CN106223391A - A kind of excavator energy regenerating and utilize system - Google Patents

A kind of excavator energy regenerating and utilize system Download PDF

Info

Publication number
CN106223391A
CN106223391A CN201610778963.3A CN201610778963A CN106223391A CN 106223391 A CN106223391 A CN 106223391A CN 201610778963 A CN201610778963 A CN 201610778963A CN 106223391 A CN106223391 A CN 106223391A
Authority
CN
China
Prior art keywords
oil cylinder
control valve
hydraulic
fluid port
oil
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201610778963.3A
Other languages
Chinese (zh)
Inventor
费树辉
贺艳飞
秦家升
金月峰
王振兴
方锦辉
王钦
谭贤文
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Xuzhou XCMG Excavator Machinery Co Ltd
Original Assignee
Xuzhou XCMG Excavator Machinery Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Xuzhou XCMG Excavator Machinery Co Ltd filed Critical Xuzhou XCMG Excavator Machinery Co Ltd
Priority to CN201610778963.3A priority Critical patent/CN106223391A/en
Publication of CN106223391A publication Critical patent/CN106223391A/en
Pending legal-status Critical Current

Links

Classifications

    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02FDREDGING; SOIL-SHIFTING
    • E02F3/00Dredgers; Soil-shifting machines
    • E02F3/04Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/28Dredgers; 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
    • E02F3/36Component parts
    • E02F3/42Drives for dippers, buckets, dipper-arms or bucket-arms
    • 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
    • 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 present invention discloses a kind of excavator energy regenerating and utilizes system, including volume adjustable hydraulic pump, the first control valve, the first oil cylinder, the second control valve, the second oil cylinder, hydraulic accumulator and overflow valve, first oil cylinder is boom cylinder, is used for driving excavator swing arm lifting work;When swing arm declines, making the first oil cylinder retract by the first control valve, the first oil cylinder rodless cavity makes recovery fluid supercharging enter hydraulic accumulator through the second control valve, the second oil cylinder, it is achieved the recovery of movable arm potential energy;When boom arm lift, according to the first Flow of Cylinder needs, control variable hydraulic pump and hydraulic accumulator drive the first oil cylinder to run, it is achieved the utilization of movable arm potential energy.The present invention manipulates two oil cylinders and the work of hydraulic accumulator by the control of each control valve, it is achieved that the lifting of swing arm, is simultaneously achieved directly reclaiming and utilizing of movable arm potential energy, has saved cost;Not affecting operability, simple in construction, transmission efficiency are high.

Description

A kind of excavator energy regenerating and utilize system
Technical field
The present invention relates to a kind of excavator energy regenerating and utilize system, belong to excavator energy regenerating and utilize technology to lead Territory.
Background technology
Developing rapidly along with socioeconomic, energy shortage and problem of environmental pollution are on the rise, and each state will reduce the most Energy loss, protection environment are brought into schedule.Meanwhile, Energy Efficiency Ratio is one of key parameter of the hydraulic crawler excavator market competition, therefore The Study on energy saving of hydraulic crawler excavator and apply particularly necessary.
At present, country's 13 science and technology supporting projects have been listed in oil-liquid hybrid electric technical research in, based on excavator energy The hydraulic hybrid Study on energy saving reclaimed and application, mainly can be carried out back excavator swing arm potential energy, rotary braking Receiving, the energy of recovery is stored by accumulator.The energy utilization mode reclaimed mainly has directly or indirectly two kinds, directly utilizes and is Directly driving executive component to work the energy of recovery, indirect utilization is that the energy reclaimed is passed through the element transformation such as pump/motor After drive executive component to work again, indirect utilization mode transmission efficiency is relatively low, directly utilizes mode transmission efficiency higher.
Summary of the invention
The problem existed for above-mentioned prior art, the present invention provides a kind of excavator energy regenerating and utilizes system, real While existing swing arm lifting, directly reclaiming and utilizing of movable arm potential energy can be realized;Simple in construction, can improve operability and transmission effect Rate.
To achieve these goals, the present invention use a kind of excavator energy regenerating and utilize system, including variable liquid Press pump, the first control valve, the first oil cylinder, the second control valve, the second oil cylinder, hydraulic accumulator and overflow valve, volume adjustable hydraulic pump Oil-in be connected with fuel tank, the hydraulic fluid port A of oil-out and the first control valve connects;The hydraulic fluid port B of the first control valve and the first oil cylinder Rod chamber connect, the rodless cavity connection of the hydraulic fluid port C of the first control valve and the first oil cylinder;The hydraulic fluid port A and first of the second control valve The rodless cavity of oil cylinder connects, and the hydraulic fluid port B of the second control valve is connected by the hydraulic fluid port A of the first check valve and the second oil cylinder, the second oil The hydraulic fluid port B of cylinder is connected with the oil-in of hydraulic accumulator, overflow valve;The hydraulic fluid port C of the second control valve passes through the second check valve and liquid Pressure accumulator, the oil-in of overflow valve connect;The hydraulic fluid port D of the first control valve, the oil-out of overflow valve are connected with fuel tank;First oil Cylinder is boom cylinder, is used for driving excavator swing arm lifting work;When swing arm declines, the first oil cylinder is made to contract by the first control valve Returning, the first oil cylinder rodless cavity makes recovery fluid supercharging enter hydraulic accumulator through the second control valve, the second oil cylinder, it is achieved swing arm gesture Directly reclaiming of energy;When boom arm lift, drive according to the first Flow of Cylinder needs, control variable hydraulic pump and hydraulic accumulator First oil cylinder runs, it is achieved directly utilizing of movable arm potential energy.
Preferably, described variable delivery hydraulic pump delivery can be according to the needs of the first oil cylinder and the amount of hydraulic accumulator Automatically coupling is changed, meanwhile, the release uninterrupted of the hydraulic accumulator amount according to self and the row of volume adjustable hydraulic pump Amount size is controlled in real time by the second control valve.
Preferably, described second oil cylinder is pressurized cylinder, can be by the area ratio of A Yu A and the preacceleration inflation of hydraulic accumulator Power controls to be filled with the oil liquid pressure size of hydraulic accumulator.
Preferably, described second control valve is flow and directional control valve, can according to the output pressure of hydraulic accumulator and At first oil cylinder rodless cavity, the pressure of hydraulic fluid port A controls the output flow of hydraulic accumulator.
Operation principle:
During swing arm down maneuver, control the first control valve commutation, make the hydraulic fluid port A of the first control valve connect with hydraulic fluid port B.When When one cylinder rod chamber pressure reaches setting value, the hydraulic fluid port C of the first control valve connects with hydraulic fluid port D, volume adjustable hydraulic pump output fluid, Flow into the rod chamber of the first oil cylinder through hydraulic fluid port A, the hydraulic fluid port B of the first control valve, the rodless cavity fluid of the first oil cylinder flows out, and through the The hydraulic fluid port C of one control valve, hydraulic fluid port D flow back to fuel tank.When the first cylinder rod chamber pressure is not up to setting value, the first control valve Hydraulic fluid port C and hydraulic fluid port D disconnects, and controls the second control valve, makes the hydraulic fluid port A of the second control valve connect with hydraulic fluid port B, and volume adjustable hydraulic pump exports Fluid, flows into the rod chamber of the first oil cylinder through hydraulic fluid port A, the hydraulic fluid port B of the first control valve, and the rodless cavity fluid of the first oil cylinder flows out, And through hydraulic fluid port A, B of the second control valve, flowing into the hydraulic fluid port A of the second oil cylinder through first direction valve, fluid is from the hydraulic fluid port B of the second oil cylinder Exiting into hydraulic accumulator, the first oil cylinder is retracted, along with the oil increasing of entrance hydraulic accumulator, the pressure of hydraulic accumulator Increase.When meeting or exceeding the setting pressure of hydraulic accumulator, fluid flows back to fuel tank through overflow valve, here the oil of the second oil cylinder The pressure that pressure is hydraulic fluid port A of mouth B and the product of A1/A2 area ratio.
When swing arm promotes at a slow speed, the hydraulic fluid port A of the first control valve connects with hydraulic fluid port C, and hydraulic fluid port B connects with hydraulic fluid port D.Now, become Amount hydraulic pump output fluid, through hydraulic fluid port A, C of the first control valve, flows into the rodless cavity of the first oil cylinder, oil in the first cylinder rod chamber Liquid stream goes out, and flows back to fuel tank through hydraulic fluid port B, D of the first control valve, drives the first oil cylinder to stretch out, to promote at a slow speed excavator swing arm.
During swing arm fast lifting, control the first control valve and the second control valve, make the hydraulic fluid port A and hydraulic fluid port C of the first control valve Connection, the hydraulic fluid port C of the second control valve connects with hydraulic fluid port A.Now, volume adjustable hydraulic pump output fluid, flow through the first control valve and obtain oily Mouth A and hydraulic fluid port C, the fluid of hydraulic accumulator flows through hydraulic fluid port C and A of the second check valve, the second control valve, controls valve oil with first The fluid of mouth C converges the rodless cavity entering the first oil cylinder, drives the first oil cylinder 4 extending action, makes excavator swing arm rapid increase.
Compared with prior art, the present invention manipulates two oil cylinders and the work of hydraulic accumulator by the control of each control valve Make, it is achieved that the lifting of swing arm, be simultaneously achieved directly reclaiming and utilizing of movable arm potential energy, saved cost.Specifically, swing arm During decline, making the first oil cylinder retract by the first control valve, the first oil cylinder rodless cavity makes recovery through the second control valve, the second oil cylinder Fluid supercharging enters hydraulic accumulator, it is achieved directly reclaiming of movable arm potential energy;When boom arm lift, according to the first Flow of Cylinder need , control variable hydraulic pump and hydraulic accumulator drive the first oil cylinder to run, it is achieved directly utilizing of movable arm potential energy.Eventually through Valve directly reclaims and utilizes excavator swing arm potential energy, does not affect operability, and simple in construction, transmission efficiency are high.
Accompanying drawing explanation
Fig. 1 is the hydraulic schematic diagram of the present invention.
In figure: 1, fuel tank, 2, volume adjustable hydraulic pump, the 3, first control valve, the 4, first oil cylinder, the 5, second control valve, 6, first Check valve, the 7, second oil cylinder, the 8, second check valve, 9, hydraulic accumulator, 10, overflow valve.
Detailed description of the invention
The invention will be further described below in conjunction with the accompanying drawings.
As it is shown in figure 1, a kind of excavator energy regenerating and utilize system, including volume adjustable hydraulic pump the 2, first control valve 3, the One oil cylinder the 4, second control valve the 5, second oil cylinder 7, hydraulic accumulator 9 and overflow valve 10, the oil-in of volume adjustable hydraulic pump 2 and oil Case 1 connects, and the hydraulic fluid port A of oil-out and the first control valve 3 connects;The hydraulic fluid port B of the first control valve 3 and the rod chamber of the first oil cylinder 4 Connecting, the hydraulic fluid port C of the first control valve 3 and the rodless cavity of the first oil cylinder 4 connect;The hydraulic fluid port A of the second control valve 5 and the first oil cylinder 4 Rodless cavity connect, the hydraulic fluid port B of the second control valve 5 is connected with the hydraulic fluid port A of the second oil cylinder 7 by the first check valve 6, the second oil cylinder The hydraulic fluid port B of 7 is connected with the oil-in of hydraulic accumulator 9, overflow valve 10;The hydraulic fluid port C of the second control valve 5 passes through the second check valve 8 It is connected with the oil-in of hydraulic accumulator 9, overflow valve 10;The hydraulic fluid port D of the first control valve 3, oil-out and the fuel tank 1 of overflow valve 10 Connect;First oil cylinder 4 is boom cylinder, is used for driving excavator swing arm lifting work;When swing arm declines, by the first control valve 3 make the first oil cylinder 4 retract, and the first oil cylinder 4 rodless cavity makes recovery fluid supercharging enter hydraulic pressure through second control valve the 5, second oil cylinder 7 Accumulator 9, it is achieved directly reclaiming of movable arm potential energy;When boom arm lift, according to the first oil cylinder 4 flow needs, control variable liquid Press pump 2 and hydraulic accumulator 9 drive the first oil cylinder 4 to run, it is achieved directly utilizing of movable arm potential energy.
Preferably, the discharge capacity of described volume adjustable hydraulic pump 2 can be according to the needs of the first oil cylinder 4 and the energy of hydraulic accumulator 9 How many automatically changing coupling, meanwhile, the release uninterrupted of hydraulic accumulator 9 is according to self amount and volume adjustable hydraulic pump The displacement size of 2 is controlled in real time by the second control valve 5.
Preferably, described second oil cylinder 7 is pressurized cylinder, can pass through the area ratio of A1 with A2 and the pre-of hydraulic accumulator 9 Pressurising power controls to be filled with the oil liquid pressure size of hydraulic accumulator 9.
Preferably, described second control valve 5 is flow and directional control valve, can be according to the output pressure of hydraulic accumulator 9 The output flow of hydraulic accumulator 9 is controlled with the pressure of hydraulic fluid port A at the first oil cylinder 4 rodless cavity.
Work process (refers to Fig. 1):
During swing arm down maneuver, the first control valve 3 can be controlled and commutate, make the hydraulic fluid port A of the first control valve 3 connect with hydraulic fluid port B. When the pressure of the first oil cylinder 4 rod chamber reaches setting value, the hydraulic fluid port C of the first control valve 3 connects with hydraulic fluid port D, volume adjustable hydraulic pump 2 Output fluid, flows into the hydraulic fluid port B of the first oil cylinder 4 through hydraulic fluid port A, the hydraulic fluid port B of the first control valve 3 and enters the rod chamber of the first oil cylinder 4, First oil cylinder 4 rodless cavity fluid flows out through hydraulic fluid port A, flows back to fuel tank 1 through hydraulic fluid port C, the hydraulic fluid port D of the first control valve 3.When the first oil cylinder When 4 rod chamber pressure are not up to setting value, the hydraulic fluid port C and hydraulic fluid port D of the first control valve 3 disconnect, and control the second control valve 5, make the The hydraulic fluid port A of two control valves 5 connects with hydraulic fluid port B, and volume adjustable hydraulic pump 2 exports fluid, through the hydraulic fluid port A and hydraulic fluid port B of the first control valve 3, The hydraulic fluid port B flowing into the first oil cylinder 4 enters the rod chamber of the first oil cylinder 4, and the rodless cavity fluid of the first oil cylinder 4 flows out through hydraulic fluid port A, warp The hydraulic fluid port A of the second control valve 5, hydraulic fluid port B, first direction valve 6 flow into the hydraulic fluid port A of the second oil cylinder 7, and fluid is from the oil of the second oil cylinder 7 Mouth B exits into hydraulic accumulator 9, and the first oil cylinder 4 is retracted.Along with the oil increasing of entrance hydraulic accumulator 9, hydraulic accumulator The pressure of 9 increases;When meeting or exceeding the setting pressure of hydraulic accumulator 9, fluid flows back to fuel tank 1 through overflow valve 10, here The pressure that pressure is oil-in A of the oil-out B of the second oil cylinder 7 and the product of A1/A2 area ratio.
When swing arm promotes at a slow speed, the hydraulic fluid port A of the first control valve 3 connects with hydraulic fluid port C, and hydraulic fluid port B connects with hydraulic fluid port D.Now, become Amount hydraulic pump 2 exports the hydraulic fluid port A that fluid flows into the first oil cylinder 4 through hydraulic fluid port A, the hydraulic fluid port C of the first control valve 3 and enters the first oil cylinder 4 Rodless cavity, the rod chamber fluid of the first oil cylinder 4 through hydraulic fluid port the first oil cylinder 4 hydraulic fluid port B flow out, flow through the oil of the first control valve 3 Mouth B and hydraulic fluid port D, flows back to fuel tank 1, drives the first oil cylinder 4 to stretch out, to promote excavator swing arm.
During swing arm fast lifting, control the first control valve 3 and the second control valve 5, make hydraulic fluid port A and the oil of the first control valve 3 Mouth C connection, the hydraulic fluid port C of the second control valve 5 connects with hydraulic fluid port A.Now, volume adjustable hydraulic pump 2 exports fluid, flows through the first control valve The hydraulic fluid port A and hydraulic fluid port C of 3, the fluid of hydraulic accumulator 9 flows through hydraulic fluid port C, A of second check valve the 8, second control valve 5, with first The fluid of the hydraulic fluid port C of control valve 3 converges the hydraulic fluid port A entering the first oil cylinder 4, flows into the rodless cavity of the first oil cylinder 4, drives the first oil Cylinder 4 extending action, makes excavator swing arm rise.
From said structure, the present invention manipulates two oil cylinders and the work of hydraulic accumulator by the control of each control valve Make, it is achieved that the lifting of swing arm, be simultaneously achieved directly reclaiming and utilizing of movable arm potential energy, saved cost.Eventually through valve Directly reclaiming and utilize excavator swing arm potential energy, do not affect operability, simple in construction, transmission efficiency are high.

Claims (4)

1. an excavator energy regenerating and utilize system, it is characterised in that include volume adjustable hydraulic pump (2), the first control valve (3), the first oil cylinder (4), the second control valve (5), the second oil cylinder (7), hydraulic accumulator (9) and overflow valve (10),
The oil-in of volume adjustable hydraulic pump (2) is connected with fuel tank (1), and the hydraulic fluid port A of oil-out and the first control valve (3) connects;First The rod chamber of the hydraulic fluid port B of control valve (3) and the first oil cylinder (4) connects, the hydraulic fluid port C of the first control valve (3) and the first oil cylinder (4) Rodless cavity connects;
The rodless cavity of the hydraulic fluid port A of the second control valve (5) and the first oil cylinder (4) connects, and the hydraulic fluid port B of the second control valve (5) is by the One check valve (6) is connected with the hydraulic fluid port A of the second oil cylinder (7), the hydraulic fluid port B of the second oil cylinder (7) and hydraulic accumulator (9), overflow valve (10) oil-in connects;The hydraulic fluid port C of the second control valve (5) is by the second check valve (8) and hydraulic accumulator (9), overflow valve (10) oil-in connects;
The hydraulic fluid port D of the first control valve (3), the oil-out of overflow valve (10) are connected with fuel tank (1);
First oil cylinder (4) is boom cylinder, is used for driving excavator swing arm lifting work;When swing arm declines, control by first Valve (3) makes the first oil cylinder (4) retract, and the first oil cylinder (4) rodless cavity makes recovery fluid through the second control valve (5), the second oil cylinder (7) Supercharging enters hydraulic accumulator (9), it is achieved directly reclaiming of movable arm potential energy;When boom arm lift, according to the first oil cylinder (4) flow Needing, control variable hydraulic pump (2) and hydraulic accumulator (9) drive the first oil cylinder (4) to run, it is achieved the direct profit of movable arm potential energy With.
A kind of excavator energy regenerating the most according to claim 1 and utilize system, it is characterised in that described variable delivery hydraulic The discharge capacity of pump (2) can change coupling automatically according to the amount of the needs of the first oil cylinder (4) and hydraulic accumulator (9), meanwhile, The release uninterrupted of hydraulic accumulator (9) according to the displacement size of self amount and volume adjustable hydraulic pump (2) by the Two control valves (5) control in real time.
A kind of excavator energy regenerating the most according to claim 1 and utilize system, it is characterised in that described second oil cylinder (7) it is pressurized cylinder, can control to be filled with hydraulic energy-accumulating by the Preliminary pressure-filled of the area ratio of A1 Yu A2 and hydraulic accumulator (9) The oil liquid pressure size of device (9).
A kind of excavator energy regenerating the most according to claim 1 and utilize system, it is characterised in that described second controls Valve (5) is flow and directional control valve, can be according to oil at the output pressure of hydraulic accumulator (9) and the first oil cylinder (4) rodless cavity The pressure of mouth A controls the output flow of hydraulic accumulator (9).
CN201610778963.3A 2016-08-31 2016-08-31 A kind of excavator energy regenerating and utilize system Pending CN106223391A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201610778963.3A CN106223391A (en) 2016-08-31 2016-08-31 A kind of excavator energy regenerating and utilize system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201610778963.3A CN106223391A (en) 2016-08-31 2016-08-31 A kind of excavator energy regenerating and utilize system

Publications (1)

Publication Number Publication Date
CN106223391A true CN106223391A (en) 2016-12-14

Family

ID=58072065

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201610778963.3A Pending CN106223391A (en) 2016-08-31 2016-08-31 A kind of excavator energy regenerating and utilize system

Country Status (1)

Country Link
CN (1) CN106223391A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107524648A (en) * 2017-08-09 2017-12-29 太原科技大学 A kind of closed type energy-saving loop of excavator swing arm
CN113323072A (en) * 2021-06-16 2021-08-31 徐州阿马凯液压技术有限公司 Self-control multifunctional reversing valve group and hydraulic excavator carrying same

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040000141A1 (en) * 2002-06-26 2004-01-01 Shinobu Nagura Hydraulic energy recovering/regenerating apparatus
US20050196288A1 (en) * 2004-03-05 2005-09-08 Deere & Company, A Delaware Corporation. Closed circuit energy recovery system for a work implement
CN1958972A (en) * 2005-11-01 2007-05-09 李恒辉 Method for retrieving reciprocating potential energy of working machines and tools
CN102588396A (en) * 2012-03-09 2012-07-18 三一重机有限公司 Oil cylinder energy recovery and regeneration system
CN103615443A (en) * 2013-12-03 2014-03-05 三一汽车制造有限公司 Energy recovery hydraulic system and engineering machine
CN203821467U (en) * 2014-04-11 2014-09-10 上海派司尼科技发展有限公司 Hydraulic boom control system
CN104988963A (en) * 2015-06-18 2015-10-21 力士德工程机械股份有限公司 Hydraulic excavator movable arm potential energy recovery system
CN206467707U (en) * 2016-08-31 2017-09-05 徐州徐工挖掘机械有限公司 A kind of excavator energy regenerating and utilize system

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040000141A1 (en) * 2002-06-26 2004-01-01 Shinobu Nagura Hydraulic energy recovering/regenerating apparatus
US20050196288A1 (en) * 2004-03-05 2005-09-08 Deere & Company, A Delaware Corporation. Closed circuit energy recovery system for a work implement
CN1958972A (en) * 2005-11-01 2007-05-09 李恒辉 Method for retrieving reciprocating potential energy of working machines and tools
CN102588396A (en) * 2012-03-09 2012-07-18 三一重机有限公司 Oil cylinder energy recovery and regeneration system
CN103615443A (en) * 2013-12-03 2014-03-05 三一汽车制造有限公司 Energy recovery hydraulic system and engineering machine
CN203821467U (en) * 2014-04-11 2014-09-10 上海派司尼科技发展有限公司 Hydraulic boom control system
CN104988963A (en) * 2015-06-18 2015-10-21 力士德工程机械股份有限公司 Hydraulic excavator movable arm potential energy recovery system
CN206467707U (en) * 2016-08-31 2017-09-05 徐州徐工挖掘机械有限公司 A kind of excavator energy regenerating and utilize system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107524648A (en) * 2017-08-09 2017-12-29 太原科技大学 A kind of closed type energy-saving loop of excavator swing arm
CN113323072A (en) * 2021-06-16 2021-08-31 徐州阿马凯液压技术有限公司 Self-control multifunctional reversing valve group and hydraulic excavator carrying same

Similar Documents

Publication Publication Date Title
CN103148031B (en) Energy-saving control system of hydraulic movable arm loop
CN202081450U (en) Potential energy differential recovery system for moving arm of oil-liquid hybrid power excavator
CN107420384B (en) System is used in the storage of lifting device gravitional force P-V
CN104314131B (en) Excavator control system with oil hybrid power
CN104912138B (en) Hybrid power excavator movable arm potential energy recovery system and work method thereof
CN103896156B (en) A kind of hoist energy-saving hydraulic system and hoist
CN102094434A (en) System for differential recovery of potential energy of boom of oil liquid hybrid power excavating machine
CN104452850A (en) Method and control device for recycling potential energy of movable arm of excavator
CN206467707U (en) A kind of excavator energy regenerating and utilize system
CN206035914U (en) Four jar synchronous hydraulic system of automobile elevator
CN104452868B (en) Double-hydraulic-cylinder mixed drive control system
CN103671365B (en) A kind of energy recovery and reuse device
CN104988963A (en) Hydraulic excavator movable arm potential energy recovery system
CN205277958U (en) Dig hydraulic system of rig mast soon
CN102888876A (en) Energy regeneration structure of excavator and excavator
CN104328817A (en) Energy recovery system
CN106223391A (en) A kind of excavator energy regenerating and utilize system
CN204419736U (en) Hydraulic system
CN106223380B (en) A kind of hydraulic hybrid excavator system
CN105485078A (en) Energy recycling hydraulic system of rotary drilling rig mast derricking mechanism
CN103629175A (en) Working hopper hydraulic control system and engineering vehicle
CN1482359A (en) Vehicle mounted concrete transfer pump
CN103397679A (en) Movable arm energy-saving control system
CN204385793U (en) The control device that a kind of excavator swing arm potential energy is recycled
CN105697429B (en) Energy recovery control system and crane gear

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
RJ01 Rejection of invention patent application after publication
RJ01 Rejection of invention patent application after publication

Application publication date: 20161214