WO2017064953A1 - 流体圧制御回路と流体圧制御装置 - Google Patents
流体圧制御回路と流体圧制御装置 Download PDFInfo
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- WO2017064953A1 WO2017064953A1 PCT/JP2016/076492 JP2016076492W WO2017064953A1 WO 2017064953 A1 WO2017064953 A1 WO 2017064953A1 JP 2016076492 W JP2016076492 W JP 2016076492W WO 2017064953 A1 WO2017064953 A1 WO 2017064953A1
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- 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
- F15B11/17—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors using two or more pumps
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- 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
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- 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
- F15B13/024—Pressure relief valves
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- 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
- F15B13/08—Assemblies of units, each for the control of a single servomotor only
- F15B13/0803—Modular units
- F15B13/0832—Modular valves
- F15B13/0839—Stacked plate type valves
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- 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
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- 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
- F15B2211/20576—Systems with pumps with multiple pumps
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- 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
- F15B2211/251—High pressure control
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- 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
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- 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
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- 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
- F15B2211/3059—Assemblies of multiple valves having multiple valves for multiple output members
- F15B2211/30595—Assemblies of multiple valves having multiple valves for multiple output members with additional valves between the groups of valves for multiple output members
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- 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
- F15B2211/31523—Directional control characterised by the connections of the valve or valves in the circuit being connected to a pressure source and an output member
- F15B2211/31535—Directional control characterised by the connections of the valve or valves in the circuit being connected to a pressure source and an output member having multiple pressure sources and a single output member
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- 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
- F15B2211/329—Directional control characterised by the type of actuation actuated by fluid pressure
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- 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
- F15B2211/50536—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means using unloading valves controlling the supply pressure by diverting fluid to the return line
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- 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
- F15B2211/55—Pressure control for limiting a pressure up to a maximum pressure, e.g. by using a pressure relief valve
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- 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
- F15B2211/7142—Multiple output members, e.g. multiple hydraulic motors or cylinders the output members being arranged in multiple groups
Definitions
- the present invention relates to a fluid pressure control circuit and a fluid pressure control device having a plurality of circuit systems.
- a control valve for controlling an actuator is connected to a pair of variable displacement pumps, and an unloading valve is provided between the variable displacement pump and the control valve (load control circuit).
- Sensing circuits are conventionally known.
- valve block When the conventional hydraulic control circuit is configured with a valve block, if various valves are provided in one valve block, the valve block becomes large. When this type of valve block is increased in size, it becomes difficult to put it on the line or to lower it, and it becomes difficult to handle the valve block, resulting in poor workability.
- An object of the present invention is to provide a fluid pressure control circuit and a fluid pressure control device in which each of the valve blocks is not increased in size.
- the fluid pressure control circuit is connected to the first and second pumps.
- the fluid pressure control circuit is a switching valve that allows or blocks communication between the first and second pumps.
- the first and second unload valves for unloading the working fluid discharged from the second pump, respectively, and the switching valve and the first and second unload valves are arranged in separate valve sections. .
- a fluid pressure control device having a plurality of valve blocks includes a first valve block in which first and second pump ports connected to the first and second pumps are formed. And a second valve block in which the first and second unload valves for unloading the working fluid discharged from the first and second pumps, respectively, and a switching for allowing or blocking communication between the first and second pumps. And a switching valve is incorporated in the first valve block.
- FIG. 1 is a circuit diagram of a fluid pressure control apparatus according to an embodiment of the present invention.
- FIG. 2 is a plan view of the fluid pressure control apparatus according to the embodiment of the present invention.
- FIG. 3 is a circuit diagram of a fluid pressure control device according to a comparative example.
- FIG. 4 is a plan view of a fluid pressure control apparatus according to a comparative example.
- FIG. 1 is a diagram showing a fluid pressure control circuit of the fluid pressure control device 100.
- FIG. 2 is a plan view of the fluid pressure control device 100.
- oil, other water-soluble alternative liquid, or the like is used as the working fluid.
- the fluid pressure control device 100 includes first to fifth valve blocks B1 to B5.
- the first valve block B1 is provided with a pair of first and second pump ports P1 and P2, and the first and second pump ports P1 and P2 each have a pair of variable displacement type first and second. Pumps 40 and 50 are connected. Further, a switching valve 21 is incorporated in the first valve block B1. The first and second pumps 40 and 50 communicate with each other or are disconnected from each other according to the switching position of the switching valve 21.
- the first valve block B1 constitutes a valve section in which the switching valve 21 is disposed.
- the second to fourth valve blocks B2 to B4 are sequentially connected to one side (right side of the drawing) of the first valve block B1. Further, an outlet block 22 in which a tank port communicating with the tank T is formed is connected to the outside of the fourth valve block B4 (the side opposite to the third valve block B3).
- the fifth valve block B5 is connected to the other side (left side in the drawing) of the first valve block B1. Although another valve block is also connected to the outside of the fifth valve block B5 (the side opposite to the first valve block B1), it is omitted in FIG.
- the third and fourth valve blocks B3 and B4 correspond to the first control valve block
- the fifth valve block B5 corresponds to the second control valve block.
- each of the third and fourth valve blocks B3 and B4 is controlled as a first control valve that controls actuators 61 and 62 driven by the working fluid discharged from the first pump 40.
- Valves 23 and 24 are incorporated.
- the actuators 61 and 62 are reciprocating fluid pressure cylinders, fluid pressure motors, or the like.
- the outlet block 22 is provided with a first relief valve 26 communicating with the first pump port P1.
- the first valve block B1 is provided with a second relief valve 27 that communicates with the second pump port P2 in accordance with the switching position of the switching valve 21.
- the first relief valve 26 controls the maximum pressure of the first pump 40
- the second relief valve 27 is the second pump. Control a maximum pressure of 50.
- the fifth valve block B5 incorporates a control valve 25 as a second control valve that communicates with the second pump port P2 and controls the actuator 63.
- a control valve 25 as a second control valve that communicates with the second pump port P2 and controls the actuator 63.
- another valve block is provided so as to be connected to the fifth valve block B5, and a control valve for controlling an actuator (not shown) is also provided in this valve block.
- the fluid pressure control device 100 includes a first circuit system S1 that is provided on one side of the first valve block B1 and supplies the working fluid supplied to the first pump port P1 to the actuators 61 and 62 through the control valves 23 and 24. And a second circuit system S2 that is provided on the other side of the first valve block B1 and supplies the working fluid supplied to the second pump port P2 to the actuator 63 through the control valve 25.
- the first valve block B1 is provided at the center of the first and second circuit systems S1, S2. Thereby, the distance of 1st, 2nd pump port P1, P2 and the switching valve 21 and 1st, 2nd circuit system S1, S2 can be arrange
- the first valve block B1 is provided between the third and fourth valve blocks B3 and B4 in which the control valves 23 and 24 are incorporated and the fifth valve block B5 in which the control valve 25 is incorporated. . Thereby, the difference in distance from the first and second pump ports P1, P2 and the switching valve 21 to the control valves 23, 24 and the control valve 25 can be reduced.
- the pressure loss of the working fluid supplied from the first and second pumps 40 and 50 to the first and second circuit systems S1 and S2 can be made substantially equal.
- the switching valve 21 provided in the first valve block B1 includes pilot chambers 21a and 21b.
- One pilot chamber 21 a communicates with the load pressure introduction passage 28 through which the maximum load pressure of the actuators 61, 62, 63 in each circuit system is guided, and the other pilot chamber 21 b communicates with the pilot passage 29.
- a pilot pressure corresponding to the operation of the operator is introduced into the pilot passage 29.
- a pair of first and second unload valves A1 and A2 are incorporated in the second valve block B2.
- the first unload valve A1 is connected to the first pump port P1, and unloads the working fluid discharged to the first pump port P1.
- the second unload valve A2 is connected to the second pump port P2, and unloads the working fluid discharged to the second pump port P2.
- the second valve block B2 constitutes a valve section in which the first and second unload valves A1 and A2 are disposed.
- the pressure of the first pump port P1 is guided to one pilot chamber 30, and the maximum load pressure of the first circuit system S1 is guided to the other pilot chamber 31.
- the pressure of the second pump port P2 is guided to one pilot chamber 32, and the maximum load pressure of the second circuit system S2 is guided to the other pilot chamber 33.
- the same pressure acts on the pilot chambers 30 and 32 when the switching valve 21 is maintained in a communicating state.
- the pressure of the first pump port P1 acts on the pilot chamber 30, and the pressure of the second pump port P2 acts on the pilot chamber 32.
- reference numeral 34 denotes a selection valve provided in the second valve block B2.
- the selection valve 34 selects the higher pressure of the first and second pump ports P1 and P2, and guides the higher pressure to a regulator (not shown) of the first and second pumps 40 and 50. is there.
- Reference numeral 35 denotes a selection valve provided in the second valve block B2. The selection valve 35 guides the higher load pressure of the first and second circuit systems S1 and S2 to the regulators of the first and second pumps 40 and 50.
- the fluid pressure control device 100 joins the working fluid discharged from the first and second pumps 40 and 50 connected to the first and second pump ports P1 and P2 according to the switching position of the switching valve 21, or They can be separated.
- the switching valve 21 can switch the first pump port P1 and the second pump port P2 between the communication state and the cutoff state by the operation of the pilot pressure guided from the pilot passage 29 by the operation of the operator. .
- the first and second unload valves A1 and A2 incorporated in the second valve block B2 are either one of the first and second unload valves A1 and A2 when the switching valve 21 is in communication. An unloading valve is sufficient. However, when the switching valve 21 is in the shut-off state, the first and second unload valves A1 and A2 must function individually. Therefore, in the fluid pressure control apparatus 100 shown in FIG. 1, two first and second unload valves A1 and A2 are provided.
- the fluid pressure control device 110 includes first to fourth valve blocks 1, 4, 5, and 8.
- the first valve block 1 is provided with a pair of first and second pump ports P1 and P2, and the first and second pump ports P1 and P2 have variable displacement type first and second pumps, respectively. 40 and 50 are connected.
- a switching valve 10 is incorporated in the first valve block 1.
- the first and second pumps 40 and 50 communicate with each other or are blocked from communication according to the switching position of the switching valve 10.
- the first valve block 1 is provided with first and second unload valves 11 and 12 and a relief valve 13.
- the first and second unload valves 11 and 12 are provided in the first valve block 1 with the switching valve 10 as the center.
- the second and third valve blocks 4 and 5 are sequentially connected to one side (right side of the drawing) of the first valve block 1.
- the fourth valve block 8 is connected to the other side (left side in the drawing) of the first valve block 1.
- reference numeral 15 denotes an outlet block, which is provided outside the third valve block 5 (on the opposite side to the second valve block 4).
- control valves 6 and 7 communicating with the first pump port P ⁇ b> 1 and controlling the actuators 61 and 62 are incorporated in the second and third valve blocks 4 and 5, respectively.
- the fourth valve block 8 incorporates a control valve 9 that communicates with the second pump port P2 and controls the actuator 63.
- the fluid pressure control device 110 includes a first circuit system S11 that is provided on one side of the first valve block 1 and supplies the working fluid supplied to the pump port 2 to the actuators 61 and 62 through the control valves 6 and 7, When the working fluid provided on the other side of the valve block 1 and supplied to the pump port 3 is supplied to the actuator 63 through the control valve 9, a second circuit system S12 is provided.
- the switching valve 10 when the switching valve 10 is in the communication state (when in the upper position in the drawing), the fluids discharged from the first and second pumps 40 and 50 are merged, and the first and second circuit systems S11. , S12 are led to the control valves 6, 7, and 9.
- the switching valve 10 when the switching valve 10 is in the shut-off state (at the lower position in the drawing), the discharge fluids of the first and second pumps 40 and 50 are individually supplied to the first and second circuit systems S11 and S12, respectively. To supply.
- the first and second unload valves 11 and 12 operate simultaneously at the same pressure when the switching valve 10 is in communication, but when the switching valve 10 is in a shut-off state, the first and second circuit systems S11 and 12 It operates individually with the circuit pressure of S12.
- the relief valve 13 controls the maximum pressure by selecting the higher pressure of the first and second circuit systems S11 and S12 with the selection valve 14.
- the fluid pressure control device 110 configured as described above includes a switching valve 10, first and second unload valves 11 and 12, and a relief valve 13 in the first valve block 1.
- the selection valve 14 (see FIG. 3) is provided in a concentrated manner.
- the first valve block 1 is larger than the second to fourth valve blocks 4, 5, and 8, which are other valve blocks.
- the switching valve 21 and the first and second unload valves A1 and A2 are arranged in separate valve sections. Therefore, as is apparent from FIG. 2, the width of the first valve block B1 can be configured with no great difference from the second to fifth valve blocks B2 to B5.
- the number of parts is increased by the amount corresponding to the second valve block B2 as compared with the fluid pressure control device 110 as the comparative example.
- it is easy to handle the valve block by downsizing the individual valve blocks, and the efficiency of the entire process is improved.
- the working fluid discharged from the first and second pumps 40 and 50 is joined and supplied to the actuators 61 to 63 of the first and second circuit systems S1 and S2.
- the actuators 61 to 63 of the first and second circuit systems S1 and S2 the working fluid discharged from the first and second pumps 40 and 50 may have to be supplied separately.
- the fluid pressure control apparatus 100 of the present embodiment is configured to connect the first and second circuit systems S1 and S2 by the switching valve 21 or to block the communication.
- the first and second relief valves 26 and 27 are provided dispersed in the outlet block 22 and the first valve block B1, so that an increase in the size of the valve block can be prevented.
- the switching valve 21 when the switching valve 21 is in a communication state that allows the first and second pumps 40 and 50 to communicate, the second relief valve 27 is shut off from the second circuit system S2 by the switching valve 21. Is done. Accordingly, only the first relief valve 26 functions at this time.
- the switching valve 21 enters a shut-off state in which the communication between the first and second pumps 40 and 50 is shut off, the first relief valve 26 communicates only with the first circuit system S1, and the second relief valve 27 It communicates only with the two-circuit system S2.
- the first relief valve 26 and the second relief valve 27 can function effectively according to the switching position of the switching valve 21.
- the fluid pressure control circuit includes a switching valve 21 that allows or blocks communication between the first and second pumps 40 and 50, and first and second working fluids that are discharged from the first and second pumps 40 and 50, respectively.
- the switching valve 21 and the first and second unloading valves A1 and A2 are arranged in separate valve sections.
- the switching valve 21 and the first and second unloading valves A1 and A2 are arranged in separate valve sections, so that the switching valve 21 and the first and second unloading valves A1 and A2 are connected to each other. It is not necessary to concentrate on one valve block. Therefore, the specific valve block can be prevented from increasing in size.
- the fluid pressure control circuit includes first and second pump ports P1 and P2 connected to the first and second pumps 40 and 50, respectively, and controls the maximum pressure of the first pump 40 to the first pump port P1.
- the first relief valve 26 is connected
- the second relief valve 27 for controlling the maximum pressure of the second pump 50 is connected to the second pump port P2
- the switching valve 21 communicates with the first and second pumps 40, 50.
- first and second pumps 40 and 50 when the first and second pumps 40 and 50 are communicated or when the communication between the first and second pumps 40 and 50 is interrupted, the first and second pumps 40 and 50 are switched according to the switching position of the switching valve 21.
- Each of the first relief valve 26 and the second relief valve 27 can function effectively.
- the fluid pressure control device 100 having a plurality of valve blocks includes a first valve block B1 formed with first and second pump ports P1 and P2 connected to the first and second pumps 40 and 50, respectively.
- the first and second pumps 40 and 50 communicate with the second valve block B2 in which the first and second unload valves A1 and A2 for unloading the working fluid discharged from the second pumps 40 and 50, respectively.
- a switching valve 21 that allows or blocks the switching valve 21, and the switching valve 21 is incorporated in the first valve block B ⁇ b> 1.
- the switching valve 21 is incorporated in the first valve block B1, and the first and second unload valves A1 and A2 are incorporated in the second valve block B2. Therefore, the switching valve 21 and the first and second valves The unload valves A1 and A2 need not be concentrated on one valve block. Therefore, it can prevent that 1st valve block B1 and 2nd valve block B2 enlarge.
- the fluid pressure control device 100 is discharged from the first control valve (control valves 23 and 24) that controls the actuators 61 and 62 driven by the working fluid discharged from the first pump 40 and the second pump 50.
- a first control valve block (third and fourth valve blocks) in which a second control valve (control valve 25) for controlling the actuator 63 driven by the working fluid is incorporated, and a first control valve (control valves 23, 24).
- Block (fifth valve block B5) is provided.
- the difference in distance from the first and second pump ports P1 and P2 and the switching valve 21 to the control valves 23 and 24 and the control valve 25 can be reduced. That is, when the switching valve 21 is in the communication state, the pressure loss of the working fluid supplied from the first and second pumps 40 and 50 to the control valves 23 and 24 and the control valve 25 can be made substantially equal.
- the fluid pressure control device 100 includes a first relief valve 26 that controls the maximum pressure of the first pump 40 and a second relief valve 27 that controls the maximum pressure of the second pump 50, and the switching valve 21 is When the first and second pumps 40 and 50 are in communication with each other, the first and second pumps 40 and 50 and the first relief valve 26 communicate with each other, and the first and second pumps 40 and 50 and the second pump 40 and 50 communicate with each other. 2 Communication with the relief valve 27 is blocked.
- first and second pumps 40 and 50 when the first and second pumps 40 and 50 are communicated or when the communication between the first and second pumps 40 and 50 is interrupted, the first and second pumps 40 and 50 are switched according to the switching position of the switching valve 21.
- Each of the first relief valve 26 and the second relief valve 27 can function effectively.
- the fluid pressure control device 100 further includes an outlet block 22 in which a tank port communicating with the tank T is formed, the first relief valve 26 is provided in the outlet block 22, and the second relief valve 27 is the first valve block. B1 is provided.
- the pair of pumps 40 and 50 has been described by taking a variable capacity type as an example, but may be a fixed capacity type. Further, although the maximum load pressure is guided to the first and second unload valves A1 and A2, it may be switched by other pressures.
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- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
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- General Engineering & Computer Science (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
Description
Claims (6)
- 第1、第2ポンプに接続される流体圧制御回路であって、
前記第1、第2ポンプの連通を許容又は遮断する切換バルブと、
前記第1、第2ポンプから吐出される作動流体をそれぞれアンロードする第1、第2アンロードバルブと、を備え、
前記切換バルブと前記第1、第2アンロードバルブとは、別々のバルブセクションに配置される流体圧制御回路。 - 請求項1に記載の流体圧制御回路であって、
前記第1、第2ポンプにそれぞれ接続される第1、第2ポンプポートを備え、
前記第1ポンプポートに前記第1ポンプの最高圧を制御する第1リリーフバルブを接続し、
前記第2ポンプポートに前記第2ポンプの最高圧を制御する第2リリーフバルブを接続し、
前記切換バルブが前記第1、第2ポンプを連通する連通状態にあるとき、前記第1、第2ポンプと前記第1リリーフバルブとが連通するとともに、前記第1、第2ポンプと前記第2リリーフバルブとの連通が遮断される流体圧制御回路。 - 複数のバルブブロックを有する流体圧制御装置であって、
第1、第2ポンプにそれぞれ接続される第1、第2ポンプポートが形成される第1バルブブロックと、
前記第1、第2ポンプから吐出される作動流体をそれぞれアンロードする第1、第2アンロードバルブが組み込まれる第2バルブブロックと、
前記第1、第2ポンプの連通を許容又は遮断する切換バルブと、を備え、
前記切換バルブは前記第1バルブブロックに組み込まれる流体圧制御装置。 - 請求項3に記載の流体圧制御装置であって、
前記第1ポンプから吐出される作動流体によって駆動されるアクチュエータを制御する第1制御バルブと、
前記第2ポンプから吐出される作動流体によって駆動されるアクチュエータを制御する第2制御バルブと、
前記第1制御バルブが組み込まれる第1制御バルブブロックと、
前記第2制御バルブが組み込まれる第2制御バルブブロックと、をさらに有し、
前記第1バルブブロックの一方側には、前記第1制御バルブブロックが設けられ、
前記第1バルブブロックの他方側には、前記第2制御バルブブロックが設けられる流体圧制御装置。 - 請求項3に記載の流体圧制御装置であって、
前記第1ポンプの最高圧を制御する第1リリーフバルブと、
前記第2ポンプの最高圧を制御する第2リリーフバルブと、を備え、
前記切換バルブが前記第1、第2ポンプの連通を許容する連通状態にあるとき、前記第1、第2ポンプと前記第1リリーフバルブとが連通するとともに、前記第1、第2ポンプと前記第2リリーフバルブとの連通が遮断される流体圧制御装置。 - 請求項5に記載の流体圧制御装置であって、
タンクと連通するタンクポートが形成されるアウトレットブロックをさらに備え、
前記第1リリーフバルブは前記アウトレットブロックに設けられ、
前記第2リリーフバルブは前記第1バルブブロックに設けられる流体圧制御装置。
Priority Applications (4)
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DE112016004734.7T DE112016004734T5 (de) | 2015-10-16 | 2016-09-08 | Fluiddrucksteuerschaltung und Fluiddrucksteuervorrichtung |
US15/765,892 US20180283410A1 (en) | 2015-10-16 | 2016-09-08 | Fluid pressure control circuit and fluid pressure control device |
CN201680057183.8A CN108138804A (zh) | 2015-10-16 | 2016-09-08 | 流体压控制回路和流体压控制装置 |
KR1020187007844A KR20180043313A (ko) | 2015-10-16 | 2016-09-08 | 유체압 제어 회로와 유체압 제어 장치 |
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JP2015-204833 | 2015-10-16 | ||
JP2015204833A JP6541545B2 (ja) | 2015-10-16 | 2015-10-16 | ロードセンシング回路とそのバルブ構造 |
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WO2017064953A1 true WO2017064953A1 (ja) | 2017-04-20 |
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US (1) | US20180283410A1 (ja) |
JP (1) | JP6541545B2 (ja) |
KR (1) | KR20180043313A (ja) |
CN (1) | CN108138804A (ja) |
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WO (1) | WO2017064953A1 (ja) |
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JP6355606B2 (ja) * | 2015-10-16 | 2018-07-11 | Kyb株式会社 | ロードセンシング回路におけるバルブ構造 |
Citations (2)
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JPS58146633A (ja) * | 1982-02-26 | 1983-09-01 | Sumitomo Heavy Ind Ltd | 油圧シヨベル等の油圧回路 |
JPH0425603A (ja) * | 1990-05-18 | 1992-01-29 | Zexel Corp | スタック型油圧制御弁装置 |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
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DE68912305T2 (de) * | 1988-06-17 | 1994-05-11 | Kobe Steel Ltd | Fluid-steuerungsmechanismus für kraftschaufeln. |
US5115835A (en) * | 1990-01-26 | 1992-05-26 | Zexel Corporation | Stacked type hydraulic control valve system |
CN101230870A (zh) * | 2008-02-19 | 2008-07-30 | 湖南三一起重机械有限公司 | 起重机执行机构流量控制模块 |
JP2013079552A (ja) | 2011-10-05 | 2013-05-02 | Komatsu Ltd | 作業車両 |
SG11201403830WA (en) | 2012-01-03 | 2014-10-30 | Philip Morris Products Sa | Power supply system for portable aerosol-generating device |
CN102536932A (zh) * | 2012-01-11 | 2012-07-04 | 中联重科股份有限公司 | 压缩垃圾车及其液压系统 |
DE102012010847A1 (de) * | 2012-05-31 | 2013-12-05 | Liebherr-France Sas | Hydraulischer Steuerblock und Hydrauliksystem |
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2015
- 2015-10-16 JP JP2015204833A patent/JP6541545B2/ja active Active
-
2016
- 2016-09-08 WO PCT/JP2016/076492 patent/WO2017064953A1/ja active Application Filing
- 2016-09-08 DE DE112016004734.7T patent/DE112016004734T5/de not_active Withdrawn
- 2016-09-08 KR KR1020187007844A patent/KR20180043313A/ko not_active Application Discontinuation
- 2016-09-08 CN CN201680057183.8A patent/CN108138804A/zh active Pending
- 2016-09-08 US US15/765,892 patent/US20180283410A1/en not_active Abandoned
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58146633A (ja) * | 1982-02-26 | 1983-09-01 | Sumitomo Heavy Ind Ltd | 油圧シヨベル等の油圧回路 |
JPH0425603A (ja) * | 1990-05-18 | 1992-01-29 | Zexel Corp | スタック型油圧制御弁装置 |
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US20180283410A1 (en) | 2018-10-04 |
JP2017075681A (ja) | 2017-04-20 |
KR20180043313A (ko) | 2018-04-27 |
JP6541545B2 (ja) | 2019-07-10 |
CN108138804A (zh) | 2018-06-08 |
DE112016004734T5 (de) | 2018-07-19 |
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