CN105804147A - Energy-saving system for revolving platform of hydraulic excavator - Google Patents

Energy-saving system for revolving platform of hydraulic excavator Download PDF

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Publication number
CN105804147A
CN105804147A CN201610157342.3A CN201610157342A CN105804147A CN 105804147 A CN105804147 A CN 105804147A CN 201610157342 A CN201610157342 A CN 201610157342A CN 105804147 A CN105804147 A CN 105804147A
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China
Prior art keywords
valve
directional control
solenoid directional
control valve
bit
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Granted
Application number
CN201610157342.3A
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Chinese (zh)
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CN105804147B (en
Inventor
石莹
郭正
付春雨
刘自刚
张为春
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Shandong University of Technology
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Shandong University of Technology
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Priority to CN201610157342.3A priority Critical patent/CN105804147B/en
Publication of CN105804147A publication Critical patent/CN105804147A/en
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Publication of CN105804147B publication Critical patent/CN105804147B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02FDREDGING; SOIL-SHIFTING
    • E02F9/00Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20Drives; Control devices
    • E02F9/22Hydraulic or pneumatic drives
    • E02F9/2217Hydraulic or pneumatic drives with energy recovery arrangements, e.g. using accumulators, flywheels

Abstract

The invention relates to an energy-saving system for a revolving platform of a hydraulic excavator. The system is formed by a hydraulic control system of the revolving platform of the excavator and comprises a hydraulic pump (1), an engine (2), an overflow valve (3), a three-position four-way electromagnetic directional valve (4), a first check valve (5) and the like, and is characterized in that an energy accumulator device is added to the hydraulic control system, and a pressure cylinder is connected in series in front of the energy accumulator. In braking of the revolving platform, energy consumed in braking can be stored in the energy accumulator, and meanwhile, pressure of oil in the energy accumulator can be increased. The system can reduce energy consumption during braking of the revolving platform of the excavator and can achieve the purpose of energy saving.

Description

A kind of hydraulic crawler excavator revolving dial energy conserving system
Technical field
The present invention relates to excavation machinery, more particularly, to the hydraulic energy-saving system of a kind of revolving platform of excavator.
Background technology
The revolving dial of hydraulic crawler excavator needs start frequently and brake the demand meeting work, in the work process of revolving dial, it is necessary to the full bucket of experience rotates forward and empty bucket two processes of reversion, and each process includes revolving dial and accelerates and two processes of braking deceleration.Owing to the inertia of revolving dial is relatively big, in the process of retarding braking, hydraulic oil flows back to fuel tank by choke valve, can cause bigger energy loss, causes the waste of the energy.Summary of the invention.
In order to solve the problems referred to above, the present invention proposes a kind of hydraulic crawler excavator revolving dial energy conserving system, it is possible to the effective energy reclaimed when hydraulic pressure revolving platform of excavator is braked.
A kind of hydraulic crawler excavator revolving dial energy conserving system, including variable pump (1), electromotor (2), overflow valve (3), three-position four-way electromagnetic directional valve (4), first check valve (5), second check valve (6), 3rd check valve (7), 4th check valve (8), rotary motor (9), 3-position-3-way solenoid directional control valve (10), pressurized cylinder (11), piston (12), accumulator (13), pressure transducer (14), first bi-bit bi-pass solenoid directional control valve (15), second bi-bit bi-pass solenoid directional control valve (16), controller (17), 3rd bi-bit bi-pass solenoid directional control valve (18), displacement transducer (19), 5th check valve (20), return spring (21);nullIt is characterized in that,Hydraulic pump (1) entrance is connected with fuel tank,Being parallel with overflow valve (3) between fuel tank and three-position four-way electromagnetic directional valve (4) prevents hydraulic pump (1) from transshipping,Hydraulic pump (1) outlet is connected with the C of reversal valve (4),Hydraulic motor respectively with the A of reversal valve (4)、B is connected,First check valve (5) is connected with the A mouth of reversal valve (4) with the 3rd check valve (7),Second check valve (6) is connected with the B mouth of reversal valve (4) with the 4th check valve (8),The D mouth of reversal valve (4) is connected with fuel tank,3rd check valve (7) is connected with fuel tank with the 4th check valve (8),First check valve (5) is connected with the E mouth of 3-position-3-way solenoid directional control valve (10) with second check valve (6),The G mouth of reversal valve (10) is connected with high pressure chest and the low pressure chamber of pressurized cylinder (11),The low pressure chamber of pressurized cylinder (11) is connected with reversal valve (15),Reversal valve (15) is connected with fuel tank,The high pressure chest of pressurized cylinder (11) is connected with reversal valve (18),Reversal valve (18) is connected with fuel tank,The high pressure chest of pressurized cylinder (11) and the 5th check valve (20) are connected,5th check valve (20) is connected with accumulator (13),Accumulator (13) is connected with reversal valve (16),Reversal valve (16) is connected with the C mouth of reversal valve (10),Controller (17) can control connecting and blocking-up of each reversal valve according to the piston displacement that accumulator (13) outlet pressure that energy storage pressure sensor (14) record records with the displacement transducer in pressurized cylinder (11) low pressure chamber and handle signal;Hydraulic crawler excavator revolving dial rotates forward three-position four-way electromagnetic directional valve (4) under operating mode and is in left operating position, 3-position-3-way solenoid directional control valve (10) is in left operating position, first bi-bit bi-pass solenoid directional control valve (15), second bi-bit bi-pass solenoid directional control valve (16) and the 3rd bi-bit bi-pass solenoid directional control valve (18) are in right operating position, now accumulator (13) does not store energy, hydraulic pump (1) drive hydraulic motor (9) band dynamic load to rotate;Hydraulic crawler excavator revolving dial rotates forward under damped condition, three-position four-way electromagnetic directional valve (4) mediates, now load-strap hydrodynamic pressure motor (9) rotates, hydraulic motor is pump condition, 3-position-3-way solenoid directional control valve (10) is in right operating position, first bi-bit bi-pass solenoid directional control valve (15), second bi-bit bi-pass solenoid directional control valve (16) and the 3rd 2/2-way solenoid directional control valve (18) are in right operating position, now accumulator (13) starts to store hydraulic oil under the effect of pressurized cylinder (11), pressurized cylinder (11) includes high pressure chest and low pressure chamber, N times (N > 1) that area A1 is piston area A2 in high pressure chest of the low pressure chamber of piston (12), such as N=5;nullUnder hydraulic crawler excavator revolving dial reversing damped condition,First three-position four-way electromagnetic directional valve (4) is in right operating position,3-position-3-way solenoid directional control valve (10) is in left operating position,First bi-bit bi-pass solenoid directional control valve (15)、3rd bi-bit bi-pass solenoid directional control valve (18) is in right operating position,Second bi-bit bi-pass solenoid directional control valve (16) is in left operating position,Now hydraulic motor (9) band dynamic load is driven to rotate together by accumulator (13) and hydraulic pump (1),When accumulator (13) mesohigh oil consumption is most,Controlled 3-position-3-way solenoid directional control valve (10) by controller (17) and be in left operating position,First bi-bit bi-pass solenoid directional control valve (15) and the 3rd bi-bit bi-pass solenoid directional control valve (18) are in left operating position,Second bi-bit bi-pass solenoid directional control valve (16) is in right operating position,Now the fluid in pressurized cylinder (11) low pressure chamber flows back to fuel tank,Return spring (21) makes the piston (12) of (11) in pressurized cylinder return to original position,Hydraulic oil in fuel tank flows to high pressure chest simultaneously,Avoid the occurrence of emptying phenomenon,After piston (12) returns to original position,By displacement transducer (19) by the Displacement Feedback of piston (12) to controller (17),Controller (17) controls 3-position-3-way solenoid directional control valve (10) and is in right operating position,First bi-bit bi-pass solenoid directional control valve (15)、Second bi-bit bi-pass solenoid directional control valve (16) and the 3rd bi-bit bi-pass solenoid directional control valve (18) are in left operating position,Removal process for braking energy thereafter is prepared.
Advantage for present invention
1 uses the energy loss that choke valve braking causes excessive due to hydraulic crawler excavator revolving dial, uses the energy regenerating that accumulator can will lose, and the Energy harvesting that accumulator stores gets up convenient and swift.
The hydraulic oil that 2 accumulators store can produce the problem of insufficient pressure, the hydraulic oil supercharging utilizing pressurized cylinder will store in accumulator, reaches the maximization that Brake energy recovery utilizes.
Accompanying drawing explanation
Fig. 1 is the layout schematic diagram of hydraulic crawler excavator revolving dial energy conserving system of the present invention.
Detailed description of the invention
1, hydraulic pump, 2, electromotor, 3, overflow valve, 4, three-position four-way electromagnetic directional valve, 5, first check valve, 6, second check valve, 7, 3rd check valve, 8, 4th check valve, 9, hydraulic motor, 10, 3-position-3-way solenoid directional control valve, 11, pressurized cylinder, 12, piston, 13, accumulator, 14, pressure transducer, 15, first bi-bit bi-pass solenoid directional control valve, 16, second bi-bit bi-pass solenoid directional control valve, 17, controller, 18, 3rd bi-bit bi-pass solenoid directional control valve, 19, displacement transducer, 20, 5th check valve, 21, return spring.
Below in conjunction with accompanying drawing, the present invention will be further described
As described in Figure 1, hydraulic crawler excavator revolving dial energy conserving system of the present invention includes: 1, hydraulic pump, 2, electromotor, 3, overflow valve, 4, three-position four-way electromagnetic directional valve, 5, first check valve, 6, second check valve, 7, 3rd check valve, 8, 4th check valve, 9, hydraulic motor, 10, 3-position-3-way solenoid directional control valve, 11, pressurized cylinder, 12, piston, 13, accumulator, 14, pressure transducer, 15, first bi-bit bi-pass solenoid directional control valve, 16, second bi-bit bi-pass solenoid directional control valve, 17, controller, 18, 3rd bi-bit bi-pass solenoid directional control valve, 19, displacement transducer, 20, 5th check valve, 21, return spring.
nullThe connected mode of this energy conserving system is: hydraulic pump 1 entrance is connected with fuel tank,Being parallel with overflow valve 3 between fuel tank and three-position four-way electromagnetic directional valve 4 prevents hydraulic pump 1 from transshipping,The C that hydraulic pump 1 exports with reversal valve 4 is connected,Hydraulic motor respectively with the A of reversal valve 4、B is connected,First check valve 5 is connected with the A mouth of reversal valve 4 with the 3rd check valve 7,Second check valve 6 is connected with the B mouth of reversal valve 4 with the 4th check valve 8,The D mouth of reversal valve 4 is connected with fuel tank,3rd check valve 7 is connected with fuel tank with the 4th check valve 8,First check valve 5 is connected with the E mouth of 3-position-3-way solenoid directional control valve 10 with second check valve 6,The G mouth of reversal valve 10 is connected with high pressure chest and the low pressure chamber of pressurized cylinder,The low pressure chamber of pressurized cylinder is connected with reversal valve 15,Reversal valve 15 is connected with fuel tank,The high pressure chest of pressurized cylinder is connected with reversal valve 18,Reversal valve 18 is connected with fuel tank,The high pressure chest of pressurized cylinder and the 5th check valve 20 are connected,5th check valve is connected with accumulator,Accumulator is connected with reversal valve 16,Reversal valve 16 is connected with the C mouth of reversal valve 10,Piston is arranged in pressurized cylinder,Return spring is arranged among the high pressure chest of pressurized cylinder,Pressure transducer 14 be arranged on accumulator oil circuit measure accumulator 13 hydraulic oil pressure pressure,Displacement transducer 19 is arranged in pressurized cylinder to measure the position of piston,Controller 17 is by circuit and pressure transducer 14、Displacement transducer 19 is connected,It is used for obtaining accumulator oil pressure and piston displacement,Controller 17 is by circuit and three-position four-way electromagnetic directional valve 4 simultaneously、3-position-3-way solenoid directional control valve 10、First bi-bit bi-pass solenoid directional control valve 15、Second bi-bit bi-pass solenoid directional control valve 16 is connected with the 3rd bi-bit bi-pass solenoid directional control valve 18.
Revolution first after excavator excavates, namely in the process of swing with loaded bucket, three-position four-way electromagnetic directional valve 4 is made to be in left operating position by regulating handle signal, 3-position-3-way solenoid directional control valve 10 is in left operating position simultaneously, revolving platform of excavator is in rotating forward operating mode, now, the oil that hydraulic pump 1 exports enters hydraulic motor 8 through three position four-way directional control valve 4 and drives revolving dial to rotate;When driver's brake pedal, controller 17 controls solenoid directional control valve 4 and is in middle operating position, now hydraulic pump 1 is in drain charge state, 3-position-3-way solenoid directional control valve 10 is in right operating position simultaneously, and load drives rotary motor 9 to rotate, and rotary motor 9 is in pump condition, revolving platform of excavator starts braking, the fluid that hydraulic motor 9 is discharged enters in accumulator 13 through pressurized cylinder 11, until revolving platform of excavator is braked completely, completes the removal process of braking energy;Now 15, second bi-bit bi-pass solenoid directional control valve 16 of first bi-bit bi-pass solenoid directional control valve and the 3rd bi-bit bi-pass solenoid directional control valve 18 are positioned at right operating position simultaneously;The operation principle of pressurized cylinder 11: the fluid that hydraulic motor 9 flows out simultaneously enters in high pressure chest and the low pressure chamber of pressurized cylinder 11 through 3-position-3-way solenoid directional control valve 10, due to 5 times that low pressure chamber area is high pressure chest area, so the hydraulic fluid pressure in high pressure chest is hydraulic fluid pressure in low pressure chamber 5 times;Such as low pressure chamber hydraulic fluid pressure P1=10Mpa, the then oil pressure P2=50Mpa of high pressure chest, hydraulic oil in high pressure chest flows in accumulator 13 through check valve and stores simultaneously, low pressure chamber is connected with fuel tank by first bi-bit bi-pass solenoid directional control valve 15, first bi-bit bi-pass solenoid directional control valve 15 now is in right operating position, and the hydraulic oil reservoir in low pressure chamber is stored in low pressure chamber;Second time revolution is carried out at excavator, namely in the process of swing with empty bucket, regulating handle signal makes three-position four-way electromagnetic directional valve 4 be in right operating position, 3-position-3-way solenoid directional control valve 10 is in left operating position simultaneously, first bi-bit bi-pass solenoid directional control valve 15 is in right operating position, second bi-bit bi-pass solenoid directional control valve 16 is in left operating position, and the 3rd bi-bit bi-pass solenoid directional control valve 18 is in right operating position, and revolving platform of excavator is in reversing damped condition;nullNow,Flowed out hydraulic oil by accumulator 13 to enter among hydraulic motor 9 through bi-bit bi-pass solenoid directional control valve 16 and three-position four-way electromagnetic directional valve 4,Hydraulic motor 9 drives revolving dial to rotate,Namely the rotation of revolving platform of excavator relies on accumulator 13 and hydraulic pump 1 to simultaneously drive,The fuel injection pressure signal of accumulator 13 is delivered in controller 17 by the pressure transducer 14 being arranged in accumulator 13,When the fluid stored in accumulator 13 is not enough to drive hydraulic motor 9,Namely when the oil pressure of accumulator 13 is lower than limit value,Controller 17 controls second bi-bit bi-pass solenoid directional control valve 16 and is in right operating position,3rd bi-bit bi-pass solenoid directional control valve 18 is positioned at left operating position,Now only driven hydraulic motor 9 by the fluid in hydraulic pump 1,And low pressure chamber fluid enters fuel tank,Return spring 21 effect in high pressure chest makes piston 12 return,Simultaneously because there is pressure reduction in high pressure chest and fuel tank,Fluid in fuel tank is back to high pressure chest by the 3rd bi-bit bi-pass solenoid directional control valve 18,Avoid high pressure chest occurs emptying phenomenon;The position of piston 12 measured by the displacement transducer 19 being arranged in pressurized cylinder 11, after piston 12 return, controller 17 controls first bi-bit bi-pass solenoid directional control valve and the 3rd bi-bit bi-pass solenoid directional control valve is in right operating position, 3-position-3-way solenoid directional control valve 10 is in left operating position, completing the return process of piston 12 in pressurized cylinder 11, energy regenerating during for braking after a while is prepared.

Claims (5)

1. a hydraulic crawler excavator revolving dial energy conserving system, including hydraulic pump (1), electromotor (2), overflow valve (3), three-position four-way electromagnetic directional valve (4), first check valve (5), second check valve (6), 3rd check valve (7), 4th check valve (8), hydraulic motor (9), 3-position-3-way solenoid directional control valve (10), pressurized cylinder (11), piston (12), accumulator (13), pressure transducer (14), first bi-bit bi-pass solenoid directional control valve (15), second bi-bit bi-pass solenoid directional control valve (16), controller (17), 3rd bi-bit bi-pass solenoid directional control valve (18), displacement transducer (19), 5th check valve (20), return spring (21);nullIt is characterized in that,Hydraulic pump (1) entrance is connected with fuel tank,Being parallel with overflow valve (3) between fuel tank and three-position four-way electromagnetic directional valve (4) prevents hydraulic pump (1) from transshipping,Hydraulic pump (1) outlet is connected with the C of reversal valve (4),Hydraulic motor respectively with the A of reversal valve (4)、B is connected,First check valve (5) is connected with the A mouth of reversal valve (4) with the 3rd check valve (7),Second check valve (6) is connected with the B mouth of reversal valve (4) with the 4th check valve (8),The D mouth of reversal valve (4) is connected with fuel tank,3rd check valve (7) is connected with fuel tank with the 4th check valve (8),First check valve (5) is connected with the E mouth of 3-position-3-way solenoid directional control valve (10) with second check valve (6),The G mouth of reversal valve (10) is connected with high pressure chest and the low pressure chamber of pressurized cylinder (11),The low pressure chamber of pressurized cylinder (11) is connected with reversal valve (15),Reversal valve (15) is connected with fuel tank,The high pressure chest of pressurized cylinder (11) is connected with reversal valve (18),Reversal valve (18) is connected with fuel tank,The high pressure chest of pressurized cylinder and the 5th check valve (20) are connected,5th check valve is connected with accumulator,Accumulator is connected with reversal valve (16),Reversal valve (16) is connected with the C mouth of reversal valve (10),Controller (17) can control connecting and blocking-up of each reversal valve according to piston (12) displacement that accumulator (13) outlet pressure that energy storage pressure sensor (14) record records with the displacement transducer (19) in pressurized cylinder (11) low pressure chamber and handle signal.
2. a kind of hydraulic crawler excavator revolving dial energy conserving system according to claim 1, it is characterized in that, hydraulic crawler excavator revolving dial rotates forward three-position four-way electromagnetic directional valve (4) under operating mode and is in left operating position, 3-position-3-way solenoid directional control valve (10) is in left operating position, first bi-bit bi-pass solenoid directional control valve (15), second bi-bit bi-pass solenoid directional control valve (16) and the 3rd bi-bit bi-pass solenoid directional control valve (18) are in right operating position, now accumulator (13) does not store energy, hydraulic motor (9) band dynamic load is driven to rotate by hydraulic pump (1);Hydraulic crawler excavator revolving dial rotates forward under damped condition, three-position four-way electromagnetic directional valve (4) mediates, now, rotated by load-strap hydrodynamic pressure motor (9), hydraulic motor is pump condition, 3-position-3-way solenoid directional control valve (10) is in right operating position, first bi-bit bi-pass solenoid directional control valve (15), second bi-bit bi-pass solenoid directional control valve (16) and the 3rd bi-bit bi-pass solenoid directional control valve (18) are in right operating position, now accumulator (13) starts to store hydraulic oil under the effect of pressurized cylinder (11), pressurized cylinder (11) includes high pressure chest and low pressure chamber, in low pressure chamber N times (N > 1) that area A1 is piston area A2 in high pressure chest of piston, such as N=5;nullUnder hydraulic crawler excavator revolving dial reversing damped condition,First three-position four-way electromagnetic directional valve (4) is in right operating position,3-position-3-way solenoid directional control valve (10) is in left operating position,First bi-bit bi-pass solenoid directional control valve and the 3rd bi-bit bi-pass solenoid directional control valve are in right operating position,Second bi-bit bi-pass solenoid directional control valve (16) is in left operating position,Now hydraulic motor (9) band dynamic load is driven to rotate together by accumulator (13) and hydraulic pump (1),When accumulator (13) mesohigh oil consumption is most,Controlled 3-position-3-way solenoid directional control valve (10) by controller (17) and be in left operating position,First bi-bit bi-pass solenoid directional control valve (15)、3rd bi-bit bi-pass solenoid directional control valve (18) is in left operating position,Second bi-bit bi-pass solenoid directional control valve (16) is in right operating position,Now the fluid in pressurized cylinder (11) low pressure chamber flows back to fuel tank,Return spring (21) makes the piston (12) in pressurized cylinder (11) return to original position,Hydraulic oil in fuel tank flows to high pressure chest simultaneously,Avoid the occurrence of emptying phenomenon,After piston (12) returns to original position,By displacement transducer (19) by piston (12) Displacement Feedback to controller (17),Controller (17) controls 3-position-3-way solenoid directional control valve (10) and is in right operating position,First bi-bit bi-pass solenoid directional control valve (15)、Second bi-bit bi-pass solenoid directional control valve (16) and the 3rd bi-bit bi-pass solenoid directional control valve (18) are in right operating position,Removal process for braking energy thereafter is prepared.
3. a kind of hydraulic crawler excavator revolving dial energy conserving system according to claim 1, it is characterised in that adopt three-position four-way electromagnetic directional valve (4) to control hydraulic motor and rotate the direction of (9), and then control the direction of motion of load;3-position-3-way solenoid directional control valve (10) is adopted to control the accumulation of energy process of accumulator (13);First bi-bit bi-pass solenoid directional control valve (15) is adopted to be used for controlling the process of the hydraulic oil flow oil sump tank of the low pressure chamber of pressurized cylinder (11);Second bi-bit bi-pass solenoid directional control valve (16) is adopted to control the energy release process of accumulator (13);Adopting the 3rd bi-bit bi-pass solenoid directional control valve (18) to control the oil in fuel tank to enter in pressurized cylinder high pressure chest, the purpose of this process is to make piston (21) return.
4. hydraulic crawler excavator revolving dial energy conserving system according to claim 1, it is characterised in that: by controller (17), three-position four-way electromagnetic directional valve (4), 3-position-3-way solenoid directional control valve (10), first bi-bit bi-pass solenoid directional control valve (15), second bi-bit bi-pass electromagnetism are controlled to valve (16), the 3rd bi-bit bi-pass solenoid directional control valve (18).
5. hydraulic crawler excavator revolving dial energy conserving system according to claim 1, it is characterized in that: the high pressure chest of pressurized cylinder (11) can be carried out supplementing of hydraulic oil by the 3rd bi-bit bi-pass solenoid directional control valve (18) after the release of accumulator (13) energy is complete, it is prevented that emptying phenomenon.
CN201610157342.3A 2016-03-21 2016-03-21 A kind of hydraulic crawler excavator revolving dial energy conserving system Expired - Fee Related CN105804147B (en)

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CN201610157342.3A CN105804147B (en) 2016-03-21 2016-03-21 A kind of hydraulic crawler excavator revolving dial energy conserving system

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Application Number Priority Date Filing Date Title
CN201610157342.3A CN105804147B (en) 2016-03-21 2016-03-21 A kind of hydraulic crawler excavator revolving dial energy conserving system

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CN105804147B CN105804147B (en) 2017-12-01

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108643276A (en) * 2018-06-06 2018-10-12 马鞍山松鹤信息科技有限公司 A kind of energy saving excavator with energy-recuperation system
CN108894274A (en) * 2018-07-27 2018-11-27 徐州工业职业技术学院 A kind of excavator rotation energy recycling and reuse system
CN108915006A (en) * 2018-07-09 2018-11-30 马鞍山市润启新材料科技有限公司 A kind of excavator energy-recuperation system
CN108915008A (en) * 2018-07-09 2018-11-30 马鞍山市润启新材料科技有限公司 A kind of excavator Hydraulic slewing system

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JP2004028212A (en) * 2002-06-26 2004-01-29 Komatsu Ltd Simultaneous recovery system of pressure oil energy
JP2011047460A (en) * 2009-08-26 2011-03-10 Kcm:Kk Fluid pressure circuit and construction machine equipped with the same
CN102979133A (en) * 2012-11-26 2013-03-20 柳州柳工挖掘机有限公司 Rotary brake energy recycling device of hydraulic excavator
CN103437393A (en) * 2013-08-30 2013-12-11 华南理工大学 Rotation energy saving system of hydraulic excavator

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004028212A (en) * 2002-06-26 2004-01-29 Komatsu Ltd Simultaneous recovery system of pressure oil energy
JP2011047460A (en) * 2009-08-26 2011-03-10 Kcm:Kk Fluid pressure circuit and construction machine equipped with the same
CN102979133A (en) * 2012-11-26 2013-03-20 柳州柳工挖掘机有限公司 Rotary brake energy recycling device of hydraulic excavator
CN103437393A (en) * 2013-08-30 2013-12-11 华南理工大学 Rotation energy saving system of hydraulic excavator

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108643276A (en) * 2018-06-06 2018-10-12 马鞍山松鹤信息科技有限公司 A kind of energy saving excavator with energy-recuperation system
CN108915006A (en) * 2018-07-09 2018-11-30 马鞍山市润启新材料科技有限公司 A kind of excavator energy-recuperation system
CN108915008A (en) * 2018-07-09 2018-11-30 马鞍山市润启新材料科技有限公司 A kind of excavator Hydraulic slewing system
CN108915008B (en) * 2018-07-09 2021-05-28 马鞍山市润启新材料科技有限公司 Rotary hydraulic system of excavator
CN108894274A (en) * 2018-07-27 2018-11-27 徐州工业职业技术学院 A kind of excavator rotation energy recycling and reuse system
CN108894274B (en) * 2018-07-27 2020-10-16 徐州工业职业技术学院 Excavator gyration energy recuperation and system of recycling

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