EP1672218B1 - Pompe - Google Patents
Pompe Download PDFInfo
- Publication number
- EP1672218B1 EP1672218B1 EP05025842.5A EP05025842A EP1672218B1 EP 1672218 B1 EP1672218 B1 EP 1672218B1 EP 05025842 A EP05025842 A EP 05025842A EP 1672218 B1 EP1672218 B1 EP 1672218B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- coating
- contour
- coated
- displacement pump
- rotor
- 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
Links
- 239000011248 coating agent Substances 0.000 claims description 49
- 238000000576 coating method Methods 0.000 claims description 49
- 238000006073 displacement reaction Methods 0.000 claims description 29
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 5
- 229910052782 aluminium Inorganic materials 0.000 claims description 5
- 229910000838 Al alloy Inorganic materials 0.000 claims description 2
- 239000004411 aluminium Substances 0.000 claims 1
- 239000003792 electrolyte Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000002048 anodisation reaction Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000005868 electrolysis reaction Methods 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 210000003734 kidney Anatomy 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
- F01C21/00—Component parts, details or accessories not provided for in groups F01C1/00 - F01C20/00
- F01C21/10—Outer members for co-operation with rotary pistons; Casings
- F01C21/104—Stators; Members defining the outer boundaries of the working chamber
- F01C21/108—Stators; Members defining the outer boundaries of the working chamber with an axial surface, e.g. side plates
-
- 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
- F04C2/10—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member
-
- 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
-
- 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
Definitions
- the invention relates to a displacement pump, in particular a vane pump, with a pump element, in particular a rotor which is rotatably disposed within a contour ring between two side surfaces which are provided with a coating, as from the document US 2001/0016173 known, which discloses the preamble of claim 1.
- Positive displacement pumps in particular vane pumps, of the generic type are known. They have a rotor which rotates between two housing side surfaces or side plates within a contour ring, which is also referred to as a lifting ring.
- the rotor is rotatably mounted and has radial slots in which wings are slidably received.
- the rotor, the lifting ring and the housing side surfaces or side plates each delimit between two adjacent blades a displacement, the volume of which changes when the rotor is rotated. It comes on the suction side of the vane pump to an increase in volume, which causes a suction of a working fluid in the respective displacement, and on the pressure side to a volume decrease, which causes a conveying of the working fluid from the respective displacement.
- a suction region and a pressure region are formed, wherein the suction region is arranged in the region of increasing volumes and the pressure region in the region of smaller volumes.
- the suction area communicates with a suction port and the pressure area communicates with a pressure port of the vane pump.
- friction may occur at the contact surfaces between the rotor and the housing side surfaces.
- the object of the invention is to provide a positive displacement pump, in particular a vane pump, with a pump element, in particular a rotor which is rotatably arranged within a contour ring between two side surfaces, which are provided with a coating, which has a longer life than conventional positive displacement pumps ,
- the object is in a positive displacement pump, in particular a vane pump, with a pump element, in particular a rotor which is rotatably arranged within a contour ring between two side surfaces, which are provided with a coating are, solved in that at least one of the side surfaces is provided locally only in the area with a coating on which the contour ring is applied.
- the entire area to which the contour ring is applied may be provided with a coating. But it is also possible that only a part of the area to which the contour ring is applied, is provided with a coating.
- the displacement pump is preferably a vane pump. But it may also be, for example, a roller-cell pump or a gear pump.
- the contour ring is also referred to as a lifting ring.
- the area of the side surface within the contour ring is recessed from the coating.
- a preferred embodiment of the positive displacement pump is characterized in that the coated area of the side surface is essentially formed by a circular disk surface.
- the inner contour and the outer radius of the annular disk surface preferably correspond at least approximately to the inner contour and the outer radius of the contour ring, wherein the contour has an essentially elliptical shape.
- a further preferred embodiment of the positive displacement pump is characterized in that the coating is provided only in a partial region of the region of the side surface against which the contoured ring bears.
- the coating is formed of a harder material than the side surfaces.
- a further preferred embodiment of the positive displacement pump is characterized in that the coated portion of the region of the side surface on which the contoured ring abuts, is formed by a circular disk surface whose inner contour is greater than the inner contour of the contour ring.
- the outer radius of the annular disk surface is preferably the same size as the outer radius of the contour ring.
- Another preferred embodiment of the positive displacement pump is characterized in that the coating is raised on the side surface.
- This type of coating can be produced, for example, by covering the areas of the side surface which are not to be coated.
- Another preferred embodiment of the positive displacement pump is characterized in that the coating is embedded in the side surface. This ensures that the partially coated side surface, viewed overall, has a flat surface.
- the side surface to be coated is preferably formed from aluminum or an aluminum alloy.
- the coating is preferably an oxide layer, which is also referred to as Eloxal Mrs.
- the coating is applied by electrolysis and is also referred to as anodization or anodization, in which the workpiece to be coated serves as the anode and, for example, a lead plate as the cathode, which are introduced into a reaction space or adjoin it.
- the reaction space is flowed through by an electrolyte, for example by dilute sulfuric acid.
- the anodized anodization layer is hard and very resistant to chemical attack.
- a first method for producing a coated side surface of a previously described positive displacement pump comprises the following steps: Before the application of the coating, the surface of the side surface which is not to be coated is covered; then the uncovered surface of the side surface is provided with the coating. This has the advantage that the area not to be coated can be completely cut out when the coating is applied.
- a second method for producing a coated side surface of a previously described positive displacement pump comprises the following steps: Before the application of the coating, the surface to be coated is processed such that the surface to be coated is recessed with respect to the surface not to be coated; then the complete side surface is provided with the coating; Finally, the coating is removed from the surface not to be coated.
- This procedure has the advantage that the coating of the surface not to be coated is raised in relation to the coating of the surface of the side surface to be coated. This simplifies removal of the coating from the non-coating surface of the side surface.
- the machining of the surface to be coated is done by cutting.
- a step is turned on the side surface.
- the removal of the coating takes place from the surface not to be coated, for example by fine turning.
- the entire side surface is also abraded or finely ground. In this case, first the raised area of the side surface is removed and thus the area in which no coating is desired.
- the displacement pump according to the invention is preferably a vane pump. It may also be a roller-cell pump or a gear pump. Such pumps can be used for example as Lenkhelfpumpen for motor vehicles.
- the vane pump according to the invention comprises a rotor which essentially has the shape of a circular disk.
- the rotor is rotatably mounted within a cam ring.
- the lifting ring in turn is arranged between two side surfaces of a housing, which may be formed in one or more parts.
- the side surfaces may also be formed by so-called side plates within a housing.
- the inner contour of the cam ring is chosen so that there are two diametrically opposite pump spaces between the outer circumference of the rotor and the inner surface of the cam ring.
- the inner contour of the cam ring on two so-called small circle areas the diameters of which substantially correspond to the outer diameter of the rotor.
- the inner contour of the cam ring on two so-called great circle areas whose diameter is greater than the outer diameter of the rotor, so that it comes to the formation of the pump chambers.
- the small circle and large circle areas are connected by transition areas, so that essentially results in an elliptical contour.
- the rotor has a circular cylindrical shell-shaped peripheral surface which is bounded by two circular end faces. Distributed over its peripheral surface, the rotor has a plurality of radially extending slots. Within the slots radially movable vanes are arranged, which extend over the entire width of the rotor.
- the rotor, the cam ring and the housing side surfaces each delimit between two adjacent vanes a displacer whose volume changes as the rotor rotates. It comes on the suction side of the vane pump to an increase in volume, which causes a suction of a working fluid in the displacement. At the same time it comes on the pressure side of the vane pump to a volume decrease, which causes a conveying of the working medium from the respective displacement. According to the rotational movement of the rotor are suction areas and
- the suction areas are connected via suction cups with suction ports of the vane pump, while the pressure ranges are connected via pressure chambers with pressure ports of the vane pump.
- These side surfaces of the housing are sealingly against the end faces of the rotor or the side edges of the wings.
- FIG. 1 and 2 is a side plate 1 of a vane pump according to the invention shown in section.
- the side plate 1 has substantially the shape of a circular disk 4, which has a central through hole 5.
- the central through hole 5 serves to pass through a drive shaft, which in turn serves to drive the rotor.
- at least one further passage opening 7 is recessed in the side plate 1, which represents the pressure or suction kidney.
- An end face of the side plate 1 forms a side surface 10, which limits the interior of the positive displacement pump on one side in the installed state.
- the side surface 10 has radially inwardly on a central portion 12 which is bounded radially outwardly by a (not shown) contour ring.
- Untererielnuten 14, 15 are provided with a rectangular cross-section. At Untererielnuten 14, 15 are formed during operation of the positive displacement pump in the rotor radially within the wing formed in slits Untererielkammem over and pressurized. This underfloor supply ensures that the wings are always in contact with the inner contour of the cam ring or contour ring during operation.
- a step 18 is screwed into the side surface 10.
- the step 18 it is achieved that the part of the side surface 10 arranged radially outside the step 18 is recessed with respect to the rest of the side surface.
- the complete side surface 10 is provided with a coating 20.
- the thickness of the coating 20 is the same everywhere.
- the step 18 it is achieved that the area of the coating 20 within the peripheral step 18 is raised in relation to the area radially outside the step 18.
- the application of the coating is preferably carried out by an electrolysis process.
- some DC current flows through an electrolytic bath, that is, through an electrolyte.
- the electrolyte is accommodated in a reaction space which can be formed by a chamber closed to the environment.
- oxygen is formed at an anode, which combines with the aluminum, from which the side surface 10 is preferably formed, to form a firmly adhering oxide layer (Al 2 O 3 ), the so-called anodized layer.
- the coating is mechanically removed in the area where no coating is desired.
- This method is cost-neutral compared to conventional methods, since the work steps facing the tread and final lapping or fine grinding to achieve an adequate surface finish anyway required.
- FIG. 2 is the side plate 1 off FIG. 1 shown after removal of the coating radially within the stage 18.
- the coating has been removed not only in the region 12, but also partially in the region radially outside of the region 12 and radially within the step 18.
- the coating 20 has substantially the shape of a circular disk, the outer diameter of the outer diameter of the Side plate 1 corresponds.
- the inner contour of the annular disc which preferably has a rectangular cross-section, is preferably slightly larger than the inner contour of the contour ring.
- the inner contour of the annular disk of the coating 20 may also be as large as the inner contour of the contour ring.
- the application of the local coating 20 can also be achieved by covering the areas not to be coated.
- This solution has the advantage that wells, such as the Untererielnieren 14, 15 or partially the pressure and
- the anodized coating prevents the contour ring from being incorporated into the side plates due to micromotion during operation.
- the aluminum surface of the pressure plates should serve as a contact surface in the event of contact or friction, since aluminum is used against steel (rotor and blade)
- Wing has better runflat properties than an anodized layer, and an anodized layer can produce splatter splinters when crushed under pressure, destroying the pump.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Rotary Pumps (AREA)
- Details And Applications Of Rotary Liquid Pumps (AREA)
Claims (7)
- Pompe volumétrique, en particulier pompe à ailettes, comprenant un élément de pompage, en particulier un rotor, qui est monté rotatif à l'intérieur d'une bague de contour entre deux surfaces latérales (10) qui sont pourvues d'un revêtement, caractérisée en ce qu'au moins une des surfaces latérales (10) n'est pourvue d'un revêtement que localement dans la zone contre laquelle repose la bague de contour.
- Pompe volumétrique selon la revendication 1, caractérisée en ce que la zone revêtue de la surface latérale (10) est formée sensiblement par une surface de disque annulaire.
- Pompe volumétrique selon l'une quelconque des revendications précédentes, caractérisée en ce que le revêtement (20) n'est déposé que dans une zone partielle de la zone de la surface latérale (10) contre laquelle repose la bague de contour.
- Pompe volumétrique selon la revendication 3, caractérisée en ce que la zone partielle revêtue de la zone de la surface latérale (10) contre laquelle repose la bague de contour est formée par une surface de disque annulaire dont le contour intérieur est plus grand que le contour intérieur de la bague de contour.
- Pompe volumétrique selon l'une quelconque des revendications précédentes, caractérisée en ce que le revêtement sur la surface latérale est en relief.
- Pompe volumétrique selon l'une quelconque des revendications 1 à 4, caractérisée en ce que le revêtement (20) est inséré dans la surface latérale (10).
- Pompe volumétrique selon l'une quelconque des revendications précédentes, caractérisée en ce que la surface latérale (10) à revêtir est composée d'aluminium ou d'un alliage d'aluminium.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102004061019 | 2004-12-18 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1672218A2 EP1672218A2 (fr) | 2006-06-21 |
EP1672218A3 EP1672218A3 (fr) | 2012-12-05 |
EP1672218B1 true EP1672218B1 (fr) | 2013-11-06 |
Family
ID=36096142
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP05025842.5A Active EP1672218B1 (fr) | 2004-12-18 | 2005-11-26 | Pompe |
Country Status (3)
Country | Link |
---|---|
US (1) | US8066497B2 (fr) |
EP (1) | EP1672218B1 (fr) |
ES (1) | ES2440771T3 (fr) |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1451801A1 (de) * | 1965-03-10 | 1970-04-16 | Audi Nsu Auto Union Ag | Rotationskolben-Brennkraftmaschine mit einer auf den Seitenteilen aufgebrachten Spritzschicht bzw. Verfahren zum Aufspritzen dieser Spritzschicht |
FR1600297A (fr) * | 1968-12-31 | 1970-07-20 | ||
US4099490A (en) * | 1972-02-01 | 1978-07-11 | Daimler-Benz Aktiengesellschaft | Method for producing a housing casing for a rotary piston internal combustion engine |
US4067671A (en) * | 1976-06-01 | 1978-01-10 | Caterpillar Tractor Co. | Means for locking housing parts against relative movement |
US4618318A (en) * | 1982-12-06 | 1986-10-21 | Hansen Engine Corporation | Vane and seal assembly |
DE3312868C2 (de) * | 1983-04-09 | 1986-03-20 | Glyco-Antriebstechnik Gmbh, 6200 Wiesbaden | Hydropumpe |
EP0906512B1 (fr) * | 1996-06-21 | 2002-10-23 | LuK Fahrzeug-Hydraulik GmbH & Co. KG | Pompe a ailettes |
DE19952605A1 (de) * | 1999-11-02 | 2001-05-10 | Luk Fahrzeug Hydraulik | Pumpe für ein flüssiges oder gasförmiges Medium |
US6250900B1 (en) * | 1999-11-15 | 2001-06-26 | Sauer-Danfoss Inc. | Positive displacement hydraulic unit with near-zero side clearance |
JP2001214869A (ja) * | 2000-01-31 | 2001-08-10 | Sumitomo Electric Ind Ltd | オイルポンプ |
JP2002202074A (ja) * | 2000-12-28 | 2002-07-19 | Toyota Industries Corp | スクロール型圧縮機 |
JP2003211084A (ja) * | 2001-10-26 | 2003-07-29 | Seiko Instruments Inc | フッ素系樹脂コーティング方法およびこの方法を用いた摺動部材、気体圧縮機 |
-
2005
- 2005-11-26 ES ES05025842.5T patent/ES2440771T3/es active Active
- 2005-11-26 EP EP05025842.5A patent/EP1672218B1/fr active Active
- 2005-12-12 US US11/299,932 patent/US8066497B2/en active Active
Also Published As
Publication number | Publication date |
---|---|
US20060153722A1 (en) | 2006-07-13 |
EP1672218A2 (fr) | 2006-06-21 |
ES2440771T3 (es) | 2014-01-30 |
US8066497B2 (en) | 2011-11-29 |
EP1672218A3 (fr) | 2012-12-05 |
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