CN110258684A - A kind of energy saver of excavator swing arm single cylinder pressure-bearing energy regenerating and recycling - Google Patents
A kind of energy saver of excavator swing arm single cylinder pressure-bearing energy regenerating and recycling Download PDFInfo
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- CN110258684A CN110258684A CN201910543040.3A CN201910543040A CN110258684A CN 110258684 A CN110258684 A CN 110258684A CN 201910543040 A CN201910543040 A CN 201910543040A CN 110258684 A CN110258684 A CN 110258684A
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- valve
- control valve
- mouth
- swing arm
- directional control
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F3/00—Dredgers; Soil-shifting machines
- E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
- E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
- E02F3/36—Component parts
- E02F3/42—Drives for dippers, buckets, dipper-arms or bucket-arms
- E02F3/425—Drive systems for dipper-arms, backhoes or the like
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/22—Hydraulic or pneumatic drives
- E02F9/2217—Hydraulic or pneumatic drives with energy recovery arrangements, e.g. using accumulators, flywheels
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/22—Hydraulic or pneumatic drives
- E02F9/2264—Arrangements or adaptations of elements for hydraulic drives
- E02F9/2267—Valves or distributors
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Operation Control Of Excavators (AREA)
Abstract
A kind of energy saver of excavator swing arm single cylinder pressure-bearing energy regenerating and recycling, energy saver includes controller, two-bit triplet electromagnetic switch valve group, 2/2-way electromagnetic switch valve group, proportional flow control valve, accumulator and several pressure sensors, during swing arm decline, controller, which controls proportional reversing valve in energy saver and electromagnetic switch valve group by pilot control valve group, makes boom cylinder pressure-bearing recycle hydraulic energy, another boom cylinder rodless cavity oil liquid is communicated with the epicoele of two oil cylinders realizes that flow regenerates；When excavator revolution terminates to enter overflow damped condition, controller issues control signal and switches corresponding solenoid directional control valve, the high pressure oil that rotary motor exports is introduced into proportional flow control valve, the hydraulic energy that rotary braking kinetic energy is converted is stored in accumulator.The invention avoids throttlings and spill losses that oil liquid when swing arm decline in original hydraulic system and rotary braking is generated through hydraulic valve, improve the efficiency of hydraulic system, energy-saving effect is good.
Description
Technical field
The present invention relates to a kind of excavator energy recycle devices, and in particular to a kind of excavator swing arm single cylinder pressure-bearing energy time
The energy saver received and recycled, belongs to excavator technical field of hydraulic pressure.
Background technique
In traditional hydraulic crawler excavator, the output power that engine only has 20% is changed into the effective power of excavator.With
The increasingly exacerbation of energy shortage and environmental pollution, the effective rate of utilization of the energy become the evaluation whether advanced important mark of excavator
One of standard.In the hydraulic crawler excavator course of work, swing arm lifting action is frequent, and since equipment quality is big, in decline process
In can release a large amount of potential energy, the energy through boom cylinder be converted into the hydraulic energy overwhelming majority consumption hydraulic valve restriction simultaneously
Be converted to thermal energy；Excavator rotator inertia is big, and frequent rotary braking under typical condition, a large amount of rotation functions are converted into hydraulic energy simultaneously
Also become thermal energy through valve overflow, to cause energy dissipation and system heat generation, reduces the service life of Hydraulic Elements.
Energy regenerating research is one of hot issues of engineering machinery fields such as hydraulic crawler excavator, is worked one, excavator
The energy utilization situation of each hydraulic actuator carries out quantitative calculating in circulation, and executive component accounts for about master using energy as the result is shown
The 80.6% of energy output by pump.Analysis to recoverable energy the result shows that, swing arm recoverable energy accounts for about main energy output by pump
17.7%, revolution recoverable energy account for about the 9.2% of main energy output by pump.By above analysis it is found that carrying out under swing arm
The recycling and recycling for dropping potential energy and gyroscopic moment are the key that improve efficiency of excavator.
Recycling for excavator swing arm potential energy rotary kinetic energy generally uses fluid pressure type and electric, at present electric energy
Amount recovery method has that the device is complicated, higher cost, due to electric energy storage components and the higher cost of generator, limits
The application of the recovery scheme in practice, and the conversion repeatedly of mechanical energy, pressure energy, electric energy also reduces the benefit of energy regenerating
With rate；Existing hydraulic energy recyclable device, by transformation boom cylinder or configuration booster, oil cylinder cavity of resorption when swing arm is declined
It is stored in hydraulic accumulator in a manner of pressure energy after pressure boost, swing arm discharges the high pressure oil in accumulator again and lifts when rising
Swing arm is risen, but this mode is larger to the change of excavator original structure, the maneuverability of excavator is poor, the cost of energy saver
It is high.
Summary of the invention
In order to overcome various deficiencies of the existing technology, the present invention provides a kind of excavator swing arm single cylinder pressure-bearing energy time
The energy saver received and recycled can recycle swing arm under the premise of not influencing handling excavator and swing arm kinetic stability
The hydraulic energy of the kinetic energy conversion of potential energy and rotary motor braking when decline, is stored in accumulator, will store again when swing arm rises
The energy release stored in energy device avoids swing arm decline and rotary braking in original hydraulic system for excavator swing arm lifting
When the oil liquid throttling and spill losses that are generated through hydraulic valve, improve the efficiency of hydraulic system, reduce the radiator that system is equipped with
The specification of equipment, energy-saving effect are good.
In order to achieve the above-mentioned object of the invention, a kind of excavator swing arm single cylinder pressure-bearing energy regenerating of the present invention and the section of recycling
Energy device, this energy saver are mounted in original hydraulic system with separate modular, and original hydraulic system includes pilot control valve group, ratio
The valve group that commutates and the first swing arm lock-up valve and the first pilot operated directional control valve, energy saver include controller, two-bit triplet electromagnetic switch
Valve group, 2/2-way electromagnetic switch valve group, proportional flow control valve, accumulator and several pressure sensors；During swing arm decline,
Controller by pilot control valve group control energy saver in proportional flow control valve and two-bit triplet electromagnetic switch valve group make one
Boom cylinder pressure-bearing recycles hydraulic energy, another boom cylinder rodless cavity oil liquid is communicated with the epicoele of two oil cylinders realizes flow again
It is raw；When excavator revolution terminates to enter overflow damped condition, controller issues control signal and switches corresponding solenoid directional control valve, time
The high pressure oil for turning motor outlet is introduced into proportional flow control valve, and the hydraulic energy that rotary braking kinetic energy is converted is stored in accumulator；Control
Device acquires corresponding position pressure signal by the pressure sensor of setting, issues the amount of opening of control Signal Regulation ratio flow valve
And each solenoid directional control valve realizes the recycling and release process of oil liquid, keeps the maneuverability of excavator identical as original system work.
Specifically, pilot control valve group include the first pilot control valve, the second pilot control valve, third pilot control valve,
4th pilot control valve, the A mouth of control the signal xBmA and the second two-bit triplet solenoid directional control valve of the output of the first pilot control valve
It is connected；The control signal xBmB of second pilot control valve output simultaneously with A mouth of the first two-bit triplet solenoid directional control valve, control the
Second pilot operated directional control valve control terminal of two swing arm lock-up valves, the third pilot operated directional control valve control terminal phase for controlling third swing arm lock-up valve
Even；Third pilot control valve output control signal xSwA and the 4th pilot control valve output control signal xSwB respectively with original
Two control port signals of the second proportional reversing valve in hydraulic system are connected.
Further, B mouthfuls of the B mouth of the second two-bit triplet solenoid directional control valve and the first two-bit triplet solenoid directional control valve simultaneously with
The C mouth of fuel tank connection, the first two-bit triplet solenoid directional control valve exports two controls signal xBm1A and xBm2A, the second two-bit triplet
The C mouth of solenoid directional control valve exports a control signal xBm1B, controls signal xBm1A and xBm1B respectively and in original hydraulic system
Two control port signals of the first proportional reversing valve are connected, while controlling signal xBm1B and controlling the first swing arm lock-up valve
First pilot operated directional control valve control terminal is connected, and control signal xBm2A controls end signal phase with the interflow reversal valve in former hydraulic control system
Even.
Further, the oil outlet of the first variable pump is connected with the c of the first proportional reversing valve mouth all the way, and another way is by the
One check valve is connected with the b of the first proportional reversing valve mouth, a mouth of the first proportional reversing valve, f mouthfuls be connected with fuel tank, first ratio
The d mouth of example reversal valve is connected with the rod end chamber of the first boom cylinder and the second boom cylinder, the e mouth warp of the first proportional reversing valve
Cross A mouth of the first swing arm lock-up valve simultaneously with the A mouth of the 4th two-bit triplet solenoid directional control valve, the 5th two-bit triplet solenoid directional control valve
It is connected, through by successively going here and there after the B mouth parallel connection of the A mouth, the 5th two-bit triplet solenoid directional control valve of third two-bit triplet solenoid directional control valve
The solenoid-operated proportional flow valve of connection, the second two-bit triplet solenoid directional control valve are connected with accumulator, the 4th two-bit triplet solenoid directional control valve
C mouth be connected with the rodless cavity of the first boom cylinder by the second swing arm lock-up valve, the C mouth of the 5th two-bit triplet solenoid directional control valve
It is connected by third swing arm lock-up valve with the rodless cavity of the second boom cylinder.
Further, the B mouth of the 4th two-bit triplet solenoid directional control valve after third two-bit triplet solenoid directional control valve again with
The B mouth of 5th two-bit triplet solenoid directional control valve is in parallel, and the B mouth of third two-bit triplet solenoid directional control valve is connected to the first boom cylinder
With the rod end chamber of the second boom cylinder.
Further, the oil that the B mouth of third two-bit triplet solenoid directional control valve is connected with the rod end chamber of the second boom cylinder
A road first 2/2-way solenoid directional control valve in parallel, the oil outlet of the first 2/2-way solenoid directional control valve are unidirectional by third
Valve is connected with fuel tank.
In order to recycle rotary braking energy, two oil outlets of rotary motor respectively with two oil inlet phases of the second shuttle valve
Even, the oil outlet of the second shuttle valve is connected in parallel to the A of third two-bit triplet solenoid directional control valve by the second 2/2-way solenoid directional control valve
On the oil circuit that mouth is connected with solenoid-operated proportional flow valve.
Further, the oil outlet of the second variable pump is divided into two-way after second one-way valve, changes respectively with the second ratio
Be connected to a mouth of valve with b mouthfuls, the c mouth of the second proportional reversing valve is connected with fuel tank, the d mouth of the second proportional reversing valve simultaneously with conjunction
Flow reversal valve a mouth, b mouthful it is connected, the e mouth of the second proportional reversing valve and f mouthfuls are connected with two hydraulic fluid ports of rotary motor respectively, conjunction
The e mouth of stream reversal valve is changed by the 4th check valve with the second overload oil compensating valve, the first swing arm lock-up valve, the 5th two-bit triplet electromagnetism
Be connected to the A mouth of valve, the first overload oil compensating valve is connected in parallel on the d mouth of the first proportional reversing valve, then with the first boom cylinder and second
Boom cylinder rod end chamber is connected.
Specifically, the oil circuit that is connected with the A mouth of the second two-bit triplet solenoid directional control valve of the first pilot control valve is equipped with the
One pressure sensor, the oil circuit that the second pilot control valve is connected with the A mouth of the first two-bit triplet solenoid directional control valve are equipped with second
Pressure sensor, two control ports of third pilot control valve and the 4th pilot control valve respectively with two oil inlets of the first shuttle valve
Mouth is connected, and the oil outlet of the first shuttle valve is equipped with third pressure sensor, accumulator and the second two-bit triplet solenoid directional control valve phase
Oil circuit even is equipped with the 4th pressure sensor, is connected between the second shuttle valve oil outlet and the second 2/2-way solenoid directional control valve
Oil circuit is equipped with the 5th pressure sensor, and the oil circuit that the first boom cylinder rodless cavity is connected with the second swing arm lock-up valve is equipped with the
Six pressure sensors, the oil circuit that the second boom cylinder rodless cavity is connected with third swing arm lock-up valve are equipped with the 7th pressure sensing
Device.
Shut-off valve is installed on the oil circuit that accumulator is connected with fuel tank.
The present invention according to pressure value that pressure sensor measures and can utilize controller analysis mining machine current working, thus
Each electromagnetism valve events are controlled, energy saver is allow to cut hydraulic circuit automatically；Cavity pressure is small under oil cylinder when due to swing arm decline
The cavity pressure under oil cylinder when swing arm rises, therefore single cylinder pressure-bearing recovered liquid energy is utilized when swing arm of the present invention decline, and another swing arm
Oil cylinder cavity of resorption oil liquid is communicated with the epicoele of two boom cylinders, is not only realized increasing for pressure recovery in this way, is also achieved flow
Regeneration, does not need system fuel feeding；Swing arm decline during, controller synthesis analyze pilot control pressure, boom cylinder pressure and
Energy storage pressure issues the amount of opening of control Signal Regulation ratio flow valve, makes swing arm descent performance with intelligent control method
It is identical as original system maneuverability；When controller detects that excavator revolution terminates to enter overflow damped condition, control letter is issued
The high pressure oil that rotary motor exports is introduced into proportional flow control valve, is moved rotary braking by proportional flow control valve by number switching solenoid valve
The hydraulic energy that can be converted is stored in accumulator；When the energy stored in accumulator reaches setting value, controlled by controller corresponding
Solenoid valve and proportional flow control valve will be in accumulator under the premise of not influencing that excavator is handling and swing arm kinetic stability
The energy of storage discharges, and lifts operating condition for excavator swing arm, when avoiding swing arm decline and rotary braking in original hydraulic system
The throttling and spill losses that oil liquid is generated through hydraulic valve, improve the efficiency of hydraulic system, largely avoid because of oil
The phenomenon that liquid temperature increases and leads to system heat generation reduces the specification of the heat sink apparatus of system outfit, has apparent section
It can effect.
The present invention is transformed compared with existing excavator liquid can recycle device without booster or boom cylinder
At three chambers, structure is simple, small in size, light weight and cost is low, high reliablity；By controller and proportional flow control valve intelligent control oil
The recycling of liquid and release process control are good；The hydraulic energy of swing arm decline potential energy and the conversion of rotary braking kinetic energy can be recycled for moving
Arm lifting, energy regenerating gross efficiency is high, excavator oil consumption is lower, system heat generation is few, oil liquid temperature rise is small, matched cooling device specification
Small driving force is low.
Detailed description of the invention
Fig. 1 is hydraulic system principle figure in the present invention；
Fig. 2 is the hardware composition block diagram of energy saver control system of the invention；
Fig. 3 is swing arm decline recycling hydraulic energy operating condition energy saver equivalent hydraulic system；
Fig. 4 is that swing arm rises release hydraulic energy operating condition energy saver equivalent hydraulic system；
Fig. 5 is rotary motor braking recycling hydraulic energy operating condition energy saver equivalent hydraulic system；
In figure: 10, the first variable pump；11, the second variable pump；12, auxiliary pump；13, the first proportional reversing valve；14, second
Proportional reversing valve；15, collaborate reversal valve；16, the first overload oil compensating valve；17, the second overload oil compensating valve；18, the first swing arm locks
Valve；19, the first pilot operated directional control valve；20, the 4th check valve；21, the first pilot control valve；22, the second pilot control valve；23,
Three pilot control valves；24, the 4th pilot control valve；25, first pressure sensor；26, second pressure sensor；27, the first shuttle
Valve；28, third pressure sensor；29, the first check valve；30, second one-way valve；40, solenoid-operated proportional flow valve；41, accumulator；
42, the second two-bit triplet solenoid directional control valve；43, the 4th pressure sensor；44, shut-off valve；45, the first two-bit triplet electromagnetic switch
Valve；46, the second two-bit triplet solenoid directional control valve；47, third two-bit triplet solenoid directional control valve；48, the 4th two-bit triplet electromagnetism changes
To valve；49, the 5th two-bit triplet solenoid directional control valve；50, the second pilot operated directional control valve；51, third pilot operated directional control valve；52, second is dynamic
Arm lock-up valve；53, third swing arm lock-up valve；54, third check valve；55, the first 2/2-way solenoid directional control valve；56, the 6th pressure
Force snesor；57, the 7th pressure sensor；60, the second shuttle valve；61, the 5th pressure sensor；62, the second 2/2-way electromagnetism
Reversal valve；70, the first boom cylinder；71, the second boom cylinder；72, rotary motor.
Specific embodiment
The present invention is described in detail in the following with reference to the drawings and specific embodiments.
The present invention only recycles Hydraulic Excavator's Boom potential energy and rotary kinetic energy, therefore the dipper of excavator is omitted in Fig. 1
The hydraulic circuits such as oil cylinder, bucket cylinder.
As shown in Figure 1, the energy saver of a kind of excavator swing arm single cylinder pressure-bearing energy regenerating and recycling, with separate modular
Be mounted in original hydraulic system, original hydraulic system include pilot control valve group, proportional reversing valve group and the first swing arm lock-up valve and
First pilot operated directional control valve, energy saver include controller, two-bit triplet electromagnetic switch valve group, 2/2-way electromagnetic switch valve group,
Proportional flow control valve, accumulator and several pressure sensors；During swing arm decline, controller is controlled by pilot control valve group
Electromagnetic switch valve group in proportional reversing valve group and energy saver makes a boom cylinder pressure-bearing recycling hydraulic energy, another is dynamic
Arm oil cylinder rodless cavity oil liquid is communicated with the epicoele of two oil cylinders；When excavator revolution terminates to enter overflow damped condition, controller hair
Control signal switches corresponding solenoid directional control valve out, and the high pressure oil that rotary motor exports is introduced into proportional flow control valve, revolution is made
The hydraulic energy of dynamic kinetic energy conversion is stored in accumulator；Controller acquires corresponding position pressure signal by the pressure sensor of setting,
The amount of opening and each solenoid directional control valve for issuing control Signal Regulation ratio flow valve realize the recycling and release process of oil liquid, make to dig
The maneuverability of pick machine is identical as original system work.
Specifically, pilot control valve group includes the first pilot control valve 21, the second pilot control valve 22, third pilot control
The control signal xBmA of valve 23, the 4th pilot control valve 24, the output of the first pilot control valve 21 is changed with the second two-bit triplet electromagnetism
It is connected to the A mouth of valve 46；Second pilot control valve 22 output control signal xBmB simultaneously with the first two-bit triplet electromagnetic switch
The A mouth of valve 45, controls third swing arm lock-up valve 53 at 50 control terminal of the second pilot operated directional control valve for controlling the second swing arm lock-up valve 52
51 control terminal of third pilot operated directional control valve is connected；The control signal xSwA and the 4th pilot control valve that third pilot control valve 23 exports
24 output control signal xSwB respectively with two control port signal phases of the second proportional reversing valve 14 in original hydraulic system
Even.
Further, 45B mouthful of the B mouth of the second two-bit triplet solenoid directional control valve 46 and the first two-bit triplet solenoid directional control valve be together
When be connected to fuel tank, the C mouth of the second two-bit triplet solenoid directional control valve 46 exports two control signal xBm1A and xBm2A, first liang
Position three-way solenoid valve 45 C mouth export a control signal xBm1B, control signal xBm1A and xBm1B respectively with stoste pressure
Two control port signals of the first proportional reversing valve 13 in system are connected, and control signal xBm1B is dynamic with control first simultaneously
19 control terminal of the first pilot operated directional control valve of arm lock-up valve 18 is connected, and the interflow in control signal xBm2A and former hydraulic control system is commutated
Valve 15 controls end signal and is connected.
Further, the oil outlet of the first variable pump 10 is connected with the c mouth of the first proportional reversing valve 13 all the way, another way warp
The first check valve 29 is crossed to be connected with the b mouth of the first proportional reversing valve 13, a mouth of the first proportional reversing valve 13, f mouthfuls with fuel tank phase
Even, the d mouth of the first proportional reversing valve 13 is connected with the rod end chamber of the first boom cylinder 70 and the second boom cylinder 71, the first ratio
E mouth of example reversal valve 13 by the first swing arm lock-up valve 18 and meanwhile with the A mouth of the 4th two-bit triplet solenoid directional control valve 48, the 5th liang
The A mouth of position three-way solenoid valve 49 is connected, and A mouth, the 5th two-bit triplet electromagnetism of third two-bit triplet solenoid directional control valve 47 change
Through solenoid-operated proportional flow valve 40, the second two-bit triplet solenoid directional control valve 42 and the storage by being sequentially connected in series after to the B mouth parallel connection of valve 49
Energy device 42 is connected, and the C mouth of the 4th two-bit triplet solenoid directional control valve 48 passes through third swing arm lock-up valve 53 and the second boom cylinder 71
Rodless cavity be connected, C mouth of the 5th two-bit triplet solenoid directional control valve 49 is by the second swing arm lock-up valve 52 and the second boom cylinder
71 rodless cavity is connected.
Further, the B mouth of the 4th two-bit triplet solenoid directional control valve 48 is after third two-bit triplet solenoid directional control valve 47
In parallel with the B mouth of the 5th two-bit triplet solenoid directional control valve 49 again, the B mouth of third two-bit triplet solenoid directional control valve 47 is connected to first
The rod end chamber of boom cylinder 70 and the second boom cylinder 71.
Further, the B mouth of third two-bit triplet solenoid directional control valve 47 is connected with the rod end chamber of the second boom cylinder 71
Oil circuit on a first 2/2-way solenoid directional control valve 55 in parallel, the oil outlet of the first 2/2-way solenoid directional control valve 55 passes through
Third check valve 54 is connected with fuel tank.
In order to recycle rotary braking energy, two hydraulic fluid ports of rotary motor 72 respectively with two oil inlets of the second shuttle valve 60
It is connected, the oil outlet of the second shuttle valve 60 is connected in parallel to third two-bit triplet electromagnetic switch by the second 2/2-way solenoid directional control valve 62
On the oil circuit that the A mouth of valve 47 is connected with solenoid-operated proportional flow valve.
Further, the oil outlet of the second variable pump 11 is divided into two-way after second one-way valve 30, compares respectively with second
The a mouth of example reversal valve 14 is connected with b mouthfuls, and the c mouth of the second proportional reversing valve 14 is connected with fuel tank, the d of the second proportional reversing valve 14
Mouthful be connected simultaneously with a mouth of interflow reversal valve 15, b mouthfuls, the e mouth of the second proportional reversing valve 14 and f mouthfuls respectively with rotary motor 72
Two hydraulic fluid ports be connected, collaborate reversal valve 15 c mouth, d mouthful be connected with fuel tank, collaborate reversal valve 15 e mouth pass through the 4th list
It is connected to valve 20 with the A mouth of the second overload oil compensating valve 17, the first swing arm lock-up valve 18, the 5th two-bit triplet solenoid directional control valve 49,
First overload oil compensating valve 16 is connected in parallel on the d mouth of the first proportional reversing valve 13, then with the first boom cylinder 70 and the second boom cylinder
71 rod end chambers are connected.
Specifically, being set on the oil circuit that the first pilot control valve 21 is connected with the A mouth of the second two-bit triplet solenoid directional control valve 46
There are first pressure sensor 25, the oil circuit that the second pilot control valve 22 is connected with the A mouth of the first two-bit triplet solenoid directional control valve 45
It is equipped with second pressure sensor 26,24 two control ports of third pilot control valve 23 and the 4th pilot control valve are respectively with the
Two oil inlets of one shuttle valve 27 are connected, and the oil outlet of the first shuttle valve 27 is equipped with third pressure sensor 28, accumulator 41 with
The connected oil circuit of second two-bit triplet solenoid directional control valve 42 is equipped with the 4th pressure sensor 43,60 oil outlet of the second shuttle valve and the
The oil circuit being connected between two 2/2-way solenoid directional control valves 62 is equipped with the 5th pressure sensor 61, and the first boom cylinder 70 is without bar
The oil circuit that chamber is connected with the second swing arm lock-up valve 52 is equipped with the 6th pressure sensor 56,71 rodless cavity of the second boom cylinder and the
The connected oil circuit of three swing arm lock-up valves 53 is equipped with the 7th pressure sensor 57.
Shut-off valve 44 is installed on the oil circuit that accumulator 41 is connected with fuel tank.
Specific work process is as follows:
When energy saver does not cut system work, the electromagnet of all solenoid valves must not electricity in energy saver.
Swing arm uphill process:
Pulling control crank makes the first pilot control valve 21 output control oil, by the second two-bit triplet solenoid directional control valve 46
Control signal xBm1A so that the first proportional reversing valve 13 is commutated to right position, the high pressure oil of the first variable pump 10 output is single through first
To 29 and first ratio commutation 13 enter the first swing arm lock-up valves 18, open 18 spool of the first swing arm lock-up valve, oil liquid is from first
Swing arm lock-up valve 18 flows out；Control signal xBm2A makes interflow reversal valve 15 commutate to right position, the high pressure of the second variable pump 11 output
Oil collaborates through second one-way valve 30, interflow reversal valve 15 and the 4th check valve 20 with the oil liquid of the first swing arm lock-up valve 18 outflow,
Enter the 4th two-bit triplet solenoid directional control valve 48 and the 5th two-bit triplet solenoid directional control valve 49 simultaneously, then enters back into the second swing arm
Lock-up valve 52 and third swing arm lock-up valve 53, finally enter the rodless cavity of the first boom cylinder 70 and the second boom cylinder 71, move
Arm cylinder piston rod stretches out, and swing arm rises；The oil liquid of 71 rod end chamber of first boom cylinder 70 and the second boom cylinder is through first
Proportional reversing valve 13 flows back to fuel tank.
Swing arm declines process:
Pulling control crank makes the second pilot control valve 22 output control oil, through the first two-bit triplet solenoid directional control valve 45
Control signal xBm1B makes the first proportional reversing valve 13 commutate to left position, and the high pressure oil of the first variable pump 10 output is unidirectional through first
Valve 29 and the first proportional reversing valve 13 enter the rod end chamber of the first boom cylinder 70 and the second boom cylinder 71, and boom cylinder is living
The decline of stopper rod retraction swing arm；It controls signal xBm1B and also enters the first pilot operated directional control valve 19 simultaneously, control signal xBmB enters simultaneously
51 control terminal of second pilot operated directional control valve 50 and third pilot operated directional control valve, makes these three valves commutate, the first swing arm lock-up valve 18,
The control terminal of two swing arm lock-up valves 52 and third swing arm lock-up valve 53 passes through the first pilot operated directional control valve 19, the second liquid controlled reversing respectively
Valve 50 and third pilot operated directional control valve 51 are communicated with fuel tank, keep the first swing arm lock-up valve 18, the second swing arm lock-up valve 52 and third dynamic
The oil liquid of the plunger shaft of 53 reverse-conducting of arm lock-up valve, the first boom cylinder 70 and the second boom cylinder 71 is successively locked through swing arm
The second swing arm of valve lock-up valve 52 and third swing arm lock-up valve 53, the 5th two-bit triplet solenoid directional control valve 49 and the 4th two-bit triplet electricity
Magnetic reversal valve 48, then fuel tank is flowed back to by the first swing arm lock-up valve 18, the first proportional reversing valve 13.
Revolution and braking process:
The electromagnet of the first 2/2-way solenoid directional control valve 55 must not be electric when this operating condition, third pilot control valve 23 or the 4th
24 output pressure of pilot control valve controls signal xSwA or xSwB, and the second proportional reversing valve 14 is made to commutate, and drives rotary motor 72
Rotation；When third pilot control valve 23 or the 4th pilot control valve 24 do not control signal xSwA or xSwB output, the second ratio
Reversal valve 14 returns to middle position, has cut off the inlet and outlet of fuel channel of rotary motor 72, and because inertia continues to rotate, rotary motor 72 goes out excavator
Mouth pressure rise opens internal overflow valve overflow and generates heat, and 72 import of rotary motor vacuum occurs and passes through internal one-way valve
From fuel tank repairing.
Various operating conditions when energy saver work:
When energy saver incision system work, the first two-bit triplet solenoid directional control valve 45 in energy saver, the second two
46 electromagnet of three-way solenoid valve obtain it is electric, control signal xBm1A, xBm2A and xBm1B communicated with fuel tank pressure be 0, first elder generation
The control pressure signal for leading control valve 21 and the output of the second pilot control valve 22 is input to controller for controlling energy saver, saves
The 4th two-bit triplet solenoid directional control valve 48,49 electromagnet of the 5th two-bit triplet solenoid directional control valve obtain electric in energy device, to cut off
The channel of swing arm cavity of resorption and original hydraulic system.
Movable arm potential energy removal process:
Under this operating condition, in energy saver in addition to the electromagnet of the first 2/2-way solenoid directional control valve 62 must not electricity other than, it is other
The electromagnet of solenoid valve all it is electric.Second pilot control valve, 22 output pressure controls signal xBmB, this signal makes in energy saver
The second pilot operated directional control valve 50 and third pilot operated directional control valve 51 commutate, the second swing arm lock-up valve 52 and third swing arm lock-up valve 53 are controlled
End processed is communicated by the second pilot operated directional control valve 50 and third pilot operated directional control valve 51 with fuel tank, and the second swing arm lock-up valve 52 and third are dynamic
53 reverse-conducting of arm lock-up valve；The equivalent hydraulic system of energy saver is as shown in Figure 3 at this time.
Second boom cylinder, 71 rodless cavity is communicated with the rod end chamber of the first boom cylinder 70 and the second boom cylinder 71, is moved
Flow regeneration may be implemented in arm when declining；If boom cylinder piston cavity area is twice of rod end chamber area, the second swing arm
Flow needed for the flow that oil cylinder 71 is discharged is exactly equal to two cylinder piston rods；If boom cylinder rodless cavity area is greater than piston
Twice of rod cavity area, the flow that boom cylinder 71 is discharged pass through third list more than the part of flow needed for two cylinder piston rods
Fuel tank is flow back to valve 54；If boom cylinder rodless cavity area is less than twice of rod end chamber area, rod end chamber generates vacuum,
First overload oil compensating valve 16 just gives the repairing of boom cylinder rod end chamber.The gravity of swing arm and material is in 71 piston of the second boom cylinder
Generate high pressure in chamber, the 6th pressure sensor 56 of 70 rodless cavity of the first boom cylinder of controller synthesis is connected with accumulator 41
26 signal of second pressure sensor of 22 equipped at outlet port of 4th pressure sensor 43 and the second pilot control valve, with intelligent control
Algorithm output signal controls the amount of opening of solenoid-operated proportional flow valve 40, keeps swing arm decrease speed identical when working with original system, no
The maneuverability of influence system, the flow that proportional flow control valve 40 exports give accumulator 41 filling liquid, the hydraulic energy that swing arm decline is generated
It is stored in accumulator.
Rotary braking kinetic energy removal process:
Under this operating condition, first third pilot control valve 23 or 24 output pressure of the 4th pilot control valve control signal xSwA or
XSwB, control the second proportional reversing valve 14 commutation, driving rotary motor 72 rotates, when controller detects the control of rotary motor 72
For signal xSwA or xSwB processed by having to without disappearing into after on-position, controller, which issues control signal, keeps the second two-bit triplet electric
Magnetic reversal valve 42 and 62 electromagnet of the second 2/2-way solenoid directional control valve obtain it is electric, at this time the equivalent hydraulic system of energy saver as scheme
Shown in 5, the hydraulic oil that rotary motor 72 exports enters solenoid-operated proportional flow valve 40, controller synthesis revolution by the second shuttle valve 60
72 exit of motor the 5th pressure sensor 61,43 signal of the 4th pressure sensor that is connected with accumulator 41, with intelligent control
The amount of opening of algorithm output signal control solenoid-operated proportional flow valve 40 processed, the characteristic for braking rotary motor 72 and original system work
Shi Xiangtong, does not influence the maneuverability of system, and the flow that proportional flow control valve 40 exports gives accumulator 41 filling liquid, rotary kinetic energy is converted
Hydraulic energy be stored in accumulator.
Swing arm, which rises liquid, can discharge recycling process:
When the pressure of accumulator 41 is higher than certain value, the high-voltage oil liquid stored in accumulator 41 can be completed on a swing arm
When volume needed for rising, it is electric that controller obtains 46 electromagnet of the second two-bit triplet solenoid directional control valve, and cutting flows to the commutation of the first ratio
Control the signal xBm1A and xBm2A of valve 13 and converging valve 15, when the controller detects that the manipulation hand of the first pilot control valve 21
Handle, which is pulled, outputs xBmA control signal, and controller, which issues, controls signal, in addition to the first 2/2-way electromagnetism changes in energy saver
To the electromagnet of valve 62 and third two-bit triplet solenoid directional control valve 47 must not electricity outside, the electromagnet of other solenoid valves all it is electric, this
When energy saver equivalent hydraulic system as shown in figure 4, the 6th pressure sensing of 70 plunger shaft of the first boom cylinder of controller synthesis
The first pressure sensing of device 56,21 equipped at outlet port of the 4th pressure sensor 43 and the first pilot control valve being connected with accumulator 41
25 signal of device, with the amount of opening of intelligent control algorithm output signal control solenoid-operated proportional flow valve 40, proportional flow control valve 40 will
High-voltage oil liquid in accumulator 41 is transported to 71 rodless cavity of the first boom cylinder 70 and the second boom cylinder, makes the swing arm rate of climb
It is identical when working with original system, the maneuverability of system is not influenced.The release of this operating condition recycles the hydraulic energy of recycling, and swing arm rises not
The fuel oil of consumption of engine, to achieve the purpose that energy saving fuel-efficient.General swing arm decline twice or rotary braking twice, recycling
Hydraulic energy can supply swing arm rise it is primary.
In conclusion the hydraulic energy that energy saver of the invention can convert gravitional force during descending movable arm of excavator
It stores with the hydraulic energy of kinetic energy conversion when rotary braking into accumulator 41, and excavator maneuverability and swing arm can not influenced
Under the premise of kinetic stability, the energy stored in accumulator 41 release is used for excavator swing arm lifting operating condition, avoids original
The restriction loss that is generated through hydraulic valve of oil liquid and motor outlet high pressure oil produces when rotary braking when swing arm declines in hydraulic system
Raw spill losses improves the efficiency of hydraulic system.
Specific control system working principle is as follows:
Fig. 2 is control system hardware composition, and first pressure sensor 25 and second pressure sensor 26 detect swing arm respectively
The output signal xBmA and xBmB of raising and lowering pilot control valve, third pressure sensor 28 are used to detect left and right revolution guide
The output signal xSwA or xSwB of the output signal swing arm raising and lowering pilot control valve of control valve, these three pressure sensors
It is to be configured in original hydraulic system, these three pressure signals are sent into controller after signal condition and carry out A/D conversion, controller
By these three pressure values, whether there is or not the movements that excavator is judged with size and control speed；6th pressure sensor 56 and the 7th pressure
Force snesor 57 detects the pressure in two boom cylinder rodless cavities respectively, and the 4th pressure sensor 43 detects the pressure of accumulator 41
Power, the 5th pressure sensor 61 detect the pressure of 72 oil outlet of rotary motor, this four pressure sensors are to belong to energy saver
, controller judges the current working of excavator by this four pressure values.Controller is sent out according to the operation of excavator and operating condition
DO signal out, and so that corresponding solenoid valve is commutated after amplifying by relay driving plate, the oil liquid of hydraulic system is imported and is required
Oil circuit, realize the recycling and reuse of hydraulic energy.Each pressure sensor and pilot control valve output in controller synthesis system
Signal, with intelligent control algorithm output signal control solenoid-operated proportional flow valve 40 amount of opening, realize to swing arm rise or
The control of decrease speed, or the control to motor brake port pressure keep its movenent performance identical when working with original system, do not influence
The maneuverability of system.
Claims (10)
1. the energy saver of a kind of excavator swing arm single cylinder pressure-bearing energy regenerating and recycling, which is characterized in that this energy saver
It is mounted in original hydraulic system with separate modular, original hydraulic system includes that pilot control valve group, proportional reversing valve group and first are dynamic
Arm lock-up valve and the first pilot operated directional control valve, energy saver include controller, two-bit triplet electromagnetic switch valve group, 2/2-way electromagnetism
Commutate valve group, proportional flow control valve, accumulator and several pressure sensors；During swing arm decline, controller is controlled by guide
Electromagnetic switch valve group in valve group control proportional reversing valve group processed and energy saver makes a boom cylinder pressure-bearing recycling hydraulic energy,
Another boom cylinder rodless cavity oil liquid is communicated with the epicoele of two oil cylinders realizes flow regeneration；Excavator revolution terminates to enter overflow
When damped condition, controller issues control signal and switches corresponding solenoid directional control valve, and the high pressure oil that rotary motor exports is introduced into
Proportional flow control valve, the hydraulic energy that rotary braking kinetic energy is converted are stored in accumulator；Controller is adopted by the pressure sensor being arranged
Collect corresponding position pressure signal, the amount of opening and the commutation of each solenoid directional control valve for issuing control Signal Regulation ratio flow valve realize oil
The recycling and release process of liquid, keep the maneuverability of excavator identical as original system work.
2. the energy saver of Hydraulic Excavator's Boom single cylinder pressure-bearing energy regenerating according to claim 1 and recycling,
It is characterized in that, pilot control valve group includes the first pilot control valve (21), the second pilot control valve (22), third pilot control valve
(23), the 4th pilot control valve (24), the control signal xBmA and the second two-bit triplet electricity of the first pilot control valve (21) output
The A mouth of magnetic reversal valve (46) is connected；Second pilot control valve (22) output control signal xBmB simultaneously with the first two-bit triplet
The A mouth of solenoid directional control valve (45), the second pilot operated directional control valve (50) control terminal for controlling the second swing arm lock-up valve (52), control third
Third pilot operated directional control valve (51) control terminal of swing arm lock-up valve (53) is connected；The control signal of third pilot control valve (23) output
XSwA and the 4th pilot control valve (24) output control signal xSwB respectively with the second proportional reversing valve in original hydraulic system
(14) two control port signals are connected.
3. the energy saver of excavator swing arm single cylinder pressure-bearing energy regenerating according to claim 2 and recycling, feature
It is, the B mouth of the second two-bit triplet solenoid directional control valve (46) and the first B mouthfuls of two-bit triplet solenoid directional control valve (45) while and fuel tank
The C mouth of connection, the first two-bit triplet solenoid directional control valve (45) exports two controls signal xBm1A and xBm2A, the second two-bit triplet
The C mouth of solenoid directional control valve (46) exports a control signal xBm1B, control signal xBm1A and xBm1B respectively with original hydraulic system
In the first proportional reversing valve (13) two control port signals be connected, control signal xBm1B simultaneously with control the first swing arm
The first pilot operated directional control valve (19) control terminal of lock-up valve (18) is connected, and control signal xBm2A is changed with the interflow in former hydraulic control system
It is connected to valve (15) control end signal.
4. the energy saver of excavator swing arm single cylinder pressure-bearing energy regenerating according to claim 3 and recycling, feature
It is, the oil outlet of the first variable pump (10) is connected with the c mouth of the first proportional reversing valve (13) all the way, and another way is single by first
Be connected to valve (29) with the b mouth of the first proportional reversing valve (13), a mouth of the first proportional reversing valve (13), f mouthfuls with fuel tank phase
Even, the d mouth of the first proportional reversing valve (13) is connected with the rod end chamber of the first boom cylinder (70) and the second boom cylinder (71),
The e mouth of first proportional reversing valve (13) by the first swing arm lock-up valve (18) simultaneously with the 4th two-bit triplet solenoid directional control valve (48)
A mouth, the 5th two-bit triplet solenoid directional control valve (49) A mouth be connected, the A mouth of third two-bit triplet solenoid directional control valve (47), the
After the B mouth of five two-bit triplet solenoid directional control valves (49) is in parallel through by being sequentially connected in series solenoid-operated proportional flow valve (40), the second two
Three-way solenoid valve (42) is connected with accumulator (41), and the C mouth of the 4th two-bit triplet solenoid directional control valve (48) is dynamic by third
Arm lock-up valve (53) is connected with the rodless cavity of the second boom cylinder (71), the C mouth warp of the 5th two-bit triplet solenoid directional control valve (49)
The second swing arm lock-up valve (52) is crossed to be connected with the rodless cavity of the first boom cylinder (70).
5. the energy saver of excavator swing arm single cylinder pressure-bearing energy regenerating according to claim 4 and recycling, feature
It is, the B mouth of the 4th two-bit triplet solenoid directional control valve (48) is after third two-bit triplet solenoid directional control valve (47) again with the 5th
The B mouth of two-bit triplet solenoid directional control valve (49) is in parallel, and the B mouth of third two-bit triplet solenoid directional control valve (47) is connected to the first swing arm
The rod end chamber of oil cylinder (70) and the second boom cylinder (71).
6. the energy saver of excavator swing arm single cylinder pressure-bearing energy regenerating according to claim 5 and recycling, feature
It is, on the oil circuit that the B mouth of third two-bit triplet solenoid directional control valve (47) is connected with the rod end chamber of the second boom cylinder (71)
A first 2/2-way solenoid directional control valve (55) in parallel, the oil outlet of the first 2/2-way solenoid directional control valve (55) pass through third
Check valve (54) is connected with fuel tank.
7. the energy saver of excavator swing arm single cylinder pressure-bearing energy regenerating according to claim 6 and recycling, feature
It is, two hydraulic fluid ports of rotary motor (72) are connected with two oil inlets of the second shuttle valve (60) respectively, the second shuttle valve (60)
Oil outlet is connected in parallel to the A mouth and electricity of third two-bit triplet solenoid directional control valve (47) by the second 2/2-way solenoid directional control valve (62)
On the connected oil circuit of magnetic proportional flow control valve (40).
8. the energy saver of excavator swing arm single cylinder pressure-bearing energy regenerating according to claim 7 and recycling, feature
Be that the oil outlet of the second variable pump (11) is divided into two-way after second one-way valve (30), respectively with the second proportional reversing valve
(14) a mouth is connected with b mouthfuls, and the c mouth of the second proportional reversing valve (14) is connected with fuel tank, the d mouth of the second proportional reversing valve (14)
Be connected simultaneously with a mouth at interflow reversal valve (15), b mouthfuls, the e mouth of the second proportional reversing valve (14) and f mouthfuls respectively with rotary motor
(72) two hydraulic fluid ports are connected, collaborate c mouth of reversal valve (15), d mouthful be connected with fuel tank, the e mouth for collaborating reversal valve (15) passes through
Cross the 4th check valve (20) and the second overload oil compensating valve (17), the first swing arm lock-up valve (18), the 5th two-bit triplet electromagnetic switch
The A mouth of valve (49) is connected, and the first overload oil compensating valve (16) is connected in parallel on the d mouth of the first proportional reversing valve (13), then with the first swing arm
Oil cylinder (70) and the second boom cylinder (71) rod end chamber are connected.
9. the energy saver of excavator swing arm single cylinder pressure-bearing energy regenerating according to claim 8 and recycling, feature
It is, the oil circuit that the first pilot control valve (21) is connected with the A mouth of the second two-bit triplet solenoid directional control valve (46) is equipped with first
Pressure sensor (25), the oil circuit that the second pilot control valve (22) is connected with the A mouth of the first two-bit triplet solenoid directional control valve (45)
It is equipped with second pressure sensor (26), (24) two control ports of third pilot control valve (23) and the 4th pilot control valve point
It is not connected with two oil inlets of the first shuttle valve (27), the oil outlet of the first shuttle valve (27) is equipped with third pressure sensor
(28), the oil circuit that accumulator (41) is connected with the second two-bit triplet solenoid directional control valve (42) is equipped with the 4th pressure sensor
(43), the oil circuit being connected between the second shuttle valve (60) oil outlet and the second 2/2-way solenoid directional control valve (62) is equipped with the 5th pressure
Force snesor (61), the oil circuit that the first boom cylinder (70) rodless cavity is connected with the second swing arm lock-up valve (52) are equipped with the 6th pressure
Force snesor (56), the oil circuit that the second boom cylinder (71) rodless cavity is connected with third swing arm lock-up valve (53) are equipped with the 7th pressure
Force snesor (57).
10. the energy saver of excavator swing arm single cylinder pressure-bearing energy regenerating according to claim 9 and recycling, feature
It is, shut-off valve (44) is installed on the oil circuit that accumulator (41) is connected with fuel tank.
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| CN111119271A (en) * | 2019-12-28 | 2020-05-08 | 潍柴动力股份有限公司 | Device and method for improving plateau capacity of excavator based on energy recovery |
| CN111207135A (en) * | 2020-03-03 | 2020-05-29 | 江苏师范大学 | Overflow loss recycling system based on hydraulic energy accumulator and four-cavity hydraulic cylinder |
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| CN112032123A (en) * | 2020-09-18 | 2020-12-04 | 长沙理工大学 | Hydraulic energy-saving large-scale artware rotary table driving device |
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| CN113529842B (en) * | 2021-07-09 | 2022-07-12 | 合肥工业大学 | Excavator movable arm energy recovery system based on pressure variable energy accumulator |
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| CN114855923B (en) * | 2022-05-30 | 2024-03-15 | 柳州柳工挖掘机有限公司 | Rotary kinetic energy recovery device and excavator |
| CN115059128A (en) * | 2022-06-23 | 2022-09-16 | 江苏师范大学 | Lever pressure-regulating energy-saving device for recycling potential energy of movable arm of excavator and control method |
| CN115059128B (en) * | 2022-06-23 | 2024-06-25 | 江苏师范大学 | Lever pressure regulating and energy saving device for recycling potential energy of movable arm of excavator and control method |
| WO2024108543A1 (en) * | 2022-11-25 | 2024-05-30 | 江苏徐工工程机械研究院有限公司 | Energy recovery and reuse system for loader-digger and control method therefor, and loader-digger |
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