EP3189239B1 - Procédé et agencement pour convertir la pression et pour agencer un cycle de charge - Google Patents

Procédé et agencement pour convertir la pression et pour agencer un cycle de charge

Info

Publication number
EP3189239B1
EP3189239B1 EP15838531.0A EP15838531A EP3189239B1 EP 3189239 B1 EP3189239 B1 EP 3189239B1 EP 15838531 A EP15838531 A EP 15838531A EP 3189239 B1 EP3189239 B1 EP 3189239B1
Authority
EP
European Patent Office
Prior art keywords
converter
pressure
cylinder
conversion
valve
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.)
Active
Application number
EP15838531.0A
Other languages
German (de)
English (en)
Other versions
EP3189239C0 (fr
EP3189239A4 (fr
EP3189239A1 (fr
Inventor
Mikko Junttila
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.)
St-Koneistus Oy
Original Assignee
St-Koneistus Oy
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 St-Koneistus Oy filed Critical St-Koneistus Oy
Publication of EP3189239A1 publication Critical patent/EP3189239A1/fr
Publication of EP3189239A4 publication Critical patent/EP3189239A4/fr
Application granted granted Critical
Publication of EP3189239C0 publication Critical patent/EP3189239C0/fr
Publication of EP3189239B1 publication Critical patent/EP3189239B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • F15B11/02—Systems essentially incorporating special features for controlling the speed or actuating force of an output member
    • F15B11/028—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the actuating force
    • F15B11/032—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the actuating force by means of fluid-pressure converters
    • F15B11/0325—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the actuating force by means of fluid-pressure converters the fluid-pressure converter increasing the working force after an approach stroke
    • 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
    • F15B3/00—Intensifiers or fluid-pressure converters, e.g. pressure exchangers; Conveying pressure from one fluid system to another, without contact between the fluids
    • 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
    • F04B9/00—Piston machines or pumps characterised by the driving or driven means to or from their working members
    • F04B9/08—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid
    • 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
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/08—Characterised by the construction of the motor unit
    • F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type

Definitions

  • the invention relates to converting pressure and/or flow in a pressure medium-operated system, and especially to a method and arrangement for converting pressure and for arranging a charging cycle.
  • Pressure converters may be necessary in pressure medium-operated systems in situations, for instance, where there is a need to optimize motion rates and/or forces in working phases.
  • the pressure, surface area and flow ratios of a pressure medium-operated system and its components are typically used in pressure converters.
  • Publication WO2011/048271 discloses a method for converting the pressures in a pressure medium-operated system by using valve structures and other corresponding components known per se. In said method, the pressure of one or more actuators is converted with one or more pressure converters to differ from the system pressure.
  • one or more pressure converter cylinders are switched on or off as a set limit value controlling the valves is exceeded or undershot during the movement of one or more actuators requiring a conversion of the motion rate or force.
  • JP H09 158901 discloses an in-line pressure increase apparatus used when operating a hydraulic cylinder.
  • the object is to develop a new method and arrangement for converting pressure and for arranging a charging cycle.
  • the object of the invention is achieved by a method and pressure converter that are characterised by what is stated in the independent claims. Preferred embodiments of the invention are disclosed in the dependent claims.
  • the invention is based on adapting the position of a piston and/or piston rod and/or a part coupled to them and moving with them to switch on at least the conversion and/or charging cycle of the pressure converter.
  • the pressure medium can no longer flow from the side of the larger surface area of the converter cylinder 1, i.e. the piston 8 side, through said pressure conversion channel opening to the second check valve 5, but only through the first converter valve 3, more precisely the check valve of the first converter valve 3, to channel A and on to tank line T.
  • the piston 8 When the piston 8 has further moved in direction - and reached a position, where it has passed the at least one opening of the pressure converter channel arranged in the wall of the cylinder barrel 11 of the converter cylinder 1, the pressure medium can flow from the side of the smaller surface area of the converter cylinder 1 only through the second check valve 5 to channel A and on to tank line T.
  • the position of the moving part, in this embodiment the piston 8, of the converter cylinder switches on the charging control, in this case the ending of the conversion cycle.
  • the second converter valve 10 may comprise a check valve that is controlled mechanically by a limit switch, for example, electrically by a position transducer, for example, or by some other manner known per se, a directional control valve, or some other valve that is adaptable to implement the function described herein.
  • the second converter valve 10 may also comprise a mechanically opened check valve cartridge or some other corresponding valve component that is arrangeable internally to the structure of the converter cylinder 1 and adaptable to implement the function described herein.
  • the piston 8, for instance may then be adapted to change the state of the second converter valve 10 when returning to its initial position.
  • the first converter valve 3 is adapted to stop the entry of the pressure medium to the side of the larger surface area of the converter cylinder 1, i.e. to the piston 8 side of the converter cylinder 1, when the pressure in channel A is lower than the set value of the first converter valve 3.
  • the first converter valve 3 is adapted to allow the pressure medium to flow to the side of the larger surface area of the converter cylinder 1, i.e. to the piston 8 side, when the pressure in channel A increases under the influence of the load of the actuator 2 to be equal to the set value of the first converter valve 3 or higher. Because the same pressure then prevails on both work surfaces of the converter cylinder 1, the pressure moves the piston 8 and piston rod 9 to direction +, i.e. to the direction of the smaller surface area, under the influence of the surface area difference between the work surfaces of the converter cylinder 1.
  • a switching part 12 is further connected to the piston 8 and/or piston rod 9 and adapted to change the state of the second converter valve 10.
  • the switching part 12 may be a part forming a uniform structure with the piston 8 and/or piston rod 9, or a structural part connected to the piston 8 and/or piston rod 9 in some other manner and arranged to move together with them, or some other structural part that is able to cause the change of state in the second converter valve 10 on the basis of the position of the piston 8, piston rod 9, or some other moving part of the converter cylinder 1, 1' in relation to the cylinder barrel 11 of the converter cylinder 1, 1'.
  • Figures 5 and 6 show some other pressure medium systems that comprise a pressure converter 7.
  • the embodiment of Figure 5 may otherwise correspond to that of Figure 3 and the embodiment of Figure 6 may otherwise correspond to that of Figure 4 , but the conversion ratio in the embodiments of Figures 5 and 6 has been increased in such a manner that the pressure converter 7 comprises a second converter cylinder 1'.
  • the second converter cylinder 1' may comprise a double-acting pressure medium cylinder known per se and/or a two-chamber pressure medium cylinder.
  • the first converter valve 3 comprises a sequence valve or some other pressure-opening valve known per se with adjustable opening pressure.
  • the first converter valve comprises one or more separate check valves with a pressure release valve known per se connected in parallel thereto in a manner known per se.
  • One or more check valves of the first converter valve 3 may be integrated to the valve that opens by the pressure of the first converter valve 3, or one or more check valves of the first converter valve 3 may be arranged in parallel to a separate, pressure-opening valve of the first converter valve 3.
  • the check valve of the first converter valve 3 may comprise at least one valve component that is arrangeable internally to the structure of the converter cylinder 1 and adaptable to implement the function described herein.
  • the at least one check valve of the first converter valve 3 and/or the pressure-opening valve of the first converter valve 3 may then be positioned in the rear piece of the cylinder, for example.
  • some or all of the pressure converter 7 components may be arranged into an integrated entity or correspondingly formed by connecting separated components to each other.
  • the pressure medium in the first position of the directional control valve 6, can, thus, flow from channel P to channel A, and from channel B to channel T, i.e. the tank connection.
  • the pressure medium in the embodiments of Figures 3 to 6 , it is then possible to operate in direction + with the actuator 2.
  • the pressure medium is allowed to flow from channel P to channel B, and from channel A to channel T, which means that in the embodiments of Figures 3 to 6 , it is possible to operate in direction - with the actuator 2.
  • the directional control valve 6 may further comprise a third position, in which flow between all channels, for instance, is closed, and/or other additional positions.
  • the pressure converter 7 can be positioned in channel B in addition to or instead of channel A.
  • the pressure converter 7 arranged in channel B can then naturally convert the pressure when operating in direction - and charge the pressure converter 7 when operating in direction +.
  • the at least one converter cylinder 1 of the pressure converter 7 arranged in channel A and/or B can be arranged in the direction opposite to the direction of the embodiments of Figures 3 to 6 , in which case the side of the larger surface area of at least one converter cylinder 1, 1' is connected to the actuator 2.
  • the pressure converter 1 does not increase the pressure supplied to the at least one actuator 2, but increases the volume flow supplied to the at least one actuator 2. This may be useful in applications, in which high force is not needed, but a high motion speed of the actuator 2 is beneficial.
  • the switching of the charging operation is thus forced, i.e. arranged to depend on the physical position of the piston and/or piston rod in at least one converter cylinder, whereby it is possible ensure that the pressure converter 7 is always charged, i.e. the piston of the converter cylinder 1, 1' has been returned to the position, in which the conversion cycle may begin as a new work movement of the actuator 2 starts in the work direction, in which the conversion cycle of the pressure converter 7 can be utilized.
  • the converter cylinder may also be one of said other converter cylinders. Switching the charging operation on also requires very little energy/pressure, so there is no need to generate pressure separately for the charging.
  • the pressure converter 7 is also in all embodiments arranged in each case between one pressure medium line/channel, so it comprises exactly one input channel and one output channel. In the case of a double-acting actuator, it is possible to arrange in each case at least one pressure converter 7 into either one of the pressure medium lines/channels in one or both directions.
  • the now described pressure converter is also suitable for single-acting actuators, such as actuators like the tip cart of a tractor that reverse through gravity, spring force or some other corresponding force. On the other hand, it is possible to work with double-acting actuators in direction - without this affecting the charging of the pressure converter.
  • the actuator 2 may be dimensioned to be smaller than without using the present solution. Thanks to the smaller actuator, such as pressure medium cylinder, it is then possible to provide a higher working rate for an external actuator in work phases that do not require high force, than when using a larger actuator that is able to produce the same force with a corresponding work pressure without a pressure converter.
  • the use of the external actuator can then also be optimized with the present solution so that high force is only produced when the load of the actuator is high, and normal work pressure can be used with a smaller load, and the rate of the actuator can be correspondingly optimized.
  • a low-load phase such as transfer phase
  • an actual work phase such as wood splitting or branch cutting
  • a pressure converter to produce higher force.
  • a corresponding force may be achieved with a smaller actuator but higher work pressure.
  • a low-pressure system provides the high pressure for the actuator requiring it and the entire pressure medium system need not be made into a high-pressure system.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Fluid-Pressure Circuits (AREA)

Claims (8)

  1. Convertisseur de pression (7) qui comprend au moins un cylindre de conversion actionné par un fluide sous pression (1) et au moins une première soupape de convertisseur (3) et qui peut être adaptée pour convertir la pression fournie à un ou plusieurs actionneurs externes (2) en fonction du rapport des surfaces d'au moins un cylindre de conversion (1),
    dans lequel le convertisseur de pression (7) comprend en outre des moyens pour contrôler les cycles de conversion et de chargement du convertisseur de pression, lesquels moyens comprennent au moins une partie mobile (8, 9, 12) dans au moins un cylindre de conversion, la partie mobile étant adaptée pour se déplacer par rapport au corps de cylindre (11) du cylindre de conversion (1) et la position de la partie mobile (8, 9, 12) pouvant être adaptée pour déterminer le contrôle du cycle de conversion et de chargement du convertisseur de pression (7) ;
    dans lequel ladite première soupape de convertisseur (3) comprend une soupape de séquence ou au moins une soupape de libération de pression avec une ou plusieurs soupapes antiretour séparées raccordées en parallèle ;
    caractérisé en ce que :
    le convertisseur de pression (7) peut être raccordé exactement à une conduite de pression, moyennant quoi le convertisseur de pression (7) comprend exactement un canal d'entrée et un canal de sortie ;
    dans lequel un cycle de conversion du convertisseur de pression (7), dans lequel le flux de pression et/ou volumique fourni à au moins un actionneur (2) est converti dans la mesure où le rapport des surfaces dudit au moins un cylindre de conversion (1) est initié en réponse à ladite au moins une partie mobile (8, 9, 12) du cylindre de conversion (1) qui atteint une position par rapport au corps de cylindre (11) du cylindre de conversion (1), laquelle position change au début du cycle de conversion, et
    dans lequel un cycle de chargement du convertisseur de pression, dans lequel le piston du cylindre de conversion (1) revient à une position à partir de laquelle le cycle de conversion suivant peut être démarré au début du mouvement de travail de l'actionneur (2), se termine en réponse à ladite au moins une partie mobile (8, 9, 12) du cylindre de conversion (1) qui atteint une position par rapport au corps de cylindre (11) du cylindre de conversion (1), laquelle position change à la fin du cycle de chargement.
  2. Convertisseur de pression selon la revendication 1, dans lequel la au moins une partie mobile comprend au moins un piston de cylindre de conversion (8), la tige de piston (9) et/ou une partie de commutation (12) raccordée au piston (8) ou à la tige de piston (9) et agencée pour le déplacer.
  3. Convertisseur de pression selon la revendication 1 ou 2, dans lequel les moyens pour passer à un cycle de conversion et de chargement du convertisseur de pression comprennent en outre au moins une seconde soupape de convertisseur (10).
  4. Convertisseur de pression selon l'une quelconque des revendications 1 à 3, qui comprend deux premières soupapes de convertisseur (3) et/ou secondes soupapes de convertisseur (10) ou plus raccordées en parallèle.
  5. Convertisseur de pression selon l'une quelconque des revendications 1 à 4, qui comprend au moins deux cylindres de conversion (1, 1') raccordés en série ou en parallèle.
  6. Agencement qui comprend au moins deux convertisseurs de pression (7) selon l'une quelconque des revendications 1 à 4 raccordés en série ou en parallèle.
  7. Agencement qui comprend au moins deux convertisseurs de pression (7) selon l'une quelconque des revendications 1 à 4, et au moins un actionneur externe (2), dans lequel ledit convertisseur de pression (7) est raccordé au moins au canal d'entrée ou de sortie de l'actionneur (2) chaque fois.
  8. Procédé pour convertir la pression dans un système de fluide sous pression, dans lequel procédé, la pression fournie au moins à un actionneur externe (2) est convertie (21) en fonction du rapport des surfaces d'au moins un cylindre de conversion (1) d'un convertisseur de pression (7), dans lequel le convertisseur de pression (7) comprend en outre une première soupape de convertisseur (3) comprenant une soupape de séquence ou au moins une soupape de libération de pression avec une ou plusieurs soupapes antiretour séparées raccordées en parallèle, dans lequel le convertisseur de pression (7) est exactement raccordé à une conduite de pression, moyennant quoi le convertisseur de pression (7) comprend exactement un canal d'entrée et un canal de sortie,
    commuter (22) le contrôle des cycles de conversion et de chargement du convertisseur de pression (7) avec des moyens pour contrôler les cycles de conversion et de chargement du convertisseur de pression, lesquels moyens comprennent au moins une partie mobile (8, 9, 12) dans le cylindre de conversion (1), la partie mobile étant adaptée pour se déplacer par rapport au corps de cylindre (11) du cylindre de conversion (1) et la position de la partie mobile étant adaptée pour déterminer le contrôle du cycle de conversion et de chargement du convertisseur de pression, et
    débuter un cycle de conversion du convertisseur de pression (7), dans lequel le flux de pression et/ou volumique fourni audit au moins un actionneur (2) est converti en fonction du rapport des surfaces dudit au moins un cylindre de conversion (1) en réponse à ladite au moins une partie mobile (8, 9, 12) du cylindre de conversion (1) qui atteint une position par rapport au corps de cylindre (11) du cylindre de conversion (1), laquelle position change au début du cycle de conversion, et
    terminer un cycle de chargement du convertisseur de pression, dans lequel le piston du cylindre de conversion (1) revient à une position à partir de laquelle le cycle de conversion suivant peut être démarré au début du mouvement de travail de l'actionneur (2), en réponse à ladite au moins une partie mobile (8, 9, 12) du cylindre de conversion (1) qui atteint une position par rapport au corps de cylindre (11) du cylindre de conversion (1), laquelle position change à la fin du cycle de chargement.
EP15838531.0A 2014-09-05 2015-09-02 Procédé et agencement pour convertir la pression et pour agencer un cycle de charge Active EP3189239B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI20145773A FI20145773A7 (fi) 2014-09-05 2014-09-05 Menetelmä ja järjestely paineen muuntamiseksi ja latausjakson järjestämiseksi
PCT/FI2015/050570 WO2016034770A1 (fr) 2014-09-05 2015-09-02 Procédé et agencement pour convertir la pression et pour agencer un cycle de charge

Publications (4)

Publication Number Publication Date
EP3189239A1 EP3189239A1 (fr) 2017-07-12
EP3189239A4 EP3189239A4 (fr) 2018-07-18
EP3189239C0 EP3189239C0 (fr) 2025-07-23
EP3189239B1 true EP3189239B1 (fr) 2025-07-23

Family

ID=55439167

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15838531.0A Active EP3189239B1 (fr) 2014-09-05 2015-09-02 Procédé et agencement pour convertir la pression et pour agencer un cycle de charge

Country Status (3)

Country Link
EP (1) EP3189239B1 (fr)
FI (1) FI20145773A7 (fr)
WO (1) WO2016034770A1 (fr)

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4021156A (en) * 1976-01-15 1977-05-03 Western Electric Co. High pressure hydraulic system
JP2955220B2 (ja) * 1995-12-06 1999-10-04 太陽鉄工株式会社 インライン増圧装置
EP1318906B1 (fr) * 2000-09-20 2009-09-30 LAEIS GmbH Dispositif de commande pour une presse hydraulique et procede pour son fonctionnement
DE10158182B4 (de) * 2001-11-28 2005-06-02 Minibooster Hydraulics A/S Doppeltwirkender hydraulischer Druckverstärker
JP2009142800A (ja) * 2007-12-18 2009-07-02 Smc Corp 増圧器配管における除湿システム及び除湿方法
FI20090383L (fi) * 2009-10-20 2011-04-21 Mikko Sakari Junttila Paineenmuuntomenetelmä ja laite sen toteuttamiseksi
EP2719839B1 (fr) * 2012-10-09 2016-02-24 Caterpillar Work Tools B. V. Circuit hydraulique d'un vérin hydraulique

Also Published As

Publication number Publication date
FI20145773A7 (fi) 2016-03-06
EP3189239C0 (fr) 2025-07-23
EP3189239A4 (fr) 2018-07-18
WO2016034770A1 (fr) 2016-03-10
EP3189239A1 (fr) 2017-07-12

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