CN103669462B - Mixing type hydraulic device - Google Patents
Mixing type hydraulic device Download PDFInfo
- Publication number
- CN103669462B CN103669462B CN201310431947.3A CN201310431947A CN103669462B CN 103669462 B CN103669462 B CN 103669462B CN 201310431947 A CN201310431947 A CN 201310431947A CN 103669462 B CN103669462 B CN 103669462B
- Authority
- CN
- China
- Prior art keywords
- mentioned
- regeneration
- generator
- hydraulic
- actuator
- 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.)
- Expired - Fee Related
Links
Landscapes
- Fluid-Pressure Circuits (AREA)
- Operation Control Of Excavators (AREA)
Abstract
The invention provides a kind of mixing type hydraulic device, the oil that returns the action of actuator not being made to the high pressure of contribution can reclaim as energy by this mixing type hydraulic device.This mixing type hydraulic device has: actuator (1,81A, 81B); To the hydraulic pump (3) of actuator (1,81A, 81B) transportation work oil; Regeneration is with hydraulic motor (102), and it is provided the working oil that will return from actuator (1,81A, 81B) to fuel tank; The generator (103) driven by regeneration hydraulic motor (102); And the main relief valve (21) of the discharge pressure of hydraulic control pump (3).The downstream of main relief valve (21) is connected with the upstream side of hydraulic motor (102) with regeneration.
Description
Technical field
The present invention relates to mixing type hydraulic device.
Background technology
In the past, in Japanese Unexamined Patent Publication 2012-82953 publication (patent document 1), mixing type hydraulic device was recorded.This mixing type hydraulic device have actuator, to above-mentioned actuator transportation work oil hydraulic pump, the regeneration hydraulic motor of the working oil that will return from above-mentioned actuator to fuel tank and the generator by above-mentioned regeneration fluid motor-driven are provided.
And the working oil that will return from above-mentioned actuator to fuel tank is supplied to regeneration hydraulic motor, is driven generator by regeneration hydraulic motor, can obtain recovered energy.
In addition, in above-mentioned mixing type hydraulic device in the past, the main relief valve of the discharge pressure controlling above-mentioned hydraulic pump is connected with fuel tank.
Therefore, such as, in the digging operation etc. of pan soil, the actuator for this operation carries out action hardly, is not given up in fuel tank by from main relief valve the working oil that the action of this actuator is made contributions.
Like this, in above-mentioned mixing type hydraulic device in the past, there is following problem:, actuator comparatively large at the load of external environment condition does not carry out action, a large amount of energy is given up with being wasted.
Prior art document
Patent document 1: Japanese Unexamined Patent Publication 2012-82953 publication
Summary of the invention
The problem that invention will solve
Therefore, problem of the present invention is to provide a kind of and can will returns not to the high pressure that the action of actuator is made contributions the mixing type hydraulic device that oil reclaims as energy.
For the means of dealing with problems
In order to solve above-mentioned problem, the feature of mixing type hydraulic device of the present invention is to have:
Actuator;
Hydraulic pump, it is to above-mentioned actuator transportation work oil;
Regeneration hydraulic motor, it is provided the working oil that will return from above-mentioned actuator to fuel tank;
Generator, it is by above-mentioned regeneration fluid motor-driven; And
Main relief valve, it controls the discharge pressure of above-mentioned hydraulic pump,
The downstream of above-mentioned main relief valve is connected with the upstream side of above-mentioned regeneration with hydraulic motor.
According to the mixing type hydraulic device of this invention, provide the working oil that will return from actuator to fuel tank to above-mentioned regeneration hydraulic motor.The downstream of above-mentioned main relief valve is connected with the upstream side of above-mentioned regeneration with hydraulic motor.
Thus, the working oil flowed out from above-mentioned main relief valve is supplied to above-mentioned regeneration hydraulic motor, or, this working oil is converged with the working oil returned from above-mentioned actuator, is recovered energy by above-mentioned regeneration hydraulic motor.
Therefore, it is possible to will not reclaim as energy the oil that returns of the high pressure that the action of above-mentioned actuator is made contributions.That is, when actuator does not carry out action due to operating environment, main relief valve carries out work, and the working oil from hydraulic pump almost all flows to regeneration hydraulic motor, even if therefore also can reclaim a large amount of energy at short notice.Such as, in 20 tons of excavators, in the excavation rotary manipulation pattern of standard, often open the relief valve of 1 second, there is the effect of the energy to engine load reduction about 1.5%.
In addition, the mixing type hydraulic device of an embodiment has:
Regeneration relief valve, itself and above-mentioned regeneration hydraulic motor are connected in parallel;
Inverter, it is connected with above-mentioned generator; And
Control device, its rotating speed via the above-mentioned generator of above-mentioned inverter control or moment of torsion.
According to the mixing type hydraulic device of this embodiment, regeneration relief valve and above-mentioned regeneration hydraulic motor are connected in parallel, therefore, it is possible to prevent from exceedingly flowing through the working oil provided to regeneration hydraulic motor, the fault of generator etc. can be prevented.
In addition, above-mentioned control device, via the rotating speed of inverter control generator or moment of torsion, can prevent the rotating speed of generator excessive thus.If the rotating speed of above-mentioned generator is excessive, then the load of generator increases, and heating also increases, and needs to take countermeasure of generating heat, can cause the rising of manufacturing cost.Therefore, prevent the rotating speed of above-mentioned generator excessive, the rising of manufacturing cost can be suppressed.
The effect of invention
According to the mixing type hydraulic device of this invention, the downstream of above-mentioned main relief valve is connected with the upstream side of above-mentioned regeneration with hydraulic motor, therefore, it is possible to will not reclaim as energy the oil that returns of the high pressure that the action of above-mentioned actuator is made contributions.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of the mixing type hydraulic device that one embodiment of the present invention is shown.
Fig. 2 is the curve map of the relation illustrated between the rotary speed of generator and the moment of torsion of generator.
Label declaration
1 revolution hydraulic motor (actuator)
2 direction switch valves
3 hydraulic pumps
4 motors
5 fuel tanks
7 hydraulic energy regeneration unit
8 revolving bodies
9 electro-motors
21 main relief valves
81A, 81B hydraulic cylinder (actuator)
101 regeneration relief valves
102 regeneration hydraulic motors
103 generators
104 inverters
105 electrical storage devices
106 rotation speed sensors
107 control device
Detailed description of the invention
Below, in more detail invention is described by illustrated embodiment.
Fig. 1 is the circuit diagram of the mixing type hydraulic device that one embodiment of the present invention is shown.As shown in Figure 1, above-mentioned mixing type hydraulic device have make the pivotal revolution hydraulic motor 1 of revolving body 8, the direction switch valve 2 that switches 6 port 3 positions of the gyratory directions of revolving body 8, to revolution hydraulic motor 1 transportation work oil hydraulic pump 3 and drive the motor 4 of hydraulic pump 3.Above-mentioned revolution hydraulic motor 1 is an example of actuator of the present invention.
In addition, above-mentioned mixing type hydraulic device has multiple hydraulic cylinder 81A, 81B, and above-mentioned hydraulic pump 3 is to each hydraulic cylinder 81A, 81B transportation work oil.At hydraulic pump 3 and be respectively provided with (not shown) cylinder transfer valve switched the working oil flowing to hydraulic cylinder 81A, 81B between hydraulic cylinder 81A, 81B.Multiple hydraulic cylinder 81A, 81B are examples of actuator of the present invention.Label 82A, 82B are sequence valves.
Above-mentioned hydraulic pump 3 is the hydraulic pumps such as gear pump, trochoid pump, vane pump, piston pump, and working oil sucks from fuel tank 5 and discharges by it.
Above-mentioned direction switch valve 2 is connected with hydraulic pump 3 via the 1st pipe arrangement 51, and is connected with revolution hydraulic motor 1 via the 2nd and the 3rd pipe arrangement 52,53.This direction switch valve 2 has the 1st and the 2nd pilot pressure receiving portion 2a, 2b, and the 1st pilot pressure receiving portion 2a is connected with pilot valve 6 via the 1st guide's pipe arrangement 61, and on the other hand, the 2nd pilot pressure receiving portion 2b is connected with pilot valve 6 via the 2nd guide's pipe arrangement 62.1st and the 2nd pilot pressure receiving portion 2a, 2b accept first pilot, and the position of direction switch valve 2 switches to dextrorotation position (position on the right side in figure) or left-handed position (position in the left side in figure) from the neutral position figure thus.In addition, above-mentioned pilot valve 6 is connected with not shown pioneer pump.
In above-mentioned neutral position, the 1st port P1 and the 4th port P4 is interconnected, and the 2nd port P2, the 3rd port P3, the 5th port P5 and the 6th port P6 are in off-state.Now, the working oil of being discharged by hydraulic pump 3 after by the 1st, the 4th port P1, P4, flows through and returns fuel tank 5 in the 4th, the 5th pipe arrangement 54,55.
In above-mentioned dextrorotation position, the 2nd port P2 and the 6th port P6 is interconnected, and the 3rd port P3 and the 5th port P5 is interconnected, and the 1st port P1 and the 4th port P4 is in off-state.Now, the working oil of being discharged by hydraulic pump 3 after by the 2nd, the 6th port P2, P6, flows through and supplies revolution hydraulic motor 1 in the 3rd pipe arrangement 53.
In above-mentioned left-handed position, the 2nd port P2 and the 5th port P5 is interconnected, and the 3rd port P3 and the 6th port P6 is interconnected, and the 1st port P1 and the 4th port P4 is in off-state.Now, the working oil of being discharged by above-mentioned hydraulic pump 3 after by the 2nd, the 5th port P2, P5, flows through and supplies revolution hydraulic motor 1 in the 2nd pipe arrangement 52.
Above-mentioned 1st pipe arrangement 51 is provided with the 1st flap valve (checkvalve) 11.On the 1st pipe arrangement 51, between the 1st flap valve 11 and hydraulic pump 3, be connected with the above-mentioned cylinder transfer valve of the flowing of the working oil switching each hydraulic cylinder 81A, 81B.
One end of the 6th pipe arrangement 56 is connected with between above-mentioned 1st flap valve 11 and above-mentioned hydraulic pump 3.Above-mentioned 6th pipe arrangement 56 is provided with main relief valve 21.That is, main relief valve 21 is connected to above-mentioned direction switch valve 2 and between above-mentioned cylinder transfer valve and hydraulic pump 3.
Above-mentioned main relief valve 21 makes the pressure of the working oil in the 1st pipe arrangement 51 be no more than predetermined value.That is, the discharge pressure of main relief valve 21 hydraulic control pump 3.
Above-mentioned 2nd pipe arrangement 52 is connected with one end of the 7th, the 8th pipe arrangement 57,58, and the other end of the 3rd pipe arrangement 53 and the 7th, the 8th pipe arrangement 57,58 is connected.Above-mentioned 7th pipe arrangement 57 is provided with the 1st, the 2nd sequence valve 22,23, makes the pressure of the working oil in the 2nd, the 3rd pipe arrangement 52,53 be no more than predetermined value (such as 28MPa).On the other hand, above-mentioned 8th pipe arrangement 58 is provided with the 2nd, the 3rd flap valve 12,13, and making does not become vacuum in the 2nd, the 3rd pipe arrangement 52,53.
Above-mentioned 1st sequence valve 22 has the inflow entrance be connected with the 2nd pipe arrangement 52 via the 7th pipe arrangement 57, and discharges the outlet opening of the working oil flowed into from this inflow entrance.The working oil of discharging from this outlet opening flows to the 9th pipe arrangement 59.
Above-mentioned 2nd sequence valve 23 has the inflow entrance be connected with the 3rd pipe arrangement 53 via the 7th pipe arrangement 57, and discharges the flow export of the working oil flowed into from this inflow entrance.The working oil of discharging from this outlet opening flows to the 9th pipe arrangement 59.
In addition, above-mentioned mixing type hydraulic device adopts so-called hydraulic shunting mode, has the hydraulic energy regeneration unit 7 kinergety of the working oil flowed out from revolution hydraulic motor 1 being converted to electric flux.This hydraulic energy regeneration unit 7 has regeneration relief valve 101, regeneration hydraulic motor 102, generator 103, inverter 104, electrical storage device 105, rotation speed sensor 106 and control device 107.
One end that above-mentioned regeneration relief valve 101 is located at the 9th pipe arrangement the 59,9th pipe arrangement 59 is connected between the 1st sequence valve 22 and the 2nd sequence valve 23.Thus, the above-mentioned regeneration inflow entrance of relief valve 101 is connected via the outlet opening of the 9th pipe arrangement 59 with the 7th pipe arrangement 57 and the 1st, the 2nd sequence valve 22,23.The pressure set points of this regeneration relief valve 101 is set to the pressure set points lower than the 1st, the 2nd sequence valve 22,23.Such as, if the pressure set points of above-mentioned 1st, the 2nd sequence valve 22,23 is set as 28MPa, then the pressure set points of regeneration relief valve 101 is set as 21MPa.
Above-mentioned regeneration hydraulic motor 102 accepts the supply of working oil, drives generator 103.Regeneration pipe arrangement 108 is located at by this regeneration hydraulic motor 102, and is connected in parallel with regeneration relief valve 101.That is, between above-mentioned regeneration hydraulic motor 102 outlet opening that is connected to the 1st, the 2nd sequence valve 22,23 and the inflow entrance of regeneration relief valve 101.
Above-mentioned inverter 104 is connected with generator 103, and controls the frequency being supplied to the electric current of generator 103.By changing frequency, rotating speed or the moment of torsion of generator 103 can be controlled, the generated energy of adjustment generator 103.
Above-mentioned electrical storage device 105 is connected with generator 103 via inverter 104, and accumulates the electric power generated electricity by generator 103.This electric power is used by not shown electric installation, can obtain energy-saving effect.
Above-mentioned rotation speed sensor 106 detects the rotary speed of generator 103.In addition, the signal of the rotary speed representing the generator 103 detected is sent to control device 107 by above-mentioned rotation speed sensor 106.
Above-mentioned control device 107 controls rotating speed or the moment of torsion of generator 103 via inverter 104.More particularly, above-mentioned control device 107, according to the signal from rotation speed sensor 106, transmits control signal to inverter 104.
In addition, in above-mentioned hydraulic energy regeneration unit 7, converge from the working oil of multiple hydraulic cylinder 81A, 81B and the working oil of regeneration hydraulic motor 102 upstream side.
That is, in above-mentioned 9th pipe arrangement 59, arrange connector at the position of the one end being connected with regeneration pipe arrangement 108, this connector connects multiple hydraulic cylinder 81A, 81B via cylinder pipe arrangement 71.
The downstream of above-mentioned main relief valve 21 is connected with the upstream side of above-mentioned regeneration with hydraulic motor 102.That is, the other end of above-mentioned 6th pipe arrangement 56 is connected with cylinder pipe arrangement 71.
Fig. 2 is the curve map of the relation illustrated between the rotary speed of above-mentioned generator 103 and the moment of torsion of generator 103.
The rotating speed of generator 103 that above-mentioned control device 107 carries out or the control of moment of torsion carry out in the mode that can obtain the solid line in curve map.More particularly, when the rotary speed of generator 103 reaches R1 from 0, the moment of torsion of adjustment generator 103, makes the moment of torsion of generator 103 roughly certain.Further, when the rotary speed of generator 103 reaches R2, the moment of torsion of generator 103 is sharply increased, suppress the increase of the rotary speed of generator 103.
In addition, when the rotary speed of above-mentioned generator 103 reaches R2, the moment of torsion of generator 103 is T2, but this T2 corresponds to the pressure set points of regeneration relief valve 101.Therefore, when making the moment of torsion of generator 103 sharply increase, regeneration relief valve 101 is opened.
Accordingly, above-mentioned control device 107 controls the rotating speed of generator 103 via inverter 104, and the rotary speed of generator 103 can be prevented thus excessive.
If the rotary speed of above-mentioned generator 103 is excessive, then will the heating of generator 103 be caused to increase, thus need to take countermeasure of generating heat, cause the rising of manufacturing cost.
Therefore, prevent the rotary speed of above-mentioned generator 103 excessive, the rising of manufacturing cost can be prevented.
In addition, above-mentioned control device 107, according to the rotary speed of the generator 103 detected by rotation speed sensor 106, controls rotating speed or the moment of torsion of generator 103, therefore, it is possible to control the generated energy of generator 103 accurately.
In addition, above-mentioned control device 107 is according to the rotary speed of the generator 103 detected by rotation speed sensor 106, and control rotating speed or the moment of torsion of generator 103, the response of therefore this control can be good.
According to the mixing type hydraulic device of said structure, provide the working oil that will return from actuator (above-mentioned revolution hydraulic motor 1 or above-mentioned hydraulic cylinder 81A, 81B) to fuel tank 5 to above-mentioned regeneration hydraulic motor 102.The downstream of above-mentioned main relief valve 21 is connected with the upstream side of above-mentioned regeneration with hydraulic motor 102.
Thus, the working oil flowed out from above-mentioned main relief valve 21 is supplied to above-mentioned regeneration hydraulic motor 102, or, this working oil is converged with the working oil returned from above-mentioned actuator 1,81A, 81B, is recovered energy by above-mentioned regeneration hydraulic motor 102.
Therefore, it is possible to will not reclaim as energy the oil that returns of the high pressure that the action of above-mentioned actuator 1,81A, 81B is made contributions.Namely, when actuator 1,81A, 81B do not carry out action due to operating environment, main relief valve 21 carries out work, and the working oil from hydraulic pump almost all flows to regeneration hydraulic motor 102, even if therefore also can reclaim a large amount of energy at short notice.Such as, in 20 tons of excavators, in the excavation rotary manipulation pattern of standard, often open the relief valve of 1 second, there is the effect of the energy to engine load reduction about 1.5%.
In addition, above-mentioned regeneration hydraulic motor 102 is connected in parallel with regeneration relief valve 101, therefore, it is possible to prevent from exceedingly flowing through the working oil provided to regeneration hydraulic motor 102, can prevent the fault of generator 103 grade.
In addition, above-mentioned control device 107 controls rotating speed or the moment of torsion of generator 103 via inverter 104, and the rotating speed of generator 103 can be prevented thus excessive.If the rotating speed of generator 103 is excessive, then the load of generator 103 increases, and heating also increases, and needs to take countermeasure of generating heat, can cause the rising of manufacturing cost.Therefore, the excessive rising that can suppress manufacturing cost of the rotating speed of generator 103 is prevented.
In addition, the effect of other structure is identical with the effect of the structure described in Japanese Unexamined Patent Publication 2012-82953 publication, and therefore the description thereof will be omitted.
In addition, this invention is not limited to above-mentioned embodiment, can carry out design alteration in the scope not changing purport of the present invention.
Such as, also can arrange pressure sensor to replace above-mentioned rotation speed sensor 106, in this situation, pressure sensor detects the pressure of the working oil between the outlet opening of the 1st, the 2nd sequence valve 22,23 and the inflow entrance of regeneration relief valve 101.And control device 107, according to the pressure signal from pressure sensor, controls rotating speed or the moment of torsion of generator 103 via inverter 104.
In addition, also can arrange flow transmitter to replace above-mentioned rotation speed sensor 106, in this situation, flow transmitter detects by the flow of regeneration with the working oil of hydraulic motor 102.And control device 107, according to the flow of the working oil detected by flow transmitter, controls rotating speed or the moment of torsion of generator 103 via inverter 104.
In addition, as the actuator of above-mentioned revolution hydraulic motor 1 or above-mentioned hydraulic cylinder 81A, 81B, can be 1, or also can be multiple.
Claims (2)
1. a mixing type hydraulic device, is characterized in that, this mixing type hydraulic device has:
Actuator (1,81A, 81B);
Hydraulic pump (3), it is to above-mentioned actuator (1,81A, 81B) transportation work oil;
Regeneration is with hydraulic motor (102), and it is provided the working oil that will return from above-mentioned actuator (1,81A, 81B) to fuel tank;
Generator (103), it is driven by above-mentioned regeneration hydraulic motor (102); And
Main relief valve (21), it controls the discharge pressure of above-mentioned hydraulic pump (3),
The downstream of above-mentioned main relief valve (21) is connected with the upstream side of above-mentioned regeneration with hydraulic motor (102).
2. mixing type hydraulic device according to claim 1, is characterized in that, this mixing type hydraulic device has:
Regeneration relief valve (101), itself and above-mentioned regeneration hydraulic motor (102) are connected in parallel;
Inverter (104), it is connected with above-mentioned generator (103); And
Control device (107), it controls rotating speed or the moment of torsion of above-mentioned generator (103) via above-mentioned inverter (104).
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012209802A JP2014066259A (en) | 2012-09-24 | 2012-09-24 | Hybrid type hydraulic device |
| JP2012-209802 | 2012-09-24 | ||
| JPJP2012-209802 | 2012-09-24 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103669462A CN103669462A (en) | 2014-03-26 |
| CN103669462B true CN103669462B (en) | 2016-04-27 |
Family
ID=50308175
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310431947.3A Expired - Fee Related CN103669462B (en) | 2012-09-24 | 2013-09-22 | Mixing type hydraulic device |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2014066259A (en) |
| CN (1) | CN103669462B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6244459B2 (en) * | 2014-06-26 | 2017-12-06 | 日立建機株式会社 | Work machine |
| JP6605242B2 (en) * | 2015-07-08 | 2019-11-13 | 株式会社神戸製鋼所 | Hydraulic drive device for work machine |
| CN106545534A (en) * | 2016-01-21 | 2017-03-29 | 徐工集团工程机械股份有限公司 | Potential energy recycle and reuse system and rotary drilling rig |
| CN106958561B (en) * | 2017-03-21 | 2019-01-11 | 杭州蓝力电动科技有限公司 | Dual power supply type engineering machinery |
| DE102021001733A1 (en) * | 2021-04-03 | 2022-10-06 | Hydac Fluidtechnik Gmbh | contraption |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101091065A (en) * | 2005-06-06 | 2007-12-19 | 新履带牵引车三菱有限公司 | Fluid pressure circuit, energy recovery device, and fluid pressure recovery circuit for working machine |
| JP2012082953A (en) * | 2010-09-17 | 2012-04-26 | Daikin Industries Ltd | Hybrid type hydraulic device |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001197785A (en) * | 1999-11-04 | 2001-07-19 | Shin Caterpillar Mitsubishi Ltd | Circuit device |
| JP2003049809A (en) * | 2001-08-07 | 2003-02-21 | Hitachi Constr Mach Co Ltd | Pressure oil energy recovering device and construction machine with the same |
| US7596893B2 (en) * | 2005-06-06 | 2009-10-06 | Caterpillar Japan Ltd. | Work machine |
-
2012
- 2012-09-24 JP JP2012209802A patent/JP2014066259A/en active Pending
-
2013
- 2013-09-22 CN CN201310431947.3A patent/CN103669462B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101091065A (en) * | 2005-06-06 | 2007-12-19 | 新履带牵引车三菱有限公司 | Fluid pressure circuit, energy recovery device, and fluid pressure recovery circuit for working machine |
| JP2012082953A (en) * | 2010-09-17 | 2012-04-26 | Daikin Industries Ltd | Hybrid type hydraulic device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2014066259A (en) | 2014-04-17 |
| CN103669462A (en) | 2014-03-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103097746B (en) | Hydraulic energy regenerating unit | |
| CN103669462B (en) | Mixing type hydraulic device | |
| KR101652112B1 (en) | Hybrid Excavator Boom Actuator System and its Control Method | |
| CN102877495B (en) | Hybrid power system for recovering potential energy of movable arm of excavating machine | |
| US20060090462A1 (en) | Energy regeneration system for working machinery | |
| US7401464B2 (en) | Energy regeneration system for machines | |
| KR101568440B1 (en) | Controller of hybrid construction machine | |
| KR101568441B1 (en) | Controller of hybrid construction machine | |
| CN103255790B (en) | Electric hydraulic excavator sharing direct-current bus | |
| KR101595584B1 (en) | Controller of hybrid construction machine | |
| CN104314131B (en) | Excavator control system with oil hybrid power | |
| CN108425893A (en) | A kind of distributed direct drive excavator hydraulic system of servo motor driving bivariate pump | |
| CN107235440B (en) | A kind of liquid electricity mixing energy conserving system for lifting mechanism | |
| CN106088208B (en) | Excavator turns round hydraulic control system | |
| KR20110009118A (en) | Device for controlling hybrid construction machine | |
| CN102493523B (en) | Novel excavator current-limiting control system | |
| CN104981572A (en) | Working machine | |
| CN108708423A (en) | A kind of multi executors circuit of liquid electricity combination drive | |
| CN208330867U (en) | A kind of distributed direct drive excavator hydraulic system of servo motor driving bivariate pump | |
| JP2007162458A (en) | Energy regeneration system for work machine | |
| CN105473874A (en) | Construction machine | |
| CN106480926B (en) | A kind of electric hydraulic excavating machine | |
| CN103437392B (en) | Hybrid power hydraulic excavator system and using method | |
| CN202745096U (en) | Hybrid power system capable of recycling potential energy of movable arm of excavator | |
| US20150267381A1 (en) | Boom driving system for hybrid excavator and control method therefor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160427 Termination date: 20200922 |