EP1960665A1 - Hydrostatische kolbenmaschine mit ausgangsvolumen strom in umfangsrichtung - Google Patents
Hydrostatische kolbenmaschine mit ausgangsvolumen strom in umfangsrichtungInfo
- Publication number
- EP1960665A1 EP1960665A1 EP06829506A EP06829506A EP1960665A1 EP 1960665 A1 EP1960665 A1 EP 1960665A1 EP 06829506 A EP06829506 A EP 06829506A EP 06829506 A EP06829506 A EP 06829506A EP 1960665 A1 EP1960665 A1 EP 1960665A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- channel
- hydrostatic piston
- control
- piston machine
- cylinder
- 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.)
- Granted
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
- F04B1/20—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
- F04B1/2021—Details or component parts characterised by the contact area between cylinder barrel and 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
- F04B1/20—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
- F04B1/2042—Valves
-
- 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
-
- 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
Definitions
- the invention relates to a hydrostatic piston engine.
- the maximum achievable speed is largely determined by the flow conditions at the entrance of the pressure medium from the suction-side control kidneys in the cylinder bores. Improvements in the fluidic boundary conditions, the inflow of the pressure medium can be improved in the cylinder drums on the suction side. However, due to the geometric conditions, such measures as increasing the flow-through cross-section by increasing the opening in the cylinder barrel or the surface of the suction kidney are likewise limited, as are the improvement of the inflow factor, for example by rounded edges.
- the described arrangement has the disadvantage that an additional pump is necessarily required, which gives the sucked pressure medium additional energy.
- the arrangement of the impeller in the axial extension of the shaft of the piston engine also has the disadvantage that the space of the hydrostatic piston engine increases considerably. In this case, a different arrangement can not be provided because due to the special nature of the impeller blade ends must be located directly in the area of entry into the control animals.
- the invention has for its object to provide a hydrostatic piston engine, in which the speed limit existing by the suction-side flow conditions is increased.
- a cylinder drum is rotatably mounted in a housing.
- a plurality of cylinder bores are arranged, which are connectable via cylinder openings in the cylinder drum with a first and a second control opening.
- the cylinder openings of the cylinder bores are alternately connected to the first and second control ports.
- the first control port communicates with a low pressure line and the second control port communicates with a high pressure line.
- a first port of a channel and opposite a second port of the channel are connected to the first control port.
- the opposite arrangement of the two ports of the channel results in a secondary circuit, wherein the first control opening is provided as part of this auxiliary circuit.
- auxiliary pump can be completely dispensed with in the simplest case.
- the formation of the flow is not caused by the acceleration by means of the wings of an impeller, but solely due to the flow in the secondary circuit during the suction of the pressure medium from the low-pressure line.
- a part of the pressurized fluid sucked in from the low-pressure line through the control port is used to fill the cylinder bore, whereas the other part flows into the port connected to the control port at the first port.
- the pressure medium is conveyed back to the second port, where it meets the inflowing from the low pressure line pressure fluid and thus provides an acceleration of the sucked pressure fluid in the circumferential direction.
- the first and the second connection are on a common circumferential circle, which is arranged centrally about the axis of rotation of the cylinder drum.
- the flow direction formed in the first control opening coincides exactly with the circumferential direction of the cylinder drum.
- the flow direction in the first Steueröffnu ⁇ g and the direction of movement of the cylinder opening are thus parallel along the first control opening, whereby the entry conditions for the pressure medium in the cylinder bores improve.
- the low pressure line discharges into the channel.
- the pressure medium conveyed in the channel in a circle as well as the newly sucked-in pressure medium from the low-pressure lines are thus already mixed with one another before entering the area of the first control opening and brought to a common speed.
- the pressure medium is then supplied via the common port of the first control port, whereby no mutual negative influence on the flow direction can occur through two existing in the region of the first control port connections.
- connection plate it is advantageous to provide a connecting portion of the channel on the outside of a connecting plate of a hydrostatic piston machine.
- the casting geometries required to make the terminal plate are kept simple. It is only necessary to provide the connections to the first control opening on the connection plate.
- a piping can then be arranged on the outside of the connection plate in a simple manner.
- a particularly advantageous arrangement of the channel is arranged in a formed between the two control openings portion of the connection plate.
- the provision of the channel in the region between the two control openings leads to an optimized utilization of the available installation space of the connection plate. An enlargement of the connection plate, wherein the channel is accommodated in the enlarged area, is therefore not necessary.
- the control opening is generally kidney-shaped, so that the flow takes place at an arranged between the control kidney channel approximately along an oval. Stronger deflections, such as those required for out-of-control channel passage, can thus be dispensed with.
- the channel may be advantageous to connect the channel to an auxiliary pump.
- even higher flow velocities can be achieved within the channel and thus the peripheral speed of the pressure medium in the region of the first control opening can be adapted to even higher rotational speeds.
- Fig. 1 is a sectional view of a hydrostatic piston engine
- FIG. 2 shows a schematic representation of a first embodiment of a connection plate of the hydrostatic piston machine according to the invention
- Fig. 3 is a schematic representation of a second embodiment of a connection plate of a hydrostatic piston machine according to the invention.
- connection plate is a view of the connection plate along the section IH-III of FIG .. 3
- the hydrostatic piston machine 1 has a connection plate 2; which forms a housing of the hydrostatic piston machine 1 together with a housing part 9.
- a drive shaft 5 is rotatably mounted in a first bearing 17 and a second bearing 18, wherein a portion 24 of the drive shaft 5 is rotatably connected to a corresponding portion 23 of a cylinder drum 6.
- the cylinder drum 6 is located on the terminal plate 2 facing the end of a control mirror 4, which is designed spherical in the illustrated embodiment and the cylinder drum 6 centered in this way on a corresponding recess.
- a first control opening 12 and a second control opening 15 are provided in the connection plate 2.
- the control openings 12 and 15 are over Low pressure or high pressure ports 16S and 16D connected to a low pressure line or a high pressure line, which are not shown in FIG.
- the control mirror 4 with the first control port 12 and the second control port 15 corresponding openings 19 and 20, respectively.
- the cylinder openings 27 are arranged in the cylinder drum 6 that they at a
- bushings 28 are introduced in the cylinder bores 26 .
- each piston 29 are arranged in the liners 28 .
- the pistons 29 are connected via a ball joint 30 with a sliding shoe 31.
- the shoe 31 is supported on a disc
- a lubricating oil bore 33 is provided in the sliding block 31.
- the disc 32 is fixedly connected to a pivoting cradle 3, on which a lever arm 14 is arranged.
- the lever arm 14 is in operative connection with an adjusting piston 13, whereby the inclination angle of the pivoting cradle 3 relative to the axis of rotation of the drive shaft 5 is adjustable.
- the pistons 29 in the cylinder drum 6 in their respective cylinder bores 26 perform a lifting movement.
- the pressure medium displaced from the cylinder bore 26 by the piston 29 is conveyed via the second control opening 15 and the high-pressure port 16D, for example, into a working line (not shown).
- FIG. 2 shows a schematic representation of a first exemplary embodiment of a connection plate 2 of a hydrostatic piston machine 1 according to the invention.
- the connection plate 2 is shown in FIG. 2 with its side facing the interior of the hydrostatic piston machine 1.
- a first control opening 12 and a second control opening 15 can be seen.
- the first control port 12 and the second control port 15 are formed as a control.
- the control kidneys extend along a circumferential circle 35 which is arranged centrally with respect to the axis of rotation of the drive shaft 5.
- the radius of the circumferential circle 35 corresponds to the distance of the center of the cylinder openings 27 from the axis of rotation of the drive shaft 5.
- the cylinder openings 27 are alternately in registration with the first control opening 12 and the second control opening 15th
- the second control port 15 is connected via the high pressure port 16D to a high pressure side working line of a hydraulic circuit, not shown.
- the first control port 12 is on the other hand over the
- connection plate shown is for connecting the hydrostatic piston engine 1 in an open
- a channel 37 is provided which forms a secondary circuit and is connected to the first control port 12 via a first connection 38 and a second connection 39. Adjacent to the first connection 38 or second connection 39, the channel 37 has a first section 40 and a second section 41, respectively.
- the first section 40 which adjoins the first connection 38, runs initially along the circumference circle 35 or tangentially, before it is guided to a pipe connection 42 towards the outside of the connection plate 2.
- the second section 41 of the channel 37 also continues along the circumference circle 35 or tangentially, before it is led out of the connection plate 2 toward a second pipe connection 43.
- the first pipe connection 42 is connected to the second pipe connection 43 via an external piping 44.
- the outer casing is shown in one piece. However, it is equally possible to provide a multi-part casing 44, wherein it may be particularly advantageous to increase the flow velocity within the channel 37 through an auxiliary pump arranged in or connected to the channel 37.
- the merging of the low pressure port 16 S and the channel 37 is provided outside of the terminal plate 2.
- the channel 37 has for this purpose a branch 45.
- the common entry of the pressure medium sucked in via the low-pressure connection 16S with the pressure medium flowing in the channel 37 through the first pipe connection 42 and the common first portion 40 has the advantage that at the time of entry into the first control port 12, the entire flowing pressure medium already has a substantially homogeneous velocity distribution. This affects both the amount of speed and the direction of flow.
- the flow direction is approximately parallel to the plane of the drawing and extends along the perimeter circle 35 in the direction indicated by the arrow. The direction of flow thus coincides with the direction of rotation of the cylinder drum 6, wherein a match of the rotational speed with the flow velocity along the circumference circle 35 of the first control opening 12 is preferably provided.
- connection plate 2 instead of the branch 45 outside the connection plate 2, it is also possible to provide a low-pressure connection 16S for supplying the pressure medium from the tank volume 36, which is connected via a separate connection point with a corresponding channel within the connection plate 2.
- the channel 37 is to be executed in each case as low loss.
- FIG. 3 shows a further embodiment of a connection plate .2 '.
- the channel 37 is in the
- Embodiment of FIG. 3 designed as an internal channel within the connection plate 2 '.
- the channel 37 in the region of the sections 40 'and 41' adjacent to the first terminal 38 and the second terminal 39 is preferably also continued in the circumferential direction.
- Section 41 ' are connected via a connecting portion 50 of
- the merging of the pumped in the channel 37 in the circuit pressure medium and the low pressure port 16S sucked pressure medium takes place in a unification region 51, which is preferably arranged in the region of the first portion 40 '.
- connection plate 2 and 2 'are Both in Fig. 2 and in Fig. 3 is indicated by the dashed line illustration, that the individual channel sections or connections in a non-visible region of the connection plate 2 and 2 'are and to the in Figs. 2 visible surface of the connection plates 2 and 2 'are not open.
- FIG. 4 A sectional view of the connection plate 2 'along the line III-III is shown in FIG. 4.
- the housing interior of the hydrostatic piston engine 1 facing side of the connection plate 2 ' is shown. Accordingly, the outlets of the first control opening 12 and the second control opening 15 can be seen.
- a suction line channel 52 and the first section 40 ' open out. The two partial flows combine in the merging region 51 and flow together into the region of the first control opening 12.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Reciprocating Pumps (AREA)
- Hydraulic Motors (AREA)
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102005059565A DE102005059565A1 (de) | 2005-12-13 | 2005-12-13 | Hydrostatische Kolbenmaschine mit Ausgangsvolumenstrom in Umfangsrichtung |
PCT/EP2006/011919 WO2007068431A1 (de) | 2005-12-13 | 2006-12-11 | Hydrostatische kolbenmaschine mit ausgangsvolumen strom in umfangsrichtung |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1960665A1 true EP1960665A1 (de) | 2008-08-27 |
EP1960665B1 EP1960665B1 (de) | 2011-07-20 |
Family
ID=37806968
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP06829506A Not-in-force EP1960665B1 (de) | 2005-12-13 | 2006-12-11 | Hydrostatische kolbenmaschine mit ausgangsvolumen strom in umfangsrichtung |
Country Status (5)
Country | Link |
---|---|
US (1) | US8387514B2 (de) |
EP (1) | EP1960665B1 (de) |
AT (1) | ATE517258T1 (de) |
DE (1) | DE102005059565A1 (de) |
WO (1) | WO2007068431A1 (de) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102010035457A1 (de) * | 2010-08-26 | 2012-03-01 | Robert Bosch Gmbh | Ventilanordnung, Anschlussplatte für eine hydrostatische Kolbenmaschine und hydrostatische Kolbenmaschine |
DE102010045867A1 (de) | 2010-09-17 | 2012-03-22 | Robert Bosch Gmbh | Axialkolbenmaschine |
DE102018205884A1 (de) * | 2018-04-18 | 2019-10-24 | Robert Bosch Gmbh | Axialkolbenmaschine mit Druckentlastung in den Durchtriebsraum |
DE102021200205A1 (de) * | 2021-01-12 | 2022-07-14 | Robert Bosch Gesellschaft mit beschränkter Haftung | Axialkolbenmaschine mit hoher Antriebdrehzahl |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE976964C (de) * | 1951-11-13 | 1964-09-17 | Albert Schacht | OEldrosseleinrichtung zwischen den Gleitflaechen, insbesondere zwischen den Steuerflaechen an Axialkolben-Fluessigkeitsgetrieben mit umlaufendem Kolben |
DE1211943B (de) * | 1957-01-18 | 1966-03-03 | Bosch Gmbh Robert | Einrichtung zur Geraeuschminderung bei einer als Pumpe oder Motor verwendbaren, drehschiebergesteuerten hydraulischen Axial- oder Radialkolbenmaschine |
US3170297A (en) * | 1963-09-30 | 1965-02-23 | Bendix Corp | Hydrostatic thrust bearing device |
JPS5444208A (en) | 1977-09-13 | 1979-04-07 | Kawasaki Heavy Ind Ltd | Fluid pump |
US4281971A (en) | 1979-07-31 | 1981-08-04 | Abex Corporation | Inlet inducer-impeller for piston pump |
SE507637C2 (sv) * | 1991-09-06 | 1998-06-29 | Parker Hannifin Ab | Förfarande och anordning för dämpning av flödespulsationer vid hydrostatiska hydraulmaskiner av deplacementtyp samt anordning för utövande av förfarandet |
US5440878A (en) * | 1992-08-27 | 1995-08-15 | Vernon E. Gleasman | Variable hydraulic machine |
DE19521574A1 (de) | 1995-06-14 | 1996-12-19 | Rexroth Mannesmann Gmbh | Hydrostatische Maschine |
DE19706114C9 (de) * | 1997-02-17 | 2014-02-06 | Linde Hydraulics Gmbh & Co. Kg | Vorrichtung zur Pulsationsverminderung an einer hydrostatischen Verdrängereinheit |
DE10206957B4 (de) | 2002-02-19 | 2014-09-04 | Linde Hydraulics Gmbh & Co. Kg | Hydrostatische Verdrängereinheit mit einer Vorrichtung umfassend ein Speicherelement zur Verminderung von Pulsationen |
DE102004007933B3 (de) * | 2004-02-18 | 2005-06-16 | Sauer-Danfoss (Neumünster) GmbH & Co OHG | Axialkolbenmaschine mit einer Vorsteuerungseinrichtung zur Dämpfung von Strömungspulsationen und Herstellungsverfahren |
-
2005
- 2005-12-13 DE DE102005059565A patent/DE102005059565A1/de not_active Withdrawn
-
2006
- 2006-12-11 AT AT06829506T patent/ATE517258T1/de active
- 2006-12-11 US US12/097,176 patent/US8387514B2/en not_active Expired - Fee Related
- 2006-12-11 EP EP06829506A patent/EP1960665B1/de not_active Not-in-force
- 2006-12-11 WO PCT/EP2006/011919 patent/WO2007068431A1/de active Application Filing
Non-Patent Citations (1)
Title |
---|
See references of WO2007068431A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO2007068431A1 (de) | 2007-06-21 |
ATE517258T1 (de) | 2011-08-15 |
EP1960665B1 (de) | 2011-07-20 |
US20080295680A1 (en) | 2008-12-04 |
DE102005059565A1 (de) | 2007-06-14 |
US8387514B2 (en) | 2013-03-05 |
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