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WO1997016372A1 - Procede permettant, dans un systeme a fluide de pression, d'employer et de commander une fleche de levage, en particulier en combinaison avec un engin de chantier - Google Patents

Procede permettant, dans un systeme a fluide de pression, d'employer et de commander une fleche de levage, en particulier en combinaison avec un engin de chantier Download PDF

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Publication number
WO1997016372A1
WO1997016372A1 PCT/FI1996/000559 FI9600559W WO9716372A1 WO 1997016372 A1 WO1997016372 A1 WO 1997016372A1 FI 9600559 W FI9600559 W FI 9600559W WO 9716372 A1 WO9716372 A1 WO 9716372A1
Authority
WO
WIPO (PCT)
Prior art keywords
cylinder
boom
pressure chamber
actuator
piston mechanism
Prior art date
Application number
PCT/FI1996/000559
Other languages
English (en)
Finnish (fi)
Inventor
Sakari PINOMÄKI
Original Assignee
Pinomaeki Sakari
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Pinomaeki Sakari filed Critical Pinomaeki Sakari
Priority to DE19681624T priority Critical patent/DE19681624B4/de
Priority to CA002231498A priority patent/CA2231498C/fr
Publication of WO1997016372A1 publication Critical patent/WO1997016372A1/fr
Priority to FI980558A priority patent/FI122922B/fi
Priority to SE9801290A priority patent/SE525907C2/sv

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
    • F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
    • 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
    • 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
    • F15B11/04—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed
    • F15B11/044—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed by means in the return line, i.e. "meter out"
    • F15B11/0445—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed by means in the return line, i.e. "meter out" with counterbalance valves, e.g. to prevent overrunning or for braking
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C13/00—Other constructional features or details
    • B66C13/18—Control systems or devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/06—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes with jibs mounted for jibbing or luffing movements
    • B66C23/08—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes with jibs mounted for jibbing or luffing movements and adapted to move the loads in predetermined paths
    • B66C23/10—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes with jibs mounted for jibbing or luffing movements and adapted to move the loads in predetermined paths the paths being substantially horizontal; Level-luffing jib-cranes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/54—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes with pneumatic or hydraulic motors, e.g. for actuating jib-cranes on tractors
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
    • E02F3/30—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets with a dipper-arm pivoted on a cantilever beam, i.e. boom
    • E02F3/301—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets with a dipper-arm pivoted on a cantilever beam, i.e. boom with more than two arms (boom included), e.g. two-part boom with additional dipper-arm
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
    • E02F3/36—Component parts
    • E02F3/42—Drives for dippers, buckets, dipper-arms or bucket-arms
    • E02F3/43—Control of dipper or bucket position; Control of sequence of drive operations
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
    • E02F3/36—Component parts
    • E02F3/42—Drives for dippers, buckets, dipper-arms or bucket-arms
    • E02F3/43—Control of dipper or bucket position; Control of sequence of drive operations
    • E02F3/435—Control of dipper or bucket position; Control of sequence of drive operations for dipper-arms, backhoes or the like
    • E02F3/436—Control of dipper or bucket position; Control of sequence of drive operations for dipper-arms, backhoes or the like for keeping the dipper in the horizontal position, e.g. self-levelling
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E02F9/22—Hydraulic or pneumatic drives
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E02F9/22—Hydraulic or pneumatic drives
    • E02F9/2203—Arrangements for controlling the attitude of actuators, e.g. speed, floating function
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E02F9/22—Hydraulic or pneumatic drives
    • E02F9/2221—Control of flow rate; Load sensing arrangements
    • E02F9/2225—Control of flow rate; Load sensing arrangements using pressure-compensating valves
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E02F9/22—Hydraulic or pneumatic drives
    • E02F9/2221—Control of flow rate; Load sensing arrangements
    • E02F9/2225—Control of flow rate; Load sensing arrangements using pressure-compensating valves
    • E02F9/2228—Control of flow rate; Load sensing arrangements using pressure-compensating valves including an electronic controller
    • 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
    • F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
    • F15B11/20—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors controlling several interacting or sequentially-operating members
    • F15B11/205—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors controlling several interacting or sequentially-operating members the position of the actuator controlling the fluid flow to the subsequent 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
    • 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
    • F15B13/06—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors
    • 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
    • F15B2211/3056—Assemblies of multiple valves
    • F15B2211/30565—Assemblies of multiple valves having multiple valves for a single output member, e.g. for creating higher valve function by use of multiple valves like two 2/2-valves replacing a 5/3-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
    • F15B2211/31—Directional control characterised by the positions of the valve element
    • F15B2211/3105—Neutral or centre positions
    • F15B2211/3116—Neutral or centre positions the pump port being open in the centre position, e.g. so-called open centre
    • 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
    • F15B2211/50—Pressure control
    • F15B2211/505—Pressure control characterised by the type of pressure control means
    • F15B2211/50509—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means
    • F15B2211/50545—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means using braking valves to maintain a back 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
    • F15B2211/50—Pressure control
    • F15B2211/505—Pressure control characterised by the type of pressure control means
    • F15B2211/50563—Pressure control characterised by the type of pressure control means the pressure control means controlling a differential pressure
    • F15B2211/50581—Pressure control characterised by the type of pressure control means the pressure control means controlling a differential pressure using counterbalance valves
    • F15B2211/5059—Pressure control characterised by the type of pressure control means the pressure control means controlling a differential pressure using counterbalance valves using double counterbalance 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
    • F15B2211/60—Circuit components or control therefor
    • F15B2211/615—Filtering means
    • 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
    • F15B2211/705—Output members, e.g. hydraulic motors or cylinders or control therefor characterised by the type of output members or actuators
    • F15B2211/7051—Linear output members
    • F15B2211/7053—Double-acting output members
    • 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
    • F15B2211/71—Multiple output members, e.g. multiple hydraulic motors or cylinders
    • F15B2211/7114—Multiple output members, e.g. multiple hydraulic motors or cylinders with direct connection between the chambers of different actuators
    • F15B2211/7121—Multiple output members, e.g. multiple hydraulic motors or cylinders with direct connection between the chambers of different actuators the chambers being connected in series

Definitions

  • the invention relates to a system as set forth in the preamble of Claim 1, which is particularly intended for use in combination with a system using pressurized medium for employing and controlling a hoisting boom assembly.
  • a lifting or hoisting boom assembly for applying the method of the invention typically comprises a substantially vertical main boom and an intermediate boom pivotally mounted on the main boom. Further, a terminal boom is pivotally mounted on this intermediate boom, whereby a load, a working machine or the like can be fixed to the intermediate boom to be moved by the hoisting boom assembly.
  • Such a hydraulic hoisting boom assembly is operated with two cylinder-piston mechanisms wherein the first cylinder-piston mechanism connecting the main boom to the intermediate boom is used for effecting a movement substantially in the vertical direction, and a substantially horizontal movement is effected in a corresponding manner by using the second cylinder-piston mechanism connecting the intermediate boom to the terminal boom in association with the first cylinder-piston mechanism.
  • a cylinder- piston mechanism is controlled using a control unit provided with separate operating valves via a hydraulic medium pressurized in a pressure unit and conveyed by independent primary and secondary lines connected to the operating valves.
  • a hoisting boom assembly of the above-mentioned type is manoeuvred in a way that e.g. when the load is to be moved towards the main boom, the first cylinder-piston mechanism is used for pivoting the intermediate boom upwards and simultaneously the free end of the terminal end is descended with the second cylinder-piston mechanism correspond ⁇ ingly, wherein the manoeuvre is naturally made in reverse order for moving the load away from the main boom.
  • the weight of the load will induce a certain amount of pressure in each cylinder-piston mecha ⁇ nism.
  • no pressure from the pressure unit will be required for controlling the first cylinder-piston mechanism because of the effect of gravity, whereas full pressure will be required for controlling the second cylinder piston mechanism.
  • the purpose of the method of the invention is to provide a decisive improvement to the problems presented above and thus to improve the prior art substantially.
  • the method of the invention is primarily characterized in what will be presented in the characterizing part of the appended Claim 1.
  • the most important general advantages of the method of the invention include its simplicity, reliability and effectiveness. Using the method, it is possible to make even very massive constructions having pressure units and cylinder-piston mechanisms with essentially smaller capaci ⁇ ties than conventional systems. Further, it is possible to reduce the quantity of the pressurized medium to be circulated as much as to the half of the quantity used in current systems. Moreover, particularly in hoisting boom assemblies, the forces and moments directed from the cylinder-piston mechanisms to the hoisting boom assembly are reduced significantly from the present ones; consequently, it is even possible to make the construction of the hoisting boom assembly less complex and less massive, if necessary. Thus, the invention has in this respect also the advantage of significantly better efficiency and output than current methods.
  • Another advantage of the method according to the invention is easier control of the pressurized medium system, wherein the appli ⁇ cation of the method most often does not require controlling two inde ⁇ pendent cylinder-piston mechanisms with separate operating valves. Also, the method of the invention makes it possible to reduce substan- tially problems of cavitation.
  • Fig. 1 shows an advantageous operational chart relating to a pressurized medium system applying the method of the invention
  • Fig. 2 shows an advantageous hoisting boom assembly applying the method and pressurized medium system according to the invention, seen from the side.
  • the invention relates to a method in a pressurized medium system comprising at least two cylinder-piston mechanisms 1 , 2 (later actua ⁇ tors) using a pressurized medium; a pressure unit P, such as one or several pumps for pressurizing the medium; and a control unit V having a valve arrangement 4, 5 for operating said actuators 1 , 2 by conveying pressurized medium to their pressure chambers to be filled in at the time and, in a corresponding manner, by displacing pressurized medium from their pressure chambers to be emptied at the time.
  • the actuators 1 , 2 are coupled to operate in a series so that pressurized medium to be dis ⁇ placed is conveyed from the pressure chamber of one actuator 1 or 2 to be emptied to the pressure chamber of the other actuator 2 or 1 to be filled in.
  • the pressurized medium is returned to the control unit V from the pressure chamber of the second actuator 2 or 1 to be emptied.
  • the method of the invention is advantageously applied, according to the operating principle shown in Figure 1 , in a pressurized medium system having two actuators 1 , 2 which are controlled by two operating valves 4, 5 of the control unit V by means of pressurized medium sup ⁇ plied via a flow arrangement, such as primary 6a, 7a and secondary lines 6b, 7b, connected to the operating valves 4, 5.
  • pressurized medium is con ⁇ veyed by the control unit V, such as the first or second operating valves 4 or 5, to one actuator, such as the first or second pressure cylinder 1 or 2, from which the pressure medium to be displaced is further con ⁇ veyed to the next actuator 2 or 1 and returned to the control unit V.
  • pressurized medium is conveyed by the control unit V, e.g. from the primary port 5A of the second operating valve 5 to the second pressure chamber C2 of the first actuator 1 to be filled up.
  • the pressurized medium is conveyed further from the first pressure chamber C1 of the first actuator 1 to be emptied to the second pressure chamber D2 of the second actuator 2 to be filled up.
  • the pressurized medium is returned from the first pressure chamber D1 of the second actuator 2 to be emptied to the control unit V, e.g. to the secondary port 5B of the second operating valve 5.
  • pressurized medium is conveyed via the control unit V, i.e., from the secondary port 5B of the second operating valve 5, to the first pressure chamber D1 of the second actuator 2 to be filled up, whereafter the pressurized medium is con ⁇ veyed further from the second pressure chamber D2 of the second actuator 2 to be emptied to the first pressure chamber C1 of the first actuator 1 to be filled up.
  • the pressuhzed medium is then returned from the second pressure chamber C2 of the first actuator 1 to be emptied to the control unit V, i.e., to the primary port 5A of the second operating valve 5.
  • Fig. 2 showing a pressurized medium system in connection with a so-called hoisting boom assembly.
  • a hydraulic hoisting boom assembly X is to be placed in connection with a working machine, such as a tractor, a forest harvester or an excavator, and in its operating situation the hoisting boom assembly comprises a sub ⁇ stantially vertical main boom X1 with its lower, first end connected to the working machine and its second end its journalled to the first end of intermediate boom X2 which is further, at its second end, journalled to the first end of terminal boom X3, wherein the second end of the termi ⁇ nal boom X3 is provided with means for fixing a load, working tool or the like to be moved with the hoisting boom assembly.
  • the hoisting boom assembly is preferably operated with two cylinder-piston mecha- nisms 1, 2 (later actuators), wherein the first actuator 1 connecting the main boom X1 and the intermediate boom X2 is used for effecting a movement of the second end of the terminal boom X3 substantially in the vertical direction and, in a corresponding manner, the horizontal movement of the second end of the terminal boom X3 is effected by using the second actuator 2 connecting the intermediate boom X2 to the terminal boom X3 in association with the said first actuator 1.
  • the method of the invention is utilized during simultaneous use of actuators 1 , 2, i.e., for example in horizontal trans ⁇ fers of the end of the hoisting boom assembly, by using the displace- ment energy of the pressurized medium supplied to the actuator 1 for operating the second actuator 2 by coupling the flow channels of the flow arrangement entering them at least partly together as shown in the chart of Fig.
  • pressurized medium is supplied from the primary port 5A of the operating valve 5 to the pressure cham ⁇ ber 02 of the first actuator 1 to be filled up.
  • pressurized medium is removed from the pressure chamber 01 of the first actuator 1 to be emptied to the pressure chamber D2 of the second actuator 2 to be filled up, whereafter the pressurized medium is first returned from the pressure chamber D1 of the second actuator 2 to be emptied to the secondary port 5b of the second operating valve 5
  • the above process corresponds for example to moving a load at the end of the hoisting boom assembly outwards, wherein the intermediate boom X2 pivots downwards and simultaneously pushes the second end of the terminal boom X3 away from the main boom X1.
  • the weight of the load induces a substantially equal pres ⁇ sure on both actuators 1 , 2.
  • suitable actuator volumes for achieving their suitable movement relations particularly in an endeavour to facilitate substantially horizon- tal movements
  • pressurized medium is supplied in a corresponding manner from the secondary port 5B of the second operating valve 5 to the pressure chamber D1 of the second actuator 2 to be filled up.
  • Pressurized medium is removed from the pressure chamber D2 of the second actuator 2 to be emptied, in a cor ⁇ responding manner, to the pressure chamber C1 of the first actuator 1 to be filled up.
  • the hydraulic fluid is returned from the pressure chamber 02 of the first actuator 1 to be emptied to the primary port 5A of the second operating valve 5.
  • the required operating pressure is as low as possible, because the intermediate boom X2 induces a pressure in the actuator 2, thus tending to extend the first actuator 1.
  • the quan ⁇ tity of the oil to be circulated is also in this case one half of that required when using conventional methods.
  • the sole hoisting movement i.e. the pivot ⁇ ing of the intermediate boom X2 upwards
  • the sole hoisting movement can be conducted advanta ⁇ geously by supplying the pressurized medium through the outlet port of the first operating valve 4, i.e., through the primary port 4A, to the first pressure chamber 01 of the first actuator 1 , wherein the second pres ⁇ sure chamber 02 is connected with the return port of the first operating valve, i.e., with the secondary port 4B.
  • the second operating valve 5 is closed, also the first pressure chamber D1 of the second actuator 2 is closed, and this second actuator 2 is prevented from moving although the pressure is effective in its second pressure cham ⁇ ber D2.
  • the sole descending motion i.e., the pivoting of the intermediate boom X2 downwards
  • the sole descending motion is conducted in the reverse order by supplying the pressurized fluid through the secon ⁇ dary port 4B of the first operating valve 4 to the second pressure chamber C2 of the first actuator 1 , wherein, in a corresponding manner, its first pressure chamber 01 is connected with the primary port 4A of the first operating valve.
  • the second operating valve 5 is closed, and the pressure has no effect elsewhere.
  • the operation chart of Fig. 1 also includes, as a conventional embodiment in this context, a so-called load lowering valve 3 for preventing any unintentional movement of the second actua- tor 2.
  • the operating valves 4 and 5 can also be used simul ⁇ taneously, in which case the movement of the hoisting boom assembly is a complex movement comprising dynamic components selected according to the need and produced on one hand by operations of the first operating valve 4 as described above, and on the other hand by operations of the second operating valve 5 as described above.
  • the method according to the invention renders it possible to make a movement in a certain direction with easy control, as well as to make the paths completely (freely/at random), if necessary.
  • These ver ⁇ satile operations can be controlled with only two operation valves 4, 5.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Structural Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • Analytical Chemistry (AREA)
  • Chemical & Material Sciences (AREA)
  • Automation & Control Theory (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Forklifts And Lifting Vehicles (AREA)
  • Operation Control Of Excavators (AREA)

Abstract

Procédé employé dans un système utilisant un fluide pressurisé pour exploiter et commander un ensemble flèche de levage, notamment en combinaison avec un engin de chantier, ce système étant constitué d'au moins deux mécanismes cylindre-piston (1, 2) utilisant le fluide pressurisé, d'une unité de compression (P) permettant de pressuriser le fluide et d'une unité de commande (V) constituée de deux vannes de fonctionnement (4, 5). Les mécanismes cylindre-piston (1, 2), amènent le fluide pressurisé jusqu'à leur chambre de compression respective à remplir à un moment donné, et, inversement, évacuent le fluide pressurisé de leur chambre de compression respective à vider à un moment donné. Le procédé est appliqué notamment lors de l'utilisation simultanée des mécanismes cylindre-piston (1, 2) par le raccordement des mécanismes cylindre-piston (1, 2) afin que ceux-ci fonctionnent en série, de telle sorte que le fluide pressurisé est acheminé depuis la chambre de compression d'un mécanisme cylindre-piston (1 ou 2) pour être évacué dans la chambre de compression de l'autre mécanisme cylindre-piston (2 ou 1) à remplir. Le fluide pressurisé est renvoyé à l'unité de commande (V) à partir de la chambre de compression de l'autre mécanisme cylindre-piston (2 ou 1) à vider.
PCT/FI1996/000559 1995-10-30 1996-10-22 Procede permettant, dans un systeme a fluide de pression, d'employer et de commander une fleche de levage, en particulier en combinaison avec un engin de chantier WO1997016372A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
DE19681624T DE19681624B4 (de) 1995-10-30 1996-10-22 Druckmittelsystem, insbesondere zum Anwenden und Steuern einer Hochhebeauslegereinheit, in Verbindung mit einer Arbeitsmaschine
CA002231498A CA2231498C (fr) 1995-10-30 1996-10-22 Procede permettant, dans un systeme a fluide de pression, d'employer et de commander une fleche de levage, en particulier en combinaison avec un engin de chantier
FI980558A FI122922B (fi) 1995-10-30 1998-03-12 Menetelmä erityisesti työkoneen yhteydessä olevaa nostopuomistoa käyttävässä ja ohjaavassa paineväliainejärjestelmässä
SE9801290A SE525907C2 (sv) 1995-10-30 1998-04-15 Förfarande vid ett system med ett trycksatt medium för användning och styrnig av en lyftbomsenhet speciellt i förening med en arbetsmaskin

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI955172 1995-10-30
FI955172A FI955172A0 (fi) 1995-10-30 1995-10-30 Foerfarande i ett tryckmediumsystem och ett tryckmediumsystem

Publications (1)

Publication Number Publication Date
WO1997016372A1 true WO1997016372A1 (fr) 1997-05-09

Family

ID=8544278

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Application Number Title Priority Date Filing Date
PCT/FI1996/000559 WO1997016372A1 (fr) 1995-10-30 1996-10-22 Procede permettant, dans un systeme a fluide de pression, d'employer et de commander une fleche de levage, en particulier en combinaison avec un engin de chantier

Country Status (5)

Country Link
CA (1) CA2231498C (fr)
DE (1) DE19681624B4 (fr)
FI (2) FI955172A0 (fr)
SE (1) SE525907C2 (fr)
WO (1) WO1997016372A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001002280A1 (fr) * 1999-07-06 2001-01-11 Plustech Oy Systeme de commande pour circuit de fleche d'un engin mobile de travaux publics
CN102605786A (zh) * 2012-04-09 2012-07-25 山河智能装备股份有限公司 一种静力压桩机的压桩回程控制系统及其操作方法
WO2024016529A1 (fr) * 2022-07-18 2024-01-25 湖南星邦智能装备股份有限公司 Système de commande hydraulique de maintien de niveau et plateforme aérienne de travail

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006018706A1 (de) 2006-04-21 2007-10-25 Robert Bosch Gmbh Hydraulische Steueranordnung
DE102007029355A1 (de) 2007-06-26 2009-01-02 Robert Bosch Gmbh Hydraulische Steueranordnung
DE102007029358A1 (de) 2007-06-26 2009-01-02 Robert Bosch Gmbh Verfahren und hydraulische Steueranordnung zur Druckmittelversorgung zumindest eines hydraulischen Verbrauchers
DE102012023562B3 (de) * 2012-12-01 2013-12-19 Festo Ag & Co. Kg Hebevorrichtung
FI124684B (fi) * 2012-12-03 2014-12-15 Ponsse Oyj Nosturi
CN108516467B (zh) * 2018-06-20 2019-10-25 徐州重型机械有限公司 起重机械的液压控制系统和起重机械

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US3884359A (en) * 1968-11-27 1975-05-20 Hopper Inc Level luffing crane
FI58676B (fi) * 1970-06-23 1980-11-28 Boehler & Co Ag Geb Borrningsstoed
JPS57195904A (en) * 1981-05-26 1982-12-01 Shimadzu Corp Hydraulic cylinder system
WO1988001600A1 (fr) * 1986-09-01 1988-03-10 Ösa Ab Dispositif servant a maintenir le dispositif de fixation de l'outil d'une grue a bras d'articulation a un niveau constant au-dessus du sol
DE3504761C2 (de) * 1984-02-15 1993-10-07 Steel Eng Co Ltd Bohrarm-Baugruppe
WO1993022233A1 (fr) * 1991-04-10 1993-11-11 Seppo Ensio Nisula Procede et appareil de transport d'un fluide sous pression vers des verins

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SE416538B (sv) * 1979-04-02 1981-01-19 Hiab Foco Ab Anordning vid hydrauliska kranar
DE4009163A1 (de) * 1990-03-02 1991-09-05 Schwing Gmbh F Bagger mit automatischer parallelhaltung seines von hand steuerbaren arbeitswerkzeuges und armsystem durch sensoren

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US3884359A (en) * 1968-11-27 1975-05-20 Hopper Inc Level luffing crane
FI58676B (fi) * 1970-06-23 1980-11-28 Boehler & Co Ag Geb Borrningsstoed
JPS57195904A (en) * 1981-05-26 1982-12-01 Shimadzu Corp Hydraulic cylinder system
DE3504761C2 (de) * 1984-02-15 1993-10-07 Steel Eng Co Ltd Bohrarm-Baugruppe
WO1988001600A1 (fr) * 1986-09-01 1988-03-10 Ösa Ab Dispositif servant a maintenir le dispositif de fixation de l'outil d'une grue a bras d'articulation a un niveau constant au-dessus du sol
WO1993022233A1 (fr) * 1991-04-10 1993-11-11 Seppo Ensio Nisula Procede et appareil de transport d'un fluide sous pression vers des verins

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PATENT ABSTRACTS OF JAPAN, Vol. 7, No. 47, M-196; & JP,A,57 195 904 (SHIMAZU SEISAKUSHO K.K.), 1 December 1982. *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001002280A1 (fr) * 1999-07-06 2001-01-11 Plustech Oy Systeme de commande pour circuit de fleche d'un engin mobile de travaux publics
CN102605786A (zh) * 2012-04-09 2012-07-25 山河智能装备股份有限公司 一种静力压桩机的压桩回程控制系统及其操作方法
WO2024016529A1 (fr) * 2022-07-18 2024-01-25 湖南星邦智能装备股份有限公司 Système de commande hydraulique de maintien de niveau et plateforme aérienne de travail

Also Published As

Publication number Publication date
FI980558A0 (fi) 1998-03-12
SE9801290L (sv) 1998-04-15
SE9801290D0 (sv) 1998-04-15
CA2231498C (fr) 2005-12-13
DE19681624B4 (de) 2007-10-04
CA2231498A1 (fr) 1997-05-09
FI980558A7 (fi) 1998-03-12
SE525907C2 (sv) 2005-05-24
DE19681624T1 (de) 1998-12-10
FI955172A0 (fi) 1995-10-30
FI122922B (fi) 2012-08-31

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