AU2018268620B2 - Automatic-pressure-matching energy utilization system - Google Patents

Automatic-pressure-matching energy utilization system Download PDF

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Publication number
AU2018268620B2
AU2018268620B2 AU2018268620A AU2018268620A AU2018268620B2 AU 2018268620 B2 AU2018268620 B2 AU 2018268620B2 AU 2018268620 A AU2018268620 A AU 2018268620A AU 2018268620 A AU2018268620 A AU 2018268620A AU 2018268620 B2 AU2018268620 B2 AU 2018268620B2
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Prior art keywords
pressure
energy
synchronous motor
utilization system
working
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AU2018268620A1 (en
Inventor
Peng Dai
Qinghua He
Saibai LI
Changsheng Liu
Zhongyong TANG
Minwang WU
Daqing Zhang
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Sunward Intelligent Equipment Co Ltd
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Sunward Intelligent Equipment Co Ltd
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/02—Systems essentially incorporating special features for controlling the speed or actuating force of an output member
    • F15B11/028—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the actuating force
    • F15B11/032—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the actuating force by means of fluid-pressure converters
    • 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
    • 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
    • E02F9/2278—Hydraulic circuits
    • E02F9/2296—Systems with a variable displacement pump
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
    • F15B1/02—Installations or systems with accumulators
    • F15B1/024—Installations or systems with accumulators used as a supplementary power source, e.g. to store energy in idle periods to balance pump load
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
    • F15B21/14—Energy-recuperation means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/205—Systems with pumps
    • F15B2211/2053—Type of pump
    • F15B2211/20538—Type of pump constant capacity
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/205—Systems with pumps
    • F15B2211/2053—Type of pump
    • F15B2211/20546—Type of pump variable capacity
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/21—Systems with pressure sources other than pumps, e.g. with a pyrotechnical charge
    • F15B2211/212—Systems with pressure sources other than pumps, e.g. with a pyrotechnical charge the pressure sources being accumulators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/21—Systems with pressure sources other than pumps, e.g. with a pyrotechnical charge
    • F15B2211/214—Systems with pressure sources other than pumps, e.g. with a pyrotechnical charge the pressure sources being hydrotransformers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/705—Output members, e.g. hydraulic motors or cylinders or control therefor characterised by the type of output members or actuators
    • F15B2211/7051—Linear output members
    • F15B2211/7053—Double-acting output members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/705—Output members, e.g. hydraulic motors or cylinders or control therefor characterised by the type of output members or actuators
    • F15B2211/7058—Rotary output members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/71—Multiple output members, e.g. multiple hydraulic motors or cylinders
    • F15B2211/7114—Multiple output members, e.g. multiple hydraulic motors or cylinders with direct connection between the chambers of different actuators
    • F15B2211/7128—Multiple output members, e.g. multiple hydraulic motors or cylinders with direct connection between the chambers of different actuators the chambers being connected in parallel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/76—Control of force or torque of the output member
    • F15B2211/761—Control of a negative load, i.e. of a load generating hydraulic energy
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/80—Other types of control related to particular problems or conditions
    • F15B2211/88—Control measures for saving energy

Abstract

An automatic-pressure-matching energy utilization system, comprising a synchronous motor (1), a control valve (2), a working pump (3), an energy accumulator (4), a pressure actuator (5), and corresponding oil path connections. A master outlet (OUT) of the synchronous motor is connected to a load holding chamber of the pressure actuator; a first inlet (IN1) of the synchronous motor is connected to an oil port end of the energy accumulator by means of a first switch valve (K1) of the control valve; a second inlet (IN2) of the synchronous motor is connected to an output port of the working pump by means of a second switch valve (K2) of the control valve. The system can automatically match the output pressure between the working pump and the energy accumulator in accordance with the size of the external load, thereby fully utilizing pressure energy recovered in the energy accumulator.

Description

PRESSURE SELF-MATCHING ENERGY UTILIZATION SYSTEM
[0001] The present application claims the priority to Chinese Patent Application No.
201710343343.1, titled PRESSURE SELF-MATCHING ENERGY UTILIZATION SYSTEM, 5 filed on May 16, 2017 with the Chinese Patent Office, which is incorporated herein by reference in its entirety.
TECHNICAL FIELD
[0002] The present disclosure relates to a hydraulic utilization system for recycling energy of 0 a construction machinery working device, and in particular to a pressure self-matching energy utilization system.
BACKGROUND
[0003] It is to be understood that, if any prior art is referred to herein, such reference does 5 not constitute an admission that the prior art forms a part of the common general knowledge in the art, in Australia or any other country.
[0004] For environmental protection and energy saving, machine manufacturers in the construction machinery industry perform research work on energy recycling and utilization of a 20 mechanical equipment, and put forward a lot of methods and principles for energy recycling and utilization, such as an oil-electric hybrid power mode and an oil-liquid hybrid power mode. Because of the high price and low reliability of a motor battery which is a key component in the oil-electric hybrid power mode and a general energy saving effect of a product using this mode, the oil-electric hybrid power mode is abandoned in the industry. At present, the focus of 25 industry research is on the technology of the oil-liquid hybrid power mode. A difficulty of this technology is how to make the recycled energy be utilized efficiently and be well matched with a load. There are two common methods in the industry. A first method is to use recycled energy to drive a pressure cylinder to pressurize oil drawn from a tank and then store the pressurized oil into an energy accumulator. An initial pressure of the oil when stored into the energy
12328667_1 (GHMatters) P110068.AU
English translation of PCT/CN2018/083257
2018268620 04 May 2020 accumulator is higher than the maximum working pressure that may occur in a working device, otherwise the oil in the energy accumulator is not completely released and used because the pressure of the oil is lower than the driving pressure required in the working device. A second method is to use the recycled energy to drive a secondary element to pressurize the oil drawn 5 from the tank and then store the pressurized oil into the energy accumulator. During use, the pressure of oil in the energy accumulator is used to drive the secondary element to draw oil from the tankin order to drive the working device. It can be seen from these two methods that the first method has a poor press matching. Because the initial pressure of the oil in the energy accumulator is higher than the maximum working pressure that may occur in the working 0 device, energy of the pressure oil in the energy accumulator corresponding to a pressure higher than the maximum working pressure will be lost in a form of heat when the oil is released. The second method has a good pressure matching. However the second method has a low transmission efficiency. The secondary element is not well developed. There are conversions both in a process of storing the recycled energy into the energy accumulator and in a process of 5 releasing the recycled energy in the energy accumulator for usage, thus a total efficiency is not more than 45%.
SUMMARY
[0005] In order to avoid the disadvantages in the conventional art, a pressure self-matching 20 energy utilization system is provided according to the disclosure. The pressure self-matching energy utilization system has a simple structure, few transmission links and a high transmission efficiency, to economically and efficiently recycle energy.
[0006] A pressure self-matching energy utilization system includes a synchronous motor, a control valve, a working pump, an energy accumulator and a pressure actuation element and 25 corresponding oil pipe connection. A main outlet OUT of the synchronous motor is connected to a load keeping cavity of the pressure actuation element. A first inlet IN 1 of the synchronous motor is connected to an oil port of the energy accumulator via a first switch valve KI of the control valve. A second inlet IN2 of the synchronous motor is connected to an output port of the working pump via a second switch valve K2 of the control valve.
- 2 12328667_1 (GHMatters) P110068.AU
English translation of PCT/CN2018/083257
[0007] Furthermore, the synchronous motor has no low pressure drain port, an accumulating pressure of the energy accumulator is represented as Px, a working pressure of the working pump is represented as Pb, a demand pressure of the actuation element is represented as Pn wherein, the pressure self-matching energy utilization system works under a condition of, 5 Px+Pb>2Pn and Px<2Pn. In this way, the working pressure of the working pump continuously raises from a no-load pressure until the output pressure Pb>2Pn-Px. At this time, the synchronous motor starts to rotate, outputs pressurized oil from both the first inlet IN 1 and the second inlet IN2 to the pressure actuation element, and the pressure actuation element lifts a working device. The synchronous motor functions as a pressure distributor, which reduces the 0 high pressure and increases the low pressure. The synchronous motor compensates a pressure
Pn-Px, by which the working pump is higher than a load, to the energy accumulator to drive the load by the working pump and the energy accumulator. A lift speed of the load depends on an output flow of the working pump. Since the synchronous motor has no drain port, all working ports have a high pressure and volumetric efficiency of the synchronous motor 1 is close to 5 100%. Thus total transmission efficiency is more than 90% and an energy utilization rate is high. These methods and parameters are the preferred embodiments for implement this disclosure.
[0008] The pressure actuation element may be one or more oil cylinders and/or one or more hydraulic motors. The load keeping cavity of the pressure actuation element is further 0 connected to a descending control device, the descending control device is configured to control the pressure actuation element to control descending of a working device. The oil port of the energy accumulator is further connected to an energy accumulating control device, the energy accumulating control device is configured to charge energy to be recycled into the energy accumulator.
[0009] The working pump may be a fixed displacement pump or a variable displacement pump.
[0010] A switch valve control signal of the control valve is a hydraulic signal and/or an electrical signal.
[0011] The beneficial effects of the disclosure are described as follows. In the present
- 3 12328667_1 (GHMatters) P110068.AU
English translation of PCT/CN2018/083257
2018268620 04 May 2020 disclosure, a torque pressure transformation principle of the synchronous motor and a characteristic of the working pump that the working pressure depends on the load are used. When the pressure of the energy accumulator cannot drive the pressure actuation element, the working pressure of the working pump is continuously raised from a low pressure. The 5 synchronous motor performs pressure distribution, and compensates the pressure of the working pump higher than that of the load to the energy accumulator to drive the load by the working pump and the energy accumulator. By the pressure self-matching, purposes of utilizing the energy accumulator for recycling energy to replace an oil pump to do work to outside and reducing an input power of a prime motor and reducing fuel consumption are achieved. The 0 system according to this disclosure has a simple structure, few transmission links and a high transmission efficiency, and the system use common elements which are well developed and which are reliable. The system according to this disclosure is suitable for lifting and rotating of construction machinery and agricultural equipment working devices, especially for lifting of swing arms of excavator type devices.
BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 is a schematic principle view of a system according to the disclosure.
[0013] 1 synchronous motor
OUT main outlet
4 energy accumulator
INI first inlet IN2 second inlet control valve 3 working pump pressure actuation element
DETAILED DESCRIPTION
[0014] The present disclosure is described below in detail in conjunction with the drawings and embodiments.
[0015] An energy utilization process of an energy accumulator is described as follows. As illustrated in Figure 1, when an actuation element 5 lifts a working device, a first switch valve KI and a second switch valve K2 of a control valve 2 are switched on, a switch valve K is
- 4 12328667_1 (GHMatters) P110068.AU
English translation of PCT/CN2018/083257
2018268620 04 May 2020 switched off. Pressure oil in the energy accumulator 4 is transmitted to a first inlet INI of a synchronous motor 1, oil in the working pump 3 is transmitted to a second inlet IN2 of the synchronous motor 1. In this case, the synchronous motor 1 performs automatic matching based on an accumulating pressure (which is represented as Px) of the energy accumulator 4, a 5 working pressure (which is represented as Pb) of the working pump 3 and a demand pressure (which is represented as Pn) of the actuation element 5, to make Px+Pb>2Pn. A specific working process is described as follows.
[0016] In a case of Px<2Pn, at the beginning moment, the pressure of the energy accumulator 4 is unable to drive the pressure actuation element 5, at this time the synchronous motor 1 0 cannot be rotated. Oil at the first inlet IN 1 and the second inlet IN2 of the synchronous motor cannot flow into the main outlet OUT of the synchronous motor. It can be known from a hydraulic transmission principle that the working pressure of the working pump 3 depends on a load. In this way, the working pressure of the working pump 3 continuously raises from a no-load pressure until the output pressure Pb>2Pn-Px. At this time, the synchronous motor 1 5 starts to rotate, outputs pressurized oil from both the first inlet IN 1 and the second inlet IN2 to the pressure actuation element 5, and the pressure actuation element lifts a working device. The synchronous motor 1 functions as a pressure distributor, which reduces the high pressure and increases the low pressure. The synchronous motor compensates a pressure Pn-Px, by which the working pump 3 is higher than a load, to the energy accumulator 4 to drive the load by the 0 working pump and the energy accumulator. A lift speed of the load depends on an output flow of the working pump 3. Since the synchronous motor 1 has no drain port, all working ports ve a high pressure and the volumetric efficiency of the synchronous motor 1 is close to 100%. Thus a total transmission efficiency is more than 90%, and an energy utilization rate is high. This method and parameters are the preferred embodiments for implement this disclosure.
[0017] In a case of Px>2Pn, the pressure of the energy accumulator 4 may drive the pressure actuation element 5. The synchronous motor 1 is rotated in a high speed under a function of the pressure oil from the first inlet INI, and the second inlet IN2 has a very low pressure, even a negative pressure. The load of the working pump 3 is zero in this case, and there is no power output by the working pump 3. If oil drainage of the energy accumulator 4 is performed with
- 5 12328667_1 (GHMatters) P110068.AU
English translation of PCT/CN2018/083257 throttle control, energy of the pressurized oil corresponding to a 2Pn-Px overpressure will be lost in a form of heat. If the oil drainage of the energy accumulator 4 is not performed with throttle control, the pressurized oil released by the energy accumulator 4 makes the lifting of the working device be continuously accelerated and results in an uncontrollable lifting speed, and 5 the synchronous motor 1 is possible to draw no oil and generate abnormal sound and damage components. In addition, in case of a certain recycled energy, a too high recycle pressure results in a too small volume of the recycled oil. In this case, each lift cycle of the working device cannot be completed during releasing of the recycled oil, pump oil supply is constantly switched, which results in a poor machine operability. Therefore, this situation should be 0 avoided.
[0018] The embodiments disclosed above are only preferred embodiments of the present disclosure, and the present disclosure is not limited thereto. For those skilled in the art, any modifications and changes may be made to the disclosure. Modifications, equivalent replacements and improvements made without departing from the spirit and principle of the 5 present disclosure should fall into the protection scope of the present disclosure.
In the claims which follow and in the preceding description of the disclosure, except where the context requires otherwise due to express language or necessary implication, the word “comprise” or variations such as “comprises” or “comprising” is used in an inclusive sense, i.e.
to specify the presence of the stated features but not to preclude the presence or addition of further features in various embodiments of the disclosure.

Claims (7)

1. A pressure self-matching energy utilization system, comprising: a synchronous motor, a control valve, a working pump, an energy accumulator and a pressure actuation element;
5 wherein a main outlet of the synchronous motor is connected to a load keeping cavity of the pressure actuation element, a first inlet of the synchronous motor is connected to an oil port of the energy accumulator via a first switch valve of the control valve, and a second inlet of the synchronous motor is connected to an output port of the working pump via a second switch 0 valve of the control valve.
2. The pressure self-matching energy utilization system according to claim 1, wherein, the synchronous motor has no low pressure drain port, an accumulating pressure of the energy accumulator is represented as Px, a working pressure of the working pump is represented as Pb, a demand pressure of the actuation element is represented as Pn, wherein, the pressure
5 self-matching energy utilization system works under a condition of Px+Pb>2Pn and Px<2Pn.
3. The pressure self-matching energy utilization system according to claim 2, wherein, the pressure actuation element comprises at least one oil cylinder and/or at least one hydraulic motor.
4. The pressure self-matching energy utilization system according to claim 3, wherein, the
20 load keeping cavity of the pressure actuation element is further connected to a descending control device, the descending control device is configured to control the pressure actuation element to control descending of a working device.
5. The pressure self-matching energy utilization system according to any one of claims 1 to 4, wherein, the oil port of the energy accumulator is further connected to an energy
25 accumulating control device, the energy accumulating control device is configured to charge energy to be recycled into the energy accumulator.
6. The pressure self-matching energy utilization system according to claim 5, wherein, the working pump is a fixed displacement pump or a variable displacement pump.
- 7 12328667_1 (GHMatters) P110068.AU
English translation of PCT/CN2018/083257
7. The pressure self-matching energy utilization system according to claim 6, wherein, a switch valve control signal of the control valve is a hydraulic signal and/or an electrical signal.
AU2018268620A 2017-05-16 2018-04-17 Automatic-pressure-matching energy utilization system Active AU2018268620B2 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CN201710343343.1 2017-05-16
CN201710343343.1A CN107013535B (en) 2017-05-16 2017-05-16 A kind of pressure Self Matching energy utility system
PCT/CN2018/083257 WO2018210084A1 (en) 2017-05-16 2018-04-17 Automatic-pressure-matching energy utilization system

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AU2018268620A1 AU2018268620A1 (en) 2018-12-20
AU2018268620B2 true AU2018268620B2 (en) 2020-06-11

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CN (1) CN107013535B (en)
AU (1) AU2018268620B2 (en)
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WO (1) WO2018210084A1 (en)

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