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
  • F04D5/00—Pumps with circumferential or transverse flow
  • F04D5/002—Regenerative pumps
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
  • F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
  • F02M37/04—Feeding by means of driven pumps
  • F02M37/08—Feeding by means of driven pumps electrically driven
  • F02M37/10—Feeding by means of driven pumps electrically driven submerged in fuel, e.g. in reservoir
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
  • F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
  • F02M37/22—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system
  • F02M37/32—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system characterised by filters or filter arrangements
  • F02M37/50—Filters arranged in or on fuel tanks
• • 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
  • F04D29/70—Suction grids; Strainers; Dust separation; Cleaning
  • F04D29/708—Suction grids; Strainers; Dust separation; Cleaning specially for liquid pumps

Definitions

• the invention relates to a conveying pump with a ⁇ driven, rotating in a pump housing the impeller, delimiting with at least one ring of vane chambers blades and with at least one arranged in the region of the rotor blades in the pump housing partially annular channel WEL rather with the vane chambers, a conveying a fluid from an inlet channel to an outlet channel ⁇ provided delivery chamber forms, and a filter with a connection piece, wherein the connection piece is connected to the inlet channel of the feed pump.
• feed pumps are known as peripheral or sokanalpum- pen and are often used for conveying fuel from a fuel tank to an internal combustion engine of a motor vehicle.
• the filter is upstream of the pump and serves to prevent contamination from entering the feed pump.
• the fuel to be pumped can have different temperatures.
• hot fuel for example, during a warm start of the motor vehicle, the fuel tends to ver ⁇ reinforced gassing, whereby gas bubbles are formed from vapor fuel, which in turn significantly affect the capacity of the feed pump.
• EP 0934466 Bl is known to provide a calming region between the Einlasska ⁇ nal and a compression region.
• the calming area serves to calm the flow, whereby further outgassing of the fuel is reduced.
• the disadvantage of this design is that the calming area reduces the effective length of the part-annular channel needed for pressure build-up.
• the invention has for its object to provide a feed pump with a filter which has good hot-conveying properties by the outgassing of the fuel to be delivered ⁇ material is effectively reduced.
• the object is achieved in that the check circuit clip of the filter a region in Strö ⁇ flow direction having decreasing cross-section and that the transition of flow cross-section of the connecting piece is formed continuously to the flow cross-section of the inlet channel.
• the region in the filter With the configuration of the flow region in the filter, the region is extended, is selectively supplied by the fuel of the feed pump, in particular the impeller. As a result, not only the inlet channel is now available for the flow guidance of the fuel.
• the extended Strömungsbe ⁇ rich with its concrete design allows a ge ⁇ targeted guiding the flow of fuel. Turbulence is built off ⁇ , resulting in an effective calming of the flow. As a result of targeted guidance, the fuel can outgas less.
• the area in the filter itself verringerndem in flow cross section also causes compression of the fuel, which has a positive effect on the hot conveying self ⁇ shaft of the feed pump.
• Another advantage is that a calming area in the part-annular channel is no longer absolutely necessary, whereby the usable Ka ⁇ nalander increases for the pressure build-up.
• the steady transition of the flow cross sections of the connecting piece of the filter and the inlet port of the feed pump to a Beruhi ⁇ supply of fuel flowing contributes, as a result not of existing edges or jumps turbulence is avoided.
• a feed pump whose impeller has two concentrically arranged rings of vane chambers bounding blades with correspondingly associated part-annular channels in the pump housing, it has proven to be advantageous to each upstream an inlet channel and the connecting piece of the filter before the transition into the inlet channels, each with two form separate Strö ⁇ flow cross sections.
• each of the two intake ports is extended into the region of the filter, so that the fuel is given a sufficient distance for reassurance.
• the flow cross-sections which are separated from one another can be formed particularly easily by a partition wall arranged in the connecting piece.
• Turbulence in the fuel which outgassing begünsti ⁇ gene are in directing the fuel with whils inun- gene in the filter avoided if the radii of the suitss massese ⁇ approximations in the flow path of the filter correspond to at least 20% of the height or width of the flow cross-section in this area.
• turbulences of the fuel due to cross-sectional changes are avoided in that cross-sectional changes in the flow profile are formed continuously.
• a particularly good and tight connection of the filter with the feed pump is achieved in that the connecting piece of the filter is pressed or clipped into a receptacle of the pump housing, wherein the receptacle is arranged in the pump cover of the pump cover and pump bottom formed pump housing.
• FIG. 1 shows a schematic representation of a delivery pump according to the invention in a fuel tank of a
• FIG. 2 shows a section through the filter and the pumping stage of the feed pump according to FIG. 1.
• FIG. 1 shows a fuel tank 1 of a motor vehicle, not shown.
• a feed pump 2 is arranged, which could also be arranged in a swirl pot.
• the feed pump 2 has a housing 3, which connects the connecting piece 4 and the pumping stage 5 miteinan ⁇ .
• a filter 6 is connected via its connecting piece 7 with the feed pump 2.
• the feed pump 2 sucks fuel from the fuel tank 1 through the filter 6. Via an outlet 8, the fuel is conveyed at higher pressure by means of a feed line 9 to the engine 10 of the motor vehicle.
• FIG. 2 shows a section through the lower part of the feed pump 1 with the pumping stage 5 and the filter 6.
• the pump stage 5 consists of a pump housing 11, in which an impeller 12 is arranged.
• the pump housing 11 is formed by a Pum ⁇ penboden 13 and a pump cover fourteenth
• the impeller 12 is driven by a shaft 15, which is part of an electric motor, not shown, of the feed pump 2.
• the impeller 14 has on its side surfaces in each case two concentrically arranged rings 16-19 of blade chambers bounding blades 20-23, wherein the Schaufelkam ⁇ mers opposing wreaths 16, 18; 17, 19 are formed so that the impeller 12 is axially flowed through.
• the wreaths 16-19 opposite 11 ⁇ annular channels 24-27 are arranged in the pump housing, wherein the rings 16, 18; 17, 19 each have an inlet channel in the pump cover 14 and an outlet channel is assigned in the pump bottom 13.
• the rings 16, 18; 17, 19 each have an inlet channel in the pump cover 14 and an outlet channel is assigned in the pump bottom 13.
• the inlet duct 28 is located on the rings 16, 18 in the section plane.
• the pump cover 14 has a receptacle 29, in which the connection piece 7 of the filter 6 is pressed.
• the connecting piece 7 contains a channel 30 through which the fuel, which was previously sucked in via the filter cloth 31 fastened to the connecting piece 7, flows to the inlet channel 28.
• a region 32 is formed with decreasing in the flow direction cross-section. This funnel-shaped region 32 leads to a first compression of the fuel flowing through and thus to a calming of the flow. Possibly vorhande in the fuel gas bubbles are reduced already this Be ⁇ rich 32nd
• the flow is deflected by 90 °, wherein the radii 33, 34 of the deflection amount to approximately 30% of the height of the flow cross section of the region 32. Due to the large radii 33, 34 is a gentle deflection. Turbulences that can lead to outgassing of the fuel are thus avoided. Furthermore, the steady transition, i. H. without protrusions or edges, between the connecting piece 7 and the inlet channel 28 to supply the fuel in a quiet flow to the impeller.
• the decreasing in the flow direction flow cross section in the inlet channel 28 in turn also contributes to prevent the outgassing of the fuel, or to eliminate existing gas bubbles in the fuel.
• the connecting piece 7 has immediately before the transition to the pump cover 14, a partition wall 35, the flow cross section in two flow cross sections 36, 37 divides the one flow cross section ⁇ .
• the flow cross-section 37 serves to supply a portion of the fuel to the radially inner rings 16, 18.
• Of the associated inlet channel 38 is only partially visible in the section due sei ⁇ ner to the inlet channel 28 offset arrangement.
• Through the partition 35 of the flow of fuel be ⁇ already before reaching the pump cover 14 is divided accordingly to provide for the division of the fuel flow as long as possible routes available that can be used to calm the flow of fuel.

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Chemical & Material Sciences (AREA)
• Combustion & Propulsion (AREA)
• Structures Of Non-Positive Displacement Pumps (AREA)

Priority Applications (3)

Applications Claiming Priority (4)

Publications (1)

Family

ID=38710490

Family Applications (1)

Country Status (5)

Families Citing this family (2)

Citations (5)

Family Cites Families (8)

• 2007
  • 2007-01-24 DE DE102007003555.3A patent/DE102007003555B4/de not_active Expired - Fee Related
  • 2007-08-02 CN CN2007800289397A patent/CN101501340B/zh active Active
  • 2007-08-02 EP EP07802474.2A patent/EP2049801B1/de active Active
  • 2007-08-02 JP JP2009523251A patent/JP4909414B2/ja active Active
  • 2007-08-02 WO PCT/EP2007/058015 patent/WO2008015255A1/de active Application Filing

Patent Citations (5)

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