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EP2620656A3 - Load sensing valve assembly with pressure control - Google Patents

Load sensing valve assembly with pressure control Download PDF

Info

Publication number
EP2620656A3
EP2620656A3 EP13150235.3A EP13150235A EP2620656A3 EP 2620656 A3 EP2620656 A3 EP 2620656A3 EP 13150235 A EP13150235 A EP 13150235A EP 2620656 A3 EP2620656 A3 EP 2620656A3
Authority
EP
European Patent Office
Prior art keywords
pressure
pump
port
throttle
compensator
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
EP13150235.3A
Other languages
German (de)
French (fr)
Other versions
EP2620656A2 (en
EP2620656B1 (en
Inventor
Christian Duerr
Robert Rueppel
Kjeld Madsen
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP2620656A2 publication Critical patent/EP2620656A2/en
Publication of EP2620656A3 publication Critical patent/EP2620656A3/en
Application granted granted Critical
Publication of EP2620656B1 publication Critical patent/EP2620656B1/en
Not-in-force 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
    • F15B11/04—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed
    • F15B11/05—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed specially adapted to maintain constant speed, e.g. pressure-compensated, load-responsive
    • F15B11/055—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed specially adapted to maintain constant speed, e.g. pressure-compensated, load-responsive by adjusting the pump output or bypass
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/205—Systems with pumps
    • F15B2211/2053—Type of pump
    • F15B2211/20546—Type of pump variable capacity
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/25—Pressure control functions
    • F15B2211/253—Pressure margin control, e.g. pump pressure in relation to load pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/305—Directional control characterised by the type of valves
    • F15B2211/30525—Directional control valves, e.g. 4/3-directional control valve
    • F15B2211/3053—In combination with a pressure compensating valve
    • F15B2211/30535—In combination with a pressure compensating valve the pressure compensating valve is arranged between pressure source and directional control valve
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/50—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
    • F15B2211/50518—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means using pressure relief 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
    • F15B2211/50—Pressure control
    • F15B2211/515—Pressure control characterised by the connections of the pressure control means in the circuit
    • F15B2211/5159—Pressure control characterised by the connections of the pressure control means in the circuit being connected to an output member and a return line
    • 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
    • F15B2211/605—Load sensing circuits
    • F15B2211/6051—Load sensing circuits having valve means between output member and the load sensing circuit
    • 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
    • F15B2211/605—Load sensing circuits
    • F15B2211/6051—Load sensing circuits having valve means between output member and the load sensing circuit
    • F15B2211/6054—Load sensing circuits having valve means between output member and the load sensing circuit using shuttle 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
    • F15B2211/605—Load sensing circuits
    • F15B2211/6051—Load sensing circuits having valve means between output member and the load sensing circuit
    • F15B2211/6055—Load sensing circuits having valve means between output member and the load sensing circuit using pressure relief 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
    • F15B2211/65—Methods of control of the load sensing pressure
    • F15B2211/654—Methods of control of the load sensing pressure the load sensing pressure being lower than the load pressure

Landscapes

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

Abstract

Die Erfindung betrifft eine Ventilbaugruppe (10) mit einem ersten und einem zweiten Verbraucheranschluss (A; B) zum Anschluss eines hydraulischen Verbrauchers (11), einem Pumpenanschluss (P) zum Anschluss einer Pumpe (13), einem Tankanschluss (T) zum Anschluss eines Tanks (12) und einem LS-Anschluss (LS) zum Anschluss an einen Förderdruckregler (14) der Pumpe (13), wobei eine stetig verstellbare Zumessdrossel (20) vorgesehen ist, der eine Druckwaage (22) pumpenseitig in Reihe geschaltet ist, welche mit dem Pumpenanschluss (P) verbunden ist, so dass sich zwischen der Zumessdrossel (20) und der Druckwaage (22) ein erster Druck (41) ergibt, wobei der Zumessdrossel (20) eine Dämpfungsdrossel (21) tankseitig in Reihe geschaltet ist, so dass sich zwischen der Zumessdrossel (20) und der Dämpfungsdrossel (21) ein zweiter Druck (42) ergibt, der mit einem der Verbraucheranschlüsse (A; B) verbunden ist, wobei der Dämpfungsdrossel (21) ein erstes Druckbegrenzungsventil (31) mit verstellbarem Auslösedruck tankseitig in Reihe geschaltet ist, so dass sich zwischen der Dämpfungsdrossel (21) und dem ersten Druckbegrenzungsventil (31) ein dritter Druck (43) ergibt, der wenigstens mittelbar mit dem LS-Anschluss (LS) verbunden ist, wobei der erste und der dritte Druck (41; 43) so an die Druckwaage (22) angeschlossen sind, dass die Druckwaage eine erste vorgebbare Druckdifferenz zwischen dem ersten und dem dritten Druck (41; 43) einregelt.The invention relates to a valve assembly (10) having a first and a second consumer port (A; B) for connecting a hydraulic consumer (11), a pump port (P) for connecting a pump (13), a tank port (T) for connecting a Tanks (12) and a LS connection (LS) for connection to a delivery pressure regulator (14) of the pump (13), wherein a continuously adjustable Zumessdrossel (20) is provided, which is connected to a pressure compensator (22) on the pump side in series, which is connected to the pump port (P), so that between the metering orifice (20) and the pressure compensator (22) results in a first pressure (41), wherein the metering orifice (20) is a damping throttle (21) connected in series tank side, so a second pressure (42) is produced between the metering throttle (20) and the damping throttle (21) and connected to one of the consumer ports (A; B), wherein the damping throttle (21) comprises a first pressure limiting valve (31) with adjustable throttle Triggering pressure tank side connected in series, so that between the damping throttle (21) and the first pressure relief valve (31) results in a third pressure (43) which is at least indirectly connected to the LS port (LS), wherein the first and the third pressure (41; 43) are connected to the pressure compensator (22) such that the pressure compensator adjusts a first presettable pressure difference between the first and the third pressure (41; 43).

Erfindungsgemäß ist der zweite Druck (42) an ein zweites Druckbegrenzungsventil (32) angeschlossen, dessen Auslösedruck verstellbar ist.

Figure imgaf001
According to the invention, the second pressure (42) is connected to a second pressure limiting valve (32) whose triggering pressure is adjustable.
Figure imgaf001
EP13150235.3A 2012-01-26 2013-01-04 Load sensing valve assembly with pressure control Not-in-force EP2620656B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102012001549A DE102012001549A1 (en) 2012-01-26 2012-01-26 Load-sensing valve assembly with pressure control

Publications (3)

Publication Number Publication Date
EP2620656A2 EP2620656A2 (en) 2013-07-31
EP2620656A3 true EP2620656A3 (en) 2017-03-29
EP2620656B1 EP2620656B1 (en) 2018-12-26

Family

ID=47561339

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13150235.3A Not-in-force EP2620656B1 (en) 2012-01-26 2013-01-04 Load sensing valve assembly with pressure control

Country Status (3)

Country Link
EP (1) EP2620656B1 (en)
BR (1) BR102013001832A2 (en)
DE (1) DE102012001549A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105443475B (en) * 2015-12-30 2017-10-27 中国铁建重工集团有限公司 Load pressure Self Adaptive Control hydraulic system, control method and pre-cut scouring machine
FR3054008B1 (en) * 2016-07-13 2019-05-10 Robert Bosch Gmbh HYDRAULIC DISTRIBUTOR INSTALLATION EQUIPPED WITH PRESSURE SHOCK ABSORBER
DE102020210441A1 (en) * 2020-08-17 2022-02-17 Hawe Hydraulik Se Proportional spool valve with a pressure relief valve, pressure relief valve and hydraulic system

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3709504A1 (en) * 1987-03-23 1988-10-06 Rexroth Mannesmann Gmbh Valve device
DE19715020A1 (en) * 1997-04-11 1998-10-15 Rexroth Mannesmann Gmbh Hydraulic control system for transporting vehicle, especially sedimentation vessels

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4420682A1 (en) * 1994-06-14 1996-01-04 Rexroth Mannesmann Gmbh Hydraulic control for a dividing machine tool
DE19734020A1 (en) * 1997-08-06 1999-02-11 Mannesmann Rexroth Ag Pilot operated pressure relief valve
FI104531B (en) * 1998-09-15 2000-02-29 Timberjack Oy Pruning equipment and method in pruning equipment

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3709504A1 (en) * 1987-03-23 1988-10-06 Rexroth Mannesmann Gmbh Valve device
DE19715020A1 (en) * 1997-04-11 1998-10-15 Rexroth Mannesmann Gmbh Hydraulic control system for transporting vehicle, especially sedimentation vessels

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
MANNESMANN REXROTH: "HIGH PRESSURE LOAD-SENSING CONTROL BLOCK TYPE M4-15, SERIES 1X IN ASANDWICH PLATE DESIGN", MANNESMANN REXROTH RE 64 282/01.97, XX, XX, 1 January 1997 (1997-01-01), pages 1 - 20, XP001027942 *

Also Published As

Publication number Publication date
EP2620656A2 (en) 2013-07-31
BR102013001832A2 (en) 2016-02-23
EP2620656B1 (en) 2018-12-26
DE102012001549A1 (en) 2013-08-01

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