EP2157319A1 - Commande hydraulique pour un moteur hydraulique - Google Patents

Commande hydraulique pour un moteur hydraulique Download PDF

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Publication number
EP2157319A1
EP2157319A1 EP08014796A EP08014796A EP2157319A1 EP 2157319 A1 EP2157319 A1 EP 2157319A1 EP 08014796 A EP08014796 A EP 08014796A EP 08014796 A EP08014796 A EP 08014796A EP 2157319 A1 EP2157319 A1 EP 2157319A1
Authority
EP
European Patent Office
Prior art keywords
valve
pressure
hydraulic
control
hydraulic motor
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
Application number
EP08014796A
Other languages
German (de)
English (en)
Other versions
EP2157319B1 (fr
Inventor
Recept Macit
Christoph Dipl.-Ing. Stönner
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.)
Hawe Hydraulik SE
Original Assignee
Hawe Hydraulik SE
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 Hawe Hydraulik SE filed Critical Hawe Hydraulik SE
Priority to EP20080014796 priority Critical patent/EP2157319B1/fr
Priority to ES08014796T priority patent/ES2394389T3/es
Publication of EP2157319A1 publication Critical patent/EP2157319A1/fr
Application granted granted Critical
Publication of EP2157319B1 publication Critical patent/EP2157319B1/fr
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • 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
    • F15B2211/30505—Non-return valves, i.e. check valves
    • F15B2211/3051—Cross-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
    • F15B2211/31—Directional control characterised by the positions of the valve element
    • F15B2211/3105—Neutral or centre positions
    • F15B2211/3111—Neutral or centre positions the pump port being closed in the centre position, e.g. so-called closed 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
    • F15B2211/30—Directional control
    • F15B2211/315—Directional control characterised by the connections of the valve or valves in the circuit
    • F15B2211/3157—Directional control characterised by the connections of the valve or valves in the circuit being connected to a pressure source, an output member and a return line
    • F15B2211/31576—Directional control characterised by the connections of the valve or valves in the circuit being connected to a pressure source, an output member and a return line 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
    • F15B2211/30—Directional control
    • F15B2211/32—Directional control characterised by the type of actuation
    • F15B2211/321—Directional control characterised by the type of actuation mechanically
    • F15B2211/324—Directional control characterised by the type of actuation mechanically manually, e.g. by using a lever or pedal
    • 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
    • F15B2211/77—Control of direction of movement of the output member
    • F15B2211/7741—Control of direction of movement of the output member with floating mode, e.g. using a direct connection between both lines of a double-acting cylinder

Definitions

  • the invention relates to a hydraulic control according to the preamble of patent claim 1.
  • Such hydraulic controls are used inter alia in agricultural vehicles, such as hydraulic plows, or in snow plows, deep hole drills, mobile cranes or the like, wherein in the shut-off neutral position of the three-position spool control valve, the hydraulic motor is hydraulically blocked as soon as it is against or under load in a certain position was brought.
  • hydraulic controls in particular in the vehicles mentioned above or in comparable applications, it is often necessary to be able to lift the hydraulic lock, possibly without adjustment of the hydraulic motor and when the pressure source is in operation, and to set a floating position, so to speak.
  • the invention has for its object to provide a hydraulic control of the type mentioned, the active relief of at least one working fluid side of the hydraulic motor with a three-position slide control valve with shut-off neutral position allows without costly additional hydraulic components.
  • the control pressure used for hydraulic unlocking is usually present in the hydraulic control anyway and only needs to be brought to the corresponding hydraulic pilot operated check valve.
  • a check valve in this interesting area of the hydraulic control to the basic equipment can then be modified with negligible overhead either in a hydraulically releasable check valve or replace it with one, and then fulfills a useful dual function.
  • the at least one hydraulically releasable check valve is hydraulically unlocked to establish a direct working fluid connection from the working line to the reservoir.
  • the three-position slide control valve receives a fictitious fourth switching position, so to speak.
  • the check valve could also be actively unlocked in other ways, e.g. by means of a magnet, with or without pilot pressure, or by hand.
  • a magnetic switching valve is arranged in a control pressure line between a control pressure source and the hydraulically releasable check valve, which is selectively operable to hydraulically unlock the check valve (or the check valves for both sides).
  • the control pressure line leads anyway usually in such hydraulic control permanently existing control pressure, which is for example about 25 bar.
  • the required Entsperrdruck can be provided in other ways.
  • the magnetic switching valve 2/2-magnetic switching valve with a black and white switching magnet which switches when energized to passage and the check valves or hydraulically unlocked, however, shuts off in the de-energized state, so that the hydraulic motor is either hydraulically blocked, or in the other Control positions of the three-position slide control valve is hydraulically actuated without significant Abströmlage.
  • control pressure source comprises a pressure reducing valve fed by or from a pressure source of the hydraulic control, to which a substantially constant control pressure is adjustable, which is constantly available during operation of the hydraulic control, and, for example, also in proportional solenoid pressure pilot controls of the three-position sheer control valve is being used.
  • a particularly advantageous embodiment is characterized in that the two hydraulically releasable check valves for the two working lines of a hydraulic motor part of a between the three-position slide control valve and the hydraulic motor, z. B. for safety reasons, arranged secondary pressure limitation of the hydraulic motor. It already hereby existing components of the hydraulic control for the additional function of the active pressure relief of the hydraulic motor is used.
  • the hydraulic motor is between the respective hydraulically releasable check valve, a pressure relief valve, the z. B. may also have the function of a shock valve, and the three-position slide control valve, a load-holding valve disposed in each working line, which is hydraulically aufêtbar from upstream of the load-holding valve from the other working line.
  • the hydraulic motor is hydraulically blocked and isolated by the load-holding valves of the three-position slide control valve.
  • the secondary pressure limitation for one or both lines still responds in case of danger to z. B. to avoid a pressure surge or pressure increase above the maximum system pressure.
  • a floating position or at least one working fluid side of the hydraulic motor optionally and actively relieve pressure.
  • This unloaded hydraulic motor can then be adjusted for example by a coupling with another hydraulic motor of the other hydraulic motor.
  • the hydraulic motor is a double-acting differential cylinder.
  • FIG. 1 a block diagram of a hydraulic control S for here, for example, two hydraulic motors M, wherein the hydraulic control for the two hydraulic motors comprises different detailed solutions.
  • the hydraulic control S for the respective hydraulic motor M for example, a double-sided acted upon (or unilaterally acted upon) differential cylinder for moving a load L is connected via pressure lines 1, 1 'to a pressure source P, not shown.
  • the pressure source P is associated with a reservoir R, to which a return line 2 leads.
  • the respective hydraulic motor M is connected to the pressure lines 1, 1 'and the return line 2 via, in the illustrated embodiment, two working lines 4, 5, and in each case a three-position slide control valve D.
  • the three-position slide control valves D for the two hydraulic motors M can be shown as pressure-regulating proportional slide control valves with load pressure taps and a feed regulator 3 in the pressure line 1 '.
  • proportional solenoids 15 actuatable Druckvortician 16 for adjusting each three-position slide control valve D between three control positions, namely between two active control positions a, b and a shut-off neutral position 0, in which any connection between the working lines 4, 5 and the pressure line 1 ' or the return line 2 is blocked.
  • the pressure pilot 16 may be connected to a control pressure source 17, for example, has a fed from the pressure source P pressure reducing valve, which sets a certain, substantially constant control pressure in a control pressure line 8, for example, about 25 bar, while the system pressure z. B. may be up to 230 bar or more.
  • the in Fig. 1 left hydraulic motor M is hydraulically blocked in the illustrated shut-off neutral position 0 of the left three-position slide control valve D. Nevertheless, it is also possible to relieve even at least one working line 4, 5 of the hydraulic motor M, z. B. to set a floating position in which the hydraulic motor M, for example, by a coupling K from the other hydraulic motor M 'can be adjusted.
  • at least one, or branch of both working lines 4, 5 bypasses bypass lines 2 'to the return line 2, and is connected to the node 6 at which the respective bypass line 2' branches off from the working line 4, 5 or in FIG Beipasstechnisch 2 ', each one in the flow direction to the reservoir R blocking, hydraulically releasable check valve 7 is provided.
  • the two check valves 7 are connected via an unlock line 9 and expediently a common solenoid switching valve 10 with a black / white switching magnet 11 to the control pressure line 8, which carries the control pressure source 17 held by the control pressure and to the possibly also the feedforward control 16 of the three-position Schierber tenuventile D is connected.
  • the solenoid switching valve 10 is, for example, connected so that it is in the shut-off state shown in the de-energized state of the solenoid 11, set by a spring 12, and 11 is energized when energized solenoid 11 in the passage position in which the control pressure in the control pressure line 8 via the Entsperr Oberen 9 both check valves 7 hydraulically unlocked and the working lines 4, 5 depressurized to the reservoir.
  • the magnetic switching valve 10 can only be energized in the shut-off neutral position 0 of the three-position slide control valve D.
  • the Entsperr effet 9 for the two check valves 7 may be connected via a connection 13 with a throttle arranged therein 14 with the return line 2 in order to avoid leakage-induced pressure build-up.
  • the two check valves 7 for the in Fig. 1 the left hydraulic motor M may be without any existing equipment components of the hydraulic control, e.g. B. suction valves N, as they are needed in some applications. These suction valves N are replaced here for the active pressure relief either by the hydraulically releasable check valves 7 or modified to these. Otherwise, the hydraulic control S could be supplemented by the correspondingly interconnected valves 7, 10. Alternatively (not shown), the respective check valve could be unlocked by a magnet, or by hand, with or without pilot pressure.
  • the in Fig. 1 right hydraulic motor M ' has in its hydraulic control S as a safety feature on a so-called secondary pressure limiting B on.
  • the secondary pressure limitation B serves, for example, to mitigate in the shown shut-off neutral position 0 of the right three-position spool control valve D caused by external influences on the hydraulic motor pressure surge, or to prevent pressure above a permissible pressure value. It could thus make the secondary pressure limiting B a so-called shock-valve function.
  • each working line 4 5 branches off a connecting line 19, 18 to the return line 2 from.
  • a pressure-controlled and spring-biased pressure relief valve 20 is included, which is alssteubar from the shut-off position shown pressure-dependent to the return line 2 and the pressure in the working line 4, 5 limited.
  • the two pressure relief valves 20 can be set to different response pressures.
  • only one working line 4, 5 or in the case of a unilaterally loadable hydraulic motor of the then single working line a secondary pressure limitation B is assigned.
  • the two Nachsaug Wegtschventile N or possibly only one either to the hydraulically releasable check valves 7 are modified for the additional function of active pressure relief of the hydraulic motor M in the shut-off neutral position 0 of the three-position slide control valve or modified by the hydraulically releasable check valves 7 and replaced accordingly the Unlock line 9 and the solenoid valve 10 connected.
  • the hydraulically releasable check valves 7 of in Fig. 1 Right hydraulic motor M can be connected via the Entsperrtechnischen 9 and the solenoid valve 10 to the control pressure line 8, and can be connected via the throttle 14 and the connection 13 directly to the return line 2.
  • each working line 5 4 a in the flow direction to the three-position slide control valve D blocking load-holding valve 21, 22 is arranged.
  • the two load-holding valves 21, 22 are cross-connected via lines 23, 24 from the other working line 5 or 4 hydraulically unlocked when the three-position valve control valve D is adjusted in one of the control positions a, b.
  • the principle of providing a pilot operated check valve 7 and solenoid valve 10 for selectively hydraulically unblocking the check valve 7 could also be realized with a hydromotor having only one working line, or could be implemented in the secondary pressure limiter B for only one of the secondary check valves N.
  • the hydraulic control S only ever contains a three-position slide control valve D with shut-off neutral position 0 for the hydraulic motor M, M ', it works without significant additional effort as if per hydraulic motor M, M' a much more complicated four-position valve control valve with shut-off and not shut-off Neutral positions or two interconnected three-position slide control valves, one with shut-off neutral position and one with open neutral position would or would be provided.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid-Pressure Circuits (AREA)
EP20080014796 2008-08-20 2008-08-20 Commande hydraulique pour un moteur hydraulique Expired - Fee Related EP2157319B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP20080014796 EP2157319B1 (fr) 2008-08-20 2008-08-20 Commande hydraulique pour un moteur hydraulique
ES08014796T ES2394389T3 (es) 2008-08-20 2008-08-20 Control hidráulico para un motor hidráulico

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20080014796 EP2157319B1 (fr) 2008-08-20 2008-08-20 Commande hydraulique pour un moteur hydraulique

Publications (2)

Publication Number Publication Date
EP2157319A1 true EP2157319A1 (fr) 2010-02-24
EP2157319B1 EP2157319B1 (fr) 2012-10-10

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Family Applications (1)

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EP20080014796 Expired - Fee Related EP2157319B1 (fr) 2008-08-20 2008-08-20 Commande hydraulique pour un moteur hydraulique

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EP (1) EP2157319B1 (fr)
ES (1) ES2394389T3 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2466154A1 (fr) * 2010-12-17 2012-06-20 HAWE Hydraulik SE Dispositif de commande hydroélectrique
EP3135924A1 (fr) * 2015-08-24 2017-03-01 HAWE Hydraulik SE Commande hydraulique
CN113969911A (zh) * 2020-07-24 2022-01-25 哈威液压股份公司 一种预选阀、液压阀组件和液压控制单元

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1185261A (en) * 1968-01-12 1970-03-25 Pkm Hydraulik Karl Marx Stadt Hydraulic Control Means for an Assembling and Welding Apparatus
EP0786598A1 (fr) 1996-01-24 1997-07-30 Brevini Hydraulics S.p.A. Dispositif pour l'actionnement d'un appareil hydraulique dont la vitesse est indépendante de la charge agissant sur l'appareil hydraulique
US20050274419A1 (en) * 2004-06-14 2005-12-15 Sauer-Danfoss Aps Valve arrangement

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1185261A (en) * 1968-01-12 1970-03-25 Pkm Hydraulik Karl Marx Stadt Hydraulic Control Means for an Assembling and Welding Apparatus
EP0786598A1 (fr) 1996-01-24 1997-07-30 Brevini Hydraulics S.p.A. Dispositif pour l'actionnement d'un appareil hydraulique dont la vitesse est indépendante de la charge agissant sur l'appareil hydraulique
US20050274419A1 (en) * 2004-06-14 2005-12-15 Sauer-Danfoss Aps Valve arrangement

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2466154A1 (fr) * 2010-12-17 2012-06-20 HAWE Hydraulik SE Dispositif de commande hydroélectrique
EP3135924A1 (fr) * 2015-08-24 2017-03-01 HAWE Hydraulik SE Commande hydraulique
CN113969911A (zh) * 2020-07-24 2022-01-25 哈威液压股份公司 一种预选阀、液压阀组件和液压控制单元

Also Published As

Publication number Publication date
ES2394389T3 (es) 2013-01-31
EP2157319B1 (fr) 2012-10-10

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