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
• • 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
  • F04C15/0057—Driving elements, brakes, couplings, transmission specially adapted for machines or pumps
  • F04C15/0061—Means for transmitting movement from the prime mover to driven parts of the pump, e.g. clutches, couplings, transmissions
  • F04C15/0073—Couplings between rotors and input or output shafts acting by interengaging or mating parts, i.e. positive coupling of rotor and shaft
• • 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
  • F04C15/0057—Driving elements, brakes, couplings, transmission specially adapted for machines or pumps
  • F04C15/0076—Fixing rotors on shafts, e.g. by clamping together hub and shaft
• • 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
  • F04C2/082—Details specially related to intermeshing engagement type machines or pumps
  • F04C2/086—Carter
• • 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
  • F04C2230/20—Manufacture essentially without removing material
  • F04C2230/21—Manufacture essentially without removing material by casting
• • 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
  • F04C2230/20—Manufacture essentially without removing material
  • F04C2230/23—Manufacture essentially without removing material by permanently joining parts together
• • 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
  • F04C2240/50—Bearings
  • F04C2240/51—Bearings for cantilever assemblies
• • 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
  • F04C2240/80—Other components
  • F04C2240/801—Wear plates

Definitions

• Gear pump with a drive shaft, a drive gear and a driven gear
• the invention relates to a gear pump according to the preamble of claim 1.
• gear pumps which are used for example as Vor sortingpumpen in a fuel delivery of an internal combustion engine.
• a gear pump is described, in which for the purpose of reducing wear, a lubrication of movable parts of the pump with the aid of the liquid to be conveyed, in particular by diesel fuel, is achieved.
• connections are made between the various areas of this gear pump, so that the pumped medium is able to lubricate moving parts of the pump.
• the invention is based on the object, the fatigue strength of a
• the invention relates to a gear pump, as used for example as a pre-feed pump in a fuel supply system of an internal combustion engine.
• the gear pump according to the invention may also be intended to promote gasoline, special fuels or alcohols or other suitable liquids. It is assumed that wear phenomena in gear pumps occur preferentially at locations where elements interact by sliding friction, and
• a housing surface parallel to the toothed wheels of the toothed wheel feed pump has an insert part which is cast or pressed into a housing section. It may be favorable, the insert at the
• the housing portion may have a matching recess in the form of a recess into which the insert is pressed and thus permanently connected to the housing portion.
• the insert forms a low-wear thrust bearing at least for the
• Coupling element for example in the form of an annular disc whose outer radius is equal to or greater than the radius of the coupling element, wherein for the remaining housing portion another, cheaper and optimal for its interests material can be used. In this way, the fatigue strength of a gear pump is improved without large
• the solution according to the invention is particularly effective when the insert covers a radius range of the drive gear and / or of the gearwheel to be driven.
• Coupling element used insert larger dimensions, so that the Radius range of the drive gear is included.
• a correspondingly improved axial bearing can be achieved for the drive gear.
• the housing section in the region of the gearwheel to be driven can likewise be supplemented with an insert part. In this way, the axial bearing is also improved for the driven gear.
• the insert is made of brass or a steel alloy. These materials are particularly well suited for the formation of material pairs for durable solid plain bearings.
• the gear pump according to the invention when the housing section belongs to the housing of a high pressure pump, and the drive shaft is an end portion of a drive shaft of the high pressure pump.
• high-pressure pumps are used in motor vehicles for fuel delivery. For example, this task is divided into two different pumps by using a first fuel delivery pump as one
• Pre-feed pump is designed which sucks the fuel from a fuel tank and compressed to a comparatively low Vor fundamentaldruck.
• a second fuel delivery pump is designed as a high-pressure piston pump and further compresses the fuel supplied by the prefeed pump.
• Pre-feed pump for example, an inventive
• Gear pump be used. Due to the direct coupling of the gear pump with a high-pressure pump, a particularly compact unit is created, which also has a long life by the measures according to the invention.
• a very concrete and a particularly long life and at the same time low manufacturing costs having configuration of the gear pump provides that the drive gear and the gear to be driven made of a sintered steel, the coupling element of a chrome brass steel, and the drive shaft of a chromium steel, and the housing portion of an aluminum material are.
• the drive gear and the gear to be driven made of a sintered steel, the coupling element of a chrome brass steel, and the drive shaft of a chromium steel, and the housing portion of an aluminum material are.
• it consists of
• Housing surface is planned together with the radially surrounding housing surface.
• the housing surface and the insert can be planned in one operation, whereby the flatness of the housing surface is increased overall and thus relative unevenness of the insert is avoided with respect to the radially surrounding housing surface.
• Figure 1 is an illustration of a fuel conveyor for a
• Figure 2 shows a first embodiment of a gear pump
• Figure 3 shows a second embodiment of a gear pump.
• Figure 1 shows an illustration of a fuel delivery device for a
• Internal combustion engine 10 which is installed in a motor vehicle, not shown. Schematically illustrated is an internal combustion engine housing 12, to which a gear pump 14 is arranged as a prefeed pump together with a high-pressure delivery module 16, which together form the fuel delivery device. At the gear pump 14 are initially a suction line 18 and output a connecting line 20 is connected. The suction line 18 is fed from a fuel tank 22. The high-pressure delivery module 16 is initially connected to the connecting line 20 and output to a high-pressure line 24, which leads to a common rail function block 26, not further explained.
• the housings of the gear transfer pump 14 and the high-pressure delivery module 16 are at a right angle to each other on an outer side of the
• Internal combustion engine housing 12 is arranged.
• One only in the section view 2 drawn drive shaft 28 drives the gear pump 14 axially, whereas the high pressure conveyor module 16 is operated radially via a non-visible cam or eccentric.
• the suction line 18 and the connecting line 20 are for better illustration on a
• FIG. 2 shows a first embodiment of a gear pump 14.
• End portion 29 protrudes from a housing portion 31 of the gear pump 14 forming region of the high-pressure pump housing 30.
• an annular coupling element 32 is positively connected, for example via a two-plane, or non-positively connected so that a torque from the drive shaft 28 to the
• Coupling element 32 can be transferred. That from one
• Chrommanganstahl produced coupling element 32 engages axially in one
• a driven gear 36 is arranged in addition to the drive gear 34. Both gears 34 and 36 are guided on a respective bearing pin 37 and mesh with each other.
• a housing cover 38 completes together with the housing portion 31, a gear pump housing.
• Other elements of the gear pump 14, such as an inlet port, an outlet port, delivery channels, sealing elements or possible devices for lubricating the moving parts are not shown.
• an insert 42 is pressed, facing the drive gear 34 Outer surface flush with the housing surface 40 of the high-pressure pump housing 30.
• the said outer surface itself forms a part of the housing surface 40a of the housing portion 31.
• the flatness between the housing surface 40a of the insert 42 and the surrounding housing surface 40 is achieved by a common processing.
• the insert 42 is designed as an annular disc whose radially outer edge slightly projects beyond the radially outer edge of the coupling element 32.
• the drive shaft 28 rotates and drives the drive gear 34 via the coupling element 32. It touches that
• Figure 3 shows a second embodiment of a gear pump 14, which is largely identical to the embodiment of Figure 2. It will be described below mainly the differences.
• a gear pump 14 which is largely identical to the embodiment of Figure 2. It will be described below mainly the differences.
• the insert 42 has a larger diameter
• Gear pump it is possible to include by further enlarging the surface of the insert also the gear to be driven, in order to also a possible wear of the driven gear
• the insert thus covers a radius range of both gears. It may be useful not to form the insert as an annular disc, but as an outline rectangular or oval surface or approximately in the form of an "8".

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Rotary Pumps (AREA)
• Details And Applications Of Rotary Liquid Pumps (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=43535929

Family Applications (1)

Country Status (5)

Families Citing this family (3)

Citations (2)

Family Cites Families (10)

• 2009
  • 2009-09-09 DE DE200910029293 patent/DE102009029293A1/de not_active Withdrawn
• 2010
  • 2010-07-23 WO PCT/EP2010/060694 patent/WO2011029657A2/de active Application Filing
  • 2010-07-23 EP EP10737035A patent/EP2475890A2/de not_active Withdrawn
  • 2010-07-23 CN CN201080050615.5A patent/CN102713297B/zh not_active Expired - Fee Related
• 2012
  • 2012-03-05 IN IN1959DEN2012 patent/IN2012DN01959A/en unknown

Patent Citations (2)

Non-Patent Citations (1)

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