CN206668675U - Hydraulic system energy-recuperation system - Google Patents
Hydraulic system energy-recuperation system Download PDFInfo
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- CN206668675U CN206668675U CN201720463560.XU CN201720463560U CN206668675U CN 206668675 U CN206668675 U CN 206668675U CN 201720463560 U CN201720463560 U CN 201720463560U CN 206668675 U CN206668675 U CN 206668675U
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Abstract
The utility model provides a kind of hydraulic system energy-recuperation system, it includes hydraulic test unit and energy recovery unit, hydraulic test unit includes supply unit, hydraulic pump, controller, testing stand and separator, and energy recovery unit includes motor switch, hydraulic motor, generator, power dispenser, battery, the first electric quantity detection apparatus and the second electric quantity detection apparatus.Hydraulic motor is used to the pressure energy of hydraulic system being converted to kinetic energy, and generator is used to the kinetic energy of hydraulic motor being converted to electric energy, and power dispenser preferentially charges electric energy for the supply unit, and when supply unit is full of, power dispenser charges for battery.The utility model is on the basis of original hydraulic test unit is not changed, for warm before hydraulic system use, increase energy recovery unit, alternate test platform is as preheating load unit, it is electric energy by the unloaded energy conversion of testing stand, savings are got up to be used for laboratory's emergency set or illumination.
Description
Technical field
Hydraulic system field is the utility model is related to, more particularly to a kind of hydraulic system energy-recuperation system.
Background technology
In the engineer applied of hydraulic test, in order to allow hydraulic test to obtain good motion state, typically in equipment just
Often before application, equipment is first allowed first to carry out no-load running, referred to as system warm-up, when hydraulic system temperature reaches proper temperature,
Carry out the application of hydraulic test again, so not only protection equipment, and loading effect is more preferable, accuracy of detection is higher.
System warm-up process, equipment is different, and its preheating time length is also different.For example, the liquid for 600L, 3000psi
Potential source, using MAST hydraulic vibration gens, general 0.5 hour preheating time, hydraulic pressure preheating temperature is needed to 35 DEG C, it is assumed that hydraulic power source
Open two hydraulic pumps, two hydraulic pressure pump power 90kw, then warm need 45 degree of consumption electric.Due to being preheated in hydraulic system
During, equipment is in no-load running, without loading and detection project, except causing hydraulic system temperature to raise, Qi Taneng
Amount will be lost in the form of equipment operation, cause the loss of energy.
Utility model content
The defects of in order to overcome prior art, the utility model provide a kind of hydraulic system energy-recuperation system and side
Method, it can set energy recovery unit, the energy that energy recovery unit provides hydraulic pump in hydraulic system warm
Amount, by conversion, become electric energy, be stored in battery.
What the utility model was realized in：The utility model provides a kind of hydraulic system energy-recuperation system, and it is wrapped
Hydraulic test unit is included, the hydraulic test unit includes supply unit, hydraulic pump, controller, testing stand and separator, liquid
Pressure system also includes energy recovery unit with energy-recuperation system,
The energy recovery unit includes motor switch, hydraulic motor, generator, power dispenser, battery, the first electricity
Amount detecting device and the second electric quantity detection apparatus,
The supply unit is used to power for the testing stand and controller, described in the output end connection of the controller
The input of separator is controlled with the oil circuit branch to separator, and the output end of the hydraulic pump connects the separator
Input, the hydraulic pump are used to hydraulic oil being supplied to separator, and the output end of the separator connects the experiment respectively
The input of the input of platform and the motor switch, the separator are used to open hydraulic oil supplied to testing stand and motor
Close, the motor switch is used to be turned on and off the hydraulic motor, generator described in the output axis connection of the hydraulic motor
Input shaft, the hydraulic motor is used to the pressure energy of hydraulic system being converted to kinetic energy, and the generator is used for hydraulic pressure horse
The kinetic energy reached is converted to electric energy, and the output end of the generator is connected with the power dispenser, the power dispenser and institute
State and be provided with first circuit between supply unit, second electricity is provided between the power dispenser and the battery
Road, the battery are connected with the first electric quantity detection apparatus for detecting its electricity, and the supply unit is connected with for examining
The second electric quantity detection apparatus of its electricity is surveyed,
The output end of first electric quantity detection apparatus and the output end of second electric quantity detection apparatus connect respectively
The input of the controller, the output end of the controller connect the input of the motor switch and power dispenser respectively
End.
Preferably, first shaft coupling is provided with the output shaft of the hydraulic motor, is set on the input shaft of the generator
Second shaft coupling is equipped with, the first shaft coupling is connected with the second shaft coupling by pin.
Preferably, the motor switch is digital control hydraulic valve.
Preferably, the generator is direct current generator or alternating current generator, the parameter of the generator and the hydraulic motor
Match parameters.
Preferably, the output end connection external electric equipment of the battery.
Preferably, connected between hydraulic pump and separator by the first oil pipe, pass through second between separator and experimental bench
Oil pipe connects, and the oil pipe input port of testing stand is provided with the bottom of table top, passes through the 3rd oil pipe between separator and motor switch
Connection, connected between motor switch and hydraulic motor by the 4th oil pipe.
Compared with prior art, the utility model has the advantages that：
1. the utility model is on the basis of original hydraulic test unit is not changed, for pre- before hydraulic system use
Thermal process, increase energy recovery unit, alternate test platform external power supply is as preheating load unit, by the energy that testing stand is unloaded
Electric energy is converted to, savings are got up to be used for laboratory's emergency set or illumination.
2. the equipment in hydraulic test unit belongs to highly energy-consuming equipment, by using the energy recovery unit, Ke Yijie
About very big economic expenditure, reduces industrial consumption energy by technology, promotes the direction of industrial development.
3. the system principle is simple, cost is low, suitable for promoting, can save a large amount of electric energy.The idea is in current hydraulic pressure
Experiment field, not yet someone are expected using, and it is teach that a kind of new thinking and idea, beneficial to the sustainable of environment
Development, there is prominent contribution for this area.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model；
Fig. 2 is structural schematic block diagram of the present utility model；
Fig. 3 is the structural schematic block diagram of control system of the present utility model；
Fig. 4 is method flow schematic diagram of the present utility model；And
Fig. 5 is the schematic diagram of embodiment 1 of the present utility model.
Embodiment
Exemplary embodiment, feature and aspect of the present utility model are described in detail below with reference to accompanying drawing.It is identical in accompanying drawing
Reference represent the same or analogous element of function.Although the various aspects of embodiment are shown in the drawings, remove
Non-specifically point out, it is not necessary to accompanying drawing drawn to scale.
The utility model provides a kind of hydraulic system energy-recuperation system, and as shown in Figure 1 to Figure 3, it includes hydraulic pressure examination
Verification certificate member 1 and energy recovery unit 2.Energy recovery unit 2 is used to reclaim the waste heat of hydraulic test unit 1,
It is electric energy by the unloaded energy conversion of testing stand, savings are got up to be used for laboratory's emergency set or illumination.
Hydraulic test unit 1 includes supply unit 3, hydraulic pump 4, controller 5, testing stand 6 and separator 7, and energy returns
Receiving unit 2 includes motor switch 8, hydraulic motor 9, generator 10, power dispenser 11, the electric quantity detection apparatus of battery 12 first
13 and second electric quantity detection apparatus 14.
Controller 5 is arranged on console 51, and controller 5 is also associated with PC 50.
Supply unit 3 is that testing stand 6 and controller 5 are powered, the input of the output end connection separator 7 of controller 5
It is controlled with the oil circuit branch to separator 7.
Connected between hydraulic pump 4 and separator 7 by the first oil pipe 15, hydraulic pump is used for hydraulic oil is oily supplied to dividing
Device, connected between separator 7 and experimental bench 6 by the second oil pipe 16, the oil pipe input port of testing stand 6 is provided with the bottom of table top
Portion.Connected between separator 7 and motor switch 8 by the 3rd oil pipe 17, pass through the 4th between motor switch 8 and hydraulic motor 9
Oil pipe 18 connects.Separator 7 is used to hydraulic oil being supplied to testing stand 6 and motor switch 8, and motor switch 8 is used to open or close
Hydraulic motor 9, the input shaft of the output axis connection generator 10 of hydraulic motor 9 are closed, hydraulic motor 9 is used for the pressure of hydraulic system
Power can be converted to kinetic energy, and generator 10 is used to the kinetic energy of hydraulic motor 9 being converted to electric energy.
In actual applications, first shaft coupling is provided with the output shaft of hydraulic motor 9, is set on the input shaft of generator 10
Second shaft coupling is equipped with, first shaft coupling is connected with second shaft coupling by pin 101.Hydraulic motor 9 drives generator 10 to enter
Row generates electricity.
Power dispenser 11 is managed distribution to the electricity of generator 10, and electric energy is preferentially power supply by power dispenser 11
Device 3 charges, and when supply unit 3 is full of, power dispenser 11 is that battery is charged.In actual applications, battery
It could be arranged to multigroup, the output end connection external equipment of battery, for being powered for external equipment.For example, external equipment can
Think laboratory emergency set or lighting apparatus etc..
First circuit 111, power dispenser 11 and battery are provided between power dispenser 11 and supply unit 3
Second circuit 112 is provided between 111.Preferentially first second circuit 112 of cut-out of circuit 111 of connection is power dispenser
Supply unit 3 charges, and after for the charging complete of supply unit 3, power dispenser cuts off first circuit 111 and connects second electricity
Charged for battery on road 112.
Can thus realize supply unit 3 be constantly in can power supply state, at which in can power supply state when can not
With civil power is connected, without as existing hydraulic system, it is necessary to which moment connection civil power carrys out the examination for controller and testing stand
Equipment power supply is tested, has saved a large amount of electric energy.
Pass through cable connection between generator 10, power dispenser 11, battery 12 and supply unit 3.Controller 5
The input of output end connection separator is controlled with the oil circuit branch to separator.
First electric quantity detection apparatus 13, the output end of the second electric quantity detection apparatus 14 connect the input of controller 5, control
The input of the output end connection motor substation of device 5, the first electric quantity detection apparatus 13, the second electric quantity detection apparatus 14 will detect
Level signal send to control 5, controller 5 according to the level signal to motor switch 8 send be turned on and off signal, motor
Switch is turned on and off hydraulic motor 9 according to switching signal.
The input of the output end connection power dispenser 11 of controller 5, controller, which is worked as, receives the second electric power detection dress
When putting 14 low level signal, electric energy is preferably that supply unit is charged by the control power dispenser 11 of controller 5.
The second electric quantity detection apparatus 14, battery 12 and electric energy point are provided between supply unit 3 and power dispenser 11
The first electric quantity detection apparatus 13 is provided between orchestration 11, the second electric quantity detection apparatus 14 is used for the electricity for monitoring supply unit,
First electric quantity detection apparatus 13 is used for the electricity for monitoring battery 12.
First electric quantity detection apparatus 13 is internally provided with the first power threshold, and the second electric quantity detection apparatus 14 is internally provided with
The value of second power threshold, the first power threshold and the second power threshold is generally the 80%-100% of total electricity.It is preferred that
100%.
When the first electric quantity detection apparatus 13 detects that the electricity of battery 12 is examined less than the first power threshold and/or the second electricity
When survey device 14 detects that the electricity of supply unit 3 is less than power threshold, the first electric quantity detection apparatus 13 sends first to controller
Low level signal and/or the second electric quantity detection apparatus 14 send the second low level signal to controller 5, and controller 5 is receiving
After first low level signal and/or the second low level signal open signal is sent to motor switch 8.Motor switch 8 is receiving
Hydraulic motor 9 is opened after the open signal that controller is sent.
Also, as long as controller receives the second low level signal of the second electric quantity detection apparatus 14, regardless of whether receiving
To the first low level signal of the first electric quantity detection apparatus, controller 5 controls preferentially first circuit of connection of power dispenser 11
And it is that supply unit is charged to disconnect second circuit, the high level signal until receiving the second electric quantity detection apparatus 14,
Power dispenser 11 can just be controlled to disconnect first circuit communication, second circuit battery charging, to ensure supply unit pair
Pilot system is preheated.Under the work of the system, it can ensure that supply unit is continuously pilot system and preheated, not exist
Need to connect external power source, only accumulators store electric energy does not in itself need no longer for the use of remaining external equipment, preheating yet
External power source is connected, saves substantial amounts of electric energy.
When the first electric quantity detection apparatus 13 detects that the electricity of battery 12 is higher than the first power threshold and the second electric power detection
When device 14 detects that the electricity of supply unit 3 is higher than the second power threshold, the first electric quantity detection apparatus 13 and the second electric power detection
Device 14 sends high level signal to controller 5, and controller 5 persistently receives the first electric quantity detection apparatus within a period of time
13 and second electric quantity detection apparatus 14 send high level signal after, motor switch 8 close hydraulic motor 9 to cut off hydraulic pressure try
Verification certificate member 1 and energy recovery unit 2.Now, because supply unit and battery need not charge, therefore volume need not be collected
Outer energy, to realize to supply unit and the overload protection of battery.
Certainly, in actual applications, enterprising exercise of the internal electric network that battery can also be ined succession is used, to guarantee in time
The electricity collected to battery uses.It is also possible to metering module is connected on battery and supply unit, to power supply
Usage amount is recorded.
In the utility model, motor switch 8 is a kind of new digital control hydraulic valve, can there is very high switch speed
Degree, the flow for entering hydraulic motor can be controlled.
Generator 10 can be dc generator or alternating current generator, and its performance parameter should be with hydraulic motor
Match somebody with somebody, output voltage is 220 volts, for being generated electricity for battery and supply unit 3.
Power dispenser 11 is a kind of digital electric source switch, and preferential first circuit of connection disconnects second circuit to incite somebody to action
Electric energy imports supply unit, according to the electricity saturation signal of supply unit, judges whether electric energy importing battery, with preferentially full
The pre- hot function of sufficient pilot system.
Battery selects lead-acid accumulator, but is not limited to the type, and its composition includes mu balanced circuit, can be according to using need
Ask, export 0~24v DC voltages.
In a particular application, the model BM2/BMR-160 of hydraulic motor, the model of generator can be STC-10kw tri-
Be synchronised generator, and battery can be YD350L lead-acid batteries, the first electric quantity detection apparatus 13 and the second electric quantity detection apparatus
14 can be selected UTE1003A/UTE1010A Intelligent electric power quantity metering instruments, and controller can be programmable logic controller (PLC).
Preferably, the utility model also provides a kind of energy reclaiming method of hydraulic system, as shown in figure 4, it include with
Lower step：
S1, the first electric quantity detection apparatus detection battery electricity, the second electric quantity detection apparatus detect the electricity of supply unit
Amount；
S2, when the first electric quantity detection apparatus 13 detect the electricity of battery 12 less than the first power threshold and/or second electricity
When amount detecting device 14 detects that the electricity of supply unit 3 is less than power threshold, the first electric quantity detection apparatus 13 is sent to controller
First low level signal and/or the second electric quantity detection apparatus 14 send the second low level signal to controller 5, and controller 5 is to horse
Open signal is sent up to switch 8.Motor switch 8 opens hydraulic motor 9.
After S3, motor switch open the hydraulic motor, the hydraulic motor is converted to the pressure energy of hydraulic system dynamic
Can, the kinetic energy of hydraulic motor is converted to electric energy by the generator, when controller receives the of the second electric quantity detection apparatus 14
During two low level signals, regardless of whether receiving the first low level signal of the first electric quantity detection apparatus, controller 5 controls electric energy
Distributor 11 is preferably that supply unit is charged, the high level signal until receiving the second electric quantity detection apparatus 14, just meeting
Power dispenser 11 is controlled to be charged for battery, to ensure that supply unit 3 preheats to pilot system.
S4, detect that the electricity of battery 12 is examined higher than the first power threshold and the second electricity when the first electric quantity detection apparatus 13
When survey device 14 detects that the electricity of supply unit 3 is higher than the second power threshold, the first electric quantity detection apparatus 13 and the inspection of the second electricity
Survey device 14 and send high level signal, the closing hydraulic motor 9 of motor switch 8 hydraulic test list to cut off to controller 5 simultaneously
Member 1 and energy recovery unit 2.Now, because supply unit 3 and battery need not charge, therefore need not collect extra
Energy.
The method that above-mentioned energy recovery unit provides and meets off-energy during a kind of recovery hydraulic pressure system warm-up,
This method not only meets the demand of hydraulic system warm, and can reclaim the electric energy of loss, and availability test room is met an urgent need
Equipment or lighting apparatus use.
The utility model proposes energy recovery unit, kinetic energy or electric energy caused by hydraulic test unit can be entered one
Step is converted into other forms energy, such as heat energy, luminous energy etc., all in protection domain.
Operation principle of the present utility model is further explained with reference to embodiment：
As shown in figure 5, hydraulic oil is supplied to separator by hydraulic pump 4, hydraulic oil is supplied to the He of testing stand 6 by separator 7
Motor switch 8, motor switch 8 are used to be turned on and off hydraulic motor 9, the output axis connection generator 10 of hydraulic motor 9 it is defeated
Enter axle, hydraulic motor 9 is used to the pressure energy of hydraulic system being converted to kinetic energy, and generator 10 is used for the kinetic energy of hydraulic motor 9
Be converted to electric energy.
Power dispenser 11 is managed distribution to the electricity of generator 10, and electric energy is preferentially power supply by power dispenser 11
Device 3 charges, and when supply unit 3 is full of, power dispenser 11 is that battery is charged.In actual applications, battery
It could be arranged to multigroup, the output end connection external equipment of battery, for being powered for external equipment.
Pass through cable connection between generator 10, power dispenser 11, battery 12 and supply unit 3.Controller 5
The input of output end connection separator is controlled with the oil circuit branch to separator.
First electric quantity detection apparatus 13, the output end of the second electric quantity detection apparatus 14 connect the input of controller 5, control
The input of the output end connection motor substation of device 5, the first electric quantity detection apparatus 13, the second electric quantity detection apparatus 14 will detect
Level signal send to control 5, controller 5 according to the level signal to motor switch 8 send be turned on and off signal, motor
Switch is turned on and off hydraulic motor 9 according to switching signal.
The second electric quantity detection apparatus 14, battery 12 and electric energy point are provided between supply unit 3 and power dispenser 11
The first electric quantity detection apparatus 13 is provided between orchestration 11, the second electric quantity detection apparatus 14 is used for the electricity for monitoring supply unit,
First electric quantity detection apparatus 13 is used for the electricity for monitoring battery 12.
First electric quantity detection apparatus 13 is internally provided with the first power threshold, and the second electric quantity detection apparatus 14 is internally provided with
The value of second power threshold, the first power threshold and the second power threshold is the 100% of total electricity.
When the first electric quantity detection apparatus 13 detects that the electricity of battery 12 is examined less than the first power threshold and/or the second electricity
When survey device 14 detects that the electricity of supply unit 3 is less than power threshold, the first electric quantity detection apparatus 13 sends first to controller
Low level signal and/or the second electric quantity detection apparatus 14 send the second low level signal to controller 5, and controller 5 is opened to motor
Close 8 and send open signal.Motor switch 8 opens hydraulic motor 9.
When the first electric quantity detection apparatus 13 detects that the electricity of battery 12 is higher than the first power threshold and the second electric power detection
When device 14 detects that the electricity of supply unit 3 is higher than the second power threshold, the first electric quantity detection apparatus 13 and the second electric power detection
Device 14 sends high level signal, the closing hydraulic motor 9 of motor switch 8 hydraulic test unit 1 to cut off to controller 5 simultaneously
And energy recovery unit 2.Now, because supply unit and battery need not charge, therefore extra energy need not be collected
Amount.
When controller receives the second low level signal of the second electric quantity detection apparatus 14, controller 5 controls electric energy distribution
Device 11 is preferably that supply unit is charged, and the high level signal until receiving the second electric quantity detection apparatus 14, can just be controlled
Power dispenser 11 charges for battery, to ensure that supply unit preheats to pilot system.
Preferred embodiment of the present utility model is the foregoing is only, is not limited to the utility model, for this
For the technical staff in field, the utility model can have various modifications and variations.It is all in the spirit and principles of the utility model
Within, any modification, equivalent substitution and improvements made etc., it should be included within the scope of protection of the utility model.
Finally it should be noted that：Above-described each embodiment is merely to illustrate the technical solution of the utility model, rather than
It is limited；Although the utility model is described in detail with reference to the foregoing embodiments, one of ordinary skill in the art
It should be understood that：It can still modify to the technical scheme described in previous embodiment, or to which part or whole
Technical characteristic carries out equivalent substitution；And these modifications or substitutions, the essence of appropriate technical solution is departed from the utility model
The scope of each embodiment technical scheme.
Claims (7)
1. a kind of hydraulic system energy-recuperation system, it includes hydraulic test unit, and the hydraulic test unit includes power supply
Device, hydraulic pump, controller, testing stand and separator, it is characterised in that：Hydraulic system also includes energy with energy-recuperation system
Measure recovery unit,
The energy recovery unit includes motor switch, hydraulic motor, generator, power dispenser, battery, the inspection of the first electricity
Device and the second electric quantity detection apparatus are surveyed,
The supply unit is used to power for the testing stand and controller, described point of oil of output end connection of the controller
The input of device is controlled with the oil circuit branch to separator, and the output end of the hydraulic pump connects the input of the separator
End, the hydraulic pump are used to hydraulic oil being supplied to separator, and the output end of the separator connects the testing stand respectively
The input of input and the motor switch, the separator are used to hydraulic oil being supplied to testing stand and motor switch,
The motor switch is used to be turned on and off the hydraulic motor, and generator is defeated described in the output axis connection of the hydraulic motor
Enter axle, the hydraulic motor is used to the pressure energy of hydraulic system being converted to kinetic energy, and the generator is used for hydraulic motor
Kinetic energy is converted to electric energy, and the output end of the generator is connected with the power dispenser, the power dispenser and the electricity
First circuit is provided between source device, second circuit, institute are provided between the power dispenser and the battery
State battery and be connected with the first electric quantity detection apparatus for detecting its electricity, the supply unit is connected with for detecting its electricity
Second electric quantity detection apparatus of amount,
The output end of first electric quantity detection apparatus and the output end of second electric quantity detection apparatus connect described respectively
The input of controller, the output end of the controller connect the input of the motor switch and power dispenser respectively.
2. hydraulic system energy-recuperation system according to claim 1, it is characterised in that：The output of the hydraulic motor
First shaft coupling is provided with axle, second shaft coupling, the first shaft coupling and institute are provided with the input shaft of the generator
Second shaft coupling is stated to connect by pin.
3. hydraulic system energy-recuperation system according to claim 1, it is characterised in that：The motor switch is numeral
Control hydraulic valve.
4. hydraulic system energy-recuperation system according to claim 1, it is characterised in that：The generator is direct current
Machine or alternating current generator, the parameter of the generator and the match parameters of the hydraulic motor.
5. hydraulic system energy-recuperation system according to claim 1, it is characterised in that：The output end of the battery
Connect external electric equipment.
6. hydraulic system energy-recuperation system according to claim 1, it is characterised in that：The battery is arranged to more
Group.
7. hydraulic system energy-recuperation system according to claim 1, it is characterised in that：Between hydraulic pump and separator
Connected, connected between separator and experimental bench by the second oil pipe, the oil pipe input port of testing stand is provided with by the first oil pipe
The bottom of table top, connected between separator and motor switch by the 3rd oil pipe, by the between motor switch and hydraulic motor
Four oil pipes connect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720463560.XU CN206668675U (en) | 2017-04-28 | 2017-04-28 | Hydraulic system energy-recuperation system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720463560.XU CN206668675U (en) | 2017-04-28 | 2017-04-28 | Hydraulic system energy-recuperation system |
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| Publication Number | Publication Date |
|---|---|
| CN206668675U true CN206668675U (en) | 2017-11-24 |
Family
ID=60371446
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201720463560.XU Active CN206668675U (en) | 2017-04-28 | 2017-04-28 | Hydraulic system energy-recuperation system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109281876A (en) * | 2018-11-30 | 2019-01-29 | 博纳斯威阀门股份有限公司 | A kind of wind light mutual complementing electrohydraulic actuator |
| TWI778257B (en) * | 2019-04-30 | 2022-09-21 | 李受勳 | Hydraulic electric energy conversion device |
-
2017
- 2017-04-28 CN CN201720463560.XU patent/CN206668675U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109281876A (en) * | 2018-11-30 | 2019-01-29 | 博纳斯威阀门股份有限公司 | A kind of wind light mutual complementing electrohydraulic actuator |
| TWI778257B (en) * | 2019-04-30 | 2022-09-21 | 李受勳 | Hydraulic electric energy conversion device |
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