CN104564854B - Multi executors heavy duty digital hydraulic loop based on high-pressure common rail cabin - Google Patents
Multi executors heavy duty digital hydraulic loop based on high-pressure common rail cabin Download PDFInfo
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- CN104564854B CN104564854B CN201410829698.8A CN201410829698A CN104564854B CN 104564854 B CN104564854 B CN 104564854B CN 201410829698 A CN201410829698 A CN 201410829698A CN 104564854 B CN104564854 B CN 104564854B
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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
- F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
- F15B1/02—Installations or systems with accumulators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/30—Controlling fuel injection
- F02D41/38—Controlling fuel injection of the high pressure type
- F02D41/3809—Common rail control systems
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/02—Systems essentially incorporating special features for controlling the speed or actuating force of an output member
- F15B11/028—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the actuating force
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
- F15B2211/25—Pressure control functions
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The present invention relates to Fluid Transmission and Control field, it is desirable to provide multi executors heavy duty digital hydraulic loop based on high-pressure common rail cabin.It is somebody's turn to do multi executors heavy duty digital hydraulic loop based on high-pressure common rail cabin, including oil supply system, high-speed switch valve group, electronic control unit and executor；Oil supply system includes electromotor, Flat valve plunger displacement pump, hyperbaric cabin, rotating speed rotary angle transmitter, temperature sensor, pressure transducer, guide proportion overflow valve, accumulator and relief valve, high-speed switch valve group arranges on the hydraulic fluid port of executor, can control the break-make of fluid between executor and hyperbaric cabin, executor and fuel tank respectively by electronic control unit.High-pressure common rail method and numeral hydraulic technique are combined by the present invention, not only increase the operating pressure of hydraulic system, play the advantage that hydraulic drive power density is big further, and utilizing high-speed switch valve to make hydraulic system simple and easy to control as unique control valve, the efficiency of simultaneity factor is also improved.
Description
Technical field
The present invention is the Fluid Transmission and Control field being characterized about mechanical, electrical, hydraulic control technology, particularly to based on height
The multi executors heavy duty digital hydraulic loop in pressure common rail cabin.
Background technology
The simulation hydraulic system that the many employings of existing engineering machinery are traditional, utilizes pump open circuit, a pump control multiple
Executor, controls the action of executor, due to system by load-sensitive valve, proportioning valve etc. between pump and executor
Operating pressure is typically between 25-35MPa, and the size causing executor can not be the least, therefore causes the size of whole system
Can not be the least, it is impossible to further reduce the physical dimension of complete machine.
In engineering machinery, digital hydraulic technology is utilized to carry out the design of hydraulic circuit at present also in conceptual phase, 2010
Year, the digital hydraulic loop being made up of with high-speed switch valve on wheel loader scholar substitutes traditional load-sensitive system
System, finds by simulation study, the system after improvement can reduce the energy expenditure of 33-63%.Engineering machinery has heavy duty
And the feature of multi executors, if it is possible to demand and then the raising of flow system flow is reduced by improving the pressure of hydraulic system
The power density ratio of Hydraulic Elements, then can significantly reduce the size of executor, thus also make the overall chi of engineering machinery
Very little become compact.
High-pressure common rail is hydraulic oil accumulation high-pressure oil pump carried with the common rail cabin with large volume, and utilizes electricity
Sub-control unit, pressure transducer, pressure-regulating valve etc. realizes accurate Stress control.At present, high-pressure common rail mainly should
Being used in Diesel engine high-pressure common rail fuel oil electric injection system, its common rail pressure can reach 200MPa, main purpose be by
Expulsion pressure and course of injection are completely separable, make hydraulic oil pressure unrelated with engine speed, are passing through electronic control unit
Control high-speed switch valve to regulate fuel injection amount, improve fuel efficiency.
Along with popularizing of digital hydraulic, the digital hydraulic loop being made up of high-speed switch valve is of increased attention,
Owing to oil-in and oil return opening can be realized individually controlling by high-speed switch valve such that it is able to realize speed more accurately
And Bit andits control, and owing to high-speed switch valve does not has a chock pressure difference, thus from efficiency from the point of view of the effect in digital hydraulic loop
Rate is higher than the hydraulic circuit being made up of traditional servo valve and proportioning valve.But when requiring the through-current capability of high-speed switch valve relatively
Time big, the response time of its switch is the slowest, and producing the high-speed switch valve that frequency response is high and flow is big is often a difficulty
Topic.But, if reducing the requirement to high-speed switch valve through-current capability, then it can reach the highest frequency response, its switch
Response time can reach Millisecond, so the development trend of high-speed switch valve is low discharge high frequency sound valve.High-speed switch valve
Frequency response its control performance the highest the best, the method frequently with pulsewidth modulation controls high-speed switch valve, yet with pulsewidth
Modulate the frequency response to valve and require the highest, therefore the most feasible way is to use pulse number modulation, i.e. with a lot of low discharge high frequencies
The high-speed switch valve rung forms the high-speed switch valve group of a big flow, by controlling a valve group medium-small flow switch valve
The number of on an off control its flow passed through, this reduces the requirement to high-speed switch valve frequency response, simultaneously by
High-speed switch valve in low discharge high frequency sound is following developing direction, and the method being controlled high-speed switch valve group by rapid pulse is had
There is the biggest market using value.
Summary of the invention
Present invention is primarily targeted at and overcome deficiency of the prior art, it is provided that one can further improve hydraulic system
Operating pressure, the multi executors heavy duty digital hydraulic based on high-pressure common rail cabin of power density ratio improving Hydraulic Elements returns
Road.For solving above-mentioned technical problem, the solution of the present invention is:
Multi executors heavy duty digital hydraulic loop based on high-pressure common rail cabin is provided, including oil supply system, high-speed switch valve group,
Electronic control unit and executor, described oil supply system includes electromotor, Flat valve plunger displacement pump, hyperbaric cabin, rotating speed corner
Sensor, temperature sensor, pressure transducer, guide proportion overflow valve, accumulator and relief valve；Described electromotor is used
In driving Flat valve plunger displacement pump, the oil-out of Flat valve plunger displacement pump is connected with the oil-in of hyperbaric cabin, guide proportion overflow valve
Oil return opening be connected with fuel tank A, the inlet port of Flat valve plunger displacement pump, oil-suction oil filter, fuel tank A are sequentially connected with；High
The oil return opening of ballasting is connected with the oil-in of relief valve, and the oil return opening of relief valve is connected with fuel tank B；Flat valve plunger displacement pump and
Connecting line between hyperbaric cabin is provided with guide proportion overflow valve, temperature sensor, pressure transducer, accumulator, temperature
Degree sensor, pressure transducer, guide proportion overflow valve, relief valve, the control signal wire difference of rotating speed rotary angle transmitter
It is connected with electronic control unit；
Described Flat valve plunger displacement pump is for being pumped into fluid in hyperbaric cabin, it is thus achieved that (pressure exists stable high-voltage oil liquid
More than 60MPa)；Rotating speed rotary angle transmitter is arranged in the rotating shaft of Flat valve plunger displacement pump, is used for obtaining Flat valve plunger displacement pump
Rotating speed, corner information, and by the rotating speed of acquisition, corner information input electronic control unit be monitored；Described temperature
Sensor, pressure transducer are respectively used to obtain the temperature of fluid, pressure in pipeline, and by the temperature obtained, pressure letter
Breath input electronic control unit is monitored；Described electronic control unit can be by controlling guide proportion overflow valve, regulation height
The pressure of ballasting inner fluid；Described accumulator sets pressure for the pressure ensureing hyperbaric cabin inner fluid at guide's proportional pressure control valve
Fluctuate within positive and negative the 5% of power；Described relief valve, for limiting the maximum pressure of hyperbaric cabin inner fluid, prevents high pressure simultaneously
Cabin inner fluid pressure declines the most rapidly；
Described high-speed switch valve group arranges on the hydraulic fluid port of executor, be respectively used to control executor and hyperbaric cabin, executor with
The break-make of fluid between fuel tank；Described high-speed switch valve group includes that the low discharge high frequency sound of at least four parallel join is opened at a high speed
Closing valve, and each high-speed switch valve group is respectively by connection to electronic control unit, electronic control unit is by controlling
The number that low discharge high frequency sound high-speed switch valve is opened, it is achieved to the control by the fluid flow of high-speed switch valve group, enter
And control the action of executor.
In the present invention, described electronic control unit includes display and programmable PLC.
In the present invention, described relief valve uses unloading overflow valve, and its unloading function is controlled by electronic control unit
System.
In the present invention, described low discharge high frequency sound high-speed switch valve uses two position two-way valve, and metered flow 1～
In the range of 5L/min.
In the present invention, described electromotor uses Diesel engine.
In the present invention, described executor includes the executor of the executor of bidirectional-movement, one-way movement；
Two hydraulic fluid ports of the executor of described bidirectional-movement are connected to two groups of high-speed switch valve groups, and each hydraulic fluid port connects
Two groups of high-speed switch valve groups, one group of high-speed switch valve group is connected with hyperbaric cabin, and another group high-speed switch valve group and fuel tank are even
Connecing, the most each hydraulic fluid port is designed with high-speed switch valve and the high-speed switch valve of fuel tank connection connected with hyperbaric cabin；
Two hydraulic fluid ports of the executor of described one-way movement are respectively oil-in and oil return opening, and oil-in is opened by a high speed
Closing valve group to be connected with hyperbaric cabin, oil return opening is connected with fuel tank by a high-speed switch valve group.
In the present invention, the executor of described bidirectional-movement includes single pole double acting hydraulic cylinder, two-way quantitative motor, unidirectional
The executor of motion includes unidirectional fixed displacement motor.
The operation principle of the present invention: the high-voltage oil liquid accumulated by hyperbaric cabin is transported to each by high-speed switch valve group and performs
Device, what each executor was same simultaneously flows back to fuel tank by high-speed switch valve group by fluid；Whole hydraulic system is by an electricity
Sub-control unit (ECU) controls, and by the desired moving law of input load and monitoring system operational parameters, controls every
The number that individual high-speed switch valve group medium-small flow high-speed switch valve is opened simultaneously, and then control the motion of load.
Compared with prior art, the invention has the beneficial effects as follows:
1, the present invention improves the operating pressure of hydraulic system by high-pressure common rail method, thus needed for being reduction executor
The flow wanted lays the foundation, and further improves the power density ratio of Hydraulic Elements, makes whole system become more
Compact.Traditional hydraulic system general work is in below 35MPa.And the side using high-pressure common rail that the present invention proposes
Method, utilizes the plunger displacement pump of Flat valve can pump the pressure oil liquid of at least 60MPa, and utilizes a volume bigger
Hyperbaric cabin accumulation is got up, and carrys out set pressure by pilot-operated proportional relief valve and accumulator, uses the side of high-pressure common rail
Method, when system stability is at a certain pressure, electromotor has only to consume little energy to maintain pump to rotate just.
2, utilize digital hydraulic technology to control executor and load motion rather than by traditional servo valve or
Proportioning valve controls.Owing to using high-speed switch valve to control, do not throttle loss, thus improves efficiency, simultaneously
Improve the controllability of system.
3, general digital hydraulic loop selects the method for pulsewidth modulation to be controlled, and not only the frequency response to valve requires very
Height, and volume produces pressure oscillation.The present invention uses several low discharge high frequency sound high-speed switch valve to form a high speed
Switch valve group, the number of the low discharge high-speed switch valve by opening in one valve group of control simultaneously controls by this valve
The fluid amount of group, so not only reduces the requirement to valve frequency response, also reduces pressure oscillation simultaneously.
4, traditional engineering machinery, agricultural machinery many employings load sensing control technique, hydraulic system is the most complicated, and
And efficiency is low.High-pressure common rail method and numeral hydraulic technique are combined by the present invention, not only increase the work of hydraulic system
Make pressure, further played the advantage that hydraulic drive power density is big, and utilized high-speed switch valve as uniquely
Control valve make hydraulic system simple and easy to control, the efficiency of simultaneity factor is also improved.
Accompanying drawing explanation
The hydraulic system principle figure that Fig. 1 is.
Reference in figure is: 1 fuel tank A；2 oil-suction oil filters；3 Diesel engines；4 Flat valve plunger displacement pumps；5
Guide proportion overflow valve；6 temperature sensors；7 pressure transducers；8 rotating speed rotary angle transmitters；9 accumulators；10 electronics
Control unit；11 hyperbaric cabins；12 relief valve；13 fuel tank B；14 unidirectional fixed displacement motors；15 two-way quantitative motors；16
Single pole double acting hydraulic cylinder；17 other executors；18.1-18.10 high-speed switch valve group；19.1-19.4 low discharge high frequency
Ring high-speed switch valve.
Detailed description of the invention
With detailed description of the invention, the present invention is described in further detail below in conjunction with the accompanying drawings:
Multi executors heavy duty digital hydraulic loop based on high-pressure common rail cabin as shown in Figure 1, including oil supply system, at a high speed
Switch valve group, electronic control unit 10 and executor.By by high-pressure common rail method and numeral hydraulic circuit Technology Integration
To together: the high-voltage oil liquid accumulated by hyperbaric cabin 11 is transported to each executor by high-speed switch valve group, simultaneously each
What executor was same flows back to fuel tank by high-speed switch valve group by fluid；Whole hydraulic system is by an electronic control unit 10
(ECU) control, by the desired moving law of input load and monitoring system operational parameters, control each speed-sensitive switch
The number that valve group medium-small flow high-speed switch valve is opened simultaneously, and then control the motion of load.
Oil supply system includes Diesel engine 3, Flat valve plunger displacement pump 4, hyperbaric cabin 11, rotating speed rotary angle transmitter 8, temperature
Degree sensor 6, pressure transducer 7, guide proportion overflow valve 5, accumulator 9 and relief valve 12；Oil supply system uses
Diesel engine electric spray technique mesohigh common rail method, it is possible to produce the pressure stable high-voltage oil liquid at more than 60MPa,
And electromotor only keeps pump to operate with the power that consumption is little during pressure stability.
Diesel engine 3 is used for driving Flat valve plunger displacement pump 4, the oil-out of Flat valve plunger displacement pump 4 and entering of hyperbaric cabin 11
Hydraulic fluid port connects, and the oil return opening of guide proportion overflow valve 5 is connected to fuel tank A1, the inlet port of Flat valve plunger displacement pump 4, suction
Oil oil filter 2, fuel tank A1 are sequentially connected with, and the oil return opening of hyperbaric cabin 11 is connected with the oil-in of relief valve 12, safety
The oil-in of valve 12 is connected with fuel tank B13；Connecting line between Flat valve plunger displacement pump 4 and hyperbaric cabin 11 is provided with elder generation
Lead proportional pressure control valve 5, temperature sensor 6, pressure transducer 7, accumulator 9, temperature sensor 6, pressure transducer
7, guide proportion overflow valve 5, relief valve 12, the control signal wire of rotating speed rotary angle transmitter 8 are connected to Electronic Control list
Unit 10.
Utilize Flat valve plunger displacement pump 4 that high-voltage oil liquid (pressure is at more than 60MPa) is pumped into the hyperbaric cabin that volume is bigger
In 11, it is similar to common rail cabin.Described electronic control unit 10 can pass through guide by controlling guide proportion overflow valve 5
Formula proportional pressure control valve 5 sets up system pressure, and utilizes accumulator 9 to make hyperbaric cabin 11 pressure ripple in the least scope
Dynamic, limit the safe pressure of hyperbaric cabin 11 by relief valve 12 and prevent hyperbaric cabin 11 pressure from reducing suddenly.Rotating speed
Rotary angle transmitter 8 is arranged in the rotating shaft of Flat valve plunger displacement pump 4, for obtaining the rotating speed of Flat valve plunger displacement pump 4, corner
Information, and the rotating speed of acquisition, corner information input electronic control unit 10 are monitored.Temperature sensor 6, pressure
Sensor 7 is respectively used to obtain the temperature of fluid, pressure in pipeline, and by the temperature obtained, pressure information input electronics
Control unit 10 is monitored.Relief valve 12 uses unloading overflow valve, and its unloading function is by electronic control unit 10
It is controlled.Oil supply system provides a stable high-voltage oil liquid source by the method for high-pressure common rail for hydraulic system, for carrying
The power density ratio of high actuator element lays the first stone.
High-speed switch valve group arranges on the hydraulic fluid port of executor, is respectively used to control executor and hyperbaric cabin 11, executor and oil
The break-make of fluid between case, improves efficiency by digital hydraulic technology.High-speed switch valve group includes that at least four is (according to negative
Depending on load demand) the identical low discharge high frequency sound high-speed switch valve of parallel join, the high speed of these low discharge high frequency sounds is opened
The metered flow of pass valve is in the range of 1-5L/min, owing to metered flow is the least, and the switch response time of high-speed switch valve
Millisecond can be reached；And low discharge high frequency sound high-speed switch valve has response time soon, high pressure resistant and through-current capability is little
Feature.Each high-speed switch valve group is passed through to electronic control unit 10, electronic control unit 10 by connection respectively
The method that rapid pulse controls, i.e. controls the low discharge high frequency sound high-speed switch valve opened simultaneously or close in high-speed switch valve group
Number control the fluid amount passed through, and then control speed, rotating speed, power or the moment of load.Low discharge high frequency sound
High-speed switch valve uses two position two-way valve.
This hydraulic system is particularly well-suited to multi executors loop, and executor includes the executor of bidirectional-movement, one-way movement
Executor；The executor of bidirectional-movement includes single pole double acting hydraulic cylinder 16, two-way quantitative motor 15, one-way movement
Executor includes unidirectional fixed displacement motor 14.In addition, owing to the switching process of high-speed switch valve does not throttle loss, therefore
For the hydraulic system of this system traditional servo valve of contrast and proportioning valve composition, there is higher efficiency.
Two hydraulic fluid ports of the executor of bidirectional-movement are connected to two groups of high-speed switch valve groups, and the two of the connection of each hydraulic fluid port
Group high-speed switch valve group, one group of high-speed switch valve group is connected with hyperbaric cabin 11, and another group high-speed switch valve group is with fuel tank even
Connecing, the most each hydraulic fluid port is designed with high-speed switch valve and the high-speed switch valve of fuel tank connection connected with hyperbaric cabin 11.Example
Rod chamber such as single pole double acting hydraulic cylinder 16 is connected with high-speed switch valve group 18.1 and high-speed switch valve group 18.2 respectively,
High-speed switch valve group 18.1 is connected with fuel tank A1 again, controls the break-make of fluid between rod chamber and fuel tank A1, opens at a high speed
Close valve group 18.2 to be connected with hyperbaric cabin 11 again, be responsible for the break-make of fluid between rod chamber and hyperbaric cabin 11；Single pole double cropping
It is connected with high-speed switch valve group 18.3 and high-speed switch valve group 18.4 respectively with the rodless cavity of hydraulic cylinder 16, is each responsible for
The break-make of fluid between the break-make of fluid, rodless cavity and fuel tank A1 between rodless cavity and hyperbaric cabin 11.All of valve group is all
It is controlled by electronic control unit 10, to left movement and increases power output if desired for hydraulic cylinder piston rod, then need
The n that requires to control in high-speed switch valve group 18.3 according to loading speed (n=3,4 ...) individual low discharge high frequency sound speed-sensitive switch
Valve 19 is opened, simultaneously need to m the low discharge high frequency sound high-speed switch valve 19 dozens opened in high-speed switch valve group 18.1
Open, must wherein be fulfilled for n > m, so could increase power output, when needs pace of change or change power output
Wait, it is only necessary to changed the numerical value of n and m by electronic control unit 10, i.e. can obtain preferable speed or power is defeated
Go out curve.To drive piston rod to move right, at this moment need to control high-speed switch valve group 18.2 and high-speed switch valve group
The number of the low discharge high frequency sound high-speed switch valve 19 opened in 18.4, by changing the size of number, same also may be used
To reach required loading speed or power curve of output.For two-way quantitative motor 15, its control method is similar and single
Bar double acting hydraulic cylinder 16.
Two hydraulic fluid ports of the executor of one-way movement are respectively oil-in and oil return opening, and oil-in passes through a high-speed switch valve
Group is connected with hyperbaric cabin 11, and oil return opening is connected with fuel tank A1 by a high-speed switch valve group.The most unidirectional fixed displacement motor
The oil-in of 14 is connected with hyperbaric cabin 11 by a high-speed switch valve group 18.9, controls oil between itself and hyperbaric cabin 11
The break-make of liquid, the oil return opening of unidirectional fixed displacement motor 14 is connected with fuel tank A1 by another high-speed switch valve group 18.10,
Control the break-make of fluid between itself and fuel tank A1.By controlling high-speed switch valve group 18.9 and high-speed switch valve group 18.10
In the number of low discharge high frequency sound high-speed switch valve 19 opened, regulate unidirectional fixed displacement motor 14 oil-in and oil return opening
Between pressure reduction so that motor output torque produce change, simultaneously change oil-in the low discharge high frequency opened
Ring the number of high-speed switch valve 19, have also been changed the input flow rate of unidirectional fixed displacement motor 14 so that it is rotating speed changes.
Therefore by changing the low discharge high frequency sound high-speed switch valve opened in high-speed switch valve group 18.9 and high-speed switch valve group 18.10
The number of 19, can change rotating speed and the torque of unidirectional fixed displacement motor 14 so that it is change according to the demand of load.
It addition, electronic control unit 10 can use display to add programmable PLC composition.
In sum, high-pressure common rail method and digital hydraulic technology are combined by the present invention, not only increase hydraulic system
Pressure (more than 60MP), improve Hydraulic Elements power density ratio, make whole hydraulic system the compactest, with
Time improve the efficiency of system.And by improving pressure, make on the premise of output equal-wattage required for load
Flow diminishes, so that the high-speed switch valve group of the high-speed switch valve composition of low discharge high frequency sound can be applied to this type of liquid
Push back in road, and due to the good controllability of high-speed switch valve so that it is can reach preferably to control effect.
The present invention is operationally:
First system boosting, reaches the pressure specified: fluid is pumped into hyperbaric cabin 11 by Flat valve plunger displacement pump 4, now
High-speed switch valve group is completely in normally off, and the oil pressure relief of pilot-operated proportional relief valve 5 is set up specified pressure,
Along with increasing of hyperbaric cabin 11 fluid, oil liquid pressure is gradually increasing, and observes pressure transducer 7 when reaching specified pressure
Time, the fluid of pumping overflows from pilot-operated proportional relief valve 5, and now Diesel engine 3 need to consume small part energy dimension
Hold pump low-speed running.Relief valve 12 is used for limiting the maximum pressure of hyperbaric cabin 11 fluid, dashes forward when oil liquid pressure simultaneously
When so declining (hydraulic oil pipeline or hyperbaric cabin 11 occur in that leakage), electronic control unit 10 can control relief valve
12 open in time and carry out off-load.Rotating speed rotary angle transmitter 8, temperature sensor 6 grade is used for monitoring the ginseng that hydraulic system is run
Number, to be used for carrying out the assessment of efficiency.
Each high-speed switch valve group is made up of several low discharge high frequency sound high-speed switch valves 19, and concrete quantity will be according to reality
Under the operating mode of border, the maximum functional flow required for load is determined.Each low discharge high frequency sound high-speed switch valve 19 can reach
To the highest frequency response, its switch time can be again within 1ms, therefore its control performance is superior, by several low discharge high frequencies
Sound high-speed switch valve 19 is together in parallel and forms a high-speed switch valve group, is equivalent to the speed-sensitive switch of a big flow
Valve, and the low discharge high frequency sound high-speed switch valve 19 that i.e. controls simultaneously to open of the method owing to using rapid pulse to control
Several flows flowing in or out high-speed switch valve group that regulate, thus high-speed switch valve group not only has bigger flow together
Time also have higher switching speed concurrently, and traditional high-speed switch valve does not often reach Millisecond in the case of big flow
Switching speed, therefore adopt in this way: i.e. utilize the low discharge high-speed switch valve of several parallel connection to form a big stream
Amount high-speed switch valve, and utilize the method that rapid pulse controls, it is possible to obtain one and be equivalent to that i.e. there is big flow and ring simultaneously
High-speed switch valve that should be the fastest.
It is only the specific embodiment of the present invention finally it should be noted that listed above.Obviously, the present invention does not limits
In above example, it is also possible to there is many variations.Those of ordinary skill in the art can be from present disclosure
The all deformation directly derived or associate, are all considered as protection scope of the present invention.
Claims (7)
1. multi executors heavy duty digital hydraulic loop based on high-pressure common rail cabin, including oil supply system, high-speed switch valve group,
Electronic control unit and executor, it is characterised in that described oil supply system includes electromotor, Flat valve plunger displacement pump, high pressure
Cabin, rotating speed rotary angle transmitter, temperature sensor, pressure transducer, guide proportion overflow valve, accumulator and relief valve；
Described electromotor is used for driving Flat valve plunger displacement pump, the oil-out of Flat valve plunger displacement pump to be connected with the oil-in of hyperbaric cabin, first
The oil return opening leading proportional pressure control valve is connected with fuel tank A, the inlet port of Flat valve plunger displacement pump, oil-suction oil filter, fuel tank A
It is sequentially connected with；The oil return opening of hyperbaric cabin is connected with the oil-in of relief valve, and the oil return opening of relief valve is connected with fuel tank B；Valve
Connecting line between assigning plunger pump and hyperbaric cabin be provided with guide proportion overflow valve, temperature sensor, pressure transducer,
Accumulator, temperature sensor, pressure transducer, guide proportion overflow valve, relief valve, the control of rotating speed rotary angle transmitter
Holding wire is connected with electronic control unit respectively；
Described Flat valve plunger displacement pump is for being pumped into fluid in hyperbaric cabin, it is thus achieved that stable high-voltage oil liquid；Rotating speed corner passes
Sensor is arranged in the rotating shaft of Flat valve plunger displacement pump, for obtaining the rotating speed of Flat valve plunger displacement pump, corner information, and will obtain
The rotating speed, the corner information input electronic control unit that obtain are monitored；Described temperature sensor, pressure transducer are used respectively
In obtaining the temperature of fluid, pressure in pipeline, and the temperature of acquisition, pressure information input electronic control unit are supervised
Survey；Described electronic control unit can be by controlling guide proportion overflow valve, the pressure of regulation hyperbaric cabin inner fluid；Described storage
Can fluctuate within guide's proportional pressure control valve sets positive and negative the 5% of pressure for the pressure ensureing hyperbaric cabin inner fluid by device；Institute
State relief valve for limiting the maximum pressure of hyperbaric cabin inner fluid, prevent hyperbaric cabin inner fluid pressure the most rapid simultaneously
Decline；
Described high-speed switch valve group arranges on the hydraulic fluid port of executor, be respectively used to control executor and hyperbaric cabin, executor with
The break-make of fluid between fuel tank；Described high-speed switch valve group includes that the low discharge high frequency sound of at least four parallel join is opened at a high speed
Closing valve, and each high-speed switch valve group is respectively by connection to electronic control unit, electronic control unit is by controlling
The number that low discharge high frequency sound high-speed switch valve is opened, it is achieved to the control by the fluid flow of high-speed switch valve group, enter
And control the action of executor.
Multi executors heavy duty digital hydraulic loop based on high-pressure common rail cabin the most according to claim 1, its feature
Being, described electronic control unit includes display and programmable PLC.
Multi executors heavy duty digital hydraulic loop based on high-pressure common rail cabin the most according to claim 1, its feature
Being, described relief valve uses unloading overflow valve, and its unloading function is controlled by electronic control unit.
Multi executors heavy duty digital hydraulic loop based on high-pressure common rail cabin the most according to claim 1, its feature
Being, described low discharge high frequency sound high-speed switch valve uses two position two-way valve, and metered flow is in the range of 1～5L/min.
Multi executors heavy duty digital hydraulic loop based on high-pressure common rail cabin the most according to claim 1, its feature
Being, described electromotor uses Diesel engine.
Multi executors heavy duty digital hydraulic loop based on high-pressure common rail cabin the most according to claim 1, its feature
Being, described executor includes the executor of the executor of bidirectional-movement, one-way movement；
Two hydraulic fluid ports of the executor of described bidirectional-movement are connected to two groups of high-speed switch valve groups, and each hydraulic fluid port connects
Two groups of high-speed switch valve groups, one group of high-speed switch valve group is connected with hyperbaric cabin, and another group high-speed switch valve group and fuel tank are even
Connecing, the most each hydraulic fluid port is designed with high-speed switch valve and the high-speed switch valve of fuel tank connection connected with hyperbaric cabin；
Two hydraulic fluid ports of the executor of described one-way movement are respectively oil-in and oil return opening, and oil-in is opened by a high speed
Closing valve group to be connected with hyperbaric cabin, oil return opening is connected with fuel tank by a high-speed switch valve group.
Multi executors heavy duty digital hydraulic loop based on high-pressure common rail cabin the most according to claim 6, its feature
Being, the executor of described bidirectional-movement includes single pole double acting hydraulic cylinder, two-way quantitative motor, the execution of one-way movement
Device includes unidirectional fixed displacement motor.
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| CN105626247B (en) * | 2016-01-21 | 2021-01-08 | 建艺国际工程管理集团有限公司 | Bridge construction device with optimal control system |
| CN107387852A (en) * | 2016-05-17 | 2017-11-24 | 高金龙 | Hydraulic valve remote control operation system |
| CN110242461B (en) * | 2019-07-11 | 2024-01-23 | 无锡格迪斯机械制造有限公司 | High-pressure common rail oil supply device |
| CN110762065A (en) * | 2019-10-30 | 2020-02-07 | 燕山大学 | Digital hydraulic actuator system for closed pump valve composite speed regulation and control method thereof |
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| JP4196869B2 (en) * | 2004-03-31 | 2008-12-17 | 三菱ふそうトラック・バス株式会社 | Fuel injection device |
| CN201547071U (en) * | 2009-11-19 | 2010-08-11 | 上海交通大学 | DD servo oil cylinder with high-speed switching |
| CN101968028A (en) * | 2010-09-17 | 2011-02-09 | 上海交通大学 | Digital type assignment and regulating mechanism of low-speed and large-torsion hydraulic motor with crankshaft connecting rod |
| CN102072079B (en) * | 2010-12-18 | 2013-05-29 | 上海交通大学 | Speed regulation type hydraulic motor based on digital distribution |
| CN202578989U (en) * | 2012-03-31 | 2012-12-05 | 上海艾铭思汽车控制系统有限公司 | Combined electric control high-pressure common-rail diesel oil injection device |
| CN204493301U (en) * | 2014-12-26 | 2015-07-22 | 浙江大学 | Based on the multi executors heavy duty digital hydraulic loop in high-pressure common rail cabin |
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