incorporated in the outlet-side housing part 4.
- a ring of vane chambers 10, 10a, 11, 11a delimiting guide vanes 12, 13 is incorporated in each of the two end faces of the impeller 7.
- Blade chambers 10, 10a, 11, 11a which are located opposite one another, are connected to one another.
- the housing parts 3, 4 of the feed pump 2 each have a partially annular channel 14, 15 in the area of the vane chambers 10, 10a, 11, 11a.
- the partially annular channels 14, 15 together with the blade chambers 10, 10a, 11, 11a form delivery chambers 16, 17.
- circulation flows of a liquid to be delivered occur in the delivery chambers 16, 17.
- the circulation flows are marked with arrows for clarification.
- FIG. 2 shows the inlet-side housing part 3 from FIG. 1 seen from the impeller 7.
- the beginning of the degassing duct 19 is located approximately 15 ° behind the inlet duct 8, viewed in the direction of rotation of the impeller 7, and extends over an angular range of 45 °. Gas bubbles present in the liquid to be conveyed are reliably removed through this degassing channel 19. Escape of the liquid to be pumped and thus a reduction in the efficiency of the feed pump 2 is kept particularly low.
- FIG. 3 shows the impeller 7 from FIG. 1 as seen from the inlet-side housing part 3.
- the individual blade chambers 10, 10a can be seen here, which are separated from one another by the guide blades 12.
- the majority of the vane chambers 10a have the same dimensions as the partially annular channel 14.
- the other vane chambers 10 have the pockets 20 which extend into the area of the degassing channel 19 shown in FIGS. 1 and 2.
- FIG. 4 shows a second embodiment of blade chambers 21, 22 connected to the degassing duct 19 shown in FIG. 1.
- the blade chambers 21, 22 are enlarged in the direction of the axis of rotation of the impeller 7.
- the outline of vane chambers 23, 24 not connected to the degassing duct is shown in dash-dotted lines.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19744037A DE19744037C1 (de) | 1997-10-06 | 1997-10-06 | Förderpumpe |
DE19744037 | 1997-10-06 | ||
PCT/EP1998/006291 WO1999018356A1 (de) | 1997-10-06 | 1998-10-02 | Förderpumpe |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1021655A1 true EP1021655A1 (de) | 2000-07-26 |
EP1021655B1 EP1021655B1 (de) | 2002-03-27 |
Family
ID=7844696
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98965618A Expired - Lifetime EP1021655B1 (de) | 1997-10-06 | 1998-10-02 | Förderpumpe |
Country Status (6)
Country | Link |
---|---|
US (1) | US6309173B1 (de) |
EP (1) | EP1021655B1 (de) |
BR (1) | BR9813023A (de) |
DE (2) | DE19744037C1 (de) |
ES (1) | ES2175847T3 (de) |
WO (1) | WO1999018356A1 (de) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6547515B2 (en) * | 2001-01-09 | 2003-04-15 | Walbro Corporation | Fuel pump with vapor vent |
US7037066B2 (en) | 2002-06-18 | 2006-05-02 | Ti Group Automotive Systems, L.L.C. | Turbine fuel pump impeller |
US6932562B2 (en) * | 2002-06-18 | 2005-08-23 | Ti Group Automotive Systems, L.L.C. | Single stage, dual channel turbine fuel pump |
JP4271501B2 (ja) | 2003-06-06 | 2009-06-03 | 愛三工業株式会社 | 燃料ポンプ |
KR100568547B1 (ko) * | 2003-07-28 | 2006-04-07 | 현담산업 주식회사 | 개선된 형상의 임펠러를 구비하는 자동차용 터빈형전동기식연료펌프 |
DE102007038144A1 (de) * | 2007-08-13 | 2009-02-19 | Continental Automotive Gmbh | Seitenkanalpumpe zur Förderung von Kraftstoff in einem Kraftfahrzeug |
US9249806B2 (en) | 2011-02-04 | 2016-02-02 | Ti Group Automotive Systems, L.L.C. | Impeller and fluid pump |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4854830A (en) * | 1987-05-01 | 1989-08-08 | Aisan Kogyo Kabushiki Kaisha | Motor-driven fuel pump |
DE3925396A1 (de) * | 1989-08-01 | 1991-02-07 | Swf Auto Electric Gmbh | Kraftstoffoerderpumpe |
JPH073239B2 (ja) * | 1989-12-26 | 1995-01-18 | 三菱電機株式会社 | 円周流式液体ポンプ |
KR960001631B1 (ko) * | 1991-05-14 | 1996-02-03 | 미쓰비시덴키가부시키가이샤 | 원주류식(圓周流式) 액체펌프 |
DE4322370C2 (de) * | 1992-07-08 | 1998-10-29 | Mannesmann Vdo Ag | Flüssigkeitspumpe |
US5284417A (en) * | 1993-06-07 | 1994-02-08 | Ford Motor Company | Automotive fuel pump with regenerative turbine and long curved vapor channel |
DE4428254A1 (de) * | 1994-08-10 | 1996-02-15 | Bosch Gmbh Robert | Aggregat zum Fördern von Kraftstoff aus einem Vorratstank zur Brennkraftmaschine eines Kraftfahrzeuges |
US5586858A (en) * | 1995-04-07 | 1996-12-24 | Walbro Corporation | Regenerative fuel pump |
DE19643728A1 (de) * | 1996-10-23 | 1998-04-30 | Mannesmann Vdo Ag | Förderpumpe |
DE19725249C2 (de) * | 1997-06-14 | 2002-05-02 | Siemens Ag | Förderpumpe |
-
1997
- 1997-10-06 DE DE19744037A patent/DE19744037C1/de not_active Expired - Fee Related
-
1998
- 1998-10-02 WO PCT/EP1998/006291 patent/WO1999018356A1/de active IP Right Grant
- 1998-10-02 ES ES98965618T patent/ES2175847T3/es not_active Expired - Lifetime
- 1998-10-02 BR BR9813023-4A patent/BR9813023A/pt active Search and Examination
- 1998-10-02 EP EP98965618A patent/EP1021655B1/de not_active Expired - Lifetime
- 1998-10-02 DE DE59803554T patent/DE59803554D1/de not_active Expired - Fee Related
- 1998-10-02 US US09/486,935 patent/US6309173B1/en not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
---|
See references of WO9918356A1 * |
Also Published As
Publication number | Publication date |
---|---|
BR9813023A (pt) | 2000-08-15 |
ES2175847T3 (es) | 2002-11-16 |
US6309173B1 (en) | 2001-10-30 |
DE19744037C1 (de) | 1999-06-02 |
WO1999018356A1 (de) | 1999-04-15 |
EP1021655B1 (de) | 2002-03-27 |
DE59803554D1 (de) | 2002-05-02 |
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