EP1847713B1 - Pompe rotative réglable à usure réduite - Google Patents

Pompe rotative réglable à usure réduite Download PDF

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Publication number
EP1847713B1
EP1847713B1 EP07106407A EP07106407A EP1847713B1 EP 1847713 B1 EP1847713 B1 EP 1847713B1 EP 07106407 A EP07106407 A EP 07106407A EP 07106407 A EP07106407 A EP 07106407A EP 1847713 B1 EP1847713 B1 EP 1847713B1
Authority
EP
European Patent Office
Prior art keywords
sliding
rotary pump
actuating member
pump according
track
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.)
Active
Application number
EP07106407A
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German (de)
English (en)
Other versions
EP1847713A3 (fr
EP1847713A2 (fr
Inventor
Christof Dr. Lamparski
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.)
Schwaebische Huettenwerke Automotive GmbH
Original Assignee
Schwaebische Huettenwerke Automotive 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.)
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Publication date
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Application filed by Schwaebische Huettenwerke Automotive GmbH filed Critical Schwaebische Huettenwerke Automotive GmbH
Priority to PL07106407T priority Critical patent/PL1847713T3/pl
Priority to EP10178105.2A priority patent/EP2327881B1/fr
Priority to EP18170712.6A priority patent/EP3376031B1/fr
Publication of EP1847713A2 publication Critical patent/EP1847713A2/fr
Publication of EP1847713A3 publication Critical patent/EP1847713A3/fr
Application granted granted Critical
Publication of EP1847713B1 publication Critical patent/EP1847713B1/fr
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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
    • F04C14/00—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations
    • F04C14/18—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations characterised by varying the volume of the working chamber
    • F04C14/185—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations characterised by varying the volume of the working chamber by varying the useful pumping length of the cooperating members in the axial direction
    • 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
    • F04C2/18—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 similar tooth forms
    • 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
    • F04C2230/90—Improving properties of machine parts
    • F04C2230/91—Coating
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2201/00—Metals
    • F05C2201/90—Alloys not otherwise provided for
    • F05C2201/903—Aluminium alloy, e.g. AlCuMgPb F34,37
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2203/00—Non-metallic inorganic materials
    • F05C2203/08—Ceramics; Oxides
    • F05C2203/0865—Oxide ceramics
    • F05C2203/0869—Aluminium oxide
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2225/00—Synthetic polymers, e.g. plastics; Rubber
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2225/00—Synthetic polymers, e.g. plastics; Rubber
    • F05C2225/04—PTFE [PolyTetraFluorEthylene]
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2225/00—Synthetic polymers, e.g. plastics; Rubber
    • F05C2225/06—Polyamides, e.g. NYLON
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2225/00—Synthetic polymers, e.g. plastics; Rubber
    • F05C2225/12—Polyetheretherketones, e.g. PEEK
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2251/00—Material properties
    • F05C2251/10—Hardness
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2251/00—Material properties
    • F05C2251/14—Self lubricating materials; Solid lubricants
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49229—Prime mover or fluid pump making
    • Y10T29/49236—Fluid pump or compressor making
    • Y10T29/49242—Screw or gear type, e.g., Moineau type

Definitions

  • the invention relates to a rotary pump with adjustable delivery volume and a method for their preparation.
  • the rotary pump can be used in particular as a lubricating oil pump for the lubricating oil supply of an internal combustion engine, in particular a motor vehicle engine.
  • Automotive fuel oil pumping is driven as a function of the speed of the engine to be supplied with lubricating oil, usually directly or via a mechanical transmission from the engine.
  • the speed of the pump increases accordingly with the speed of the motor.
  • rotary pumps have a constant specific delivery volume, ie deliver substantially the same amount of fluid per revolution at each speed, the delivery volume increases proportionally with the pump speed.
  • the demand of the engine increases up to a certain limit speed also approximately proportional to the engine speed, but kinks after reaching the limit speed or at least flattens, so that the rotary pump promotes exceeding the limit speed above demand.
  • adjustable rotary pumps have been developed.
  • adjustable rotary pumps are internal and external gear pumps from the DE 102 22 131 B4 known as the closest prior art.
  • adjustable vane pumps are known.
  • the pumps each include a reciprocable actuator.
  • the conveying rotor is either a gear wheel or an impeller.
  • the axial engagement length of two gears is adjusted.
  • the respective actuator is subjected to a force, for example, directly with the high pressure fluid. The actuating force counteracts a spring member.
  • pumps of the type mentioned in Increasingly made of light metal alloys, especially Al alloys are surprisingly subject to the frictional contact surfaces of the pump housing and the actuator a special wear and determine the life of the pump.
  • a friction wear-reducing coating of a moving component known, which is formed by a lubricating varnish or a soluble ladder polymer.
  • a soluble conductive polymer is called Polybenzoylphenylen.
  • the coating may contain solid lubricants, such as graphite or PTFE.
  • the ladder polymer or bonded coating may also be mixed with hard microparticles or nanoparticles.
  • the coated component is not specified by type, but only piston of internal combustion engines are exemplified.
  • the DE 42 00 305 A1 proposes the example of a vane pump to reduce wear, the insertion of a sheet of spring steel.
  • the DE 35 28 651 A1 proposes to relieve lateral forces and thus also as a wear-reducing measure to provide pocket-shaped recesses in an actuating piston to adjust over this auxiliary measure a uniform over the circumference of the actuating piston pressure.
  • the invention is based on a rotary pump of the positive displacement type, which comprises a housing with a delivery chamber, a delivery rotor which can be rotated in the delivery chamber about a rotation axis and at least one actuator which can be moved back and forth in the housing.
  • the actuator may surround the conveyor rotor or preferably be arranged to an end face of the conveyor rotor.
  • An actuator surrounding the conveyor rotor can in particular with innenachsigen pumps, such as gerotor pumps and vane pumps, provided as a rotatably mounted eccentric ring as shown in DE 102 22 131 B4 or the EP 0 846 861 B1 be known or formed as a cam ring.
  • an actuator as known from external gear pumps, for example the DE 102 22 131 B4 , Is arranged to a front side of the conveyor rotor and axially seals the delivery chamber at the respective end face.
  • Such an actuator forms an actuating piston which is axially movable back and forth along the axis of rotation of the feed wheel.
  • An actuator surrounding the conveyor rotor is rotatably or pivotally mounted, but may alternatively be mounted linearly movable.
  • the delivery chamber has a low pressure side and a high pressure side. At least one inlet is located on the low-pressure side and at least one outlet for a fluid to be delivered is arranged on the high-pressure side.
  • the low pressure side of the delivery chamber and the entire upstream part of the system where the pump is installed form the low pressure side of the pump.
  • the high pressure side of the delivery chamber and the entire adjoining downstream part of the system form the high pressure side of the pump.
  • the low pressure side extends to a reservoir for the fluid, and the high pressure side extends to at least the most downstream point of use, which requires high fluid pressure.
  • the actuator is acted upon in the direction of its mobility with a force that depends on the pressure of the fluid of the high-pressure side of the pump or other relevant for the needs of the size of the system.
  • the pressure can be directly at the outlet of the Delivery chamber or a downstream pump outlet or from a further downstream located in the system, for example, the last point of consumption, be removed.
  • the actuating force instead of the pressure or in addition to the pressure, for example, the temperature of the fluid or a component in the system in which the pump is installed, for example, an engine temperature.
  • other or further physical quantities are used to determine the actuating force.
  • the actuating force can be generated by means of an additional actuator, for example an electric motor.
  • the actuator is directly acted upon by the pressure of the fluid, ie it is acted upon by the pressurized fluid during operation of the pump.
  • the actuator is applied in preferred embodiments, in particular in embodiments in which it is acted upon by the pressure fluid, counteracting the adjusting force with a elasticity force.
  • the elasticity force is generated by a elastic member, preferably by a mechanical spring.
  • the actuator is in sliding contact with the housing in that the housing forms a raceway and the actuator form an actuator sliding surface and the actuator is guided by means of its sliding surface of the raceway in the sliding contact.
  • the actuator may additionally be performed otherwise, for example in a pivot joint, but more preferably it is only guided by the track.
  • the actuator sliding surface or the raceway is or are formed from a sliding material.
  • the sliding material is a plastic.
  • the sliding material may form a surface coating.
  • the relevant component, ie, a housing part forming the raceway or the actuator may consist exclusively or at least substantially of the sliding material.
  • both the actuator sliding surface and the raceway are made of a sliding material, either the same or each of a different sliding material. Wear reductions, however, are already achieved when either only the actuator sliding surface or only the raceway is made of the sliding material, with the preference given to the use of the sliding material for the actuator sliding surface.
  • Adhesion may be the wear-determining friction mechanism, in particular, when the frictionally engaged friction partners are so smooth that the friction mechanism of the furrowing or abrasion fades into the background.
  • the sliding partners i. H. the sliding surface of the actuator or the plurality of actuators and the raceway or multiple raceways of the housing, designed so that the adhesion tendency is significantly reduced in the friction system compared to the usual surfaces for the sliding of aluminum alloys.
  • the sliding material is advantageously chosen so that it has an adhesive energy or free surface energy which is at most half as large as the adhesion energy of pure aluminum. This condition is met in particular by plastic materials.
  • the adhesion energy or free binding energy increases with the density of the free electrons. The requirement for a low adhesion energy therefore meet materials with a low density of free electrons.
  • a material group which is particularly suitable as a sliding material are temperature-resistant thermoplastics.
  • the polymer or optionally a plurality of polymers of the plastic sliding material are advantageously slip-modified, ie the plastic contains a slip additive which improves the sliding properties.
  • Such a sliding material is also ideally suited in cases where only one of the sliding partners of the friction system consists of sliding material.
  • a preferred slip additive is graphite.
  • a preferred example from this group is polytetrafluoroethylene (PTFE).
  • both graphite and at least one fluoropolymer are admixed to the polymer, copolymer, the polymer mixture or the polymer blend as a slip additive.
  • the amount of slip additive should be at least 10% by weight in total, more preferably the slip additive is 20% ⁇ 5% in total. If different materials form the slip additive, the individual components should at least be substantially equal.
  • plastic lubricants containing 10 ⁇ 2 wt% graphite and 10 ⁇ 2 wt% fluoropolymer are preferred.
  • the addition of fiber material is also considered to be advantageous, carbon fibers being preferred as the fiber material.
  • the plastic slip material preferably contains 10 ⁇ 5 wt .-%, more preferably 10 ⁇ 3 wt .-% fiber material.
  • the actuator is formed in preferred first embodiments of the Kunststoffgleitmaterial, preferably by injection molding.
  • it consists of the plastic.
  • inserts can be embedded in the plastic;
  • the actuator consists at least substantially of the plastic sliding material.
  • the actuator may also be a housing part which forms the raceway, be formed from the Kunststoffgleitmaterial, preferably in the injection molding and solely from the plastic or in the above sense, at least substantially consist of the plastic.
  • the housing is formed of a metal, preferably a light metal, and the track is formed by an existing of the Kunststoffgleitmaterial insert part, preferably a bushing.
  • the actuator and a housing part forming the raceway, in particular insert part can each be formed from the plastic sliding material.
  • the actuator consists at least substantially of the Kunststoffgleitmaterial
  • the career is formed by a Kunststoffgleitmaterial or possibly another sliding material only as a surface coating or as an uncoated metal surface.
  • At least one of the sliding contact surfaces is formed by a thin sliding layer.
  • the actuator or the housing forming the raceway consists or consist of the superficial sliding layer of a different material, namely a carrier material.
  • the carrier material may in particular be a metal, preferably a light metal.
  • Candidates for light metals are mainly aluminum, aluminum alloys and magnesium alloys.
  • both sliding surfaces are preferably formed as superficial sliding layers each made of a plastic sliding material with a significantly lower adhesion energy than aluminum or magnesium. If only one of the sliding surfaces of the two sliding partners consists of the sliding material, it is preferably the sliding surface of the actuator.
  • the superficial sliding layer can be formed by applying the sliding material.
  • Plastic sliding material is applied, preferably the blank formed from the carrier material is encapsulated with the plastic.
  • the plastic sliding material should have a thermal elongation that comes as close as possible to the elongation of the carrier material.
  • conversion of light-metal carrier materials results in a metal oxide-ceramic sliding layer or a nitride layer.
  • the support material is aluminum or an aluminum alloy
  • the sliding layer is preferably obtained by anodization. By anodizing, it is possible in particular to form a so-called Hardcoat® sliding layer (HC layer) or more preferably a so-called Hardcoat® smooth sliding layer (HC-GL layer).
  • Hardcoat® smooth electrolytes consist of a mixture of oxalic acid and additives.
  • sulfuric acid H 2 SO 4
  • magnesium and magnesium alloys as support material anodic oxidation processes are known for providing a metal-ceramic sliding layer comparable with Al 2 O 3 sliding layers, for example the so-called DOW method.
  • the ceramic sliding layer is preferably distributed PTFE, the ceramic is impregnated with PTFE, so to speak. Such a sliding layer may be provided as a friction partner for the plastic sliding layer.
  • the housing or else just one housing part forming the raceway can be shaped in particular from aluminum or an aluminum alloy.
  • the housing or the relevant housing part is preferably cast.
  • the aluminum alloy is therefore preferably an Al casting alloy.
  • the actuator does not consist at least substantially of plastic sliding material, it is preferably formed from aluminum or an aluminum alloy, preferably a casting alloy, preferably by casting and subsequent extruding or by sintering and calibrating.
  • the particular aluminum alloy preferably contains 10 ⁇ 2% by weight of silicon.
  • the respective alloy also contains copper, but with a proportion of at most 4 wt .-%, preferably at most 3 wt .-%. Furthermore, she can do one smaller proportion of iron.
  • the housing part preferably also other parts of the housing, is or are preferably molded in sand casting or die-casting, with the die cast offering primarily for larger and the sand casting for smaller series.
  • chill casting can also be used.
  • a particularly preferred alloy for the housing part and also for the housing as a whole is AlSi8Cu3, if it is formed by sand casting or chill casting, and AlSi9Cu3 plus a low Fe content, if it is diecast.
  • Nitrides preferred as the sliding material are titanium carbonitride (TiCN) and in particular nitrided steel. Steels with a high chromium content, preferably with molybdenum content and also preferably with vanadium, are used as nitrided steels, for example 30CrMoV9. TiCN is used as a surface coating on a light metal carrier material. If nitrided steel forms the sliding material, the corresponding steel is preferably the carrier material. In particular, the actuator may be formed from the steel and the actuator slide surface may be nitrided steel.
  • a DLC coating ( D iamond L ike C arbon), and in particular a tungsten carbide (WC) coating, also has a wear-reducing effect.
  • a DLC sliding layer can be produced in particular by plasma coating.
  • Bonded coatings are also suitable sliding materials, namely for a combination of a lubricating varnish in one and a plastic material in the other sliding partner.
  • the bonded coating consists of an organic or inorganic binder, one or more solid lubricants and Additives.
  • a solid lubricant in particular MoS 2 , graphite or PTFE are used individually or in combination.
  • the surface to be coated is pretreated by secondarily forming a phosphate layer on the surface to be coated.
  • a special anti-friction varnish is Ferroprint, which contains fine steel flakes as a solid lubricant.
  • FIG. 1 shows an external gear pump in a cross section.
  • a delivery chamber is formed in which two externally toothed conveyor rotors 1 and 2 in the form of externally toothed gears rotatably mounted about parallel axes of rotation R 1 and R 2 .
  • the conveying rotor 1 is rotationally driven, for example, by the crankshaft of an internal combustion engine of a motor vehicle.
  • the conveyor rotors 1 and 2 are meshed with each other, so that in a rotary drive of the conveyor rotor 1 of the thus meshing conveyor rotor 2 is also rotationally driven.
  • the housing part 3 forms the conveying rotors 1 and 2 facing in the radial direction in each case a radial sealing surface 9, which wraps around the respective conveying rotor 1 or 2 on the circumference, forming a narrow radial sealing gap.
  • the housing 3, 6 further forms on each end side of the conveyor rotor 1 and this axially facing an axial sealing surface, of which in FIG. 1 the sealing surface 7 can be seen.
  • the conveying rotor 2 is axially facing at its two end faces each formed a further axial sealing surface, of which in cross section of FIG. 1 the sealing surface 17 can be seen.
  • the conveyor rotor 2 is axially movable relative to the conveyor rotor 1, ie, along its axis of rotation R 2 , so that the engagement length of the conveyor rotors 1 and 2 and, correspondingly, the delivery rate can be changed.
  • the conveyor rotor 2 assumes an axial position with an axial overlap, ie engagement length, which is already reduced in comparison to the maximum engagement length.
  • the conveyor rotor 2 is part of an adjustment consisting of a bearing pin 14, an actuator 15, an actuator 16 and the rotatably mounted between the actuators 15 and 16 on the bearing pin 14 conveyor rotor 2.
  • the bearing pin 14 connects the actuators 15 and 16 torsionally rigid with each other.
  • the actuator 16 forms the conveying rotor 2 facing the axial sealing surface 17.
  • the actuator 15 forms the other axial sealing surface 18.
  • the entire adjustment is mounted in a sliding chamber of the pump housing 3, 6 axially displaceable back and forth against rotation.
  • the housing is formed by the housing part 3 and the housing cover 6 firmly connected thereto.
  • the housing cover 6 is formed with a base, whose end surface facing the conveying rotor 1 forms the sealing surface 7.
  • the housing part 3 forms on the opposite end side of the conveyor rotor 1 axially facing the fourth axial sealing surface 8.
  • the sealing surface 8 is provided on its side facing the adjusting unit with a circular segment-shaped cutout for the actuator 15.
  • the actuator 16 is provided on its side facing the conveyor rotor 1 with a circular segment-shaped cutout for the sealing surface 7 forming the base 6.
  • the sealing surface 7 corresponds to the sealing surface 8 and corresponds to the sealing surface 17 of the sealing surface 18th
  • the adjusting members 15 and 16 of the embodiment are adjusting piston.
  • the sliding chamber in which the adjusting unit is axially movable back and forth, comprises a limited from the back of the actuator 15 subspace 10 and a limited from the back of the actuator 16 subspace 11.
  • the subspace 11 is connected to the high pressure side of the pump and is constantly pressurized there with branched pressure fluid, which thus acts on the back of the actuator 16.
  • a mechanical compression spring is arranged as the elastic member 12, the elastic force acts on the back of the actuator 15.
  • the elastic member 12 counteracts acting in the subspace 11 on the actuator 16 pressing force.
  • the regulation of such external gear pumps is known and therefore needs no explanation.
  • the regulation may in particular be in accordance with DE 102 22 1.31 B4 be designed.
  • the sealing surfaces 7, 8, 17 and 18 are each provided on the high pressure side with a discharge pocket.
  • the housing part 3 guides the actuators 15 and 16 in sliding contact.
  • the housing part 3 form a raceway 3a and the housing part 3 together with the cover 6 a raceway 3b, 6b.
  • the actuators 15 and 16 each form an actuator slide surface 15a and 16a on its outer peripheral surface. More specifically, in the sliding contact, the raceway 3a and the actuator sliding surface 15a on the one hand, and the raceway 3b, 6b and the actuator sliding surface 16a on the other hand.
  • a special sliding material forms at least one of the sliding partners of the relevant friction system.
  • either the raceway 3a or the actuator slide surface 15a may be formed by the sliding material.
  • the same sliding material may further constitute both the raceway 3a and the actuator sliding surface 15a.
  • the two sliding surfaces 3a and 15a can each be formed by a different sliding material. The same applies with respect to the other friction system 3b, 6b / 16a. If only one of the sliding partners of the respective friction system consists of the sliding material, the same sliding material is expediently used in each case. If both friction partners consist of a sliding material, the actuator sliding surfaces 15a and 16a are each formed by the same sliding material or the raceways 3a, 3b and 6b are each formed by the same sliding material.
  • one of the sliding partners may consist of a metal alloy, preferably a light metal alloy, it corresponds to preferred exemplary embodiments if each of the sliding partners is formed by a special sliding material of low adhesion energy.
  • the sliding material of the sliding partner of the respective friction system may be the same or different.
  • the actuators 15 and 16 may be formed as a whole from the sliding material or from a carrier material, preferably a light metal alloy, and superficially each have a sliding layer of the sliding material.
  • the housing, in the embodiment, the housing part 3 and the cover 6, may also be formed of plastic, in preferred embodiments, however, at least the housing part 3, preferably also the cover 6, cast from a metal alloy, preferably a light metal alloy. As a light metal in particular aluminum alloys in question. The following are preferred examples:
  • Housing part 3 and cover 6 each made of AlSi9Cu3 (Fe) die cast Actuators 15 and 16: PES compound: 10% by weight of carbon fibers, 10% by weight of graphite, 10% by weight of PTFE, remainder PES (eg ULTRASON®)
  • Example 1 the housing part 3 and the lid 6 are each die-cast from the same aluminum alloy, namely AlSi9Cu3.
  • the alloy may contain a small amount of Fe.
  • the raceways 3a, 3b and 6b are obtained by mechanical machining accurately.
  • the actuators 15 and 16 are each molded as a whole from the specified plastic sliding material.
  • the sliding surfaces 15a and 16a are accurately produced by mechanical processing.
  • Housing part 3 and cover 6 each made of AlSi9Cu3 (Fe) die cast Actuators 15 and 16: PES compound: 10% by weight of carbon fibers, 10% by weight of graphite, 10% by weight of PTFE, remainder PES (eg ULTRASON®) Runways 3a, 3b and 6b: coated with slip-modified plastic or lubricating varnish
  • example 2 corresponds to example 1.
  • a sliding layer of plastic sliding material or bonded coating forms the raceways 3a, 3b and 6b.
  • the plastic sliding material may in particular be the material of the actuators 15 and 16.
  • Housing part 3 and cover 6 each made of AlSi9Cu3 (Fe) die cast Actuators 15 and 16: Extruded parts of semi-finished aluminum casting as support material, for example AlSi8Cu3 Sliding surfaces 15a and 16a: PES compound: 10% by weight of carbon fibers, 10% by weight of graphite, 10% by weight of PTFE, balance PES (for example ULTRASON®)
  • the housing part 3 and the cover 6 correspond to Example 1.
  • the actuators 15 and 16 each consist of the same Al alloy, preferably AlSi8Cu3. They are formed from a cast semi-finished aluminum alloy by extrusion. Subsequently, at least the circumferential surfaces are each provided with a sliding layer of the plastic sliding material. Instead of molding the blanks of the actuators 15 and 16 by extrusion, the blanks can be formed by sintering and calibrating. The extruded or calibrated blanks are heated and overmolded in a mold with the plastic sliding material, preferably completely enveloped.

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

Claims (28)

  1. Pompe rotative à débit réglable, comprenant
    a) un carter (3, 6)
    b) une chambre de refoulement formée dans le carter (3, 6) avec une entrée (4) pour un fluide sur un côté basse pression et une sortie (5) pour le fluide sur un côté haute pression de la pompe,
    c) au moins un rotor de refoulement (2) tournant dans la chambre de refoulement autour d'un axe de rotation (R2),
    d) un organe de réglage (15) disposé sur une face frontale du rotor de refoulement (2) ou entourant le rotor de refoulement, lequel organe est déplaçable en va et vient dans le carter (3, 6) pour le réglage du débit,
    e) l'organe de réglage (15) pouvant être sollicité, dans la direction de son déplacement, par une force de réglage qui dépend des besoins d'un récepteur à alimenter en fluide,
    f) et une glissière (3a), formée dans le carter (3, 6), qui guide l'organe de réglage (15) sur une surface de glissement d'organe de réglage (15a) dans un contact à glissement,
    g) un matériau glissant, qui forme au moins l'une parmi la glissière (3a) et la surface de glissement de l'organe de réglage (15a), étant une matière plastique, de façon à s'opposer à l'usure par frottement d'oscillation.
  2. Pompe rotative à débit réglable, selon la revendication précédente, dans laquelle le matériau glissant, présente une énergie d'adhérence qui est au plus égale à la moitié de l'énergie d'adhérence de l'aluminium.
  3. Pompe rotative selon l'une des revendications précédentes, dans laquelle
    - l'organe de réglage (15), un autre organe de réglage (16) et le rotor de refoulement (2) font partie intégrante d'une unité de réglage (2, 15, 16) déplaçable dans son ensemble, en va et vient, dans le carter (3, 6),
    - les organes de réglage (15, 16) sont disposés chacun sur l'une des faces frontales du rotor de refoulement (2) et dans le carter (3, 6) est formée une autre glissière (3b, 6b) qui guide l'autre organe de réglage (16) sur sa surface de glissement d'organe de réglage (16a) dans un contact glissant,
    - et au moins soit l'une parmi la glissière (3b, 6b) et la surface de glissement d'organe de réglage (16a) de l'autre organe de réglage (16) étant constituée du matériau glissant.
  4. Pompe rotative selon l'une des revendications précédentes, dans laquelle le matériau glissant est une matière thermoplastique dont le glissement est modifié.
  5. Pompe rotative selon l'une des revendications précédentes, dans laquelle le matériau glissant est un composé polymère constitué d'au moins un polymère résistant aux hautes températures, contenant un matériau fibreux et un additif de glissement.
  6. Pompe rotative selon la revendication précédente, dans laquelle l'additif de glissement comprend au moins l'un parmi le graphite et un polymère fluoré, de préférence du PTFE.
  7. Pompe rotative selon l'une des deux revendications précédentes, dans laquelle le matériau fibreux comprend des fibres de carbone ou est constitué de fibres de carbone.
  8. Pompe rotative selon l'une des trois revendications précédentes, dans laquelle le matériau glissant présente au moins l'une des caractéristiques suivantes :
    - la proportion de polymère est d'au moins 60 % en poids et au plus de 80 % en poids,
    - la proportion d'additif de glissement est d'au moins 10 % en poids et au plus de 30 % en poids,
    - la proportion de matériau fibreux est d'au moins 5 % en poids et au plus de 15 % en poids.
  9. Pompe rotative selon l'une des revendications précédentes, dans laquelle le matériau glissant est une matière plastique et une matière de base de la matière plastique est un polymère y compris un copolymère, un mélange de polymères ou un mélange de polymères du groupe constitué de polyéthersulfone (PES), polysulfone (PSU) surface de polyphénylène (PPS), polyéthercétone (PAEK, PEK, PEEK), polyamide (PA) et polyphtalamide (PPA).
  10. Pompe rotative selon l'une des revendications précédentes, dans laquelle l'autre parmi la surface de glissement de l'organe de réglage (15a, 16a) et la glissière (3a, 3b, 6b) est formée par une couche de métal-céramique.
  11. Pompe rotative selon la revendication précédente, dans laquelle la couche est une couche dure ou une couche dure et lisse et contient de préférence du PTFE.
  12. Pompe rotative selon l'une des revendications précédentes, dans laquelle de l'acier nitruré ou du TiCn forme l'autre parmi la glissière (3a, 3b, 6b), et la surface de glissement d'organe de réglage (15a, 16a).
  13. Pompe rotative selon l'une des revendications précédentes, dans laquelle une partie de carter (3, 6), comportant la glissière (3a, 3b, 6b), est constituée au moins pour l'essentiel de métal ou est formée d'un métal en tant que matériau de support et sur le matériau de support est appliquée une couche de glissement, formant la glissière (3a, 3b, 3c) et constituée du matériau glissant.
  14. Pompe rotative selon la revendication précédente, dans laquelle un matériau de fonte, de préférence un matériau de fonte moulée sous pression, un matériau de fonte moulée en coquille ou un matériau de fonte moulée au sable à structure appropriée, forme la partie de carter (3, 6) ou le matériau de support de la partie de carter (3, 6).
  15. Pompe rotative selon l'une des revendications précédentes, dans laquelle l'organe de réglage (15, 16), y compris la surface de glissement de l'organe de réglage (15a, 16a), est constitué au moins pour l'essentiel de métal constituant le matériau de support et sur le matériau de support est appliquée une couche de glissement, formant la surface de glissement d'organe de réglage (15a, 16a) et constituée du matériau glissant.
  16. Pompe rotative selon une combinaison des revendications 13 et 15, dans laquelle le métal de la partie de carter (3, 6) et le métal de l'organe de réglage (15, 16) contiennent le même élément métallique au moins en tant que constituant principal.
  17. Pompe rotative selon l'une des quatre revendications précédentes, dans laquelle le métal est un métal léger, de préférence de l'aluminium ou un alliage à base d'aluminium.
  18. Pompe rotative selon l'une des cinq revendications précédentes, dans laquelle le métal est de l'aluminium ou un alliage à base d'aluminium, qui contient du silicium et de préférence au moins l'un parmi le cuivre et le fer.
  19. Pompe rotative selon l'une des revendications 1 à 14 ou 16 à 18, dans laquelle l'organe de réglage (15, 16) est formé du matériau glissant.
  20. Pompe rotative selon l'une des revendications 1 à 12 ou 15 à 19, dans laquelle le carter (3, 6) ou au moins une partie de carter (3), formant la glissière (3a, 3b), est formée dans le matériau glissant.
  21. Pompe rotative selon l'une des revendications précédentes, dans laquelle il est prévu un organe élastique (12) s'opposant à la force de réglage.
  22. Pompe rotative selon l'une des revendications précédentes, dans laquelle l'organe de réglage (15, 16) est un piston de réglage qui peut être soumis à l'action du fluide du côté haute pression.
  23. Pompe rotative selon l'une des revendications précédentes, dans laquelle le rotor de refoulement (2) et l'organe de réglage (15, 16) sont déplaçables axialement par rapport à l'axe de rotation (R2).
  24. Pompe rotative selon l'une des revendications précédentes, comprenant un autre rotor de refoulement (1) qui peut tourner dans la chambre de refoulement autour d'un autre axe de rotation (R1) et les rotors de refoulement (1, 2) sont en prise de refoulement entre eux.
  25. Pompe rotative selon l'une des revendications précédentes, qui est une pompe à axe extérieur et de préférence une pompe à roue dentée extérieure.
  26. Procédé de fabrication de la pompe rotative selon l'une des revendications précédentes, dans lequel
    a) une partie de carter (3, 6) formant la glissière (3a, 3b, 6b) est constituée d'un métal léger et
    b) l'organe de réglage (15, 16) est formé dans le même métal léger ou dans un autre métal léger et
    c) la partie de carter (3, 6) est revêtue du matériau glissant pour produire la glissière (3a, 3b, 6b) ou l'organe de réglage (15, 16) est revêtu du matériau glissant pour produire la surface de glissement d'organe de réglage (15a, 16a), à savoir un revêtement de matière plastique pour s'opposer à l'usure par frottement d'oscillation.
  27. Procédé selon la revendication précédente, dans lequel la partie de carter (3) est formée dans un alliage à base d'aluminium, en fonte moulée au sable, en fonte moulée en coquille ou en fonte moulée sous pression, et la glissière (3a, 3b, 6b) est réalisée de préférence par usinage mécanique du matériau de fonte.
  28. Procédé selon l'une des deux revendications précédentes, dans lequel l'organe de réglage (15, 16) est revêtu d'une matière plastique à glissement modifié pour réaliser la surface de glissement d'organe de réglage (15a, 16a) .
EP07106407A 2006-04-19 2007-04-18 Pompe rotative réglable à usure réduite Active EP1847713B1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
PL07106407T PL1847713T3 (pl) 2006-04-19 2007-04-18 Regulowana pompa wirnikowa ze zmniejszonym zużyciem
EP10178105.2A EP2327881B1 (fr) 2006-04-19 2007-04-18 Pompe rotative réglable dotée d'une réduction d'usure
EP18170712.6A EP3376031B1 (fr) 2006-04-19 2007-04-18 Pompe de rotation ajustable à usure réduite

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102006018124A DE102006018124A1 (de) 2006-04-19 2006-04-19 Verstellbare Rotationspumpe mit Verschleißminderung

Related Child Applications (4)

Application Number Title Priority Date Filing Date
EP10178105.2A Division EP2327881B1 (fr) 2006-04-19 2007-04-18 Pompe rotative réglable dotée d'une réduction d'usure
EP10178105.2A Previously-Filed-Application EP2327881B1 (fr) 2006-04-19 2007-04-18 Pompe rotative réglable dotée d'une réduction d'usure
EP18170712.6A Division EP3376031B1 (fr) 2006-04-19 2007-04-18 Pompe de rotation ajustable à usure réduite
EP10178105.2 Division-Into 2010-09-21

Publications (3)

Publication Number Publication Date
EP1847713A2 EP1847713A2 (fr) 2007-10-24
EP1847713A3 EP1847713A3 (fr) 2008-06-11
EP1847713B1 true EP1847713B1 (fr) 2011-03-02

Family

ID=38283219

Family Applications (3)

Application Number Title Priority Date Filing Date
EP07106407A Active EP1847713B1 (fr) 2006-04-19 2007-04-18 Pompe rotative réglable à usure réduite
EP18170712.6A Not-in-force EP3376031B1 (fr) 2006-04-19 2007-04-18 Pompe de rotation ajustable à usure réduite
EP10178105.2A Active EP2327881B1 (fr) 2006-04-19 2007-04-18 Pompe rotative réglable dotée d'une réduction d'usure

Family Applications After (2)

Application Number Title Priority Date Filing Date
EP18170712.6A Not-in-force EP3376031B1 (fr) 2006-04-19 2007-04-18 Pompe de rotation ajustable à usure réduite
EP10178105.2A Active EP2327881B1 (fr) 2006-04-19 2007-04-18 Pompe rotative réglable dotée d'une réduction d'usure

Country Status (7)

Country Link
US (3) US20070248481A1 (fr)
EP (3) EP1847713B1 (fr)
JP (1) JP4662559B2 (fr)
AT (2) ATE500423T1 (fr)
DE (4) DE102006018124A1 (fr)
HU (1) HUE040650T2 (fr)
PL (1) PL1847713T3 (fr)

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DE102019106660A1 (de) * 2019-03-15 2020-09-17 Wagner Gmbh & Co. Kg Steuerventil mit einer Anschlussfläche für mehrere Ventilports

Also Published As

Publication number Publication date
EP3376031B1 (fr) 2021-12-22
US20110182760A1 (en) 2011-07-28
DE202007018987U1 (de) 2010-05-27
HUE040650T2 (hu) 2019-03-28
US20120219448A1 (en) 2012-08-30
US20070248481A1 (en) 2007-10-25
DE10178105T1 (de) 2012-09-06
EP2327881A3 (fr) 2014-03-26
DE102006018124A1 (de) 2007-10-25
US8770955B2 (en) 2014-07-08
JP4662559B2 (ja) 2011-03-30
PL1847713T3 (pl) 2011-06-30
AT11651U1 (de) 2011-02-15
DE10178105T8 (de) 2013-04-25
EP1847713A3 (fr) 2008-06-11
EP3376031A1 (fr) 2018-09-19
JP2007285300A (ja) 2007-11-01
US8186982B2 (en) 2012-05-29
ATE500423T1 (de) 2011-03-15
EP2327881B1 (fr) 2018-05-30
EP1847713A2 (fr) 2007-10-24
DE502007006577D1 (de) 2011-04-14
EP2327881A2 (fr) 2011-06-01

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