WO2013115053A1 - ハイブリッド建設機械 - Google Patents
ハイブリッド建設機械 Download PDFInfo
- Publication number
- WO2013115053A1 WO2013115053A1 PCT/JP2013/051433 JP2013051433W WO2013115053A1 WO 2013115053 A1 WO2013115053 A1 WO 2013115053A1 JP 2013051433 W JP2013051433 W JP 2013051433W WO 2013115053 A1 WO2013115053 A1 WO 2013115053A1
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- valve
- passage
- logic valve
- logic
- pump
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/22—Hydraulic or pneumatic drives
- E02F9/2278—Hydraulic circuits
- E02F9/2292—Systems with two or more pumps
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/2058—Electric or electro-mechanical or mechanical control devices of vehicle sub-units
- E02F9/2095—Control of electric, electro-mechanical or mechanical equipment not otherwise provided for, e.g. ventilators, electro-driven fans
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/22—Hydraulic or pneumatic drives
- E02F9/2217—Hydraulic or pneumatic drives with energy recovery arrangements, e.g. using accumulators, flywheels
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/22—Hydraulic or pneumatic drives
- E02F9/2221—Control of flow rate; Load sensing arrangements
- E02F9/2239—Control of flow rate; Load sensing arrangements using two or more pumps with cross-assistance
- E02F9/2242—Control of flow rate; Load sensing arrangements using two or more pumps with cross-assistance including an electronic controller
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/22—Hydraulic or pneumatic drives
- E02F9/2264—Arrangements or adaptations of elements for hydraulic drives
- E02F9/2267—Valves or distributors
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/22—Hydraulic or pneumatic drives
- E02F9/2278—Hydraulic circuits
- E02F9/2296—Systems with a variable displacement pump
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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
-
- 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
-
- 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
- F15B11/08—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor
-
- 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
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/001—Servomotor systems with fluidic 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
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/14—Energy-recuperation means
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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
- F15B7/00—Systems in which the movement produced is definitely related to the output of a volumetric pump; Telemotors
- F15B7/001—With multiple inputs, e.g. for dual 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
- F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
- F15B2211/205—Systems with pumps
- F15B2211/20576—Systems with pumps with multiple pumps
-
- 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
- F15B2211/265—Control of multiple pressure sources
- F15B2211/2654—Control of multiple pressure sources one or more pressure sources having priority
-
- 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
- F15B2211/355—Pilot 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
- F15B2211/40—Flow control
- F15B2211/405—Flow control characterised by the type of flow control means or valve
- F15B2211/40515—Flow control characterised by the type of flow control means or valve with variable throttles or orifices
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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
- F15B2211/40—Flow control
- F15B2211/405—Flow control characterised by the type of flow control means or valve
- F15B2211/40546—Flow control characterised by the type of flow control means or valve with flow combiners
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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
- F15B2211/40—Flow control
- F15B2211/405—Flow control characterised by the type of flow control means or valve
- F15B2211/40576—Assemblies of multiple valves
Definitions
- the present invention relates to a hybrid construction machine.
- JP2011-241947A discloses a hybrid construction machine capable of adding the discharge pressure of an assist pump driven by a motor to the discharge pressure of a main pump driven by an engine.
- the hybrid construction machine includes a variable capacity first main pump and a second main pump.
- the first main pump is connected to the first circuit system via the first supply passage, and a plurality of operation valves are connected to the first circuit system.
- An output port of the first logic valve is connected to the first supply passage.
- the input port of the first logic valve is always in communication with the variable displacement type assist pump via the junction passage.
- the second main pump is connected to the second circuit system via the second supply passage, and a plurality of operation valves are connected to the second circuit system.
- a second logic valve is interposed in the second supply passage.
- the input port of the second logic valve is connected to the second main pump via the second supply passage on the upstream side of the second logic valve.
- the output port of the second logic valve is connected to the second circuit system via the second supply passage on the downstream side of the second logic valve.
- variable displacement type assist pump rotates integrally with the variable displacement type hydraulic motor and motor generator.
- the motor generator is connected to the battery via an inverter. Therefore, if the hydraulic motor rotates, the motor generator rotates to generate electric power, and the generated electric power is stored in the battery via the inverter.
- a switching valve is connected to the second supply passage.
- the switching valve normally maintains a neutral position by the action of the centering spring, and connects the joining passage communicating with the assist pump to the second supply passage via the branch passage.
- the branch passage is provided with a check valve that allows only the flow from the switching valve to the second supply passage.
- the assist pump is connected in parallel to the first main pump and the second main pump via the junction passage.
- the assist pump is connected to the second main pump through a branch passage provided with a check valve. Since the opening of the check valve is limited, the pressure loss in the path from the assist pump to the second main pump is larger than the pressure loss in the path from the assist pump to the first main pump, and the pressure balance between the two is There is a possibility of collapse.
- An object of the present invention is to provide a first main in the case where an assist pump driven using a power source different from the first main pump and the second main pump is connected in parallel to the first main pump and the second main pump. It is an object of the present invention to provide a hybrid construction machine capable of maintaining a balance of pressures joining the pump and the second main pump.
- the hybrid construction machine includes a first main pump and a second main pump, a first circuit system connected to the first main pump through the first supply passage, and a second main pump.
- a second circuit system connected to the second main pump via the supply passage, a hydraulic motor connected to the second main pump, a motor generator rotating by the driving force of the hydraulic motor, and rotating by the driving force of the motor generator
- An assist pump a merged passage that is connected to the assist pump and branches from the middle into one branch passage and the other branch passage, and a first logic interposed between the one branch passage and the first supply passage
- a valve a second logic valve interposed in the second supply passage, a state where the assist pump is connected to the second supply passage on the upstream side of the second logic valve,
- a switching valve that can switch between a state in which the in-pump is connected to the hydraulic motor, and a check valve that is provided on the downstream side of the switching valve in the other branch passage and allows only the flow from the assist pump to the second logic valve;
- FIG. 1 is a circuit diagram showing a hydraulic control circuit of a hybrid construction machine according to an embodiment of the present invention.
- FIG. 2 is a cross-sectional view showing a cross section of the valve body.
- FIG. 1 is a circuit diagram showing a hydraulic control circuit of a hybrid construction machine according to an embodiment of the present invention.
- the hydraulic control circuit is provided with a variable displacement first main pump MP1 and second main pump MP2 linked to the engine E, and a generator G that generates electric power as the engine E rotates.
- the first main pump MP1 is directly connected to the first circuit system S1 having a plurality of operation valves via the first supply passage 1.
- the first supply passage 1 is connected to the output port 2b of the input port 2a and the output port 2b provided in the first logic valve 2.
- the second main pump MP2 is connected via a second supply passage 3 to a second circuit system S2 having a plurality of operation valves.
- a second logic valve 4 is provided in the passage process of the second supply passage 3.
- the second supply passage 3 includes an upstream supply passage 3a disposed on the upstream side of the second logic valve 4 and a downstream supply passage 3b disposed on the downstream side of the second logic valve.
- the input port 4a of the second logic valve 4 is connected to the upstream supply passage 3a, and the output port 4b of the second logic valve 4 is connected to the downstream supply passage 3b. Accordingly, the oil discharged from the second main pump MP2 is supplied to the second circuit system S2 via the second logic valve 4.
- the hydraulic control circuit is provided with an assist pump AP separately from the first main pump MP1 and the second main pump MP2.
- the assist pump AP rotates with the driving force of the motor generator MG.
- Motor generator MG is rotated by the driving force of hydraulic motor M.
- the hydraulic motor M is connected to the upstream supply passage 3 a via the connection passage 6 connected to the switching valve 5.
- the merging passage 7 is connected to the assist pump AP.
- the merge passage 7 branches into a branch passage 7a and a branch passage 7b.
- One branch passage 7a is directly connected to the input port 2a of the first logic valve 2. Therefore, the discharge oil of the assist pump AP supplied to one branch passage 7a is supplied to the first circuit system S1 via the first logic valve 2.
- the other branch passage 7b is connected to the upstream supply passage 3a via the switching valve 5 and a check valve 8 provided downstream of the switching valve 5.
- the check valve 8 allows only the flow from the assist pump AP to the upstream supply passage 3a.
- the switching valve 5 is a three-position switching valve, and when in the neutral position shown in the figure, the branch passage 7b is kept in communication and the connection passage 6 is shut off. Thereby, the discharge oil of the assist pump AP is supplied to the input port 2a of the first logic valve 2 via one branch passage 7a and to the upstream supply passage 3a via the other branch passage 7b. Supplied.
- the branch passage 7b is blocked and the connection passage 6 is communicated.
- the second main pump MP2 communicates with the hydraulic motor M via the upstream supply passage 3a and the connection passage 6.
- bypass passage 9 that branches from between the switching valve 5 and the check valve 8 is provided in the branch passage 7b.
- the bypass passage 9 is directly connected to the downstream supply passage 3b.
- the bypass passage 9 is provided with a check valve 10 that allows only the flow from the assist pump AP to the downstream supply passage 3b.
- the switching valve 5 has a pilot chamber 5a and a pilot chamber 5b.
- An electromagnetic switching valve 11 is connected to the pilot chamber 5a, and an electromagnetic switching valve 12 is connected to the pilot chamber 5b.
- the pilot pressure from the pilot pump PP is guided to the switching valve 5 via the electromagnetic switching valves 11 and 12.
- the switching valve 5 is switched to a neutral position, a left position, or a right position by the action of the pilot pressure.
- the pilot chamber 2 c of the first logic valve 2 is connected to the first supply passage 1 via the on-off valve 13.
- the pilot chamber 4 c of the second logic valve 4 is connected to the downstream supply passage 3 b via the on-off valve 14.
- the on-off valves 13 and 14 have a fully open position, a closed position, and a throttle control position, and are in a fully open position, a closed position, or a throttle control position in accordance with the pilot pressure in each pilot chamber 13a and 14a of the on / off valves 13 and 14. Can be switched.
- Electromagnetic switching valves 11 and 15 are connected to the pilot chambers 13a and 14a of the on-off valves 13 and 14, respectively.
- the on-off valves 13 and 14 are switched by the pilot pressure from the pilot pump PP guided through the electromagnetic switching valves 11 and 15.
- the electromagnetic switching valve 11 is also connected to one pilot chamber 5 a of the switching valve 5.
- each of the pilot chamber 5 a of the switching valve 5 and the pilot chamber 14 a of the on-off valve 14 communicates with the drain passage 16.
- the solenoid of the electromagnetic switching valve 11 is excited by the control signal from the controller C, the electromagnetic switching valve 11 is switched to the switching position.
- pilot pressure of pilot pump PP is guide
- the electromagnetic switching valve 15 When the electromagnetic switching valve 15 is in the neutral position shown in FIG. 1, the pilot chamber 13 a of the on-off valve 13 communicates with the drain passage 16. On the other hand, when the solenoid of the electromagnetic switching valve 15 is excited by the control signal from the controller C, the electromagnetic switching valve 15 is switched to the switching position. Thereby, the pilot pressure of the pilot pump PP is guided to the pilot chamber 13 a of the on-off valve 13.
- Controller C outputs a control signal according to the operation of the operator.
- the operator can switch each of the electromagnetic switching valves 11, 12 and 15 simultaneously to the switching position, or can switch each individually.
- the controller C When causing the motor generator MG to exhibit the power generation function, the controller C outputs a control signal to switch the electromagnetic switching valve 11 to the switching position.
- the electromagnetic switching valve 11 When the electromagnetic switching valve 11 is switched to the switching position, the pilot pressure of the pilot pump PP is guided to one of the pilot chambers 5 a of the switching valve 5 and the pilot chamber 14 a of the on-off valve 14.
- the controller C keeps the solenoid of the electromagnetic switching valve 12 in a non-excited state and causes the other pilot chamber 5 b of the switching valve 5 to communicate with the drain passage 16.
- the on-off valve 14 When the pilot pressure is introduced to the pilot chamber 14a of the on-off valve 14, the on-off valve 14 is switched to the closed position by the pressure action of the pilot chamber 14a. Then, since the pilot chamber 4c of the second logic valve 4 is closed, the second logic valve 4 is kept closed.
- the discharge oil from the second main pump MP2 is supplied to the hydraulic motor M via the connection passage 6 and the switching valve 5 without being guided to the second circuit system S2, and rotates the hydraulic motor M.
- the motor generator MG rotates to generate electric power, and the generated electric power is charged in the battery 64 via the inverter I.
- the battery 64 also stores electric power generated by the generator G directly connected to the engine E.
- the controller C outputs a control signal to turn on the solenoids of the electromagnetic switching valves 11, 12 and 15. All are de-energized.
- the electromagnetic switching valves 11, 12 and 15 are maintained in the neutral position shown in the figure, and the pilot chambers 5 a and 5 b of the switching valve 5 and the pilot chambers 13 a and 14 a of the on-off valves 13 and 14 communicate with the drain passage 16.
- the on-off valve 13 Since the pilot chamber 13a of the on-off valve 13 communicates with the drain passage 16, the on-off valve 13 is maintained at the fully open position, which is the neutral position shown in the figure. In this state, when the discharge oil of the assist pump AP flows into the first logic valve 2 from the branch passage 7a, the first logic valve 2 is opened.
- the discharge oil of the assist pump AP supplied to the branch passage 7a joins the first supply passage 1 via the first logic valve 2 and is supplied to the first circuit system S1.
- the switching valve 5 Since the pilot chambers 5a and 5b of the switching valve 5 communicate with the drain passage 16 as described above, the switching valve 5 is maintained at the neutral position shown in the figure, and the branch passage 7b and the bypass passage 9 of the merging passage 7 are assisted pumps. Communicate with AP. At this time, since the pilot chamber 14a of the on-off valve 14 is also in communication with the drain passage 16, the on-off valve 14 is maintained in the fully open position, which is the neutral position shown in the figure. When the on-off valve 14 is kept in the fully open position, the pilot chamber 4c of the second logic valve 4 communicates with the second supply passage 3, so that the pressure in the branch passage 7b acts on the second logic valve 4 and the second logic valve 4 is in communication. Valve 4 opens.
- the discharge oil of the assist pump AP is supplied from the branch passage 7b to the second circuit system S2 through the second logic valve 4, and is directly supplied to the second circuit system S2 through the bypass passage 9. .
- the pressure loss in the bypass passage 9 also depends on the opening degree of the check valve 10. However, since the total opening degree of the check valve 8 of the branch passage 7b and the check valve 10 of the bypass passage 9 becomes the flow passage area, the pressure loss is smaller than the case of only the branch passage 7b.
- controller C outputs an operation signal in accordance with the operation of the operator to control the opening degree of the electromagnetic switching valve 11 or the electromagnetic switching valve 15, and either the on-off valve 13 or the on-off valve 14 is set to the closed position or the full open state. It is also possible to keep the aperture control position between the positions. In this case, the opening degree of the first logic valve 2 or the second logic valve 4 can be controlled according to the throttle opening degree.
- FIG. 2 is a cross-sectional view showing a cross section of the valve body 17 having the hydraulic control circuit.
- the spool S of the switching valve 5 is slidably incorporated in the valve body 17.
- the spool S is disposed so that both ends thereof face the pilot chambers 5a and 5b.
- a centering spring 18 is provided in the pilot chamber 5b.
- the valve body 17 is formed with an input port 2a and an output port 2b of the first logic valve 2 incorporated in the valve body 17, and an input port 4a and an output port of the second logic valve 4 incorporated in the valve body 17 4b is formed. Further, the valve body 17 is formed with a connection passage 6 and a junction passage 7 connected to the assist pump AP. One branch passage 7a of the merging passage 7 is always in communication with the input port 2a of the first logic valve 2 regardless of the switching position of the spool S.
- the upstream supply passage 3 a of the second supply passage 3 is opened in the valve body 17, and the upstream supply passage 3 a communicates with the input port 4 a of the second logic valve 4.
- first to fourth annular grooves 19 to 22 are formed in order from the right side of the drawing.
- the first annular groove 19 is located at a branch point between the branch passage 7a and the branch passage 7b formed in the valve body 17. Therefore, the branch passage 7a always communicates with the assist pump AP via the first annular groove 19 regardless of the switching position of the spool S.
- the second annular groove 20 is located at a branch point between the branch passage 7 b and the bypass passage 9 formed in the valve body 17.
- the third annular groove 21 is located in the middle of the passage that connects the branch passage 7b and the upstream supply passage 3a.
- the fourth annular groove 22 is formed in the middle of the connection passage 6.
- a first annular recess 23 and a second annular recess 24 are formed in the spool S in order from the right side of the drawing.
- the first annular recess 23 is arranged from the first annular groove 19 to the second annular groove 20, and the first annular groove 19, the second annular groove 20, Keep in communication.
- the merging passage 7 communicating with the assist pump AP communicates with the branch passage 7 a, and the branch passage 7 b and the bypass passage via the first annular groove 19, the first annular recess 23, and the second annular groove 20.
- the fourth annular groove 22 faces the second annular recess 24 and communication with other passages is blocked.
- connection passage 6 communicates with the upstream supply passage 3 a via the fourth annular groove 22, the second annular recess 24, and the third annular groove 21.
- the poppet diameter of the poppet p1 of the first logic valve 2 is set smaller than the poppet diameter of the poppet p2 of the second logic valve 4.
- the on-off valve 13 controls the pilot pressure in the pilot chamber 2 c of the first logic valve 2 and switches to the closed position, the throttle control position, or the open position according to the switching position of the electromagnetic switching valve 15. Is possible.
- illustration of the electromagnetic switching valve 15 is abbreviate
- a cylindrical portion 25 is formed in the poppet p1 of the first logic valve 2, and a plurality of small diameter holes 25a and a plurality of large diameter holes 25b are formed around the cylindrical portion 25.
- the pressure loss of the pressure oil flowing through the first supply passage 1 can be adjusted by adjusting the hole diameters of the small diameter hole 25a and the large diameter hole 25b, and the first supply passage 1 and the second supply passage 3
- the supply oil can be evenly distributed by making the pressure loss of the same.
- the on-off valve 14 controls the pilot pressure in the pilot chamber 4c of the second logic valve, and switches to the closed position, the throttle control position, or the open position according to the switching position of the electromagnetic switching valve 11. Is possible.
- illustration of the electromagnetic switching valve 11 is abbreviate
- the discharged oil supplied to the branch passage 7a flows into the input port 2a of the first logic valve 2.
- the first logic valve 2 is opened by the pressure on the input port 2a side, and the large-diameter hole 25b opens to the output port 2b.
- the discharge oil of the assist pump AP guided to the branch passage 7a is guided to the first supply passage 1 via the output port 2b, and merges with the discharge oil of the first main pump MP1 to form the first circuit system S1. To be supplied.
- the discharge oil of the assist pump AP supplied from the second annular groove 20 to the branch passage 7b is guided to the upstream supply passage 3a via the check valve 8 provided in the branch passage 7b, and discharged from the second main pump MP2.
- the oil merges and is guided to the input port 4 a of the second logic valve 4.
- the second logic valve 4 is opened by the pressure of the combined oil introduced to the input port 4a.
- the merged oil guided to the input port 4a is guided to the output port 4b and flows out from the output port 4b to the downstream supply passage 3b.
- the discharge oil of the assist pump AP guided from the second annular groove 20 to the bypass passage 9 flows out to the downstream supply passage 3b via the check valve 10. That is, the discharge oil of the assist pump AP guided to the second annular groove 20 is routed from the branch passage 7 b to the downstream supply passage 3 b via the second logic valve 4 and the bypass passage 9. The flow is divided into a route guided to the downstream supply passage 3b. These routes join in the downstream supply passage 3b.
- the poppet diameter of the poppet p1 of the first logic valve 2 is set smaller than the poppet diameter of the poppet p2 of the second logic valve 4, when both the logic valves 2, 4 are opened simultaneously, the first logic valve The pressure loss of 2 is larger.
- the poppet diameter of the poppet p1 of the first logic valve 2 is relatively reduced, while the pressure loss of the passing hydraulic oil is relatively increased.
- the pressure loss is reduced by providing the bypass passage 9 in parallel. That is, the pressure loss of the pressure oil led from the assist pump AP to both circuit systems S1 and S2 can be adjusted by positively increasing the pressure loss on the one hand and reducing the pressure loss on the other hand. The deterioration of the operational feeling can be suppressed.
- the opening degree of the first logic valve 2 and the second logic valve 4 can be controlled according to the throttle opening degree of the on-off valves 13 and 14.
- the opening degree of the first logic valve 2 can be controlled to an opening degree where only the small diameter hole 25a opens according to the throttle opening degree.
- the pressure loss of the pressure oil led to the first circuit system S1 and the second circuit system S2 under various conditions.
- the opening degree of the first logic valve 2 is relatively increased, and the first circuit system S1 is Pressure oil can be supplied preferentially.
- the pilot pressure is guided to one pilot chamber 5 a of the switching valve 5, and the other pilot chamber 5 b communicates with the drain passage 16.
- the spool S moves to the right in FIG. 2 by the pressure in one pilot chamber 5a, and the switching valve 5 is switched to the left position in FIG. Thereby, as shown in FIG. 2, the upstream supply passage 3 a and the connection passage 6 communicate with each other through the second annular recess 24.
- the discharge oil of the second main pump MP2 is guided from the upstream supply passage 3a to the connection passage 6 via the third annular groove 21, the second annular recess 24, and the fourth annular groove 22, and the connection passage 6 To the hydraulic motor M.
- the hydraulic motor M rotates and the motor generator MG rotates to exert a power generation function.
- the power generation efficiency can be increased by setting the tilt angle of the assist pump AP to zero and the discharge amount to zero.
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Abstract
Description
Claims (4)
- ハイブリッド建設機械であって、
第1メインポンプ及び第2メインポンプと、
第1供給通路を介して前記第1メインポンプと接続される第1回路系統と、
第2供給通路を介して前記第2メインポンプと接続される第2回路系統と、
前記第2メインポンプに接続される油圧モータと、
前記油圧モータの駆動力で回転するモータジェネレータと、
前記モータジェネレータの駆動力で回転するアシストポンプと、
前記アシストポンプに接続され、途中から一方の分岐通路と他方の分岐通路とに分岐する合流通路と、
前記一方の分岐通路と前記第1供給通路との間に介装された第1ロジック弁と、
前記第2供給通路に介装された第2ロジック弁と、
前記他方の分岐通路に介装され、前記アシストポンプが前記第2ロジック弁の上流側の前記第2供給通路に接続する状態と、前記第2メインポンプが前記油圧モータに接続する状態と、を切り換え可能な切換弁と、
前記他方の分岐通路における前記切換弁より下流側に設けられ、前記アシストポンプから前記第2ロジック弁への流通のみを許容するチェック弁と、
を備え、
前記第1ロジック弁のポペット径が、前記第2ロジック弁のポペット径よりも小さい、
ハイブリッド建設機械。 - 請求項1に記載のハイブリッド建設機械であって、
前記第1ロジック弁のパイロット室には開閉弁が設けられ、
前記開閉弁は、全開位置、閉位置及び絞り制御位置のいずれかに切り換え可能である、
ハイブリッド建設機械。 - 請求項1に記載のハイブリッド建設機械であって、
前記第2ロジック弁のパイロット室には開閉弁が設けられ、
前記開閉弁は、全開位置、閉位置及び絞り制御位置のいずれかに切り換え可能である、
ハイブリッド建設機械。 - 請求項1に記載のハイブリッド建設機械であって、
前記第1ロジック弁のポペットには筒部が形成され、
前記筒部の周囲であって、前記ポペットの開弁方向前方に複数の小径孔が形成され、開弁方向後方に複数の大径孔が形成される、
ハイブリッド建設機械。
Priority Applications (4)
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CN201380006305.7A CN104067001B (zh) | 2012-02-03 | 2013-01-24 | 混合动力建筑机械 |
KR1020147021120A KR101652612B1 (ko) | 2012-02-03 | 2013-01-24 | 하이브리드 건설 기계 |
US14/374,281 US9410307B2 (en) | 2012-02-03 | 2013-01-24 | Hybrid construction machine |
EP13744241.4A EP2811171B1 (en) | 2012-02-03 | 2013-01-24 | Hybrid construction machine |
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JP2012-022286 | 2012-02-03 | ||
JP2012022286A JP5762328B2 (ja) | 2012-02-03 | 2012-02-03 | 建設機械の制御装置 |
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WO2013115053A1 true WO2013115053A1 (ja) | 2013-08-08 |
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PCT/JP2013/051433 WO2013115053A1 (ja) | 2012-02-03 | 2013-01-24 | ハイブリッド建設機械 |
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US (1) | US9410307B2 (ja) |
EP (1) | EP2811171B1 (ja) |
JP (1) | JP5762328B2 (ja) |
KR (1) | KR101652612B1 (ja) |
CN (1) | CN104067001B (ja) |
WO (1) | WO2013115053A1 (ja) |
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JP6043409B1 (ja) * | 2015-07-10 | 2016-12-14 | Kyb株式会社 | 棒状部材及びバルブ装置 |
DE102018204854A1 (de) * | 2018-03-29 | 2019-10-02 | Robert Bosch Gmbh | Ventilanordnung mit einem Hauptschieber und zwei Steuerschiebern |
CN108561361B (zh) * | 2018-06-25 | 2024-03-08 | 圣邦集团有限公司 | 一种二通插装逻辑阀和滑阀组成的切换回路 |
JP7304776B2 (ja) * | 2019-09-03 | 2023-07-07 | 川崎重工業株式会社 | 制御弁装置、及びそれを備える油圧駆動システム |
CN113027874B (zh) * | 2021-03-11 | 2022-05-27 | 中联重科股份有限公司 | 混凝土泵送设备能量回收***、方法及混凝土泵送设备 |
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JPS6113006A (ja) | 1984-06-27 | 1986-01-21 | 川崎重工業株式会社 | 複合材製品の接手構造 |
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WO2009119705A1 (ja) * | 2008-03-26 | 2009-10-01 | カヤバ工業株式会社 | ハイブリッド建設機械の制御装置 |
JP4942699B2 (ja) * | 2008-04-25 | 2012-05-30 | カヤバ工業株式会社 | ハイブリッド建設機械の制御装置 |
CN102182730A (zh) * | 2011-05-05 | 2011-09-14 | 四川省成都普什机电技术研究有限公司 | 带势能回收装置的挖掘机动臂流量再生*** |
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2012
- 2012-02-03 JP JP2012022286A patent/JP5762328B2/ja not_active Expired - Fee Related
-
2013
- 2013-01-24 EP EP13744241.4A patent/EP2811171B1/en not_active Not-in-force
- 2013-01-24 KR KR1020147021120A patent/KR101652612B1/ko active IP Right Grant
- 2013-01-24 CN CN201380006305.7A patent/CN104067001B/zh not_active Expired - Fee Related
- 2013-01-24 WO PCT/JP2013/051433 patent/WO2013115053A1/ja active Application Filing
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JPS6113006U (ja) * | 1984-06-29 | 1986-01-25 | 東芝機械株式会社 | 油圧合流制御回路 |
JPH09268604A (ja) * | 1996-03-30 | 1997-10-14 | Samsung Heavy Ind Co Ltd | 重装備用の流量合流装置 |
JP2011163291A (ja) * | 2010-02-12 | 2011-08-25 | Kyb Co Ltd | ハイブリッド建設機械の制御装置 |
JP2011174491A (ja) * | 2010-02-23 | 2011-09-08 | Kyb Co Ltd | ハイブリッド建設機械の制御装置 |
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Also Published As
Publication number | Publication date |
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CN104067001B (zh) | 2016-03-30 |
JP2013160294A (ja) | 2013-08-19 |
KR20140116449A (ko) | 2014-10-02 |
US20150033727A1 (en) | 2015-02-05 |
CN104067001A (zh) | 2014-09-24 |
KR101652612B1 (ko) | 2016-08-30 |
EP2811171B1 (en) | 2016-10-05 |
EP2811171A4 (en) | 2015-12-16 |
US9410307B2 (en) | 2016-08-09 |
JP5762328B2 (ja) | 2015-08-12 |
EP2811171A1 (en) | 2014-12-10 |
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