CN106988374A - A kind of excavator energy regenerating oil-supplementing system and its method - Google Patents
A kind of excavator energy regenerating oil-supplementing system and its method Download PDFInfo
- Publication number
- CN106988374A CN106988374A CN201710398207.2A CN201710398207A CN106988374A CN 106988374 A CN106988374 A CN 106988374A CN 201710398207 A CN201710398207 A CN 201710398207A CN 106988374 A CN106988374 A CN 106988374A
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- Prior art keywords
- valve
- rotary motor
- oil
- outlet
- reversal
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- 230000001172 regenerating effect Effects 0.000 title claims abstract description 31
- 238000000034 method Methods 0.000 title claims abstract description 11
- 230000008676 import Effects 0.000 claims abstract description 44
- 238000011084 recovery Methods 0.000 claims abstract description 23
- 239000002828 fuel tank Substances 0.000 claims abstract description 19
- 230000000694 effects Effects 0.000 claims abstract description 6
- 239000003921 oil Substances 0.000 claims description 46
- 239000012530 fluid Substances 0.000 claims description 36
- 239000013589 supplement Substances 0.000 claims description 5
- 230000008859 change Effects 0.000 claims description 4
- 239000010705 motor oil Substances 0.000 claims description 4
- 238000004891 communication Methods 0.000 claims description 3
- 230000009466 transformation Effects 0.000 claims 1
- 238000005516 engineering process Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000007659 motor function Effects 0.000 description 1
- 230000021715 photosynthesis, light harvesting Effects 0.000 description 1
- 238000005381 potential energy Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/22—Hydraulic or pneumatic drives
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/22—Hydraulic or pneumatic drives
- E02F9/2217—Hydraulic or pneumatic drives with energy recovery arrangements, e.g. using accumulators, flywheels
Abstract
The invention discloses a kind of excavator energy regenerating oil-supplementing system and its method, the system includes the first reversal valve, second reversal valve, first check valve, main pump, fuel tank, shuttle valve, pilot valve, recovery valve, accumulator, the oil inlet of main pump is connected with fuel tank, main pump outlet is connected with the first check valve inlet all the way, another road of main pump outlet is connected with the tunnel import of the second reversal valve the 3rd, guide's oil circuit is connected with first via import on the left of shuttle valve on the left of second reversal valve, guide's oil circuit is connected with first via import on the right side of shuttle valve on the right side of second reversal valve, second the first way outlet of reversal valve is connected for C mouthfuls with recovery valve, second the second way outlet of reversal valve is connected for D mouthfuls with recovery valve, valve outlet is reclaimed with accumulator to be connected.When rotary braking of the present invention and progress energy regenerating, rotary motor repairing is the minimum discharge repairing of main pump discharge using excavator when not working, and does not increase other energy sources, serves energy-saving effect.And increase element is less, simple system is reliable.
Description
Technical field
The present invention relates to excavator technical field, and in particular to a kind of excavator energy regenerating oil-supplementing system and its method.
Background technology
With developing rapidly for social economy, energy shortage and problem of environmental pollution are on the rise, and each state all will reduction
Energy loss, environmental protection are brought into schedule.Meanwhile, Energy Efficiency Ratio is one of key parameter of hydraulic crawler excavator market competition, therefore
The Study on energy saving of hydraulic crawler excavator and application are particularly necessary.
At present, the hydraulic hybrid power-saving technology based on excavator energy regenerating, mainly to excavator swing arm potential energy,
Rotary braking can be reclaimed, and the energy of recovery is stored by accumulator.Wherein rotation energy, which is reclaimed, mainly includes upper-part rotation
Braking and revolution start overflow two parts energy.Rotary braking and when not doing energy regenerating, the overflow fluid of rotary motor is through
Two overflow valves or the 3rd overflow valve and the second check valve or the 3rd check valve give rotary motor repairing, prevent motor is emptied from causing
Motor is damaged；When rotary braking and progress energy regenerating, the braking energy not overflow of rotary motor, and recovered valve reclaims storage
In accumulator, so cause the benefit low on fuel of rotary motor and be emptied, influence the recovery of rotation energy, in addition, utilizing
There is energy dissipation if doing the power source of rotary motor repairing in constant displacement pump.
The content of the invention
In order to overcome deficiency of the prior art, the invention provides a kind of excavator energy regenerating oil-supplementing system and its side
Method.
In order to solve the above-mentioned technical problem, the present invention is adopted the following technical scheme that：
A kind of excavator energy regenerating oil-supplementing system, including the first reversal valve, the second reversal valve, the first check valve, main pump, oil
Case, shuttle valve, pilot valve, recovery valve, accumulator, the second reversal valve are provided with three tunnel imports, three way outlets, left side guide's oil circuit and the right side
Side guide's oil circuit, the oil inlet of main pump is connected with fuel tank, and main pump outlet is connected with the first check valve inlet all the way, and main pump outlet is another
It is connected all the way with the tunnel import of the second reversal valve the 3rd, guide's oil circuit and first via import phase on the left of shuttle valve on the left of the second reversal valve
Even, guide's oil circuit is connected with first via import on the right side of shuttle valve on the right side of the second reversal valve, and second the first way outlet of reversal valve is with reclaiming
C mouthfuls of valve is connected, and second the second way outlet of reversal valve is connected for D mouthfuls with recovery valve, reclaims valve outlet and is connected with accumulator, recovery valve C
A mouthfuls with rotary motor of mouth is connected, and B mouthfuls with rotary motor of D mouthfuls of recovery valve is connected, the first one-way valved outlet and the second reversal valve second
Road import is connected, and fuel tank is connected with the second reversal valve first via import, and the way outlet of the second reversal valve the 3rd enters with the first reversal valve
Mouth is connected, and the first diverter valve outlet is connected with pressure-reducing valve import, and decompression valve outlet is connected for T mouthfuls with rotary motor, the first reversal valve
Right side guide's oil circuit is connected with side outlet on shuttle valve, and the way outlet of pilot valve first is connected with the second tunnel import on the left of shuttle valve, guide
The way outlet of valve second is connected with the second tunnel import on the right side of shuttle valve.
Preferably, also including adjuster, adjuster import is connected with main pump, adjuster outlet and the second reversal valve the 3rd
Way outlet is connected, and adjuster outlet is also connected with fuel tank.
Preferably, also include the first overflow valve and choke valve, the import of the choke valve first via and the tunnel of the second reversal valve the 3rd
Outlet is connected, and choke valve the second tunnel import is connected with adjuster, and the valve outlet that throttles is connected with fuel tank, the first overflow valve import and the
The way outlet of two reversal valve the 3rd is connected, and the first overflow valve outlet is connected with fuel tank.
Preferably, the rotary motor also includes the second check valve, the 3rd check valve, the second overflow valve, the 3rd overflow
Valve, the second overflow valve and the second check valve are connected for A mouthfuls with rotary motor, and the 3rd check valve and the 3rd overflow valve are with turning round horse
Up to B mouthfuls be connected, and the second check valve 31, the 3rd check valve 32, the second overflow valve 33 and the 3rd overflow valve 34 with rotary motor T
Mouth is connected.
Preferably, the pilot valve controls the second reversal valve.
Preferably, the pilot valve control shuttle valve, the shuttle valve controls the first reversal valve.
A kind of excavator energy regenerating oil supplement method, step is as follows：Start pilot valve, pilot valve sends pilot signal control
The commutation of the second reversal valve is made, after the commutation of the second reversal valve, the oil communication of main pump to rotary motor, while pilot valve sends control
Signal processed is delivered to the first reversal valve by the control of shuttle valve, and the first reversal valve commutates upon receipt of the signals, the first reversal valve
After commutation, the oil circuit of cut-out main pump to T mouthful of rotary motor, main pump discharge pressure oil commutates by the first check valve into second
Valve gives revolution motor oil mouthful A or B fluid, and rotary motor opposite side hydraulic fluid port fluid drives through the second reversal valve oil return, motor revolution
Excavator is rotated；During braking, after pilot valve is closed, the second reversal valve commutation, main pump is cut off to the oil circuit between rotary motor,
Revolution starts braking, because excavator inertia of getting on the bus is rotated further, the rotary motor hydraulic fluid port side fluid of previous oil-feed be pressurized by
High voltage variable low pressure, and opposite side fluid becomes high pressure by low pressure, when carrying out energy regenerating, rotary motor hydraulic fluid port high-pressure side fluid warp
Recovery valve hydraulic fluid port C and D be accumulator topping up without overflow, main pump discharge pressure oil passes through the second reversal valve, then is changed by first
To after valve, the T mouths that rotary motor is flowed into after being depressurized by pressure-reducing valve carry out repairing, it is to avoid be emptied.
Preferably, when rotary braking is without energy regenerating, rotary motor hydraulic fluid port high-pressure side fluid is through the 3rd overflow
Valve and the second check valve prevent from being emptied through the second overflow valve and the 3rd check valve to rotary motor low-pressure side repairing.
Preferably, rotary motor revolution and rotary braking by main pump to rotary motor repairing when, the first overflow
Valve is set up pressure signal with choke valve collective effect and acted on adjuster, is discharged by the change control main pump of adjuster
Hydraulic fluid flow rate.
Preferably, when rotary braking and progress energy regenerating, using excavator main pump minimum discharge to be mended for rotary motor
Oil.
The beneficial effects of the invention are as follows：
The present invention proposes a kind of new excavator energy regenerating oil-supplementing system.The system is main by reversal valve, pressure-reducing valve, shuttle valve structure
Into.When rotary braking and progress energy regenerating, the first reversal valve works in left position under spring force, main pump discharge pressure
Power oil is reached to rotary motor repairing after pressure-reducing valve is depressurized, then by the repairing mouthful T oil-feed rotary motors of rotary motor
Function.Rotary motor repairing is the minimum discharge repairing of main pump discharge using excavator when not working, and does not increase other energy
Source, serves energy-saving effect.And increase element is less, simple system is reliable.
Brief description of the drawings
Fig. 1 is the structural representation of the present invention.
Reference numerals list：
1-. recovery valves, 2- accumulators, 3- rotary motors, 4- pressure-reducing valves, the reversal valves of 5- first, 6- the first overflow valve 7- choke valves,
8- shuttle valves, 9- adjusters, 10- fuel tanks, 11- main pumps, the check valves of 12- first, the reversal valves of 13- second, 14- pilot valves, 31- second
Check valve, the check valves of 32- the 3rd, the overflow valves of 33- second, the overflow valves of 34- the 3rd.
Embodiment
The invention will be further described with reference to the accompanying drawings and detailed description：
Such as Fig. 1, a kind of excavator energy regenerating oil-supplementing system, including the first reversal valve 5, the second reversal valve 6, the first check valve
12nd, main pump 11, fuel tank 10, shuttle valve 8, pilot valve 14, recovery valve 1, accumulator 2, the first overflow valve 6, adjuster 9, choke valve 7,
Second check valve 31, the 3rd check valve 32, the second overflow valve 33, the 3rd overflow valve 34, the second reversal valve are provided with three tunnel imports, three
Way outlet, left side guide's oil circuit and right side guide's oil circuit, the oil inlet of main pump 11 are connected with fuel tank 10, main pump 11 export all the way with
The import of check valve 12 is connected, and main pump 11 exports another road and is connected with the tunnel import of the second reversal valve 13 the 3rd, and the second reversal valve 13 is left
Side guide's oil circuit is connected with the left side first via import of shuttle valve 8, the right side guide's oil circuit of the second reversal valve 13 and the right side first via of shuttle valve 8
Import is connected, and the way outlet of the second reversal valve 13 first is connected for 1C mouthfuls with recovery valve, and the way outlet of the second reversal valve 13 second is with reclaiming
1D mouthfuls of valve is connected, and the outlet of recovery valve 1 is connected with accumulator 2, and 3A mouthfuls with rotary motor of 1C mouthfuls of recovery valve is connected, 1B mouthfuls of recovery valve and
3B mouthfuls of rotary motor is connected, and the outlet of check valve 12 is connected with the tunnel import of the second reversal valve 13 second, the reversal valve of fuel tank 10 and second
13 first via imports are connected, and the way outlet of the second reversal valve 13 the 3rd is connected with the first via import of choke valve 7, the tunnel of choke valve 7 second
Import is connected with adjuster 9, and adjuster 9 is connected with main pump 11, and the outlet of choke valve 7 is connected with fuel tank 10, the second reversal valve 13 the
Three way outlets are connected with the import of the first overflow valve 6, and the outlet of the first overflow valve 6 is connected with fuel tank 10, the tunnel of the second reversal valve 13 the 3rd
Outlet is connected with the import of the first reversal valve 5, and the outlet of the first reversal valve 5 is connected with the import of pressure-reducing valve 4, the outlet of pressure-reducing valve 4 and revolution
3T mouthfuls of motor is connected, and guide's oil circuit is connected with side outlet on shuttle valve 8 on the right side of the first reversal valve, the way outlet of pilot valve 14 first and shuttle
The the second tunnel import of left side of valve 8 is connected, and the way outlet of pilot valve 14 second is connected with the second tunnel import of right side of shuttle valve 8.Second check valve
31 and second overflow valve 33 be connected for 3A mouthfuls with rotary motor, the 3rd check valve 32 and the 3rd overflow valve 34 with rotary motor B
Mouthful be connected, and the second check valve 31, the 3rd check valve 32, the second overflow valve 33 and the 3rd overflow valve 34 with T mouthfuls of rotary motor
It is connected.
Method using above-mentioned excavator energy regenerating recharging oil device is as follows：It is first so that A mouthfuls of oil-feed rotary motors are turned right as an example
First start pilot valve 14, pilot valve 14 sends pilot signal and controls the second reversal valve 13 to commutate, after reversal valve 13 commutates, main pump
11 arrive the oil communication of rotary motor 3, are delivered to first while pilot valve 14 sends control signal by the control of shuttle valve 8 and change
To valve 5, the first reversal valve 5 commutates upon receipt of the signals, after the commutation of the first reversal valve 5, on cut-out main pump 11 to rotary motor 3
T mouthfuls of oil circuits, the first overflow valve 6 is set up pressure signal with the collective effect of choke valve 7 and acted on adjuster 9, passes through adjuster 9
Change the hydraulic fluid flow rate that control main pump 11 is discharged, the discharge pressure of main pump 11 oil is changed by the first check valve 12 into second
The hydraulic fluid port A fluid of rotary motor 3 is supplied to valve 13, the hydraulic fluid port B fluid of rotary motor 3 is through the oil return of the second reversal valve 13, motor rotating belt
Dynamic excavator is rotated；After pilot valve 14 is closed, the second reversal valve 13 is commutated, and main pump 11 is cut to the oil circuit between rotary motor 3
Disconnected, revolution starts braking, and because excavator inertia of getting on the bus is rotated further, the hydraulic fluid port B sides fluid of rotary motor 3 is pressurized to be uprised by low pressure
Pressure, and hydraulic fluid port A side fluid is by high voltage variable low pressure, when carrying out energy regenerating, the hydraulic fluid port B sides high-voltage oil liquid of rotary motor 3 is recovered
Valve 1 hydraulic fluid port C and D be accumulator topping up without overflow, the discharge pressure of main pump 11 oil passes through the second reversal valve 13, then is changed by first
To after valve 5, the T mouths that rotary motor 3 is flowed into after being depressurized by pressure-reducing valve 4 carry out repairing, it is to avoid be emptied.The repairing of rotary motor 3 is
Using excavator when not working, the minimum discharge repairing that main pump 11 is discharged does not increase other energy sources, serves energy-conservation effect
Really.And increase element is less, simple system is reliable.If energy regenerating need not be carried out, accumulator 2 is closed, is closed after braking
All oil circuits of second reversal valve 12, now, the hydraulic fluid port B side high-voltage oil liquids of rotary motor 3 are through the 3rd overflow valve 34, the second check valve
31 prevent from being emptied to the low-pressure side repairing of rotary motor 3.
Technological means disclosed in the present invention program is not limited only to the technological means disclosed in above-mentioned embodiment, in addition to
Constituted technical scheme is combined by above technical characteristic.It should be pointed out that for those skilled in the art
For, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications are also considered as
Protection scope of the present invention.
Claims (10)
1. a kind of excavator energy regenerating oil-supplementing system, it is characterised in that including the first reversal valve, the second reversal valve, the first list
Three tunnel imports, three way outlets, left side are provided with to valve, main pump, fuel tank, shuttle valve, pilot valve, recovery valve, accumulator, the second reversal valve
Guide's oil circuit and right side guide's oil circuit, the oil inlet of main pump are connected with fuel tank, main pump outlet all the way with the first check valve inlet phase
Even, another road of main pump outlet is connected with the tunnel import of the second reversal valve the 3rd, guide's oil circuit and shuttle valve left side on the left of the second reversal valve
First via import is connected, and guide's oil circuit is connected with first via import on the right side of shuttle valve on the right side of the second reversal valve, the second reversal valve first
Way outlet is connected for C mouthfuls with recovery valve, and second the second way outlet of reversal valve is connected for D mouthfuls with recovery valve, reclaims valve outlet and accumulator
It is connected, A mouthfuls with rotary motor of C mouthfuls of recovery valve is connected, and B mouthfuls with rotary motor of D mouthfuls of recovery valve is connected, the first one-way valved outlet and the
Two reversal valve the second tunnel imports be connected, fuel tank is connected with the second reversal valve first via import, the way outlet of the second reversal valve the 3rd and
First reversal valve import is connected, and the first diverter valve outlet is connected with pressure-reducing valve import, depressurizes T mouthfuls of phases of valve outlet and rotary motor
Even, guide's oil circuit is connected with side outlet on shuttle valve on the right side of the first reversal valve, the way outlet of pilot valve first and the second tunnel on the left of shuttle valve
Import is connected, and the way outlet of pilot valve second is connected with the second tunnel import on the right side of shuttle valve.
2. excavator energy regenerating oil-supplementing system as claimed in claim 1, it is characterised in that also including adjuster, adjuster
Import is connected with main pump, and adjuster outlet is connected with the way outlet of the second reversal valve the 3rd, and adjuster outlet is also connected with fuel tank.
3. excavator energy regenerating oil-supplementing system as claimed in claim 2, it is characterised in that also including the first overflow valve and section
Valve is flowed, the import of the choke valve first via is connected with the way outlet of the second reversal valve the 3rd, and choke valve the second tunnel import is connected with adjuster,
Throttling valve outlet is connected with fuel tank, and the first overflow valve import is connected with the way outlet of the second reversal valve the 3rd, the first overflow valve outlet
It is connected with fuel tank.
4. excavator energy regenerating oil-supplementing system as claimed in claim 1, it is characterised in that the rotary motor also includes the
Two check valves, the 3rd check valve, the second overflow valve, the 3rd overflow valve, the second overflow valve and the second check valve with rotary motor A
Mouthful be connected, the 3rd check valve and the 3rd overflow valve are connected for B mouthfuls with rotary motor, and the second check valve 31, the 3rd check valve 32,
Second overflow valve 33 and the 3rd overflow valve 34 are connected for T mouthfuls with rotary motor.
5. excavator energy regenerating oil-supplementing system as claimed in claim 1, it is characterised in that the pilot valve control second is changed
To valve.
6. excavator energy regenerating oil-supplementing system as claimed in claim 1, it is characterised in that the pilot valve controls shuttle valve,
The shuttle valve controls the first reversal valve.
7. a kind of excavator energy regenerating oil supplement method, it is characterised in that step is as follows：Start pilot valve, pilot valve is sent
Pilot signal controls the commutation of the second reversal valve, after the commutation of the second reversal valve, the oil communication of main pump to rotary motor, while guide
Valve sends control signal and is delivered to the first reversal valve by the control of shuttle valve, and the first reversal valve commutates upon receipt of the signals,
After the commutation of first reversal valve, the oil circuit of cut-out main pump to T mouthfuls of rotary motor, main pump discharge pressure is oily, enters by the first check valve
Enter the second reversal valve and give revolution motor oil mouthful A or B fluid, rotary motor opposite side hydraulic fluid port fluid is through the second reversal valve oil return, horse
Excavator is driven to rotate up to revolution；During braking, after pilot valve is closed, the commutation of the second reversal valve, main pump is between rotary motor
Oil circuit is cut off, and revolution starts braking, because excavator inertia of getting on the bus is rotated further, the rotary motor hydraulic fluid port side of previous oil-feed
Fluid is pressurized by high voltage variable low pressure, and opposite side fluid becomes high pressure by low pressure, and when carrying out energy regenerating, rotary motor hydraulic fluid port is high
Press side fluid recovered valve oil mouthful C and D be accumulator topping up without overflow, main pump discharge pressure oil passes through the second reversal valve, then
After the first reversal valve, the T mouths that rotary motor is flowed into after being depressurized by pressure-reducing valve carry out repairing, it is to avoid be emptied.
8. excavator energy regenerating oil supplement method as claimed in claim 7, it is characterised in that when rotary braking is without energy
During recovery, rotary motor hydraulic fluid port high-pressure side fluid is single through the 3rd overflow valve and the second check valve or through the second overflow valve and the 3rd
Prevent from being emptied to rotary motor low-pressure side repairing to valve.
9. excavator energy regenerating oil supplement method as claimed in claim 7, it is characterised in that turn round and return in rotary motor
When the transformation of ownership is moved by main pump to rotary motor repairing, the first overflow valve sets up pressure signal with choke valve collective effect and acts on tune
Save on device, the hydraulic fluid flow rate discharged by the change control main pump of adjuster.
10. excavator energy regenerating oil supplement method as claimed in claim 7, it is characterised in that rotary braking and progress energy
During recovery, excavator main pump minimum discharge is used for rotary motor repairing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710398207.2A CN106988374A (en) | 2017-05-31 | 2017-05-31 | A kind of excavator energy regenerating oil-supplementing system and its method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710398207.2A CN106988374A (en) | 2017-05-31 | 2017-05-31 | A kind of excavator energy regenerating oil-supplementing system and its method |
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| CN106988374A true CN106988374A (en) | 2017-07-28 |
Family
ID=59421263
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710398207.2A Pending CN106988374A (en) | 2017-05-31 | 2017-05-31 | A kind of excavator energy regenerating oil-supplementing system and its method |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
| CN110043523A (en) * | 2018-01-17 | 2019-07-23 | 雷沃重工股份有限公司 | Prevent that being emptied hydraulic system and hydraulic system prevents being emptied method |
| CN111649023A (en) * | 2019-09-11 | 2020-09-11 | 中煤科工集团西安研究院有限公司 | Buffering oil supplementing system and method for electro-hydraulic double-control motor driving rotation system |
| CN112879391A (en) * | 2021-02-20 | 2021-06-01 | 潍柴动力股份有限公司 | Oil supplementing device and closed system |
| CN113464513A (en) * | 2021-07-21 | 2021-10-01 | 徐州徐工矿业机械有限公司 | Open type rotary oil supplementing system and oil supplementing method |
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| CN110043523A (en) * | 2018-01-17 | 2019-07-23 | 雷沃重工股份有限公司 | Prevent that being emptied hydraulic system and hydraulic system prevents being emptied method |
| CN110043523B (en) * | 2018-01-17 | 2022-01-21 | 潍柴雷沃重工股份有限公司 | Air suction prevention hydraulic system and air suction prevention method for hydraulic 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 |
| CN111649023A (en) * | 2019-09-11 | 2020-09-11 | 中煤科工集团西安研究院有限公司 | Buffering oil supplementing system and method for electro-hydraulic double-control motor driving rotation system |
| CN111649023B (en) * | 2019-09-11 | 2022-04-15 | 中煤科工集团西安研究院有限公司 | Buffering oil supplementing system and method for electro-hydraulic double-control motor driving rotation system |
| CN112879391A (en) * | 2021-02-20 | 2021-06-01 | 潍柴动力股份有限公司 | Oil supplementing device and closed system |
| CN113464513A (en) * | 2021-07-21 | 2021-10-01 | 徐州徐工矿业机械有限公司 | Open type rotary oil supplementing system and oil supplementing method |
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