CN104196809A - Pile-up valve for recovering and reusing energy of excavator - Google Patents
Pile-up valve for recovering and reusing energy of excavator Download PDFInfo
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- CN104196809A CN104196809A CN201410410142.5A CN201410410142A CN104196809A CN 104196809 A CN104196809 A CN 104196809A CN 201410410142 A CN201410410142 A CN 201410410142A CN 104196809 A CN104196809 A CN 104196809A
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Abstract
The invention discloses a pile-up valve for recovering and reusing energy of an excavator. The pile-up valve comprises a valve body. A first oil port A1, a first pressure port P1, a second pressure port P2 and a third pressure port P3 are formed in the valve body. The first oil port A1 is communicated with the second pressure port P2 through a first external oil duct of the pile-up valve, and a first one-way valve is arranged on the second pressure port P2. A second one-way valve is arranged on the portion, between the first pressure port P1 and the second pressure port P2, of an internal oil duct of the pile-up valve. A first slide valve, a first logic valve and a first logic control valve are arranged in the valve body. A second slide valve, the second one-way valve and a second logic valve are arranged in the valve body. The pile-up valve for recovering and reusing energy of the excavator has the advantages that energy generated in the descent process of a large arm of the excavator can be recovered, the recovered energy can be reused when the large arm of the excavator ascends, work reliability is good, and energy is saved.
Description
Technical field
The present invention relates to a kind of integrated valve, especially a kind of integrated valve that reclaims and recycle for excavator energy.
Background technique
Excavator, claims again excavation machinery (excavating machinery), is to excavate higher or lower than the material that holds machine side with scraper bowl, and packs haulage vehicle into or unload the earth moving machinery to stocking yard.The material that excavator excavates is mainly soil, coal, silt and the Soil and Rock after pre-pine.From the development of engineering machinery in recent years, the development of excavator is relatively very fast, and excavator has become one of topmost engineering machinery in engineering construction.What excavator now accounted for the overwhelming majority is all-hydraulic all-rotation excavator.The Hydraulic Power Transmission System of excavator by oil hydraulic pump by the transmission of power of motor to executive components such as oil hydraulic motor, oil hydraulic cylinders, the device action that pushes the work forward, thus complete various operations.
In the course of the work, its large arm is frequent to decline and rises excavator.In the working procedure of excavator, having a kind of situation is not need consumption of engine power, when large arm falls from high to low.In the process declining at big arm of digger, its potential energy is also by reducing greatly, and these energy have also been wasted.At present, on excavator, there is no and be equipped with special energy recycle device.
Application number is that the Chinese utility model patent of CN201320587141.9 discloses a kind of big arm of digger energy regenerating device with potential energy recovery device, comprise large arm and the master cylinder that is fixed on large arm both sides, master cylinder is communicated with fuel tank by solenoid valve group, between described large arm and frame, be hinged with fluid force-transmitting mechanism, fluid force-transmitting mechanism is between two master cylinders, fluid force-transmitting mechanism connects accumulator by pipeline, the hidden inside that is fixed on large arm of accumulator.Although this model utility is introduced the energy-recuperation system of excavator, the introduction of the special valve not reclaiming relevant for excavator energy.
Summary of the invention
The present invention is the deficiency existing in above-mentioned prior art for avoiding, providing a kind of reclaims and the integrated valve recycling for excavator energy, so that the gravitational potential energy of big arm of digger while declining reclaims, and in large arm uphill process, discharges and utilizes recovery potential energy, make excavator more energy-conservation when working.
The present invention be technical solution problem by the following technical solutions.
For excavator energy, reclaim the integrated valve with recycling, its structural feature is, comprises 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 on described valve body; Described the first hydraulic fluid port A1 is connected with described the second pressure port P2 by the first outside oil circuit of integrated valve, described the second pressure port P2 place is provided with first one-way valve, makes the hydraulic oil at described the first hydraulic fluid port A1 place can be through the second pressure port P2 described in described outside oil circuit single flow direction; On integrated valve internal oil passages between described the first pressure port P1 and described the second pressure port P2, be also provided with second one-way valve, the hydraulic oil when energy discharges is merely able to from second pressure port P2 single flow direction the first pressure port P1;
Described the first pressure port P1 is connected with oil cylinder of big arm of digger, described the first pressure port P1 during to big arm cylinder fuel feeding large arm rise, during described the first pressure port P1 oil return, large arm declines; Described the second pressure port P2 is connected with described the 3rd pressure port P3 by the internal oil passages of integrated valve, and described the 3rd pressure port P3 is connected with an external energy storage device;
In described valve body, be provided with the first piston chamber and the first logic valve pocket, between described the first piston chamber and the first logic valve pocket, by the first oil duct, be connected; Described the first logic valve pocket is connected with described the first pressure port P1 by the inside oil duct of integrated valve, and described the first logical valve is arranged in described the first logic valve pocket, for controlling the break-make between described the first pressure port P1 and described the first oil duct; The first logical valve comprises the first logic spool and the first logical valve spring; The first logic spool is arranged in described the first logic valve pocket, and the first logical valve spring is located at described the first logic spool below, and described the first logical valve spring below is sealed by a plug screw;
Described the first logic valve pocket is also connected with the first logic control valve being arranged at outside valve body with the 3rd oil duct by the second oil duct; Described the first logic control valve comprises the first logic control valve body, the first logic control spool, the first logic control valve spring, interface Pib1, interface T1; Described the first logic control valve body is fixed on described valve body, in the first logic control valve body, be provided with the first logic control valve pocket, described the first logic control spool, the first logic control valve spring are all arranged in described the first logic control valve pocket, and described the first logic control valve pocket is by being connected with described the second oil duct and the 3rd oil duct by the second logic control oil duct and the 3rd logic control oil duct respectively; Described the first logic control spool is for controlling the break-make between described the second logic control oil duct and the 3rd logic control oil duct; Described interface Pib1 controls oily Pi1 by outside oil circuit and excavator and is connected; Described interface T1 is connected with oil return inlet T;
In described the first piston chamber, be provided with the first guiding valve; Described the first guiding valve comprises the first slide valve lever, the first slide valve spring, the first left sealing cap and the first right aling cap; Described the first slide valve lever is inserted in described the first piston chamber, and the two ends, left and right of described the first piston chamber are sealed by described the first left sealing cap and the first right aling cap respectively, thereby within described the first slide valve lever is closed in to described valve body; Described the first slide valve spring is arranged in the inner chamber of described the first left sealing cap, for resetting to the right after the first slide valve lever is moved to the left; The right-hand member of described the first slide valve lever is inserted in the inner chamber of described the first right aling cap, and the inner chamber of described the first right aling cap is controlled oily Pi1 by interface Pia1 with excavator and is connected;
In described valve body, be provided with the second piston chamber, the second unidirectional valve pocket and the second logic valve pocket, between described the second piston chamber and the second logic valve pocket, by the 7th oil duct, be connected; Between described the second piston chamber and the second unidirectional valve pocket, by the 4th oil duct, be connected;
Described the second piston chamber is arranged at the second guiding valve; In described the second unidirectional valve pocket, be provided with for controlling the second one-way valve of the break-make between the second unidirectional valve pocket and the 4th oil duct; In described the second logic valve pocket, be provided with for controlling the second logical valve of the break-make between the second logic valve pocket and the 7th oil duct.
The structural feature of a kind of integrated valve that reclaims and recycle for excavator energy of the present invention is also:
Described the second one-way valve comprises the second nonreturn valve core, the second check valve spring and the second one-way valve plug screw; Described the second nonreturn valve core is isolated into the second one-way valve upper cavity and the second one-way valve lower chamber by described the second unidirectional valve pocket, and described the second one-way valve upper cavity is connected with the first pressure port P1; When the second nonreturn valve core moves down, described the 4th oil duct is connected with described the first pressure port P1 by described the second one-way valve upper cavity; Described the second one-way valve plug screw is arranged in the outlet of described the second unidirectional valve pocket, by the outlet sealing of the second one-way valve lower chamber below of the second unidirectional valve pocket; Described the second check valve spring is between described the second nonreturn valve core and the second one-way valve plug screw.
Described the second logical valve comprises the second logic spool, the second logical valve spring and the second logical valve plug screw; Described the second logic spool is isolated into the second logical valve upper cavity and the second logical valve lower chamber by described the second logic valve pocket, and described the second logical valve upper cavity is connected with the second pressure port P2 by the inside oil duct of integrated valve; When the second logic spool moves down, described the 7th oil duct is connected with described the second pressure port P2 by described the second logical valve upper cavity; Described the second logical valve plug screw is arranged in the outlet of described the second logic valve pocket, by the outlet sealing of the second logic valve pocket; Described the second logical valve spring is between described the second logic spool and the second logical valve plug screw; Described the second logical valve upper cavity is connected with the 5th oil duct, and the second logical valve lower chamber is connected with the 6th oil duct;
The second logic control valve comprises the second logic control valve body, the second logic control spool, the second logic control valve spring, interface Pib2, interface T2; Described the second logic control valve body is fixed on described valve body, is provided with the second logic control valve pocket in the second logic control valve body, and described the second logic control spool, the second logic control valve spring are all arranged in described the second logic control valve pocket; Described the second logic control valve pocket is by being connected with described the 5th oil duct and the 6th oil duct by the 5th logic control oil duct and the 6th logic control oil duct respectively; Described the second logic control spool is for controlling the break-make between described the 5th logic control oil duct and the 6th logic control oil duct; Described interface Pib2 controls oily Pi2 by outside oil circuit and excavator and is connected; Described interface T2 is connected with oil return inlet T;
Described the second guiding valve comprises the second slide valve lever, the second slide valve spring, the second left sealing cap and the second right aling cap; Described the second slide valve lever is inserted in described the second piston chamber, and the two ends, left and right of described the second piston chamber are sealed by described the second left sealing cap and the second right aling cap respectively, thereby within described the second slide valve lever is closed in to described valve body; Described the second slide valve spring is arranged in the inner chamber of described the second left sealing cap, for resetting to the right after the second slide valve lever is moved to the left; The right-hand member of described the second slide valve lever is inserted in the inner chamber of described the second right aling cap, and the inner chamber of described the second right aling cap is controlled oily Pi2 by interface Pia2 with excavator and is connected.
On described valve body, be also provided with a second hydraulic fluid port A2.
Compared with the prior art, beneficial effect of the present invention is embodied in:
A kind of integrated valve that reclaims and recycle for excavator energy of the present invention, connects by the first piston chamber and the first oil duct by controlling the A1 mouth that makes of oil, thereby P1 mouth and A1 mouth are connected.A1 mouth connects outside energy conversion device, potential energy when oil cylinder is declined changes into high pressure oil and enters in integrated valve of the present invention by P2 mouth, by P3 mouth, enter external energy storage device again, thereby stored energy is got up, realize the object of the energy recovery that big arm of digger is declined.The first logical valve is located between the P1 mouth and A1 mouth of decline energy recovery oil circuit; Between the first logical valve and A1 mouth, be provided with the first guiding valve, by controlling oily pressure size, change the displacement of the first guiding valve, thereby change the openings of sizes between the first logical valve and A1 mouth, reach the flow while controlling the recovery of decline energy.
By controlling oil, the 5th runner and the 6th runner are cut off, and the 6th runner and oil return T are connected, the second logical valve lower chamber pressure of the second logical valve is 0, P2 mouth pressure oil presses to the second logical valve to move down, the second logic spool of the second logical valve moves down the second logical valve is opened, and P2 mouth is connected with the 7th runner by the second logical valve upper cavity.When Pi2 pressure is greater than 0.7MPa, be that Pia2 pressure is greater than 0.7MPa, the second guiding valve is pushed to a left side, the 7th runner is communicated with the 4th runner, pressure flow is from external energy storage device 23 through P2 mouth to the seven runners, then to the 4th runner, the second one-way valve of pushing open between P2 and P1 enters into P1 mouth, make the energy reclaiming again discharge the big arm cylinder rising that makes digging machine, thereby realized the recycling of recovered energy.
Between the second logical valve and P1 mouth, be provided with the second guiding valve, by controlling oily pressure size, change the displacement of guiding valve, thereby change the openings of sizes between the second logical valve and P1 mouth, reach the flow while controlling the release of rising energy.The second logical valve is located between the P2 mouth and P1 mouth that rising energy discharges oil circuit, and between P1 mouth and P2 mouth, increases by the second one-way valve and prevent the oily inflow of P1 mouth pressure P2 mouth.
Of the present inventionly a kind ofly for excavator energy, reclaim the integrated valve with recycling, the energy when thering is recyclable big arm of digger and declining, and can when big arm of digger rises, re-use the advantages such as energy, the functional reliability of recovery is good, energy saving.
Accompanying drawing explanation
Fig. 1 is the plan view of a kind of integrated valve that reclaims and recycle for excavator energy of the present invention.
Fig. 2 is the plan view of a kind of integrated valve that reclaims and recycle for excavator energy of the present invention.
Fig. 3 is the left view of a kind of integrated valve that reclaims and recycle for excavator energy of the present invention.
Fig. 4 is the hydraulic schematic diagram of a kind of integrated valve that reclaims and recycle for excavator energy of the present invention.
Fig. 5 is the A-A sectional view (sectional view of the second logical valve of the present invention, the second guiding valve and the second logic control valve) in Fig. 2.
Fig. 6 is the B-B sectional view (sectional view of the first logical valve of the present invention, the first guiding valve and the first logic control valve) in Fig. 2.
B-B sectional view when Fig. 7 is energy recovery in Fig. 2.
A-A sectional view when Fig. 8 is energy release in Fig. 2.
Fig. 9 is the partial view (overload valve does not transship, attonity) of the C-C sectional view in Fig. 3.
Figure 10 is the partial view (overload valve overload, overload valve action) of the C-C sectional view in Fig. 3.
Figure 11 is the structural drawing of the overload valve in Fig. 9 and 10.
Label in accompanying drawing 1～accompanying drawing 11: 1 valve body, 2 first one-way valves, 3 second one-way valves, 301 second nonreturn valve cores, 302 second check valve springs, 303 second one-way valve plug screws, 4 big arm cylinders, 5 first piston chambers, 6 first logic valve pockets, 7 first logic control valves, 701 first logic control valve bodies, 702 first logic control spools, 703 first logic control valve springs, 704 first logic control valve pockets, 705 second logic control oil ducts, 706 the 3rd logic control oil ducts, 8 first oil ducts, 9 second oil ducts, 10 the 3rd oil ducts, 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 sleeve pipes, 18 energy conversion devices, 19 stepped shaft seal rings, 20 first logical valves, 2001 first logic spools, 2002 first logical valve springs, 21 second logical valves, 2101 second logic spools, 2102 second logical valve springs, 2103 second logical valve plug screws, 22 first outside oil circuits, 23 external energy storage devices, 24 first guiding valves, 2401 first slide valve levers, 2402 first slide valve springs, 2403 first left sealing caps, 2404 first right aling caps, 25 second guiding valves, 2501 second slide valve levers, 2502 second slide valve springs, 2503 second left sealing caps, 2504 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, 2709 first damping holes, 2710 second damping holes, 2711 shoulder holes, 2712 first oil back chambers, 2713 second oil back chambers, 28 second piston chambers, 29 second unidirectional valve pockets, 2901 second one-way valve upper cavities, 2902 second one-way valve lower chambers, 30 second logic valve pockets, 3001 second logical valve upper cavities, 3002 second logical valve lower chambers, 31 second logic control valves, 3101 second logic control valve bodies, 3102 second logic control spools, 3103 second logic control valve springs, 3104 second logic control valve pockets, 3105 the 5th logic control oil ducts, 3105 the 6th logic control oil ducts.
Below pass through embodiment, and the invention will be further described by reference to the accompanying drawings.
Embodiment
Referring to accompanying drawing 1～accompanying drawing 11, a kind of integrated valve that reclaims and recycle for excavator energy of the present invention, comprises 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 port P3 on described valve body 1; Described the first hydraulic fluid port A1 is connected with described the second pressure port P2 by the first outside oil circuit 22 of integrated valve, described the second pressure port P2 place is provided with first one-way valve 2, makes the hydraulic oil at described the first hydraulic fluid port A1 place can be through the second pressure port P2 described in described outside oil circuit single flow direction; On integrated valve internal oil passages between described the first pressure port P1 and described the second pressure port P2, be also provided with second one-way valve 3, the hydraulic oil when energy discharges is merely able to from second pressure port P2 single flow direction the first pressure port P1;
Described the first pressure port P1 is connected with oil cylinder of big arm of digger 4, described the first pressure port P1 during to big arm cylinder 4 fuel feeding large arm rise, during described the first pressure port P1 oil return, large arm declines; Described the second pressure port P2 is connected with described the 3rd pressure port P3 by the internal oil passages of integrated valve, and described the 3rd pressure port P3 is connected with an external energy storage device 23;
In described valve body 1, be provided with the first piston chamber 5 and the first logic valve pocket 6, between described the first piston chamber 5 and the first logic valve pocket 6, by the first oil duct 8, be connected; Described the first logic valve pocket 6 is connected with described the first pressure port P1 by the inside oil duct of integrated valve, and described the first logical valve 20 is arranged in described the first logic valve pocket 6, for controlling the break-make between described the first pressure port P1 and described the first oil duct 8; The first logical valve 20 comprises the first logic spool 2001 and the first logical valve spring 2002; The first logic spool 2001 is arranged in described the first logic valve pocket 6, and the first logical valve spring 2002 is located at described the first logic spool 2001 belows, and described the first logical valve spring 2002 belows are sealed by a plug screw;
Described the first logic valve pocket 6 is also connected with the first logic control valve 7 being arranged at outside valve body 1 with the 3rd oil duct 10 by the second oil duct 9; Described the first logic control valve 7 comprises the first logic control valve body 701, the first logic control spool 702, the first logic control valve spring 703, interface Pib1, interface T1; Described the first logic control valve body 701 is fixed on described valve body 1, in the first logic control valve body 701, be provided with the first logic control valve pocket 704, described the first logic control spool 702, the first logic control valve spring 703 are all arranged in described the first logic control valve pocket 704, and described the first logic control valve pocket 704 is by being connected with described the second oil duct 9 and the 3rd oil duct 10 by the second logic control oil duct 705 and the 3rd logic control oil duct 706 respectively; Described the first logic control spool 702 is for controlling the break-make between described the second logic control oil duct 705 and the 3rd logic control oil duct 706; Described interface Pib1 controls oily Pi1 by outside oil circuit and excavator and is connected; Described interface T1 is connected with oil return inlet T;
In described the first piston chamber 5, be provided with the first guiding valve 24; Described the first guiding valve 24 comprises 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 the first slide valve lever 2401 is inserted in described the first piston chamber 5, and the two ends, left and right of described the first piston chamber 5 are sealed by described the first left sealing cap 2403 and the first right aling cap 2404 respectively, thereby within described the first slide valve lever 2401 is closed in to described valve body 1; Described the first slide valve spring 2402 is arranged in the inner chamber of described the first left sealing cap 2403, for resetting to the right after the first slide valve lever 2401 is moved to the left; The right-hand member of described the first slide valve lever 2401 is inserted in the inner chamber of described the first right aling cap 2404, and the inner chamber of described the first right aling cap 2404 is controlled oily Pi1 by interface Pia1 with excavator and is connected;
In described valve body 1, be provided with the unidirectional valve pocket 29 of the second piston chamber 28, second and the second logic valve pocket 30, between described the second piston chamber 28 and the second logic valve pocket 30, by the 7th oil duct 14, be connected; Between described the second piston chamber 28 and the second unidirectional valve pocket 29, by the 4th oil duct 11, be connected;
Described the second piston chamber 28 is arranged at the second guiding valve 25; In described the second unidirectional valve pocket 29, be provided with for controlling the second one-way valve 3 of the break-make between the second unidirectional valve pocket 29 and the 4th oil duct 11; In described the second logic valve pocket 30, be provided with for controlling the second logical valve 21 of the break-make between the second logic valve pocket 30 and the 7th oil duct 14.
Described the second one-way valve 3 comprises the second nonreturn valve core 301, the second check valve spring 302 and the second one-way valve plug screw 303; Described the second nonreturn valve core 301 is isolated into the second one-way valve upper cavity 2901 and the second one-way valve lower chamber 2902 by described the second unidirectional valve pocket 29, and described the second one-way valve upper cavity 2901 is connected with the first pressure port P1; When the second nonreturn valve core 301 moves down, described the 4th oil duct 11 is connected with described the first pressure port P1 by described the second one-way valve upper cavity 2901; Described the second one-way valve plug screw 303 is arranged in the outlet of described the second unidirectional valve pocket 29, by the outlet sealing of the second one-way valve lower chamber 2902 belows of the second unidirectional valve pocket 29; Described the second check valve spring 302 is between described the second nonreturn valve core 301 and the second one-way valve plug screw 303.
Described the second logical valve 21 comprises the second logic spool 2101, the second logical valve spring 2102 and the second logical valve plug screw 2103; Described the second logic spool 2101 is isolated into the second logical valve upper cavity 3001 and the second logical valve lower chamber 3002 by described the second logic valve pocket 30, and described the second logical valve upper cavity 3001 is connected with the second pressure port P2 by the inside oil duct of integrated valve; When the second logic spool 2101 moves down, described the 7th oil duct 14 is connected with described the second pressure port P2 by described the second logical valve upper cavity 3001; Described the second logical valve plug screw 2103 is arranged in the outlet of described the second logic valve pocket 30, by the outlet sealing of the second logic valve pocket 30; Described the second logical valve spring 2102 is between described the second logic spool 2101 and the second logical valve plug screw 2103; Described the second logical valve upper cavity 3001 is connected with the 5th oil duct 12, and the second logical valve lower chamber 3002 is connected with the 6th oil duct 13;
The second logic control valve 31 comprises the second logic control valve body 3101, the second logic control spool 3102, the second logic control valve spring 3103, interface Pib2, interface T2; Described the second logic control valve body 3101 is fixed on described valve body 1, in the second logic control valve body 3101, be provided with the second logic control valve pocket 3104, described the second logic control spool 3102, the second logic control valve spring 3103 are all arranged in described the second logic control valve pocket 3104; Described the second logic control valve pocket 3104 is by being connected with described the 5th oil duct 12 and the 6th oil duct 13 by the 5th logic control oil duct 3105 and the 6th logic control oil duct 3106 respectively; Described the second logic control spool 3102 is for controlling the break-make between described the 5th logic control oil duct 3105 and the 6th logic control oil duct 3106; Described interface Pib2 controls oily Pi2 by outside oil circuit and excavator and is connected; Described interface T2 is connected with oil return inlet T;
Described the second guiding valve 25 comprises the second slide valve lever 2501, the second slide valve spring 2502, the second left sealing cap 2503 and the second right aling cap 2504; Described the second slide valve lever 2501 is inserted in described the second piston chamber 28, and the two ends, left and right of described the second piston chamber 28 are sealed by described the second left sealing cap 2503 and the second right aling cap 2504 respectively, thereby within described the second slide valve lever 2501 is closed in to described valve body 1; Described the second slide valve spring 2502 is arranged in the inner chamber of described the second left sealing cap 2503, for resetting to the right after the second slide valve lever 2501 is moved to the left; The right-hand member of described the second slide valve lever 2501 is inserted in the inner chamber of described the second right aling cap 2504, and the inner chamber of described the second right aling cap 2504 is controlled oily Pi2 by interface Pia2 with excavator and is connected.
On described valve body 1, be also provided with a second hydraulic fluid port A2.A2 mouth is standby hydraulic fluid port, is in parallel with A1 mouth, and when work, A1 and A2 mouth are selected arbitrarily one, facilitate connecting pipeline, and another sealed in external is stifled to be closed.
If Fig. 1-3 are the outline drawing of a kind of integrated valve that reclaims and recycle for excavator energy of the present invention.In integrated valve, be also provided with the second logical valve and the second logic control valve, for the hydraulic oil that external energy storage device is reclaimed, reuse, for big arm of digger rises, provide the pressure energy.Fig. 4 is the hydraulic schematic diagram of integrated valve.Fig. 5 and Fig. 6 are respectively A-A sectional view and the B-B sectional view in Fig. 2, can find out respectively the internal structure of the first logical valve and the second logical valve.Oil return inlet T is the return opening of integrated valve, is connected with outside oil sump tank.Fig. 6 is the structural drawing of the first logical valve, the first guiding valve and the first logic control valve, the energy recovery function when being realized integrated valve the big arm cylinder of excavator is fallen by parts such as the first logical valve, the first guiding valve and the first logic control valves.Fig. 5 is the structural drawing of the second logical valve, the second guiding valve and the second logic control valve, while realizing the big arm cylinder rising of excavator by parts such as the second logical valve, the second guiding valve and the second logic control valves, the energy that reclaims storage is discharged again, help big arm cylinder to rise, thus energy saving.
Fig. 7 is the figure after the action of the first logical valve, the first guiding valve and the first logic control valve in Fig. 6 can reclaim time.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 are closed condition, noenergy release movement.
Figure after the action of the second logical valve, the second guiding valve and the second logic control valve when Fig. 8 is energy release in Fig. 5.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 are closed, and noenergy reclaims action.
Fig. 9 is in energy callback course, structural drawing when overload valve does not transship, and overload valve, in closed condition, moves without overload protection.Figure 10 is in energy callback course, structural drawing during overload valve overload, and overload valve, in open mode, has overload protection action.Figure 11 is the sectional view of the overload valve in Fig. 9 and 10.
The energy callback course of a kind of integrated valve that reclaims and recycle for excavator energy of the present invention is as follows.
In oil cylinder of big arm of digger decline process, from the B-B sectional view of Fig. 4 hydraulic schematic diagram and Fig. 6, interface Pia1 and Pib1 be by exterior line, be parallel to together with, connecting excavator is controlled oily Pi1.Pia2 and Pib2 be by exterior line, be parallel to together with, connecting excavator is controlled oily Pi2.When oil circuit control Pi1 provides pressure oil, oil cylinder of big arm of digger declines; When Pi2 provides pressure oil, oil cylinder of big arm of digger rises.When Pi1 provides pressure, when pressure reaches 0.5MPa, be that Pib1 reaches 0.5Mpa, the first logic control spool of the first logical valve control valve is pressed towards the first logic control valve spring, the first logic control spool cuts off the oil circuit between the second logic control oil duct 705 and the 3rd logic control oil duct 706, and the 3rd logic control oil duct 706 is connected by interface T1 and oil return inlet T; Now, the 3rd logic control oil duct 706 communicates with the 3rd oil duct 10.
The first logic valve pocket is divided into ante-chamber and two cavitys of back cavity by the first logic spool; What be positioned at the first logic spool top is ante-chamber, and what be positioned at the first logic spool below is back cavity; Wherein, this ante-chamber communicates with the first pressure port P1.Because the second oil duct 9 and the 3rd oil duct 10 are connected with the ante-chamber of the first logic spool top and the back cavity of below respectively, therefore the back cavity of the first logical 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.Between the ante-chamber of the first logic spool top and described the first oil duct, by described the first logic spool, cut off, when the first logic spool declines, ante-chamber and the first oil duct are connected.Because the back cavity of the first logical valve is communicated with return opening, the pressure that makes the back cavity of the first logical valve is 0, and the ante-chamber of the first logic spool top communicates with the first pressure port P1, P1 mouth high pressure oil is pressed the first logic spool downwards, the first logical valve is opened P1 mouth and the first oil duct are connected.
When the increase of Pi1 pressure is greater than 0.7MPa, Pia1 pressure is greater than 0.7Mpa, and Pia1 pressure oil promotes the first guiding valve and is moved to the left, and A1 mouth is connected by the first piston chamber and the first oil duct, thereby P1 mouth and A1 mouth are connected.As shown in Figure 6, owing to having increased by the second one-way valve between P1 mouth and P2 mouth, make P1 mouth oil directly by the 4th oil duct, enter P2 mouth, but P2 mouth oil can enter to enter P1 mouth by the 4th oil duct, provide energy release to make oil cylinder increase.Energy conversion device 18 is arranged between A1 mouth and P2 mouth.A1 mouth connects outside energy conversion device 18, potential energy when oil cylinder is declined changes into high pressure oil and enters in integrated valve of the present invention by P2 mouth, by P3 mouth, enter external energy storage device again, thereby stored energy is got up, realize the object of the energy recovery that big arm of digger is declined.
The first guiding valve of integrated valve of the present invention also has flow control function.Flow control process is as follows: when Pi1 pressure is greater than 0.7MPa, the first guiding valve is by after the first oil duct and the connection of A1 mouth, by controlling the pressure of Pi1, between 0.7MPa～3.5MPa, change, different pressures is realized the different thrusts to the first guiding valve, realize the first guiding valve in diverse location, thereby control the openings of sizes between the first oil duct and A1 mouth, final control is passed through the flow of opening to realize the flow control to A1 mouth to P1 mouth, reach and control oil cylinder rate of descent, big arm of digger can slowly be declined, and can not land suddenly and cause having an accident, improved the safety reliability of excavator work.
As shown in Figure 5, when the oily Pi2 of control provides pressure oil, when pressure reaches 0.5MPa, be that Pia2 pressure reaches 0.5MPa, the second logic control spool of the second logical valve control valve is pushed to and moves down, the second logic control spool cuts off the 5th runner and the 6th runner, and the 6th runner and oil return T are connected, the second logical valve lower chamber 3002 pressure of the second logical valve are 0, P2 mouth (P2, P3, P4 is parallel interface, receive recovered energy storage) pressure oil presses to the second logical valve to move down, the second logic spool of the second logical valve moves down the second logical valve is opened, P2 mouth is connected with the 7th runner by the second logical valve upper cavity 3001.When Pi2 pressure is greater than 0.7MPa, be that Pia2 pressure is greater than 0.7MPa, the second guiding valve is pushed to a left side, and the 7th runner is communicated with the 4th runner, pressure flow from external energy storage device 23 through P2 mouth to the seven runners, again to the 4th runner, the second one-way valve of pushing open between P2 and P1 enters into P1 mouth, makes the energy reclaiming again discharge the big arm cylinder rising that makes digging machine, thereby has realized the recycling of recovered energy, save the energy, improved the environmental-protecting performance of excavator work.
In described valve body 1, be provided with an overload valve pocket 26, in described overload valve pocket 26, be provided with an overload valve 27; Described overload valve pocket 26 is connected with the internal oil passages between described the second pressure port P2 with described the 3rd pressure port P3, described overload valve pocket 26 is also connected with oil return inlet T, by the internal oil passages between described overload valve 27 described the 3rd pressure port P3 of control and described the second pressure port P2 and the break-make between described oil return inlet T.When big arm of digger declines, gravitational potential energy is excessive, the high pressure oil pressure that energy conversion device 18 produces is excessive, may damage whole energy-recuperation system.So in decline process, once the high pressure oil pressure transforming surpasses overload valve setting pressure, when high pressure oil passes through P2 mouth to P3 mouth, the overload valve between P2 mouth and P3 mouth is opened, the pressure of high pressure oil is controlled at and is set in safety range, guarantee the safety of whole system.
Described overload valve 27 comprises 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 ends are provided with overload valve pressure port 2707, between described overload valve pressure port 2707 and described the second pressure port P2, are connected; In the inner chamber of described main valve housing 2701, be 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 circumferential face of described main valve housing 2701, be provided with overload valve oil return inlet T 3, described overload valve oil return inlet T 3 communicates with the part cavity that is positioned at main valve plug 2702 belows of described main valve housing 2701 inner chambers;
Described main valve plug 2702 tops are provided with main valve plug groove 2708, the below of described main valve plug groove 2708 offers the first damping hole 2709, described the first damping hole 2709 is along described main valve plug 2702 of axially running through of described main valve plug 2702, between described main valve plug groove 2708 and described overload valve pressure port 2707, by described the first damping hole 2709, is connected; The lower end of described main spool spring 2703 is positioned at described main valve plug groove 2708 and connects with the bottom land of described main valve plug groove 2708, and the lower end surface of the upper end of described main spool spring 2703 and described conical valve base 2704 connects; In described conical valve base 2704, be arranged at the axial shoulder hole 2711 through described conical valve base 2704 along described conical valve base 2704, within described shoulder hole 2711 epimeres are inserted in the lower end of described poppet valve core 2705, the hypomere of described shoulder hole 2711 is the second damping hole 2710, and described shoulder hole 2711 is connected with main valve housing 2701 inner chambers and the described main valve plug groove 2708 of poppet valve core 2705 belows by described the second damping hole 2710; Described sleeve pipe 17 is sheathed on the outer circumferential face of epimere of described main valve housing 2701, is formed with the first oil back chamber 2712 and the second oil back chamber 2713 between described sleeve pipe 17 inwalls and the outer circumferential face of described main valve housing 2701; The upper end of described poppet valve core 2705 is arranged in the inner chamber of described sleeve pipe 17, on described poppet valve core 2705, be provided with cone valve spring 2706, the lower end of described pressure regulating screw 16 is threaded in the inner chamber epimere of described sleeve pipe 17, and the lower end of the upper end of described cone valve spring 2706 and described pressure regulating screw 16 connects; The intracavity inter-connection of described the first oil back chamber 2712 and described sleeve pipe 17, described the second oil back 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.
Described overload valve, as Figure 11, comprises the parts such as main valve housing, main valve plug, main spool spring, conical valve base, poppet valve core, cone valve spring, sleeve pipe, nut and pressure regulating screw.The overload valve pressure port of main valve housing below is in parallel with the second pressure port P2, and overload valve oil return inlet T 3 is connected with the oil return inlet T of valve body.When P2 mouth pressure transships, pressure oil, through the first damping hole 1, the second damping hole 2, arrives the position between poppet valve core and conical valve base, now in the shoulder hole in conical valve base, is full of pressure oil.When the oil pressure overload of this place's pressure oil and reach overload valve set pressure (this set pressure is relevant to the compressed degree of cone valve spring, can be adjusted by pressure regulating screw.) time, pressure oil acts on poppet valve core, promoting poppet valve core upwards moves, make to be separated between poppet valve core and conical valve base, between the stepped shaft inner chamber that makes conical valve base and the first oil back chamber, be connected, thereby make pressure oil by the first oil back chamber, the second oil back chamber, get back to overload valve oil return inlet T 3 successively, and then get back among outside oil sump tank.In the time of in described overload valve is installed on described overload valve pocket, described overload valve oil return inlet T 3 is connected with the oil return inlet T of valve body; Now, between described the second oil back chamber and overload valve oil return inlet T 3, communicate.Therefore, in the inner chamber of main valve plug upper end, communicate with oil return, the pressure of main valve plug upper end is less than the pressure at the overload valve pressure port place of main valve plug below, main valve plug is upwards pushed away by pressure oil, overload valve pressure port is communicated with oil return inlet T, thereby can be the unloading of P2 mouth, guarantee security of system.
On the top of described sleeve pipe 17, be provided with a nut 15, the mode with screw-thread fit between described nut 15 and described pressure regulating screw 16 is connected; Between described nut and described sleeve pipe 17, be provided with stepped shaft seal ring 19.
More than show and described basic principle of the present invention, major character and advantage of the present invention.The technician of the industry should understand; the present invention is not restricted to the described embodiments; what in above-described embodiment and specification, describe is principle of the present invention; the present invention also has various changes and modifications without departing from the spirit and scope of the present invention, and these changes and improvements all fall in claimed scope of the present invention.The protection domain that the present invention requires is defined by appending claims and equivalent thereof.
Claims (5)
1. for excavator energy, reclaim and the integrated valve recycling, it is characterized in that, comprise valve body (1), on described 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 the first hydraulic fluid port A1 is connected with described the second pressure port P2 by the first outside oil circuit (22) of integrated valve, described the second pressure port P2 place is provided with first one-way valve (2), makes the hydraulic oil at described the first hydraulic fluid port A1 place can be through the second pressure port P2 described in described outside oil circuit single flow direction; On integrated valve internal oil passages between described the first pressure port P1 and described the second pressure port P2, be also provided with second one-way valve (3), the hydraulic oil when energy discharges is merely able to from second pressure port P2 single flow direction the first pressure port P1;
Described the first pressure port P1 is connected with oil cylinder of big arm of digger (4), described the first pressure port P1 during to big arm cylinder (4) fuel feeding large arm rise, during described the first pressure port P1 oil return, large arm declines; Described the second pressure port P2 is connected with described the 3rd pressure port P3 by the internal oil passages of integrated valve, and described the 3rd pressure port P3 is connected with an external energy storage device (23);
In described valve body (1), be provided with the first piston chamber (5) and the first logic valve pocket (6), between described the first piston chamber (5) and the first logic valve pocket (6), by the first oil duct (8), be connected; Described the first logic valve pocket (6) is connected with described the first pressure port P1 by the inside oil duct of integrated valve, described the first logical valve (20) is arranged in described the first logic valve pocket (6), for controlling the break-make between described the first pressure port P1 and described the first oil duct (8); The first logical valve (20) comprises the first logic spool (2001) and the first logical valve spring (2002); The first logic spool (2001) is arranged in described the first logic valve pocket (6), the first logical valve spring (2002) is located at described the first logic spool (2001) below, and described the first logical valve spring (2002) below is sealed by a plug screw;
Described the first logic valve pocket (6) is also connected with the 3rd oil duct (10) the first logic control valve (7) outer with being arranged at valve body (1) by the second oil duct (9); Described the first logic control valve (7) comprises the first logic control valve body (701), the first logic control spool (702), the first logic control valve spring (703), interface Pib1, interface T1; Described the first logic control valve body (701) is fixed on described valve body (1), in the first logic control valve body (701), be provided with the first logic control valve pocket (704), described the first logic control spool (702), the first logic control valve spring (703) are all arranged in described the first logic control valve pocket (704), and described the first logic control valve pocket (704) is by being connected with described the second oil duct (9) and the 3rd oil duct (10) by the second logic control oil duct (705) and the 3rd logic control oil duct (706) respectively; Described the first logic control spool (702) is for controlling the break-make between described the second logic control oil duct (705) and the 3rd logic control oil duct (706); Described interface Pib1 controls oily Pi1 by outside oil circuit and excavator and is connected; Described interface T1 is connected with oil return inlet T;
In described the first piston chamber (5), be provided with the first guiding valve (24); Described the first guiding valve (24) comprises 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 the first slide valve lever (2401) is inserted in described the first piston chamber (5), the two ends, left and right of described the first piston chamber (5) are sealed by described the first left sealing cap (2403) and the first right aling cap (2404) respectively, thereby within described the first slide valve lever (2401) is closed in to described valve body (1); Described the first slide valve spring (2402) is arranged in the inner chamber of described the first left sealing cap (2403), for resetting to the right after the first slide valve lever (2401) is moved to the left; The right-hand member of described the first slide valve lever (2401) is inserted in the inner chamber of described the first right aling cap (2404), and the inner chamber of described the first right aling cap (2404) is controlled oily Pi1 by interface Pia1 with excavator and is connected.
In described valve body (1), be provided with the second piston chamber (28), the second unidirectional valve pocket (29) and the second logic valve pocket (30), between described the second piston chamber (28) and the second logic valve pocket (30), by the 7th oil duct (14), be connected; Between described the second piston chamber (28) and the second unidirectional valve pocket (29), by the 4th oil duct (11), be connected.
Described the second piston chamber (28) is arranged at the second guiding valve (25); In described the second unidirectional valve pocket (29), be provided with for controlling second one-way valve (3) of the break-make between the second unidirectional valve pocket (29) and the 4th oil duct (11); In described the second logic valve pocket (30), be provided with for controlling second logical valve (21) of the break-make between the second logic valve pocket (30) and the 7th oil duct (14).
2. according to claim 1 a kind of for the recovery of excavator energy and the integrated valve recycling, it is characterized in that, described two one-way valves (3) comprise the second nonreturn valve core (301), the second check valve spring (302) and the second one-way valve plug screw (303); Described the second nonreturn valve core (301) is isolated into the second one-way valve upper cavity (2901) and the second one-way valve lower chamber (2902) by described the second unidirectional valve pocket (29), and described the second one-way valve upper cavity (2901) is connected with the first pressure port P1; When the second nonreturn valve core (301) moves down, described the 4th oil duct (11) is connected with described the first pressure port P1 by described the second one-way valve upper cavity (2901); Described the second one-way valve plug screw (303) is arranged in the outlet of described the second unidirectional valve pocket (29), by the outlet sealing of the second one-way valve lower chamber (2902) below of the second unidirectional valve pocket (29); Described the second check valve spring (302) is positioned between described the second nonreturn valve core (301) and the second one-way valve plug screw (303).
3. according to a kind of integrated valve that reclaims and recycle for excavator energy described in claim 1 and 2, it is characterized in that, described two logical valves (21) comprise the second logic spool (2101), the second logical valve spring (2102) and the second logical valve plug screw (2103); Described the second logic spool (2101) is isolated into the second logical valve upper cavity (3001) and the second logical valve lower chamber (3002) by described the second logic valve pocket (30), and described the second logical valve upper cavity (3001) is connected with the second pressure port P2 by the inside oil duct of integrated valve; When the second logic spool (2101) moves down, described the 7th oil duct (14) is connected with described the second pressure port P2 by described the second logical valve upper cavity (3001); Described the second logical valve plug screw (2103) is arranged in the outlet of described the second logic valve pocket (30), by the outlet sealing of the second logic valve pocket (30); Described the second logical valve spring (2102) is positioned between described the second logic spool (2101) and the second logical valve plug screw (2103); Described the second logical valve upper cavity (3001) is connected with the 5th oil duct (12), and the second logical valve lower chamber (3002) is connected with the 6th oil duct (13);
The second logic control valve (31) comprises the second logic control valve body (3101), the second logic control spool (3102), the second logic control valve spring (3103), interface Pib2, interface T2; Described the second logic control valve body (3101) is fixed on described valve body (1), in the second logic control valve body (3101), be provided with the second logic control valve pocket (3104), described the second logic control spool (3102), the second logic control valve spring (3103) are all arranged in described the second logic control valve pocket (3104); Described the second logic control valve pocket (3104) is by being connected with described the 5th oil duct (12) and the 6th oil duct (13) by the 5th logic control oil duct (3105) and the 6th logic control oil duct (3106) respectively; Described the second logic control spool (3102) is for controlling the break-make between described the 5th logic control oil duct (3105) and the 6th logic control oil duct (3106); Described interface Pib2 controls oily Pi2 by outside oil circuit and excavator and is connected; Described interface T2 is connected with oil return inlet T.
4. according to a kind of integrated valve that reclaims and recycle for excavator energy described in claim 1 and 2, it is characterized in that, described the second guiding valve (25) comprises the second slide valve lever (2501), the second slide valve spring (2502), the second left sealing cap (2503) and the second right aling cap (2504); Described the second slide valve lever (2501) is inserted in described the second piston chamber (28), the two ends, left and right of described the second piston chamber (28) are sealed by described the second left sealing cap (2503) and the second right aling cap (2504) respectively, thereby within described the second slide valve lever (2501) is closed in to described valve body (1); Described the second slide valve spring (2502) is arranged in the inner chamber of described the second left sealing cap (2503), for resetting to the right after the second slide valve lever (2501) is moved to the left; The right-hand member of described the second slide valve lever (2501) is inserted in the inner chamber of described the second right aling cap (2504), and the inner chamber of described the second right aling cap (2504) is controlled oily Pi2 by interface Pia2 with excavator and is connected.
5. a kind of integrated valve that reclaims and recycle for excavator energy according to claim 1, is characterized in that, is also provided with a second hydraulic fluid port A2 on described valve block body (1).
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| CN201410410142.5A CN104196809B (en) | 2014-08-19 | 2014-08-19 | A kind of pile-up valve for excavator energy regenerating Yu recycling |
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