EP0110876B1 - Verfahren und vorrichtung zur steuerung eines hydraulischen schlagzylinders - Google Patents

Verfahren und vorrichtung zur steuerung eines hydraulischen schlagzylinders Download PDF

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Publication number
EP0110876B1
EP0110876B1 EP82901863A EP82901863A EP0110876B1 EP 0110876 B1 EP0110876 B1 EP 0110876B1 EP 82901863 A EP82901863 A EP 82901863A EP 82901863 A EP82901863 A EP 82901863A EP 0110876 B1 EP0110876 B1 EP 0110876B1
Authority
EP
European Patent Office
Prior art keywords
pressure
ram
lifting
chamber
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.)
Expired
Application number
EP82901863A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0110876A1 (de
Inventor
Gavril Axinti
Stefanica Arama
Ionel Draghici
Polidor Bratu
Corneliu Stanciu
Aurelian Ghinea
Florin Badulescu
Christian Diaconu
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
INTREPRINDEREA DE UTILAJ GREU 'PROGRESUL'
Original Assignee
INTREPRINDEREA DE UTILAJ GREU 'PROGRESUL'
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Publication date
Application filed by INTREPRINDEREA DE UTILAJ GREU 'PROGRESUL' filed Critical INTREPRINDEREA DE UTILAJ GREU 'PROGRESUL'
Publication of EP0110876A1 publication Critical patent/EP0110876A1/de
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Publication of EP0110876B1 publication Critical patent/EP0110876B1/de
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
    • B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
    • B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
    • B06B1/18—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency wherein the vibrator is actuated by pressure fluid
    • B06B1/183—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency wherein the vibrator is actuated by pressure fluid operating with reciprocating masses

Definitions

  • the invention relates to a method and a device for controlling the cyclical movement of a percussion piston in a hydraulic percussion cylinder according to the preamble of patent claim 1 and the preamble of patent claim 2.
  • the invention is based on the object of developing the above-mentioned method and the above-mentioned device in such a way that the control can be easily adapted to different working conditions.
  • this object is achieved on the process side by the features characterized in patent claim 1 and on the device side by the features characterized in patent claim 2.
  • the cyclic movement of the percussion piston in a hydraulic percussion cylinder is controlled as a function of the pressure of a working memory, the pump or supply pressure and a functionally appropriate control of the valves provided for the lifting and lowering phase.
  • the functional parameters be easily adapted to different working conditions, but also high impact frequencies can be achieved because the control of the impact piston no longer depends on the position of the impact piston in the hydraulic impact cylinder and the position of an associated control slide, but directly depends on the pressures that are present in the pressure medium circuits of the hydraulic impact cylinder.
  • intermediate and limit pressures are used in a favorable manner, which depend on the pressure of the pump and the pressure of the pressure accumulator, with the pressure in the pressure accumulator being stored in the accumulator filling phase until the end of the braking phase, in addition to the pressure of the pump, advantageously for lowering the percussion piston is exploited.
  • the drawing shows the schematic representation of a device for controlling the cyclical movement of a percussion piston 1 in a hydraulic percussion cylinder 2.
  • the percussion piston 1 consists of a cylindrical section which is delimited by a return stroke surface a and by a first working surface e. Cylinder sections with different smaller diameters are formed on the return stroke surface a and on the first work surface b. The return stroke area a is smaller than the working area b.
  • the cylinder formed on the first work surface b ends in a second work surface c. Above the working surface c, a storage chamber d is formed in the striking cylinder 2, which is delimited by the second working surface c of the striking piston 1.
  • the first working surface b of the percussion piston delimits a working chamber b formed with the hydraulic percussion cylinder 2, and the return stroke area a delimits a lifting chamber f formed in the percussion cylinder 2.
  • the percussion piston 1 is shown for the sake of simplicity with a lateral distance between its cylinder surfaces and the percussion cylinder 2.
  • a pump 3 is connected to a controllable valve 4 and a controllable valve 8 via a pressure medium line.
  • the pump 3 delivers pressure medium from a pressure medium container 6.
  • a return line opens into the pressure medium container 6 and is connected to a controlled valve 7, which is provided for relieving the pressure in the working chamber e via a line h, a check valve 9, a controlled valve 11 , which is provided via a line e for pressure relief of the lifting chamber f, and with a pressure accumulator 12.
  • the controlled valve 8 is also connected to a pressure accumulator 5 and a further controlled valve 10, through which the working chamber e can be pressurized via the line h.
  • a line g opening into the storage chamber d is connected to the pressure accumulator 5, the controlled valve 8 and the controlled valve 10.
  • a hydraulic control device 13 is connected to the controlled valves 4, 7, 8, 10 and 11 via schematically illustrated control lines and has a schematically illustrated signal input for the pressure of the pressure accumulator 5.
  • the hydraulic control device 13, the controlled valves 4, 7, 8, 10 and 11, the non-return valve 9 and the lines connecting the elements mentioned are installed in a component 14 which connects to the housing of the impact cylinder 2 via lines i, h and g are connected.
  • the connection between the pump 3 and the component 14 is established by a flexible line 16, while a flexible line 17 is provided for the return from the component 14 and the pressure accumulator 12. Also shown is a part of a tool 18 protruding into a housing of the percussion cylinder 2, on which the percussion piston 1 acts.
  • the method according to the invention for controlling the cyclical movement of the percussion piston 1 in the hydraulic percussion cylinder 2 results from the subsequent description of the Mode of action.
  • the valves 8, 10 and 11 designed as open-close valves are closed by the hydraulic control device.
  • the lifting chamber f is pressurized by the pressure line i with the pressure of the pump 3, while the working chamber e is relieved of pressure via the line h and the open valve 7 to the container 6.
  • the hydraulic control device 13 Before the percussion piston 1 has carried out the entire stroke in the percussion cylinder 2, a predetermined pressure is reached in the pressure accumulator 5, which pressure is sensed by the hydraulic control device 13. The hydraulic control device 13 then closes the valve 4 and opens the valve 8. As a result, further pressure medium is fed into the pressure accumulator 5 and the percussion piston 1 is braked. In order to secure the filling of the lifting chamber f, the check valve 9, which is connected to the container 6, is used in this last phase.
  • the pump 3 continues to deliver pressure medium into the accumulator 5 until a predetermined maximum pressure for the accumulator 5 is reached.
  • This pressure is also sensed by the hydraulic control device 13.
  • the working phase of the percussion piston 1 begins, the valves 7 and 4 being closed by the hydraulic control device and the working chamber e and the storage chamber d being acted upon by the pressure of the pressure accumulator 5 and by the pressure of the pump 3, while the lifting chamber f is relieved of pressure via the valve 11 in the container 6.
  • the pressure accumulator 12 is provided in the return circuit.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Earth Drilling (AREA)
EP82901863A 1982-06-08 1982-06-08 Verfahren und vorrichtung zur steuerung eines hydraulischen schlagzylinders Expired EP0110876B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/RO1982/000003 WO1983004427A1 (en) 1982-06-08 1982-06-08 Control device and method for hydraulic pulse generators

Publications (2)

Publication Number Publication Date
EP0110876A1 EP0110876A1 (de) 1984-06-20
EP0110876B1 true EP0110876B1 (de) 1987-10-07

Family

ID=20094874

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82901863A Expired EP0110876B1 (de) 1982-06-08 1982-06-08 Verfahren und vorrichtung zur steuerung eines hydraulischen schlagzylinders

Country Status (5)

Country Link
US (1) US4688468A (fi)
EP (1) EP0110876B1 (fi)
DE (1) DE3277448D1 (fi)
FI (1) FI77724C (fi)
WO (1) WO1983004427A1 (fi)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3226468A1 (de) * 1982-07-15 1984-01-19 Horst Ing.(grad.) 4005 Meerbusch Knäbel Vorrichtung zum erzeugen einer arbeitskraft, insbesondere fuer rammen, pressen und dgl.
US4879875A (en) * 1988-03-22 1989-11-14 The Boeing Company Fastener driving tool
US5018431A (en) * 1988-12-09 1991-05-28 Quadrastat Corporation Apparatus for positioning a work implement
US5347448A (en) * 1992-11-25 1994-09-13 Samsung Heavy Industries Co., Ltd. Multiprocessor system for hydraulic excavator
FI116124B (fi) * 2004-02-23 2005-09-30 Sandvik Tamrock Oy Painenestekäyttöinen iskulaite
SE528649C8 (sv) * 2005-05-23 2007-02-27 Atlas Copco Rock Drills Ab Impulsgenerator, hydrauliskt impulsverktyg och förfarande för att alstra impulser

Family Cites Families (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1143648A (fi) *
US1626087A (en) * 1925-04-23 1927-04-26 Charles A Hultquist Fluid-operated percussive tool
US2550723A (en) * 1946-11-29 1951-05-01 Frank A Best Reversing valve mechanism
US2699120A (en) * 1950-05-26 1955-01-11 Stewart Warner Corp Valve mechanism for reciprocating fluid operated motors
US2842938A (en) * 1955-02-10 1958-07-15 Research Corp Air supply control for air hammer
US3035548A (en) * 1959-11-24 1962-05-22 Ingbuero Dipl Ing Friedrich He Hydraulically operated percussion devices
US3298447A (en) * 1964-04-15 1967-01-17 Raymond Int Inc Control of variable-stroke power hammers
GB1178102A (en) * 1966-04-15 1970-01-21 Nat Res Dev Fluid Power Transmission Apparatus
DE1298753B (de) * 1967-01-17 1969-07-03 Koeppern & Co Kg Maschf Hydraulischer Vibrationsantrieb mit einem Schubkolbentrieb
DE1299922B (de) * 1967-01-17 1969-07-24 Koeppern & Co Kg Maschf Hydraulischer Vibrationsantrieb mit einem Schubkolbentrieb
US3608650A (en) * 1968-11-30 1971-09-28 Saburo Matsusaka Impact cylinder apparatus
CA994640A (en) * 1972-08-31 1976-08-10 John V. Bouyoucos Hydroacoustic oscillator
DE2301607A1 (de) * 1973-01-13 1974-07-18 Bosch Gmbh Robert Hydraulische steuereinrichtung
US4002103A (en) * 1974-07-01 1977-01-11 The West Company Reciprocating apparatus with a controllable dwell time at each end of the stroke
US3969987A (en) * 1974-11-11 1976-07-20 Hydroacoustics Inc. Hydroacoustic apparatus and valving mechanisms for use therein
GB1542402A (en) * 1975-07-07 1979-03-21 Smiths Industries Ltd Fluid pressure supply apparatus
FR2330889A1 (fr) * 1975-11-06 1977-06-03 Renault Charge d'un accumulateur par un moteur thermique
JPS5314272A (en) * 1976-07-27 1978-02-08 Nissan Motor Co Ltd Oil pressure generator for vehicles
US4275793A (en) * 1977-02-14 1981-06-30 Ingersoll-Rand Company Automatic control system for rock drills
US4142445A (en) * 1977-03-17 1979-03-06 Caterpillar Tractor Co. Crossover plural circuit fluid system
US4314612A (en) * 1978-07-20 1982-02-09 Battelle Development Corporation Hydraulic linear impact tool
DE2917830A1 (de) * 1979-05-03 1980-11-06 Tuenkers Maschinenbau Gmbh Hydraulischer impulsvibrationsbaer
FI72908C (fi) * 1979-06-29 1987-08-10 Rammer Oy Hydraulisk slagmaskin.
DE3037460A1 (de) * 1980-10-03 1982-05-06 Alfred Teves Gmbh, 6000 Frankfurt Fahrzeugbremsanlage mit hydraulischem bremsverstaerker
US4425835A (en) * 1981-01-26 1984-01-17 Ingersoll-Rand Company Fluid actuator

Also Published As

Publication number Publication date
FI77724C (fi) 1989-04-10
US4688468A (en) 1987-08-25
EP0110876A1 (de) 1984-06-20
FI840477A0 (fi) 1984-02-06
FI840477A (fi) 1984-02-06
DE3277448D1 (en) 1987-11-12
WO1983004427A1 (en) 1983-12-22
FI77724B (fi) 1988-12-30

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