CN105386477A - Device and method for absorbing swing arm descending energy during composite movement of excavator - Google Patents
Device and method for absorbing swing arm descending energy during composite movement of excavator Download PDFInfo
- Publication number
- CN105386477A CN105386477A CN201510729113.XA CN201510729113A CN105386477A CN 105386477 A CN105386477 A CN 105386477A CN 201510729113 A CN201510729113 A CN 201510729113A CN 105386477 A CN105386477 A CN 105386477A
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- oil
- operated directional
- valve
- pilot operated
- directional control
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- 239000002131 composite material Substances 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 title claims abstract description 15
- 239000003921 oil Substances 0.000 claims abstract description 52
- 239000010720 hydraulic oil Substances 0.000 claims abstract description 36
- 230000000694 effects Effects 0.000 claims abstract description 7
- 230000007423 decrease Effects 0.000 claims description 28
- 239000012530 fluid Substances 0.000 claims description 14
- 238000010521 absorption reaction Methods 0.000 claims description 11
- 238000010586 diagram Methods 0.000 description 4
- 238000006073 displacement reaction Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000000446 fuel Substances 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005381 potential energy Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F3/00—Dredgers; Soil-shifting machines
- E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
- E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
- E02F3/36—Component parts
- E02F3/42—Drives for dippers, buckets, dipper-arms or bucket-arms
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/22—Hydraulic or pneumatic drives
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/22—Hydraulic or pneumatic drives
- E02F9/2264—Arrangements or adaptations of elements for hydraulic drives
- E02F9/2267—Valves or distributors
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Operation Control Of Excavators (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The invention discloses a device and method for absorbing swing arm descending energy during composite movement of an excavator. The device comprises a one-way valve (2), a first hydraulic operated directional valve (3), a second hydraulic operated directional valve (4), a shuttle valve (5) and a third hydraulic operated directional valve (6); the oil inlet of the one-way valve is connected with the oil outlet of a gear pump P3 in a main pump, and the oil outlet of the one-way valve is connected with the oil inlet of the first hydraulic operated directional valve; two oil outlets of the first hydraulic operated directional valve are connected with P3 openings in a hydraulic oil tank and a multiway valve respectively; oil openings in the two ends of the shuttle valve are connected with ports pa2 and pb2 of a rotary valve element respectively, and the oil outlet is connected with the oil inlet of the third hydraulic operated directional valve; and the oil outlet of the third hydraulic operated directional valve is connected with the control end of the first hydraulic operated directional valve and the control end of the second hydraulic operated directional valve. By means of the device and method, swing arm descending energy can be effectively used and can be used for get-on rotation, and therefore the effect of reducing oil consumption is achieved.
Description
Technical field
When the present invention relates to a kind of excavator composite move, the device and method of swing arm decline energy absorption, belongs to excavator technical field.
Background technology
At present, hydraulic crawler excavator car load everything drives executive component to realize by hydraulic oil.The hydraulic system of existing small type hydraulic excavator adopts throttling control mode usually, forming primarily of main pump, banked direction control valves, rotary motor and running motor of this control system.In throttle system, main pump is made up of the gear pump P4 of a gear pump P3 and small displacement of Two Variables plunger displacement pump P1 and P2, a huge discharge, and the Main Function of these four pumps is respectively: Variable plunger pump P1 provides right running motor, boom cylinder and the hydraulic oil required for bucket cylinder work; Variable plunger pump P2 provides left running motor, hydraulic oil required for bucket arm cylinder work; P3 provides rotary motor, hydraulic oil required for dozer work; P4 provides complete machine pilot element and the guide oil needed for signal oil circuit, and guide oil oil pressure is lower.The hydraulic oil distribution that the effect of banked direction control valves mainly provides main pump is to each executive component.
During work, mechanical shovel bucket to be excavated dig full after, driver is promoted by swing arm and the composite move of upper-part rotation, be delivered to by scraper bowl above haulage vehicle, rear unloading opened by scraper bowl, after unloading, declined and upper-part rotation composite move by swing arm, scraper bowl is sent to excavation site, re-starts excavation.
After power shovel unloading, when realizing return by swing arm decline and upper-part rotation composite move, swing arm relies on the gravity of whole equipment to decline, now the return pressure of boom cylinder rodless cavity is very high, returned by spool in hydraulic oil container process, first needing to carry out throttling to it, anti-stopper arms decline is too fast causes car load impact excessive, after the oil back chamber arriving banked direction control valves, return pressure reduces further.In this process, the potential energy that swing arm declines is consumed by the mode of throttling, is converted into heat energy and is dissipated by radiator, and the energy that swing arm declines can not get effective utilization, causes the waste of resource.And revolution action needs to rely on gear pump P3 to provide hydraulic oil to drive, this just needs the power of consumption of engine, thus consumes more fuel oil.
Summary of the invention
For above-mentioned prior art Problems existing, the device and method of swing arm decline energy absorption when the invention provides a kind of excavator composite move, the energy that can effectively utilize swing arm to decline, is upper-part rotation used, reduces oil consumption.
To achieve these goals, tower body and lift-up device are introduced in a kind of bottom that the present invention adopts, comprise one way valve, the first pilot operated directional control valve, the second pilot operated directional control valve, shuttle valve and the 3rd pilot operated directional control valve, the oil-in of one way valve is connected with the gear pump P3 oil-out in main pump 1, and the oil-out of one way valve is connected with the oil-in of the first pilot operated directional control valve; Two oil-outs of the first pilot operated directional control valve are connected with the P3 mouth on hydraulic oil container, banked direction control valves respectively; The oil-in of the second pilot operated directional control valve is connected with the rodless cavity of boom cylinder, and oil-out is connected with the P3 mouth on banked direction control valves with the A8 mouth on banked direction control valves respectively; Shuttle valve two ends hydraulic fluid port is connected with rotary valve key port pa2 with pb2 respectively, and oil-out is connected with the oil-in of the 3rd pilot operated directional control valve 6; The oil-out of the 3rd pilot operated directional control valve is connected with the control end of the first pilot operated directional control valve, the second pilot operated directional control valve.
A method for swing arm decline energy absorption during excavator composite move, when this swing arm decline energy absorbing method adopts above-mentioned excavator composite move, the device of swing arm decline energy absorption realizes, specifically:
When operating swing arm and pivotal pilot valve handle simultaneously, make excavator do swing arm decline and upper-part rotation composite move time, guide oil is delivered to the oil-in of the 3rd pilot operated directional control valve by pilot valve simultaneously by the oil-out of shuttle valve to the guide oil of rotary valve key control port pa2 or pb2 on banked direction control valves; Swing arm spool control port pb8 place guide oil arrives the control end of the 3rd pilot operated directional control valve, by the 3rd pilot operated directional control valve commutation, arrived the control end of the first pilot operated directional control valve and the second pilot operated directional control valve by the 3rd pilot operated directional control valve oil-out from the guide oil of shuttle valve oil-out, first pilot operated directional control valve and the second pilot operated directional control valve are commutated simultaneously, after first pilot operated directional control valve commutation, gear pump P3 oil-out in main pump is communicated with hydraulic oil container through one way valve, the second pilot operated directional control valve, and the hydraulic oil that P3 pump exports directly returns hydraulic oil container; After first pilot operated directional control valve commutation, the rodless cavity of boom cylinder is communicated with the P3 mouth on banked direction control valves by the second pilot operated directional control valve, when swing arm declines, rotary valve key is after the effect commutation of its control port pa2 or pb2 place guide oil, the rodless cavity hydraulic oil of boom cylinder provides hydraulic oil by the revolution that the P3 hydraulic fluid port on banked direction control valves is rotary motor, driving rotary motor rotates, and realizes upper-part rotation, thus achieves the composite move of swing arm decline and upper-part rotation; Wherein, the action that pa2 and pb2 hydraulic fluid port is corresponding is respectively for getting on the bus revolution left and to right-hand rotation.
Compared with prior art, the present invention adopts the element that the excavators such as one way valve, pilot operated directional control valve and shuttle valve generally use, and achieves the absorption of swing arm decline energy, and is that upper-part rotation is used, thus play the effect reducing oil consumption, production and the use of mass can be realized.In addition, due to excavator operationally, all adopt composite move, above operating mode is circulating in digging operation each time, all can occur once, so by use of the present invention, can improve fuel utilization ratio, oil consumption can reduce largely.
Accompanying drawing explanation
Fig. 1 is hydraulic principle schematic diagram of the present invention;
Fig. 2 is that the present invention operates swing arm decline and pivotal hydraulic schematic diagram left of getting on the bus simultaneously;
Fig. 3 is the hydraulic schematic diagram that one action swing arm of the present invention declines;
Fig. 4 is that one action of the present invention is got on the bus pivotal hydraulic schematic diagram left;
In figure: 1, main pump, 2, one way valve, the 3, first pilot operated directional control valve, the 4, second pilot operated directional control valve, 5, shuttle valve, the 6, the 3rd pilot operated directional control valve, 7, banked direction control valves, 8, boom cylinder, 9, rotary motor.
Detailed description of the invention
Below in conjunction with accompanying drawing, the invention will be further described.
As shown in Figure 1, the device and method of swing arm decline energy absorption during a kind of excavator composite move, comprise one way valve 2, first pilot operated directional control valve 3, second pilot operated directional control valve 4, shuttle valve 5 and the 3rd pilot operated directional control valve 6, the oil-in of one way valve 2 is connected with the gear pump P3 oil-out in main pump 1, and the oil-out of one way valve 2 is connected with the oil-in of the first pilot operated directional control valve 3; Two oil-outs of the first pilot operated directional control valve 3 are connected with the P3 mouth on hydraulic oil container, banked direction control valves 7 respectively; The oil-in of the second pilot operated directional control valve 4 is connected with the rodless cavity of boom cylinder 8, and oil-out is connected with the P3 mouth on banked direction control valves 7 with the A8 mouth on banked direction control valves 7 respectively; Shuttle valve 5 two ends hydraulic fluid port is connected with rotary valve key port pa2 with pb2 respectively, and oil-out is connected with the oil-in of the 3rd pilot operated directional control valve 6; The oil-out of the 3rd pilot operated directional control valve 6 is connected with the control end of the first pilot operated directional control valve 3, second pilot operated directional control valve 4.
A kind of method of swing arm decline energy absorption during excavator composite move, when operating swing arm and pivotal pilot valve handle simultaneously, make excavator do swing arm decline and upper-part rotation composite move time, guide oil is delivered to the oil-in of the 3rd pilot operated directional control valve 6 by pilot valve simultaneously by the oil-out of shuttle valve 5 to the guide oil of rotary valve key control port pa2 or pb2 on banked direction control valves 7; Swing arm spool control port pb8 place guide oil arrives the control end of the 3rd pilot operated directional control valve 6,3rd pilot operated directional control valve 6 is commutated, arrived the control end of the first pilot operated directional control valve 3 and the second pilot operated directional control valve 4 by the 3rd pilot operated directional control valve 6 oil-out from the guide oil of shuttle valve 5 oil-out, first pilot operated directional control valve 3 and the second pilot operated directional control valve 4 are commutated simultaneously, after first pilot operated directional control valve 3 commutates, gear pump P3 oil-out in main pump 1 is communicated with hydraulic oil container through one way valve 2, second pilot operated directional control valve 3, and the hydraulic oil that P3 pump exports directly returns hydraulic oil container; After second pilot operated directional control valve 4 commutates, the rodless cavity of boom cylinder is communicated with the P3 mouth on banked direction control valves 7 by the second pilot operated directional control valve 4, when swing arm declines, rotary valve key is after the effect commutation of its control port pa2 or pb2 place guide oil, the rodless cavity hydraulic oil of boom cylinder 8 provides hydraulic oil by the revolution that the P3 hydraulic fluid port on banked direction control valves 7 is rotary motor, driving rotary motor rotates, and realizes upper-part rotation, thus achieves the composite move of swing arm decline and upper-part rotation; Wherein, the action that pa2 and pb2 hydraulic fluid port is corresponding is respectively for getting on the bus revolution left and to right-hand rotation.
As shown in Figure 2, operate when simultaneously and control swing arm and pivotal pilot valve handle, make excavator do swing arm decline and get on the bus left pivotal composite move time, pilot valve provides guide oil to the rotary valve key control port pa2 on banked direction control valves 7 and swing arm spool control port pb8 simultaneously, pa2 place guide oil promotes rotary valve key commutation, shift the steel ball of shuttle valve 5 onto opposite side, guide oil arrives the oil-in of the 3rd pilot operated directional control valve 6 by the outlet of shuttle valve 5 simultaneously, swing arm spool control port pb8 place guide oil promotes the commutation of swing arm spool, arrive the control end of the 3rd pilot operated directional control valve 6 simultaneously, 3rd pilot operated directional control valve 6 is commutated, make the control end being arrived the first pilot operated directional control valve 3 and the second pilot operated directional control valve 4 from shuttle valve 5 oil-out guide oil by the 3rd pilot operated directional control valve 6, first pilot operated directional control valve 3 and the second pilot operated directional control valve 4 are commutated simultaneously, after first pilot operated directional control valve 3 commutates, gear pump P3 oil-out in main pump 1 is communicated with hydraulic oil container by one way valve 2 and the first pilot operated directional control valve 3, the hydraulic oil that P3 pump exports directly returns hydraulic oil container, after second pilot operated directional control valve 4 commutates, the rodless cavity of boom cylinder is communicated with the P3 mouth on banked direction control valves 7 by the second pilot operated directional control valve 4, like this, when swing arm declines, the revolution that the rodless cavity hydraulic oil of boom cylinder 8 is just rotary motor by the P3 mouth on banked direction control valves 7 provides hydraulic oil, driving rotary motor rotates, and realizes upper-part rotation, thus achieves the composite move of swing arm decline and upper-part rotation.
As shown in Figure 3, when only operating the pilot valve handle controlling swing arm, when making excavator only do the action of swing arm decline, pilot valve provides guide oil to the swing arm spool control port pb8 on banked direction control valves 7, guide oil promotes the commutation of swing arm spool, arrive the control end of the 3rd pilot operated directional control valve 6 simultaneously, 3rd pilot operated directional control valve 6 is commutated, but now, owing to not operating revolution pilot valve handle, so rotary valve key control port pa2 and Pb2 place do not have guide oil, shuttle valve 5 does not have guide oil yet, therefore do not have guide oil to promote the first pilot operated directional control valve 3 by the 3rd pilot operated directional control valve 6 and the second pilot operated directional control valve 4 commutates.Now, P1 plunger displacement pump oil-out in main pump 1 is communicated with the P1 hydraulic fluid port on banked direction control valves 7, after the commutation of swing arm spool, the hydraulic oil that P1 pump provides enters boom cylinder rod chamber by swing arm spool, the hydraulic oil of rodless cavity is first by the second pilot operated directional control valve 4, get back in the oil back chamber of banked direction control valves 7 by swing arm throttling spool mouth again, finally get back to hydraulic oil container, like this, just achieve the action that swing arm declines.
As shown in Figure 4, pivotal pilot valve handle is controlled when only operating, make excavator only get on the bus left turn round one action time, pilot valve provides guide oil to the rotary valve key control port pa2 on banked direction control valves 7, pa2 place guide oil promotes rotary valve key commutation, shift the steel ball of shuttle valve 5 onto opposite side simultaneously, guide oil arrives the oil-in of the 3rd pilot operated directional control valve 6 by the oil-out of shuttle valve 5, but now, owing to not operating swing arm pilot valve handle, so swing arm spool control port pb8 place does not have guide oil, the 3rd pilot operated directional control valve 6 just cannot commutate.Thus do not have guide oil to push away the first pilot operated directional control valve 3 by the 3rd pilot operated directional control valve 6 and the second pilot operated directional control valve 4 commutates.Now, P3 in main pump 1 is pumped hydraulic fluid port and is communicated with the P3 hydraulic fluid port on banked direction control valves 7 by one way valve 2, first pilot operated directional control valve 3, after rotary valve key commutation, the hydraulic oil that P3 pump provides arrives rotary motor B hydraulic fluid port by rotary valve key, driving rotary motor rotates, the oil back chamber of banked direction control valves 7 is got back in the oil return of rotary motor A hydraulic fluid port by rotary valve key, finally get back to hydraulic oil container.Like this, the revolution left of getting on the bus just is achieved.
From said structure, the present invention is by using this device and method, and the energy that can effectively utilize swing arm to decline, is upper-part rotation used, thus plays the effect reducing oil consumption.
Claims (2)
1. the device of swing arm decline energy absorption during an excavator composite move, it is characterized in that, comprise one way valve (2), the first pilot operated directional control valve (3), the second pilot operated directional control valve (4), shuttle valve (5) and the 3rd pilot operated directional control valve (6), the oil-in of one way valve (2) is connected with the gear pump P3 oil-out in main pump (1), and the oil-out of one way valve (2) is connected with the oil-in of the first pilot operated directional control valve (3); Two oil-outs of the first pilot operated directional control valve (3) are connected with the P3 mouth on hydraulic oil container, banked direction control valves (7) respectively; The oil-in of the second pilot operated directional control valve (4) is connected with the rodless cavity of boom cylinder (8), and oil-out is connected with the P3 mouth on banked direction control valves (7) with the A8 mouth on banked direction control valves (7) respectively; Shuttle valve 5 two ends hydraulic fluid port is connected with rotary valve key port pa2 with pb2 respectively, and oil-out is connected with the oil-in of the 3rd pilot operated directional control valve (6); The oil-out of the 3rd pilot operated directional control valve (6) is connected with the control end of the first pilot operated directional control valve (3), the second pilot operated directional control valve (4).
2. the method for swing arm decline energy absorption during excavator composite move, is characterized in that, when swing arm decline energy absorbing method adopts excavator composite move described in claim 1, the device of swing arm decline energy absorption realizes, specifically:
When operating swing arm and pivotal pilot valve handle simultaneously, make excavator do swing arm decline and upper-part rotation composite move time, guide oil is delivered to the oil-in of the 3rd pilot operated directional control valve (6) by pilot valve simultaneously by the oil-out of shuttle valve (5) to the guide oil of rotary valve key control port pa2 or pb2 on banked direction control valves (7), swing arm spool control port pb8 place guide oil arrives the control end of the 3rd pilot operated directional control valve (6), by the 3rd pilot operated directional control valve (6) commutation, arrived the control end of the first pilot operated directional control valve (3) and the second pilot operated directional control valve (4) by the 3rd pilot operated directional control valve (6) oil-out from the guide oil of shuttle valve (5) oil-out, first pilot operated directional control valve (3) and the second pilot operated directional control valve (4) are commutated simultaneously, after first pilot operated directional control valve (3) commutation, make gear pump P3 oil-out in main pump (1) through one way valve (2), second pilot operated directional control valve (3) communicates with hydraulic oil container, the hydraulic oil that P3 pump exports directly returns hydraulic oil container, after second pilot operated directional control valve (4) commutation, the rodless cavity of boom cylinder is communicated with the P3 mouth on banked direction control valves (7) by the second pilot operated directional control valve (4), when swing arm declines, rotary valve key is after the effect commutation of its control port pa2 or pb2 place guide oil, the rodless cavity hydraulic oil of boom cylinder (8) provides hydraulic oil by the revolution that the P3 hydraulic fluid port on banked direction control valves (7) is rotary motor, driving rotary motor rotates, realize upper-part rotation, thus achieve the composite move of swing arm decline and upper-part rotation, wherein, the action that pa2 and pb2 hydraulic fluid port is corresponding is respectively for getting on the bus revolution left and to right-hand rotation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510729113.XA CN105386477B (en) | 2015-10-30 | 2015-10-30 | Swing arm declines the device of energy absorption during a kind of excavator composite move |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510729113.XA CN105386477B (en) | 2015-10-30 | 2015-10-30 | Swing arm declines the device of energy absorption during a kind of excavator composite move |
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| Publication Number | Publication Date |
|---|---|
| CN105386477A true CN105386477A (en) | 2016-03-09 |
| CN105386477B CN105386477B (en) | 2017-11-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510729113.XA Active CN105386477B (en) | 2015-10-30 | 2015-10-30 | Swing arm declines the device of energy absorption during a kind of excavator composite move |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106988374A (en) * | 2017-05-31 | 2017-07-28 | 徐州徐工挖掘机械有限公司 | A kind of excavator energy regenerating oil-supplementing system and its method |
| CN107201758A (en) * | 2017-06-15 | 2017-09-26 | 柳州柳工挖掘机有限公司 | excavator hydraulic system |
| CN110409527A (en) * | 2019-06-28 | 2019-11-05 | 三一重机有限公司 | A kind of movable arm potential energy recycling system and excavator |
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| JP2006336844A (en) * | 2005-06-06 | 2006-12-14 | Shin Caterpillar Mitsubishi Ltd | Working machine |
| CN101793042A (en) * | 2009-12-31 | 2010-08-04 | 福田雷沃国际重工股份有限公司 | Hydraulic loop device used for coordinating machine body rotation and movable arm swinging of digging machine |
| JP2013087456A (en) * | 2011-10-14 | 2013-05-13 | Hitachi Constr Mach Co Ltd | Hybrid construction machine and control method thereof |
| CN102400476B (en) * | 2011-10-28 | 2013-08-21 | 山河智能装备股份有限公司 | Hydraulic circuit controlling preferred movement of moveable arm to lift or rotate |
| CN103541395A (en) * | 2013-09-26 | 2014-01-29 | 徐州徐工挖掘机械有限公司 | Hydraulic excavator energy-conservation control system |
-
2015
- 2015-10-30 CN CN201510729113.XA patent/CN105386477B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006336844A (en) * | 2005-06-06 | 2006-12-14 | Shin Caterpillar Mitsubishi Ltd | Working machine |
| CN101793042A (en) * | 2009-12-31 | 2010-08-04 | 福田雷沃国际重工股份有限公司 | Hydraulic loop device used for coordinating machine body rotation and movable arm swinging of digging machine |
| JP2013087456A (en) * | 2011-10-14 | 2013-05-13 | Hitachi Constr Mach Co Ltd | Hybrid construction machine and control method thereof |
| CN102400476B (en) * | 2011-10-28 | 2013-08-21 | 山河智能装备股份有限公司 | Hydraulic circuit controlling preferred movement of moveable arm to lift or rotate |
| CN103541395A (en) * | 2013-09-26 | 2014-01-29 | 徐州徐工挖掘机械有限公司 | Hydraulic excavator energy-conservation control system |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106988374A (en) * | 2017-05-31 | 2017-07-28 | 徐州徐工挖掘机械有限公司 | A kind of excavator energy regenerating oil-supplementing system and its method |
| CN107201758A (en) * | 2017-06-15 | 2017-09-26 | 柳州柳工挖掘机有限公司 | excavator hydraulic system |
| CN110409527A (en) * | 2019-06-28 | 2019-11-05 | 三一重机有限公司 | A kind of movable arm potential energy recycling system and excavator |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105386477B (en) | 2017-11-21 |
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