CN105714872B - A kind of pressure and the adjustable hydraulic energy recovery of capacity and stocking system and its method of work - Google Patents
A kind of pressure and the adjustable hydraulic energy recovery of capacity and stocking system and its method of work Download PDFInfo
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- CN105714872B CN105714872B CN201410387734.XA CN201410387734A CN105714872B CN 105714872 B CN105714872 B CN 105714872B CN 201410387734 A CN201410387734 A CN 201410387734A CN 105714872 B CN105714872 B CN 105714872B
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Abstract
The invention provides a kind of pressure and the adjustable hydraulic energy recovery of capacity and stocking system, including：Oil cylinder (1), volume adjustable hydraulic pump (2), hydraulic selector network, hydraulic cylinder (6), hydraulic accumulator (7), gas-loaded accumulator (9), three-position three-way valve (20) and two position three-way valve (21)；Wherein, volume adjustable hydraulic pump (2) connection oil cylinder (1), output end connection hydraulic selector network；Hydraulic selector network connects with hydraulic accumulator (7)；Hydraulic accumulator (7) is inflatable hydraulic tank, has lower hydraulic chamber and top compression air chamber；The compressed air cell of hydraulic accumulator (7) connects by three-position three-way valve (20) with gas-loaded accumulator (9)；Hydraulic cylinder (6) and hydraulic selector network-in-dialing.The energy recovery unit being made up of hydraulic accumulator (7) and gas-loaded accumulator (9) can realize double parameters regulation of pressure recovery and the capacity that recovers energy, while ensureing system stable operation, recovery and the utilization rate of energy are improved to the full extent, can greatly reduce the consumption and discharge of fuel oil.Present invention also offers based on a kind of above-mentioned pressure and the method for work of the adjustable hydraulic energy recovery of capacity and stocking system.
Description
Technical field
The present invention relates to a kind of pressure and the adjustable hydraulic energy recovery of capacity and stocking system and its method of work.
Background technology
With the continuous growth of oil price and the aggravation increasingly of exhaust emissions effect on environment, energy-saving and emission-reduction have become
The emphasis of research.By the development of more than ten years, application of the Technology of Hybrid Electric Vehicle on passenger vehicle has reached its maturity, various cars
Type emerges in an endless stream.Due to compared to passenger vehicle, engineering truck negligible amounts, thus Saving Energy of Engineering Vehicle emission-reduction technology always not
Obtain the attention of various countries.
Engineering truck is mainly acted using hydraulic-driven executing agency, and hydraulic cylinder needs continually to extend and reclaim, hydraulic pressure
It can mainly be lost with final in other conversion process of energy in the form of heat energy, greatly reduce the combustion of engineering truck
Oily economy.For this problem, some people, which propose, is reclaimed the form of the hydraulic energy transfer of engineering truck into electric energy
Scheme, but reclaim and utilize during need hydraulic energy transfer to be electric energy, electric energy is then converted to hydraulic energy, and energy is each
Lose huge in the conversion process of kind of form, thus fuel economy improves and unobvious.Separately there are some to propose using liquid
Accumulator is pressed to the recoverable scheme of engineering truck hydraulic pressure, but because engineering truck operating condition is complicated and changeable, capacity and pressure
The hydraulic energy recovery system that power is fixed can not realize the abundant recovery of hydraulic energy all the time.
It is therefore desirable on the premise of engineering truck stable operation is ensured, improve hydraulic energy recovery system and its work side
Method, the recovery utilization rate of energy is improved as far as possible, realizes the energy-saving and emission-reduction of engineering truck.
The content of the invention
The purpose of the present invention is precisely in order to realize the abundant recovery of the hydraulic energy of engineering truck, it is proposed that a kind of pressure and appearance
Measure adjustable hydraulic energy recovery system and its method of work.
The present invention provides a kind of pressure and the adjustable hydraulic energy recovery of capacity and stocking system, including：Oil cylinder, variable delivery hydraulic
Pump, hydraulic selector network, hydraulic cylinder, hydraulic accumulator, gas-loaded accumulator, three-position three-way valve and two position three-way valve；Wherein, variable
Hydraulic pump connects oil cylinder, output end connection hydraulic selector network；Hydraulic selector network connects with hydraulic accumulator；Hydraulic accumulator
With lower hydraulic chamber and top compression air chamber；The compressed air cell of hydraulic accumulator passes through three-position three-way valve and energy storage of atmospheric pressure
Device connects；Hydraulic cylinder and hydraulic selector network connection.
Wherein, hydraulic selector network is made up of switch valve one to nine, check valve, two position three-way valve：One end of switch valve one
It is connected with volume adjustable hydraulic pump, one end connection of the other end and check valve, the other end while connecting valve valve five to seven of check valve；
Switch valve five concatenates with switch valve six, and switch valve eight concatenates with switch valve nine, and two concatenate branch roads again and connect, the both ends of switch valve seven
It is connected in the intermediate duct of two concatenation branch roads；One end of switch valve two is connected between switch valve one and check valve, separately
It is connected after one end connection two position three-way valve with the hydraulic cavities of hydraulic accumulator；One end of switch valve four simultaneously connecting valve valve three,
The hydraulic cavities connection of switch valve seven to nine, the other end and hydraulic accumulator；Wherein, check valve and switch valve four are connected to switch valve
Seven different ends.
Wherein, gas-loaded accumulator is gas tank.
Preferably, two position three-way valve be connected respectively with the hydraulic cavities of switch valve four and hydraulic accumulator before pipeline on
Set up another check valve.
Preferably, a pressure-reducing valve one, the pressure-reducing valve are set on pipeline between volume adjustable hydraulic pump and switch valve one
One connects with oil cylinder, by controlling the pressure-reducing valve one, the hydraulic oil in hydraulic selector network can be discharged into oil cylinder, so as to realize
Regulation to oil pressure in hydraulic selector network.
Preferably, the lower hydraulic chamber of hydraulic accumulator connects a pressure-reducing valve two, the pressure-reducing valve two connects with oil cylinder,
By controlling the pressure-reducing valve two, the hydraulic oil in the hydraulic cavities of hydraulic accumulator can be discharged into oil cylinder.
Preferably, an air pressure reducing device, the gas are set on pipeline between gas-loaded accumulator and three-position three-way valve
Pressure-reducing valve and atmosphere are pressed, by controlling the air pressure reducing device, the compressed air in gas-loaded accumulator can be discharged into air, from
And realize and the pressure of gas-loaded accumulator or/and the compressed air cell of hydraulic accumulator is adjusted.
Preferably, hydraulic energy recovery and stocking system also include hydraulic accumulator supercharging device.The supercharging device is liquid
Press pump, the hydraulic pump are connected between switch valve two and two position three-way valve, and its hydraulic oil input connects the right side of two position three-way valve
Position, hydraulic pump can carry out boost operations to the hydraulic oil stored in hydraulic accumulator, when the hydraulic pressure being stored in hydraulic accumulator
When the pressure of oil is relatively low, control two position three-way valve is in right position, and hydraulic oil moves after hydraulic pump pressurizes for driving hydraulic cylinder
Make.The output axis connection that the power intake of hydraulic pump passes through clutch and the dynamoelectric machine of engineering truck.
Preferably, hydraulic energy recovery and stocking system also include gas tank pressue device.The gas tank pressue device is one high
Compression pump, high-pressure pump gas input port and atmosphere, delivery outlet are connected with gas tank, and high-pressure pump can carry out pressurising to gas tank
Operation, makes the pressure of gas tank reach desired operating pressure.The high-pressure pump is driven by the dynamoelectric machine of engineering truck.
Present invention also offers hydraulic energy recovery and the method for work of stocking system：
Engineering vehicle engine, which is controlled, operates in optimal working point.
Engineering vehicle engine drives volume adjustable hydraulic pump by clutch, drives volume adjustable hydraulic pump to reclaim and store up to hydraulic energy
Deposit system provides high pressure liquid force feed, and the mechanical energy of engineering vehicle engine output is converted to the hydraulic pressure of high pressure liquid force feed first
Energy；When the power output of engineering vehicle engine is beyond the required energy of hydraulic cylinder lifting load, a part of hydraulic energy will
It is stored in hydraulic energy recovery and stocking system, now, three-position three-way valve is in middle position, and in closed mode, hydraulic energy is first
It is stored in hydraulic accumulator, when the energy-storage pressure of hydraulic accumulator exceedes the maximum operating pressure of its own, passes through control
Three-position three-way valve processed, left position is at, the compressed air cell of hydraulic accumulator connects with gas-loaded accumulator, by section hydraulic energy
It is stored in a manner of air pressure in gas-loaded accumulator.
For the hydraulic energy in hydraulic cylinder：During hydraulic cylinder load declines, three-position three-way valve is in middle position, in pass
Closed state, the high pressure liquid force feed in hydraulic cylinder can be firstly stored in hydraulic accumulator, when the energy-storage pressure of hydraulic accumulator surpasses
When crossing the maximum operating pressure of its own, by controlling three-position three-way valve, left position, the compressed air of hydraulic accumulator are at
Chamber connects with gas-loaded accumulator, and the partial high pressure gas in hydraulic accumulator is filled into gas-loaded accumulator by three-position three-way valve
In.
When needing to release energy, control three-position three-way valve be in middle position first, the compressed air cell of hydraulic accumulator and
Gas-loaded accumulator disconnects, and hydraulic accumulator releases energy first, when pressure drops to certain given threshold, controls at three-position three-way valve
Yu Zuowei, the compressed air cell of hydraulic accumulator is boosted by gas-loaded accumulator, further discharge and stored up in gas-loaded accumulator
The energy deposited, when the air pressure in gas-loaded accumulator drops to setting limit pressure, whole hydraulic energy storages are closed in control
And the valve of recovery system, gas tank, stop releasing energy from hydraulic energy recovery and stocking system；So circulation.
When the output energy of engineering vehicle engine is less than the energy needed for lifting load, the required energy can be by
Engineering vehicle engine and hydraulic energy recovery and stocking system provide jointly, while improving fuel economy, also greatly enhance
The carrying load ability of system.
The present invention carries out hydraulic energy recovery, pressure and the double parameter regulations of capacity, energy using hydraulic accumulator and gas tank joint
Enough ensure the control of pressure recovery, ensure the speed of hydraulic stem recovery, can reclaim and utilize hydraulic energy to a greater extent.Together
When, recovery capacity can also have a variety of auxiliary adjustment means, ensure the energy of abundant recovery system.In the present invention also creatively
Matrix form hydraulic selector network is employed, realizes the configuration of omnirange oil circuit.
A kind of pressure proposed by the present invention and the adjustable hydraulic energy recovery of capacity and stocking system and its method of work, can
On the premise of ensureing vehicle stabilization operation, the recovery utilization rate of energy is improved as far as possible, improves the fuel economy of vehicle, it is real
The energy-saving and emission-reduction of existing engineering truck.And under the limitation of rated output power, vehicle can the smaller engine of fitted capacity, or
In the case of same installed capacity, there is stronger carrying load ability, neither sacrifice vehicle performance, reduce cost again and make
Use expense.
Brief description of the drawings
Fig. 1 is the general structure schematic diagram of the present invention.
In figure：Oil cylinder 1, volume adjustable hydraulic pump 2, pressure-reducing valve 1, hydraulic pump 4, check valve 1, hydraulic cylinder 6, hydraulic accumulator
(inflatable hydraulic tank) 7, air pressure reducing device 8, gas-loaded accumulator (gas tank) 9, pulsometer 10, switch valve 11-19, three-position three-way valve
20, two position three-way valve 21, pressure-reducing valve 2 22, muffler 23, check valve 2 24.
Embodiment
To make technological means, goal of the invention and the technique effect realized of the present invention it can be readily appreciated that 1 pair of sheet below in conjunction with the accompanying drawings
Invention is described in further detail：
In Fig. 1, pressure of the invention and the adjustable hydraulic energy recovery of capacity and stocking system include：Oil cylinder 1, variable delivery hydraulic
Pump 2, hydraulic selector network, hydraulic cylinder 6, hydraulic accumulator 7, gas-loaded accumulator 9, three-position three-way valve 20 and two position three-way valve 21.
Wherein, volume adjustable hydraulic pump 2 connects oil cylinder 1, output end connection hydraulic selector network.Hydraulic selector network connects with hydraulic accumulator 7
It is logical.Hydraulic accumulator 7 is inflatable hydraulic tank, has lower hydraulic chamber and top compression air chamber.The compression of hydraulic accumulator 7
Air chamber connects by three-position three-way valve 20 with gas-loaded accumulator 9.Hydraulic cylinder 6 and hydraulic selector network connection.
Wherein, hydraulic selector network is made up of the 11-19 of switch valve one to nine, check valve 5, two position three-way valve 21.Wherein, open
The one end for closing valve 1 is connected with volume adjustable hydraulic pump 2, and the other end is connected with one end of check valve 1, and the other end of check valve 5 is same
When connecting valve valve five to seven 15-17, the 15-19 of switch valve five to nine composition bridge line (i.e. switch valve 5 15 and switch valve six
16 concatenations, switch valve 8 18 concatenate with switch valve 9 19, and two concatenate branch roads again and connect, and then the both ends of switch valve 7 17 connect respectively
It is connected in the intermediate duct of two concatenation branch roads)；The one end of switch valve 2 12 is connected between switch valve 1 and check valve 1, separately
It is connected after one end connection two position three-way valve 21 with the hydraulic cavities of hydraulic accumulator 7；The one end of switch valve 4 14 while connecting valve valve
3 13, the 17-19 of switch valve seven to nine, the other end are connected with the hydraulic cavities of hydraulic accumulator 7；Wherein, check valve 1 and switch valve
4 14 are connected to the different ends of switch valve 7 17.Wherein, two position three-way valve 21 respectively with switch valve 4 14 and hydraulic accumulator 7
Another check valve can be set up between hydraulic cavities.
A hydraulic pump 4 can be set up in the adjustable hydraulic energy recovery of pressure and capacity of the present invention and stocking system.The liquid
Press pump 4 is connected between switch valve 2 12 and two position three-way valve 21, and its hydraulic oil input connects the right position of two position three-way valve 21.
For the hydraulic pump 4 by the output axis connection of the dynamoelectric machine of clutch and engineering truck (not marked in figure), hydraulic pump 4 can
Boost operations are carried out to the hydraulic oil stored in hydraulic accumulator, when the hydraulic fluid pressure being stored in hydraulic accumulator 7 is relatively low
When, control two position three-way valve 21 is in right position, and hydraulic oil acts after the pressurization of hydraulic pump 4 for driving hydraulic cylinder 6.
Furthermore, it is possible to set a pressure-reducing valve 1 on pipeline between volume adjustable hydraulic pump 2 and switch valve 1, this subtracts
Pressure valve 1 connects with oil cylinder 1, by controlling the pressure-reducing valve 1, the high pressure liquid force feed in hydraulic selector network can be discharged into oil cylinder
In 1, so as to realize the regulation to oil pressure in hydraulic selector network, as one of supplementary means to pressure and volume adjustment.
In addition, the lower hydraulic chamber of hydraulic accumulator 7 connects a pressure-reducing valve 2 22, the pressure-reducing valve 2 22 connects with oil cylinder 1
It is logical, by controlling the pressure-reducing valve 2 22, the hydraulic oil in the hydraulic cavities of hydraulic accumulator 7 can be discharged into oil cylinder 1, turned into pressure
And one of supplementary means of volume adjustment.
In addition, an air pressure reducing device 8, the gas are set on pipeline between gas-loaded accumulator 9 and three-position three-way valve 20
Pressure-reducing valve 8 and atmosphere are pressed, by controlling the air pressure reducing device 8, the compressed air in gas-loaded accumulator 9 can be discharged into greatly
Gas, so as to realize that the pressure of the compressed air cell to gas-loaded accumulator 9 or/and hydraulic accumulator 7 is adjusted.Gas-loaded accumulator 9 is
Gas tank.
As one of supplementary means to pressure and volume adjustment, gas-loaded accumulator 9 can set up a high-pressure pump 10.It is high
The gas input port of compression pump 10 and atmosphere, delivery outlet are connected with gas tank, and high-pressure pump 10 can carry out pressurising operation to gas tank,
The pressure of gas tank is set to reach desired operating pressure.The high-pressure pump 10 (is not shown by the dynamoelectric machine of engineering truck in figure
Go out) driving.
The pressure to the present invention and the operation principle of the adjustable hydraulic energy recovery of capacity and stocking system are introduced below.
The hydraulic cavities of hydraulic cylinder 6 are attempted by foregoing bridge line.The cylinder piston of hydraulic cylinder 6 and driven-mechanism phase
Connect, the lifting platform of such as lift, the swing arm of excavator or dipper, by hydraulic oil in the cylinder piston uphill process of hydraulic cylinder 6
Driving elevates load, and the gravitional force during dropping under a load is then stored in hydraulic accumulator by the form of hydraulic energy
7 or/and gas-loaded accumulator 9 in.
Hydraulic oil is after check valve 5, it is necessary to carry out oil circuit configuration by hydraulic valve bank.The 11-19 of switch valve one to nine, two
Position three-way valve 21 and three-position three-way valve 20 constitute hydraulic selector network and baroswitch loop, and the on off state of different valves is realized
Different hydraulic/pneumatic energy flow directions, by controlling the logic switch state of different valves, flexibly matching somebody with somebody for oil circuit/gas circuit can be achieved
Put.According to Fig. 1, main operating condition is analyzed as follows：
Operating mode 1：The output hydraulic pressure of volume adjustable hydraulic pump 2 oil, controlling switch valve 1, switch valve 6 16, switch valve 8 18, switch
3 13 right position of valve, remaining switch valve are turned off, and the Rodless hydraulic intracavitary of hydraulic cylinder 6 is oil-filled, and hydraulic cylinder 6 extends, and work can be achieved
Lifting of journey vehicle etc. operates.
Operating mode 2：(during right position, connection hydraulic pump 4 is right for 2 12 right position of controlling switch valve, 21 left position of two position three-way valve or right position
Hydraulic oil in accumulator exports after being pressurizeed), switch valve 6 16, switch valve 8 18,3 13 right position of switch valve, remaining is opened
Close valve to be turned off, the Rodless hydraulic chamber of hydraulic cylinder 6 is oil-filled, and hydraulic cylinder 6 extends.
Operating mode 3：One 11 right position of switch valve, the output hydraulic pressure of volume adjustable hydraulic pump 2 oil, switch valve 5 15, switch valve 4 14, switch
9 19 right position of valve, remaining switch valve are turned off, and the rodless cavity oil extraction of hydraulic cylinder 6, hydraulic cylinder 6 shortens, the accumulation of energy of hydraulic accumulator 7,
Potential energy during the piston decline of hydraulic cylinder 6 is reclaimed, and stored in the form of hydraulic energy.
Operating mode 4：Switch valve is turned off, 20 left position of three-position three-way valve or right position, can adjust the back pressure of hydraulic accumulator 7 (i.e.
The air pressure of the top compression air chamber of hydraulic accumulator 7), so as to realize that the pressure of hydraulic energy recovery system and capacity are adjustable.When
During three-position three-way valve 20 left, gas-loaded accumulator 9 connects with the compressed air cell of hydraulic accumulator 7, can be to hydraulic accumulator
Back pressure is adjusted：If the pressure of the compressed air cell of hydraulic accumulator 7 is less than the pressure of gas-loaded accumulator 9, gas-loaded accumulator 9
The energy of middle storage will be returned in hydraulic accumulator 7, the back pressure rise of hydraulic accumulator 7；If the compression of hydraulic accumulator 7 is empty
The pressure of air cavity is higher than the pressure of gas-loaded accumulator 9, and pressurising operation, the storage of partially recycled energy can be carried out to gas-loaded accumulator 9
Exist in gas-loaded accumulator 9.When 20 middle position of three-position three-way valve, the compressed air cell and gas-loaded accumulator 9 of hydraulic accumulator 7 are disconnected
Open.When three-position three-way valve 20 right, the air in the compressed air cell of hydraulic accumulator 7 can be discharged by muffler 23, real
The decompression operation of the existing compressed air cell of hydraulic accumulator 7, and to the pressure of hydraulic accumulator 7 and a kind of regulating measure of capacity.
Operating mode 5：One 11 right position of switch valve, switch valve 7 17,4 14 right position of switch valve, remaining switch valve are turned off, car
Hydraulic energy caused by engine (not shown) driving volume adjustable hydraulic pump 2 can be directly stored in hydraulic accumulator 7.
In order to preferably reclaim and using hydraulic energy, improve the efficiency of whole system, above-mentioned operating mode is combined or individually deposits
.
It is the description to the adjustable hydraulic energy recovery of pressure and capacity of the present invention and the method for work of stocking system below.
According to Fig. 1, in engineering truck running, with fuel-economizing or to reduce discharge etc. be Con trolling index by vehicle motor
(not shown) control operates in desired optimal working point, and vehicle motor is driven by clutch (not shown) to be become
Hydraulic pump 2 is measured, drives volume adjustable hydraulic pump 2 to be reclaimed to hydraulic energy and stocking system provides high pressure liquid and pressed oil, vehicle motor output
Mechanical energy be converted to first the high pressure liquid force feed hydraulic energy.When engine output has exceeded the energy needed for lifting load
During amount, a part of hydraulic energy will be stored in hydraulic energy recovery and stocking system.Now, three-position three-way valve 20 is in middle position,
In closed mode, hydraulic energy is stored in hydraulic accumulator 7 first, when the energy-storage pressure of hydraulic accumulator 7 exceedes its maximum
During operating pressure, by controlling three-position three-way valve 20, left position is at, compressed air cell and the air pressure of hydraulic accumulator 7 store
Energy device 9 is connected, and section hydraulic can be stored in gas-loaded accumulator 9 in a manner of air pressure, so as to the accumulation of the energy of increasing
Amount, guarantee recover energy to the full extent.
It can also be stored for the hydraulic energy in hydraulic cylinder 6 by same mode：During hydraulic cylinder 6 declines, three
Position three-way valve 20 is in middle position, and in closed mode, the high pressure liquid force feed of hydraulic cylinder rodless cavity can be firstly stored in hydraulic accumulator 7
In.When the energy-storage pressure of hydraulic accumulator 7 exceedes the maximum operating pressure of its own, by controlling three-position three-way valve 20, make
It is in left position, and the compressed air cell of hydraulic accumulator 7 connects with gas-loaded accumulator 9, and the gases at high pressure in hydraulic accumulator 7 lead to
The part of three-position three-way valve 20 is crossed to be filled into gas tank.
When the output energy of vehicle motor is less than the energy needed for lifting load, the required energy is sent out by vehicle
Motivation and hydraulic energy recovery and stocking system provide jointly.Now, control three-position three-way valve 20 is in middle position, hydraulic accumulator 7
Compressed air cell disconnected with gas-loaded accumulator 9, hydraulic accumulator 7 releases energy first；When pressure drops to certain given threshold,
Control three-position three-way valve 20 is in left position, and the compressed air cell of hydraulic accumulator 7 is boosted by gas-loaded accumulator 9, enters one
The energy stored in step release gas-loaded accumulator 9, when the air pressure in gas-loaded accumulator 9 drops to setting limit pressure,
Whole hydraulic pressure and air pressure valve are closed in control, stop releasing energy from hydraulic energy recovery and stocking system.So circulation, recovery and
Using hydraulic energy, the fuel economy of whole system is improved.
Describe oil cylinder involved in the present invention and refer both to oil cylinder 1.
The storing mode of hydraulic energy is versatile and flexible in the present invention, can directly save as hydraulic energy, or further store
For air pressure, conceptual design realizes the pressure store and adjustable volume of hydraulic energy, increases the efficiency of energy regenerating.
The description to embodiment the invention is not restricted to more than, those skilled in the art according to disclosure of the present invention,
Need not pass through the creative work improvement and modification that be carried out on the basis of the present invention, for example, hydraulic tank, air pressure tank, supercharging device and
Selection setting of pressure relief device etc., all should be within protection scope of the present invention.
Claims (9)
1. a kind of pressure and the adjustable hydraulic energy recovery of capacity and stocking system, it is characterised in that including：Oil cylinder (1), variable liquid
Press pump (2), hydraulic selector network, hydraulic cylinder (6), hydraulic accumulator (7), gas-loaded accumulator (9), three-position three-way valve (20) and two
Position three-way valve (21)；Wherein, the hydraulic oil input of the volume adjustable hydraulic pump (2) connects the oil cylinder (1), output end connection institute
State hydraulic selector network；The hydraulic selector network connects with the hydraulic accumulator (7)；The hydraulic accumulator (7) has
Lower hydraulic chamber and top compression air chamber；The compressed air cell of the hydraulic accumulator (7) passes through the three-position three-way valve
(20) connected with the gas-loaded accumulator (9)；
The hydraulic selector network is made up of (21) switch valve one to nine (11-19), check valve one (5), two position three-way valve：It is described
One end of switch valve one (11) is connected with the volume adjustable hydraulic pump (2), and the other end is connected with one end of the check valve one (5),
The other end of the check valve one (5) connects the switch valve five to seven (15-17) simultaneously；(the 15- of switch valve five to nine
19) bridge line is formed, i.e., described switch valve five (15) concatenates with the switch valve six (16), the switch valve eight (18) and institute
State switch valve nine (19) concatenation, the two concatenations branch road again and connects, the both ends of the switch valve seven (17) be connected to this two
In the intermediate duct for concatenating branch road；The hydraulic cavities of the hydraulic cylinder (6) are attempted by the bridge line；The switch valve two
(12) one end is connected between the switch valve one (11) and the check valve one (5), and the other end connects the two-position three way
Hydraulic cavities of the valve (21) afterwards with the hydraulic accumulator (7) are connected；Opened connect simultaneously described in one end of the switch valve four (14)
Valve three (13), the switch valve seven to nine (17-19) are closed, the other end is connected with the hydraulic cavities of the hydraulic accumulator (7)；Its
In, the check valve one (5) and the switch valve four (14) are connected to the different ends of the switch valve seven (17).
2. a kind of pressure according to claim 1 and the adjustable hydraulic energy recovery of capacity and stocking system, it is characterised in that
Wherein, the gas-loaded accumulator (9) is gas tank.
3. a kind of pressure according to claim 1 and the adjustable hydraulic energy recovery of capacity and stocking system, it is characterised in that
Pipe before the two position three-way valve (21) is connected with the hydraulic cavities of the switch valve four (14) and the hydraulic accumulator (7)
Lu Shang, set up another check valve.
4. a kind of pressure according to claim 1 and the adjustable hydraulic energy recovery of capacity and stocking system, it is characterised in that
One pressure-reducing valve one (3), the decompression are set on the pipeline between the volume adjustable hydraulic pump (2) and the switch valve one (11)
Valve one (3) connects with the oil cylinder (1), can be by the hydraulic oil in the hydraulic selector network by controlling the pressure-reducing valve one (3)
It is discharged into the oil cylinder (1), so as to realize the regulation to oil pressure in hydraulic selector network.
5. a kind of pressure according to claim 1 and the adjustable hydraulic energy recovery of capacity and stocking system, it is characterised in that
The lower hydraulic chamber of the hydraulic accumulator (7) connects a pressure-reducing valve two (22), the pressure-reducing valve two (22) and the oil cylinder
(1) connect, by controlling the pressure-reducing valve two (22), the hydraulic oil in the hydraulic cavities of the hydraulic accumulator (7) can be discharged into institute
State in oil cylinder (1).
6. a kind of pressure according to claim 1 and the adjustable hydraulic energy recovery of capacity and stocking system, it is characterised in that
One air pressure reducing device (8) is set on the pipeline between the gas-loaded accumulator (9) and the three-position three-way valve (20), it is described
Air pressure reducing device (8) and atmosphere, can be by the compression in the gas-loaded accumulator (9) by controlling the air pressure reducing device (8)
Air is discharged into air, so as to realize to the compressed air cell of the gas-loaded accumulator (9) or/and the hydraulic accumulator (7)
Pressure is adjusted.
7. a kind of pressure according to claim 1 and the adjustable hydraulic energy recovery of capacity and stocking system, it is characterised in that
Hydraulic energy recovery and stocking system also include hydraulic accumulator supercharging device, and the supercharging device is hydraulic pump (4), the liquid
Press pump (4) is connected between the switch valve two (12) and the two position three-way valve (21), and the hydraulic oil of the hydraulic pump (4) is defeated
Enter the right position that end connects the two position three-way valve (21), the hydraulic pump (4) can be in the hydraulic cavities of the hydraulic accumulator (7)
The hydraulic oil of storage carries out boost operations, when the hydraulic oil in the hydraulic cavities for being stored in the hydraulic accumulator (7) pressure compared with
When low, the two position three-way valve (21) is controlled to be in right position, hydraulic oil is described for driving after the hydraulic pump (4) pressurization
Hydraulic cylinder (6) acts.
8. a kind of pressure according to claim 2 and the adjustable hydraulic energy recovery of capacity and stocking system, the hydraulic energy
Recovery and stocking system also include gas tank pressue device, and the gas tank pressue device is a high-pressure pump (10), the high pressure gas
The gas input port and atmosphere of pump (10), gas delivery port are connected with gas tank.
9. a kind of a kind of adjustable hydraulic energy recovery of pressure and capacity based on described in claim any one of 1-8 and stocking system
Method of work, hydraulic energy recovery and stocking system are applied to engineering truck, it is characterised in that：
Engineering vehicle engine control is operated in into optimal working point；
Engineering vehicle engine drives the volume adjustable hydraulic pump (2) by clutch, drives the volume adjustable hydraulic pump (2) to described
Hydraulic energy reclaims and stocking system provides high pressure liquid force feed, and the mechanical energy of engineering vehicle engine output is converted to the high pressure first
The hydraulic energy of hydraulic oil；
When the power output of engineering vehicle engine is beyond the required energy of the hydraulic cylinder (6) lifting load, a part
Hydraulic energy is stored in the hydraulic energy recovery and stocking system, and now, the three-position three-way valve (20) is in middle position, in pass
Closed state, hydraulic energy are stored in the hydraulic accumulator (7) first, when the energy-storage pressure of the hydraulic accumulator (7) surpasses
When crossing the maximum operating pressure of its own, by controlling the three-position three-way valve (20) to be in left position, the hydraulic accumulator (7)
Compressed air cell connected with the gas-loaded accumulator (9), section hydraulic can be stored in the air pressure in a manner of air pressure
In accumulator (9)；
For the hydraulic energy in hydraulic cylinder (6)：During hydraulic cylinder (6) load declines, during three-position three-way valve (20) is in
Position, in closed mode, the high pressure liquid force feed in hydraulic cylinder (6) can be firstly stored in hydraulic accumulator (7), work as hydraulic accumulator
(7) when energy-storage pressure exceedes the maximum operating pressure of its own, by controlling three-position three-way valve (20), left position is at,
The compressed air cell of hydraulic accumulator (7) connects with gas-loaded accumulator (9), and the partial high pressure gas in hydraulic accumulator (7) leads to
Three-position three-way valve (20) is crossed to be filled into gas-loaded accumulator (9)；
When the power output of engineering vehicle engine is less than the required energy of the hydraulic cylinder (6) lifting load, this is required
Energy is provided jointly by engineering vehicle engine and hydraulic energy recovery and stocking system, now, controls the 3-position-3-way
Valve (20) is in middle position, and compressed air cell and the gas-loaded accumulator (9) of the hydraulic accumulator (7) disconnect, the hydraulic pressure
Accumulator (7) releases energy first, when the pressure of the compressed air cell of the hydraulic accumulator (7) drops to certain given threshold
When, control the three-position three-way valve (20) to be in left position, the pressure by the gas-loaded accumulator (9) to the hydraulic accumulator (7)
Contracting air chamber is boosted, and the energy stored in gas-loaded accumulator is further discharged, when under the air pressure in gas-loaded accumulator
When dropping to setting limit pressure, whole hydraulic pressure and air pressure valve are closed in control, are stopped from hydraulic energy recovery and stocking system
Release energy；By described above, circulation work.
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| CN107034943B (en) * | 2017-04-24 | 2019-02-22 | 江苏师范大学 | One kind is based on the recoverable single pump excavator energy saver of four-way hydraulic transformer liquid |
| CN108591189B (en) * | 2018-03-19 | 2020-03-27 | 徐州工业职业技术学院 | Variable-parameter energy accumulator control system and movable arm energy-saving hydraulic system |
| EP3669990B1 (en) * | 2018-12-21 | 2023-08-16 | Metso Sweden AB | Monitoring system |
| CN110315923B (en) * | 2019-08-06 | 2024-01-26 | 珠海格力电器股份有限公司 | Air circuit device, air suspension system, automobile and control method of automobile |
| CN113096980B (en) * | 2021-03-31 | 2022-05-20 | 西安交通大学 | Quick reversing device and method for on-load tap-changer based on hydraulic transmission |
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