DE3419689C2 - Device for supplying pressure medium to a hydraulic cylinder - Google Patents
Device for supplying pressure medium to a hydraulic cylinderInfo
- Publication number
- DE3419689C2 DE3419689C2 DE19843419689 DE3419689A DE3419689C2 DE 3419689 C2 DE3419689 C2 DE 3419689C2 DE 19843419689 DE19843419689 DE 19843419689 DE 3419689 A DE3419689 A DE 3419689A DE 3419689 C2 DE3419689 C2 DE 3419689C2
- Authority
- DE
- Germany
- Prior art keywords
- pressure
- valve
- proportional
- low
- hydraulic 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.)
- Expired
Links
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
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/08—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor
-
- 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
- F15B2211/20576—Systems with pumps with multiple pumps
- F15B2211/20592—Combinations of pumps for supplying high and low pressure
-
- 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
- F15B2211/30—Directional control
- F15B2211/305—Directional control characterised by the type of valves
- F15B2211/30505—Non-return valves, i.e. check 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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/30—Directional control
- F15B2211/305—Directional control characterised by the type of valves
- F15B2211/30525—Directional control valves, e.g. 4/3-directional control valve
-
- 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
- F15B2211/30—Directional control
- F15B2211/315—Directional control characterised by the connections of the valve or valves in the circuit
- F15B2211/31523—Directional control characterised by the connections of the valve or valves in the circuit being connected to a pressure source and an output member
- F15B2211/31529—Directional control characterised by the connections of the valve or valves in the circuit being connected to a pressure source and an output member having a single pressure source and a single output member
-
- 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
- F15B2211/40—Flow control
- F15B2211/405—Flow control characterised by the type of flow control means or valve
- F15B2211/40507—Flow control characterised by the type of flow control means or valve with constant throttles or orifices
-
- 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
- F15B2211/40—Flow control
- F15B2211/415—Flow control characterised by the connections of the flow control means in the circuit
- F15B2211/41509—Flow control characterised by the connections of the flow control means in the circuit being connected to a pressure source and a directional control valve
-
- 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
- F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
- F15B2211/775—Combined control, e.g. control of speed and force for providing a high speed approach stroke with low force followed by a low speed working stroke with high force, e.g. for a hydraulic press
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
Bei Maschinen mit großen Druckunterschieden zwischen dem Arbeitsvorschub und der Eilgangbewegung ist eine Zweikreissteuerung mit einer Hochdruckpumpe und einer Niederdruckpumpe vorgesehen. Das Umschalten von Arbeitsvorschub auf Eilgangsbewegung bzw. umgekehrt erfolgt durch ein Proportional-Wegeventil, das ständig an die Hochdruck- und Niederdruckleitung über eine Drossel bzw. ein Rückschlagventil angeschlossen ist. Dadurch läßt sich der Aufwand wesentlich verringern.For machines with large pressure differences between the working feed rate and the rapid traverse movement, a two-circuit control with a high-pressure pump and a low-pressure pump is provided. The switching from working feed to rapid traverse movement or vice versa is carried out by a proportional directional control valve that is constantly connected to the high-pressure and low-pressure lines via a throttle or a non-return valve. This can significantly reduce the effort.
Claims (1)
til gesperrt und das andere Wegeventil in Schaltstellung 40 Soll nun der Arbeitsvorschub mit hohem Druck erfolgebracht werden, wobei sich das unter Hochdruck ste- gen, so wird das Proportionalventil 15 so angesteuert, hende Druckmittel mit einem Expansionsschlag in die daß sich der Durchflußquerschnitt durch das Proportiovorher mit Niederdruck beaufschlagte Rohrleitung zum nalventil auf Vorschubgeschwindigkeit, nämlich auf den Hydrozylinder entspannt. Dies führt zu starken Schwin- Querschnitt der Drossel 16 verkleinert. Damit baut sich gungen der Maschine, zu extremer Belastung der Rohr- 45 am P-Anschluß des Proportionalventils 15 der Hochleitungen und einer erheblichen Geräuschbelästigung. druck HD auf, der dem Hydrozylinder 10 zur VerfügungMulti-way valve connected to the high pressure pump - If the rapid traverse movement is to take place, the Prosen. The direction of movement portional valve is opened by the multi-way valve. The high pressure at the P-Antung of the hydraulic cylinder is controlled, while the circuit is slowly reduced via the valve to the hydraulic cycle speed for the working feed or the fastener 10. Then pressure medium flows via the return movement via adjustable throttles between the check valve 17 from the low pressure line ND, and from the respective directional control valve and the hydraulic cylinder. The high pressure line HD is selected via the throttle 16 to the Hy. Apart from the relatively large cylinder 10, which therefore has to perform the equipment effort at low pressure in order to switch over the rapid traverse movement. The high pressure is reduced to the movement on the working feed the one Wegeven- throttle 16 to the level of the low pressure
til blocked and the other directional valve in switching position 40. If the working feed is now to be carried out at high pressure, which is under high pressure, then the proportional valve 15 is controlled so that the pressure medium flows into the pressure medium with an expansion stroke so that the flow cross-section through the proportional advance with low pressure applied pipeline to the nalventil to feed speed, namely relaxed on the hydraulic cylinder. This leads to strong Schwin cross-section of the throttle 16 is reduced. This builds up conditions in the machine, extreme stress on the pipe 45 at the P connection of the proportional valve 15 of the high lines and considerable noise pollution. pressure HD , which the hydraulic cylinder 10 is available
Vorrichtung der eingangs geschilderten Art so auszubil- Es ist leicht erkennbar, daß die Einstellung des Proden, daß ein weiches Umschalten von Eilgang auf Ar- portionalventils auf den jeweiligen, für den Eilgang und beitsvorschub ermöglicht und der Geräteaufwand ver- 50 den Arbeitsvorschub erforderlichen Durchflußquerringert ist. schnitt einen weichen Übergang von Nieder- auf Hoch-Erfindungsgemäß ist diese Aufgabe durch die im druck ermöglicht, so daß starke plötzliche Druckunterkennzeichnenden Teil des Patentanspruchs angeführten schiede vermieden sind. Auch der Geräteaufwand ist Merkmale gelöst. erheblich verringert.The invention is therefore based on the object that is what this executes the work feed.
Apparatus of the type described at the outset can be easily seen that the setting of the prode enables a smooth switch from rapid traverse to proportional valve to the respective flow rate required for rapid traverse and working advance and reduces the amount of equipment required to reduce the work rate . cut a smooth transition from low to high. According to the invention, this task is made possible by the differences in pressure, so that strong sudden pressure sub-characterizing part of the claim is avoided. The complexity of the equipment is also solved. considerably reduced.
Springer-Verlag, 1963, S. 325, Abb. 392) arbeitet dagegen nur mit einer Drucksteuerung. Dazu besitzt sie
Drucksteuerventile und einen Druckschalter. Die Be- 65
aufschlagung des Verbrauchers erfolgt über ein Vier-Wege-Schaltventil. Schon von diesem Aufbau her ist
eine Mengensteuerung weder möglich noch beabsich-A well-known pipe testing system (H. Zoebl, Vienna,
Springer-Verlag, 1963, p. 325, Fig. 392), on the other hand, only works with one pressure control. In addition, she owns
Pressure control valves and a pressure switch. The 65
the consumer is charged via a four-way switching valve. Already from this structure
a quantity control neither possible nor intended
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19843419689 DE3419689C2 (en) | 1984-05-25 | 1984-05-25 | Device for supplying pressure medium to a hydraulic cylinder |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19843419689 DE3419689C2 (en) | 1984-05-25 | 1984-05-25 | Device for supplying pressure medium to a hydraulic cylinder |
Publications (2)
Publication Number | Publication Date |
---|---|
DE3419689A1 DE3419689A1 (en) | 1985-11-28 |
DE3419689C2 true DE3419689C2 (en) | 1986-11-27 |
Family
ID=6236924
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19843419689 Expired DE3419689C2 (en) | 1984-05-25 | 1984-05-25 | Device for supplying pressure medium to a hydraulic cylinder |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE3419689C2 (en) |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2021182C3 (en) * | 1970-04-30 | 1978-03-30 | Maschinenfabrik Weingarten Ag, 7987 Weingarten | Device for setting the plunger speeds and pressures in die-casting machines with a three-phase system, especially in cold-chamber die-casting machines |
FR2271429B1 (en) * | 1974-05-16 | 1978-03-31 | Poclain Sa | |
DE2747548C2 (en) * | 1977-10-22 | 1986-04-17 | Thyssen Industrie Ag, 4300 Essen | Press with control circuit |
DE2809387A1 (en) * | 1978-03-04 | 1980-01-17 | Thyssen Industrie | HYDRAULIC CUTTING, BURRING OR THE LIKE. -PRESS WITH HIGHLY CHANGE MOVEMENT RESISTANCE OF THE PRESS SLIDE DURING THE SLIDE PATH |
DE2919206A1 (en) * | 1979-05-12 | 1980-11-20 | Bosch Gmbh Robert | DEVICE FOR CONTROLLING A HYDRAULIC CONSUMER |
PL126538B1 (en) * | 1979-11-15 | 1983-08-31 | Politechnika Krakowska | Pulsatory press hydraulic supply system |
DE3235954C2 (en) * | 1982-09-29 | 1986-02-13 | Mannesmann Rexroth GmbH, 8770 Lohr | Device for controlling the rapid traverse and the feed of a pressure-medium-operated machine tool slide |
-
1984
- 1984-05-25 DE DE19843419689 patent/DE3419689C2/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
DE3419689A1 (en) | 1985-11-28 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE19650798B4 (en) | Directional valve with variable recovery for construction vehicles | |
DE2419311A1 (en) | HIGH SPEED VALVE | |
DE2436942A1 (en) | CONTROL DEVICE FOR A HYDRAULIC CLAMPING DEVICE | |
DE3219730C2 (en) | ||
DE2330943C3 (en) | Electromagnetically operated hydraulic switch | |
DE2652815A1 (en) | HYDRAULIC STEERING DEVICE | |
DE3340676C2 (en) | ||
DE3216580C2 (en) | ||
DE1804523A1 (en) | Electro-hydraulic servo system | |
EP0735275B1 (en) | Snap-in locking device | |
DE3419689C2 (en) | Device for supplying pressure medium to a hydraulic cylinder | |
DE2218472A1 (en) | HYDROSTATIC TRANSMISSION | |
DE2647140A1 (en) | Non-reversing hydraulic valve system - has slider with two pistons for load control and has return line | |
DE3243182C2 (en) | ||
DE102004005402B4 (en) | Valve arrangement for lifting and lowering a lifting cylinder | |
DE1273941B (en) | Control valve | |
DE3640640C2 (en) | Hydrostatic drive system with a consumer with two connections | |
DE3447380C2 (en) | ||
DE202004003749U1 (en) | Electrohydraulic control device | |
DE4244515C2 (en) | Circuit for intermittently working, hydraulically driven machines, such as loading machines, lowering machines, drilling trucks or the like | |
DE19503701A1 (en) | Device for operating hydraulic cylinders of shield structure used in mining | |
DE2845922A1 (en) | Pilot-operated distributor valve for hydraulic circuit - uses pilot control valve actuated by pump pressure to shift valve from neutral position | |
DE2319311C3 (en) | Hydraulic control valve device for a double-acting hydraulic servomotor, in particular for controlling the working fluid of hydraulic cylinders in face support in mining | |
DE862097C (en) | Fluid gear for steering systems of ships or the like. | |
DE2737856A1 (en) | Hydraulic ram retraction prevention equipment - has sprung non-return valve in control pipe to changeover valve closing upon pipe fracture |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
OP8 | Request for examination as to paragraph 44 patent law | ||
D2 | Grant after examination | ||
8363 | Opposition against the patent | ||
8365 | Fully valid after opposition proceedings | ||
8339 | Ceased/non-payment of the annual fee |