CN105041740A - Pilot hydraulic control system with priority function - Google Patents
Pilot hydraulic control system with priority function Download PDFInfo
- Publication number
- CN105041740A CN105041740A CN201510302245.4A CN201510302245A CN105041740A CN 105041740 A CN105041740 A CN 105041740A CN 201510302245 A CN201510302245 A CN 201510302245A CN 105041740 A CN105041740 A CN 105041740A
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- valve
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- hydraulic
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Classifications
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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
-
- 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
- F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
- F15B13/044—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by electrically-controlled means, e.g. solenoids, torque-motors
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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
- F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
- F15B13/044—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by electrically-controlled means, e.g. solenoids, torque-motors
- F15B2013/0448—Actuation by solenoid and permanent magnet
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Operation Control Of Excavators (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The invention provides a pilot hydraulic control system with the priority function. The system is provided with a proportional decompression valve. An oil inlet of the proportional decompression valve is connected with a port P of a second pilot valve in parallel and is then connected to an oil outlet of a pilot hydraulic pump; an oil outlet of the proportional decompression valve is communicated with a port P of a first pilot valve; and the electric control end of the proportional decompression valve is connected to a controller and the pressure of the oil outlet is adjusted under the control of the controller. The pilot hydraulic control system has the beneficial effects that a priority valve is omitted, combined with the operation habit of an operator, only a set of electric proportional valves need to be additionally arranged, the priority function is achieved by the adoption of the electric hydraulic control technology, the structure is simple, a hydraulic system is simplified, cost is greatly reduced, the coordination performance of composite actions is greatly improved in combination with the electric hydraulic control technology, and more functions can be achieved through program setting.
Description
Technical field
The present invention relates to pilot hydraulic control system, particularly a kind of pilot hydraulic control system with priority function.
Background technique
Current engineering machinery, particularly hydraulic shovel requires the composite move of many actions, in order to realize these composite moves, hydraulic system generally all needs a lot of priority function, such as swing arm is preferential relative to dipper, swing arm turns round preferential etc. relatively, in order to realize these priority function, hydraulic system needs to configure corresponding pressure-gradient control valve, substantially each priority function needs configuration pressure-gradient control valve and pilot line thereof, such as swing arm is preferential relative to dipper, swing arm turns round preferential etc. relatively, in order to realize these priority function, hydraulic system needs to configure corresponding pressure-gradient control valve, substantially each priority function needs configuration pressure-gradient control valve, result in hydraulic system debugging difficulty large, composition complexity and cost up.Such as: in the system shown in Fig. 1, the first pressure-gradient control valve 13, second pressure-gradient control valve 15 need be adopted just can to realize corresponding priority function.When operator adopts hydraulic system shown in Fig. 1 to carry out composite move operation, such as hydraulic shovel carries out digging operation or operation of leveling land, when to operate the 3rd hand guide reduction valve 223 and the 8th hand guide reduction valve 234 simultaneously: guide's oil hydraulic pump 21 is from hydraulic oil container 11 oil suction, pressure oil flows to the P mouth of first-hand pilot valve 22 and second-hand's pilot valve 23 respectively, the pressure oil flowing into first-hand pilot valve 22 enters the 3rd hand guide reduction valve 223, the pressure oil flowing into second-hand's pilot valve 23 enters the 8th hand guide reduction valve 234, the pressure oil of oil outlet 3 output of the 3rd hand guide reduction valve 223 enters the pilot control opening of the second selector valve 16 epicoele, the pressure oil that the oil outlet 4 of the 8th hand guide reduction valve 234 exports enters the pilot control hydraulic fluid port of the 3rd selector valve 17 epicoele and the control port of the second pressure-gradient control valve 15 simultaneously, control the second selector valve 16 and the 3rd selector valve 17 commutates, controller 31 detects the pressure signal from the 4th pressure transducer 35 and the 7th pressure transducer 38, to the swash plate swinging angle control control signal of hydraulic pressure main pump 12, swash plate is made to put respective angles, hydraulic pressure main pump 12 pressure oil output flows to the second selector valve 16 and the 3rd selector valve 17, but due to the effect of the second pressure-gradient control valve 15, limit the pressure oil of inflow second selector valve 16, to reach the preferential effect of relative second selector valve 16 of the 3rd selector valve 17.Again when to operate second-hand guide's reduction valve 222 and the 8th hand guide reduction valve 234 simultaneously: guide's oil hydraulic pump 21 is from hydraulic oil container 11 oil suction, pressure oil flows to the P mouth of first-hand pilot valve 22 and second-hand's pilot valve 23 respectively, the pressure oil flowing into first-hand pilot valve 22 enters second-hand guide's reduction valve 222, the pressure oil flowing into second-hand's pilot valve 23 enters the 8th hand guide reduction valve 234, the pressure oil of oil outlet 2 output of second-hand guide's reduction valve 222 enters the pilot control opening of the first selector valve 14 epicoele, the pressure oil that the oil outlet 4 of the 8th guide's reduction valve 234 exports enters the pilot control hydraulic fluid port of the 3rd selector valve 17 epicoele and the control port of the first pressure-gradient control valve 13 simultaneously, control the first selector valve 14 and the 3rd selector valve 17 commutates, controller 31 detects the pressure signal from the 3rd pressure transducer 34 and the 7th pressure transducer 38, to the swash plate swinging angle control control signal of hydraulic pressure main pump 12, swash plate is made to put respective angles, hydraulic pressure main pump 12 pressure oil output flows to the first selector valve 14 and the 3rd selector valve 17, but due to the effect of the first pressure-gradient control valve 13, limit the pressure oil of inflow first selector valve 14, to reach the preferential effect of relative first selector valve 14 of the 3rd selector valve 17.
Summary of the invention
Object of the present invention is just to provide a kind of cancels pressure-gradient control valve, and structure is simple, simplifies hydraulic system, the pilot hydraulic control system of priority function that what each side such as cost, performance was more excellent have.
Solution of the present invention is such: a kind of pilot hydraulic control system with priority function, comprise guide's oil hydraulic pump, first-hand pilot valve, second-hand's pilot valve, hydraulic pressure main pump, controller and selector valve group, it is characterized in that: be provided with proportional pressure-reducing valve, the oil outlet of described guide's oil hydraulic pump is received after the filler opening of described proportional pressure-reducing valve and the P mouth parallel connection of second-hand's pilot valve, the oil outlet of described proportional pressure-reducing valve is communicated with the P mouth of first-hand pilot valve, the automatically controlled of described proportional pressure-reducing valve terminates to controller, the pressure of the regulating and controlling oil outlet of controlled device, the selector valve action that the preferential first-hand pilot valve of the selector valve action that second-hand's pilot valve is controlled controls.
Technological scheme also comprises more specifically: described selector valve group is made up of the first selector valve, the second selector valve, the 3rd selector valve and the 4th selector valve, wherein the first selector valve epicoele control port is communicated with oil outlet and the 3rd pressure transducer of the second-hand guide's hydraulic relief valve in first-hand pilot valve, and its cavity of resorption control port is communicated with oil outlet and second pressure transducer of the 4th hand guide hydraulic relief valve in first-hand pilot valve; Second selector valve epicoele control port is communicated with oil outlet and the 4th pressure transducer of the 3rd hand guide hydraulic relief valve in first-hand pilot valve, and its cavity of resorption control port is communicated with oil outlet and first pressure transducer of the first-hand guide's hydraulic relief valve in first-hand pilot valve; 3rd selector valve epicoele control port is communicated with oil outlet and the 7th pressure transducer of the 8th hand guide hydraulic relief valve in second-hand's pilot valve, and its cavity of resorption control port is communicated with oil outlet and the 6th pressure transducer of the 6th hand guide hydraulic relief valve in second-hand's pilot valve; 4th selector valve epicoele control port is communicated with oil outlet and the 8th pressure transducer of the 5th hand guide hydraulic relief valve in first-hand pilot valve, and its cavity of resorption control port is communicated with oil outlet and the 5th pressure transducer of the 7th hand guide hydraulic relief valve in first-hand pilot valve.
Advantage of the present invention cancels pressure-gradient control valve, the operating habit of binding operation personnel, only need increase by one group of electric proportional valve, and adopting the priority function needed for electrohydraulic control technology realization, structure is simple, simplifies hydraulic system, cost significantly reduces, in conjunction with electrohydraulic control technology, by greatly improving the coordination performance of composite move, by programming, more function can be realized.
Accompanying drawing explanation
Fig. 1 is a kind of existing pilot hydraulic control system.
Fig. 2 is one embodiment of the invention hydraulic schematic diagram.
In figure, reference character is: 11 is hydraulic oil container, 12 is hydraulic pressure main pump, 13 is the first pressure-gradient control valve, 14 is the first selector valve, 15 is the second pressure-gradient control valve, 16 is the second selector valve, 17 is the 3rd selector valve, 18 is the 4th selector valve, 21 is guide's oil hydraulic pump, 22 is first-hand pilot valve, 23 is second-hand's pilot valve, 24 is proportional pressure-reducing valve, 221 is first-hand guide's hydraulic relief valve, 222 is second-hand guide's hydraulic relief valve, 223 is the 3rd hand guide hydraulic relief valve, 224 is the 4th hand guide hydraulic relief valve, 231 is the 5th hand guide hydraulic relief valve, 232 is the 6th hand guide hydraulic relief valve, 233 is the 7th hand guide hydraulic relief valve, 234 is the 8th hand guide hydraulic relief valve, 31 is controller, 32 is the first pressure transducer, 33 is the second pressure transducer, 34 is the 3rd pressure transducer, 35 is the 4th pressure transducer, 36 is the 5th pressure transducer, 37 is the 6th pressure transducer, 38 is the 7th pressure transducer, 39 is the 8th pressure transducer.
Embodiment
As shown in Figure 2, the present embodiment is the structure having precedence over left-handed operation with right-hand operated, that is: the action of second-hand's pilot valve 23 has precedence over the action of first-hand pilot valve 22, therefore, the present embodiment comprises guide's oil hydraulic pump 21, first-hand pilot valve 22, second-hand's pilot valve 23, hydraulic pressure main pump 12, controller 31 and selector valve group, it is characterized in that: be provided with proportional pressure-reducing valve 24, the oil outlet of described guide's oil hydraulic pump 21 is received after the filler opening of described proportional pressure-reducing valve 24 and the P mouth parallel connection of second-hand's pilot valve 23, the oil outlet of described proportional pressure-reducing valve 24 is communicated with the P mouth of first-hand pilot valve 22, the automatically controlled of described proportional pressure-reducing valve 24 terminates to controller 31, the pressure of the regulating and controlling oil outlet of controlled device 31, the selector valve action that the preferential first-hand pilot valve 22 of the selector valve action that second-hand's pilot valve 23 is controlled controls.
Described selector valve group is by the first selector valve 14, second selector valve 16, the 3rd selector valve 17 and the 4th selector valve 18, wherein the first selector valve 14 epicoele control port is communicated with the oil outlet of the second-hand guide's hydraulic relief valve 222 in first-hand pilot valve 22, and its cavity of resorption control port is communicated with oil outlet and second pressure transducer 33 of the 4th hand guide hydraulic relief valve 224 in first-hand pilot valve 22; Second selector valve 16 epicoele control port is communicated with the oil outlet of the 3rd hand guide hydraulic relief valve 223 in first-hand pilot valve 22, and its cavity of resorption control port is communicated with oil outlet and first pressure transducer 32 of the first-hand guide's hydraulic relief valve 221 in first-hand pilot valve 22; 3rd selector valve 17 epicoele control port is communicated with the oil outlet of the 8th hand guide hydraulic relief valve 234 in second-hand's pilot valve 23, and its cavity of resorption control port is communicated with oil outlet and the 6th pressure transducer 37 of the 6th hand guide hydraulic relief valve 232 in second-hand's pilot valve 23; 4th selector valve 18 epicoele control port is communicated with the oil outlet of the 5th hand guide hydraulic relief valve 231 in first-hand pilot valve 22, and its cavity of resorption control port is communicated with oil outlet and the 5th pressure transducer 36 of the 7th hand guide hydraulic relief valve 233 in first-hand pilot valve 22.
The inlet port of described guide's oil hydraulic pump 21 is communicated with hydraulic oil container 11; Described guide's oil hydraulic pump 21 oil outlet is communicated with the P mouth of second-hand's pilot valve 23 with the filler opening of proportional pressure-reducing valve 24 respectively; Described hydraulic oil container 11 is communicated with the return opening of proportional pressure-reducing valve 24 with the T mouth of first-hand pilot valve 22, second-hand's pilot valve 23 respectively; The oil outlet of described proportional pressure-reducing valve 24 is communicated with the P mouth of first-hand pilot valve 22; The P mouth of described first-hand pilot valve 22 is communicated with the filler opening of the 4th hand guide hydraulic relief valve 224 with first-hand guide's hydraulic relief valve 221, second-hand guide's hydraulic relief valve 222, the 3rd hand guide hydraulic relief valve 223 respectively; The P mouth of described second-hand's pilot valve 23 is communicated with the filler opening of the 8th hand guide hydraulic relief valve 234 with the 5th hand guide hydraulic relief valve the 231, the 6th hand guide hydraulic relief valve the 232, the 7th hand guide hydraulic relief valve 233 respectively; The oil outlet 1 of described first-hand guide's reduction valve 221 is communicated with the cavity of resorption pilot control opening of the second selector valve 16; The oil outlet 2 of described second-hand guide's reduction valve 222 controls mouth with the epicoele of the first selector valve 14 and is communicated with; The oil outlet 3 of the 3rd described hand guide reduction valve 223 is communicated with the epicoele pilot control opening of the second selector valve 16; The oil outlet 4 of the 4th described guide's reduction valve 224 is communicated with the cavity of resorption pilot control opening of the first selector valve 14; The oil outlet 1 of the 5th described hand guide reduction valve 231 is communicated with the epicoele pilot control opening of the 4th selector valve 18; The oil outlet 2 of the 6th described hand guide reduction valve 232 controls mouth with the cavity of resorption of the 3rd selector valve 17 and is communicated with; The oil outlet 3 of the 7th described hand guide reduction valve 233 is communicated with the cavity of resorption pilot control opening of the 4th selector valve 18; The oil outlet 4 of the 8th described guide's reduction valve 234 is communicated with the epicoele pilot control opening of the 3rd selector valve 14; Described first-hand guide's hydraulic relief valve 221, second-hand guide's hydraulic relief valve 222, the 3rd hand guide hydraulic relief valve the 223, the 4th hand guide hydraulic relief valve the 224, the 5th hand guide hydraulic relief valve the 231, the 6th hand guide hydraulic relief valve the 232, the 7th hand guide hydraulic relief valve 233 are communicated with hydraulic oil container 11 respectively with the return opening of the 8th hand guide hydraulic relief valve 234.
In the technological scheme of above-mentioned this pilot control system, also comprise controller 31, first pressure transducer 32, second pressure transducer 33, the 3rd pressure transducer 34, the 4th pressure transducer 35, the 5th pressure transducer 36, the 6th pressure transducer 37, the 7th pressure transducer 38, the 8th pressure transducer 39.The output port of described controller 31 is communicated with the electromagnet of proportional pressure-reducing valve 24 with the swash plate swinging angle control mouth of Main Hydraulic Pump 12 respectively; Described controller 31 input port is communicated with the output port of the 8th pressure transducer 39 with the first pressure transducer 32, second pressure transducer 33, the 3rd pressure transducer 34, the 4th pressure transducer 35, the 5th pressure transducer 36, the 6th pressure transducer 37, the 7th pressure transducer 38 respectively; The input port of the first described pressure transducer 32 is communicated with the cavity of resorption pilot control opening of the second selector valve 16; The input port of the second described pressure transducer 33 is communicated with the cavity of resorption pilot control opening of the first selector valve 14; The input port of the 3rd described pressure transducer 34 is communicated with the epicoele pilot control opening of the first selector valve 14; The input port of the 4th described pressure transducer 35 is communicated with the epicoele pilot control opening of the second selector valve 16; The input port of the 5th described pressure transducer 36 is communicated with the cavity of resorption pilot control opening of the 4th selector valve 18; The input port of the 6th described pressure transducer 37 is communicated with the cavity of resorption pilot control opening of the 3rd selector valve 17; The input port of the 7th described pressure transducer 38 is communicated with the epicoele pilot control opening of the 3rd selector valve 17; The input port of the 8th described pressure transducer 39 is communicated with the epicoele pilot control opening of the 4th selector valve 18.
In the technological scheme of above-mentioned this pilot control system, also comprise hydraulic oil container 11, hydraulic pressure main pump 12, first selector valve 14, second selector valve 16, the 3rd selector valve 17, the 4th selector valve 18.The inlet port of described hydraulic pressure main pump 12 is communicated with hydraulic oil container 11, and the oil outlet of described hydraulic pressure main pump 12 is communicated with the filler opening of the first selector valve 14, second selector valve 16, the 3rd selector valve 17, the 4th selector valve 18 respectively.
When operator adopts system shown in Figure 2 to complete the same act of operation of system shown in Figure 1, such as hydraulic shovel carries out digging operation or operation of leveling land, when operating the 3rd hand guide reduction valve 223 and the 8th hand guide reduction valve 234: guide's oil hydraulic pump 21 is from hydraulic oil container 11 oil suction simultaneously, pressure oil flows to the P mouth of proportional pressure-reducing valve 24 and second-hand's pilot valve 23 respectively, the pressure oil flowing into proportional pressure-reducing valve 24 flows into the P mouth of first-hand pilot valve 22, and then enter the 3rd hand guide reduction valve 223, the pressure oil flowing into second-hand's pilot valve 23 enters the 8th hand guide reduction valve 234, the pressure oil of oil outlet 3 output of the 3rd hand guide reduction valve 223 enters the pilot control opening of the second selector valve 16 epicoele, the pressure oil of oil outlet 4 output of the 8th hand guide reduction valve 234 enters the pilot control hydraulic fluid port of the 3rd selector valve 17 epicoele, control the second selector valve 16 and the 3rd selector valve 17 commutates, controller 31 detects the pressure signal from the 4th pressure transducer 35 and the 7th pressure transducer 38, to the swash plate swinging angle control control signal of hydraulic pressure main pump 12, swash plate is made to put respective angles, hydraulic pressure main pump 12 pressure oil output flows to the second selector valve 16 and the 3rd selector valve 17, send control signal to proportional pressure-reducing valve 24 electromagnet simultaneously, proportional pressure-reducing valve 24 is reduced pressure and arrives corresponding pressure, the pressure of the first-hand pilot valve 22 of inflow is reduced, and then reduce the oil liquid pressure of inflow second selector valve 16 epicoele pilot control opening, second selector valve 16 valve port opening is reduced, limit the fluid of inflow second selector valve 16, reach the effect that relative second selector valve 16 of the 3rd selector valve 17 is preferential equally.Again when to operate second-hand guide's reduction valve 222 and the 8th hand guide reduction valve 234 simultaneously: guide's oil hydraulic pump 21 is from hydraulic oil container 11 oil suction, pressure oil flows to the P mouth of proportional pressure-reducing valve 24 and second-hand's pilot valve 23 respectively, the pressure oil flowing into proportional pressure-reducing valve 24 flows into the P mouth of first-hand pilot valve 22, and then enter second-hand guide's reduction valve 222, the pressure oil flowing into second-hand's pilot valve 23 enters the 8th hand guide reduction valve 234, the pressure oil of oil outlet 2 output of second-hand guide's reduction valve 222 enters the pilot control opening of the first selector valve 14 epicoele, the pressure oil of oil outlet 4 output of the 8th hand guide reduction valve 234 enters the pilot control hydraulic fluid port of the 3rd selector valve 17 epicoele, control the first selector valve 14 and the 3rd selector valve 17 commutates, controller 31 detects the pressure signal from the 3rd pressure transducer 34 and the 7th pressure transducer 38, to the swash plate swinging angle control control signal of hydraulic pressure main pump 12, swash plate is made to put respective angles, hydraulic pressure main pump 12 pressure oil output flows to the first selector valve 14 and the 3rd selector valve 17, send control signal to proportional pressure-reducing valve 24 electromagnet simultaneously, proportional pressure-reducing valve 24 is reduced pressure and arrives corresponding pressure, the pressure of the first-hand pilot valve 22 of inflow is reduced, and then reduce the oil liquid pressure of inflow first selector valve 14 epicoele pilot control opening, second selector valve 16 valve port opening is reduced, limit the fluid of inflow first selector valve 14, reach the effect that relative first selector valve 14 of the 3rd selector valve 17 is preferential equally.
If need be adjusted to left-handed operation action to have precedence over right-hand operated action, only proportional pressure-reducing valve 24 need be received second-hand's pilot valve 23, first-hand pilot valve 22 directly connects guide's oil pump 21.
Claims (2)
1. one kind has the pilot hydraulic control system of priority function, comprise guide's oil hydraulic pump (21), first-hand pilot valve (22), second-hand's pilot valve (23), hydraulic pressure main pump (12), controller (31) and selector valve group, it is characterized in that: be provided with proportional pressure-reducing valve (24), the oil outlet of described guide's oil hydraulic pump (21) is received after the filler opening of described proportional pressure-reducing valve (24) and the P mouth parallel connection of second-hand's pilot valve (23), the oil outlet of described proportional pressure-reducing valve (24) is communicated with the P mouth of first-hand pilot valve (22), the automatically controlled of described proportional pressure-reducing valve (24) terminates to controller (31), the pressure of the regulating and controlling oil outlet of controlled device (31), the selector valve action that the preferential first-hand pilot valve (22) of the selector valve action that second-hand's pilot valve (23) is controlled controls.
2. the pilot hydraulic control system with priority function according to claim 1, it is characterized in that: described selector valve group is by the first selector valve (14), second selector valve (16), 3rd selector valve (17) and the 4th selector valve (18) composition, wherein the first selector valve (14) epicoele control port is communicated with oil outlet 2 and the 3rd pressure transducer (34) of the second-hand guide's hydraulic relief valve (222) in first-hand pilot valve (22), its cavity of resorption control port is communicated with oil outlet 4 and second pressure transducer (33) of the 4th hand guide hydraulic relief valve (224) in first-hand pilot valve (22), second selector valve (16) epicoele control port is communicated with oil outlet 3 and the 4th pressure transducer (35) of the 3rd hand guide hydraulic relief valve (223) in first-hand pilot valve (22), and its cavity of resorption control port is communicated with oil outlet 1 and first pressure transducer (32) of the first-hand guide's hydraulic relief valve (221) in first-hand pilot valve (22), 3rd selector valve (17) epicoele control port is communicated with oil outlet 4 and the 7th pressure transducer (38) of the 8th hand guide hydraulic relief valve (234) in second-hand's pilot valve (23), and its cavity of resorption control port is communicated with oil outlet 2 and the 6th pressure transducer (37) of the 6th hand guide hydraulic relief valve (232) in second-hand's pilot valve (23), 4th selector valve (18) epicoele control port is communicated with oil outlet 1 and the 8th pressure transducer (39) of the 5th hand guide hydraulic relief valve (231) in first-hand pilot valve (22), and its cavity of resorption control port is communicated with oil outlet and the 5th pressure transducer (36) of the 7th hand guide hydraulic relief valve (233) in first-hand pilot valve (22).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510302245.4A CN105041740B (en) | 2015-06-05 | 2015-06-05 | There is the pilot hydraulic control system of priority function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510302245.4A CN105041740B (en) | 2015-06-05 | 2015-06-05 | There is the pilot hydraulic control system of priority function |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105041740A true CN105041740A (en) | 2015-11-11 |
| CN105041740B CN105041740B (en) | 2017-03-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510302245.4A Active CN105041740B (en) | 2015-06-05 | 2015-06-05 | There is the pilot hydraulic control system of priority function |
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| CN (1) | CN105041740B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1125969A (en) * | 1994-04-28 | 1996-07-03 | 日立建机株式会社 | Aera limiting digging control device for a building machine |
| US5873245A (en) * | 1995-07-10 | 1999-02-23 | Hitachi Construction Machinery Co., Ltd. | Hydraulic drive system |
| US5930996A (en) * | 1997-10-02 | 1999-08-03 | Hitachi Construction Machinery Co., Ltd. | Auto-acceleration system for prime mover of hydraulic construction machine and control system for prime mover and hydraulic pump |
| US20100132798A1 (en) * | 2008-10-17 | 2010-06-03 | Eaton Corporation | Control valve actuation |
| CN202969446U (en) * | 2012-11-30 | 2013-06-05 | 中联重科股份有限公司渭南分公司 | Hydraulic control device and engineering machinery |
| CN103696997A (en) * | 2013-12-18 | 2014-04-02 | 柳州柳工挖掘机有限公司 | Hydraulic system with priority function |
| CN103807240A (en) * | 2012-11-14 | 2014-05-21 | 柳州柳工挖掘机有限公司 | Priority system and priority device on pilot hydraulic control oil circuit |
-
2015
- 2015-06-05 CN CN201510302245.4A patent/CN105041740B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1125969A (en) * | 1994-04-28 | 1996-07-03 | 日立建机株式会社 | Aera limiting digging control device for a building machine |
| US5873245A (en) * | 1995-07-10 | 1999-02-23 | Hitachi Construction Machinery Co., Ltd. | Hydraulic drive system |
| US5930996A (en) * | 1997-10-02 | 1999-08-03 | Hitachi Construction Machinery Co., Ltd. | Auto-acceleration system for prime mover of hydraulic construction machine and control system for prime mover and hydraulic pump |
| US20100132798A1 (en) * | 2008-10-17 | 2010-06-03 | Eaton Corporation | Control valve actuation |
| CN103807240A (en) * | 2012-11-14 | 2014-05-21 | 柳州柳工挖掘机有限公司 | Priority system and priority device on pilot hydraulic control oil circuit |
| CN202969446U (en) * | 2012-11-30 | 2013-06-05 | 中联重科股份有限公司渭南分公司 | Hydraulic control device and engineering machinery |
| CN103696997A (en) * | 2013-12-18 | 2014-04-02 | 柳州柳工挖掘机有限公司 | Hydraulic system with priority function |
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| Publication number | Publication date |
|---|---|
| CN105041740B (en) | 2017-03-01 |
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