EP1225331A2 - Zylindertrommel für hydrostatische Axialkolbenmaschinen - Google Patents
Zylindertrommel für hydrostatische Axialkolbenmaschinen Download PDFInfo
- Publication number
- EP1225331A2 EP1225331A2 EP01129518A EP01129518A EP1225331A2 EP 1225331 A2 EP1225331 A2 EP 1225331A2 EP 01129518 A EP01129518 A EP 01129518A EP 01129518 A EP01129518 A EP 01129518A EP 1225331 A2 EP1225331 A2 EP 1225331A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- cylinder drum
- cylinder
- cooling fins
- grooves
- drum according
- 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- Withdrawn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
- 230000002706 hydrostatic effect Effects 0.000 title claims description 3
- 238000001816 cooling Methods 0.000 claims abstract description 46
- 239000003921 oil Substances 0.000 description 10
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 241000237942 Conidae Species 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 239000010721 machine oil Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
Images
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
- F04B1/20—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
- 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
- F04B53/08—Cooling; Heating; Preventing freezing
Definitions
- the invention is based on a cylinder drum for hydrostatic Piston machines according to the type of the main claim.
- a disadvantage of that described in DE 28 05 492 A1 Arrangement for cooling is that to achieve a larger one Cooling capacity the oil volume in the groove from time to time must be replaced, which in turn only by a leakage current can be reached. Forming a leakage flow results in a reduction in efficiency.
- To one adequate cooling of the particularly vulnerable area of the The groove is to ensure the piston and the running surface arranged on the side of the cylinder opening. This reduces However, the bearing surface of the piston on the Cylinder track in the particularly heavily used area. The unchanged balance of power thus leads to a greater surface pressure, causing a greater tendency to The lubricating film is torn off.
- the invention has for its object one of the operating state to allow independent cooling, their function is independent of the formation of a leak oil flow.
- the task is characterized by Features of the main claim solved.
- cooling fins are arranged, through which an enlarged Surface is created, which is a better one Heat exchange with the surrounding medium guaranteed.
- the Cylinder drum is in a hydraulic medium, e.g. B. oil, filled housing arranged so that the cooling fins in constant contact with the leakage volume of the hydraulic medium are.
- the heat caused by friction in the treads of the Bushings is inserted, is thus to the surrounding Passed on and finally to the housing of the Axial piston machine delivered. This is the cooling capacity not dependent on the hydraulic work performed, and above all, the functionality remains idle receive.
- cooling fins in the form of grooves in the Cylinder drum enables the surface to be enlarged while maintaining the required installation space. It also shortens the thin wall thickness at the bottom the length of the grooves made remains which the heat must be transferred by conduction.
- the depth of the grooves larger than the minimum Wall thickness of the cylinder drum between the liner and radially outer circumference.
- the direct contact between the liner and the surrounding oil improves the Dissipates heat and reduces the temperatures in the liner further.
- cooling fins are advantageously the Strength of the cylinder drum increased.
- the outer perimeter attached, all-round bars act like barrel rings.
- An orientation of the cooling fins perpendicular to the central axes the cylinder bores has the advantage that the cooling fins are only subjected to tensile stress, which increases the mechanical resilience. Especially This is advantageous if the depth of the grooves is chosen in this way is that between the cylinder bore and the bottom of the There is a thin wall. At perpendicular to the central axes of the cylinder bores oriented grooves results thus a constant wall thickness, which leads to a symmetrical Stress distribution leads. This creates the notch effect reduced and the mechanical resilience increased.
- Fig. 1 is a first embodiment of an inventive Cylinder drum 1 shown.
- the cylinder drum 1 is arranged in a housing, not shown, which z. B. filled with oil as the hydraulic medium is.
- the cylinder drum 1 is in an oil bath.
- a drive shaft not shown driven by a prime mover.
- the drive shaft engages in a toothing 3, which in a recess Cylinder drum 1 is arranged.
- the central axes 13 of the Cylinder rooms 4 are even over a circumference distributed, the concentric to the central axis 12 of the cylinder drum 1 is arranged.
- the central axes 13 of the cylinder rooms 4 close with the central axis 12 of the cylinder drum 1 an angle other than zero.
- the Central axes 13 of the cylinder spaces 4 lie on one common cone shell.
- the cylinder spaces 4 are through Cylinder bores 5 formed.
- the cylinder bores 5 are made as blind holes from the side of the toothing 3 introduced into the cylinder drum 1.
- Mouth channels 17 are the cylinder spaces 4 to one Front 6 of the cylinder drum 1 open.
- the cylinder drum 1 With the End face 6, the cylinder drum 1 is not on one shown control disc. A control disc and that Front side 6 have corresponding surface geometries on, so that the cylinder drum 1, which is in contact with the Control disc is held, is centered.
- a radially expanded part 8 To the open End 9 of the cylinder bore 5 points toward the cylinder bore 5 a radially expanded part 8.
- a liner 7 In the extended part 8 of the cylinder bore 5, a liner 7 is pressed.
- the liner 7 has the shape of a hollow cylinder and forms a tread 14 on its inside Inner diameter of the liner 7 is approximately identical to the cylinder bore 5 in the not expanded Part.
- cooling fins 10 are arranged on the outer circumference.
- the cooling fins 10 are the side of the open end 9 preferably arranged in this area. In the illustrated 1 are the cooling fins 10 formed by grooves 11 introduced.
- the Width of the grooves as well as the number and their distribution in axial direction are the required cooling capacity customized.
- the grooves 11 are continuous in the outer circumference 15 of the cylinder drum 1 introduced. she run concentrically to the central axis 12 of the cylinder drum 1. Due to the arrangement of the cylinder drum 1 in The grooves 11 are a housing filled with leakage volume filled with hydraulic medium. The heat to be dissipated from the Liner 7 is from the hydraulic medium to the housing passed.
- the liner 7 is also special in that critical case of high speed of the cylinder drum 1 cooled piston stroke at the same time.
- FIG. 2 A second embodiment of an inventive Cylinder drum 1 is shown in Fig. 2.
- the cooling fins 10 are also by the introduction of grooves 11 in the cylinder drum 1 executed.
- the depth of the introduced grooves 11 larger than the smallest wall thickness the cylinder drum 1. This eliminates in one area the liner 7 the formation of a bottom of the groove 11. In Area of the grooves 11, the liner 7 forms an open Area 17 out.
- the open area 17 is in direct Contact with the hydraulic medium and thus enables one improved heat exchange.
- the loss of heat transfer between the liner 7 and the cylinder drum 1 increased the cooling capacity.
- the grooves 11 of the two shown in Figs. 1 and 2 Embodiments can easily in the Cylinder drum 1 are introduced, e.g. go berserk.
- Fig. 3 is a third embodiment of an inventive Cylinder drum 1 shown. Starting from the outer periphery 15 of the cylinder drum 1 are on the open end 9, the cooling fins 10 as radial extensions appropriate. Despite the enlargement of the surface by the Cooling fins 10 is the mechanical strength in the area of open end 9 not reduced. The original wall thickness between the radially enlarged area 8 of the cylinder bore 5 and the outer circumference 15 is retained.
- cooling fins 10 act similar to barrel rings and increase the strength.
- FIG. 4 A fourth embodiment of an inventive Cylinder drum is shown in Fig. 4.
- which on the other hand formed by the introduction of grooves 11 cooling fins 10 are introduced into the cylinder drum 1 so that the Flanks 18 of the cooling fins 10 form part of a lateral surface form a cone, the cone surface of the central axis 13 the cylinder bore 5 intersects at a right angle.
- the Bottom 16 of the grooves 11 runs parallel to the enlarged one Area 8 of the cylinder bore 5. This results in a almost symmetrical introduction of forces into the Cylinder drum 1 and it is created in the area of the grooves 11 no voltage peaks.
- the notch effect is due to the parallel alignment of the base 16 of the grooves 11 reduced.
- the relative to the central axes 13 of the Cylinder bores 5 cooling fins 10 arranged at right angles can in the illustrated in Fig. 2 and Fig. 3 Cylinder drums 1 can also be used.
- the cooling capacity can be varied by varying the number as well the geometry of the cooling fins 10 vary.
- the in axial Successive cooling fins 10 can be the same or have different cross sections and distances.
- the flexibility of the cooling fins 10 also means that Elasticity of the cylinder drum 1 in the area of the guide influenced.
- the cylinder drum 1 can be special mechanical requirements can be adjusted.
- the cooling fins 10 are both flexible Shaping as well as the use of certain materials or material pairings controllable.
- the invention is not only in axial piston machines, but also applicable to radial piston machines.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Pistons, Piston Rings, And Cylinders (AREA)
- Reciprocating Pumps (AREA)
Abstract
Description
- Fig. 1
- ein erstes Ausführungsbeispiel einer erfindungsgemäßen Zylindertrommel mit in die Zylindertrommel eingebrachte Nuten als Kühlrippen;
- Fig. 2
- ein zweites Ausführungsbeispiel einer erfindungsgemäßen Zylindertrommel mit in die Zylindertrommel eingebrachte Nuten als Kühlrippen;
- Fig. 3
- ein drittes Ausführungsbeispiel einer erfindungsgemäßen Zylindertrommel mit umfänglich angeordneten Stegen als Kühlrippen; und
- Fig. 4
- ein viertes Ausführungsbeispiel einer erfindungsgemäßen Zylindertrommel.
Claims (9)
- Zylindertrommel für hydrostatische Kolbenmaschinen mit mehreren in die Zylindertrommel (1) eingebrachten Zylinderbohrungen (5), in denen zur Aufnahme von Kolben Laufbuchsen (7) angeordnet sind, deren Innenwände (14) die Gleitflächen für die Kolben bilden, und einem Gehäuse, in dem die Zylindertrommel (1) angeordnet ist und in dessen Innenraum ein Leckvolumen ausgebildet ist,
dadurch gekennzeichnet, daß an dem Umfang der Zylindertrommel (1) Kühlrippen (10) angeordnet sind, die im Betrieb der Kolbenmaschine zumindest teilweise in das Leckvolumen eintauchen. - Zylindertrommel nach Anspruch 1,
dadurch gekennzeichnet, daß die Kühlrippen (10) um die Zylindertrommel (1) umlaufend ausgeführt sind. - Zylindertrommel nach Anspruch 1 oder 2,
dadurch gekennzeichnet, daß die Kühlrippen (10) als Nuten (11) ausgeführt sind. - Zylindertrommel nach Anspruch 3,
dadurch gekennzeichnet, daß die Tiefe der Nuten (11) kleiner ist als die jeweils mit einer Nut (11) korrespondierende kleinste Wandstärke zwischen der Laufbuchse (7) und der radial äußeren Ausdehnung der Zylindertrommel (1). - Zylindertrommel nach Anspruch 3,
dadurch gekennzeichnet, daß die Tiefe der Nuten (11) größer ist als die jeweils mit einer Nut (11) korrespondierende kleinste Wandstärke zwischen der Laufbuchse (7) und der radial äußeren Ausdehnung der Zylindertrommel (1). - Zylindertrommel nach Anspruch 1 oder 2,
dadurch gekennzeichnet, daß die Kühlrippen (10) als umlaufende Stege am Umfang der Zylindertrommel (1) angeordnet sind. - Zylindertrommel nach einem der Ansprüche 1 bis 6,
dadurch gekennzeichnet, daß die Kühlrippen (1) eine identische Geometrie aufweisen. - Zylindertrommel nach einem der Ansprüche 1 bis 7,
dadurch gekennzeichnet, daß die Kühlrippen (10) eine Mantelfläche eines Kegelstumpfs bilden, der mit der Mittelachse (13) der Zylinderbohrungen (5) einen rechten Winkel einschließt. - Zylindertrommel nach einem der Ansprüche 1 bis 8,
dadurch gekennzeichnet, daß zumindest ein Teil der Kühlrippen (10) als elastische Elemente ausgeführt sind, so daß die Elastizität der Zylindertrommel (1) im Führungsbereich der Kolben gezielt beeinflußbar ist.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10102988 | 2001-01-23 | ||
| DE10102988 | 2001-01-23 | ||
| DE10106873A DE10106873B4 (de) | 2001-01-23 | 2001-02-14 | Zylindertrommel für hydrostatische Axialkolbenmaschinen |
| DE10106873 | 2001-02-14 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1225331A2 true EP1225331A2 (de) | 2002-07-24 |
| EP1225331A3 EP1225331A3 (de) | 2003-06-11 |
Family
ID=26008305
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP01129518A Withdrawn EP1225331A3 (de) | 2001-01-23 | 2001-12-11 | Zylindertrommel für hydrostatische Axialkolbenmaschinen |
Country Status (1)
| Country | Link |
|---|---|
| EP (1) | EP1225331A3 (de) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014181737A1 (ja) * | 2013-05-07 | 2014-11-13 | 川崎重工業株式会社 | 液圧回転装置 |
| CN113266518A (zh) * | 2016-11-10 | 2021-08-17 | 川崎重工业株式会社 | 缸体及具备该缸体的斜板型液压旋转装置 |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2805492A1 (de) | 1978-02-09 | 1979-08-16 | Linde Ag | Anordnung zum kuehlen der kolben bei einer axialkolbenmaschine |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU5917865A (de) * | 1966-05-20 | 1967-11-23 | ||
| DE1929403A1 (de) * | 1969-06-10 | 1971-04-08 | Gerhard Hofmann | Kolbenkraftmaschine,vorzugsweise Pumpe oder Verbrennungsmotor |
| DE9206567U1 (de) * | 1992-05-14 | 1992-07-30 | Walter Voss GmbH Armaturenfabrik, 4322 Sprockhövel | Axialkolbenpumpe |
| DE4423023C2 (de) * | 1994-06-30 | 1998-07-09 | Brueninghaus Hydromatik Gmbh | Axialkolbenmaschine mit einem Kühlkreislauf für die Zylinder und Kolben |
-
2001
- 2001-12-11 EP EP01129518A patent/EP1225331A3/de not_active Withdrawn
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2805492A1 (de) | 1978-02-09 | 1979-08-16 | Linde Ag | Anordnung zum kuehlen der kolben bei einer axialkolbenmaschine |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014181737A1 (ja) * | 2013-05-07 | 2014-11-13 | 川崎重工業株式会社 | 液圧回転装置 |
| CN113266518A (zh) * | 2016-11-10 | 2021-08-17 | 川崎重工业株式会社 | 缸体及具备该缸体的斜板型液压旋转装置 |
Also Published As
| Publication number | Publication date |
|---|---|
| EP1225331A3 (de) | 2003-06-11 |
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| 17P | Request for examination filed |
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| AKX | Designation fees paid |
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