CN105697429B - Energy recovery control system and crane gear - Google Patents
Energy recovery control system and crane gear Download PDFInfo
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- CN105697429B CN105697429B CN201510969463.3A CN201510969463A CN105697429B CN 105697429 B CN105697429 B CN 105697429B CN 201510969463 A CN201510969463 A CN 201510969463A CN 105697429 B CN105697429 B CN 105697429B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
- F15B1/02—Installations or systems with accumulators
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F9/00—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
- B66F9/06—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks
- B66F9/075—Constructional features or details
- B66F9/20—Means for actuating or controlling masts, platforms, or forks
- B66F9/22—Hydraulic devices or systems
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B19/00—Testing; Calibrating; Fault detection or monitoring; Simulation or modelling of fluid-pressure systems or apparatus not otherwise provided for
- F15B19/005—Fault detection or monitoring
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/14—Energy-recuperation means
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Abstract
The invention discloses a kind of energy recovery control system and crane gear.Energy recovery control system includes hydraulic pump, main valve, hydraulic actuator, accumulator, first control valve and the second control valve, main valve has the first main valve pressure oil port, second main valve pressure oil port, main valve actuator port and main valve oil discharge outlet, hydraulic actuator has executive component actuator port, the outlet of hydraulic pump is connected with the first main valve pressure oil port, main valve actuator port is connected with executive component actuator port, executive component actuator port is connected with accumulator by the first control valve, first control valve controls the break-make of executive component actuator port and accumulator, accumulator is connected with the second main valve pressure oil port by the second control valve, second control valve controls the break-make of accumulator and the second main valve pressure oil port.The energy that accumulator absorbs can be directly acted on main valve by the energy recovery control system of the present invention when being applied in crane gear, and application is wider.
Description
Technical field
The present invention relates to engineering machinery field, more particularly to a kind of energy recovery control system and crane gear.
Background technology
Fork truck is widely used in workshop, warehouse etc. and requires higher occasion to environmental condition, and its structure and work characteristics are determined
Determine to carry when weight rises in pallet fork, it is necessary to which elevating ram, which provides it driving force, i.e. hydraulic cylinder, provides energy, by hydraulic energy
It is converted into gravitional force；And when pallet fork carries weight and declined, its potential energy is discharged.This potential energy is relative to frequent operation
Fork truck for it is considerable, such as can not effectively utilize, not only cause energy dissipation, will also cause the rise of hydraulic fluid temperature,
Influence system service behaviour.Therefore energy storage device is designed in its hydraulic system, the gesture discharged during goods is declined
It can store, and be used in next work period, the utilization ratio for improving energy is necessary.
Energy recycle device of the prior art mainly has two kinds, and one kind is to carry out energy regenerating using electric energy, another
Energy regenerating is carried out using hydraulic energy.Wherein, energy recovery control system schematic diagram such as Fig. 1 of energy regenerating is carried out using electric energy
Shown, in the presence of load gravity, the piston of hydraulic cylinder 18 is moved downward, and the hydraulic oil of the rodless cavity of hydraulic cylinder 18 is through two two
The right position of three-way electromagnetic valve 17 reaches the oil inlet of pump motor 13, promotes pump motor 13 to rotate, the motor 11 of pump motor 13 generates electricity,
Motor 11 is charged by inverter 12 to energy accumulating device such as battery or ultracapacitor etc., realizes energy regenerating.Wherein, two
Two three-way electromagnetic valves 17 of position are switch valve, do not play speed governing, so the decrease speed of weight is uncontrollable.
Fig. 2 show the energy recovery control system schematic diagram that energy regenerating is carried out using hydraulic energy.As shown in Fig. 2 liquid
Pressure energy is reclaimed mainly by accumulator 24, during lifting operation, manipulates the lifting piece handle of banked direction control valves 27, and valve stem depressions switch K2 is changed
The entrance oil circuit of electric commutation and turn-on accumulator 24 and hydraulic pump 23 is obtained to valve 26, so that the inlet and outlet pressure for reducing pump is poor,
Reduce the power demand of the transfer tube of motor 21；When declining operation, the lifting piece handle of banked direction control valves 27, valve stem depressions switch are manipulated
K1, reversal valve 29 is obtained electric and commutated, and the pressure in hydraulic cylinder 28 is stored into accumulator 24.
The energy recovery control system for carrying out energy regenerating using hydraulic energy of prior art has the following disadvantages：
1st, when carrying out energy regenerating to hydraulic energy, hydraulic oil is introduced pumping hydraulic fluid port by energy recovery control system, uncomfortable
Common gear pump is closed, general gear pump inlet port normal pressure requirement is no more than 1MPa, and special pump configuration will make cost increase, no
Beneficial to popularization and application.
2nd, energy recovery control system the setting mainly for electrical energy drive that the lifting class crane gear of prior art is used
It is standby, and the typically all internal combustion engine that large-tonnage lifting equipment is used, power of IC engine greatly, and is to meet rate request hydraulic pump
Discharge capacity is also big, and accumulator should not be introduced to the oil inlet of hydraulic pump, therefore the energy recovery control system of above prior art should
It is limited with scope.
3rd, the control valve for controlling energy regenerating is switch valve, and decrease speed can not be controlled after switching, and during switching
Because working connection and energy absorption loop have pressure difference, impact can be produced.
4th, declining in absorption process does not have pressure detecting, when the big cavity pressure of energy storage pressure and elevating ram is essentially identical
When, weight will be stagnated.
The content of the invention
It is an object of the invention to provide a kind of energy recovery control system and crane gear, it is intended to proposes that a kind of energy is returned
Control system is received, the problem of application for solving the energy recovery control system presence of prior art is limited.Further,
The problem of also solving uncontrollable weight decrease speed.
To achieve these goals, first aspect present invention provides a kind of energy recovery control system, including hydraulic pump, master
Valve, hydraulic actuator and accumulator, main valve have the first main valve pressure oil port, the second main valve pressure oil port, main valve working oil
Mouthful and main valve oil discharge outlet, main valve can control bound actuator port and the first main valve pressure oil port, the second main valve pressure oil port with
And the break-make of main valve oil discharge outlet, hydraulic actuator has an executive component actuator port, the outlet of hydraulic pump and the first main valve pressure
Power hydraulic fluid port is connected, and main valve actuator port is connected with executive component actuator port, and energy recovery control system also includes the first control
Valve and the second control valve, executive component actuator port are connected with accumulator by the first control valve, and the control of the first control valve is performed
The break-make of element manipulation hydraulic fluid port and accumulator, accumulator is connected with the second main valve pressure oil port by the second control valve, the second control
The break-make of valve control accumulator processed and the second main valve pressure oil port.
Further, the first control valve has the first hydraulic fluid port and the second hydraulic fluid port, and the first hydraulic fluid port of the first control valve is with performing
Element manipulation hydraulic fluid port is connected, and the second hydraulic fluid port of the first control valve is connected with accumulator, and the first control valve has the first operating position
With the second operating position, in the first operating position of the first control valve, its first hydraulic fluid port is connected with the second hydraulic fluid port, in the first control
Its first hydraulic fluid port of second operating position of valve and the second hydraulic fluid port disconnect.
Further, valve port opening when the first control valve can control its first hydraulic fluid port to be connected with the second hydraulic fluid port.
Further, the first control valve is electric proportional throttle valve.
Further, energy recovery control system also includes first pressure detecting element and second pressure detecting element, the
One pressure detecting element is connected with executive component actuator port, and second pressure detecting element is connected with accumulator.
Further, the second control valve includes the first hydraulic fluid port and the second hydraulic fluid port, the first hydraulic fluid port of the second control valve and accumulation of energy
Device is connected, and the second hydraulic fluid port of the second control valve is connected with the second main valve pressure oil port, and the second control valve has the first operating position
With the second operating position, in the first operating position of the second control valve, its first hydraulic fluid port is connected with the second hydraulic fluid port, in the second control
Its first hydraulic fluid port of second operating position of valve and the second hydraulic fluid port disconnect.
Further, energy recovery control system also compares valve including load pressure, and main valve also includes main valve load feedback
Mouthful, main valve can control the break-make of the first main valve pressure oil port and main valve load feedback mouthful, and load pressure compares valve and is used to pass through
Compare accumulator to connect or disconnect with oil extraction with the Stress control main valve load feedback mouthful of main valve load feedback mouthful.
Further, load pressure, which compares valve, includes the first hydraulic fluid port, the second hydraulic fluid port, the first control port and the second control end
Mouthful, load pressure compares the first hydraulic fluid port of valve, main valve load feedback mouthful and is connected to each other with the first control port, and load pressure compares
Second hydraulic fluid port of valve is connected with oil extraction, and the second control port is connected with accumulator, and load pressure compares valve with the first working position
Put with the second operating position, load pressure compare valve by compare accumulator and main valve load feedback mouthful Stress control its
Switch between one operating position and the second operating position, compare its first hydraulic fluid port of the first operating position of valve and the in load pressure
Two hydraulic fluid ports are connected, and compare its first hydraulic fluid port of the second operating position of valve in load pressure and the second hydraulic fluid port disconnects.
Further, energy recovery control system also includes check valve, and accumulator and the second main valve pressure oil port pass through the
Two control valves and check valve connection, check valve have check valve inlet and one-way valved outlet, wherein, check valve inlet and accumulator
Connection, one-way valved outlet is connected with the second control valve, or, check valve inlet is connected with the second control valve, one-way valved outlet and
Second main valve pressure oil port is connected.
Second aspect of the present invention provides the energy regenerating control of any one of a kind of crane gear, including first aspect present invention
System processed.
The technical scheme provided based on the present invention, the energy recovery control system is included hydraulic pump, main valve, hydraulic pressure and performs member
Part and accumulator, main valve have the first main valve pressure oil port, the second main valve pressure oil port, main valve actuator port and main valve oil extraction
Mouthful, main valve being capable of control bound actuator port and the first main valve pressure oil port, the second main valve pressure oil port and main valve oil discharge outlet
Break-make, hydraulic actuator has executive component actuator port, and the outlet of hydraulic pump is connected with the first main valve pressure oil port, main
Valve actuator port is connected with executive component actuator port, and energy recovery control system also includes the first control valve and the second control
Valve, executive component actuator port is connected with accumulator by the first control valve, the first control valve control executive component actuator port
With the break-make of accumulator, accumulator is connected with the second main valve pressure oil port by the second control valve, the control accumulation of energy of the second control valve
The break-make of device and the second main valve pressure oil port.The energy of the accumulator storage of the energy recovery control system can be directly by second
Main valve pressure oil port acts on main valve, can with the lifting equipment that heavy duty drives, because to pump inlet pressure without shadow
Ring, to also not limited as hydraulic pump using gear pump, therefore it is wider using scope.Further, in the first control valve energy
In the case of valve port opening when enough controlling its first hydraulic fluid port to be connected with the second hydraulic fluid port, member can be performed by valve port opening control
The oil extraction pressure of part, so that the speed that weight declines can also be controlled.
By referring to the drawings to the detailed description of the exemplary embodiment of the present invention, further feature of the invention and its
Advantage will be made apparent from.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the accompanying drawing used required in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, without having to pay creative labor, may be used also
To obtain other accompanying drawings according to these accompanying drawings.
Fig. 1 is the energy recovery control system principle schematic of the prior art that energy regenerating is carried out using electric energy；
Fig. 2 is the energy recovery control system principle schematic of the prior art that energy regenerating is carried out using hydraulic energy；
Fig. 3 is the principle schematic of the energy recovery control system of the embodiment of the present invention；
Fig. 4 for the embodiment of the present invention energy-recuperation system in main valve a specific example principle schematic.
Each reference is represented respectively：
11- motors；12- inverters；13- pump motors；15- overflow valves；17- 2/2-way magnetic valves；18- hydraulic cylinders；21-
Motor；23- hydraulic pumps；24- accumulators；26- reversal valves；27- banked direction control valves；28- hydraulic cylinders；29- reversal valves；4- energy regenerating controls
System processed；421- first pressure detecting elements；422- second pressure detecting elements；43- hydraulic pumps；44- accumulators；N- accumulators
Interface；46- energy regenerating control valves；A- recovery valve actuator ports；P- recovery valve pressure oil ports；E- recovery valve oil-outs；N- stores
Can device interface；Ls- recovery valves load feedback mouthful；T- recovery valve oil discharge outlets；The control valves of 461- first；The of the control valves of a1- first
One hydraulic fluid port；Second hydraulic fluid port of the control valves of a2- first；The control valves of 462- second；First hydraulic fluid port of the control valves of b1- second；B2- second
First hydraulic fluid port of control valve；463- load pressures compare valve；C1- load pressures compare the first hydraulic fluid port of valve；C2- load pressures ratio
Compared with the second hydraulic fluid port of valve；464- check valves；47- main valves；P1- the first main valve pressure oil ports；P2- the second main valve pressure oil ports；A1-
Main valve actuator port；LS1- main valves load feedback mouthful；T1- main valve oil discharge outlets；48- hydraulic actuators；W- executive components work
Hydraulic fluid port.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.Below
Description only actually at least one exemplary embodiment is illustrative, is never used as to the present invention and its application or makes
Any limitation.Based on the embodiment in the present invention, those of ordinary skill in the art are not making creative work premise
Lower obtained every other embodiment, belongs to the scope of protection of the invention.
Unless specifically stated otherwise, the part and positioned opposite, the digital table of step otherwise illustrated in these embodiments
Do not limited the scope of the invention up to formula and numerical value.
Simultaneously, it should be appreciated that for the ease of description, the size of the various pieces shown in accompanying drawing is not according to reality
Proportionate relationship draw.
It may be not discussed in detail for technology, method and apparatus known to person of ordinary skill in the relevant, but suitable
In the case of, technology, method and apparatus should be considered as authorizing a part for specification.
In shown here and discussion all examples, any occurrence should be construed as merely exemplary, without
It is as limitation.Therefore, the other examples of exemplary embodiment can have different values.
It should be noted that：Similar label and letter represents similar terms in following accompanying drawing, therefore, once a certain Xiang Yi
It is defined, then it need not be further discussed in subsequent accompanying drawing in individual accompanying drawing.
Fig. 3 shows the energy recovery control system of the embodiment of the present invention and the principle schematic of energy regenerating control valve.
As shown in figure 3, the energy regenerating control valve 46 of the present embodiment include the first control valve 461, the second control valve 462,
And with recovery valve actuator port A, recovery valve pressure oil port P, recovery valve oil-out E and accumulator N.Recovery valve pressure oil
Mouth P is connected with recovery valve actuator port A.Recovery valve actuator port A is connected by the first control valve 461 with accumulator N, the
One control valve 461 controls recovery valve actuator port A and accumulator N break-make；Accumulator N passes through the second control valve
462 are connected with recovery valve oil-out E, the second control valve 462 control accumulator N and recovery valve oil-out E break-make.
First control valve 461 has the first hydraulic fluid port a1 and the second hydraulic fluid port a2, wherein, the first hydraulic fluid port a1 and recovery valve working oil
Mouth A connections, the second hydraulic fluid port a2 is connected with accumulator N, and the first control valve 461 can control the oil of its first hydraulic fluid port a1 and second
Mouth a2 connection and disconnection.
Preferably, the first control valve 461 in the present embodiment has the first operating position and the second operating position, first
During operating position, its first hydraulic fluid port a1 is connected (the upper working position in Fig. 3) with the second hydraulic fluid port a2；(Fig. 3 at the second operating position
In lower working position), its first hydraulic fluid port a1 and the second hydraulic fluid port a2 disconnect.
As shown in figure 3, the energy recovery control system 4 of the present embodiment includes energy regenerating control valve 46, hydraulic pump 43 is main
Valve 47, hydraulic actuator 48 and accumulator 44.Wherein, main valve 47 has the first main valve pressure oil port P1, the second main valve pressure
Hydraulic fluid port P2, main valve actuator port A1 and main valve oil discharge outlet T1, main valve 47 being capable of control bound actuator port A1 and the first main valve pressures
Power hydraulic fluid port P1, the second main valve pressure oil port P2 and main valve oil discharge outlet T1 break-make.Hydraulic actuator 48 has executive component
Actuator port W.The outlet of hydraulic pump 43 is connected with the first main valve pressure oil port P1.The recovery valve pressure of energy regenerating control valve 46
Hydraulic fluid port P is connected with main valve actuator port A1.Recovery valve oil-out E is connected with the second main valve pressure oil port P2.Recovery valve working oil
Mouth A is connected with executive component actuator port W.Accumulator N is connected with accumulator 44.
Energy recovery control system 4 in above example makes second main valves of the recovery valve oil-out E directly with main valve 47
Pressure oil port P2 connections, the energy that accumulator 44 is stored directly can act on main valve 47 by recovery valve oil-out E, can be used in big
On the lifting equipment of power engine driving, because, without influence, not having as hydraulic pump to use gear pump on pump inlet pressure yet
Limitation, thus it is wider using scope.
In addition, the energy regenerating control valve 46 in energy recovery control system in above example is connected to executing agency
Before actuator port W and the second main valve pressure oil port P2 in-line, its first control valve 461 just can decline process in weight
Middle its first hydraulic fluid port a1 of control and the second hydraulic fluid port a2 connection is so as to reclaim potential energy and be stored in accumulator 44；Second control valve
462 can control accumulator 44 to release energy in good time.
In order that obtaining weight when being controlled during decline by the first control valve 461, the decrease speed of weight can be obtained
Effectively control, improves the comfort level of operation, in the present embodiment, and the first control valve 461 can control its first hydraulic fluid port a1 and the
Valve port opening when two hydraulic fluid port a2 are connected.
Preferably, the first control valve 461 in the present embodiment is electric proportional throttle valve, therefore, during weight decline,
Only need to setting the current value of electric proportional throttle valve into certain slope, i.e., electric current be set according to certain ratio, it is possible to
Effectively control the decrease speed of weight.
In the present embodiment, the second control valve 462 include the first hydraulic fluid port b1 and the second hydraulic fluid port b2, wherein the first hydraulic fluid port b1 with
Accumulator N connections, the second hydraulic fluid port b2 is connected with recovery valve oil-out outlet E.Second control valve valve 462 has the first work
Position and the second operating position, (the lower working position shown in Fig. 3), the first hydraulic fluid port b1 and second when it is in the first operating position
Hydraulic fluid port b2 is connected, when it is in the second operating position (the upper working position shown in Fig. 3), and the first hydraulic fluid port b1 and the second hydraulic fluid port b2 are disconnected
Open.Second control valve 462 for example can be 2/2-way solenoid directional control valve.
In order to detect executive component actuator port W and accumulator N pressure, so that according to detection executive component
Actuator port W and accumulator N pressure is controlled to the first control valve 461 and the second control valve 462, as shown in figure 3,
Energy regenerating control valve 46 is additionally provided with first pressure detection hydraulic fluid port and second pressure detection hydraulic fluid port, wherein, first pressure detection
Hydraulic fluid port is connected with recovery valve actuator port A, and second pressure detection hydraulic fluid port is connected with accumulator N.First pressure detection member
Part 421 is connected to first pressure detection hydraulic fluid port, and therefore, first pressure detecting element 421 can detect executive component actuator port W
Pressure value.Second pressure detecting element 422 is connected with second pressure detection hydraulic fluid port, therefore, the energy of second pressure detecting element 422
Enough detect accumulator N pressure value.
In the present embodiment, the first control valve 461 is electric proportional throttle valve.If first pressure detecting element 421 is detected
Pressure value be B1, the pressure value that second pressure detecting element 422 is detected be B2, then during the decline of weight, such as
Fruit B1 is not more than B2, then illustrates that potential energy can not be absorbed, and electric proportional throttle valve must not be electric, and executive component 48 is controlled by main valve 47
Decline.If B1 is more than B2 certain values, illustrate that potential energy can be absorbed, then main valve 47 does not work, electric proportional throttle valve obtains electric,
Electric proportional throttle valve is set to be in the first operating position, the first hydraulic fluid port a1 is connected with the second hydraulic fluid port a2, and valve port is in certain open
Degree, while making the second control valve 462 be in the second operating position, the first hydraulic fluid port b1 and the second hydraulic fluid port b2 are off, real
The decline process of executive component 48 is now controlled by energy regenerating control valve 46, that is, controls the decline process of weight, now accumulation of energy
Device 44 can absorb energy, in the energy absorption stage.This stage can by control the current value of electric proportional throttle valve come
Effectively the decrease speed of control weight, such as set the current value of electric proportional throttle valve certain slope, effectively prevent existing
There is the problem of can not being controlled present in technology decrease speed, improve the comfortableness of operation.
In the energy absorption stage, with the decline of weight, potential energy is gradated as pressure energy, is gradually stored to accumulator
44, accumulator N pressure is gradually increasing, it is, the pressure value B2 that second pressure detecting element 422 is detected is continuous
Increase, when compared with the pressure value B1 that first pressure detecting element 421 is detected, pressure value B1 and pressure value B2 difference are narrowed down to
During certain value, to ensure that weight there are enough decrease speeds, at this moment the current value of electric proportional throttle valve will be gradually reduced, together
When the opening of main valve 47 is inversely gradually increased, it is to avoid stagnated during the decline of weight.Furthermore it is also possible to make
By electric proportional throttle valve control declines of weight be transformed into by main valve control weight decline this process can with smooth transition,
Avoid impact.
Wherein, because the pressure difference between first pressure detecting element 421 and second pressure detecting element 422 is dynamic value,
First control valve 461 is controlled according to the dynamic value, absorption efficiency is higher.
To sum up, in whole energy absorption process, as a result of electric proportional throttle valve, using its speed-regulating function, make
Obtain whole operation speed controllable, improve the comfortableness of operation.In addition, first pressure detecting element 421 and second pressure detection
The setting of element 422 enables energy recovery control system while to executive component actuator port W and accumulator N pressure
Power detected and controlled accordingly according to pressure value, it is to avoid due to caused by energy regenerating decrease speed it is excessively slow or
Stop.
When accumulator 44 stores enough energy, it is possible to control the second control valve 462 to be in the first operating position,
So that its first hydraulic fluid port b1 is connected with the second hydraulic fluid port b2.The energy that accumulator 44 is stored directly can just be made by recovery valve oil-out E
For the second main valve pressure oil port P2, so as to be that executive component 48 provides energy by main valve 47.
As shown in figure 3, energy regenerating control valve 46 also compares valve 463, and energy regenerating control valve including load pressure
46 also have recovery valve load feedback mouthful Ls and recovery valve oil discharge outlet T, and load pressure compares valve 463 can be by comparing accumulator
Interface N controls recovery valve load feedback mouthful Ls and recovery valve oil discharge outlet T connection with recovery valve load feedback mouthful Ls pressure
Or disconnect.
In the present embodiment, load pressure, which compares valve 463, includes the first hydraulic fluid port c1, the second hydraulic fluid port c2, the first control port
With the second control port, load pressure compares the first hydraulic fluid port c1 of valve 463, recovery valve load feedback mouthful Ls and the first control port
It is connected to each other, the second hydraulic fluid port c2 that load pressure compares valve is connected with recovery valve oil discharge outlet T, and the second control port connects with accumulator
Mouth N connections.
Main valve 47 also includes main valve load feedback mouthful Ls1.The main valve load feedback mouthful Ls1 of main valve 47 and recovery valve load are anti-
Present mouth Ls connections.Main valve 47 can control its first main valve pressure oil port P1 and main valve load feedback mouthful Ls1 break-make.
Load pressure compares valve 463 with the first operating position and the second operating position, and load pressure compares valve 463 and passed through
The pressure (namely main valve load feedback mouthful Ls1 pressure) for comparing accumulator N and recovery valve load feedback mouthful Ls controls it
Switch between the first operating position and the second operating position, at the first operating position (the upper working position in Fig. 3), the first oil
Mouth c1 is connected with the second hydraulic fluid port c2；(the lower working position in Fig. 3), the first hydraulic fluid port c1 and the second hydraulic fluid port c2 in the second actuator port
Disconnect.
Load pressure compares valve 463 and is used to control whether the outlet of hydraulic pump 43 directly connects with fuel tank, so as to control liquid
Press pump 43 whether carry load work.First main valve pressure oil port P1 is connected and main valve load feedback mouthful with main valve load feedback mouthful Ls1
When Ls1 is connected with oil extraction, the not carry load work of hydraulic pump 43.
Specifically, during releasing energy, that is, during lifting heavy, load pressure compares valve 463 and compares load instead
Pressure of the mouth Ls pressure (namely main valve load feedback mouthful Ls1 pressure) with accumulator N is presented, in energy absorption process
When, accumulator 44 has stored enough energy.When needing lifting heavy, because load pressure compares valve in the present embodiment
463 the first control port is additionally provided with spring, it is therefore desirable to which accumulator N pressure is more than load feedback mouthful Ls pressure one
During definite value, load pressure can be made to compare valve 463 and be in the first operating position, its first hydraulic fluid port c1 is connected with the second hydraulic fluid port c2, liquid
The direct oil return of press pump 43, no longer loss of energy；Meanwhile, the second control valve 462 is in the first operating position, the pressure of accumulator 44
Directly enter main valve 47 through the second main valve pressure oil port P2, supply main valve 47 works.
With the release of energy, the pressure of accumulator 44 is gradually reduced, and when accumulator N insufficient pressure, is not reached
During pressure certain value more than load feedback mouthful Ls, load pressure, which compares valve 463, will be in the second operating position, while the second control
Valve 462 processed will be in the second operating position (upper in Fig. 3) main valve 47 by the fuel feeding of hydraulic pump 43.
Preferably, energy regenerating control valve 46 also includes check valve 464, and check valve 464 has check valve inlet and unidirectional
Valve outlet, check valve inlet is connected with accumulator N, and one-way valved outlet is connected with recovery valve oil-out E.As shown in figure 3,
In the present embodiment, check valve inlet is connected by the second control valve 462 with accumulator N.
Check valve 464 can also be arranged between accumulator N and the second control valve 462.
Check valve 464 can prevent the pressure oil of main valve 47 from entering through the second main valve pressure oil port P2 and recovery valve oil-out E
Enter in energy regenerating control valve 46.
Main valve 47 in above example can be any valve with aforementioned structure and function in the prior art, for example, tie
Structure schematic diagram valve as shown in Figure 4.
The present invention also proposes a kind of crane gear, including the energy recovery control system in above-described embodiment.This resets
Standby can be for example fork truck.
In summary, the energy recovery control system of the embodiment of the present invention makes one directly with main valve of recovery valve oil-out
Main valve pressure oil port is connected, and the energy of accumulator storage directly can act on main valve by recovery valve oil-out, and can be in big work(
Rate internal combustion engine drives, and can also utilize ordinary gear oil pump feed, expand the application of energy recovery control system.In addition, this
Adoption rate choke valve in inventive embodiments is controlled, and the decrease speed to the weight in energy absorption process is carried out effectively
Control, improves operating characteristics.
Finally it should be noted that：The above embodiments are merely illustrative of the technical scheme of the present invention and are not intended to be limiting thereof；To the greatest extent
The present invention is described in detail with reference to preferred embodiments for pipe, those of ordinary skills in the art should understand that：Still
The embodiment of the present invention can be modified or equivalent substitution is carried out to some technical characteristics；Without departing from this hair
The spirit of bright technical scheme, it all should cover among claimed technical scheme scope of the invention.
Claims (10)
1. a kind of energy recovery control system, including hydraulic pump (43), main valve (47), hydraulic actuator (48) and accumulator
(44), the main valve (47) has the first main valve pressure oil port (P1), the second main valve pressure oil port (P2), main valve actuator port
(A1) and main valve oil discharge outlet (T1), the main valve (47) can control the main valve actuator port (A1) and the first main valve pressure
The break-make of power hydraulic fluid port (P1), the second main valve pressure oil port (P2) and the main valve oil discharge outlet (T1), the hydraulic actuator
(48) there is executive component actuator port (W), the outlet of the hydraulic pump (43) connects with the first main valve pressure oil port (P1)
Connect, the main valve actuator port (A1) is connected with the executive component actuator port (W), it is characterised in that the energy regenerating
Control system also include the first control valve (461) and the second control valve (462), the executive component actuator port (W) with it is described
Accumulator (44) is connected by first control valve (461), and first control valve (461) controls the executive component work
The break-make of hydraulic fluid port (W) and the accumulator (44), the accumulator (44) passes through institute with the second main valve pressure oil port (P2)
The second control valve (462) connection is stated, second control valve (462) controls the accumulator (44) and the second main valve pressure
The break-make of hydraulic fluid port (P2).
2. energy recovery control system according to claim 1, it is characterised in that first control valve (461) has
First hydraulic fluid port (a1) and the second hydraulic fluid port (a2), the first hydraulic fluid port (a1) and the executive component work of first control valve (461)
Make hydraulic fluid port (W) connection, the second hydraulic fluid port (a2) of first control valve (461) is connected with the accumulator (44), described first
Control valve (461) has the first operating position and the second operating position, in the first operating position of first control valve (461)
Its first hydraulic fluid port (a1) is connected with the second hydraulic fluid port (a2), in its first oil of the second operating position of first control valve (461)
Mouth (a1) disconnects with the second hydraulic fluid port (a2).
3. energy recovery control system according to claim 2, it is characterised in that first control valve (461) can
Valve port opening when controlling its first hydraulic fluid port (a1) to be connected with the second hydraulic fluid port (a2).
4. energy recovery control system according to claim 3, it is characterised in that first control valve (461) is electricity
Proportional throttle valve.
5. energy recovery control system according to claim 1, it is characterised in that the energy recovery control system is also wrapped
Include first pressure detecting element (421) and second pressure detecting element (422), the first pressure detecting element (421) and institute
Executive component actuator port (W) connection is stated, the second pressure detecting element (422) is connected with the accumulator (44).
6. energy recovery control system according to claim 1, it is characterised in that second control valve (462) includes
First hydraulic fluid port (b1) and the second hydraulic fluid port (b2), the first hydraulic fluid port (b1) and the accumulator (44) of second control valve (462)
Connection, the second hydraulic fluid port (b2) of second control valve (462) is connected with the second main valve pressure oil port (P2), and described second
Control valve (462) has the first operating position and the second operating position, in the first operating position of second control valve (462)
Its first hydraulic fluid port (b1) is connected with the second hydraulic fluid port (b2), in its first oil of the second operating position of second control valve (462)
Mouth (b1) disconnects with the second hydraulic fluid port (b2).
7. energy recovery control system according to any one of claim 1 to 6, it is characterised in that the energy regenerating
Control system also compares valve (463) including load pressure, and the main valve (47) also includes main valve load feedback mouthful (Ls1), described
Main valve (47) can control the first main valve pressure oil port (P1) and the break-make of the main valve load feedback mouthful (Ls1), described
Load pressure compare valve (463) be used for pass through the relatively accumulator (44) and the pressure of main valve load feedback mouth (Ls1)
The main valve load feedback mouthful (Ls1) is controlled to connect or disconnect with oil extraction.
8. energy recovery control system according to claim 7, it is characterised in that the load pressure compares valve (463)
Including the first hydraulic fluid port (c1), the second hydraulic fluid port (c2), the first control port and the second control port, the load pressure compares valve
(463) the first hydraulic fluid port (c1), the main valve load feedback mouthful (Ls1) are connected to each other with first control port, described negative
Carry pressure ratio to be connected with oil extraction compared with the second hydraulic fluid port (c2) of valve (463), second control port connects with the accumulator (44)
Connect, the load pressure compares valve (463) with the first operating position and the second operating position, and the load pressure compares valve
(463) by the Stress control of the relatively accumulator (44) and the main valve load feedback mouthful (Ls1) its in the first working position
Put and switch between the second operating position, compare its first hydraulic fluid port of the first operating position of valve (463) in the load pressure
(c1) connected with the second hydraulic fluid port (c2), compare its first hydraulic fluid port (c1) of the second operating position of valve (463) in the load pressure
Disconnected with the second hydraulic fluid port (c2).
9. the energy recovery control system according to any one of claim 1-6, it is characterised in that the energy regenerating control
System processed also includes check valve (464), and the accumulator (44) passes through described second with the second main valve pressure oil port (P2)
Control valve (462) and the check valve (464) connection, the check valve (464) have check valve inlet and one-way valved outlet, its
In, the check valve inlet is connected with the accumulator (44), and the one-way valved outlet connects with second control valve (462)
Connect, or, the check valve inlet is connected with second control valve (462), the one-way valved outlet and second main valve
Pressure oil port (P2) is connected.
10. a kind of crane gear, it is characterised in that the crane gear includes the energy any one of claim 1-9
Recovery control system.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510969463.3A CN105697429B (en) | 2015-12-22 | 2015-12-22 | Energy recovery control system and crane gear |
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| CN201510969463.3A CN105697429B (en) | 2015-12-22 | 2015-12-22 | Energy recovery control system and crane gear |
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| CN105697429B true CN105697429B (en) | 2017-08-08 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107061427A (en) * | 2017-01-12 | 2017-08-18 | 临沭县精伦液压件销售有限公司 | A kind of engineering machinery large arm potential energy is reclaimed and release system |
| CN110374941B (en) * | 2019-01-09 | 2020-12-22 | 浙江大学 | Forklift potential energy recovery system self-adaptive to load weight and control method |
| CN110454445A (en) * | 2019-07-18 | 2019-11-15 | 中联重科股份有限公司 | Potential energy recovering hydraulic system and lifting device |
| CN114590749A (en) * | 2022-02-25 | 2022-06-07 | 安徽合力股份有限公司 | Forklift full-freedom portal hydraulic system with impact absorption function |
| CN114940467B (en) * | 2022-05-24 | 2023-11-03 | 华侨大学 | Electro-hydraulic composite forklift and driving system, method and device thereof as well as storage medium |
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