EP2350461A1 - Hydraulisches steuerventil für einen einseitig arbeitenden differentialzylinder - Google Patents
Hydraulisches steuerventil für einen einseitig arbeitenden differentialzylinderInfo
- Publication number
- EP2350461A1 EP2350461A1 EP09759882A EP09759882A EP2350461A1 EP 2350461 A1 EP2350461 A1 EP 2350461A1 EP 09759882 A EP09759882 A EP 09759882A EP 09759882 A EP09759882 A EP 09759882A EP 2350461 A1 EP2350461 A1 EP 2350461A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- valve
- piston
- control
- connection
- working 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
- 239000012530 fluid Substances 0.000 claims abstract description 16
- 238000006073 displacement reaction Methods 0.000 claims description 40
- 150000001875 compounds Chemical class 0.000 claims 1
- 238000013461 design Methods 0.000 abstract description 11
- 230000001747 exhibiting effect Effects 0.000 abstract 1
- 230000000903 blocking effect Effects 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 230000018109 developmental process Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000009699 differential effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
- F15B13/0401—Valve members; Fluid interconnections therefor
- F15B13/0402—Valve members; Fluid interconnections therefor for linearly sliding valves, e.g. spool valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/021—Valves for interconnecting the fluid chambers of an actuator
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/02—Systems essentially incorporating special features for controlling the speed or actuating force of an output member
- F15B11/024—Systems essentially incorporating special features for controlling the speed or actuating force of an output member by means of differential connection of the servomotor lines, e.g. regenerative circuits
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
- F15B2211/205—Systems with pumps
- F15B2211/2053—Type of pump
- F15B2211/20538—Type of pump constant capacity
Definitions
- the invention relates to a hydraulic control valve for controlling a piston having a one-sided piston rod having double-acting working cylinder, the piston valve constructed in the control valve four external connections with associated, formed in the valve housing ring channels, namely a pump port P, a port A for a supply and discharge line to the large displacement of the working cylinder, a port B for a supply and discharge line to the small displacement of the working cylinder and a tank leading tank T, and the terminals arranged by a longitudinally displaceable, formed by means arranged in this recesses piston collars having control piston via corresponding over the circumference of the piston collars extending control edges are enabled or disabled, and wherein means for feeding back the extension of the piston rod from the small displacement of the working cylinder displaced and guided to the port B of the control valve fluid is provided in the large displacement of the working cylinder.
- a control valve with the aforementioned features is described in DE 30 00 260 C2.
- the well-known design of the control valve to a method of the piston of the working cylinder with differential action, ie with a quick piston movement, allow by a return of the working stroke of the differential cylinder, ie when extending the piston rod, from the small displacement of the working cylinder displaced fluid in the line leading from the control valve to the large displacement of the working cylinder is provided so that the pump must deliver only the same flow rate both during the working stroke of the working cylinder and during its return stroke with a retraction of the piston rod.
- a second external port A2 is initially formed on the housing, which via an additional external valve line connection to the leading from the port A to the larger displacement of the working cylinder supply and discharge line is connected to the working stroke of the working cylinder to be able to return the liquid displaced from the small displacement bypassing the pump.
- a second external port T2 is provided in order to divide the displaced during the return stroke of the working cylinder from the large displacement fluid flow and to be able to dissipate via the control valve. Accordingly, the control valve on a special control piston with three piston collars, since at least five control edges are required to control the j e election connection connections.
- control valve has a hole pattern different from the standard design of piston slide valves with six external holes Having terminals, and also a specially designed control piston.
- Another disadvantage is the outside of the control valve to the working cylinder to be provided line connection. Overall, therefore, manufacture and assembly of the known control valve in conjunction with a differential cylinder consuming.
- the invention is therefore based on the object, a generic control valve in such a way that the standard version of a valve housing with only four external terminals can be maintained.
- the invention provides in its basic idea that in the valve housing a fifth internal and associated with an associated control position of the control piston to the port B annular channel V is formed, which is connected via an internal bridge formed in the valve housing with the terminal A associated annulus, and that the connection of the connections A and T producing recess in the control piston is at least twice as large as the in the relevant control position of the valve piston, the terminals P and A and B and B and V connecting recesses. According to the invention thus takes place the feeding of the displaced from the small displacement of the working cylinder fluid in the terminal A associated annular space, so behind the effective between the terminals P and A control edge of the control piston. Thus prevails in the smaller displacement of the working cylinder substantially the same pressure as in the large displacement.
- the invention has the advantage that by the arrangement of a merely internal additional annular channel without the connection after outside and the valve-internal connection of this annular channel with the terminal A associated annular channel on the valve-internal bridge another housing connection is avoided.
- the need for a via the control valve during the return stroke of the working cylinder to the tank leading to fluid quantity is taken into account by the correspondingly large-sized recess in the control piston.
- the standard hole pattern of a conventional valve housing with four external terminals can be used in an advantageous manner, at the same time no external additional line connections between the control valve and the working cylinder or the leading thereto supply and discharge lines are required.
- a substantially standard trained control piston can be used with two piston collars, in which only an outer recess must receive a correspondingly larger dimension. Valve internally, only the fifth annular channel and the internal bridge are to be attached to the valve housing.
- the invention provides in a particular development of the principle according to the invention for maintaining only four external connections, that the internal bridge leading away from the fifth internal ring channel V is connected both to the annulus belonging to the terminal A and to the annulus associated with the tank terminal T, wherein in a thereto between the housing-internal bridge and the terminal A associated annular space configured connecting bore an in-valve check valve with a direction A to the inlet direction and in the downstream of the in-house bridge outgoing communication bore to the tank connection T belonging annulus leading portion of the housing internal bridge an externally controllable check valve for opening and closing the connection from V to T is arranged.
- control valve is now on the one hand continue on the fifth annular space and the housing-internal bridge with appropriate position of the control piston the return of faster piston serving connection of the external connections B and A given, the connection of the valve-internal bridge to the tank connection T via the valve internal Lock valve is locked and the check valve releases the connection from B to V in the direction of A. If you want to switch from faster piston travel to the full holding force, it is, as in the prior art, to open the connection between the terminals B and T, which is done by the switching of the valve internal check valve from its blocking position in its open position, so now the connection B via V directly relieved in the tank port T belonging annulus.
- valve-internal bridge Since the valve-internal bridge is connected to the annulus of T, the connection to the tank remains unaffected by the blocking of ports A and T by the associated piston collar of the valve piston.
- control valve is on the avoidance of valve external additional line connections and / or control valves addition of the particular advantage that the switch from faster piston travel to full holding force at any time, that is possible in any position of the piston of the working cylinder, because it only requires the externally to be effected control of the valve internal check valve.
- inventive design of the control valve Regardless of the timing of the aforementioned switching independent of the design of the control valve.
- valve-internal check valve is an electrically controllable check valve.
- FIG. 2 shows the control valve according to FIG. 1 in another embodiment with a possibility of switching over from fast piston travel to increasing the holding force
- FIG. 1 An initially resulting from Figure 1 working cylinder 10 has a displaceable therein and mutually different surfaces having piston 1 1 with a piston rod 12.
- the piston 1 1 divides the working cylinder 10 in a large capacity 13 and a small displacement 14.
- Each displacement 13, 14 is connected via a connected to him supply and discharge line 15 and 16 for the fluid to the load terminals of a control valve 20, wherein the control valve 20 is further associated with a tank 17 and a pump 18.
- four standard ports P, A, B, T are formed on the valve housing 21 of the control valve 20, the port P to the pump 18, the port A via the supply and discharge line 15 with the large displacement 13 of the working cylinder 10 and the port B is connected via the supply and discharge line 16 with the small displacement 14 of the working cylinder 10.
- the tank connection T is assigned to the tank 17.
- each annular spaces are assigned to the individual, the aforementioned housing connections, namely an annular space 22 for the terminal P, an annular space 23 for the terminal A, an annular space 24 for the terminal B and an annular space 25 for the terminal T.
- a control piston 26 is displaceable having two piston collars 27, wherein 27 recesses 28 and 28a are milled out between the piston collars 27 and on the outside of a j eden piston collar.
- the two piston collars 27 block off the consumer connections A and B.
- control spaces 46 are respectively formed at the two ends of the control piston 26 in the valve housing 21, which are connected via a pilot control line 47 formed in the valve housing 21 to a pilot control (not shown) connected to the control valve 20.
- pilot control (not shown) connected to the control valve 20.
- springs 45 are arranged, which fix the control piston 26 at a prevailing in the control chambers 46 pressure of zero bar in its center position.
- a displacement measuring system 48 is connected.
- control piston 26 By introducing appropriate control oil into one of the two control chambers 46, the control piston 26 can in each case be displaced in the valve housing 21 in both directions, so that the piston collars 27 formed on the control piston 26 each have the housing connections P via the recesses 28 or 28a therebetween , A, B, T in terms of the desired valve function.
- an additional, fifth annular channel V is formed, which is connected via an opening formed in the valve housing 21 internal bridge 30 with the terminal A associated annular space 23.
- the control piston 26 is offset from the position shown in Figure 1 to the right, so that the connection from P to B opened and at the same time the connection from B to V through the right annular collar 27 is locked. Since at the same time the connection from P to A is blocked by the left annular collar 27, the pump 18 now conveys via the connection P - B in the small displacement 14 of the working cylinder 10 and provides for a method of the piston 1 1 to the left.
- connection from A to T through the left outer recess 28 in Control piston 26 is released, so that the displaced during the return stroke of the piston 1 1 from the large displacement 13 fluid via the supply and discharge line 15, the port A, the recess 28 and the port T to the tank 17 can flow.
- the connection opening from A to T recess 28 at least twice the size of the other, formed on the control piston 26 recesses 28a.
- FIG. 2 shows a further development of the control valve described above with reference to FIG. 1, in which now a switchover possibility from the so-called rapid traverse of the working cylinder with faster ejection movement of the piston rod 12 to a state with high holding force is possible.
- the small displacement 14 of the working cylinder 10 must be relieved by switching to the tank 17 so that no pressure is present in the small displacement 14 of the working cylinder 10.
- the control valve 20 shown in Figure 1 is further developed to the effect that the internal bridge 30 is continued in the direction of the tank port T associated annular space 25 and outgoing therefrom a connection bore 40 to the terminal A associated annular space 23.
- the internal bridge 30 has a section 41 located downstream of the connection bore 40 and leading to the tank connection T associated annular space 25.
- a check valve 42 is turned on in the connecting bore 40 in the interior of the valve housing 21, which has a direction of passage directed towards the port A.
- a preferably electrically actuated shut-off valve 43 is switched by means of which the coming of the annular channel V connection to terminal T is shut off or apparently.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Fluid-Pressure Circuits (AREA)
- Actuator (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200810059436 DE102008059436B3 (de) | 2008-11-27 | 2008-11-27 | Hydraulisches Steuerventil für einen einseitig arbeitenden Differentialzylinder |
PCT/EP2009/008171 WO2010060553A1 (de) | 2008-11-27 | 2009-11-17 | Hydraulisches steuerventil für einen einseitig arbeitenden differentialzylinder |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2350461A1 true EP2350461A1 (de) | 2011-08-03 |
EP2350461B1 EP2350461B1 (de) | 2013-01-16 |
Family
ID=41396974
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP09759882A Active EP2350461B1 (de) | 2008-11-27 | 2009-11-17 | Hydraulisches steuerventil für einen einseitig arbeitenden differentialzylinder |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP2350461B1 (de) |
DE (1) | DE102008059436B3 (de) |
WO (1) | WO2010060553A1 (de) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102010006983B4 (de) | 2010-02-05 | 2012-10-11 | Parker Hannifin Gmbh | Hydraulisches Steuerventil für einen einseitig arbeitenden Differentialzylinder mit fünf Gehäuseanschlüssen |
DE102010009085B3 (de) * | 2010-02-24 | 2011-03-10 | Parker Hannifin Gmbh | Hydraulisches Steuerventil für einen einseitig arbeitenden Differentialzylinder mit fünf Steuerkanten |
DE102010022952B4 (de) | 2010-06-08 | 2012-12-06 | Parker Hannifin Gmbh | Hydraulisches Antriebssystem für einen Aktuator |
DE102011008145B3 (de) | 2011-01-08 | 2012-02-02 | Parker Hannifin Gmbh | Energieeffizienter hydraulischer Antrieb für die Linearbewegung eines Massekörpers |
US9273664B2 (en) * | 2011-02-18 | 2016-03-01 | Parker Hannifin Corporation | Hydraulic control valve for a one-sided operating differential cylinder having five control edges |
DE102011053230B3 (de) * | 2011-09-02 | 2013-01-31 | Parker Hannifin Manufacturing Germany GmbH & Co. KG | Linear arbeitender Massekörperantrieb mit Energierückgewinnung |
DE102011054616B3 (de) * | 2011-10-19 | 2013-02-07 | Parker Hannifin Manufacturing Germany GmbH & Co. KG | Hydraulisch angetriebene Anordnung zum linearen Bewegen eines Massekörpers |
DE102012101120B4 (de) | 2012-02-14 | 2013-08-22 | Parker Hannifin Manufacturing Germany GmbH & Co. KG | Hydraulisch angetriebene Anordnung zum linearen Bewegen eines Massekörpers |
DE102012107699B3 (de) * | 2012-08-22 | 2014-01-02 | Parker Hannifin Manufacturing Germany GmbH & Co. KG | Massekörperantrieb mit hydraulischer Energierückgewinnungsschaltung |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3633461A (en) * | 1968-04-27 | 1972-01-11 | Komatsu Mfg Co Ltd | Hydraulic circuitry for the hoist ram and the like of the building machinery |
DE3000260A1 (de) * | 1980-01-05 | 1981-07-09 | Konrad Dipl Ing Meyer | Einrichtung zur steuerung eines differentialzylinders |
WO1998001678A1 (de) * | 1996-07-05 | 1998-01-15 | Parker Hannifin Gmbh | Steuereinrichtung für einen einseitig arbeitenden arbeitszylinder |
US6116142A (en) * | 1996-07-05 | 2000-09-12 | Parker Hannifin Gmbh | Controller for a fluid cylinder |
DE10055419A1 (de) * | 2000-11-09 | 2002-05-29 | Bosch Gmbh Robert | Ventilblock |
-
2008
- 2008-11-27 DE DE200810059436 patent/DE102008059436B3/de active Active
-
2009
- 2009-11-17 EP EP09759882A patent/EP2350461B1/de active Active
- 2009-11-17 WO PCT/EP2009/008171 patent/WO2010060553A1/de active Application Filing
Non-Patent Citations (1)
Title |
---|
See references of WO2010060553A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO2010060553A1 (de) | 2010-06-03 |
DE102008059436B3 (de) | 2010-01-07 |
EP2350461B1 (de) | 2013-01-16 |
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