CN104196796B - A kind of for excavator energy regenerating and the pile-up valve with antioverloading function - Google Patents
A kind of for excavator energy regenerating and the pile-up valve with antioverloading function Download PDFInfo
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- CN104196796B CN104196796B CN201410410117.7A CN201410410117A CN104196796B CN 104196796 B CN104196796 B CN 104196796B CN 201410410117 A CN201410410117 A CN 201410410117A CN 104196796 B CN104196796 B CN 104196796B
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Abstract
The invention discloses a kind of for excavator energy regenerating and the pile-up valve with antioverloading function, including valve body, valve body is provided with the first hydraulic fluid port A1, the first pressure port P1, the second pressure port P2, the 3rd pressure port P3；First hydraulic fluid port A1 is connected by the first of pile-up valve the outside oil circuit and the second pressure port P2, is provided with first check valve at the second pressure port P2；Second check valve it is also provided with on pile-up valve internal oil passages between first pressure port P1 and the second pressure port P2；The first guiding valve, the first logical valve, the first logic control valve it is additionally provided with within valve body.Being provided with an overload valve pocket in valve body, overload valve intracavity is provided with an overload valve.The present invention a kind of for excavator energy regenerating and the pile-up valve with antioverloading function, has energy when recyclable big arm of digger declines, the excessive damage external energy storage device that can prevent from recovering energy, functional reliability is good, save the advantages such as the energy.
Description
Technical field
The present invention relates to a kind of pile-up valve, a kind of for excavator energy regenerating and the collection with antioverloading function
Become valve.
Background technology
Excavator, also known as excavation machinery (excavating machinery), is to excavate higher or lower than holding machine with scraper bowl
The material in face, and load haulage vehicle or unload the earthmoving machinery to rickyard.Excavator excavate material be mainly soil, coal,
Silt and the soil after pre-pine and rock.From the point of view of the development of engineering machinery in recent years, the development of excavator is relatively
Hurry up, excavator has become as one of topmost engineering machinery in engineering construction.What excavator now accounted for the overwhelming majority is complete
Hydraulic pressure full circle swinging excavator.The Hydraulic Power Transmission System of excavator by hydraulic pump the power of electromotor passed to hydraulic motor,
The executive components such as hydraulic cylinder, push the work forward device action, thus completes various operation.
In the course of the work, its large arm frequently declines and rises excavator.In the work process of excavator, there are a kind of feelings
Shape need not consumption of engine power, when i.e. large arm falls from high to low.During big arm of digger declines, it
Potential energy is also by reducing greatly, and these energy are also wasted.At present, excavator there is no the energy regenerating dress that outfit is special
Put.
The Chinese utility model patent of Application No. CN201320587141.9 discloses a kind of band potential energy recovery device
Big arm of digger energy regenerating device, including large arm and the master cylinder being fixed on large arm both sides, master cylinder is by electromagnetic valve group even
Logical fuel tank, is hinged with fluid force-transmitting mechanism between described large arm and frame, fluid force-transmitting mechanism, between two master cylinders, flows
Body force transmission mechanism connects accumulator, the hidden inside being fixed on large arm of accumulator by pipeline.Although this utility model is to excavation
The energy-recuperation system of machine is described, but is not related to the introduction of the special valve of excavator energy regenerating.
Summary of the invention
The present invention is for avoiding weak point present in above-mentioned prior art, it is provided that a kind of for excavator energy regenerating
And have the pile-up valve of antioverloading function, so that gravitional force when big arm of digger declines reclaims and prevents energy regenerating
Time overload pressure too high damage system, make excavator the most energy-conservation.
The present invention solves that technical problem is by the following technical solutions.
A kind of for excavator energy regenerating and the pile-up valve with antioverloading function, it is structurally characterized in that, including valve body,
The first hydraulic fluid port A1, the first pressure port P1, the second pressure port P2, the 3rd pressure port P3 it is provided with on described valve body；Described first oil
Mouth A1 is connected with described second pressure port P2 by the first of pile-up valve the outside oil circuit, is provided with at described second pressure port P2
One the first check valve so that the hydraulic oil at described first hydraulic fluid port A1 can be through described in described outside oil circuit single flow direction second
Pressure port P2；It is also provided with one on pile-up valve internal oil passages between described first pressure port P1 and described second pressure port P2
Second check valve so that the hydraulic oil when energy discharges is merely able to from second pressure port P2 single flow direction the first pressure port P1；
Described first pressure port P1 is connected with oil cylinder of big arm of digger, and described first pressure port P1 is to big arm cylinder fuel feeding
Time large arm rise, during described first pressure port P1 oil return large arm decline；Described second pressure port P2 interior oil by pile-up valve
Road is connected with described 3rd pressure port P3, and described 3rd pressure port P3 and an external energy storage device are connected；
The first piston chamber and the first logic valve pocket, described first piston chamber and the first logic valve pocket it is provided with in described valve body
Between be connected by the first oil duct；Described first logic valve pocket is by the internal galleries of pile-up valve and described first pressure port P1
Being connected, described first logical valve is arranged in described first logic valve pocket, is used for controlling described first pressure port P1 with described
Break-make between first oil duct；First logical valve includes the first logic spool and the first logical valve spring；First logic spool sets
Being placed in described first logical valve intracavity, the first logical valve spring is located at below described first logic spool, described first logical valve
Closed by a plug screw below spring；
Described first logic valve pocket is also by the second oil duct and the 3rd oil duct and the first logic control being arranged at outside valve body
Valve is connected；Described first logic control valve includes the first logic control valve body, the first logic control spool, the first logic control
Valve spring, interface Pib1, interface T1；Described first logic control valve body is fixed on described valve body, the first logic control valve body
Inside being provided with the first logic control valve pocket, described first logic control spool, the first logic control valve spring may be contained within described
In first logic control valve pocket, described first logic control valve pocket is by respectively by the second logic control oil duct and the 3rd logic
Control oil duct to be connected with described second oil duct and the 3rd oil duct；Described first logic control spool is used for controlling described second and patrols
Collect the break-make controlled between oil duct and the 3rd logic control oil duct；Described interface Pib1 controls oil by outside oil circuit with excavator
Pi1 is connected；Described interface T1 is connected with oil return inlet T；
It is provided with the first guiding valve in described first piston chamber；Described first guiding valve includes the first slide valve lever, the first guiding valve bullet
Spring, the first left sealing cap and the first right aling cap；Described first slide valve lever is inserted in described first piston chamber, described first piston chamber
Two ends, left and right closed by described first left sealing cap and the first right aling cap respectively, thus described first slide valve lever is closed in described
Within valve body；Described first slide valve spring is positioned in the inner chamber of described first left sealing cap, is used for so that the first slide valve lever is to moving to left
Reset to the right after Dong；The right-hand member of described first slide valve lever is inserted in the inner chamber of described first right aling cap, described first right aling cap
Inner chamber control oil Pi1 by interface Pia1 and excavator and be connected；
Being provided with an overload valve pocket in described valve body, described overload valve intracavity is provided with an overload valve；Described overload
Internal oil passages between valve pocket with described 3rd pressure port P3 and described second pressure port P2 is connected, described overload valve pocket also with
Oil return inlet T is connected, described overload valve control the interior oil between described 3rd pressure port P3 and described second pressure port P2
Break-make between road and described oil return inlet T.
A kind of construction features for excavator energy regenerating and the pile-up valve with antioverloading function of the present invention also exists
In:
Described overload valve includes main valve housing, main valve plug, main spool spring, conical valve base, poppet valve core, cone valve spring, sleeve pipe and tune
Pressure screw；
Described main valve housing lower end is provided with overload valve pressure port, described overload valve pressure port and described second pressure port P2 it
Between be connected；Being provided with main valve plug and conical valve base in the inner chamber of described main valve housing, described conical valve base is positioned at the upper of described main valve plug
Side；Overload valve oil return inlet T 3 it is provided with, in described overload valve oil return inlet T 3 and described main valve housing on the outer peripheral face of described main valve housing
The part cavity below main valve plug that is positioned in chamber communicates；
Described main valve plug top is provided with main valve plug groove, and the lower section of described main valve plug groove offers the first damping hole,
Described first damping hole is along the described main valve plug that axially penetrates through of described main valve plug, described main valve plug groove and described overload valve pressure
It is connected by described first damping hole between power mouth；The lower end of described main spool spring be positioned at described main valve plug groove and with institute
The bottom land stating main valve plug groove abuts against, and the upper end of described main spool spring abuts against with the lower surface of described conical valve base；Described cone
Axially penetrating through in the shoulder hole of described conical valve base, the lower end insertion of described poppet valve core along described conical valve base it is arranged in valve seat
Within described shoulder hole epimere, the hypomere of described shoulder hole is the second damping hole, and described shoulder hole passes through described second damping hole
It is connected with the main valve housing inner chamber below poppet valve core and described main valve plug groove；Described casing pipe sleeve is located at the epimere of described main valve housing
Outer peripheral face on, between the outer peripheral face of described internal surface of sleeve pipe and described main valve housing, be formed with the first oil back chamber and the second oil return
Chamber；The upper end of described poppet valve core is positioned in the inner chamber of described sleeve pipe, is provided with cone valve spring, described pressure regulation on described poppet valve core
The lower end of screw is threaded in the inner chamber epimere of described sleeve pipe, the upper end of described cone valve spring and described pressure regulating screw
Lower end abuts against；Described first oil back chamber and the intracavity inter-connection of described sleeve pipe, described second oil back chamber returns with described overload valve
Hydraulic fluid port T3 is connected；Described overload valve oil return inlet T 3 is connected with the oil return inlet T of valve body.
A nut it is provided with, with threaded engagement between described nut and described pressure regulating screw on the top of described sleeve pipe
Mode is connected；Stairstepping sealing ring it is provided with between described nut and described sleeve pipe.
A second hydraulic fluid port A2 it is additionally provided with on described valve body.
Compared with the prior art, the present invention has the beneficial effect that:
The present invention a kind of is for excavator energy regenerating and the pile-up valve with antioverloading function, by controlling making of oil
A1 mouth is connected by the first piston chamber and the first oil duct, so that P1 mouth is connected with A1 mouth.Energy outside the connection of A1 mouth converts
Device, potential energy when being declined by oil cylinder is become hydraulic oil to pass through in the pile-up valve that P2 mouth enters the present invention, then is entered by P3 mouth
Enter external energy storage device, thus energy is stored, it is achieved by the purpose of the energy regenerating that big arm of digger declines.The
One logical valve is located between P1 mouth and the A1 mouth declining energy regenerating oil circuit；First it is provided with sliding between the first logical valve and A1 mouth
Valve, is changed the displacement of the first guiding valve, thus changes the opening between the first logical valve and A1 mouth by the pressure size controlling oil
Size, reaches to control to decline flow during energy regenerating.
P2 mouth arranges overload valve, overload pressure too high damage external energy storage device when preventing energy regenerating.
The present invention a kind of for excavator energy regenerating and the pile-up valve with antioverloading function, has recyclable excavation
Energy, the excessive damage external energy storage device that can prevent from recovering energy when machine large arm declines, functional reliability is good, save energy
The advantages such as source.
Accompanying drawing explanation
Fig. 1 is that the present invention a kind of is for excavator energy regenerating and the front view of the pile-up valve with antioverloading function.
Fig. 2 is that the present invention a kind of is for excavator energy regenerating and the top view of the pile-up valve with antioverloading function.
Fig. 3 is that the present invention a kind of is for excavator energy regenerating and the left view of the pile-up valve with antioverloading function.
Fig. 4 is that the present invention a kind of is for excavator energy regenerating and the hydraulic principle of the pile-up valve with antioverloading function
Figure.
Fig. 5 is A-A sectional view (the cuing open of second logical valve of the present invention, the second guiding valve and the second logic control valve in Fig. 2
View).
Fig. 6 is B-B sectional view (the cuing open of first logical valve of the present invention, the first guiding valve and the first logic control valve in Fig. 2
View).
B-B sectional view in Fig. 2 when Fig. 7 is energy regenerating.
A-A sectional view in Fig. 2 when Fig. 8 is energy release.
Fig. 9 is the partial view (overload valve does not transships, attonity) of the C-C sectional view in Fig. 3.
Figure 10 is the partial view (overload valve transships, overload valve action) of the C-C sectional view in Fig. 3.
Figure 11 is the structure chart of the overload valve in Fig. 9 and 10.
Label in accompanying drawing 1～accompanying drawing 11: 1 valve body, 2 first check valves, 3 second check valves, 301 second nonreturn valve cores, 302
Second one-way valve spring, 303 second check valve plug screws, 4 big arm cylinders, 5 first piston chambers, 6 first logic valve pockets, 7 first patrol
Volume control valve, 701 first logic control valve bodies, 702 first logic control spools, 703 first logic control valve springs, 704 the
One logic control valve pocket, 705 second logic control oil ducts, 706 the 3rd logic control oil ducts, 8 first oil ducts, 9 second oil ducts, 10
3rd oil duct, 11 the 4th oil ducts, 12 the 5th oil ducts, 13 the 6th oil ducts, 14 the 7th oil ducts, 15 nuts, 16 pressure regulating screws, 17 sets
Pipe, 18 energy conversion devices, 19 stairstepping sealing rings, 20 first logical valves, 2,001 first logic spools, 2,002 first logical valves
Spring, 21 second logical valves, 2,101 second logic spools, 2,102 second logical valve springs, 2,103 second logical valve plug screws, 22
One outside oil circuit, 23 external energy storage devices, 24 first guiding valves, 2,401 first slide valve levers, 2,402 first slide valve springs, 2403
First left sealing cap, 2,404 first right aling caps, 25 second guiding valves, 2,501 second slide valve levers, 2,502 second slide valve springs, 2,503 second
Left sealing cap, 2,504 second right aling caps, 26 overload valve pockets, 27 overload valves, 2701 main valve housings, 2702 main valve plugs, 2703 main spool springs,
2704 conical valve bases, 2705 poppet valve cores, 2706 cone valve springs, 2707 overload valve pressure port, 2708 main valve plug grooves, 2,709 first resistances
Buddhist nun hole, 2,710 second damping holes, 2711 shoulder holes, 2,712 first oil back chambers, 2,713 second oil back chambers, 28 second piston chambers, 29
Second unidirectional valve pocket, 2,901 second check valve upper cavities, 2,902 second check valve lower chambers, 30 second logic valve pockets, 3,001
Two logical valve upper cavities, 3,002 second logical valve lower chambers, 31 second logic control valves, 3,101 second logic control valve bodies,
3102 second logic control spools, 3,103 second logic control valve springs, 3,104 second logic control valve pockets, 3105 the 5th logics
Control oil duct, 3105 the 6th logic control oil ducts.
Below by way of detailed description of the invention, and the invention will be further described to combine accompanying drawing.
Detailed description of the invention
Seeing accompanying drawing 1～accompanying drawing 11, the present invention a kind of is for excavator energy regenerating and the collection with antioverloading function
Become valve, including valve body 1, described valve body 1 is provided with the first hydraulic fluid port A1, the first pressure port P1, the second pressure port P2, the 3rd pressure
Mouth P3；Described first hydraulic fluid port A1 is connected with described second pressure port P2 by the first of pile-up valve the outside oil circuit 22, and described the
First check valve 2 it is provided with so that the hydraulic oil at described first hydraulic fluid port A1 can be through described outside at two pressure port P2
Second pressure port P2 described in oil circuit single flow direction；In pile-up valve between described first pressure port P1 and described second pressure port P2
Second check valve 3 it is also provided with so that the hydraulic oil when energy discharges is merely able to from the second pressure port P2 on portion's oil circuit
Single flow direction the first pressure port P1；
Described first pressure port P1 is connected with oil cylinder of big arm of digger 4, and described first pressure port P1 supplies to big arm cylinder 4
During oil, large arm rises, and during described first pressure port P1 oil return, large arm declines；Described second pressure port P2 inside by pile-up valve
Oil circuit is connected with described 3rd pressure port P3, and described 3rd pressure port P3 and an external energy storage device 23 are connected；
The first piston chamber 5 and the first logic valve pocket 6, described first piston chamber 5 and the first logic it is provided with in described valve body 1
It is connected by the first oil duct 8 between valve pocket 6；The described first logic valve pocket 6 internal galleries and described first by pile-up valve
Pressure port P1 is connected, and described first logical valve 20 is arranged in described first logic valve pocket 6, is used for controlling described first pressure
Break-make between mouth P1 and described first oil duct 8；First logical valve 20 includes the first logic spool 2001 and the first logical valve bullet
Spring 2002；First logic spool 2001 is arranged in described first logic valve pocket 6, and the first logical valve spring 2002 is located at described
Below one logic spool 2001, closed by a plug screw below described first logical valve spring 2002；
Described first logic valve pocket 6 is also by the second oil duct 9 and the 3rd oil duct 10 and the first logic being arranged at outside valve body 1
Control valve 7 is connected；Described first logic control valve 7 include first logic control valve body the 701, first logic control spool 702,
First logic control valve spring 703, interface Pib1, interface T1；Described first logic control valve body 701 is fixed on described valve body 1
On, it is provided with the first logic control valve pocket 704 in the first logic control valve body 701, described first logic control spool 702,
One logic control valve spring 703 may be contained within described first logic control valve pocket 704, described first logic control valve pocket 704
By respectively by the second logic control oil duct 705 and the 3rd logic control oil duct 706 and described second oil duct 9 and the 3rd oil duct
10 are connected；Described first logic control spool 702 is used for controlling described second logic control oil duct 705 and the 3rd logic control
Break-make between oil duct 706；Described interface Pib1 controls oil Pi1 by outside oil circuit with excavator and is connected；Described interface T1
It is connected with oil return inlet T；
It is provided with the first guiding valve 24 in described first piston chamber 5；Described first guiding valve 24 include the first slide valve lever 2401,
One slide valve spring the 2402, first left sealing cap 2403 and the first right aling cap 2404；Described first slide valve lever 2401 is inserted in described
In one piston chamber 5, the two ends, left and right of described first piston chamber 5 are respectively by described first left sealing cap 2403 and the first right aling cap 2404
Close, thus within described first slide valve lever 2401 is closed in described valve body 1；Described first slide valve spring 2402 is positioned at described
In the inner chamber of the first left sealing cap 2403, reset to the right after being used for being moved to the left so that the first slide valve lever 2401；Described first guiding valve
The right-hand member of bar 2401 is inserted in the inner chamber of described first right aling cap 2404, and the inner chamber of described first right aling cap 2404 passes through interface
Pia1 controls oil Pi1 and is connected with excavator；
It is provided with an overload valve pocket 26 in described valve body 1, in described overload valve pocket 26, is provided with an overload valve 27；Institute
State overload valve pocket 26 to be connected with the internal oil passages between described 3rd pressure port P3 and described second pressure port P2, described overload
Valve pocket 26 is also connected with oil return inlet T, described overload valve 27 control described 3rd pressure port P3 and described second pressure port P2
Between internal oil passages and described oil return inlet T between break-make.
As Fig. 1-3 be the present invention a kind of for excavator energy regenerating and the profile of the pile-up valve with antioverloading function
Figure.It is also provided with the second logical valve and the second logic control valve in pile-up valve, is used for so that external energy storage device is reclaimed
Hydraulic oil reuse, for big arm of digger rise provide the pressure energy.Fig. 4 is the hydraulic schematic diagram of pile-up valve.Fig. 5 and Tu
6 are respectively the A-A sectional view in Fig. 2 and B-B sectional view, can be seen that the first logical valve and the internal junction of the second logical valve respectively
Structure.Oil return inlet T is the oil return opening of pile-up valve, is connected with outside oil sump tank.Fig. 6 is the first logical valve, the first guiding valve and
The structure chart of one logic control valve, realizes pile-up valve by parts such as the first logical valve, the first guiding valve and the first logic control valves
The energy recovery function when big arm cylinder of excavator is fallen.Fig. 5 is the second logical valve, the second guiding valve and the second logic control
The structure chart of valve, realizes the big arm cylinder of excavator by parts such as the second logical valve, the second guiding valve and the second logic control valves
During rising, the energy reclaiming storage is discharged again, help big arm cylinder to rise, thus save the energy.
When Fig. 7 is to reclaim after the action of the first logical valve in Fig. 6, the first guiding valve and the first logic control valve
Figure.Now, the second logical valve in Fig. 5, the second guiding valve and the second logic control valve attonity, the second logical valve, the second guiding valve
It is closed mode, noenergy release movement.
When Fig. 8 is energy release after the action of the second logical valve, the second guiding valve and the second logic control valve in Fig. 5
Figure.Now, the first logical valve in Fig. 6, the first guiding valve and the first logic control valve attonity, the first logical valve, the first guiding valve
It is to close, noenergy recovery action.
Fig. 9 is in energy recovery process, structure chart when overload valve does not transships, and overload valve is closed, No-mistake Principle
Protection act.Figure 10 is in energy recovery process, and structure chart during overload valve overload, overload valve is in open mode, has overload
Protection act.Figure 11 is the sectional view of the overload valve in Fig. 9 and 10.
The present invention a kind of is for excavator energy regenerating and the energy recovery process of the pile-up valve with antioverloading function
As follows.
Oil cylinder of big arm of digger decline during, from Fig. 4 hydraulic schematic diagram with the B-B sectional view of Fig. 6, interface
Pia1 with Pib1 be parallel to by exterior line together with, connecting excavator controls oil Pi1.Pia2 Yu Pib2 is to pass through exterior tube
Road is parallel to together, and connecting excavator controls oil Pi2.When oil circuit control Pi1 provides pressure oil, under oil cylinder of big arm of digger
Fall；When Pi2 provides pressure oil, oil cylinder of big arm of digger rises.When Pi1 provides pressure, when pressure reaches 0.5MPa, i.e.
Pib1 reaches 0.5Mpa, and the first logic control spool of the first logical valve control valve is pressed towards the first logic control valve spring, the
Oil circuit between second logic control oil duct 705 and the 3rd logic control oil duct 706 is cut off by one logic control spool, and by the
Three logic control oil ducts 706 are connected with oil return inlet T by interface T1；Now, the 3rd logic control oil duct 706 and the 3rd oil duct 10
Communicate.
First logic valve pocket is divided into ante-chamber and two cavitys of back cavity by the first logic spool；It is positioned at above the first logic spool
For ante-chamber, be positioned at below the first logic spool for back cavity；Wherein, this ante-chamber and the first pressure port P1 communicate.Due to second
Oil duct 9 with the 3rd oil duct 10 respectively back cavity with the ante-chamber above the first logic spool and lower section be connected, therefore the first logic
The back cavity of valve is connected by the 3rd oil duct, the 3rd logic control oil duct oil return inlet T, and the pressure of the back cavity of the first logical valve is 0.
Cut off, when the first logic spool by described first logic spool between ante-chamber and described first oil duct above first logic spool
During decline, ante-chamber and the first oil duct are connected.Owing to the back cavity of the first logical valve connects with oil return opening so that after the first logical valve
The pressure in chamber is 0, and ante-chamber and the first pressure port P1 above the first logic spool communicates, and P1 mouth hydraulic oil is by the first logical valve
Core is pressed downward against, and makes the first logical valve open and P1 mouth and the first oil duct is connected.
When Pi1 pressure increases more than 0.7MPa, i.e. Pia1 pressure promotes the first guiding valve more than 0.7Mpa, Pia1 pressure oil
It is moved to the left, makes A1 mouth be connected by the first piston chamber and the first oil duct, so that P1 mouth is connected with A1 mouth.As shown in Figure 6, by
In adding the second check valve between P1 mouth and P2 mouth, make P1 mouth oil directly cannot enter P2 mouth by the 4th oil duct, but
P2 mouth oil can enter to enter P1 mouth by the 4th oil duct provides energy release to make oil cylinder increase.Energy conversion device 18 is arranged on A1
Between mouth and P2 mouth.Energy conversion device 18 outside the connection of A1 mouth, potential energy when being declined by oil cylinder becomes hydraulic oil to pass through
P2 mouth enters in the pile-up valve of the present invention, then enters external energy storage device by P3 mouth, thus is stored by energy, real
The purpose of the energy regenerating now big arm of digger declined.
First guiding valve of the pile-up valve of the present invention also has flow control function.Flow control process is as follows: when Pi1 pressure
During more than 0.7MPa, after the first oil duct is connected by the first guiding valve with A1 mouth, by controlling the pressure of Pi1 at 0.7MPa～3.5MPa
Between change, different pressures realizes different thrusts to the first guiding valve, it is achieved the first guiding valve is in diverse location, thus controls the
Openings of sizes between one oil duct and A1 mouth, finally controls by the flow of opening part to realize the flow control to P1 mouth to A1 mouth
System, reaches to control oil cylinder decrease speed so that big arm of digger can slowly decline, and causes thing without landing suddenly
Therefore, improve the security reliability of excavator work.
When big arm of digger declines, gravitional force is excessive, the hydraulic oil pressure that energy conversion device 18 produces is excessive,
Whole energy-recuperation system may be damaged.So during declining, once the hydraulic oil pressure converted exceedes overload valve
Setting pressure, hydraulic oil is opened through P2 mouth to P3 mouth, the overload valve between P2 mouth and P3 mouth, by the Stress control of hydraulic oil
In setting safety range, it is ensured that the safety of whole system.
Described overload valve 27 includes main valve housing 2701, main valve plug 2702, main spool spring 2703, conical valve base 2704, poppet valve core
2705, cone valve spring 2706, sleeve pipe 17 and pressure regulating screw 16；
Described main valve housing 2701 lower end is provided with overload valve pressure port 2707, described overload valve pressure port 2707 and described the
It is connected between two pressure port P2；The inner chamber of described main valve housing 2701 is provided with main valve plug 2702 and conical valve base 2704, described
Conical valve base 2704 is positioned at the top of described main valve plug 2702；It is provided with overload valve oil return opening on the outer peripheral face of described main valve housing 2701
T3, described overload valve oil return inlet T 3 communicates with the part cavity below main valve plug 2702 that is positioned at of described main valve housing 2701 inner chamber；
Described main valve plug 2702 top is provided with main valve plug groove 2708, and the lower section of described main valve plug groove 2708 offers
First damping hole 2709, described first damping hole 2709 axially penetrates through described main valve plug 2702 along described main valve plug 2702,
It is connected by described first damping hole 2709 between described main valve plug groove 2708 with described overload valve pressure port 2707；Described
The lower end of main spool spring 2703 is positioned at described main valve plug groove 2708 and the bottom land with described main valve plug groove 2708 abuts against,
The upper end of described main spool spring 2703 abuts against with the lower surface of described conical valve base 2704；It is arranged at edge in described conical valve base 2704
That described conical valve base 2704 axially penetrates through in the shoulder hole 2711 of described conical valve base 2704, and the lower end of described poppet valve core 2705 is inserted
Within entering described shoulder hole 2711 epimere, the hypomere of described shoulder hole 2711 is the second damping hole 2710, described shoulder hole 2711
By main valve housing 2701 inner chamber below described second damping hole 2710 and poppet valve core 2705 and described main valve plug groove 2708 phase
Connection；On the outer peripheral face of the epimere that described sleeve pipe 17 is sheathed on described main valve housing 2701, described sleeve pipe 17 inwall and described master
The first oil back chamber 2712 and the second oil back chamber 2713 it is formed with between the outer peripheral face of valve pocket 2701；The upper end of described poppet valve core 2705
It is positioned in the inner chamber of described sleeve pipe 17, on described poppet valve core 2705, is provided with cone valve spring 2706, described pressure regulating screw 16
Lower end is threaded in the inner chamber epimere of described sleeve pipe 17, the upper end of described cone valve spring 2706 and described pressure regulating screw 16
Lower end abut against；The intracavity inter-connection of described first oil back chamber 2712 and described sleeve pipe 17, described second oil back chamber 2713 with
Described overload valve oil return inlet T 3 is connected；Described overload valve oil return inlet T 3 is connected with the oil return inlet T of valve body 1.
A nut 15 it is provided with, with spiral shell between described nut 15 and described pressure regulating screw 16 on the top of described sleeve pipe 17
The mode that stricture of vagina coordinates is connected；Stairstepping sealing ring 19 it is provided with between described nut and described sleeve pipe 17.
A second hydraulic fluid port A2 it is additionally provided with on described valve body 1.A2 mouth is standby hydraulic fluid port, is in parallel with A1 mouth, in work
When making, A1 Yu A2 mouth arbitrarily selects one, facilitates connecting line, and another sealed in external is stifled to be closed.
Described overload valve such as Figure 11, including main valve housing, main valve plug, main spool spring, conical valve base, poppet valve core, cone valve spring, set
The parts such as pipe, nut and pressure regulating screw.Overload valve pressure port below main valve housing is in parallel with the second pressure port P2, overload valve oil return
Mouth T3 is connected with the oil return inlet T of valve body.When P2 mouth pressure transships, pressure oil, through first damping hole the 1, second damping hole 2, arrives
Reach the position between poppet valve core and conical valve base, now in the shoulder hole in conical valve base, be full of pressure oil.Oil of pressure oil at this
Pressure overload and reach overload valve set pressure (degree that this set pressure is compressed to cone valve spring is relevant, can be by pressure regulation spiral shell
Nail adjusts.) time, pressure oil acts on poppet valve core, promotes poppet valve core upwards to move, and makes to be separated between poppet valve core and conical valve base,
Make to be connected between the stairstepping inner chamber of conical valve base and the first oil back chamber, so that pressure oil passes sequentially through the first oil return
Chamber, the second oil back chamber return to overload valve oil return inlet T 3, and then return among the oil sump tank of outside.When described overload valve is installed on institute
When stating overload valve intracavity, described overload valve oil return inlet T 3 is connected with the oil return inlet T of valve body；Now, described second oil back chamber with
Communicate between overload valve oil return inlet T 3.Therefore, the inner chamber of main valve plug upper end communicates with oil return, the pressure of main valve plug upper end
Less than the pressure at the overload valve pressure port below main valve plug, main valve plug is pushed up by pressure oil, makes overload valve pressure port and returns
Hydraulic fluid port T-phase is led to, thus can be the unloading of P2 mouth, it is ensured that security of system.
Second piston chamber the 28, second unidirectional valve pocket 29 and the second logic valve pocket 30 it is provided with in described valve body 1, described second
It is connected by the 7th oil duct 14 between piston chamber 28 and the second logic valve pocket 30；Described second piston chamber 28 and the second check valve
It is connected by the 4th oil duct 11 between chamber 29；
It is provided with in described second unidirectional valve pocket 29 for controlling leading between the second unidirectional valve pocket 29 and the 4th oil duct 11
The second disconnected check valve 3, described second check valve 3 includes that second nonreturn valve core the 301, second one-way valve spring 302 and second is single
To valve plug screw 303；Described second unidirectional valve pocket 29 is isolated into the second check valve upper cavity 2901 by described second nonreturn valve core 301
With the second check valve lower chamber 2902, described second check valve upper cavity 2901 is connected with the first pressure port P1；When second is single
When spool 301 moves down, described 4th oil duct 11 is by described second check valve upper cavity 2901 and described first pressure
Mouth P1 is connected；Described second check valve plug screw 303 is arranged in the outlet of described second unidirectional valve pocket 29, by the second check valve
Outlet below the second check valve lower chamber 2902 in chamber 29 is closed；It is single that described second one-way valve spring 302 is positioned at described second
To between spool 301 and the second check valve plug screw 303；
Described second logic valve pocket 30 is provided with for controlling leading between the second logic valve pocket 30 and the 7th oil duct 14
The second disconnected logical valve 21；Described second logical valve 21 includes second logic spool the 2101, second logical valve spring 2102 and
Two logical valve plug screws 2103；Described second logic valve pocket 30 is isolated into the second logical valve epicoele by described second logic spool 2101
Body 3001 and the second logical valve lower chamber 3002, described second logical valve upper cavity 3001 is by the internal galleries of pile-up valve and the
Two pressure port P2 are connected；When the second logic spool 2101 moves down, described 7th oil duct 14 is by described second logic
Valve upper cavity 3001 is connected with described second pressure port P2；Described second logical valve plug screw 2103 is arranged at described second logic
In the outlet of valve pocket 30, the outlet of the second logic valve pocket 30 is closed；Described second logical valve spring 2102 is positioned at described second
Between logic spool 2101 and the second logical valve plug screw 2103；Described second logical valve upper cavity 3001 is connected with the 5th oil duct 12
Logical, the second logical valve lower chamber 3002 is connected with the 6th oil duct 13；
Second logic control valve 31 includes second logic control valve body the 3101, second logic control spool 3102, second patrols
Collect control valve spring 3103, interface Pib2, interface T2；Described second logic control valve body 3101 is fixed on described valve body 1, the
The second logic control valve pocket 3104, described second logic control spool 3102, second it is provided with in two logic control valve bodies 3101
Logic control valve spring 3103 may be contained within described second logic control valve pocket 3104；Described second logic control valve pocket 3104
By respectively by the 5th logic control oil duct 3105 and the 6th logic control oil duct 3106 and described 5th oil duct 12 and the 6th
Oil duct 13 is connected；Described second logic control spool 3102 is used for controlling described 5th logic control oil duct 3105 and the 6th and patrols
Collect the break-make controlled between oil duct 3106；Described interface Pib2 controls oil Pi2 by outside oil circuit with excavator and is connected；Described
Interface T2 is connected with oil return inlet T；
Described second piston chamber 28 is arranged at the second guiding valve 25；Second guiding valve 25 includes that the second slide valve lever 2501, second is sliding
Valve spring the 2502, second left sealing cap 2503 and the second right aling cap 2504；It is sliding that described second slide valve lever 2501 is inserted in described second
In valve pocket 28, the two ends, left and right of described second piston chamber 28 are respectively by described second left sealing cap 2503 and the second right aling cap 2504 envelope
Close, thus within described second slide valve lever 2501 is closed in described valve body 1；Described second slide valve spring 2502 is positioned at described
In the inner chamber of two left sealing caps 2503, reset to the right after being used for being moved to the left so that the second slide valve lever 2501；Described second slide valve lever
The right-hand member of 2501 is inserted in the inner chamber of described second right aling cap 2504, and the inner chamber of described second right aling cap 2504 passes through interface
Pia2 controls oil Pi2 and is connected with excavator.
As it is shown in figure 5, when controlling oil Pi2 and providing pressure oil, when pressure reaches 0.5MPa, i.e. Pia2 pressure reaches
0.5MPa, the second logic control spool of the second logical valve control valve is pushed to move down, and the second logic control spool flows the 5th
Road and the 6th runner cut off, and are connected with oil return T by the 6th runner, and the second logical valve lower chamber 3002 of the i.e. second logical valve is pressed
Power is 0, and the second logical valve is pressed to move down by P2 mouth (P2, P3, P4 are parallel interfaces, receive the memorizer that recovers energy) pressure oil,
Second logic spool of the second logical valve moves down so that the second logical valve is opened, and makes P2 mouth by the second logical valve upper cavity 3001
It is connected with the 7th runner.When Pi2 pressure is more than 0.7MPa, i.e. Pia2 pressure is more than 0.7MPa, and the second guiding valve is pushed to a left side, makes
7th runner and the 4th runner communicate, and pressure current stores device 23 through P2 mouth to the 7th runner from external energy, then to the 4th stream
Road, the second check valve pushed open between P2 and P1 enters into P1 mouth, makes the energy of recovery again discharge in the big arm cylinder making digging machine
Rise, it is achieved thereby that the recycling recovered energy, saved the energy, improve the environmental-protecting performance of excavator work.
The ultimate principle of the present invention, principal character and advantages of the present invention have more than been shown and described.The technology of the industry
The personnel simply present invention it should be appreciated that the present invention is not restricted to the described embodiments, described in above-described embodiment and description
Principle, the present invention also has various changes and modifications without departing from the spirit and scope of the present invention, these change and
Improvement both falls within the range of claimed invention.The protection domain of application claims by appending claims and
Equivalent defines.
Claims (3)
1. it is used for excavator energy regenerating and there is a pile-up valve for antioverloading function, it is characterized in that, including valve body (1), institute
State and on valve body (1), be provided with the first hydraulic fluid port A1, the first pressure port P1, the second pressure port P2, the 3rd pressure port P3；Described first oil
Mouth A1 is connected with described second pressure port P2 by the first of pile-up valve the outside oil circuit (22), sets at described second pressure port P2
It is equipped with first check valve (2) so that the hydraulic oil at described first hydraulic fluid port A1 can be through described outside oil circuit single flow direction
Described second pressure port P2；Also set on pile-up valve internal oil passages between described first pressure port P1 and described second pressure port P2
Put second check valve (3) so that the hydraulic oil when energy discharges is merely able to from the second pressure port P2 single flow direction
One pressure port P1；
Described first pressure port P1 is connected with oil cylinder of big arm of digger (4), and described first pressure port P1 supplies to big arm cylinder (4)
During oil, large arm rises, and during described first pressure port P1 oil return, large arm declines；Described second pressure port P2 inside by pile-up valve
Oil circuit is connected with described 3rd pressure port P3, and described 3rd pressure port P3 and external energy storage device (23) are connected
Connect；
The first piston chamber (5) and the first logic valve pocket (6), described first piston chamber (5) and first it is provided with in described valve body (1)
It is connected by the first oil duct (8) between logic valve pocket (6)；The described first logic valve pocket (6) internal galleries by pile-up valve
Being connected with described first pressure port P1, described first logical valve (20) is arranged in described first logic valve pocket (6), is used for controlling
Make the break-make between described first pressure port P1 and described first oil duct (8)；First logical valve (20) includes the first logic spool
(2001) and the first logical valve spring (2002)；First logic spool (2001) is arranged in described first logic valve pocket (6), the
One logical valve spring (2002) is located at described first logic spool (2001) lower section, described first logical valve spring (2002) lower section
Closed by a plug screw；
Described first logic valve pocket (6) also by the second oil duct (9) and the 3rd oil duct (10) be arranged at valve body (1) first outward
Logic control valve (7) is connected；Described first logic control valve (7) includes the first logic control valve body (701), the first logic control
Spool processed (702), the first logic control valve spring (703), interface Pib1, interface T1；Described first logic control valve body (701)
It is fixed on described valve body (1), in the first logic control valve body (701), is provided with the first logic control valve pocket (704), described
One logic control spool (702), the first logic control valve spring (703) may be contained within described first logic control valve pocket (704)
In, described first logic control valve pocket (704) is by respectively by the second logic control oil duct (705) and the 3rd logic control oil
Road (706) is connected with described second oil duct (9) and the 3rd oil duct (10)；Described first logic control spool (702) is used for controlling
Make the break-make between described second logic control oil duct (705) and the 3rd logic control oil duct (706)；Described interface Pib1 passes through
Outside oil circuit controls oil Pi1 and is connected with excavator；Described interface T1 is connected with oil return inlet T；
It is provided with the first guiding valve (24) in described first piston chamber (5)；Described first guiding valve (24) includes the first slide valve lever
(2401), the first slide valve spring (2402), the first left sealing cap (2403) and the first right aling cap (2404)；Described first slide valve lever
(2401) being inserted in described first piston chamber (5), the two ends, left and right of described first piston chamber (5) are respectively by described first left envelope
Lid (2403) and the first right aling cap (2404) closing, thus described first slide valve lever (2401) is closed in described valve body (1) it
In；Described first slide valve spring (2402) is positioned in the inner chamber of described first left sealing cap (2403), is used for so that the first slide valve lever
(2401) reset to the right after being moved to the left；The right-hand member of described first slide valve lever (2401) is inserted into described first right aling cap (2404)
Inner chamber in, the inner chamber of described first right aling cap (2404) controls oil Pi1 by interface Pia1 and excavator and is connected；
It is provided with overload valve pocket (26) in described valve body (1), in described overload valve pocket (26), is provided with an overload valve
(27)；Described overload valve pocket (26) is connected with the internal oil passages between described 3rd pressure port P3 and described second pressure port P2
Logical, described overload valve pocket (26) is also connected with oil return inlet T, described overload valve (27) control described 3rd pressure port P3 and institute
State the internal oil passages between the second pressure port P2 and the break-make between described oil return inlet T；
A second hydraulic fluid port A2 it is additionally provided with on described valve body (1).
The most according to claim 1 a kind of for excavator energy regenerating and the pile-up valve with antioverloading function, it is special
Levy and be, described overload valve (27) include main valve housing (2701), main valve plug (2702), main spool spring (2703), conical valve base (2704),
Poppet valve core (2705), cone valve spring (2706), sleeve pipe (17) and pressure regulating screw (16)；
Described main valve housing (2701) lower end is provided with overload valve pressure port (2707), and described overload valve pressure port (2707) is with described
It is connected between second pressure port P2；The inner chamber of described main valve housing (2701) is provided with main valve plug (2702) and conical valve base
(2704), described conical valve base (2704) is positioned at the top of described main valve plug (2702)；On the outer peripheral face of described main valve housing (2701)
Being provided with overload valve oil return inlet T 3, described overload valve oil return inlet T 3 is positioned at main valve plug with described main valve housing (2701) inner chamber
(2702) the part cavity of lower section communicates；
Described main valve plug (2702) top is provided with main valve plug groove (2708), and the lower section of described main valve plug groove (2708) is offered
Having the first damping hole (2709), described first damping hole (2709) axially penetrates through described main valve along described main valve plug (2702)
Core (2702), by described first damping hole between described main valve plug groove (2708) and described overload valve pressure port (2707)
(2709) it is connected；The lower end of described main spool spring (2703) be positioned at described main valve plug groove (2708) and with described main valve plug
The bottom land of groove (2708) abuts against, and the upper end of described main spool spring (2703) offsets with the lower surface of described conical valve base (2704)
Connect；Axially penetrating through in described conical valve base (2704) along described conical valve base (2704) it is arranged in described conical valve base (2704)
Shoulder hole (2711), within described shoulder hole (2711) epimere is inserted in the lower end of described poppet valve core (2705), described shoulder hole
(2711) hypomere is the second damping hole (2710), and described shoulder hole (2711) passes through described second damping hole (2710) and cone valve
Main valve housing (2701) inner chamber of core (2705) lower section is connected with described main valve plug groove (2708)；Described sleeve pipe (17) is sheathed on
On the outer peripheral face of the epimere of described main valve housing (2701), at the outer peripheral face of described sleeve pipe (17) inwall Yu described main valve housing (2701)
Between be formed with the first oil back chamber (2712) and the second oil back chamber (2713)；The upper end of described poppet valve core (2705) is positioned at described set
In the inner chamber of pipe (17), it is provided with cone valve spring (2706) on described poppet valve core (2705), under described pressure regulating screw (16)
End is threaded in the inner chamber epimere of described sleeve pipe (17), the upper end of described cone valve spring (2706) and described pressure regulating screw
(16) lower end abuts against；Described first oil back chamber (2712) and the intracavity inter-connection of described sleeve pipe (17), described second oil return
Chamber (2713) is connected with described overload valve oil return inlet T 3；Described overload valve oil return inlet T 3 is connected with the oil return inlet T of valve body (1)
Logical.
The most according to claim 2 a kind of for excavator energy regenerating and the pile-up valve with antioverloading function, it is special
Levy and be, the top of described sleeve pipe (17) is provided with a nut (15), described nut (15) and described pressure regulating screw (16) it
Between be connected in the way of threaded engagement；Stairstepping sealing ring (19) it is provided with between described nut and described sleeve pipe (17).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410410117.7A CN104196796B (en) | 2014-08-19 | 2014-08-19 | A kind of for excavator energy regenerating and the pile-up valve with antioverloading function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410410117.7A CN104196796B (en) | 2014-08-19 | 2014-08-19 | A kind of for excavator energy regenerating and the pile-up valve with antioverloading function |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104196796A CN104196796A (en) | 2014-12-10 |
| CN104196796B true CN104196796B (en) | 2016-09-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410410117.7A Active CN104196796B (en) | 2014-08-19 | 2014-08-19 | A kind of for excavator energy regenerating and the pile-up valve with antioverloading function |
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Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3481364A (en) * | 1967-11-30 | 1969-12-02 | Commercial Shearing | Hydraulic valves |
| JP2008002663A (en) * | 2006-06-26 | 2008-01-10 | Hitachi Constr Mach Co Ltd | Spool valve device |
| CN201368079Y (en) * | 2009-03-13 | 2009-12-23 | 湖州生力液压有限公司 | Lifting and steering hydraulic-pressure pile-up valve convenient for manual control |
| CN202381432U (en) * | 2011-12-22 | 2012-08-15 | 徐州重型机械有限公司 | Leveling overload valve and aerial work platform |
| CN203348201U (en) * | 2013-06-28 | 2013-12-18 | 山河智能装备股份有限公司 | Energy recycling hydraulic control valve |
| CN204041606U (en) * | 2014-08-19 | 2014-12-24 | 合肥长源液压股份有限公司 | A kind of be used for excavator energy regenerating and recycling and can antioverloading integrated valve |
| CN203978983U (en) * | 2014-08-19 | 2014-12-03 | 合肥长源液压股份有限公司 | A kind of integrated valve that reclaims and have antioverloading function for excavator energy |
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2014
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