CN102128183B - Positive feedback high-flow rate inserting type multichannel reversing valve hydraulic control system - Google Patents
Positive feedback high-flow rate inserting type multichannel reversing valve hydraulic control system Download PDFInfo
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- CN102128183B CN102128183B CN 201110099479 CN201110099479A CN102128183B CN 102128183 B CN102128183 B CN 102128183B CN 201110099479 CN201110099479 CN 201110099479 CN 201110099479 A CN201110099479 A CN 201110099479A CN 102128183 B CN102128183 B CN 102128183B
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Abstract
The invention relates to a positive feedback high-flow rate inserting type multichannel reversing valve hydraulic control system, and in particular relates to a positive feedback high-flow rate inserting type multichannel reversing valve hydraulic control system engineering mechanical device. The system is composed of a pump control valve set, pilot control valve sets and floating control function valve sets; a fixed displacement pump or a variable displacement pump are adopted for the system; an oil cylinder is controlled by each pilot control valve set; an oil cylinder is controlled by each floating control function valve set; each pilot control valve set is internally provided with four inserting valves, four pilot valves, two overloading protective valves and two check valves; and each floating control function valve set is internally provided with four inserting valves, four pilot valves, two overloading protective valves and an electromagnetic reversing valve. The positive feedback high-flow rate inserting type multichannel reversing valve hydraulic control system has the advantages that the structure is simple, the inserting valves are adopted, the exterior volume is small, the system is accurate, simple and convenient in operation and control, the working is stable and reliable, the system has the advantages of no leakage, high efficiency, conservative energy consumption, low equipment manufacturing cost and high integral degree, and the system is widely used for a high-flow rate hydraulic control system device for a soil shifter.
Description
Technical field
The present invention relates to a kind of positive feedback high-flow rate inserting type multichannel reversing valve hydraulic control system, particularly the positive feedback high-flow rate inserting type multichannel reversing valve hydraulic control system engineering mechanical device.
Background technique
At present, what used multiple directional control valve all adopted in the engineering machinery is that valve core of the spool valve adds the structure of casting valve body, owing to be subject to the impact of system pressure and body strength restriction, 12 millimeters latus rectums of its latus rectum maximum application to two, can not break through the flow of 25 millimeters latus rectums always, adopt above structure namely to enable to reach, cost is also quite expensive, the user can not accept, so till now, domesticly can not produce high-power always, the engineering machinery of large flow, for example: 500 horsepowers of bulldozers are as using above structure, its pressure loss reaches 30 kilograms, energy consumption is high, and external form is bulky, and it is larger to take up room, while control section complex structure, rate of fault is high, leaks seriously, moves unstable, impact greatly, maintenance is inconvenient.
Summary of the invention
Purpose of the present invention provides a kind of positive feedback high-flow rate inserting type multichannel reversing valve hydraulic control system, and it is to adopt cartridge valve to combine with integration hydraulic control system, actuator in the Control Engineering machinery, it is high to solve the pressure loss, and energy consumption is high, complex structure, rate of fault is high, leaks seriously, moves unstable, impact large, it is larger to take up room, and the problem that maintenance is inconvenient is implemented in the particularly purpose of the large flow of bulldozer field application of engineering machinery.
Positive feedback high-flow rate inserting type multichannel reversing valve hydraulic control system of the present invention takes following technological scheme to realize: it is to be made of pump control valve group, pilot-actuated valve group and floating control duty valve group, system adopts metering pump or variable displacement pump, oil cylinder of each group pilot-actuated valve group control, oil cylinder of each group floating control duty valve group control is provided with four cartridge valves, four pilot valves, two overload protection valves and two one-way valves in the pilot-actuated valve group; Be provided with four cartridge valves, four pilot valves, two overload protection valves, four one-way valves and a solenoid directional control valve in the floating control duty valve group.Adopt the pump control valve group of metering pump by metering pump, filler opening, oil outlet, the number one pilot control opening, damper, the plug-in mounting pressure valve, precursor overflow valve and guide's hydraulic operated valve consist of, delivery side of pump is communicated with filler opening, filler opening is communicated with plug-in mounting pressure valve one end, plug-in mounting pressure valve one end is communicated with oil outlet, plug-in mounting pressure valve one end is communicated with an end of precursor overflow valve and guide's hydraulic operated valve, the other end of precursor overflow valve and guide's hydraulic operated valve is communicated with oil outlet, one end of guide's hydraulic operated valve is communicated with the number one pilot control opening, damper one end is communicated with the number one pilot control opening, and the damper the other end is communicated with oil outlet.Adopt the pump control valve group of variable displacement pump to be consisted of by variable displacement pump, filler opening, oil outlet, number one pilot control opening, damper, plug-in mounting pressure valve, precursor overflow valve and guide's hydraulic operated valve, delivery side of pump is communicated with filler opening, filler opening is communicated with plug-in mounting pressure valve one end, plug-in mounting pressure valve one end is communicated with oil outlet, plug-in mounting pressure valve one end is communicated with precursor overflow valve and guide's hydraulic operated valve, the other end of precursor overflow valve and guide's hydraulic operated valve is communicated with oil outlet, one end of guide's hydraulic operated valve is communicated with the number one pilot control opening, and the number one pilot control opening is communicated with variable displacement pump.The pilot-actuated valve group is by the number one cartridge valve, No. second cartridge valve, No. seven cartridge valve, No. eight cartridge valve, the number one pilot valve, No. second pilot valve, No. seven pilot valve, No. eight pilot valve, the number one cylinder ports, No. second cylinder ports, No. second pilot control opening, No. three pilot control opening, No. five one-way valve and No. six one-way valve form, filler opening is communicated with number one cartridge valve one end, filler opening is communicated with No. eight cartridge valve one end, No. eight cartridge valve one end is communicated with No. seven cartridge valve one end, No. eight cartridge valve one end is communicated with No. second cylinder ports, number one cartridge valve one end is communicated with No. second cartridge valve one end, No. second cartridge valve one end is communicated with oil outlet, No. seven cartridge valve one end is communicated with oil outlet, number one cartridge valve one end is communicated with the number one cylinder ports, No. eight cartridge valve one end is communicated with No. eight pilot valve, No. eight cartridge valve one end is communicated with No. second cylinder ports, number one pilot valve one end is communicated with the number one cartridge valve, number one pilot valve one end is communicated with No. second pilot control opening, number one pilot valve one end is communicated with the number one cylinder ports, number one pilot valve one end is communicated with oil outlet, No. eight cartridge valve of No. eight pilot valve one end is communicated with, No. eight pilot valve one end is communicated with No. three pilot control opening, No. eight pilot valve one end is communicated with No. second cylinder ports, No. eight pilot valve one end is communicated with oil outlet, No. second pilot valve one end is communicated with No. second cartridge valve, No. second pilot valve one end is communicated with the first overload valve, No. second pilot valve one end is communicated with No. three pilot control opening, No. second pilot valve one end is communicated with oil outlet, number one overload valve one end is communicated with oil outlet, No. seven pilot valve one end is communicated with No. seven cartridge valve, No. seven pilot valve one end is communicated with the 4th overload valve, No. seven pilot valve one end is communicated with No. second pilot control opening, No. seven pilot valve one end is communicated with oil outlet, No. four overload valve one end is communicated with oil outlet, No. six one-way valve one end is communicated with the number one pilot control opening, No. six one-way valve one end is communicated with No. second pilot control opening, No. five one-way valve one end is communicated with the number one pilot control opening, and No. five one-way valve one end is communicated with No. three pilot control opening.
Floating control duty valve group is by No. three cartridge valve, No. four cartridge valve, No. five cartridge valve, No. six cartridge valve, No. three pilot valve, No. four pilot valve, No. five pilot valve, No. six pilot valve, No. three cylinder ports, No. four cylinder ports, the number one one-way valve, No. second one-way valve, No. three one-way valve and No. four one-way valve form, filler opening is communicated with No. three cartridge valve one end, filler opening is communicated with No. six cartridge valve one end, No. six cartridge valve one end is communicated with No. five cartridge valve one end, No. six cartridge valve one end is communicated with No. four cylinder ports, No. three cartridge valve one end is communicated with No. four cartridge valve one end, No. four cartridge valve one end is communicated with oil outlet, No. five cartridge valve one end is communicated with oil outlet, No. three cartridge valve one end is communicated with No. three cylinder ports, No. six cartridge valve one end is communicated with No. six pilot valve, No. six cartridge valve one end is communicated with No. four cylinder ports, No. three pilot valve one end is communicated with No. three cartridge valve, No. three pilot valve one end is communicated with No. second pilot control opening, No. three pilot valve one end is communicated with No. three cylinder ports, No. three pilot valve one end is communicated with oil outlet, No. six pilot valve one end is communicated with No. six cartridge valve, No. six pilot valve one end is communicated with No. three pilot control opening, No. six pilot valve one end is communicated with No. four cylinder ports, No. six pilot valve one end is communicated with oil outlet, No. four pilot valve one end is communicated with No. four cartridge valve, No. four pilot valve one end is communicated with No. second overload valve, No. four pilot valve one end is communicated with No. three pilot control opening, No. four pilot valve one end is communicated with oil outlet, No. second overload valve one end is communicated with oil outlet, No. five pilot valve one end is communicated with No. five cartridge valve, No. five pilot valve one end is communicated with No. three overload valve, No. five pilot valve one end is communicated with No. second pilot control opening, No. five pilot valve one end is communicated with oil outlet, No. three overload valve one end is communicated with oil outlet, No. four one-way valve one end is communicated with the number one pilot control opening, No. four one-way valve one end is communicated with No. second pilot control opening, No. three one-way valve one end is communicated with No. three pilot control opening, No. three one-way valve one end is communicated with No. three pilot control opening, solenoid directional control valve one end is communicated with the number one one-way valve, solenoid directional control valve one end is communicated with No. second one-way valve, and solenoid directional control valve one end is communicated with oil outlet.
The effect of positive feedback high-flow rate inserting type multichannel reversing valve hydraulic control system of the present invention is simple in structure, adopt cartridge valve, the external form volume is little, operation control is accurately easy, and working stability is reliable, without revealing, have high efficiency and energy efficient, reduce equipment manufacturing cost, level of integration is high, is widely used on the bulldozer high-volume hydraulic control system equipment.
Description of drawings
Positive feedback high-flow rate inserting type multichannel reversing valve hydraulic control system of the present invention will be described in further detail with reference to Figs..
Fig. 1 is the hydraulic structure schematic representation of positive feedback high-flow rate inserting type multichannel reversing valve hydraulic control system of the present invention.
Fig. 2 is the hydraulic structure schematic representation of metering pump control valve group of the present invention.
Fig. 3 is the hydraulic structure schematic representation of variable displacement pump control valve group of the present invention.
1-oil-in, 2-oil-out, 3-number one pilot control opening, 4-damper, 5-plug-in mounting pressure valve, 6-precursor overflow valve, 7-guide hydraulic operated valve, 8-pump control valve group, 9-pilot-actuated valve group, 10-number one pilot valve, 11-No. the second pilot control opening, 12-number one inserted valve, 13-number one cylinder ports, 14-No. the second cylinder ports, 15-No. the second inserted valve, 16-number one overload valve, 17-the No. three pilot control opening, 18-No. the second pilot valve, 19-the No. three pilot valve, 20-the No. three cylinder ports, 21-the No. three inserted valve, 22-the No. four cylinder ports, 23-the No. four inserted valve, 24-No. the second overload valve, 25-the No. four pilot valve, 26-floating control duty valve group, 27-the No. five pilot valve, 28-number one check valve, 29-No. the second check valve, 30-solenoid directional control valve, 31-the No. three overload valve, 32-the No. three check valve, 33-the No. five inserted valve, 34-the No. six inserted valve, 35-the No. six pilot valve, 36-the No. four check valve, 37-the No. seven pilot valve, 38-the No. five check valve, 39-the No. four overload valve, 40-the No. seven inserted valve, 41-the No. eight inserted valve, 42-the No. eight pilot valve, 43-the No. six check valve, 44-constant displacement pump, 45-variable pump.
Embodiment
With reference to Fig. 1,2,3, positive feedback high-flow rate inserting type multichannel reversing valve hydraulic control system of the present invention, it is to be made of with floating control duty valve group 26 pump control valve group 8, pilot-actuated valve group 9, system adopts metering pump 44 or variable displacement pump 45, oil cylinder of each group pilot-actuated valve group 9 control, oil cylinder of each group floating control duty valve group 26 control is provided with four cartridge valves, four pilot valves, two overload protection valves and two one-way valves in the pilot-actuated valve group 9; Be provided with four cartridge valves, four pilot valves, two overload protection valves, four one-way valves and a solenoid directional control valve in the floating control duty valve group.Adopt the pump control valve group 8 of metering pump 44 by metering pump 44, filler opening 1, oil outlet 2, number one pilot control opening 3, damper 4, plug-in mounting pressure valve 5, precursor overflow valve 6 consists of with guide's hydraulic operated valve 7, delivery side of pump is communicated with filler opening 1, filler opening 1 is communicated with plug-in mounting pressure valve 5 one ends, plug-in mounting pressure valve 5 one ends are communicated with oil outlet 2, plug-in mounting pressure valve 5 one ends are communicated with an end of precursor overflow valve 6 and guide's hydraulic operated valve 7, the other end of precursor overflow valve 6 and guide's hydraulic operated valve 7 is communicated with oil outlet 2, one end of guide's hydraulic operated valve 7 is communicated with number one pilot control opening 3, damper 4 one ends are communicated with number one pilot control opening 3, and damper 4 the other ends are communicated with oil outlet 2.Adopt the pump control valve group 8 of variable displacement pump 45 by variable displacement pump 45, filler opening 1, oil outlet 2, number one pilot control opening 3, damper 4, plug-in mounting pressure valve 5, precursor overflow valve 6 consists of with guide's hydraulic operated valve 7, delivery side of pump is communicated with filler opening 1, filler opening 1 is communicated with plug-in mounting pressure valve 5 one ends, plug-in mounting pressure valve 5 one ends are communicated with oil outlet 2, plug-in mounting pressure valve 5 one ends are communicated with an end of precursor overflow valve 6 and guide's hydraulic operated valve 7, the other end of precursor overflow valve 6 and guide's hydraulic operated valve 7 is communicated with oil outlet 2, one end of guide's hydraulic operated valve 7 is communicated with number one pilot control opening 3, and number one pilot control opening 3 is communicated with variable displacement pump 45.Pilot-actuated valve group 9 is by number one cartridge valve 12, No. second cartridge valve 15, No. seven cartridge valve 40, No. eight cartridge valve 41, number one pilot valve 10, No. second pilot valve 18, No. seven pilot valve 37, No. eight pilot valve 42, number one cylinder ports 13, No. second cylinder ports 14, No. second pilot control opening 11, No. three pilot control opening 17, No. five one-way valve 38 and No. six one-way valve 43 consist of, filler opening 1 is communicated with number one cartridge valve 12 1 ends, filler opening 1 is communicated with No. eight cartridge valve 41 1 ends, No. eight cartridge valve 41 1 ends are communicated with No. seven cartridge valve 40 1 ends, No. eight cartridge valve 41 1 ends are communicated with No. second cylinder ports 14, number one cartridge valve 12 1 ends are communicated with No. second cartridge valve 15 1 ends, No. second cartridge valve 15 1 ends are communicated with oil outlet 2, No. seven cartridge valve 40 1 ends are communicated with oil outlet 2, number one cartridge valve 12 1 ends are communicated with number one cylinder ports 13, No. eight cartridge valve 41 1 ends are communicated with No. eight pilot valve 42, No. eight cartridge valve 41 1 ends are communicated with No. second cylinder ports 14, number one pilot valve 10 1 ends are communicated with number one cartridge valve 12, number one pilot valve 10 1 ends are communicated with No. second pilot control opening 11, number one pilot valve 10 1 ends are communicated with number one cylinder ports 13, number one pilot valve 10 1 ends are communicated with oil outlet 2, No. eight pilot valve 42 1 ends are communicated with No. eight cartridge valve 41, No. eight pilot valve 42 1 ends are communicated with No. three pilot control opening 17, No. eight pilot valve 42 1 ends are communicated with No. second cylinder ports 14, No. eight pilot valve 42 1 ends are communicated with oil outlet 2, No. second pilot valve 18 1 ends are communicated with No. second cartridge valve 15, No. second pilot valve 18 1 ends are communicated with the first overload valve 16, No. second pilot valve 18 1 ends are communicated with No. three pilot control opening 17, No. second pilot valve 18 1 ends are communicated with oil outlet 2, number one overload valve 16 1 ends are communicated with oil outlet 2, No. seven pilot valve 37 1 ends are communicated with No. seven cartridge valve 40, No. seven pilot valve 37 1 ends are communicated with the 4th overload valve 39, No. seven pilot valve 37 1 ends are communicated with No. second pilot control opening 11, No. seven pilot valve 37 1 ends are communicated with oil outlet 2, No. four overload valve 39 1 ends are communicated with oil outlet 2, No. six one-way valve 43 1 ends are communicated with number one pilot control opening 3, No. six one-way valve 43 1 ends are communicated with No. second pilot control opening 11, No. five one-way valve 38 1 ends are communicated with number one pilot control opening 3, and No. five one-way valve 38 1 ends are communicated with No. three pilot control opening 17.
Floating control duty valve group 26 is by No. three cartridge valve 21, No. four cartridge valve 23, No. five cartridge valve 33, No. six cartridge valve 34, No. three pilot valve 19, No. four pilot valve 25, No. five pilot valve 27, No. six pilot valve 35, No. three cylinder ports 20, No. four cylinder ports 22, number one one-way valve 28, No. second one-way valve 29, No. three one-way valve 32 and No. four one-way valve 36 consist of, filler opening 1 is communicated with No. three cartridge valve 21 1 ends, filler opening 1 is communicated with No. six cartridge valve 34 1 ends, No. six cartridge valve 34 1 ends are communicated with No. five cartridge valve 33 1 ends, No. six cartridge valve 34 1 ends are communicated with No. four cylinder ports 22, No. three cartridge valve 21 1 ends are communicated with No. four cartridge valve 23 1 ends, No. four cartridge valve 23 1 ends are communicated with oil outlet 2, No. five cartridge valve 33 1 ends are communicated with oil outlet 2, No. three cartridge valve 21 1 ends are communicated with No. three cylinder ports 20, No. six cartridge valve 34 1 ends are communicated with No. six pilot valve 35, No. six cartridge valve 35 1 ends are communicated with No. four cylinder ports 22, No. three pilot valve 19 1 ends are communicated with No. three cartridge valve 21, No. three pilot valve 19 1 ends are communicated with No. second pilot control opening 11, No. three pilot valve 19 1 ends are communicated with No. three cylinder ports 20, No. three pilot valve 19 1 ends are communicated with oil outlet 2, No. six pilot valve 35 1 ends are communicated with No. six cartridge valve 34, No. six pilot valve 35 1 ends are communicated with No. three pilot control opening 17, No. six pilot valve 35 1 ends are communicated with No. four cylinder ports 22, No. six pilot valve 35 1 ends are communicated with oil outlet 2, No. four pilot valve 25 1 ends are communicated with No. four cartridge valve 23, No. four pilot valve 25 1 ends are communicated with No. second overload valve 24, No. four pilot valve 25 1 ends are communicated with No. three pilot control opening 17, No. four pilot valve 25 1 ends are communicated with oil outlet 2, No. second overload valve 24 1 ends are communicated with oil outlet 2, No. five pilot valve 27 1 ends are communicated with No. five cartridge valve 33, No. five pilot valve 27 1 ends are communicated with No. three overload valve 31, No. five pilot valve 27 1 ends are communicated with No. second pilot control opening 11, No. five pilot valve 27 1 ends are communicated with oil outlet 2, No. three overload valve 31 1 ends are communicated with oil outlet 2, No. four one-way valve 36 1 ends are communicated with number one pilot control opening 3, No. four one-way valve 36 1 ends are communicated with No. second pilot control opening 11, No. three one-way valve 32 1 ends are communicated with No. three pilot control opening 17, No. three one-way valve 32 1 ends are communicated with No. three pilot control opening 17, solenoid directional control valve 30 1 ends are communicated with number one one-way valve 28, solenoid directional control valve 30 1 ends are communicated with No. second one-way valve 29, and solenoid directional control valve 30 1 ends are communicated with oil outlet 2.
The embodiment of positive feedback high-flow rate inserting type multichannel reversing valve hydraulic control system of the present invention, it is to be made of with floating control duty valve group 26 pump control valve group 8, pilot-actuated valve group 9, needs according to engineering machinery, system can adopt metering pump 44 or variable displacement pump 45, oil cylinder of each group pilot-actuated valve group 9 control, oil cylinder of each group floating control duty valve group 26 control can have several pilot-actuated valve groups 9 or several floating control duty valve group 26 to consist of according to the quantity of oil cylinder accordingly.Promote with one group of pilot-actuated valve group 9 such as the ridge buster oil cylinder in the bulldozer, the ridge buster oil cylinder tilts with one group of pilot-actuated valve group 9, the right shovel of dozer promotes with one group of floating control duty valve group 26 with one group of pilot-actuated valve group 9, dozer with one group of pilot-actuated valve group 9, the left shovel of dozer.Be provided with four cartridge valves, four pilot valves, two overload protection valves and two one-way valves in the pilot-actuated valve group 9; Be provided with four cartridge valves, four pilot valves, two overload protection valves, four one-way valves and a solenoid directional control valve in the floating control duty valve group 26, realize the function of the lifting of Cylinders of Construction Machinery, descending, repairing, Overload Protection.
When adopting metering pump 44, the working principle of pilot-actuated valve group 9: when No. second pilot control opening 11 and No. three pilot control opening 17 did not have pressure, guide's hydraulic operated valve 7 was in meta, 5 pressure releases of plug-in mounting pressure valve, and system does not have pressure.When No. second pilot control opening 11 begins pressure is arranged, when pressure overcomes guide's hydraulic operated valve 7, during the spring of number one pilot valve 10 and No. seven pilot valve 37, guide's hydraulic operated valve 7, the spool of number one pilot valve 10 and No. seven pilot valve 37 moves, guide's hydraulic operated valve 7 is tending towards closed condition, the main valve plug of plug-in mounting pressure valve 5 also is tending towards closed condition, system begins that pressure is arranged, the spool of number one pilot valve 10 and No. seven pilot valve 37 moves unlatching, the control chamber pressure oil of number one cartridge valve 12 begins to enter number one cylinder ports 13 by the spool of number one pilot valve 10, the spool of number one cartridge valve 12 begins to open, the control chamber pressure oil of No. seven cartridge valve 40 begins to enter oil outlet 2 by the spool of No. seven pilot valve 37 simultaneously, the spool of No. seven cartridge valve 40 begins to open, the oil that metering pump 44 goes out enters the plug chamber of oil cylinder, the oil in cylinder rod chamber enters oil outlet 2 by No. seven cartridge valve 40 simultaneously, when the pressure of No. second pilot control opening 11 increases gradually, the spool of plug-in mounting pressure valve is closed more, spool metering pump 44 oil out of number one cartridge valve 12 is more by the oil that number one cartridge valve 12 enters oil cylinder, so just can improve the motion speed of oil cylinder; When No. three pilot control opening 17 begins pressure is arranged, when pressure overcomes guide's hydraulic operated valve 7, during the spring of No. second pilot valve 18 and No. eight pilot valve 42, guide's hydraulic operated valve 7, the spool of No. second pilot valve 18 and No. eight pilot valve 42 moves unlatching, guide's hydraulic operated valve 7 is tending towards closed condition, the main valve plug of plug-in mounting pressure valve 5 also is tending towards closed condition, system begins that pressure is arranged, the spool of No. second pilot valve 18 and No. eight pilot valve 42 moves unlatching, the control chamber pressure oil of No. eight cartridge valve 41 begins to enter cylinder ports 14 No. second by the spool of No. eight pilot valve 42, the spool of No. eight cartridge valve 41 begins to open, the control chamber pressure oil of No. second cartridge valve 15 begins to enter oil outlet 2 by the spool of No. second pilot valve 18 simultaneously, the spool of No. second cartridge valve 15 begins to open, metering pump 44 oil out enters the bar chamber of oil cylinder, the oil in oil cylinder plug chamber enters oil outlet 2 by No. second cartridge valve 15 simultaneously, when the pressure of No. three pilot control opening 17 increases gradually, the spool of plug-in mounting pressure valve is closed more, the spool open amount of No. eight cartridge valve 41 is more, metering pump 44 oil out is more by the oil that number one cartridge valve 12 enters oil cylinder, so just can improve the motion speed of oil cylinder.
The working principle of floating control duty valve group 26 is identical with the working principle of pilot-actuated valve group 9, just many individual float functions, when solenoid directional control valve 30 energising, the control chamber pressure oil of No. four cartridge valve 23 and No. five cartridge valve 33 enters oil outlet 2 by No. second one-way valve 29, number one one-way valve 28 and solenoid directional control valve 30 respectively, at this moment, the spool of No. four cartridge valve 23 and No. five cartridge valve 33 is all opened under the effect of pressure oil.
When adopting variable displacement pump 45, the pressure oil of number one pilot control opening 3 is applied to variable displacement pump 45 simultaneously, and output flow that simultaneously can controlled variable pump 45 reaches the function of control oil cylinder speed.
Claims (3)
1. positive feedback high-flow rate inserting type multichannel reversing valve hydraulic control system, it is to be made of with floating control duty valve group (26) pump control valve group (8), pilot-actuated valve group (9), it is characterized in that system adopts metering pump (44) or variable displacement pump (45), oil cylinder of each group pilot-actuated valve group (9) control, oil cylinder of each group floating control duty valve group (26) control is provided with four cartridge valves, four pilot valves, two overload protection valves and two one-way valves in the pilot-actuated valve group (9); Pilot-actuated valve group (9) is communicated with number one cartridge valve (12) one ends by filler opening (1), filler opening (1) is communicated with No. eight cartridge valve (41) one ends, No. eight cartridge valve (41) one ends are communicated with No. seven cartridge valve (40) one ends, No. eight cartridge valve (41) one ends are communicated with No. second cylinder ports (14), number one cartridge valve (12) one ends are communicated with No. second cartridge valve (15) one ends, No. second cartridge valve (15) one ends are communicated with oil outlet (2), No. seven cartridge valve (40) one ends are communicated with oil outlet (2), number one cartridge valve (12) one ends are communicated with number one cylinder ports (13), No. eight cartridge valve (41) one ends are communicated with No. eight pilot valve (42), No. eight cartridge valve (41) one ends are communicated with No. second cylinder ports (14), number one pilot valve (10) one ends are communicated with number one cartridge valve (12), number one pilot valve (10) one ends are communicated with No. second pilot control opening (11), number one pilot valve (10) one ends are communicated with number one cylinder ports (13), number one pilot valve (10) one ends are communicated with oil outlet (2), No. eight pilot valve (42) one ends are communicated with No. eight cartridge valve (41), No. eight pilot valve (42) one ends are communicated with No. three pilot control opening (17), No. eight pilot valve (42) one ends are communicated with No. second cylinder ports (14), No. eight pilot valve (42) one ends are communicated with oil outlet (2), No. second pilot valve (18) one ends are communicated with No. second cartridge valve (15), No. second pilot valve (18) one ends are communicated with number one overload valve (16), No. second pilot valve (18) one ends are communicated with No. three pilot control opening (17), No. second pilot valve (18) one ends are communicated with oil outlet (2), number one overload valve (16) one ends are communicated with oil outlet (2), No. seven pilot valve (37) one ends are communicated with No. seven cartridge valve (40), No. seven pilot valve (37) one ends are communicated with No. four overload valve (39), No. seven pilot valve (37) one ends are communicated with No. second pilot control opening (11), No. seven pilot valve (37) one ends are communicated with oil outlet (2), No. four overload valve (39) one ends are communicated with oil outlet (2), No. six one-way valve (43) one ends are communicated with number one pilot control opening (3), No. six one-way valve (43) one ends are communicated with No. second pilot control opening (11), No. five one-way valve (38) one ends are communicated with number one pilot control opening (3), and No. five one-way valve (38) one ends are communicated with No. three pilot control opening (17); Be provided with four cartridge valves, four pilot valves, two overload protection valves, four one-way valves and a solenoid directional control valve in the floating control duty valve group; Floating control duty valve group (26) is communicated with No. three cartridge valve (21) one ends by filler opening (1), filler opening (1) is communicated with No. six cartridge valve (34) one ends, No. six cartridge valve (34) one ends are communicated with No. five cartridge valve (33) one ends, No. six cartridge valve (34) one ends are communicated with No. four cylinder ports (22), No. three cartridge valve (21) one ends are communicated with No. four cartridge valve (23) one ends, No. four cartridge valve (23) one ends are communicated with oil outlet (2), No. five cartridge valve (33) one ends are communicated with oil outlet (2), No. three cartridge valve (21) one ends are communicated with No. three cylinder ports (20), No. six cartridge valve (34) one ends are communicated with No. six pilot valve (35), No. six cartridge valve (35) one ends are communicated with No. four cylinder ports (22), No. three pilot valve (19) one ends are communicated with No. three cartridge valve (21), No. three pilot valve (19) one ends are communicated with No. second pilot control opening (11), No. three pilot valve (19) one ends are communicated with No. three cylinder ports (20), No. three pilot valve (19) one ends are communicated with oil outlet (2), No. six pilot valve (35) one No. six cartridge valves of end (34) are communicated with, No. six pilot valve (35) one ends are communicated with No. three pilot control opening (17), No. six pilot valve (35) one ends are communicated with No. four cylinder ports (22), No. six pilot valve (35) one ends are communicated with oil outlet (2), No. four pilot valve (25) one ends are communicated with No. four cartridge valve (23), No. four pilot valve (25) one ends are communicated with No. second overload valve (24), No. four pilot valve (25) one ends are communicated with No. three pilot control opening (17), No. four pilot valve (25) one ends are communicated with oil outlet (2), No. second overload valve (24) one ends are communicated with oil outlet (2), No. five pilot valve (27) one ends are communicated with No. five cartridge valve (33), No. five pilot valve (27) one ends are communicated with No. three overload valve (31), No. five pilot valve (27) one ends are communicated with No. second pilot control opening (11), No. five pilot valve (27) one ends are communicated with oil outlet (2), No. three overload valve (31) one ends are communicated with oil outlet (2), No. four one-way valve (36) one ends are communicated with number one pilot control opening (3), No. four one-way valve (36) one ends are communicated with No. second pilot control opening (11), No. three one-way valve (32) one ends are communicated with No. three pilot control opening (17), No. three one-way valve (32) one ends are communicated with No. three pilot control opening (17), solenoid directional control valve (30) one ends are communicated with number one one-way valve (28), solenoid directional control valve (30) one ends are communicated with No. second one-way valve (29), and solenoid directional control valve (30) one ends are communicated with oil outlet (2).
2. according to positive feedback high-flow rate inserting type multichannel reversing valve hydraulic control system claimed in claim 1, the pump control valve group (8) that it is characterized in that adopting metering pump (44) is communicated with filler opening (1) by the outlet of metering pump (44), filler opening (1) is communicated with plug-in mounting pressure valve (5) one ends, plug-in mounting pressure valve (5) one ends are communicated with oil outlet (2), plug-in mounting pressure valve (5) one ends are communicated with an end of precursor overflow valve (6) and guide's hydraulic operated valve (7), the other end of precursor overflow valve (6) and guide's hydraulic operated valve (7) is communicated with oil outlet (2), one end of guide's hydraulic operated valve (7) is communicated with number one pilot control opening (3), damper (4) one ends are communicated with number one pilot control opening (3), and damper (4) the other end is communicated with oil outlet (2).
3. according to positive feedback high-flow rate inserting type multichannel reversing valve hydraulic control system claimed in claim 1, the pump control valve group (8) that it is characterized in that adopting variable displacement pump (45) is communicated with filler opening (1) by the outlet of variable displacement pump (45), filler opening (1) is communicated with plug-in mounting pressure valve (5) one ends, plug-in mounting pressure valve (5) one ends are communicated with oil outlet (2), plug-in mounting pressure valve (5) one ends are communicated with an end of precursor overflow valve (6) and guide's hydraulic operated valve (7), the other end of precursor overflow valve (6) and guide's hydraulic operated valve (7) is communicated with oil outlet (2), one end of guide's hydraulic operated valve (7) is communicated with number one pilot control opening (3), number one pilot control opening (3) is communicated with variable displacement pump (45), damper (4) one ends are communicated with number one pilot control opening (3), and damper (4) the other end is communicated with oil outlet (2).
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201110099479 CN102128183B (en) | 2011-04-20 | 2011-04-20 | Positive feedback high-flow rate inserting type multichannel reversing valve hydraulic control system |
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| CN 201110099479 CN102128183B (en) | 2011-04-20 | 2011-04-20 | Positive feedback high-flow rate inserting type multichannel reversing valve hydraulic control system |
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| CN102128183B true CN102128183B (en) | 2013-03-13 |
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| CN102359133B (en) * | 2011-09-27 | 2013-09-18 | 山推工程机械股份有限公司 | Hydraulic system of bulldozer |
| CN103089721B (en) * | 2013-03-01 | 2015-03-11 | 山东泰丰液压股份有限公司 | High-flow electric-hydraulic proportional cartridge valve hydraulic control system for differential speed regulation |
| CN112879371A (en) * | 2021-03-08 | 2021-06-01 | 中国船舶重工集团公司第七0四研究所 | Large-flow bidirectional safety protection and floating hydraulic circuit |
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| KR100512572B1 (en) * | 2000-09-29 | 2005-09-06 | 가부시키 가이샤 가와사키 프리시젼 머시너리 | Hydraulic Controller |
| ITMO20050256A1 (en) * | 2005-10-07 | 2007-04-08 | Salami Spa | SAFETY DEVICE FOR HYDRAULIC DISTRIBUTION UNITS |
| CN201111563Y (en) * | 2007-09-27 | 2008-09-10 | 天津市天锻压力机有限公司 | Hydraulic integration liftout valve block |
| CN201144909Y (en) * | 2007-12-29 | 2008-11-05 | 江苏国力锻压机床有限公司 | Hydraulic control system of hydraulic machine |
| CN101695718A (en) * | 2009-10-23 | 2010-04-21 | 常州乙顿液压气动机械制造有限公司 | Drawbench hydraulic system |
| CN201991862U (en) * | 2011-04-20 | 2011-09-28 | 山东泰丰液压股份有限公司 | Positive-feedback large-flow plug-in type multiple directional control valve group |
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Address after: 272025, triumph Road, Jining hi tech Development Zone, Shandong, 66 Patentee after: Shandong Taifeng intelligent control Limited by Share Ltd Address before: 272025, triumph Road, Jining hi tech Development Zone, Shandong, 66 Patentee before: Shandong Taifeng Hydraulic Co., Ltd. |