WO2017174242A1 - Pompe volumétrique destinée à refouler un carburant - Google Patents

Pompe volumétrique destinée à refouler un carburant Download PDF

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Publication number
WO2017174242A1
WO2017174242A1 PCT/EP2017/053367 EP2017053367W WO2017174242A1 WO 2017174242 A1 WO2017174242 A1 WO 2017174242A1 EP 2017053367 W EP2017053367 W EP 2017053367W WO 2017174242 A1 WO2017174242 A1 WO 2017174242A1
Authority
WO
WIPO (PCT)
Prior art keywords
shaft
displacement pump
positive displacement
recess
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.)
Ceased
Application number
PCT/EP2017/053367
Other languages
German (de)
English (en)
Inventor
Tomas Pospisil
Mehmet Gueluem
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of WO2017174242A1 publication Critical patent/WO2017174242A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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
    • F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
    • F04C15/0003—Sealing arrangements in rotary-piston machines or pumps
    • F04C15/0034—Sealing arrangements in rotary-piston machines or pumps for other than the working fluid, i.e. the sealing arrangements are not between working chambers of the machine
    • F04C15/0038—Shaft sealings specially adapted for rotary-piston machines or pumps
    • 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
    • F04C2/30—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
    • F04C2/34—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in groups F04C2/08 or F04C2/22 and relative reciprocation between the co-operating members
    • F04C2/344—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in groups F04C2/08 or F04C2/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member
    • F04C2/3446—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in groups F04C2/08 or F04C2/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member the inner and outer member being in contact along more than one line or surface
    • F04C2/3447—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in groups F04C2/08 or F04C2/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member the inner and outer member being in contact along more than one line or surface the vanes having the form of rollers, slippers or the like
    • 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
    • F04C2240/60—Shafts
    • F04C2240/605—Shaft sleeves or details thereof
    • 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
    • F04C2280/00—Arrangements for preventing or removing deposits or corrosion

Definitions

  • the invention relates to a positive displacement pump for conveying a fuel.
  • a variety of positive displacement pumps for delivering fuel are known in the art.
  • fuel in particular biofuel of different generations (for example rapeseed methyl ester,
  • a positive displacement pump for conveying a fuel wherein the positive displacement pump has a pump chamber and a housing rotatably mounted in the pump chamber
  • Pump rotor which is drivable by a shaft which extends through a shaft passage opening in a wall of the pump chamber, wherein the shaft passage opening has at least one recess for receiving deposits from the fuel.
  • An advantage of the invention is that at least one recess is provided for receiving or collecting deposits.
  • the deposits can settle out of the fuel and be collected therein, without the functionality of the positive displacement pump is generally adversely affected. Due to the at least one recess is usually after the setting of deposits in the
  • Positive displacement pump namely in the at least one recess, the friction between the shaft for driving the pump rotor and the static elements of the positive displacement pump, in particular the bearing of the shaft, not substantially increased.
  • the pump power is not reduced, the pump efficiency by the deposits is not substantially
  • the recess is groove-shaped.
  • the advantage of this is that the recess can be made technically simple. This typically reduces manufacturing costs.
  • the at least one extends
  • the shaft passage opening may be provided in an intermediate housing cover and the at least one recess extending over the entire height of the intermediate housing cover. This is advantageous in that deposits of fuel, which typically due to leaks back into the pump chamber, in particular along the shaft for driving the pump rotor, flows, can collect and settle in the at least one recess. Another advantage of this is that the recess is typically particularly long and thus can deposit a particularly large amount of deposits therein.
  • the shaft passage opening may have at least two, in particular at least three, recesses for receiving deposits from the fuel.
  • An advantage of this is that multiple recesses are available for receiving and collecting deposits. Also at
  • the at least one, in particular the at least two, preferably the at least three, is or are
  • Recesses each disposed over its entire length immediately adjacent to the shaft passage opening. This has the advantage that deposits from the fuel can typically enter the remaining not yet filled part of the at least one recess even if the at least one recess is partially filled. Consequently, as a rule, it is ensured that the entire volume of the at least one recess is substantially completely usable for receiving and collecting deposits from the fuel.
  • the recesses can be at equal angular intervals to each other around the
  • the recesses may be arranged irregularly around the shaft, in particular at different angular distances from each other around the shaft.
  • Recesses typically not substantially affected. A movement of the shaft into the recesses due to an enlargement of the
  • the at least one recess in cross-section perpendicular to a rotation axis of the shaft has a substantially rectangular, in particular square, shape.
  • the at least one recess in cross-section perpendicular to a rotation axis of the shaft has substantially the shape of a circle segment.
  • Fig. 1 is a schematic cross-sectional view of a first
  • Fig. 2 is an exploded view of the first embodiment of
  • FIG. 3 is a perspective cross-sectional view of the first
  • Fig. 4 is a plan view of the intermediate housing cover of
  • FIG. 5 shows a perspective detailed view of the intermediate housing cover from FIG. 4; and FIG. 6 shows a detailed view of the intermediate housing cover from FIG. 4.
  • Fig. 1 shows a schematic cross-sectional view of a first embodiment of the positive displacement pump 10 according to the invention.
  • Fig. 2 shows a
  • Positive displacement pump 10 Fig. 3 shows a perspective cross-sectional view of the first embodiment of the positive displacement pump 10 according to the invention.
  • the positive displacement pump 10 in Fig. 1 is a roller cell pump.
  • Other types of positive displacement pumps, such as e.g. a rotary vane pump are conceivable.
  • the positive displacement pump 10 has a pump housing 80, in which the
  • the displacement pump 10 includes a pump rotor 65 which moves to a pump chamber 30.
  • the pump rotor 65 (also referred to as hydraulic elements) comprises rollers 55, which are pressed upon rotation of the pump rotor 65 against an outer wall 38 (also called the molding path) of the intermediate housing cover 35, and a grooved disc 60, which rotatably with a driver 52 and the rollers 55 connected is. Due to the rotation of the pump rotor 65, enlarged and reduced by the pump rotor 65 delimited partial volumes of the pump chamber 30, whereby a fluid, for example, a (liquid) fuel, is promoted. Other types of fluid, such as a gas, are also conceivable.
  • the pump chamber 30 is bounded at the top by a wall 40 and an intermediate housing cover 35.
  • the intermediate housing cover 35 is also called intermediate housing.
  • the wall 40 is also called the bottom of the
  • a shaft 90 for driving the pump rotor 65 extends through the wall 40 of the
  • the shaft 90 (also referred to as the armature shaft) extends through the shaft passage opening 70 over the entire height of the intermediate housing cover 35 (the height extends from top to bottom in FIG. 1).
  • the shaft passage opening 70 is also referred to as a storage area or storage location.
  • the shaft passage opening 70 is formed circular in cross-section perpendicular to the shaft 90.
  • the shaft 90 is circular in cross-section perpendicular to the axis of rotation 95 of the shaft 90.
  • the intermediate housing cover 35 or the wall 40 has a center
  • the wall 40 thus comprises the pump chamber 30 upwardly bounding part of the intermediate housing cover 35 and the projection
  • the driver 52 is driven by the shaft 90.
  • the driver 52 is located within the intake cover 50.
  • the suction cover 50 limits the
  • the fuel is delivered from the pump chamber 30 through an opening (not shown) in the intermediate housing cover 35.
  • the intermediate housing cover 35 is thus the outlet cover of the pump chamber 30.
  • the fuel in particular bio-fuel of different generations (eg Rapeseed methyl ester, soybean methyl ester, HVO / hydrogenated vegetable oils, GTL / fuels from gas-to-liquid processes), and here increase the friction between shaft 90 and shaft passage opening 70.
  • the shaft passage opening 70 has at least one recess 72 or recess. In Fig. 6, the shaft passage opening 70 has three
  • the three recesses 72, 72 ', 72 are each over their entire length (in Fig. 1 from top to bottom) immediately adjacent to the shaft 90 and the part of the shaft passage opening 70th through which the shaft 90 extends.
  • Intermediate housing cover 35 has corresponding recesses which are the recesses 72, 72 ', 72 "of the shaft passage opening 70.
  • the number of recesses 72, 72 ', 72 may be one, two, three, four, five, or more than five (e.g., seven, eight, or ten).
  • the shaft 90 thus does not extend over the entire surface (in cross-section perpendicular to the axial direction or to the axis of rotation 95 of the shaft 90) through the shaft passage opening 70, but only through part of the surface of the shaft passage opening 70.
  • the shaft 90 does not extend through the shaft Recesses / grooves / wells therethrough. These are designed to receive and collect deposits from the fuel.
  • the shaft passage opening 70 is rotationally symmetrical (apart from the recesses 72, 72 ', 72 ") and serves to support the shaft 90, which drives the pump rotor 65.
  • the recess 72 is or
  • Recesses 72, 72 ', 72 are arranged immediately adjacent to the shaft 90.
  • the at least one recess 72 or the recesses 72, 72 ', 72 "extend over the entire height (the height runs in Fig. 1 from top to bottom) of the intermediate housing cover 35. It is also conceivable, however, that they only have a Part (eg one third or half) of the height of the
  • Intermediate housing cover 35 extends or extend.
  • Fig. 4 shows a plan view of the intermediate housing cover 35 of
  • FIG. 5 shows a perspective detail view of the intermediate housing cover 35 of FIG. 4 and FIG. 6 shows a detailed view of the same area of the
  • the recesses 72, 72 ', 72 "of the positive displacement pump 10 are groove-shaped In Figures 3-5, the recesses 72, 72', 72" have a rectangular shape in cross-section perpendicular to the axis of rotation 95 of the shaft 90.
  • the shape of the recess 72, 72 ', 72 may be square in said cross section.
  • the recesses 72, 72', 72" immediately adjoin the circular area of the shaft
  • the shape of the recess 72, 72 ', 72 "in cross-section perpendicular to the axis of rotation 95 of the shaft 90 essentially has the shape of a circle segment.
  • the chord of the circle segment is also bent, so that the recess 72, 72 ', 72 "directly adjoins the part of the (in cross-section circular) shaft passage opening 70, through which the shaft 90 extends therethrough.
  • the recesses 72, 72 ', 72 "of the positive displacement pump 10 are arranged around the shaft 90 at equidistant distances from each other in FIGS.
  • the recesses 72, 72 ', 72 extend parallel to the axis of rotation 95 of the shaft 90. However, it is also conceivable that one or more of the at least one recess 72, 72', 72" extend helically around the shaft 90.
  • the recesses 72, 72 ', 72 are arranged irregularly around the shaft 90.
  • an angular distance between two Immediately adjacent recesses 72, 72 ', 72 "be only about 90 ° at exactly two existing recesses 72, 72', 72", so that over a
  • Angular range of about 270 ° no recess is present.
  • Recesses 72, 72 ', 72 over the upper half of
  • Intermediate housing cover 35 extends, while a second recess 72 ', 72 "and second recesses 72, 72', 72" extends over the lower half of the intermediate housing cover 35.
  • the shaft 90 of the positive displacement pump 10 may be integrally formed with the pump rotor 65.
  • the shaft 90 can be driven electrically, e.g. by means of an electric drive motor 20.
  • Other types of drive are conceivable.
  • the electric drive motor 20 represents the pressure side.
  • the recess 72 or recesses 72, 72 ', 72 "of the displacement pump 10 can along the height direction of the intermediate housing cover 35 (in Fig. 1 from top to bottom extending) have a constant width.
  • the recess 72 or the recesses 72, 72 ', 72 "taper from top to bottom or vice versa, and also a periodic widening of the recess 72 or the recesses 72, 72', 72" from top to bottom is conceivable.
  • the depth of the recess 72 or recesses 72, 72 ', 72 can be between approximately 0.5 mm and approximately 3 mm, and the depth runs from left to right or vice versa in FIG
  • the recess 72 or recesses 72, 72 ', 72 may be dependent on the wall thickness.
  • Wall thickness may be between about 1.0 mm and about 2.0 mm, e.g. 1.5 mm.
  • the upper part of the shaft passage opening 70 may be larger
  • the displacement pump 10 is typically used for conveying fuel, in particular diesel, to a high-pressure pump or to an engine motor vehicle, in particular a car or a truck.
  • the Positive displacement pump 10 is usually within one
  • Fuel delivery module arranged within a
  • Fuel tanks is located.
  • the fuel delivery module is usually arranged on the vehicle chassis.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

L'invention concerne une pompe volumétrique (10) destinée à refouler un carburant, ladite pompe volumétrique (10) comprenant une chambre (30) et un rotor (65) monté rotatif dans la chambre (30) de la pompe, ledit rotor pouvant être entraîné par un arbre (90) qui s'étend à travers un orifice de passage d'arbre (70) dans une paroi (40) de la chambre (30) de la pompe, l'orifice de passage d'arbre (70) comportant au moins un évidement (72, 72', 72") destiné à recevoir des dépôts issus du carburant.
PCT/EP2017/053367 2016-04-04 2017-02-15 Pompe volumétrique destinée à refouler un carburant Ceased WO2017174242A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102016205551.8A DE102016205551A1 (de) 2016-04-04 2016-04-04 Verdrängerpumpe zum Fördern eines Kraftstoffs
DE102016205551.8 2016-04-04

Publications (1)

Publication Number Publication Date
WO2017174242A1 true WO2017174242A1 (fr) 2017-10-12

Family

ID=58054125

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2017/053367 Ceased WO2017174242A1 (fr) 2016-04-04 2017-02-15 Pompe volumétrique destinée à refouler un carburant

Country Status (2)

Country Link
DE (1) DE102016205551A1 (fr)
WO (1) WO2017174242A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5190450A (en) * 1992-03-06 1993-03-02 Eastman Kodak Company Gear pump for high viscosity materials
US5997262A (en) * 1997-04-10 1999-12-07 Walbro Corporation Screw pins for a gear rotor fuel pump assembly
US6769889B1 (en) * 2003-04-02 2004-08-03 Delphi Technologies, Inc. Balanced pressure gerotor fuel pump
DE102012209152A1 (de) * 2012-05-31 2013-12-05 Robert Bosch Gmbh Zahnradmaschine mit hydraulischer Verlagerung der Zahnränder

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5190450A (en) * 1992-03-06 1993-03-02 Eastman Kodak Company Gear pump for high viscosity materials
US5997262A (en) * 1997-04-10 1999-12-07 Walbro Corporation Screw pins for a gear rotor fuel pump assembly
US6769889B1 (en) * 2003-04-02 2004-08-03 Delphi Technologies, Inc. Balanced pressure gerotor fuel pump
DE102012209152A1 (de) * 2012-05-31 2013-12-05 Robert Bosch Gmbh Zahnradmaschine mit hydraulischer Verlagerung der Zahnränder

Also Published As

Publication number Publication date
DE102016205551A1 (de) 2017-10-05

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