EP2999808A1 - Method for coating a pump component - Google Patents
Method for coating a pump componentInfo
- Publication number
- EP2999808A1 EP2999808A1 EP14722109.7A EP14722109A EP2999808A1 EP 2999808 A1 EP2999808 A1 EP 2999808A1 EP 14722109 A EP14722109 A EP 14722109A EP 2999808 A1 EP2999808 A1 EP 2999808A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- blank
- coating
- recess
- axial piston
- piston 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.)
- Withdrawn
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
- F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
- F04B1/26—Control
- F04B1/30—Control of machines or pumps with rotary cylinder blocks
- F04B1/32—Control of machines or pumps with rotary cylinder blocks by varying the relative positions of a swash plate and a cylinder block
- F04B1/328—Control of machines or pumps with rotary cylinder blocks by varying the relative positions of a swash plate and a cylinder block by changing the inclination of the axis of the cylinder barrel relative to the swash plate
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C24/00—Coating starting from inorganic powder
- C23C24/08—Coating starting from inorganic powder by application of heat or pressure and heat
- C23C24/10—Coating starting from inorganic powder by application of heat or pressure and heat with intermediate formation of a liquid phase in the layer
- C23C24/103—Coating with metallic material, i.e. metals or metal alloys, optionally comprising hard particles, e.g. oxides, carbides or nitrides
- C23C24/106—Coating with metal alloys or metal elements only
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01B—MACHINES OR ENGINES, IN GENERAL OR OF POSITIVE-DISPLACEMENT TYPE, e.g. STEAM ENGINES
- F01B3/00—Reciprocating-piston machines or engines with cylinder axes coaxial with, or parallel or inclined to, main shaft axis
- F01B3/10—Control of working-fluid admission or discharge peculiar thereto
- F01B3/103—Control of working-fluid admission or discharge peculiar thereto for machines with rotary cylinder block
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01B—MACHINES OR ENGINES, IN GENERAL OR OF POSITIVE-DISPLACEMENT TYPE, e.g. STEAM ENGINES
- F01B3/00—Reciprocating-piston machines or engines with cylinder axes coaxial with, or parallel or inclined to, main shaft axis
- F01B3/10—Control of working-fluid admission or discharge peculiar thereto
- F01B3/103—Control of working-fluid admission or discharge peculiar thereto for machines with rotary cylinder block
- F01B3/106—Control of working-fluid admission or discharge peculiar thereto for machines with rotary cylinder block by changing the inclination of the swash plate
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03C—POSITIVE-DISPLACEMENT ENGINES DRIVEN BY LIQUIDS
- F03C1/00—Reciprocating-piston liquid engines
- F03C1/02—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders
- F03C1/06—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinder axes generally coaxial with, or parallel or inclined to, main shaft axis
- F03C1/0602—Component parts, details
- F03C1/0605—Adaptations of pistons
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
- F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
- F04B1/122—Details or component parts, e.g. valves, sealings or lubrication means
- F04B1/124—Pistons
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
- F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
- F04B1/122—Details or component parts, e.g. valves, sealings or lubrication means
- F04B1/124—Pistons
- F04B1/126—Piston shoe retaining means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
- F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
- F04B1/20—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block
- F04B1/2014—Details or component parts
- F04B1/2035—Cylinder barrels
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
- F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
- F04B1/20—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block
- F04B1/2014—Details or component parts
- F04B1/2064—Housings
- F04B1/2071—Bearings for cylinder barrels
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
- F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
- F04B1/20—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block
- F04B1/2014—Details or component parts
- F04B1/2078—Swash plates
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
- F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
- F04B1/20—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block
- F04B1/2014—Details or component parts
- F04B1/2078—Swash plates
- F04B1/2085—Bearings for swash plates or driving axles
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
- F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
- F04B1/26—Control
- F04B1/30—Control of machines or pumps with rotary cylinder blocks
- F04B1/303—Control of machines or pumps with rotary cylinder blocks by turning the valve plate
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
- F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
- F04B1/26—Control
- F04B1/30—Control of machines or pumps with rotary cylinder blocks
- F04B1/32—Control of machines or pumps with rotary cylinder blocks by varying the relative positions of a swash plate and a cylinder block
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
- F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
- F04B1/26—Control
- F04B1/30—Control of machines or pumps with rotary cylinder blocks
- F04B1/32—Control of machines or pumps with rotary cylinder blocks by varying the relative positions of a swash plate and a cylinder block
- F04B1/324—Control of machines or pumps with rotary cylinder blocks by varying the relative positions of a swash plate and a cylinder block by changing the inclination of the swash plate
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B11/00—Equalisation of pulses, e.g. by use of air vessels; Counteracting cavitation
- F04B11/0091—Equalisation of pulses, e.g. by use of air vessels; Counteracting cavitation using a special shape of fluid pass, e.g. throttles, ducts
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/08—Regulating by delivery pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/14—Pistons, piston-rods or piston-rod connections
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/02—Parts of sliding-contact bearings
- F16C33/04—Brasses; Bushes; Linings
- F16C33/06—Sliding surface mainly made of metal
- F16C33/14—Special methods of manufacture; Running-in
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01B—MACHINES OR ENGINES, IN GENERAL OR OF POSITIVE-DISPLACEMENT TYPE, e.g. STEAM ENGINES
- F01B3/00—Reciprocating-piston machines or engines with cylinder axes coaxial with, or parallel or inclined to, main shaft axis
- F01B3/0082—Details
- F01B3/0085—Pistons
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B19/00—Machines or pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B1/00 - F04B17/00
- F04B19/20—Other positive-displacement pumps
- F04B19/22—Other positive-displacement pumps of reciprocating-piston type
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B27/00—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders
- F04B27/08—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders coaxial with, or parallel or inclined to, main shaft axis
- F04B27/0873—Component parts, e.g. sealings; Manufacturing or assembly thereof
- F04B27/0878—Pistons
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2204/00—Metallic materials; Alloys
- F16C2204/30—Alloys based on one of tin, lead, antimony, bismuth, indium, e.g. materials for providing sliding surfaces
- F16C2204/34—Alloys based on tin
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2223/00—Surface treatments; Hardening; Coating
- F16C2223/30—Coating surfaces
- F16C2223/46—Coating surfaces by welding, e.g. by using a laser to build a layer
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2360/00—Engines or pumps
Definitions
- the invention relates to a method for coating a pump component, in particular a part of an axial piston pump.
- Pumps of modern design such as those used in hydraulic systems in the form of axial piston pumps, contain components with surface areas that are heavily loaded during operation.
- components in question In order to ensure safe operation over long periods of operation, it is customary to provide components in question, at least on the heavily loaded areas, with a coating which gives the component in question the desired surface properties at critical points.
- a coating which gives the component in question the desired surface properties at critical points.
- sliding or bearing points are to be formed, which allow wear and low friction relative movement between the relevant component and a fixed pump component.
- the invention has the object to provide a method that allows the formation of a coating with particularly advantageous surface properties.
- this object is achieved by a method which comprises the method steps specified in claim 1.
- the invention provides for the coating, a solder powder method in which powdered coating material is filled in a correspondingly shaped in the carrier material of the blank recess and melted therein. The melting takes place under a protective gas atmosphere and leads to a solder joint, so that the formed layer is inseparably connected to the carrier material of the blank.
- finished material removal for example by machining by turning and / or milling.
- a coating in the form of a bronze layer by powdered tin bronze CuSn6 is filled into the respective recess.
- the blank is pre-turned from steel, for example from a carbon steel.
- the melting can be carried out without pressure in a vacuum oven.
- the melting process takes place without temperature differences between steel and bronze. Errors that occur during casting, such as binding errors, soldering cracks and the like, can be excluded.
- a tempering state can be achieved.
- a tempering steel is used for this purpose as a material of the blank, wherein tempering states in the range of 750 to 850 N / mm 2 can be realized.
- the inventive method is particularly suitable for forming a coating on a control mirror and / or a sliding block of an axial piston pump.
- a blank in the form of a circular disk can be produced with a central passage and a recess in the form of an annular space between an unrecipitated peripheral edge and an edge surrounding the passage in the form of an unrecipitated annular rib is formed on the blank become.
- a blank in the form of a circular cylindrical body can be produced, wherein in the one cylindrical surface of a depression in the form of a bounded by an undentered peripheral edge circular surface is formed.
- FIG. 1 shows a longitudinal section of an axial piston pump with components which have a coating produced by the process according to the invention
- Fig. 2 is a perspective oblique view of the control mirror of
- Axial piston pump of Figure 1 which is provided with a coating produced by the process according to the invention.
- Fig. 3 is a perspective oblique view of a blank, which for the
- a longitudinal section of the blank of Fig. 3; 3 is an oblique perspective view of the blank of FIGS. 3 and 4 with the pulverulent coating material filled in its formed recess; a longitudinal section of the blank of Figure 3 and 4 with filled in the recess powdery coating material.
- a longitudinal section of the finished after completion of the blank control mirror which is shown in Figure 2 in a perspective view.
- a longitudinal section of a blank for the production of a coated according to the inventive sliding shoe for the axial piston pump of Fig. 1; 8 shows a longitudinal section of the blank of FIG. 8 filled with pulverulent coating material filled into the depression formed and a longitudinal section of the sliding shoe finished after the blank of FIG. 9 has been finished.
- FIG. 1 shows a swashplate-type axial piston pump which has components which have a coating 24 produced by the method according to the invention.
- a rotatably driven cylinder drum 1 is provided in a pump housing 7, which is associated with a swash plate 3, which is pivotable for adjusting the delivery capacity and thus the system pressure generated by the pump, wherein the pivot axis of the swash plate 3 in Fig. 1 with 37 is designated.
- the pump housing 7 has a top part 9 lying in the drawing and a lower part 11.
- a drive shaft 13 for the cylinder drum 1 is mounted for the rotational movement about the axis designated 15 in the upper part 9 in a tapered roller bearing 16 and in the lower part 1 1 by means of a sliding bearing 1 7.
- the cylinder spaces 19 of the cylinder drum 1 with piston 21 guided therein are in contact with a control mirror 23 on the lower side of the cylinder 1 1.
- the control plate 23 has control openings 25 and 26 for connections between a suction-side connection 29 and a pressure-side connection 27 into the cylinder chambers 19 of the cylinder drum 1.
- the control mirror 23, which is shown separately in FIGS. 2 and 7, has a coating 24, see FIG.
- a shoe 31 is shown separately.
- the sliding blocks 31 are connected to the piston top side of the associated piston 21 in a ball joint-like manner, the ball joint being formed by a ball head 34 on the piston 21 and a ball socket 36 in the sliding block 31 is formed.
- the ball joint is secured by a flanging 38 on the shoe 31.
- Oil holes 35 in the ball head 34 and shoe 31 form an access for fluid such as hydraulic oil for lubrication of the sliding surface 33 and a hydrostatic discharge of the shoes.
- the sliding shoes 31 also have a coating 24 produced by the method according to the invention.
- the swash plate 3 is adjustable about the pivot axis 37, which lies in the plane of the sliding surface 33 of the swash plate 3 for adjusting the delivery volume.
- This pivot axis 37 is defined by the swash plate bearing formed between swash plate 3 and upper part 9. This has on the upper part 9, a plastic bearing shell 39, on which the swash plate 3 is guided with a dome-shaped sliding surface 41.
- an upwardly conically widening passage opening 43 in the swash plate 3 is formed for the passage of the drive shaft 13.
- On both sides of the opening 43 are provided from the sliding surface 41 projecting guide rails 45 as part of the swash plate bearing.
- Pivot axis 37 is the left in Fig. 1 side of the swash plate 3 screwed to a pivot lever 47 which extends parallel to the axis 15 adjacent to the cylinder drum 1 and is movable at its in Fig. 1 lower end 49 in perpendicular to the plane extending direction, to cause a corresponding pivoting movement of the swash plate 3 about the pivot axis 37.
- the pivoting lever 47 is screwed to the associated side of the swashplate 3 with an internal thread located in a bore 51.
- a joint tube 5, which forms part of a supply and pressing device is, as shown in FIG. 1, arranged laterally next to the cylinder drum 1 in parallel to the axis 15 extending direction.
- the block 55 includes a connection channel, not visible in FIG. 1, to the pressure side 29, which opens into the receptacle 53 of the joint tube 5.
- the upper end of the articulated tube 5 is articulated to the swashplate 3 via a connecting piece 58, which is arranged laterally outside the sliding surface 33 on the underside of the swashplate 3.
- the articulation is realized by a kind of ball joint and has at the upper end of the joint tube 5 on a ball head 59 which is received in a ball socket 61 of the connecting piece 58.
- the joint tube 5 is clamped via the connecting piece 58 against the swash plate 3 out.
- a plate spring package 63 is disposed between the lower end of the joint tube 5 and the bottom of the receptacle 53.
- a fluid passage 67 in the connecting piece 58 continues the fluid connection to the pressure side 29 beyond the tube mouth on the ball head 59 to the swashplate 3.
- FIGS. 3 to 7 illustrate the steps of the method according to the invention for forming a coating 24 on the control plate 23 of the axial piston pump shown in FIG. Fig. 3 shows the shape of a manufactured from a tempering steel as a rotating part blank 81 in the form of a circular cylindrical disc with an annular recess 83 between an uneven peripheral edge 85 and a recessed annular rib 87 at the edge of the central passage 14. As shown in FIG Recess 83 deepens steadily in the radial direction.
- FIGS. 5 and 6 illustrate the further process step in which the pulverulent coating material 4 is introduced into the depression 83.
- a bearing bronze is filled with powdered tin bronze CuSn6 as filling material.
- Fig. 7 illustrates the finished state of the control mirror 23 after the semi-finished product shown in Figs. 5 and 6 is brought by turning into the shape shown in Figs. 2 and 7.
- the bearing region 6 formed from the coating 24 is convexly curved in correspondence with the slightly concave bottom surface 8 of the cylinder drum 1.
- the region 6 of the coating 24 is lapped together with the bottom surface 8 of the cylinder drum 1.
- FIGS. 8 to 10 illustrate the coating of a sliding shoe 31 of the axial piston pump of FIG. 1 according to the coating method according to the invention.
- a steel blank 82 is pre-turned so that a recess 84 is formed in the form of a circumscribed by an uneven peripheral edge 88 circular area, in which the powdery coating material 4, in turn tin bronze, is filled.
- the melting then takes place as described above using the example of the control mirror 23.
- the semi-finished product formed after melting is shown in FIG.
- the sliding block 31 is brought into the final shape shown in FIG.
- the upper side of the sliding shoe 31, which is provided for cooperation with the sliding surface 33 of the axial piston pump is seen, processed so that from the coating 24 storage areas 6 are formed in the form of adjacent circular rings on the peripheral region of the top 95.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Organic Chemistry (AREA)
- Metallurgy (AREA)
- Materials Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Reciprocating Pumps (AREA)
- Details Of Reciprocating Pumps (AREA)
- Pivots And Pivotal Connections (AREA)
- Manufacturing & Machinery (AREA)
Abstract
A method for coating a pump component (23, 31), in particular a part of an axial piston pump (7), said method having the steps of: providing a blank of the component (23, 31); providing at least one recess in the blank; filling a powdery coating material into the associated recess; melting the coating material under a protective gas atmosphere and material-removing processing of the blank to form at least one sliding and/or bearing surface (6) from the coating.
Description
Verfahren zur Beschichtung eines Pumpenbauteils Process for coating a pump component
Die Erfindung betrifft ein Verfahren zur Beschichtung eines Pumpenbauteils, insbesondere eines Teils einer Axialkolbenpumpe. The invention relates to a method for coating a pump component, in particular a part of an axial piston pump.
Pumpen moderner Bauart, wie sie beispielsweise bei Hydrauliksystemen in Form von Axialkolbenpumpen zum Einsatz kommen, enthalten Bauteile mit Oberflächenbereichen, die im Betrieb hoch belastet sind. Um einen sicheren Betrieb über lange Betriebszeiträume sicherzustellen, ist es üblich, betreffende Bauteile zumindest an den hochbelasteten Bereichen mit einer Beschichtung zu versehen, die dem betreffenden Bauteil an den kritischen Stellen die gewünschten Oberflächeneigenschaften verleiht. Insbesondere sollen durch beschichtete Bereiche Gleit- oder Lagerstellen gebildet werden, die verschleißarm und reibungsarm eine Relativbewegung zwischen dem betreffenden Bauteil und einem feststehenden Pumpenbauteil ermöglichen. Pumps of modern design, such as those used in hydraulic systems in the form of axial piston pumps, contain components with surface areas that are heavily loaded during operation. In order to ensure safe operation over long periods of operation, it is customary to provide components in question, at least on the heavily loaded areas, with a coating which gives the component in question the desired surface properties at critical points. In particular, by coated areas sliding or bearing points are to be formed, which allow wear and low friction relative movement between the relevant component and a fixed pump component.
Im Hinblick auf diese Problematik stellt sich die Erfindung die Aufgabe, ein Verfahren aufzuzeigen, das die Ausbildung einer Beschichtung mit besonders vorteilhaften Oberflächeneigenschaften ermöglicht. Erfindungsgemäß ist diese Aufgabe durch ein Verfahren gelöst, das die im Patentanspruch 1 angegebenen Verfahrensschritte umfasst.
Danach sieht die Erfindung für die Beschichtung ein Lötpulververfahren vor, bei dem pulverförmiges Beschichtungsmaterial in eine im Trägermaterial des Rohlings entsprechend ausgeformte Ausnehmung eingefüllt und darin aufgeschmolzen wird. Das Aufschmelzen erfolgt unter einer Schutzgasat- mosphäre und führt zu einer Lötverbindung, so dass die gebildete Schicht untrennbar mit dem Trägermaterial des Rohlings verbunden wird. Zur Ausbildung eines entsprechenden Fertigteils wird der Rohling anschließend materialabtragend endbearbeitet, beispielsweise spanabhebend durch Drehen und/oder Fräsen. In view of this problem, the invention has the object to provide a method that allows the formation of a coating with particularly advantageous surface properties. According to the invention, this object is achieved by a method which comprises the method steps specified in claim 1. Thereafter, the invention provides for the coating, a solder powder method in which powdered coating material is filled in a correspondingly shaped in the carrier material of the blank recess and melted therein. The melting takes place under a protective gas atmosphere and leads to a solder joint, so that the formed layer is inseparably connected to the carrier material of the blank. To form a corresponding finished part of the blank is then finished material removal, for example by machining by turning and / or milling.
Für die Ausbildung einer Beschichtung mit besonderer Eignung für Gleitlagerstellen kann mit besonderem Vorteil eine Beschichtung in Form einer Bronzeschicht gebildet werden, indem pulverförmige Zinnbronze CuSn6 in die jeweilige Ausnehmung eingefüllt wird. For the formation of a coating with particular suitability for plain bearings can be formed with particular advantage a coating in the form of a bronze layer by powdered tin bronze CuSn6 is filled into the respective recess.
Vorzugsweise wird der Rohling aus Stahl vorgedreht, beispielsweise aus einem Kohlenstoffstahl. Preferably, the blank is pre-turned from steel, for example from a carbon steel.
Mit besonderem Vorteil kann das Aufschmelzen ohne Druck in einem Va- kuumofen durchgeführt werden. Dadurch findet der Schmelzprozess ohne Temperaturunterschiede zwischen Stahl und Bronze statt. Fehler, wie sie beim Gießen auftreten, wie Bindungsfehler, Lötrisse und dergleichen, können dadurch ausgeschlossen werden. Durch gezieltes Abkühlen nach dem Aufschmelzen kann ein Vergütungszustand erreicht werden. Vorzugsweise wird hierfür als Werkstoff des Rohlings ein Vergütungsstahl benutzt, wobei sich Vergütungszustände im Bereich von 750 bis 850 N/mm2 realisieren lassen.
Das erfindungsgemäße Verfahren eignet sich in besonderer Weise zur Bildung einer Beschichtung an einem Steuerspiegel und/oder einem Gleitschuh einer Axialkolbenpumpe. In vorteilhafter Weise kann für die Herstellung eines Steuerspiegels einer Axialkolbenpumpe ein Rohling in Form einer Kreisscheibe mit einem zentralen Durchgang hergestellt werden und am Rohling eine Vertiefung in Form eines Ringraums zwischen einem unvertieften Umfangsrand und einem den Durchgang umgebenden Rand in Form einer unvertieften Ringrip- pe gebildet werden. With particular advantage, the melting can be carried out without pressure in a vacuum oven. As a result, the melting process takes place without temperature differences between steel and bronze. Errors that occur during casting, such as binding errors, soldering cracks and the like, can be excluded. By controlled cooling after melting, a tempering state can be achieved. Preferably, a tempering steel is used for this purpose as a material of the blank, wherein tempering states in the range of 750 to 850 N / mm 2 can be realized. The inventive method is particularly suitable for forming a coating on a control mirror and / or a sliding block of an axial piston pump. Advantageously, for the production of a control plate of an axial piston pump, a blank in the form of a circular disk can be produced with a central passage and a recess in the form of an annular space between an unrecipitated peripheral edge and an edge surrounding the passage in the form of an unrecipitated annular rib is formed on the blank become.
Für die Herstellung eines Gleitschuhs einer Axialkolbenpumpe kann ein Rohling in Form eines Kreiszylinderkörpers hergestellt werden, wobei in dessen einer Zylinderfläche eine Vertiefung in Form einer von einem unver- tieften Umfangsrand begrenzten Kreisfläche gebildet wird. For the production of a sliding shoe of an axial piston pump, a blank in the form of a circular cylindrical body can be produced, wherein in the one cylindrical surface of a depression in the form of a bounded by an undentered peripheral edge circular surface is formed.
Nachstehend ist die Erfindung anhand der Zeichnung näher erläutert. The invention is explained in more detail with reference to the drawing.
Es zeigen: Fig. 1 einen Längsschnitt einer Axialkolbenpumpe mit Bauteilen, die eine nach dem erfindungsgemäßen Verfahren hergestellte Beschichtung aufweisen; 1 shows a longitudinal section of an axial piston pump with components which have a coating produced by the process according to the invention;
Fig. 2 eine perspektivische Schrägansicht des Steuerspiegels der Fig. 2 is a perspective oblique view of the control mirror of
Axialkolbenpumpe von Fig. 1 , der mit einer nach dem erfindungsgemäßen Verfahren hergestellten Beschichtung versehen ist; Axial piston pump of Figure 1, which is provided with a coating produced by the process according to the invention.
Fig. 3 eine perspektivische Schrägansicht eines Rohlings, der für die Fig. 3 is a perspective oblique view of a blank, which for the
Herstellung des nach dem erfindungsgemäßen Verfahren beschichteten Steuerspiegels von Fig. 2 vorgefertigt ist;
einen Längsschnitt des Rohlings von Fig. 3; eine perspektivische Schrägansicht des Rohlings von Fig. 3 und 4 mit in dessen gebildete Vertiefung eingefülltem, pulver- förmigen Beschichtungsmaterial; einen Längsschnitt des Rohlings von Fig. 3 und 4 mit in die Vertiefung eingefülltem pulverförmigen Beschichtungsmaterial; einen Längsschnitt des nach Endbearbeitung des Rohlings fertigen Steuerspiegels, der in Fig. 2 in perspektivischer Darstellung gezeigt ist; einen Längsschnitt eines Rohlings zur Herstellung eines nach dem erfindungsgemäßen Verfahren beschichteten Gleitschuhs für die Axialkolbenpumpe von Fig. 1 ; einen Längsschnitt des Rohlings von Fig. 8 mit in die gebildete Vertiefung eingefülltem pulverförmigen Beschichtungsmaterial und einen Längsschnitt des nach Endbearbeiten des Rohlings von Fig. 9 fertiggestellten Gleitschuhs. Preparation of the coated according to the inventive control mirror of Figure 2 is prefabricated. a longitudinal section of the blank of Fig. 3; 3 is an oblique perspective view of the blank of FIGS. 3 and 4 with the pulverulent coating material filled in its formed recess; a longitudinal section of the blank of Figure 3 and 4 with filled in the recess powdery coating material. a longitudinal section of the finished after completion of the blank control mirror, which is shown in Figure 2 in a perspective view. a longitudinal section of a blank for the production of a coated according to the inventive sliding shoe for the axial piston pump of Fig. 1; 8 shows a longitudinal section of the blank of FIG. 8 filled with pulverulent coating material filled into the depression formed and a longitudinal section of the sliding shoe finished after the blank of FIG. 9 has been finished.
Die Fig. 1 zeigt eine Axialkolbenpumpe in Schrägscheibenbauart, die Bauteile aufweist, die eine nach dem erfindungsgemäßen Verfahren hergestellte Beschichtung 24 aufweisen. In der bei Axialkolbenpumpen dieser Art übli-
chen Weise ist in einem Pumpengehäuse 7 eine rotierend antreibbare Zylindertrommel 1 vorgesehen, der eine Schrägscheibe 3 zugeordnet ist, die zur Einstellung der Förderleistung und damit des durch die Pumpe erzeugbaren Systemdrucks schwenkbar ist, wobei die Schwenkachse der Schräg- scheibe 3 in Fig. 1 mit 37 bezeichnet ist. Das Pumpengehäuse 7 weist ein in der Zeichnung oben liegendes Oberteil 9 und ein Unterteil 1 1 auf. Eine Antriebswelle 13 für die Zylindertrommel 1 ist für die Drehbewegung um die mit 15 bezeichnete Achse im Oberteil 9 in einem Kegelrollenlager 16 und im unteren Teil 1 1 mittels eines Gleitlagers 1 7 gelagert. Die Zylinder- räume 19 der Zylindertrommel 1 mit darin geführten Kolben 21 (bei der Schnittebene von Fig. 1 ist lediglich ein Zylinderraum 19 sichtbar) sind am in der Zeichnung unteren Zylinderende mit einem Steuerspiegel 23 in Kontakt, der am Gehäuseunterteil 1 1 anliegt. Der Steuerspiegel 23 weist Steueröffnungen 25 und 26 für Verbindungen zwischen einem saugseitigen An- schluss 29 und einem druckseitigen Anschluss 27 in die Zylinderräume 19 der Zylindertrommel 1 auf. Der Steuerspiegel 23, der in den Fig. 2 und 7 gesondert dargestellt ist, weist auf der in der Zeichnung oben liegenden Seite, die der Zylindertrommel 1 zugewandt ist, eine Beschichtung 24, siehe Fig. 2, auf, die nach dem erfindungsgemäßen Verfahren hergestellt ist und die Lagerfläche bildet, an der die leicht konkav gewölbte Bodenfläche 8 der Zylindertrommel 1 bei deren Drehbewegung gleitet. In Fig. 7 sind Teile der Beschichtung 24, die Lagerstellen zwischen einem zentralen Durchgang 14 und angrenzenden Steueröffnungen 25 und 26 bilden, mit 6 bezeichnet. FIG. 1 shows a swashplate-type axial piston pump which has components which have a coating 24 produced by the method according to the invention. In the case of axial piston pumps of this type, Chen manner, a rotatably driven cylinder drum 1 is provided in a pump housing 7, which is associated with a swash plate 3, which is pivotable for adjusting the delivery capacity and thus the system pressure generated by the pump, wherein the pivot axis of the swash plate 3 in Fig. 1 with 37 is designated. The pump housing 7 has a top part 9 lying in the drawing and a lower part 11. A drive shaft 13 for the cylinder drum 1 is mounted for the rotational movement about the axis designated 15 in the upper part 9 in a tapered roller bearing 16 and in the lower part 1 1 by means of a sliding bearing 1 7. The cylinder spaces 19 of the cylinder drum 1 with piston 21 guided therein (only one cylinder space 19 is visible in the sectional plane of FIG. 1) are in contact with a control mirror 23 on the lower side of the cylinder 1 1. The control plate 23 has control openings 25 and 26 for connections between a suction-side connection 29 and a pressure-side connection 27 into the cylinder chambers 19 of the cylinder drum 1. The control mirror 23, which is shown separately in FIGS. 2 and 7, has a coating 24, see FIG. 2, produced on the method according to the invention on the side lying in the drawing overhead, which faces the cylindrical drum 1 is and forms the bearing surface on which slides the slightly concave bottom surface 8 of the cylinder barrel 1 in its rotational movement. In Fig. 7, parts of the coating 24, the bearing points between a central passage 14 and adjacent control openings 25 and 26 form, denoted by 6.
Bei der Bewegung der Zylindertrommel 1 gleiten die Kolben 21 über jeweils einen Gleitschuh 31 an der Gleitfläche 33, die sich an der Unterseite der Schrägscheibe 3 befindet. In Fig. 10 ist ein Gleitschuh 31 gesondert dargestellt. Die Gleitschuhe 31 sind mit der Kolbenoberseite des zugehöri- gen Kolbens 21 kugelgelenkartig verbunden, wobei das Kugelgelenk durch einen Kugelkopf 34 am Kolben 21 und eine Kugelpfanne 36 im Gleitschuh
31 gebildet ist. Das Kugelgelenk ist durch eine Einbördelung 38 am Gleitschuh 31 gesichert. Ölbohrungen 35 im Kugelkopf 34 und Gleitschuh 31 bilden einen Zugang für Fluid wie Hydrauliköl für die Schmierung der Gleitfläche 33 und eine hydrostatische Entlastung der Gleitschuhe. In Ent- sprechung zu dem Steuerspiegel 23 weisen auch die Gleitschuhe 31 eine nach dem erfindungsgemäßen Verfahren hergestellte Beschichtung 24 auf. During the movement of the cylindrical drum 1, the pistons 21 slide via a respective sliding shoe 31 on the sliding surface 33, which is located on the underside of the swash plate 3. In Fig. 10, a shoe 31 is shown separately. The sliding blocks 31 are connected to the piston top side of the associated piston 21 in a ball joint-like manner, the ball joint being formed by a ball head 34 on the piston 21 and a ball socket 36 in the sliding block 31 is formed. The ball joint is secured by a flanging 38 on the shoe 31. Oil holes 35 in the ball head 34 and shoe 31 form an access for fluid such as hydraulic oil for lubrication of the sliding surface 33 and a hydrostatic discharge of the shoes. In a manner corresponding to the control mirror 23, the sliding shoes 31 also have a coating 24 produced by the method according to the invention.
Wie bereits erwähnt, ist für die Einstellung des Fördervolumens die Schrägscheibe 3 um die Schwenkachse 37 verstellbar, die in der Ebene der Gleit- fläche 33 der Schrägscheibe 3 liegt. Definiert ist diese Schwenkachse 37 durch die zwischen Schrägscheibe 3 und Oberteil 9 gebildete Schrägscheibenlagerung. Diese weist am Oberteil 9 eine Kunststofflagerschale 39 auf, an der die Schrägscheibe 3 mit einer kalottenförmigen Gleitfläche 41 geführt ist. In der Gleitfläche 41 ist für den Durchtritt der Antriebswelle 13 eine sich nach oben konisch erweiternde Durchgangsöffnung 43 in der Schrägscheibe 3 gebildet. Beidseits neben der Öffnung 43 sind aus der Gleitfläche 41 vorstehende Führungsschienen 45 als Teil der Schrägscheibenlagerung vorgesehen. Für die Schwenkbewegung der Schrägscheibe 3 um die As already mentioned, the swash plate 3 is adjustable about the pivot axis 37, which lies in the plane of the sliding surface 33 of the swash plate 3 for adjusting the delivery volume. This pivot axis 37 is defined by the swash plate bearing formed between swash plate 3 and upper part 9. This has on the upper part 9, a plastic bearing shell 39, on which the swash plate 3 is guided with a dome-shaped sliding surface 41. In the sliding surface 41, an upwardly conically widening passage opening 43 in the swash plate 3 is formed for the passage of the drive shaft 13. On both sides of the opening 43 are provided from the sliding surface 41 projecting guide rails 45 as part of the swash plate bearing. For the pivoting movement of the swash plate 3 to the
Schwenkachse 37 ist die in Fig. 1 links gelegene Seite der Schrägscheibe 3 mit einem Schwenkhebel 47 verschraubt, der sich parallel zur Achse 15 neben der Zylindertrommel 1 erstreckt und an seinem in Fig. 1 unteren Ende 49 in senkrecht zur Zeichnungsebene verlaufender Richtung bewegbar ist, um eine entsprechende Schwenkbewegung der Schrägscheibe 3 um die Schwenkachse 37 zu bewirken. Der Schwenkhebel 47 ist an der zugeord- neten Seite der Schrägscheibe 3 mit einem in einer Bohrung 51 befindlichen Innengewinde verschraubt. Pivot axis 37 is the left in Fig. 1 side of the swash plate 3 screwed to a pivot lever 47 which extends parallel to the axis 15 adjacent to the cylinder drum 1 and is movable at its in Fig. 1 lower end 49 in perpendicular to the plane extending direction, to cause a corresponding pivoting movement of the swash plate 3 about the pivot axis 37. The pivoting lever 47 is screwed to the associated side of the swashplate 3 with an internal thread located in a bore 51.
Ein Gelenkrohr 5, das Bestandteil einer Zufuhr- und Andrückeinrichtung bildet, ist, wie Fig. 1 zeigt, seitlich neben der Zylindertrommel 1 in parallel zur Achse 15 verlaufender Richtung angeordnet. Mit seinem in Fig. 1 unteren Ende ist das Gelenkrohr 5 in einer Aufnahme 53 in einem Anschluss-
block 55 am Gehäuseunterteil 1 1 gelagert, wobei die Aufnahme 53 eine Axialverschiebung des Gelenkrohres 5 ermöglicht. Der Block 55 enthält einen in Fig. 1 nicht sichtbaren Verbindungskanal zur Druckseite 29, der in die Aufnahme 53 des Gelenkrohres 5 einmündet. Das obere Ende des Ge- lenkrohres 5 ist über ein Verbindungsstück 58, das seitlich außerhalb der Gleitfläche 33 an der Unterseite der Schrägscheibe 3 angeordnet ist, mit der Schrägscheibe 3 gelenkig verbunden. Die Gelenkverbindung ist durch eine Art Kugelgelenk realisiert und weist am oberen Ende des Gelenkrohres 5 einen Kugelkopf 59 auf, der in einer Kugelpfanne 61 des Verbindungs- Stückes 58 aufgenommen ist. Das Gelenkrohr 5 ist über das Verbindungsstück 58 gegen die Schrägscheibe 3 hin verspannt. Zu diesem Zweck ist zwischen dem unteren Ende des Gelenkrohres 5 und dem Boden der Aufnahme 53 ein Tellerfederpaket 63 angeordnet. Ein Fluiddurchgang 67 im Verbindungsstück 58 setzt die Fluidverbindung zur Druckseite 29 über die Rohrmündung am Kugelkopf 59 hinaus zur Schrägscheibe 3 fort. An den Durchgang 67 des Verbindungsstückes 58 schließen sich innerhalb der Schrägscheibe 3 ausgebildete Schmierkanäle 73, 75 an, von denen in Fig. 1 lediglich einige sichtbar sind und von denen die vertikalen Kanäle 75 an für die Schmierstoffzufuhr zur Schwenkscheibenlagerung in Frage kommenden Stellen der Gleitfläche 41 münden. A joint tube 5, which forms part of a supply and pressing device is, as shown in FIG. 1, arranged laterally next to the cylinder drum 1 in parallel to the axis 15 extending direction. With its in Fig. 1 lower end of the joint tube 5 in a receptacle 53 in a connection Block 55 mounted on the lower housing part 1 1, wherein the receptacle 53 allows axial displacement of the joint tube 5. The block 55 includes a connection channel, not visible in FIG. 1, to the pressure side 29, which opens into the receptacle 53 of the joint tube 5. The upper end of the articulated tube 5 is articulated to the swashplate 3 via a connecting piece 58, which is arranged laterally outside the sliding surface 33 on the underside of the swashplate 3. The articulation is realized by a kind of ball joint and has at the upper end of the joint tube 5 on a ball head 59 which is received in a ball socket 61 of the connecting piece 58. The joint tube 5 is clamped via the connecting piece 58 against the swash plate 3 out. For this purpose, a plate spring package 63 is disposed between the lower end of the joint tube 5 and the bottom of the receptacle 53. A fluid passage 67 in the connecting piece 58 continues the fluid connection to the pressure side 29 beyond the tube mouth on the ball head 59 to the swashplate 3. To the passage 67 of the connecting piece 58 close within the swash plate 3 trained lubrication channels 73, 75, of which in Fig. 1, only some are visible and of which the vertical channels 75 at for the supply of lubricant to the swivel disk bearing in question points of the sliding surface 41st lead.
Die Fig. 3 bis 7 verdeutlichen die Schritte des erfindungsgemäßen Verfahrens zur Bildung einer Beschichtung 24 am Steuerspiegel 23 der in Fig. 1 dargestellten Axialkolbenpumpe. Die Fig. 3 zeigt die Form eines aus einem Vergütungsstahl als Drehteil hergestellten Rohlings 81 in Form einer Kreiszylinderscheibe mit einer kreisringförmigen Vertiefung 83 zwischen einem unvertieften Umfangsrand 85 und einer unvertieften Ringrippe 87 am Rand des zentralen Durchgangs 14. Wie Fig. 4 zeigt, ist die Vertiefung 83 in Radialrichtung stetig vertieft. Fig. 5 und 6 verdeutlichen den weiteren Verfah- rensschritt, bei dem in die Vertiefung 83 das pulverförmig Beschichtungs- material 4 eingefüllt wird. Für die Bildung der Beschichtung 24 in Form
einer Lagerbronze wird als Füllmaterial pulverförmige Zinnbronze CuSn6 eingefüllt. Sodann wird das Beschichtungsmaterial 4 unter einer Schutzgasatmosphäre ohne Druck in einem Vakuumofen aufgeschmolzen. Durch die entstehende Lötverbindung wird die Bronzeschicht untrennbar mit dem Trägerteil verbunden. Durch gezieltes Abkühlen nach dem Lötprozess kann ein bestimmter Vergütungszustand erreicht werden. Die Fig. 7 verdeutlicht den Fertigzustand des Steuerspiegels 23, nachdem das in Fig. 5 und 6 gezeigte Halbfertigprodukt durch Drehen in die in Fig. 2 und 7 gezeigte Form gebracht wird. Wie ersichtlich, sind dabei zwischen dem zentralen Durch- gang 14 und der saugseitigen Steueröffnung 25 sowie den druckseitigen Steueröffnungen 26 sowie zwischen einem flanschartigen Umfangsbereich 89 und den Steueröffnungen 25, 26 jeweils aus der Beschichtung 24 Gleitlagerbereiche gebildet, wie sie in Fig. 7 mit 6 bezeichnet sind. Der aus der Beschichtung 24 gebildete Lagerbereich 6 ist in Entsprechung zu der leicht konkav gewölbten Bodenfläche 8 der Zylindertrommel 1 konvex gewölbt. Der Bereich 6 der Beschichtung 24 ist zusammen mit der Bodenfläche 8 der Zylindertrommel 1 geläppt. FIGS. 3 to 7 illustrate the steps of the method according to the invention for forming a coating 24 on the control plate 23 of the axial piston pump shown in FIG. Fig. 3 shows the shape of a manufactured from a tempering steel as a rotating part blank 81 in the form of a circular cylindrical disc with an annular recess 83 between an uneven peripheral edge 85 and a recessed annular rib 87 at the edge of the central passage 14. As shown in FIG Recess 83 deepens steadily in the radial direction. FIGS. 5 and 6 illustrate the further process step in which the pulverulent coating material 4 is introduced into the depression 83. For the formation of the coating 24 in the form A bearing bronze is filled with powdered tin bronze CuSn6 as filling material. Then, the coating material 4 is melted under a protective gas atmosphere without pressure in a vacuum oven. By the resulting solder joint, the bronze layer is inseparably connected to the support member. By selective cooling after the soldering process, a certain tempering state can be achieved. Fig. 7 illustrates the finished state of the control mirror 23 after the semi-finished product shown in Figs. 5 and 6 is brought by turning into the shape shown in Figs. 2 and 7. As can be seen, between the central passage 14 and the suction-side control opening 25 and the pressure-side control openings 26 and between a flange-like peripheral region 89 and the control openings 25, 26 each of the coating 24 Gleitlagerbereiche formed, as shown in FIG are designated. The bearing region 6 formed from the coating 24 is convexly curved in correspondence with the slightly concave bottom surface 8 of the cylinder drum 1. The region 6 of the coating 24 is lapped together with the bottom surface 8 of the cylinder drum 1.
Die Fig. 8 bis 10 verdeutlichen die Beschichtung eines Gleitschuhs 31 der Axialkolbenpumpe von Fig. 1 nach dem erfindungsgemäßen Beschich- tungsverfahren. Wiederum wird ein Stahlrohling 82 derart vorgedreht, dass eine Vertiefung 84 in Form einer von einem unvertieften Umfangsrand 88 umgrenzten Kreisfläche gebildet wird, in die das pulverförmige Beschichtungsmaterial 4, wiederum Zinnbronze, eingefüllt wird. Das Aufschmelzen erfolgt sodann wie zuvor am Beispiel des Steuerspiegels 23 beschrieben. Das nach dem Aufschmelzen gebildete Halbfertigprodukt ist in Fig. 9 dargestellt. Durch anschließende Endbearbeitung durch Drehen und Fräsen (einige Bearbeitungslinien sind in Fig. 9 mit gestrichelten Linien 91 und 93 angedeutet), wird der Gleitschuh 31 in die in Fig. 10 gezeigte Endform ge- bracht. Wie hieraus ersichtlich, ist die Oberseite des Gleitschuhs 31 , die für die Zusammenwirkung mit der Gleitfläche 33 der Axialkolbenpumpe vor-
gesehen ist, derart bearbeitet, dass aus der Beschichtung 24 Lagerbereiche 6 in Form nebeneinanderliegender Kreisringe am Umfangsbereich der Oberseite 95 gebildet sind.
FIGS. 8 to 10 illustrate the coating of a sliding shoe 31 of the axial piston pump of FIG. 1 according to the coating method according to the invention. Again, a steel blank 82 is pre-turned so that a recess 84 is formed in the form of a circumscribed by an uneven peripheral edge 88 circular area, in which the powdery coating material 4, in turn tin bronze, is filled. The melting then takes place as described above using the example of the control mirror 23. The semi-finished product formed after melting is shown in FIG. By subsequent finishing by turning and milling (some processing lines are indicated in FIG. 9 with dashed lines 91 and 93), the sliding block 31 is brought into the final shape shown in FIG. As can be seen, the upper side of the sliding shoe 31, which is provided for cooperation with the sliding surface 33 of the axial piston pump is seen, processed so that from the coating 24 storage areas 6 are formed in the form of adjacent circular rings on the peripheral region of the top 95.
Claims
P a t e n t a n s p r ü c h e P a n t a n s p r e c h e
Verfahren zur Beschichtung (24) eines Pumpenbauteils (23, 31 ), insbesondere eines Teils einer Axialkolbenpumpe (7), mit den Schritten: Process for coating (24) a pump component (23, 31), in particular a part of an axial piston pump (7), with the steps:
Bereitstellen eines Rohlings (81 , 82) des Bauteils (23, 31 ); Providing a blank (81, 82) of the component (23, 31);
Vorsehen mindestens einer Ausnehmung (83, 84) im Rohling (81 , Providing at least one recess (83, 84) in the blank (81, 81)
82); 82);
Einfüllen eines pulverförmigen Beschichtungsmaterials (4) in die jeweils zugeordnete Ausnehmung (83, 84); Filling a powdered coating material (4) in the respective associated recess (83, 84);
Aufschmelzen des Beschichtungsmaterials (4) unter einer Schutzgasatmosphäre und Melting of the coating material (4) under a protective gas atmosphere and
materialabtragendes Bearbeiten des Rohlings (81 , 82) unter Bildung mindestens einer Gleit- und/oder Lagerfläche (6) aus der Beschichtung (24). material-removing machining of the blank (81, 82) to form at least one sliding and / or bearing surface (6) from the coating (24).
Verfahren nach Anspruch 1 , dadurch gekennzeichnet, dass zur Bildung einer Beschichtung in Form einer Bronzeschicht (24) pulver- förmige Zinnbronze (CuSn6) in die jeweilige Ausnehmung (83, 84) eingefüllt wird. A method according to claim 1, characterized in that to form a coating in the form of a bronze layer (24) powdered tin bronze (CuSn6) in the respective recess (83, 84) is filled.
Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass der Rohling (81 , 82) aus Stahl hergestellt wird. A method according to claim 1 or 2, characterized in that the blank (81, 82) is made of steel.
Verfahren nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass das Aufschmelzen ohne Druck in einem Vakuumofen durchgeführt wird. Method according to one of the preceding claims, characterized in that the melting is carried out without pressure in a vacuum oven.
Verfahren nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass der Rohling (81 , 82) durch das Aufschmelzen in einen Vergütungszustand gebracht wird.
Method according to one of the preceding claims, characterized in that the blank (81, 82) is brought by the melting in a tempering state.
6. Verfahren nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass der Rohling (81 , 82) aus einem Vergütungsstahl gebildet wird. 6. The method according to any one of the preceding claims, characterized in that the blank (81, 82) is formed from a tempering steel.
7. Verfahren nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass die Beschichtung (24) an einem Steuerspiegel (23) und/oder einem Gleitschuh (31 ) als die Pumpenbauteile einer Axialkolbenpumpe (7) gebildet wird. 7. The method according to any one of the preceding claims, characterized in that the coating (24) on a control mirror (23) and / or a sliding block (31) as the pump components of an axial piston pump (7) is formed.
8. Verfahren nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass zur Bildung des Steuerspiegels (23) der Axialkolbenpumpe (7) ein Rohling (81 ) in Form einer Kreisscheibe mit einem zentralen Durchgang (14) hergestellt wird und dass am Rohling (81 ) eine Vertiefung (83) in Form eines Ringraums zwischen einem un- vertieften Umfangsrand (85) und einem den Durchgang (14) umgebenden Rand in Form einer unvertieften Ringrippe (87) gebildet wird. 8. The method according to any one of the preceding claims, characterized in that for forming the control plate (23) of the axial piston pump (7), a blank (81) in the form of a circular disc with a central passage (14) is produced and that on the blank (81) a recess (83) in the form of an annular space is formed between an unrecessed peripheral edge (85) and an edge surrounding the passage (14) in the form of an unrecipitated annular rib (87).
9. Verfahren nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass für die Herstellung des Gleitschuhs (31 ) der Axialkolbenpumpe (7) ein Rohling (82) in Form eines Kreiszylinderkörpers hergestellt wird und dass in dessen einer Zylinderfläche eine Vertiefung (84) in Form einer von einem unvertieften Umfangsrand (88) begrenzen Kreisfläche gebildet wird.
9. The method according to any one of the preceding claims, characterized in that for the production of the sliding block (31) of the axial piston pump (7), a blank (82) is produced in the form of a circular cylindrical body and in that a cylindrical surface of a recess (84) in the form one of an uneven peripheral edge (88) defining the circular area is formed.
Applications Claiming Priority (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102013008681.7A DE102013008681A1 (en) | 2013-05-22 | 2013-05-22 | Axial piston pump in swashplate design |
DE102013008677.9A DE102013008677A1 (en) | 2013-05-22 | 2013-05-22 | Hydraulic pump and piston for such a hydraulic pump |
DE102013008676.0A DE102013008676A1 (en) | 2013-05-22 | 2013-05-22 | axial piston pump |
DE102013008678.7A DE102013008678A1 (en) | 2013-05-22 | 2013-05-22 | Process for coating a pump component |
DE102013008629.9A DE102013008629A1 (en) | 2013-05-22 | 2013-05-22 | joint arrangements |
DE102013008679.5A DE102013008679A1 (en) | 2013-05-22 | 2013-05-22 | axial piston pump |
PCT/EP2014/001166 WO2014187531A1 (en) | 2013-05-22 | 2014-04-30 | Method for coating a pump component |
Publications (1)
Publication Number | Publication Date |
---|---|
EP2999808A1 true EP2999808A1 (en) | 2016-03-30 |
Family
ID=50732101
Family Applications (5)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP14710498.8A Active EP2999885B1 (en) | 2013-05-22 | 2014-03-12 | Axial piston machine of swash plate type |
EP14722109.7A Withdrawn EP2999808A1 (en) | 2013-05-22 | 2014-04-30 | Method for coating a pump component |
EP14724320.8A Active EP2999884B1 (en) | 2013-05-22 | 2014-05-15 | Axial piston pump |
EP14724319.0A Not-in-force EP2999882B1 (en) | 2013-05-22 | 2014-05-15 | Axial piston pump |
EP14724649.0A Not-in-force EP2999883B1 (en) | 2013-05-22 | 2014-05-16 | Hydraulic pump and piston for such an hydraulic pump |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP14710498.8A Active EP2999885B1 (en) | 2013-05-22 | 2014-03-12 | Axial piston machine of swash plate type |
Family Applications After (3)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP14724320.8A Active EP2999884B1 (en) | 2013-05-22 | 2014-05-15 | Axial piston pump |
EP14724319.0A Not-in-force EP2999882B1 (en) | 2013-05-22 | 2014-05-15 | Axial piston pump |
EP14724649.0A Not-in-force EP2999883B1 (en) | 2013-05-22 | 2014-05-16 | Hydraulic pump and piston for such an hydraulic pump |
Country Status (7)
Country | Link |
---|---|
US (5) | US9664184B2 (en) |
EP (5) | EP2999885B1 (en) |
JP (5) | JP6426717B2 (en) |
CN (5) | CN105339657B (en) |
AU (6) | AU2014270792B2 (en) |
CA (5) | CA2913062C (en) |
WO (6) | WO2014187512A1 (en) |
Families Citing this family (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10947963B2 (en) * | 2016-06-06 | 2021-03-16 | Parker-Hannifin Corporation | Hydraulic pump with inlet baffle |
CN108150405A (en) * | 2016-12-05 | 2018-06-12 | 江苏汉力士液压制造有限公司 | Hollow plunger |
DE102017108186A1 (en) * | 2017-04-18 | 2018-10-18 | Gardner Denver Deutschland Gmbh | Mixing valve arrangement for a hydraulic system, as well as oil cooling system and compressor system with this |
CN108855807B (en) * | 2017-05-12 | 2023-10-27 | 江苏远华轻化装备有限公司 | Automatic heating cover of upset |
CN108547765B (en) * | 2018-04-08 | 2019-11-26 | 杭州绿聚科技有限公司 | A kind of novel axial plunger pump |
DE102018205884A1 (en) * | 2018-04-18 | 2019-10-24 | Robert Bosch Gmbh | Axial piston machine with pressure relief in the Durchtriebsraum |
DE102018003207A1 (en) | 2018-04-19 | 2019-10-24 | Hydac Drive Center Gmbh | Axial piston pump in swashplate design |
DE102018212419A1 (en) * | 2018-07-25 | 2020-01-30 | Danfoss Power Solutions Gmbh & Co. Ohg | TORQUE CONTROL AND RETURN DEVICE |
US11644020B2 (en) | 2019-07-29 | 2023-05-09 | Diversey, Inc. | Fluid dosing system |
CN111237151A (en) * | 2020-03-21 | 2020-06-05 | 哈尔滨工程大学 | Axial plunger pump sliding shoe with surface texture |
RU2755015C1 (en) * | 2020-08-11 | 2021-09-09 | Публичное акционерное общество "Авиационная корпорация "Рубин" | Piston of axial piston hydraulic machine |
CN113700624A (en) * | 2021-07-16 | 2021-11-26 | 北京中金泰达电液科技有限公司 | High-pressure high-speed axial plunger pump |
DE102022200140A1 (en) | 2022-01-10 | 2023-07-13 | Robert Bosch Gesellschaft mit beschränkter Haftung | Axial piston machine with at least partially machined pre-compression chambers |
DE102022202520A1 (en) | 2022-03-15 | 2023-09-21 | Robert Bosch Gesellschaft mit beschränkter Haftung | Separate pre-compression assembly for use with a piston engine |
Family Cites Families (114)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2638850A (en) * | 1952-01-24 | 1953-05-19 | Ferris Walter | Piston assembly for axial type hydrodynamic machines |
US2825241A (en) | 1952-12-31 | 1958-03-04 | Oilgear Co | Piston and piston rod assemblies |
US2858771A (en) * | 1955-10-27 | 1958-11-04 | Richard T Cornelius | Cooling system for hydraulic pumps |
US2972962A (en) * | 1956-07-16 | 1961-02-28 | Oilgear Co | Hydraulic thrust bearing |
DE1211943B (en) * | 1957-01-18 | 1966-03-03 | Bosch Gmbh Robert | Device for noise reduction in a rotary valve-controlled hydraulic axial or radial piston machine that can be used as a pump or motor |
US2925046A (en) | 1957-05-02 | 1960-02-16 | New York Air Brake Co | Engine |
US2915985A (en) * | 1957-06-20 | 1959-12-08 | New York Air Brake Co | Pump |
US3063381A (en) * | 1958-09-24 | 1962-11-13 | New York Air Brake Co | Engine |
US3093081A (en) * | 1959-01-29 | 1963-06-11 | New York Air Brake Co | Pumping device |
US3192868A (en) * | 1961-08-22 | 1965-07-06 | Gunnar A Wahlmark | Drive connection for fluid device |
GB1007129A (en) * | 1962-04-06 | 1965-10-13 | Dowty Hydraulic Units Ltd | Hydraulic reciprocating pumps and motors |
US3208397A (en) * | 1963-06-19 | 1965-09-28 | Lehrer Alexander | Quiet hydraulic pump |
US3396670A (en) * | 1966-10-10 | 1968-08-13 | Sundstrand Corp | Hydraulic pump or motor |
DE2307641A1 (en) * | 1973-02-16 | 1974-08-22 | Bosch Gmbh Robert | BALL JOINT |
GB1414037A (en) * | 1973-12-20 | 1975-11-12 | Sundstrand Corp | Light weight pistons |
US4028010A (en) | 1974-06-21 | 1977-06-07 | Caterpillar Tractor Co. | Reversible, variable-displacement piston pump with positioner means for automatic return to zero displacement |
US3956969A (en) * | 1974-12-09 | 1976-05-18 | Caterpillar Tractor Co. | Hydrostatic pump including separate noise reducing valve assemblies for its inlet and outlet pressure ports |
DE2521312B1 (en) * | 1975-05-13 | 1976-07-22 | Hydromatik Gmbh | INCLINED DISC PIVOT BEARING FOR A HYDRAULIC AXIAL PISTON MACHINE |
DE7515346U (en) * | 1975-05-13 | 1978-12-07 | Hydromatik Gmbh, 7900 Ulm | INCLINED DISC PIVOT BEARING FOR A HYDRAULIC AXIAL PISTON MACHINE |
DE2531616A1 (en) * | 1975-07-15 | 1977-02-03 | Linde Ag | AXIAL PISTON MACHINE WITH A INCLINED DISC ON AN ADJUSTABLE CRADLE |
DE2653868A1 (en) * | 1976-11-26 | 1978-06-01 | Linde Ag | HOLLOW PISTON FOR A HYDROSTATIC PISTON MACHINE AND METHOD FOR THE PRODUCTION THEREOF |
DE2653867A1 (en) | 1976-11-26 | 1978-06-01 | Linde Ag | Hollow piston for hydraulic axial piston unit - has integral ball head with mantle press fitted and soldered to cover with central column |
JPS5443302A (en) | 1977-09-12 | 1979-04-05 | Daikin Ind Ltd | Fluid rotation machine |
DE2829597A1 (en) | 1978-07-05 | 1980-01-24 | Schwaebische Huettenwerke Gmbh | Metal workpiece with soldered joint - made using porous sintered metal disk entered by molten solder or brazing alloy to make very strong joints |
DE3135605A1 (en) * | 1981-09-09 | 1983-03-17 | Linde Ag, 6200 Wiesbaden | ADJUSTABLE WASHING DISC AXIAL PISTON MACHINE WITH SLIDING BEARING WEIGHING BODY |
JPS5868367A (en) * | 1981-10-19 | 1983-04-23 | Sharp Corp | Picture recording device |
US4455920A (en) * | 1982-06-01 | 1984-06-26 | Abex Corporation | Rocker cam control |
DE3239175C1 (en) * | 1982-10-22 | 1984-03-01 | Hydromatik GmbH, 7915 Elchingen | BEARING OF THE DRIVE FLANGE OF AN AXIAL PISTON MACHINE IN SCHRAEGACHSEN DESIGN. |
JPS5990781A (en) * | 1982-11-16 | 1984-05-25 | Hitachi Constr Mach Co Ltd | Axial piston type rotary machine employing fluid pressure |
DE3413059C1 (en) * | 1984-04-06 | 1985-07-11 | Hydromatik GmbH, 7915 Elchingen | Axial piston machine, in particular pump of the swashplate or bevel axis type |
US4584926A (en) * | 1984-12-11 | 1986-04-29 | Sundstrand Corporation | Swashplate leveling and holddown device |
DE3504789A1 (en) * | 1985-02-13 | 1986-08-14 | Webasto-Werk W. Baier GmbH & Co, 8035 Gauting | ELECTROMAGNETICALLY ACTUATED PISTON PUMP |
JPS62118990A (en) | 1985-11-18 | 1987-05-30 | Daido Metal Kogyo Kk | Production of composite material for sliding member |
DE3545137A1 (en) | 1985-12-19 | 1987-07-02 | Oerlikon Boehringer Gmbh | PISTON FOR AXIAL PISTON MACHINE |
DE3602651C2 (en) | 1986-01-29 | 1995-03-30 | Linde Ag | Hollow piston for an axial piston machine and method for its production |
KR900003793B1 (en) * | 1986-08-25 | 1990-05-31 | 가부시키가이샤 히타치세이사쿠쇼 | Thrust hydrostatic bearing device for use in axial piston machine |
JPH02466U (en) * | 1987-11-09 | 1990-01-05 | ||
DE3743125A1 (en) | 1987-12-18 | 1989-07-06 | Brueninghaus Hydraulik Gmbh | AXIAL PISTON PUMP |
US4896583A (en) * | 1988-02-19 | 1990-01-30 | Racine Fluid Power Inc. | Saddle bearing support for axial piston pumps and motors |
JP2577974B2 (en) * | 1988-10-03 | 1997-02-05 | 日立建機株式会社 | Variable capacity oblique axis hydraulic machine |
JPH0347482A (en) * | 1989-07-15 | 1991-02-28 | Hitachi Constr Mach Co Ltd | Slant shaft type liquid pressure machine with variable capacity |
US5114261A (en) | 1989-07-31 | 1992-05-19 | Honda Giken Kogyo Kabushiki Kaisha | Swashplate type hydraulic device having a ball joint connection |
JPH03100375A (en) | 1989-09-11 | 1991-04-25 | Toyooki Kogyo Co Ltd | Oil hydraulic pump |
DE3942189C1 (en) * | 1989-12-20 | 1991-09-05 | Hydromatik Gmbh, 7915 Elchingen, De | |
JP2534083Y2 (en) * | 1991-04-25 | 1997-04-30 | 株式会社豊田自動織機製作所 | Variable displacement piston pump |
US5265331A (en) | 1992-01-16 | 1993-11-30 | Caterpillar Inc. | Method of manufacturing a piston for an axial piston fluid translating device |
DE4202631C2 (en) * | 1992-01-30 | 1995-07-06 | Hydromatik Gmbh | Axial piston machine, in particular hydraulic pump of the swash plate type or of the inclined axis type, the throughput volume of which can be adjusted by an adjusting device |
DE4214765A1 (en) | 1992-05-04 | 1993-11-11 | Sachsenhydraulik Gmbh | Piston-slipper connection for axial piston swashplate pump - uses ball with flattened surfaces attached to neck of slipper |
JP2606758Y2 (en) * | 1992-12-22 | 2001-01-09 | 株式会社小松製作所 | Hydraulic pump / motor cylinder chamber pressure control device |
GB2274491B (en) | 1993-01-21 | 1996-09-04 | Hamworthy Hydraulics Ltd | Axial piston pump |
US5390584A (en) * | 1993-10-25 | 1995-02-21 | Caterpillar Inc. | Follow up mechanism for a swashplate bearing |
DE4415510C1 (en) | 1994-05-03 | 1995-07-27 | Hydromobil Hydraulik Handelsge | Axial piston pump of vehicle |
DE4429053C1 (en) * | 1994-08-16 | 1995-11-02 | Brueninghaus Hydromatik Gmbh | Ball head to support piston of hydrostatic piston machine on lifting body |
US5642654A (en) | 1994-09-01 | 1997-07-01 | Sundstrand Corporation | Piston and method of manufacturing the same |
JPH08144941A (en) | 1994-11-21 | 1996-06-04 | Uchida Yuatsu Kiki Kogyo Kk | Pulsation reduction device for cam plate type axial piston pump |
JP3362576B2 (en) * | 1995-02-10 | 2003-01-07 | ダイキン工業株式会社 | Variable displacement piston machine |
JPH08284805A (en) | 1995-04-17 | 1996-10-29 | Hitachi Constr Mach Co Ltd | Axial piston type hydraulic rotary machine |
DE19527647A1 (en) * | 1995-07-28 | 1997-01-30 | Linde Ag | Axial piston machine |
DE19620167C2 (en) | 1996-05-20 | 1998-11-12 | Brueninghaus Hydromatik Gmbh | Hollow piston with radially welded cover |
US5673606A (en) * | 1996-08-22 | 1997-10-07 | Caterpillar Inc. | Swash plate actuating device for axial piston pumps and motors |
JP3782529B2 (en) * | 1996-11-15 | 2006-06-07 | 東芝機械株式会社 | Swash plate type variable displacement piston pump |
DE19649195C1 (en) * | 1996-11-27 | 1998-01-08 | Brueninghaus Hydromatik Gmbh | Axial piston machine with swivelling cylinder drum |
DE19706116C5 (en) * | 1997-02-17 | 2012-12-20 | Linde Material Handling Gmbh | Device for pulsation reduction on hydrostatic displacement units |
DE19706114C9 (en) | 1997-02-17 | 2014-02-06 | Linde Hydraulics Gmbh & Co. Kg | Device for pulsation reduction on a hydrostatic displacement unit |
JP4035193B2 (en) * | 1997-02-26 | 2008-01-16 | 株式会社日立製作所 | Axial piston machine |
DE19755386C2 (en) * | 1997-12-12 | 1999-10-21 | Brueninghaus Hydromatik Gmbh | Hydrostatic machine with a rotatably mounted cylinder drum and an adjustable swivel disc |
JP3776585B2 (en) * | 1998-03-09 | 2006-05-17 | カヤバ工業株式会社 | Axial piston pump or motor |
JP3154329B2 (en) * | 1998-07-21 | 2001-04-09 | 川崎重工業株式会社 | Axial piston pump |
FR2785525B1 (en) | 1998-11-10 | 2001-01-19 | Rech S Et De Fabrication S E R | SPHERICAL HEAD OF A FEMALE HIP PROSTHESIS, INTENDED TO BE ENGAGED IN A CUP OF SYNTHETIC MATERIAL |
EP1013928A3 (en) | 1998-12-22 | 2000-11-08 | Parker Hannifin GmbH | Swash plate axial piston pump with pulsation damping means |
DE19934216A1 (en) * | 1999-07-21 | 2001-02-01 | Brueninghaus Hydromatik Gmbh | Hollow piston for a piston machine and method for producing a hollow piston |
EP1143143A3 (en) * | 2000-04-03 | 2002-11-13 | Kabushiki Kaisha Toyota Jidoshokki | Compressor piston and process for producing the compressor piston |
US6274083B1 (en) * | 2000-06-14 | 2001-08-14 | Sauer-Danfoss Inc. | Method of producing a hollow piston for a hydrostatic power unit |
AU2001270036A1 (en) * | 2000-06-20 | 2002-01-02 | Folsom Technologies, Inc. | Hydraulic pump and motor |
US6314864B1 (en) * | 2000-07-20 | 2001-11-13 | Sauer-Danfoss Inc. | Closed cavity piston for hydrostatic units |
DE10044784B4 (en) * | 2000-09-11 | 2006-03-23 | Sauer-Danfoss (Neumünster) GmbH & Co OHG | Schrägachsenverstelleinheit |
US6454885B1 (en) | 2000-12-15 | 2002-09-24 | Rolls-Royce Corporation | Nickel diffusion braze alloy and method for repair of superalloys |
US6568916B2 (en) | 2001-06-07 | 2003-05-27 | Caterpillar Inc. | Axial piston pump with outer diameter inlet filling |
US20030047066A1 (en) | 2001-09-12 | 2003-03-13 | Damtew Fikreadam A. | Axial piston pump with rocker cam counterbalance feed |
JP2004044467A (en) * | 2002-07-11 | 2004-02-12 | Uchida Hydraulics Co Ltd | Swash plate type hydraulic pump |
DE10235813B4 (en) | 2002-08-05 | 2004-07-22 | Brueninghaus Hydromatik Gmbh | Sliding shoe and method for producing raised contact surfaces of a sliding shoe |
US7255933B2 (en) * | 2002-08-23 | 2007-08-14 | Senju Metal Industry Co., Ltd. | Multi-layer sliding part and a method for its manufacture |
US6893228B2 (en) | 2002-11-22 | 2005-05-17 | Caterpillar Inc | Axial piston pump with fluid bearing arrangement |
DE10305136A1 (en) * | 2003-02-07 | 2004-08-26 | Brueninghaus Hydromatik Gmbh | Hollow piston for a piston machine and method for producing a hollow piston |
DE10341791B4 (en) * | 2003-09-10 | 2005-09-29 | Brueninghaus Hydromatik Gmbh | Hollow piston for a piston engine and method for producing a hollow piston |
US20050226737A1 (en) | 2004-04-07 | 2005-10-13 | Sauer-Danfoss, Inc. | Axial piston hydraulic power unit with pseudo slippers |
US6994014B2 (en) * | 2004-06-29 | 2006-02-07 | Sauer-Danfoss Inc. | Closed cavity piston for hydrostatic power units and method of manufacturing the same |
EP1780410B1 (en) * | 2005-10-26 | 2013-04-03 | Poclain Hydraulics | Variable displacement hydraulic machine having a swash plate |
CN101415944B (en) * | 2006-03-14 | 2010-12-22 | 朱荣辉 | Axial plunger pump or motor |
DE102006023397B4 (en) * | 2006-05-17 | 2015-02-05 | Man Diesel & Turbo, Filial Af Man Diesel & Turbo Se, Tyskland | Plain bearing, method for producing and use of such a sliding bearing |
GB0618745D0 (en) * | 2006-09-22 | 2006-11-01 | Boc Group Plc | Molecular drag pumping mechanism |
DE102007022568A1 (en) * | 2007-05-14 | 2008-11-20 | Robert Bosch Gmbh | Retaining segment |
DE102007022567A1 (en) * | 2007-05-14 | 2008-11-20 | Robert Bosch Gmbh | axial piston |
DE102007022569A1 (en) * | 2007-05-14 | 2008-11-20 | Robert Bosch Gmbh | Axial piston machine with return device |
CN101815865B (en) * | 2007-08-20 | 2012-06-27 | 罗伯特-博世有限公司 | Axial piston machine in a swash-plate construction with an actuating device |
US7757598B2 (en) * | 2007-10-29 | 2010-07-20 | Parker-Hannifin Corporation | Hydrostatic bearing arrangement for pump swashplate having secondary angle |
WO2009129820A1 (en) | 2008-04-22 | 2009-10-29 | Siemens Aktiengesellschaft | Annealing of brazed components in a reducing gas |
DE102008027700A1 (en) | 2008-06-11 | 2009-12-17 | Linde Material Handling Gmbh | Bearing layer application process for sliding bearing component involves applying fluid to surface of component and sintering bearing layer onto the surface thus coated |
DE102008027698A1 (en) * | 2008-06-11 | 2009-12-17 | Linde Material Handling Gmbh | Sliding bearing component for use as e.g. sliding bearing shell, in axial piston machine of industrial truck, has attached bearing layer provided with sliding layer, which exhibits material from graphite bronze |
DE102008061349A1 (en) * | 2008-09-08 | 2010-03-11 | Robert Bosch Gmbh | Hydrostatic piston machine with pulsation reduction device |
DE102009005390A1 (en) * | 2009-01-21 | 2010-07-22 | Robert Bosch Gmbh | Axial piston machine in bent axis design |
JP5385039B2 (en) * | 2009-07-24 | 2014-01-08 | 山陽特殊製鋼株式会社 | Powder for shot peening imparting slidability and surface compressive residual stress at the same time, and method for producing slidable member using the same |
ATE547193T1 (en) | 2009-11-27 | 2012-03-15 | Lmt Fette Werkzeugtechnik Gmbh & Co Kg | FORMING TOOL AND METHOD FOR PRODUCING A SURFACE ON A FORMING TOOL |
DE102010038651A1 (en) * | 2010-07-29 | 2012-02-02 | Robert Bosch Gmbh | Axial piston machine for use in e.g. mobile hydraulics as hydraulic drive system for hydraulic Hybrid vehicle to perform pump and engine operations, has bearings provided for eccentric bearing of swivel disk |
DE102011006102A1 (en) | 2011-03-25 | 2012-09-27 | Zf Friedrichshafen Ag | Adjustment device of a hydrostatic module |
DE102011101538A1 (en) * | 2011-05-14 | 2012-11-15 | Robert Bosch Gmbh | Axial piston engine has housing shell, whose top opening is closed by cover, where cylinder drum is pivoted on inner wall of housing shell, where cylinder drum is connected with shaft coaxial to rotational axis of cylinder drum |
DE102011053423A1 (en) | 2011-08-08 | 2013-02-14 | Linde Material Handling Gmbh | Hydrostatic positive displacement machine has bearing metal layer that is formed on sliding portion of steel of bearing point, which is melted by inductive reflow bearing metal material to steel of sliding portion |
DE102011113533A1 (en) * | 2011-09-15 | 2013-03-21 | Robert Bosch Gmbh | Hydrostatic axial piston machine user for swash plate construction, has cylinder piston unit whose axial section is encompassed with spring |
DE102012202742B3 (en) * | 2012-02-22 | 2013-05-16 | Sauer-Danfoss Gmbh & Co. Ohg | Swash plate swivel bearing for adjusting axial piston machine, has inner and outer guide comprising respective guide tracks, and cage guide comprising guide track that runs perpendicular to regions of guide tracks of inner and outer guides |
JP5063823B1 (en) * | 2012-04-13 | 2012-10-31 | 株式会社小松製作所 | Oblique shaft type axial piston pump / motor |
CH707789A1 (en) * | 2013-03-25 | 2014-09-30 | Liebherr Machines Bulle Sa | Piston for an axial piston. |
CN103267003B (en) * | 2013-04-16 | 2015-08-12 | 意宁液压股份有限公司 | Manual variable double-piston pump |
DE102016214425A1 (en) * | 2015-08-26 | 2017-03-02 | Robert Bosch Gmbh | Hydrostatic axial piston machine |
JP6612610B2 (en) * | 2015-12-17 | 2019-11-27 | ナブテスコ株式会社 | Fluid pressure pump and fluid pressure system |
-
2014
- 2014-03-12 CN CN201480036884.4A patent/CN105339657B/en active Active
- 2014-03-12 JP JP2016514280A patent/JP6426717B2/en active Active
- 2014-03-12 AU AU2014270792A patent/AU2014270792B2/en active Active
- 2014-03-12 WO PCT/EP2014/000658 patent/WO2014187512A1/en active Application Filing
- 2014-03-12 US US14/891,690 patent/US9664184B2/en active Active
- 2014-03-12 EP EP14710498.8A patent/EP2999885B1/en active Active
- 2014-03-12 CA CA2913062A patent/CA2913062C/en active Active
- 2014-04-05 WO PCT/EP2014/000920 patent/WO2014187518A1/en active Application Filing
- 2014-04-30 US US14/888,485 patent/US9782795B2/en not_active Expired - Fee Related
- 2014-04-30 EP EP14722109.7A patent/EP2999808A1/en not_active Withdrawn
- 2014-04-30 JP JP2016514290A patent/JP2016520171A/en active Pending
- 2014-04-30 WO PCT/EP2014/001166 patent/WO2014187531A1/en active Application Filing
- 2014-04-30 CA CA2912271A patent/CA2912271A1/en not_active Abandoned
- 2014-04-30 CN CN201480029168.3A patent/CN105247103B/en not_active Expired - Fee Related
- 2014-04-30 AU AU2014270757A patent/AU2014270757B2/en not_active Ceased
- 2014-05-15 CA CA2911607A patent/CA2911607A1/en not_active Abandoned
- 2014-05-15 EP EP14724320.8A patent/EP2999884B1/en active Active
- 2014-05-15 WO PCT/EP2014/001323 patent/WO2014187546A1/en active Application Filing
- 2014-05-15 US US14/785,435 patent/US20160076525A1/en not_active Abandoned
- 2014-05-15 EP EP14724319.0A patent/EP2999882B1/en not_active Not-in-force
- 2014-05-15 JP JP2016514295A patent/JP6697379B2/en active Active
- 2014-05-15 AU AU2014270772A patent/AU2014270772A1/en not_active Abandoned
- 2014-05-15 JP JP2016514294A patent/JP6337097B2/en not_active Expired - Fee Related
- 2014-05-15 CN CN201480029158.XA patent/CN105308318A/en active Pending
- 2014-05-15 AU AU2014270771A patent/AU2014270771B2/en not_active Ceased
- 2014-05-15 WO PCT/EP2014/001322 patent/WO2014187545A1/en active Application Filing
- 2014-05-15 CA CA2912593A patent/CA2912593C/en active Active
- 2014-05-15 US US14/891,383 patent/US10527029B2/en active Active
- 2014-05-15 CN CN201480037558.5A patent/CN105378278B/en active Active
- 2014-05-16 CN CN201480023828.7A patent/CN105164414B/en not_active Expired - Fee Related
- 2014-05-16 US US14/778,132 patent/US9849482B2/en not_active Expired - Fee Related
- 2014-05-16 EP EP14724649.0A patent/EP2999883B1/en not_active Not-in-force
- 2014-05-16 AU AU2014270773A patent/AU2014270773B2/en not_active Ceased
- 2014-05-16 WO PCT/EP2014/001328 patent/WO2014187547A1/en active Application Filing
- 2014-05-16 JP JP2016514296A patent/JP6453856B2/en not_active Expired - Fee Related
- 2014-05-16 CA CA2908504A patent/CA2908504A1/en not_active Abandoned
-
2018
- 2018-06-19 AU AU2018204390A patent/AU2018204390B2/en active Active
Non-Patent Citations (2)
Title |
---|
None * |
See also references of WO2014187531A1 * |
Also Published As
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP2999808A1 (en) | Method for coating a pump component | |
EP4214417A1 (en) | Piston-cylinder assembly for a radial piston compressor, and radial piston compressor | |
DE69728327T2 (en) | Apparatus for coating compressor pistons | |
DE102013008678A1 (en) | Process for coating a pump component | |
DE102015208886A1 (en) | Sliding shoe for a hydrostatic axial piston machine | |
DE3431328C2 (en) | ||
WO2005042975A1 (en) | Connecting plate for a hydrostatic machine and method for producing said connecting plate | |
DE10251552C5 (en) | Axial piston machine and control plate for an axial piston machine | |
EP3093489B1 (en) | Hydrostatic axial piston machine with inclined axes | |
EP3055565A1 (en) | Swashplate machine | |
DE4406803A1 (en) | Hydraulic piston pump | |
CH717705A1 (en) | Component with a coating. | |
DE102010036268A1 (en) | Hydrostatic piston engine has bearing metal layer formed on slide support structure of hydrostatic sliding bearing position by laser welding | |
EP3987183A1 (en) | Radial reciprocating engine having a ball piston | |
EP2049796B1 (en) | Device for coupling a piston to an annular disc | |
DE102013205466A1 (en) | axial piston | |
DE102012218902A1 (en) | Hydrostatic piston machine, particularly hydrostatic axial piston machine, has cylinder drum, in which one or multiple cylinder bores are formed, where layer of friction-reducing material is applied on walls of cylinder bores | |
WO2020249682A1 (en) | Component of a piston machine and method for producing the component | |
DE60103826T2 (en) | Coating a swash plate of a compressor | |
WO2015086260A1 (en) | Swashplate machine | |
WO2015150045A1 (en) | Swash plate machine as an axial piston pump and/or axial piston motor | |
WO2015150047A1 (en) | Swash plate machine as an axial piston pump and/or axial piston motor | |
DE102021202936A1 (en) | Axial piston machine with ball joint made from rotationally symmetrical individual parts | |
DE102022201865A1 (en) | Valve and axial piston machine with one valve | |
WO2015140033A1 (en) | Swashplate-type machine as axial piston pump and/or axial piston motor |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
17P | Request for examination filed |
Effective date: 20151031 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
AX | Request for extension of the european patent |
Extension state: BA ME |
|
DAX | Request for extension of the european patent (deleted) | ||
17Q | First examination report despatched |
Effective date: 20161121 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN |
|
18W | Application withdrawn |
Effective date: 20181224 |