CN107044455A - A kind of hydraulic accumulator pressure active control system and control method - Google Patents
A kind of hydraulic accumulator pressure active control system and control method Download PDFInfo
- Publication number
- CN107044455A CN107044455A CN201710187733.4A CN201710187733A CN107044455A CN 107044455 A CN107044455 A CN 107044455A CN 201710187733 A CN201710187733 A CN 201710187733A CN 107044455 A CN107044455 A CN 107044455A
- Authority
- CN
- China
- Prior art keywords
- pressure
- hydraulic accumulator
- hydraulic
- valve
- air
- 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.)
- Granted
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
- F15B1/02—Installations or systems with accumulators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/14—Energy-recuperation means
Abstract
The present invention discloses a kind of hydraulic accumulator pressure active control system and control method, including speed-sensitive switch air valve, pressurized cylinder, hydraulic accumulator, gas cylinder, bi-bit bi-pass air operated reversing valve, controller etc..When hydraulic accumulator, which is in fluid, reclaims state, the nitrogen entered with hydraulic oil in hydraulic accumulator, air bag is gradually pressed into gas cylinder by pressurized cylinder, realizes the active control to hydraulic accumulator pressure；When hydraulic accumulator is in fluid release conditions, the gases at high pressure of gas cylinder are entered in hydraulic accumulator air bag by speed-sensitive switch air valve, by the fluid ramming system loop of storage, to control hydraulic accumulator pressure to be in a steady state value.The present invention can realize the active control of hydraulic accumulator pressure, solve in fluid pressure type energy-recuperation system, the uncontrollable and incomplete problem of the oily release process of pressure recovery, improves energy recovery efficiency and utilization rate caused by hydraulic accumulator pressure is passively controlled.
Description
Technical field
The present invention relates to a kind of control pressurer system being characterized with electric hydraulic-pneumatic control technology, more particularly, to a kind of hydraulic pressure
Energy storage pressure active control system.
Background technology
With being on the rise for energy shortage in world wide and problem of environmental pollution, the energy regenerating of research engineering machinery
Have important practical significance.Hydraulic crawler excavator is a kind of larger engineering machinery of power ratio, but the overall utilization of its energy
It is relatively low, therefore Energy Recovery Technology has obtained the concern of each side.
According to the type of energy storage components, the energy regenerating form that engineering machinery occasion is applied at present is divided into electrically
Formula and fluid pressure type.Wherein fluid pressure type energy regenerating because its power density is big, can fast storage and release pressure oil, simple in construction
And research is widely applied, its energy-storage travelling wave tube mainly selects hydraulic accumulator, carries out energy using hydraulic accumulator at present
Recovery technology is more ripe, and suitable for the big occasion of the fluctuation of load.Fluid pressure type energy regenerating mode is widely used in mechanical arm
Decline potential energy to recycle.Its operation principle is：Hydraulic accumulator is connected with the rodless cavity of mechanical arm oil cylinder, works as mechanical arm
During decline, transform gravitational energy is the hydraulic energy of hydraulic cylinder rodless cavity, reclaims and stores into hydraulic accumulator；When mechanical arm rises
When, the hydraulic energy of hydraulic accumulator storage is directly released into hydraulic cylinder rodless cavity, service hoisting load, or is discharged into hydraulic pump
Oil-out, collaborates common driving load with hydraulic pump, to reduce hydraulic pressure pump power output, so as to realize the sharp again of recoverable energy
With.
In fluid pressure type energy regenerating mode, hydraulic accumulator rises main to the energy recovery efficiency and utilization ratio of system
Effect, when hydraulic accumulator is in energy recovery state, with the decline process of mechanical arm, hydraulic accumulator pressure gradually rises
Height, when pressure rise to mechanical arm gravity deficiency to overcome rodless cavity pressure when, the decrease speed of mechanical arm will be affected,
Therefore, to avoid mechanical arm decrease speed impacted, hydraulic accumulator highest pressure recovery generally can all be limited；Work as hydraulic energy-accumulating
When device is in energy release conditions, with the release of pressure oil, hydraulic accumulator pressure is gradually reduced, when hydraulic accumulator pressure
During less than hydraulic circuit pressure, the pressure oil stored by it is then difficult to discharge, the pressure one in some situations even loop
Start to be higher than hydraulic accumulator pressure, then the energy reclaimed is not released recycling, so as to have impact on energy recycling
Rate, meanwhile, the pressure oil of hydraulic accumulator storage is not discharged recycling timely, then influences whether next periodical energy
Organic efficiency, vicious circle is caused with this.Thus, current hydraulic accumulator pressure is passively controlled by system pressure, energy
Organic efficiency and reuse ratio are also restricted.
The content of the invention
In view of this, the present invention is directed to the pressure initiative control of hydraulic accumulator, and its main purpose is to provide one kind
Hydraulic accumulator pressure active control system, the system can effectively solve hydraulic accumulator and reclaim and discharge pressure by circuit pressure
The problem of being influenceed with gasbag pressure, improves fluid pressure type energy recovery efficiency and reuse ratio.
To achieve the above object, the present invention is using following technical scheme：
A kind of hydraulic accumulator pressure active control system, includes hydraulic accumulator (1), the first speed-sensitive switch air valve
(2), gas cylinder (3), the second speed-sensitive switch air valve (4), pressurized cylinder (5), air operated reversing valve (6), controller (7)；Wherein：
The oil suction chamber of the hydraulic accumulator (1) is connected with executive component energy regenerating end；First speed-sensitive switch air valve (2)
Airbag chamber of the P2 mouths of P1 mouthfuls and the second speed-sensitive switch air valve (4) with hydraulic accumulator (1) is connected；Second speed-sensitive switch air valve
(4) D2 mouths are connected with the big chamber of pressurized cylinder (5), the D3 mouths of bi-bit bi-pass air operated reversing valve (6)；First high-speed switch valve (2)
D1 mouths and air inlet of the small chamber with gas cylinder (3) of pressurized cylinder (5) be connected；The gas outlet of bi-bit bi-pass air operated reversing valve (6)
Communicated with air.
As a kind of preferred scheme, the first speed-sensitive switch air valve (2) is automatically controlled.
As a kind of preferred scheme, the second speed-sensitive switch air valve (4) is automatically controlled.
As a kind of preferred scheme, oil pocket and airbag chamber, the air inlet of gas cylinder (7) of hydraulic accumulator (5) are mounted on
Pressure sensor.
As a kind of preferred scheme, the big chamber and small chamber of pressurized cylinder are respectively arranged with displacement transducer.
The present invention has clear advantage and beneficial effect compared with prior art, specifically, by above-mentioned technical proposal
Understand：
By adding barometric control unit in the airbag chamber of hydraulic accumulator, control hydraulic accumulator airbag chamber gas with
Annexation between gas cylinder, so that active control hydraulic accumulator pressure.When hydraulic accumulator is in energy recovery state, profit
With the second speed-sensitive switch air valve and pressurized cylinder by the gas refill in hydraulic accumulator air bag into gas cylinder, so as to maintain hydraulic pressure to store
Energy device fluid chamber is in a constant setup pressure value, solves because of hydraulic accumulator pressure rise influence executive component speed behaviour
The weak point of performance is controlled, while improving the energy recovery efficiency of hydraulic accumulator.
When hydraulic accumulator is in pressure oil release conditions, with the release of hydraulic oil, hydraulic accumulator fluid chamber pressure
Power is gradually reduced, when pressure is less than Releasing loop pressure, then hydraulic accumulator will stop discharging hydraulic oil, now in gas cylinder
Gases at high pressure enter the airbag chamber of hydraulic accumulator by the first speed-sensitive switch air valve, and control hydraulic accumulator pressure is in constant
Pressure set points, it is to avoid the problem of pressure oil release is difficult, improve energy utilization rate.
More clearly to illustrate the architectural feature and effect of the present invention, come below in conjunction with the accompanying drawings with specific embodiment to this hair
It is bright to be described in detail：
Brief description of the drawings
Fig. 1 is the structure principle chart of the present invention；
Fig. 2 is the structure principle chart of the preferred embodiments of the invention；
Accompanying drawing identifier declaration：
1st, hydraulic accumulator 2, the first speed-sensitive switch air valve
3rd, gas cylinder 4, the second speed-sensitive switch air valve
5th, pressurized cylinder 6, bi-bit bi-pass air operated reversing valve
7th, controller 8, constant displacement pump
9th, overflow valve 10, check valve
11st, mechanical arm hydraulic cylinder
Embodiment
Shown in reference picture 2, that show the concrete structure of the preferred embodiments of the invention, include hydraulic accumulator
(1), the first speed-sensitive switch air valve (2), gas cylinder (3), the second speed-sensitive switch air valve (4), pressurized cylinder (5), bi-bit bi-pass is pneumatic changes
To valve (6), controller (7), constant displacement pump (8), overflow valve (9), check valve (10), mechanical arm hydraulic cylinder (11)；Wherein：
It is its remaining chamber outside telescopic airbag chamber, airbag chamber that the hydraulic accumulator (1), which includes side in a cavity, cavity,
Body portion is oil pocket.
The oil pocket of the hydraulic accumulator (1) is connected with mechanical arm hydraulic cylinder (11) rodless cavity, check valve (10)；Check valve
(10) oil inlet is connected with constant displacement pump (8) oil-out, overflow valve (9) oil inlet；Overflow valve (9) oil-out is connected with fuel tank；The
The P2 mouths of the P1 mouths of one speed-sensitive switch air valve (2) and the second speed-sensitive switch air valve (4) connect with the airbag chamber of hydraulic accumulator (1)
Connect；The D3 mouths of the D2 mouths of second speed-sensitive switch air valve (4) and the big chamber of pressurized cylinder (5), bi-bit bi-pass air operated reversing valve (6) connect
Connect；The air inlet of the D1 mouths of first high-speed switch valve (2) and the small chamber of pressurized cylinder (5) with gas cylinder (3) is connected；Bi-bit bi-pass gas
The gas outlet of dynamic reversal valve (6) is communicated with air.
Shown in reference picture 2, the operation principle that the present embodiment is described in detail is as follows：
The initial pressure pi3 of gas cylinder is the maximum working pressure (MWP) of hydraulic system.
Pressure oil recovery process：In hydraulic accumulator airbag chamber, the second high-speed switch valve (4) and pressurized cylinder (5), structure are set
Into the gasbag pressure adjustment unit of hydraulic accumulator (1) energy recovery process.Before mechanical arm hydraulic cylinder (11) declines, to hydraulic pressure
The blowing pressure p that accumulator (1) air bag preliminary filling one matches with energy-recuperation system；Mechanical arm hydraulic cylinder (11) declines process
In, the heavy load potential energy of mechanical arm lifting is converted into the pressure energy of hydraulic cylinder rodless cavity, into the oil pocket of hydraulic accumulator (1), passes
With the decline process of mechanical arm in system system, into hydraulic accumulator (1) pressure energy increase, while gasbag pressure also with
Rise, the decrease speed of mechanical arm is affected, and after gasbag pressure adjustment unit is added, passes through the increasing of pressurized cylinder (5)
Pressure is acted on so that the gas refill in air bag by controlling the break-make of the second high-speed switch valve (4), controls hydraulic pressure to gas cylinder (3)
Accumulator (1) gasbag pressure pi2 is consistently equal to preacceleration inflation force value p, has prevented hydraulic accumulator (1) gas during pressure recovery oil
Bag pressure power pi2 gradually rises, and the situation that the unnecessary hydraulic oil of recovery system can not be continued by causing hydraulic accumulator (1) occurs；Herein
During the first high-speed switch valve (2) be closed all the time, meanwhile, if the small chamber piston of pressurized cylinder (5) in removal process
Low order end position is reached, then now the second high-speed switch valve (4) is closed, air pressure adjustment unit does not work.
Pressure oil discharges process：In hydraulic accumulator (1) airbag chamber, the first high-speed switch valve (2) and gas cylinder (3), structure are set
The gasbag pressure adjustment unit of process is discharged into hydraulic accumulator (1) pressure oil.When mechanical arm rises, hydraulic accumulator (1)
Process is discharged in pressure oil, now, a) as pi1 ＜ pi2, the first high-speed switch valve (2) is closed, and hydraulic accumulator (1) is returned
The pressure oil of receipts can be realized by itself gasbag pressure to be discharged；B) as pi1 ＞ pi2, the first high-speed switch valve of control (2) leads to
It is disconnected, the gases at high pressure in gas cylinder (3) is entered hydraulic accumulator (1) air bag, pressure oil is pressed into loop, control hydraulic accumulator
(1) air cavity pressure p i2 is consistently greater than hydraulic system pressure pi1 certain values, realizes the smooth of hydraulic accumulator (1) pressure recovery oil
Release and the controllability of release process；Meanwhile, if the small chamber piston of pressurized cylinder (5) is not in low order end position, bi-bit bi-pass
The left position work of air operated reversing valve (6), if the small chamber piston of pressurized cylinder (5) is in low order end position, air operated reversing valve (10) is right
Position work, the big chamber of pressurized cylinder is communicated with air, realizes the reset of pressurized cylinder, in case the pressure oil in next cycle makes when reclaiming
With the second high-speed switch valve (4) is closed all the time in the process.
The present invention crosses and adds barometric control unit in hydraulic accumulator airbag chamber, real using the break-make of speed-sensitive switch air valve
Existing connection between air bag and gas cylinder, the increase for realizing gas using pressurized cylinder is recycled, and is overcome because of hydraulic accumulator energy storage pressure
Power increases the problem of influence energy recovery efficiency, realizes the purpose to hydraulic accumulator pressure active control.
The above described is only a preferred embodiment of the present invention, be not intended to limit the scope of the present invention,
Therefore any subtle modifications, equivalent variations and modifications that every technical spirit according to the present invention is made to above example, still
Belong in the range of technical solution of the present invention.
Claims (7)
1. a kind of hydraulic accumulator pressure active control system, it is characterised in that：Include hydraulic accumulator (1), first at a high speed
Switch air valve (2), gas cylinder (3), the second speed-sensitive switch air valve (4), pressurized cylinder (5), bi-bit bi-pass air operated reversing valve (6), control
Device (7)；Wherein：
It is remaining cavity portion outside telescopic airbag chamber, airbag chamber that the hydraulic accumulator (1), which includes side in a cavity, cavity,
It is divided into oil pocket；
The oil pocket of the hydraulic accumulator (1) is connected with executive component energy regenerating end；The P1 mouths of first speed-sensitive switch air valve (2) and
Airbag chamber of the P2 mouths of second speed-sensitive switch air valve (4) with hydraulic accumulator (1) is connected；Second speed-sensitive switch air valve (4)
D2 mouthfuls are connected with the big chamber of pressurized cylinder (5), the D3 mouths of bi-bit bi-pass air operated reversing valve (6)；The D1 mouths of first high-speed switch valve (2)
Air inlet with the small chamber of pressurized cylinder (5) with gas cylinder (3) is connected；The gas outlet of bi-bit bi-pass air operated reversing valve (6) and air
Communicate.
2. a kind of hydraulic accumulator pressure active control system according to claim 1, it is characterised in that：Described first is high
Speed switch air valve (2) is automatically controlled.
3. a kind of hydraulic accumulator pressure active control system according to claim 1, it is characterised in that：Described second is high
Speed switch air valve (4) is automatically controlled.
4. a kind of hydraulic accumulator pressure active control system according to claim 1, it is characterised in that：Hydraulic accumulator
(1) oil pocket and airbag chamber, the air inlet of gas cylinder (3) is mounted on pressure sensor.
5. a kind of hydraulic accumulator pressure active control system according to claim 1, it is characterised in that：Pressurized cylinder it is big
Chamber and small chamber are respectively arranged with displacement transducer.
6. a kind of hydraulic accumulator pressure Active Control Method, using the hydraulic accumulator pressure described in any one of claim 1 to 5
Advocate autocontrol system, method comprises the following steps：
Pressure oil recovery process：Before mechanical arm hydraulic cylinder (11) declines, to hydraulic accumulator (1) air bag preliminary filling one and energy
The blowing pressure p that recovery system matches；During mechanical arm hydraulic cylinder (11) declines, the heavy load potential energy conversion of mechanical arm lifting
For the pressure energy of hydraulic cylinder rodless cavity, into the oil pocket of hydraulic accumulator (1), with the decline of mechanical arm in legacy system
Journey, into the pressure energy increase of hydraulic accumulator (1), while gasbag pressure is also with rise, the decrease speed of mechanical arm by
Influence, after gasbag pressure adjustment unit is added, passes through the pressurization of pressurized cylinder (5) so that the gas in air bag is returned
Gas cylinder (3) is charged to, by controlling the break-make of the second high-speed switch valve (4), control hydraulic accumulator (1) gasbag pressure pi2 is all the time
Equal to preacceleration inflation force value p；
Pressure oil discharges process：When mechanical arm rises, hydraulic accumulator (1) is in pressure oil and discharges process, now,
A) as pi1 ＜ pi2, the first high-speed switch valve (2) is closed, and the pressure oil that hydraulic accumulator (1) is reclaimed can be by itself
Gasbag pressure realizes release；
B) as pi1 ＞ pi2, the first high-speed switch valve (2) break-make is controlled, the gases at high pressure in gas cylinder (3) is stored into hydraulic pressure
Energy device (1) air bag, loop is pressed to by pressure oil, and control hydraulic accumulator (1) air cavity pressure p i2 is consistently greater than hydraulic system pressure
Pi1 certain values, realize the smooth release of hydraulic accumulator (1) pressure recovery oil and discharge the controllability of process；Meanwhile, if supercharging
The small chamber piston of cylinder (5) is not in low order end position, then the left position work of bi-bit bi-pass air operated reversing valve (6), if pressurized cylinder (5)
Small chamber piston is in low order end position, then the right position work of air operated reversing valve (10), and the big chamber of pressurized cylinder communicates with air, realizes and increase
The reset of cylinder pressure, in case the pressure oil in next cycle is used when reclaiming, the second high-speed switch valve (4) is in all the time in the process
Closed mode.
7. a kind of hydraulic accumulator pressure Active Control Method as claimed in claim 6, it is characterised in that pressure oil was reclaimed
Cheng Zhong, the first high-speed switch valve (2) is closed all the time, meanwhile, if the small chamber piston of pressurized cylinder (5) is in removal process
Low order end position is reached, then now the second high-speed switch valve (4) is closed, air pressure adjustment unit does not work.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710187733.4A CN107044455B (en) | 2017-03-27 | 2017-03-27 | A kind of hydraulic accumulator pressure active control system and control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710187733.4A CN107044455B (en) | 2017-03-27 | 2017-03-27 | A kind of hydraulic accumulator pressure active control system and control method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107044455A true CN107044455A (en) | 2017-08-15 |
| CN107044455B CN107044455B (en) | 2018-08-10 |
Family
ID=59545204
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710187733.4A Active CN107044455B (en) | 2017-03-27 | 2017-03-27 | A kind of hydraulic accumulator pressure active control system and control method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107044455B (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108591189A (en) * | 2018-03-19 | 2018-09-28 | 徐州工业职业技术学院 | A kind of variable element accumulator control system and swing arm energy-saving hydraulic system |
| PL426071A1 (en) * | 2018-06-26 | 2019-01-28 | Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie | System and method for recovery of compressed gas waste energy |
| CN110118206A (en) * | 2019-05-27 | 2019-08-13 | 长沙理工大学 | A kind of new type hydraulic accumulator control loop |
| CN111577676A (en) * | 2020-05-27 | 2020-08-25 | 太原科技大学 | Double-leather-bag constant-pressure energy storage system |
| CN112558649A (en) * | 2020-12-02 | 2021-03-26 | 中国船舶重工集团公司七五0试验场 | Active and passive combined pressure balancing system and method for transducer |
| CN112594262A (en) * | 2020-12-16 | 2021-04-02 | 徐州徐工挖掘机械有限公司 | Energy recovery system for construction machine and construction machine |
| CN112743016A (en) * | 2020-12-30 | 2021-05-04 | 黎明压型机械有限公司 | High-speed keel machine |
| CN113309743A (en) * | 2021-07-30 | 2021-08-27 | 山东辛丁技术有限公司 | Hydraulic accumulator inflating device based on oil field petrochemical industry and inflating method thereof |
| CN115059128A (en) * | 2022-06-23 | 2022-09-16 | 江苏师范大学 | Lever pressure-regulating energy-saving device for recycling potential energy of movable arm of excavator and control method |
-
2017
- 2017-03-27 CN CN201710187733.4A patent/CN107044455B/en active Active
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108591189A (en) * | 2018-03-19 | 2018-09-28 | 徐州工业职业技术学院 | A kind of variable element accumulator control system and swing arm energy-saving hydraulic system |
| PL426071A1 (en) * | 2018-06-26 | 2019-01-28 | Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie | System and method for recovery of compressed gas waste energy |
| CN110118206A (en) * | 2019-05-27 | 2019-08-13 | 长沙理工大学 | A kind of new type hydraulic accumulator control loop |
| CN110118206B (en) * | 2019-05-27 | 2020-07-24 | 长沙理工大学 | Novel hydraulic accumulator control circuit |
| CN111577676A (en) * | 2020-05-27 | 2020-08-25 | 太原科技大学 | Double-leather-bag constant-pressure energy storage system |
| CN111577676B (en) * | 2020-05-27 | 2022-02-08 | 太原科技大学 | Double-leather-bag constant-pressure energy storage system |
| CN112558649A (en) * | 2020-12-02 | 2021-03-26 | 中国船舶重工集团公司七五0试验场 | Active and passive combined pressure balancing system and method for transducer |
| CN112594262A (en) * | 2020-12-16 | 2021-04-02 | 徐州徐工挖掘机械有限公司 | Energy recovery system for construction machine and construction machine |
| CN112743016A (en) * | 2020-12-30 | 2021-05-04 | 黎明压型机械有限公司 | High-speed keel machine |
| CN113309743A (en) * | 2021-07-30 | 2021-08-27 | 山东辛丁技术有限公司 | Hydraulic accumulator inflating device based on oil field petrochemical industry and inflating method thereof |
| CN113309743B (en) * | 2021-07-30 | 2021-10-08 | 山东辛丁技术有限公司 | Hydraulic accumulator inflating device based on oil field petrochemical industry and inflating method thereof |
| CN115059128A (en) * | 2022-06-23 | 2022-09-16 | 江苏师范大学 | Lever pressure-regulating energy-saving device for recycling potential energy of movable arm of excavator and control method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107044455B (en) | 2018-08-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107044455A (en) | A kind of hydraulic accumulator pressure active control system and control method | |
| Ge et al. | A novel hydraulic excavator boom driving system with high efficiency and potential energy regeneration capability | |
| CN202081450U (en) | Potential energy differential recovery system for moving arm of oil-liquid hybrid power excavator | |
| CN101435451B (en) | Movable arm potential energy recovery method and apparatus of hydraulic excavator | |
| CN201297307Y (en) | Hydraulic motor energy recycling system used as energy accumulator for hybrid electric engineering machinery | |
| CN201288722Y (en) | Energy recovery system of mixed power mechanical actuator | |
| CN102094434B (en) | System for differential recovery of potential energy of boom of oil liquid hybrid power excavating machine | |
| CN101408212A (en) | Energy recovery system of hybrid power engineering machinery actuating element | |
| CN101070864A (en) | Energy-store state-liquid driving device of secondary flow-regulation coupling hydraulic energy accumulator | |
| CN101408213A (en) | Energy recovery system of hybrid power engineering machinery energy accumulator-hydraulic motor | |
| CN102587444A (en) | Oil hybrid system for excavator with energy differential recovery | |
| CN108755794B (en) | Hydraulic excavator based on hydraulic-electric composite drive | |
| CN104912138B (en) | Hybrid power excavator movable arm potential energy recovery system and work method thereof | |
| CN201339206Y (en) | Movable arm potential energy recovery device of hybrid power hydraulic pressure excavating machine | |
| CN102561451B (en) | Energy optimization system for hydraulic excavator | |
| CN109797797B (en) | Torque coupling type excavator movable arm potential energy recycling and reusing system | |
| CN107089629B (en) | A kind of hybrid energy-storing hoisting system for engineering machinery | |
| CN210917542U (en) | Energy recovery system of electric excavator | |
| CN103697023A (en) | Electro-hydraulic energy recovery and release system for slewing brake of engineering machinery | |
| CN108978773A (en) | A kind of excavator Diversity dynamical system | |
| CN201506243U (en) | Hydro-electric composite energy storing device | |
| CN106223391A (en) | A kind of excavator energy regenerating and utilize system | |
| CN108978774B (en) | Series-parallel hybrid power system for excavator | |
| CN103397677B (en) | Based on hydraulic excavator movable arm loop and the control method thereof of hydraulic transformer | |
| CN107700576A (en) | Hydraulic crawler excavator action potential recycling system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |