CN101864965B - Pressure flow rate composite synchronization control energy-saving type shield propelling system - Google Patents
Pressure flow rate composite synchronization control energy-saving type shield propelling system Download PDFInfo
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- CN101864965B CN101864965B CN201010173618XA CN201010173618A CN101864965B CN 101864965 B CN101864965 B CN 101864965B CN 201010173618X A CN201010173618X A CN 201010173618XA CN 201010173618 A CN201010173618 A CN 201010173618A CN 101864965 B CN101864965 B CN 101864965B
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Abstract
The invention discloses a pressure flow rate composite synchronization control energy-saving type shield propelling system, which comprises an oil source system, wherein the oil source system is formed by connecting a motor with a constant rate pump through a shaft coupler, the oil source simultaneously supplies oil to a pipe sheet split part, the propelling system adopts zone control and is divided into four zones, a control part and a pressure synchronization and flow rate synchronization switching unit are arranged in each zone, the control part consists of a proportional flow rate valve and a proportional overflowing valve, and the pressure synchronization and flow rate synchronization switching unit consists of a flow division valve, a two-position three-way valve and grouped hydraulic cylinders. A main path of the invention adopts an open type control system controlled by a constant rate pump valve, can realize the propelling mode selection in the propelling process, and can realize the composite control on the pressure synchronization and the flow rate synchronization, at the same time, the pipe sheet split system and the propelling system share one set of oil source, and the installation power can be reduced. On one hand, because of the arrangement of an energy accumulator, the vibration and the impact can be absorbed, and on the other hand, the energy accumulator can also be used as an auxiliary energy source when the propelling cylinder retreats back or meets impact load. Thereby, the installation power of the system is further reduced.
Description
Technical field
The present invention relates to a kind of fluid pressure actuator, relate in particular to a kind of energy-saving type shield propelling system that adopts the control of pressure flow composite sync.
Background technique
Shield excavation machine is a kind of technology-intensive Important Project equipment that is exclusively used in the subterranean tunnel engineering excavation.It has that excavation speed is fast, quality is high, personnel labor intensity is little, safe, to advantage such as ground settlement and environmetal impact be little.Along with development in science and technology and social progress, shield driving will progressively replace conventional method.
Propulsion system has constituted complete shield machine shield construction system with cutterhead system, screw conveyor, pipe sheet assembling system.Propulsion system is one of critical system of shield structure, and it is mainly bearing the jacking task of whole shield structure, and turning, curve that require to accomplish the shield structure advanced, attitude control, correction and synchronization control etc.The adjustment of propulsion system is mainly controlled attitude through the adjustment oil hydraulic cylinder, and promotion is stretched action by the coordination top of the some oil hydraulic cylinders that circumferentially distribute along the shield structure usually and accomplished.The control of propulsion system not only is directly connected to the shield excavation attitude control that tunnel construction correctness and integrity are played a decisive role, and is that surface deformable also produces great influence to the most key controlling object in the underground engineering construction.The property complicated and changeable of tunneling construction soil property stratum and water and soil pressure thereof, and all unpredictable elements of existing of shield structure the place ahead have proposed higher control requirement to the thrust output and the speed of propulsion system.Therefore, the necessary real-time continuous of the pressure of propulsion hydraulic system and flow is adjustable, guarantees rational propelling force and fltting speed, keeps water and soil pressure balance in the tunneling process to cooperate other actuator.
Shield driving is a kind of typically high-power, heavy load operating mode, so the installed power of system is huge.In the so big system of energy consumption, the reasonable distribution of working efficiency and energy is an extremely important influence factor as far as systematic function.Pipe sheet assembling part and the independent fuel feeding of propeller in the tradition shield excavation machine must increase the installed power of system, and simultaneity factor is loaded down with trivial details; Oil hydraulic cylinder adopts directly parallel connection in the district, and when advancing load to change, direction of propulsion changes, and net synchronization capability is relatively poor, has increased the pressure of deviation-rectifying system to a certain extent.In order to increase work efficiency; Traditional propelling flow process is divided into propelling and rewind down part; Through using the interconnected form of high-low pump respectively to advancing and the rewind down fuel feeding; The cost of increase system and power loss, simultaneously, some potential energy of pipe sheet assembling part does not fully utilize; Therefore all can increase the installed power and the energy loss of system, therefore how guarantee that the shield driving system correctly efficiently realizes that the Energy Saving Control of hydraulic system and realization propelling synchronism are key technical problems in the shield driving under the situation of completion driving task.
Summary of the invention
Take into account the requirement of satisfying shield-tunneling construction in order to satisfy the problem that exists in the shield-tunneling construction process in the background technique; The object of the present invention is to provide a kind of energy-saving type shield propelling system of pressure flow composite sync control; The present invention both can realize the synchronization control between the driving cylinder and prevent inclined to one side; Can reduce the installed power of system again greatly, also increase the flexibility of propulsion system coordination control simultaneously.
The objective of the invention is to realize through following technological scheme: a kind of energy-saving type shield propelling system that adopts the control of pressure flow composite sync comprises: fuel tank, inlet port filter, electromagnetic relief valve, metering pump, coupling, electric mechanical, electrical liquid three position four-way directional control valve, two-position three way cartridge valve, electromagnet cut off valve, oil outlet filter, pressure relay, first one-way valve, second one-way valve, the 3rd one-way valve, the 4th one-way valve, gate valve, accumulator, the first two-position three way solenoid directional control valve, the second two-position three way solenoid directional control valve, the 3rd two-position three way solenoid directional control valve, the 4th two-position three way solenoid directional control valve, the 5th two-position three way solenoid directional control valve, proportional flow control valve, proportional pressure control valve, first diverter valve, second diverter valve, first one-way throttle valve, second one-way throttle valve, the 3rd one-way throttle valve, first safety valve, second safety valve, the 3rd safety valve, first oil hydraulic cylinder, second oil hydraulic cylinder, the 3rd oil hydraulic cylinder, first shuttle valve, second shuttle valve, displacement transducer, pressure transducer.
Motor is rigidly connected through coupling and metering pump; The inlet port of metering pump is communicated with the inlet port filter; The oil outlet of variable displacement pump is connected with oil outlet filter filler opening with an end of electromagnetic relief valve, an end of electromagnet cut off valve, an end of second one-way valve respectively; The oil drain out of oil outlet filter is connected with the P mouth of electric liquid three position four-way directional control valve; One end of the same respectively pressure relay of the other end of electromagnet cut off valve, first one-way valve is connected with gate valve, and the other end of the other end of first one-way valve and second one-way valve is connected with the pipe sheet assembling system respectively.The other end of gate valve is connected with accumulator, and the T mouth of electric liquid three position four-way directional control valve links to each other with fuel tank, and the A mouth links to each other with the filler opening A of two-position three way cartridge valve and the input end in each district respectively, and the B mouth of electric liquid three position four-way directional control valve and the output terminal in each district link to each other.Because propulsion system is divided into four districts, arrange equally in each district, the example that is arranged as in Yi Yi district describes: the A of the first two-position three way solenoid directional control valve, B mouth respectively in proportion an end of an end of Flow valve, the 3rd one-way valve be connected.One end of the other end of the other end of the other end of proportional flow control valve, the 3rd one-way valve, the 4th one-way valve, proportional pressure control valve is connected with the P mouth of the second two-position three way solenoid directional control valve.The A mouth of the second two-position three way solenoid directional control valve is connected with first one-way throttle valve, one end, second one-way throttle valve, one end and the 3rd one-way throttle valve one end respectively, and the B mouth of the second two-position three way solenoid directional control valve is connected with the first diverter valve filler opening.Two split-flow openings of first diverter valve are connected with the B of the second diverter valve filler opening, the 5th two-position three way solenoid directional control valve respectively; The A of the 3rd two-position three way solenoid directional control valve, B are connected with the other end, split-flow opening of second diverter valve of first one-way throttle valve respectively, and the P mouth of the 3rd two-position three way solenoid directional control valve is connected with second shuttle valve, one end with the rodless cavity of first safety valve, one end, first oil hydraulic cylinder respectively.The A of the 4th two-position three way solenoid directional control valve, B are connected with the other end, another split-flow opening of second diverter valve of second one-way throttle valve respectively, and the P mouth of the 4th two-position three way solenoid directional control valve is connected with first shuttle valve, one end with second safety valve, one end, the second oil hydraulic cylinder rodless cavity respectively.The A of the 5th two-position three way solenoid directional control valve, B are connected with the other end, another split-flow opening of first diverter valve of the 3rd one-way throttle valve respectively, and the P mouth of the 5th two-position three way solenoid directional control valve is connected with the first shuttle valve the other end with the 3rd safety valve one end, the 3rd oil hydraulic cylinder rodless cavity respectively.The other end of the other end of the other end of first safety valve, second safety valve, the 3rd safety valve is connected with fuel tank.The output terminal of first shuttle valve is connected with the other end of second shuttle valve, and the output terminal of second shuttle valve is connected with pressure transducer.The first oil hydraulic cylinder the other end, the second oil hydraulic cylinder the other end and the 3rd oil hydraulic cylinder the other end are as the output terminal in this district, and the P mouth of the first two-position three way solenoid directional control valve is as the input end in this district.
The present invention compares with background technique, and the beneficial effect that has is:
1) the shared oil sources of propulsion system and pipe sheet assembling system; Consider that pipe sheet assembling and propulsion system all have certain priority property on room and time; So this measure is feasible; Can reduce the installed power of system greatly, this point particularly has remarkable advantages in large-scale shield driving equipment.
2) adopt pressure and the synchronous two kinds of control modes of flow in each subregion of propulsion system; In shield structure linear advancement process, adopt the flow synchronization control can satisfy the direction of propulsion correctness;, propulsion system adopt pressure synchronous when deflecting; Pressure through regulating each subregion is regulated, and regulating effect is good.
3) propulsion system propelling and fallback procedures are interior only with a metering pump fuel feeding; Be different from traditional two metering pump fuel feeding; Increased ganged accumulators in this system; Thereby this accumulator fully absorbs in the assembly unit process gravitational potential energy in the pipe sheet assembling process oil-filled to accumulator, and accumulator and metering pump one propulsion system fuel feeding in the same way satisfies the requirement that rapidity is return by system when back off procedure.
4) propulsion system can realize average subregion, has overcome the inconvenience that control brings to system of traditional inhomogeneous subregion.
Description of drawings
Fig. 1 is the propulsion system hydraulic schematic diagram of flow pressure composite sync control;
Fig. 2 is a PF cylinder pressure zoning plan;
Among the figure: fuel tank 1; Inlet port filter 2; Electromagnetic relief valve 3; Metering pump 4; Coupling 5; Motor 6; Electricity liquid three position four-way directional control valve 7; Two-position three way cartridge valve 8; Electromagnet cut off valve 9; Oil outlet filter 10; Pressure relay 11; First one-way valve 12.1; Second one-way valve 12.2; The 3rd one-way valve 12.3; The 4th one-way valve 12.4; Gate valve 13; Accumulator 14; The first two-position three way solenoid directional control valve 15.1; The second two-position three way solenoid directional control valve 15.2; The 3rd two-position three way solenoid directional control valve 15.3; The 4th two-position three way solenoid directional control valve 15.4; The 5th two-position three way solenoid directional control valve 15.5; Proportional flow control valve 16; Proportional pressure control valve 17; First diverter valve 18.1; Second diverter valve 18.2; First one-way throttle valve 19.1; Second one-way throttle valve 19.2; The 3rd one-way throttle valve 19.3; First safety valve 20.1; Second safety valve 20.2; The 3rd safety valve 20.3; First oil hydraulic cylinder 21.1; Second oil hydraulic cylinder 21.2; The 3rd oil hydraulic cylinder 21.3; First shuttle valve 22.1; Second shuttle valve 22.2; Displacement transducer 23; Pressure transducer 24.
Embodiment
Describe the present invention in detail according to accompanying drawing below, it is more obvious that the object of the invention and effect will become.
As shown in Figure 1, the energy-saving type shield propelling system of pressure flow composite sync of the present invention control comprises: fuel tank 1, inlet port filter 2, electromagnetic relief valve 3, metering pump 4, coupling 5, motor 6, electric liquid three position four-way directional control valve 7, two-position three way cartridge valve 8, electromagnet cut off valve 9, oil outlet filter 10, pressure relay 11, first one-way valve 12.1, second one-way valve 12.2, the 3rd one-way valve 12.3, the 4th one-way valve 12.4, gate valve 13, accumulator 14, the first two-position three way solenoid directional control valve 15.1, the second two-position three way solenoid directional control valve 15.2, the 3rd two-position three way solenoid directional control valve 15.3, the 4th two-position three way solenoid directional control valve 15.4, the 5th two-position three way solenoid directional control valve 15.5, proportional flow control valve 16, proportional pressure control valve 17, first diverter valve 18.1, second diverter valve 18.2, first one-way throttle valve 19.1, second one-way throttle valve 19.2, the 3rd one-way throttle valve 19.3, first safety valve 20.1, second safety valve 20.2, the 3rd safety valve 20.3, first oil hydraulic cylinder 21.1, second oil hydraulic cylinder 21.2, the 3rd oil hydraulic cylinder 21.3, first shuttle valve 22.1, second shuttle valve 22.2, displacement transducer 23, pressure transducer 24.
Working procedure of the present invention is following:
At this, describe with the sequencing of shield structure work:
At first when process is pushed ahead in the propulsion system zero load; The pipe sheet assembling system stops action, and motor 6 drives metering pump 4 separately to the propulsion system fuel feeding, and this moment, the control valve electromagnet left end of electric liquid three position four-way directional control valve 7 got; This moment, the hydraulicchange-over valve of its upper end was higher than right-hand member pressure owing to left end pressure; So be operated in position, a left side, the control valve dead electricity of two-position three way cartridge valve (8) is operated in position, a left side under spring action; The while first two-position three way solenoid directional control valve, 15.1 dead electricity; The 3rd one-way valve 12.3 is proportional flow control valve 16 short circuits, this moment the 3rd two-position three way solenoid directional control valve 15.3, the 4th two-position three way solenoid directional control valve 15.4, the 5th two-position three way solenoid directional control valve 15.5 whole dead electricity, so the one-way valve of the one-way valve of the one-way valve of fluid through first one-way throttle valve 19.1, second one-way throttle valve 19.2, the 3rd one-way throttle valve 19.3 enters into the rodless cavity of first oil hydraulic cylinder 21.1, second oil hydraulic cylinder 21.2, the 3rd oil hydraulic cylinder 21.3; The fluid of rod chamber flow into the P mouth of two-position three way cartridge valve 8 through the B mouth of electric liquid three position four-way directional control valve 7; Flow into the A mouth of electric liquid three position four-way directional control valve 7 then, this moment, system adopted differential connection, and this moment, the flow system flow loss was very little; Metering pump 4 full flows carry out fuel feeding, and propulsion system is advanced fast.
When the propulsion system bringing onto load advanced, the pipe sheet assembling system stopped action, and motor 6 drives metering pump 4 separately to the propulsion system fuel feeding; This moment electric liquid three position four-way directional control valve 7 the electromagnet left end get electric, this moment its upper end hydraulicchange-over valve because the left end oil pressure is higher than the right-hand member oil pressure so be operated in left side position, the control valve of two-position three way cartridge valve 8 gets; While first two-position three way solenoid directional control valve 15.1 gets electric, and the second two-position three way solenoid directional control valve 15.2 gets electric, the 3rd two-position three way solenoid directional control valve 15.3; The 4th two-position three way solenoid directional control valve 15.4; The 5th two-position three way solenoid directional control valve 15.5 gets electric, and this moment, system adopted the control of ratio pressure flow composite sync, the flow synchronization control that in the district, adopts diverter valve to control between the oil hydraulic cylinder on working connection; This controlling method shunting effect is good; When running into impact load, because the feedback effect of diverter valve makes the flow sync response fast, synchronous effect is good.The installation of first shuttle valve 22.1, second shuttle valve 22.2 mainly is for the high pressure oil of drawing first oil hydraulic cylinder 21.1, second oil hydraulic cylinder 21.2, the 3rd oil hydraulic cylinder 21.3 and detects, comes the signal of real-time control ratio relief valve 17 through controller.The installation of displacement transducer 23 for the position of real-time detection driving cylinder and with ratio flow control formation closed loop control, make the positioning control of propulsion system more accurate.
When propulsion system will be turned; This moment second two-position three way solenoid directional control valve 15.2, the 3rd two-position three way solenoid directional control valve 15.3, the 4th two-position three way solenoid directional control valve 15.4, the 5th two-position three way solenoid directional control valve 15.5 whole dead electricity; The interval directly parallelly connected pressure synchronization control of oil hydraulic cylinder that adopts of propulsion system this moment is come deflection; Do not have restriction loss this moment, the same pressure correlation of result of deflection is simultaneously controlled effective.
When driving cylinder arrived extreme limit of travel, the pipe sheet assembling system started working, and motor 6 drives metering pump 4 separately to pipe sheet assembling system fuel feeding; The section of jurisdiction is in course of adjustment; With electromagnet cut off valve 9 energisings, metering pump 4 supplies part oil to accumulator 14, when the pipe sheet assembling process finishes; Because the gravity potential loss of energy that the deadweight of oil hydraulic cylinder produces can be converted into the energy of 14 li of accumulators; This moment, electromagnet cut off valve 9 cut off the power supply when detecting pressure above limit value when pressure transducer (24), accumulator 14 pressurizes this moment.
After the pipe sheet assembling process finishes; Driving cylinder is realized the function of rewind down, this moment electric liquid three position four-way directional control valve 7 the control valve right-hand member get electric, the left end dead electricity; The left end oil pressure of hydraulic control valve is less than the right-hand member oil pressure; So it is operated in right position, this moment accumulator 14 with metering pump 4 one in the same way system carry out fuel feeding, fluid enters into the rod chamber of first oil hydraulic cylinder 21.1, second oil hydraulic cylinder 21.2, the 3rd oil hydraulic cylinder 21.3.This moment first two-position three way solenoid directional control valve 15.1, the second two-position three way solenoid directional control valve 15.2, the 3rd two-position three way solenoid directional control valve 15.3, the 4th two-position three way solenoid directional control valve 15.4, the 5th two-position three way solenoid directional control valve 15.5 dead electricity all; It is one the tunnel through the second two-position three way solenoid directional control valve 15.2, the 3rd one-way valve 12.3, the oil return of electric liquid three position four-way directional control valve 7T mouth that the fluid of the rodless cavity of first oil hydraulic cylinder 21.1, second oil hydraulic cylinder 21.2, the 3rd oil hydraulic cylinder 21.3 converges after through first one-way throttle valve 19.1, second one-way throttle valve 19.2, the 3rd one-way throttle valve 19.3, has realized returning fast of driving cylinder.
The effect of first safety valve 20.1, second safety valve 20.2, the 3rd safety valve 20.3 mainly is in order to prevent that oil hydraulic cylinder rod chamber oil pressure is excessive in the drive-in step, and first one-way valve 12.1 mainly is that the hydraulic pressure that in the pipe sheet assembling process gravitational potential energy is converted in the accumulator can be prevented the backflow effect simultaneously.
Above-mentioned embodiment is used for the present invention that explains, rather than limits the invention, and in the protection domain of spirit of the present invention and claim, any modification and change to the present invention makes all fall into protection scope of the present invention.
Claims (2)
1. the energy-saving type shield propelling system of pressure flow composite sync control; It is characterized in that, comprise fuel tank (1), inlet port filter (2), electromagnetic relief valve (3), metering pump (4), coupling (5), motor (6), electric liquid three position four-way directional control valve (7), two-position three way cartridge valve (8), electromagnet cut off valve (9), oil outlet filter (10), pressure relay (11), gate valve (13), accumulator (14) and four districts; Wherein, Motor (6) is rigidly connected through coupling (5) and metering pump (4); The inlet port of metering pump (4) is communicated with inlet port filter (2); The oil outlet of variable displacement pump (6) is connected with oil outlet filter (10) filler opening with an end of electromagnetic relief valve (3), an end of electromagnet cut off valve (9), an end of second one-way valve (12.2) respectively; The oil drain out of oil outlet filter (10) is connected with the P mouth of electric liquid three position four-way directional control valve (7); One end of the same respectively pressure relay of the other end of electromagnet cut off valve (9) (11), first one-way valve (12.1) is connected with gate valve (13), and the other end of the other end of first one-way valve (12.1) and second one-way valve (12.2) is connected with the pipe sheet assembling system respectively; The other end of gate valve (13) is connected with accumulator (14); The T mouth of electricity liquid three position four-way directional control valve (7) links to each other with fuel tank; The A mouth links to each other with the filler opening A of two-position three way cartridge valve (8) and the input end in each district respectively, and the B mouth of electric liquid three position four-way directional control valve (7) and the output terminal in each district link to each other.
2. the energy-saving type shield propelling system of controlling according to the said pressure flow composite sync of claim 1; It is characterized in that each district comprises: first one-way valve (12.1), second one-way valve (12.2), the 3rd one-way valve (12.3), the 4th one-way valve (12.4), the first two-position three way solenoid directional control valve (15.1), the second two-position three way solenoid directional control valve (15.2), the 3rd two-position three way solenoid directional control valve (15.3), the 4th two-position three way solenoid directional control valve (15.4), the 5th two-position three way solenoid directional control valve (15.5), proportional flow control valve (16), proportional pressure control valve (17), first diverter valve (18.1), second diverter valve (18.2), first one-way throttle valve (19.1), second one-way throttle valve (19.2), the 3rd one-way throttle valve (19.3), first safety valve (20.1), second safety valve (20.2), the 3rd safety valve (20.3), first oil hydraulic cylinder (21.1), second oil hydraulic cylinder (21.2), the 3rd oil hydraulic cylinder (21.3), first shuttle valve (22.1), second shuttle valve (22.2), displacement transducer (23), pressure transducer (24); Wherein, an end of Flow valve (16), an end of the 3rd one-way valve (12.3) are connected in proportion respectively for the A mouth of the first two-position three way solenoid directional control valve (15.1), B mouth; One end of the other end of the other end of the other end of proportional flow control valve (16), the 3rd one-way valve (12.3), the 4th one-way valve (12.4), proportional pressure control valve (17) is connected with the P mouth of the second two-position three way solenoid directional control valve (15.2); The A mouth of the second two-position three way solenoid directional control valve (15.2) is connected with first one-way throttle valve (19.1) one ends, second one-way throttle valve (19.2) one ends and the 3rd one-way throttle valve (19.3) one ends respectively, and the B mouth of the second two-position three way solenoid directional control valve (15.2) is connected with first diverter valve (18.1) filler opening; Two split-flow openings of first diverter valve (18.1) are connected with the B mouth of second diverter valve (18.2) filler opening, the 5th two-position three way solenoid directional control valve (15.5) respectively; The A mouth of the 3rd two-position three way solenoid directional control valve (15.3), B mouth are connected with the other end, (18.2) split-flow openings of second diverter valve of first one-way throttle valve (19.1) respectively, and the P mouth of the 3rd two-position three way solenoid directional control valve (15.3) is connected with second shuttle valve (22.2) one ends with the rodless cavity of first safety valve (20.1) one ends, first oil hydraulic cylinder (21.1) respectively; The A mouth of the 4th two-position three way solenoid directional control valve (15.4), B mouth are connected with the other end, another split-flow opening of second diverter valve (18.2) of second one-way throttle valve (19.2) respectively, and the P mouth of the 4th two-position three way solenoid directional control valve (15.4) is connected with first shuttle valve (22.1) one ends with second safety valve (20.2) one ends, second oil hydraulic cylinder (21.2) rodless cavity respectively; The A mouth of the 5th two-position three way solenoid directional control valve (15.5), B mouth are connected with the other end, another split-flow opening of first diverter valve (18.1) of the 3rd one-way throttle valve (19.3) respectively, and the P mouth of the 5th two-position three way solenoid directional control valve (15.5) is connected with first shuttle valve (22.1) the other end with the 3rd safety valve (20.3) one ends, the 3rd oil hydraulic cylinder (21.3) rodless cavity respectively; The other end of the other end of the other end of first safety valve (20.1), second safety valve (20.2), the 3rd safety valve (20.3) is connected with fuel tank; The output terminal of first shuttle valve (22.1) is connected with the other end of second shuttle valve (22.2), and the output terminal of second shuttle valve (22.2) is connected with pressure transducer (24); First oil hydraulic cylinder (21.1) the other end, second oil hydraulic cylinder (21.2) the other end and the 3rd oil hydraulic cylinder (21.3) the other end are as the output terminal in this district, and the P mouth of the first two-position three way solenoid directional control valve (15.1) is as the input end in this district.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201010173618XA CN101864965B (en) | 2010-05-17 | 2010-05-17 | Pressure flow rate composite synchronization control energy-saving type shield propelling system |
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| CN201010173618XA CN101864965B (en) | 2010-05-17 | 2010-05-17 | Pressure flow rate composite synchronization control energy-saving type shield propelling system |
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| CN101864965A CN101864965A (en) | 2010-10-20 |
| CN101864965B true CN101864965B (en) | 2012-08-08 |
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| CN112623643B (en) * | 2021-01-26 | 2021-08-24 | 中国矿业大学 | Tensioning system of belt conveyor |
| CN112943733B (en) * | 2021-03-23 | 2022-08-30 | 中铁工程装备集团有限公司 | Heading machine propulsion system and control method thereof |
| CN116733807A (en) * | 2023-08-08 | 2023-09-12 | 山西斯普瑞机械制造股份有限公司 | Pressure and flow double proportional valve |
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| US4813749A (en) * | 1987-12-24 | 1989-03-21 | Dresser Industries, Inc. | Pilot operated stepping directional valve and method for single line operation |
| CN1287094C (en) * | 2004-03-12 | 2006-11-29 | 浙江大学 | Hydraulic propelling system for mining tunnel driving machine controlled by ratio flow pressure |
| JP2008045385A (en) * | 2006-08-21 | 2008-02-28 | Sanwa Kizai Co Ltd | Water-pressure feeder to water-pressure cylinder for compensation for buried-pipe propulsive-direction compensator |
| CN101408107B (en) * | 2008-11-11 | 2012-01-25 | 浙江大学 | Energy-saving type shield propulsion hydraulic system by using zone control |
| CN101575978B (en) * | 2009-06-01 | 2011-05-04 | 浙江大学 | Pressure-speed mixed control shield propulsion hydraulic system |
| CN201679504U (en) * | 2010-05-17 | 2010-12-22 | 浙江大学 | Energy-saving type shield propulsion system compositely and synchronously controlling pressure and flow |
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