CN204898749U - Excavator hydraulic system with energy repayment function - Google Patents
Excavator hydraulic system with energy repayment function Download PDFInfo
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- CN204898749U CN204898749U CN201520357528.4U CN201520357528U CN204898749U CN 204898749 U CN204898749 U CN 204898749U CN 201520357528 U CN201520357528 U CN 201520357528U CN 204898749 U CN204898749 U CN 204898749U
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Abstract
The utility model discloses an excavator hydraulic system with energy repayment function, including system's main pump, main execute component: walking motor, gyration motor, boom cylinder, arm cylinder and bucket cylinder and be applied to control execute component's the multiple unit valve of action mutually. Hydraulic system inserts energy repayment module, energy repayment module has contained two sub - module submodule pieces I, submodule piece II, the utility model discloses to hydraulic system, especially to providing a neotype hydraulic means in the aspect of the motion of automobile body and operation device, the timing control that throttles, the device can install the excavator system and be independent of the excavator system as the module, forms a new independent energy repayment operation mode. The mode is according to the load and the speed conditions of demand of load, can the automatic adjustment operating point, and furthest has retrieved useless energy to automatic feedback is to the hydraulic system in, and the module commonality is strong.
Description
Technical field
The utility model relates to engineering machinery, particularly be hydraulic crawler excavator Energy Recovery Technology.
Background technology
Excavator is the important machine of engineering machinery, is widely used in nation-building engineering, and excavator generally adopts diesel engine to be a power, drives executing agency's walking operation by hydraulic system.Ordinary excavator is that cycle operation is mechanical, load working condition is changeable, longevity of service, and working load weight, consume mass energy, but efficiency is very low.
The excavator hydraulic system of different manufacturers and model is changeable, and how the hydraulic system regardless of excavator changes, and the main executive component of hydraulic system formed by running motor, rotary motor, boom cylinder, bucket arm cylinder and bucket cylinder.Illustrate the utility model how to realize energy feedback for the hydraulic system of Fig. 1:
The excavator system not accessing energy feedback module, as Fig. 1, it comprises main pump I 1, main pump II 2, fuel tank 3, motor 4, running motor 5, boom cylinder 6, bucket cylinder 7, bucket arm cylinder 8, rotary motor 9, banked direction control valves (10-14), safety valve 15, overflow valve 16, one way valve 17.Its operating principle is, be motive power by motor, drive two hydraulic pressure main pumps (excavator hydraulic pressure main pump is generally 2), for hydraulic system fuel feeding, executive component has running motor 5 boom cylinder 6 bucket cylinder 7 bucket arm cylinder 8 rotary motor 9, for driving device walking and operation, banked direction control valves is for controlling the action of executive component.At the oil inlet and outlet of each executive component, a pair overflow valve 16 is installed, a pair one way valve 17.Protection executive component when wherein overflow valve 16 has a pressure oscillation for executive component.Repairing when one way valve 17 is for preventing executive component from inhaling empty.The exit of this external main pump has been installed safety valve 15 and has been protected whole hydraulic system.
The engine output Effective power that roughly only has about 20% to become excavator according to statistics.All the other have all been depleted to each link from Hydraulic Power Transmission System to load, and about 38% is lost in Hydraulic Elements, 20% motion being lost in car body and apparatus for work, and about 20% is lost in throttle grverning controls.Wherein the power-saving technology of Hydraulic Elements as pump, motor, cylinder, valve self has reached certain level, raises the efficiency very difficult further.
Utility model content
In view of the above deficiency of prior art, the purpose of this utility model is to provide a kind of excavator hydraulic system with energy feedback function, makes it the above deficiency overcoming prior art.
The purpose of this utility model is realized by following means.
There is the excavator hydraulic system of energy feedback function, comprise system main pump, main executive component: running motor, rotary motor, boom cylinder, bucket arm cylinder and bucket cylinder and the banked direction control valves being applied to the action controlling executive component mutually, it is characterized in that, hydraulic system access energy feedback module, described energy feedback module contains submodule I and submodule II;
Submodule I contains four two-position two-way solenoid valves (25,26,27 and 28), two one way valves (29 and 30), auxiliary variable motor 31, auxiliary variable pump 32, two-position two-way solenoid valve 33, proportional throttle valve 34, proportion directional flow valve 35, pressure sensor 37, and reclaims hydraulic fluid port I (N1), scraper bowl recovery hydraulic fluid port I (N2), dipper recovery hydraulic fluid port I (N3), revolution recovery hydraulic fluid port I (N4), accumulator (R), energy regenerative mouth I (Q1), energy regenerative mouth II (Q2), oil return opening (S) with swing arm.
In submodule I, the export pipeline 19 of four two-position two-way solenoid valves (25,26,27 and 28) be arranged in parallel is communicated with accumulator (R) by one way valve 29, is provided with two branch roads: the first branch road being connected proportional throttle valve 34 and second branch road of being connected by two-position two-way solenoid valve 33, auxiliary variable motor 31 in one way valve 29 front of export pipeline 19 with between oil return opening (S); On export pipeline 19, one way valve 29 rear sets gradually and to be made up of one way valve 30, auxiliary variable pump 32 and the 3rd branch road, the 4th branch road being connected proportion directional flow valve 35 and the 36-safety valve that communicate with oil return opening (S); Oil return opening (S) is connected with fuel tank; Energy regenerative mouth I (Q1), energy regenerative mouth II (Q2) are connected to system main pump outlet;
Submodule II is arranged between each executive component and banked direction control valves, contains shuttle valve 21, three two-position two-way solenoid valves (22,23 and 24) and four and reclaims with being connected hydraulic fluid port swing arm recovery port II
(U1), scraper bowl reclaims hydraulic fluid port II (U2), dipper reclaims hydraulic fluid port II (U3), revolution recovery port II (U4).
At rotary motor oil inlet and outlet shuttle valve 21 in parallel, shuttle valve 21 is indirect with U4 mouth; The oil circuit of boom cylinder, bucket arm cylinder and bucket cylinder rodless cavity is installed two-position two-way solenoid valve (24,23 and 22) respectively, and reclaim hydraulic fluid port II (U2) with swing arm recovery port (U1), scraper bowl respectively, dipper reclaims hydraulic fluid port II (U3) and is connected;
The swing arm of submodule I reclaims hydraulic fluid port I (N1), scraper bowl reclaims hydraulic fluid port I (N2), dipper reclaims hydraulic fluid port I (N3), hydraulic fluid port I (N4) is reclaimed in revolution, respectively with the swing arm recovery port (U1) of submodule II, scraper bowl reclaims hydraulic fluid port II (U2), dipper reclaims hydraulic fluid port II (U3), revolution recovery port II (U4) is connected respectively by oil pipe 38;
Accumulator 20 is connected with accumulator (R).
Two-position two-way solenoid valve (the often opening) 22-24 of energy feedback module, two-position two-way solenoid valve 25-28, two-position two-way solenoid valve (normally closed) 33, auxiliary variable motor 31 auxiliary variable pump 32, proportional throttle valve 34, proportion directional flow valve 35, pressure sensor 37 and excavator control system are electrically connected, except two-position two-way solenoid valve (often opening) 22-24, two-position two-way solenoid valve 25-28, two-position two-way solenoid valve 33, proportional throttle valve 34, proportion directional flow valve 35 adopt automatically controlled outside, the variable of auxiliary variable motor 31 and auxiliary variable pump 32 adopts automatically controlled adjustment (as adoption rate Displacement Regulation).
This recovery adopts accumulator to recover energy.
Compared with prior art, the utility model hydraulic system, make the motion of apparatus for work, throttle grverning control aspect obtains energy regenerating, energy feedback module is installed to excavator system as setting up module and independent of excavator system, forms a kind of independently energy feedback work pattern newly by the utility model.Pattern, according to the load of load and speed requirement situation, can adjust operating point automatically, has reclaimed useless energy to greatest extent, and has been automatically fed in hydraulic system, module highly versatile.Take-back model have employed meticulous energy recovery process, by oil return is divided into by operating pressure needed for transient state and flow: high-pressure low-flow, low pressure and mass flow, high-pressure high-flow, low-pressure low flow four kinds of meticulous operating modes, different operating mode is different to the loop of accumulator topping up process, has reclaimed energy to greatest extent.By electromagnetic valve switch boom cylinder, bucket cylinder, bucket arm cylinder, rotary motor useless energy consumption can be reclaimed by this module.By adoption rate flow valve, accumulator energy is presented and system automatically, and the speed governing of feasible system.
When not needing to reclaim, system does not affect original system and its duty.
Accompanying drawing illustrates:
The excavator hydraulic system schematic diagram of energy feedback module do not installed by accompanying drawing 1.
Energy feedback module excavator hydraulic system schematic diagram installed by accompanying drawing 2
Accompanying drawing 3 energy feedback module and hydraulic excavating machine controller are electrically connected schematic diagram
The enlarged diagram of accompanying drawing 4 energy feedback module submodule I
The enlarged diagram of accompanying drawing 5 energy feedback module submodule II.
In above each figure, 1-main pump 2-main pump II 3-fuel tank 4-motor 5-running motor 6-boom cylinder 7-bucket cylinder 8-bucket arm cylinder 9-rotary motor, 10-14-banked direction control valves, 15-safety valve, 16-overflow valve 17-one way valve submodule I, submodule II, 19-export pipeline, 20-accumulator, 21-shuttle valve, 22-24 two-position two-way solenoid valve (often opening), 25-28 two-position two-way solenoid valve, 29, 30--one way valve, 31-auxiliary variable motor, 32-auxiliary variable pump, 33-two-position two-way solenoid valve (normally closed), 34-proportional throttle valve, 35-proportion directional flow valve, 36 safety valves, 37-pressure sensor, 38-fluid pressure line, 39-one way valve, 40-controller
Detailed description of the invention:
The useless energy consumption of boom cylinder and rotary motor is very large, and energy-saving significance is maximum, how to work respectively below for boom cylinder and rotary motor course of work specification module.
(1) when excavator hydraulic system needs energy regenerating, submodule I submodule II, accumulator 20, one way valve 39 is installed by figure.
(2) when boom cylinder works, if swing arm is in the oil-feed of large chamber, moved arm lifting weight, the energy of consumption can regard as effective energy.When loculus oil-feed, swing arm decline, now swing arm have huge potential energy under weight or effect in outer year, swing arm declines and does work to piston rod, acceleration swing arm moves, and in order to swing arm obtains motion stably, usually on oil return line, fills choke valve, corresponding signal is sent by controller, swing arm oil return line just produces suitable back pressure PD and flow QD, realizes easy motion, and when fluid flows through choke valve, this part energy just have lost in vain.When needs reclaim these energy, in energy feedback module of the present utility model, 24-electromagnetic valve obtains electric, and loop original system being led to the boom cylinder of banked direction control valves cuts off; Electromagnetic valve 28 obtains electric simultaneously, enters swing arm take-back model.Control system sends required desirable PD, QD instruction.
If required PD is comparatively large, and when QD is very little, Controlling solenoid valve 28 is energized, boom cylinder large chamber oil return is directly filled with accumulator 20 through electromagnetic valve 28, one way valve 29.And at this pressure, be certain owing to being filled with accumulator flow, namely QD is not necessarily all filled with accumulator 20, and unnecessary small part flow is discharged to fuel tank by the restriction of resize ratio choke valve 34.In the process, owing to being filled with accumulator 20 not through throttling consumption, and little through the flow of proportioning valve throttling, so reclaimed energy to greatest extent.
If required PD is less, and QD larger time, PD insufficient pressure is with to accumulator topping up, Controlling solenoid valve 33 obtains electric, control system regulates the discharge capacity of auxiliary variable motor 31 and auxiliary variable pump 32 automatically, auxiliary variable motor 31 drives auxiliary variable pump 32 to suck fluid from fuel tank, and supercharging backlash is to accumulator.This state also can realize accumulation of energy when being equivalent to the instantaneous supercharging pressure of return pressure lower than accumulator, improves energy regenerating amount.
If required PD is when all QD is larger, Controlling solenoid valve 28 is energized, and boom cylinder large chamber oil return is directly filled with accumulator 20 through electromagnetic valve 28, one way valve 29.And at this pressure, be certain owing to being filled with accumulator flow, namely QD is not necessarily all filled with accumulator 20, and unnecessary small part flow is discharged to fuel tank by the restriction of resize ratio choke valve 34.In the process, owing to being filled with accumulator 20 not through throttling consumption, and less through the flow of proportioning valve throttling, so improve energy regenerating.
If when required PD, QD are less, when not having energy regenerating to be worth, Controlling solenoid valve 28 left position work, oil return directly gets back to fuel tank through proportional throttle valve 34, and passing ratio choke valve 34 obtains suitable PD and QD.
The load of the return pressure needed for swing arm and flow PD, QD idle rod and speed and become, and the pressure P X (or flow) during the topping up of accumulator is dynamic change, the automatic adjustment (namely suitable pressure and flow) of the operating point of passing ratio choke valve, and auxiliary variable pump, auxiliary variable motor the automatic adjustment of discharge capacity, both swing arm oil return line can have been made to produce suitable back pressure, suitable QD can have been obtained along with the transient changing of PD, QD and energy storage pressure PX again.
Same principle, also can be used in the oil return process of bucket cylinder, bucket arm cylinder.
(3) when rotary motor 9 works, its motion process comprises startup, acceleration, deceleration, stops.In moderating process, banked direction control valves 14 is in meta, main pump I fuel cut-off, huge owing to excavating top quality, inertia is huge, produce very large kinetic energy, this kinetic energy makes rotary motor be converted into becomes pump condition, pressure oil output, motion is stably obtained in order to make excavator top, usually on oil return line, fill choke valve or overflow valve, (or brake conversion becomes mechanical friction) produces suitable pressure P M, and flow QM.This part energy becomes thermal energy consumption.In energy feedback module of the present utility model, when needs reclaim these energy, electromagnetic valve obtains electric 25, enters rotary motor take-back model.Control system sends required desirable PM, QM instruction.
If required PM is comparatively large, and when QM is very little, makes electromagnetic valve 25 be energized, the pressure oil of rotary motor, through shuttle valve, through electromagnetic valve 25, one way valve 29, is directly filled with accumulator 20.And at this pressure, be certain owing to being filled with accumulator 20 flow, namely QM is not necessarily all filled with accumulator, and unnecessary small part flow is discharged to fuel tank by the restriction of resize ratio choke valve 34.In the process, owing to being filled with the fluid of accumulator 20 not through throttling consumption, and little through the flow of proportional throttle valve 34, so reclaimed energy to greatest extent.
If required PM is less, and QM larger time, PM insufficient pressure is in accumulator topping up, Controlling solenoid valve 33 obtains electric, control system regulates the discharge capacity of auxiliary variable motor 31 and auxiliary variable pump 32 automatically, auxiliary variable motor 31 drives auxiliary variable pump 32 to suck fluid from fuel tank, and supercharging backlash is to accumulator.Also can realize accumulation of energy during the instantaneous supercharging pressure of the pressure oil that this state is equivalent to rotary motor lower than accumulator, improve energy regenerating amount.
If when required PM, QM are larger, Controlling solenoid valve 25 is energized, and the pressure oil of rotary motor is directly filled with accumulator 20 through electromagnetic valve 25, one way valve 29.And at this pressure, be certain owing to being filled with accumulator flow, namely QD is not necessarily all filled with accumulator 20, unnecessary small part flow is discharged to fuel tank by the restriction of resize ratio choke valve 34.In the process, owing to being filled with accumulator 20 not through throttling consumption, and less through the flow of proportioning valve throttling, so improve energy regenerating.
If required PM is little, and when QM is less, when not having energy regenerating to be worth, Controlling solenoid valve 25 is energized, oil return directly gets back to fuel tank through proportional throttle valve 34, and passing ratio choke valve 34 obtains suitable PM and QM.
Return pressure needed for rotary motor 9 stable motion and flow PM, QM is with the load of rotary motor, factors such as speed and becoming, and the pressure P X (or flow) during the topping up of accumulator 20 is dynamic change, the object of adoption rate choke valve 34, the automatic adjustment (namely suitable pressure and flow) of the operating point of passing ratio choke valve, and auxiliary variable pump, the automatic adjustment of the discharge capacity of auxiliary variable motor both can make the pressure oil circuit of rotary motor produce suitable back pressure, again along with PM, the transient changing of QM and energy storage pressure PX and obtain suitable QM.
(4) the energy passing ratio directional flow valve 35 that accumulator 20 reclaims accesses the delivery outlet of main pump, when accumulation of energy power energy meets need of work, the energy feedback of preferential use accumulator 20 works with excavator system pressure oil, and passing ratio directional flow valve 35 adjust flux.If time not enough, close proportion directional flow valve 35, main pump energy supply.
This module of visible employing, can the useless energy consumption of the automatic recovery rotary motor, boom cylinder, bucket arm cylinder and bucket cylinder by switching solenoid valve.Also shield this module completely by electromagnetic valve, do not change original system independence using state.
Adopt this module also only can connect energy in the partial circuit recovery section executing agency course of work.
Claims (1)
1. there is the excavator hydraulic system of energy feedback function, comprise system main pump, main executive component: running motor, rotary motor, boom cylinder, bucket arm cylinder and bucket cylinder and the banked direction control valves being applied to the action controlling executive component mutually, it is characterized in that, hydraulic system access energy feedback module, described energy feedback module contains two submodule submodules I, submodule II;
Submodule I contains four two-position two-way solenoid valves (25,26,27 and 28), two one way valves (29 and 30), auxiliary variable motor (31), auxiliary variable pump (32), two-position two-way solenoid valve (33), proportional throttle valve (34), proportion directional flow valve (35), pressure sensor (37); And in oil circuit, be provided with swing arm recovery hydraulic fluid port I (N1), scraper bowl recovery hydraulic fluid port I (N2), dipper recovery hydraulic fluid port I (N3), revolution recovery hydraulic fluid port I (N4), accumulator (R), energy regenerative mouth I (Q1), energy regenerative mouth II (Q2), oil return opening (S).
In submodule I, the export pipeline (19) of four two-position two-way solenoid valves (25,26,27 and 28) be arranged in parallel is communicated with accumulator (R) by one way valve (29), is provided with two branch roads the one way valve (29) of export pipeline (19) is front: the first branch road being connected proportional throttle valve (34) and second branch road of being connected by two-position two-way solenoid valve (33), auxiliary variable motor (31) with between oil return opening (S); Set gradually after the upper one way valve (29) of export pipeline (19) and be made up of and the 3rd branch road communicated with oil return opening (S), the 4th branch road being connected proportion directional flow valve (35) and safety valve (36) one way valve (30), auxiliary variable pump (32); Oil return opening (S) is connected with fuel tank; Energy regenerative mouth I (Q1), energy regenerative mouth II (Q2) are connected to system main pump outlet;
Submodule II is arranged between each executive component and banked direction control valves, contains shuttle valve (21), three two-position two-way solenoid valves (22,23 and 24) and four recovery with being connected hydraulic fluid port: swing arm recovery port II (U1), scraper bowl reclaim hydraulic fluid port II (U2), dipper reclaims hydraulic fluid port II (U3), revolution recovery port II (U4);
Rotary motor oil inlet and outlet shuttle valve (21) in parallel; Shuttle valve (21) is indirect with U4 mouth; The oil circuit of boom cylinder, bucket arm cylinder and bucket cylinder rodless cavity is installed two-position two-way solenoid valve (24,23 and 22) respectively, and reclaim hydraulic fluid port II (U2) with swing arm recovery port II (U1), scraper bowl respectively, dipper reclaims hydraulic fluid port II (U3) and is connected;
The swing arm of submodule I reclaims hydraulic fluid port I (N1), scraper bowl reclaims hydraulic fluid port I (N2), dipper reclaims hydraulic fluid port I (N3), hydraulic fluid port I (N4) is reclaimed in revolution, by oil pipe successively respectively with the swing arm recovery port II (U1) of submodule II, scraper bowl reclaims hydraulic fluid port II (U2), dipper reclaims hydraulic fluid port II (U3), turn round recovery port II (U4) is connected between two; Connect respectively by oil pipe 38;
Accumulator (20) is connected with accumulator (R).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520357528.4U CN204898749U (en) | 2015-05-29 | 2015-05-29 | Excavator hydraulic system with energy repayment function |
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| CN201520357528.4U CN204898749U (en) | 2015-05-29 | 2015-05-29 | Excavator hydraulic system with energy repayment function |
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| CN204898749U true CN204898749U (en) | 2015-12-23 |
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| CN201520357528.4U Expired - Fee Related CN204898749U (en) | 2015-05-29 | 2015-05-29 | Excavator hydraulic system with energy repayment function |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104912137A (en) * | 2015-05-29 | 2015-09-16 | 西南交通大学 | Excavator hydraulic system with energy feedback function |
| CN107654445A (en) * | 2017-09-12 | 2018-02-02 | 太原科技大学 | A kind of repairing cooling circuit of excavator pump control system |
| CN109058195A (en) * | 2018-10-30 | 2018-12-21 | 徐工集团工程机械有限公司 | The hydraulic control system for equipment of speedily carrying out rescue work and equipment of speedily carrying out rescue work |
-
2015
- 2015-05-29 CN CN201520357528.4U patent/CN204898749U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104912137A (en) * | 2015-05-29 | 2015-09-16 | 西南交通大学 | Excavator hydraulic system with energy feedback function |
| CN104912137B (en) * | 2015-05-29 | 2017-08-04 | 西南交通大学 | excavator hydraulic system with energy feedback function |
| CN107654445A (en) * | 2017-09-12 | 2018-02-02 | 太原科技大学 | A kind of repairing cooling circuit of excavator pump control system |
| CN109058195A (en) * | 2018-10-30 | 2018-12-21 | 徐工集团工程机械有限公司 | The hydraulic control system for equipment of speedily carrying out rescue work and equipment of speedily carrying out rescue work |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151223 Termination date: 20180529 |