CN113027722A - Multi-mode hydraulic energy and electric energy bidirectional energy conversion device and method - Google Patents
Multi-mode hydraulic energy and electric energy bidirectional energy conversion device and method Download PDFInfo
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- CN113027722A CN113027722A CN202110478639.0A CN202110478639A CN113027722A CN 113027722 A CN113027722 A CN 113027722A CN 202110478639 A CN202110478639 A CN 202110478639A CN 113027722 A CN113027722 A CN 113027722A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B17/00—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
- F04B17/03—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03C—POSITIVE-DISPLACEMENT ENGINES DRIVEN BY LIQUIDS
- F03C99/00—Subject matter not provided for in other groups of this subclass
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/06—Control using electricity
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/10—Valves; Arrangement of valves
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- General Engineering & Computer Science (AREA)
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- Combustion & Propulsion (AREA)
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Abstract
The invention provides a multi-mode hydraulic energy and electric energy bidirectional energy conversion device and method, which utilize the composite energy storage of a capacitor and an energy accumulator to realize pulse high-power driving, reduce the installed power of a hydraulic main pump and reduce the load and load fluctuation of an engine. The conversion device comprises a controller, an electric system and a hydraulic system; an electrical system includes: the electric machine comprises a motor and a capacitor, wherein the capacitor is used for storing or releasing electric energy; the hydraulic system includes: a first hydraulic pump motor; a first oil port and a second oil port of the first hydraulic motor are respectively and correspondingly connected to a high-pressure loop and a low-pressure loop of the main hydraulic loop; the energy accumulator is used for accumulating or releasing hydraulic energy and is connected with the first oil port of the first hydraulic pump motor and the high-pressure loop; the first hydraulic pump motor and the energy accumulator are connected with the hydraulic instantaneous load through the electro-hydraulic servo valve; the controller is used for controlling the motor, the first hydraulic pump motor and the electro-hydraulic servo valve to work and controlling the on-off of the main hydraulic loop; the motor is in transmission connection with the first hydraulic pump motor.
Description
Technical Field
The invention relates to an electric hydraulic energy conversion technology, in particular to a multi-mode hydraulic energy and electric energy bidirectional energy conversion device
Background
At present, a flight control actuator system, a landing gear retraction and extension system and an embedded weapon cabin door opening and closing system (only aiming at military aircraft) of a hydraulic actuating system of an aviation aircraft are a plurality of main pulse loads. B787 in civil aircraft has the power requirement of about 120kW for a flight control actuator system, the power requirement of a landing gear retraction system is 100kW, the peak value of the power requirement of a flight control actuator system of the American advanced warplane F-22 in military aircraft during high maneuvering is about 260kW, and the instantaneous opening and closing power requirement of an embedded weapon cabin door is about 280kW (two doors). The landing gear retraction and release and weapon cabin door system belongs to instantaneous heavy load in flight task, the landing gear can be retracted and released only in the process of taking off and landing of the airplane, and the weapon cabin door of the military airplane is opened and closed only in a very short time for putting in the weapon in battle. At present, most aircrafts are driven by a centralized hydraulic system, the design power of the hydraulic system is usually designed according to the maximum peak value superposed power, so that the installed power of the hydraulic system is designed to be large, the used power only accounts for less than 25% of the installed power in 90% of time, and the aircrafts have the defects of large weight, low efficiency, large extracted power of an engine, large fluctuation and the like. China is developing new wide-body passenger planes and new generation fighters, and the problems are faced in the design of hydraulic systems of the planes.
Disclosure of Invention
The invention provides a multi-mode hydraulic energy and electric energy bidirectional energy conversion device and method, which utilize the composite energy storage of a capacitor and an energy accumulator to realize pulse high-power driving, reduce the installed power of a hydraulic main pump and reduce the load and load fluctuation of an engine. The invention has the advantages of light weight, low power, high operation efficiency and the like.
The technical scheme of the invention is realized as follows:
a multi-mode hydraulic energy and electric energy bidirectional energy conversion device comprises a controller, an electric system and a hydraulic system;
the electrical system includes:
an electric machine having two operating modes, a motor mode and a generator mode;
the capacitor is used for storing or releasing electric energy and is connected with the motor;
the hydraulic system includes:
a first hydraulic pump motor having two operating modes, a pump mode and a motor mode; a first oil port and a second oil port of the first hydraulic motor are respectively and correspondingly connected to a high-pressure loop and a low-pressure loop of the main hydraulic loop;
the energy accumulator is used for accumulating or releasing hydraulic energy and is connected with the first oil port of the first hydraulic pump motor and the high-pressure loop;
the first hydraulic pump motor and the accumulator are connected with a hydraulic instantaneous load through an electro-hydraulic servo valve;
the controller is used for controlling the motor, the first hydraulic pump motor and the electro-hydraulic servo valve to work and controlling the on-off of the main hydraulic loop; the motor is in transmission connection with the first hydraulic pump motor.
Further, the capacitor is connected with the motor sequentially through the DC/DC conversion unit and the motor control unit; the DC/DC conversion unit is connected with the controller.
Further, the motor and the capacitor are respectively connected with an electric pulse load; the electric pulse load is connected with the motor through the motor control unit, and the electric pulse load is connected with the DC/DC conversion unit.
Further, the first hydraulic pump motor and the accumulator are connected with the high-pressure loop through a first hydraulic control element group and are simultaneously connected with one port of the electro-hydraulic servo valve;
and a second oil port of the first hydraulic pump motor is connected with the low-pressure loop through a second hydraulic control element group and is simultaneously connected with the other port of the electro-hydraulic servo valve.
Further, the first hydraulic control element group includes: the hydraulic control system comprises a first check valve and a switch valve which are connected in parallel, wherein the flow direction of the switch valve is the direction from a main hydraulic circuit to a first hydraulic pump motor.
Further, the second hydraulic control element group includes: and the flow direction of the second check valve is the direction from the main hydraulic circuit to the first hydraulic pump motor.
Further, the hydraulic transient load comprises a second hydraulic pump motor and a mechanical transient load, and the electro-hydraulic servo valve is connected with the mechanical transient load through the second hydraulic pump motor.
Further, the main hydraulic circuit is connected with a conventional load, and the controller is connected with the conventional load.
Further, the electric machine and the first hydraulic pump motor are coupled through a transmission.
A multi-mode hydraulic energy and electric energy bidirectional energy conversion method comprises a hydraulic energy and electric energy bidirectional energy conversion device, wherein the conversion device comprises a controller, an electrical system and a hydraulic system, the electrical system comprises an electric machine and a capacitor, and the hydraulic system comprises a first hydraulic pump motor and an accumulator; the method comprises the following steps:
the controller makes the switching device in any one of A, B, C, D operation modes according to the control instruction:
a: a hydraulic energy reverse pulse load driving mode;
b: a hydraulic energy forward pulse load capacity feedback mode;
c: an electrical pulse load drive mode;
d: an electro-hydraulic energy comprehensive management mode;
when the switching device is in mode a, the following steps are included:
a1, the controller controls the first hydraulic pump motor to work in a pump mode, and the motor is in a motor mode;
a2, the main hydraulic circuit supplies hydraulic fluid to the accumulator and the first hydraulic pump motor, and the capacitor supplies power to the electric motor, so that the electric motor drives the first hydraulic pump motor to form a local hydraulic source;
a3, when the pressure of the local hydraulic source exceeds the oil supply pressure of the main hydraulic circuit, closing the connecting channel of the accumulator, the first hydraulic pump motor and the main hydraulic circuit;
a4, when the accumulator reaches the set pressure, controlling the electro-hydraulic servo valve to switch to the left position, so that the accumulator and the first hydraulic pump motor simultaneously provide high-pressure fluid for the hydraulic instantaneous load, and realizing pulse instantaneous load driving;
when the switching device is in mode B, the method comprises the following steps:
b1, the controller controls the first hydraulic pump motor to work in a motor mode, and the motor is in a generator mode;
b2, closing the communication channel between the electro-hydraulic servo valve, the first hydraulic pump motor and the main hydraulic circuit;
b3, controlling a second hydraulic pump motor in the hydraulic instantaneous load to work in a pump mode, and controlling the electro-hydraulic servo valve to be switched to the right position, so that the second hydraulic pump motor provides high-pressure fluid for the first hydraulic pump motor, drives the first hydraulic pump motor to work, drives the motor to generate power, and charges the capacitor;
when the switching device is in mode C, the following steps are included:
c1, the controller controls the first hydraulic pump to work in a motor mode and the motor to work in a generator mode;
c2, the main hydraulic circuit is communicated with the energy accumulator and a first oil port of the first hydraulic pump motor; simultaneously, closing the electro-hydraulic servo valve;
c3, the main hydraulic loop provides fluid for the first hydraulic pump motor, drives the first hydraulic pump to work, drives the motor to generate electricity, and further drives the electric pulse load to work;
when the conversion device is in the mode D, the method comprises the following steps:
when the hydraulic energy of the first hydraulic pump motor is surplus, the controller controls the first hydraulic pump to work in a motor mode and the motor to work in a generator mode, the main hydraulic loop supplies fluid to the first hydraulic pump motor to drive the first hydraulic pump to work, and then the motor is driven to generate power to supply power to the capacitor and the main power supply;
when the hydraulic energy of the first hydraulic pump motor is insufficient, the controller controls the first hydraulic pump to work in a pump mode, the motor works in an electric motor mode, and the motor drives the first hydraulic pump to work.
Drawings
The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the disclosure and together with the description serve to explain the principles of the disclosure.
FIG. 1 is a schematic block diagram of a first embodiment of the present disclosure;
FIG. 2 is a schematic diagram of the second embodiment of the present disclosure in a hydraulic energy reverse pulse load driving mode;
fig. 3 is a schematic diagram illustrating the conversion device in the hydraulic energy forward pulse load capacity feedback mode according to the second embodiment of the disclosure;
fig. 4 is a schematic diagram of the switching device in an electrical pulse load driving mode according to the second embodiment of the disclosure;
FIG. 5 is a schematic diagram of the second embodiment of the present disclosure in an electro-hydraulic energy management mode;
Detailed Description
The present disclosure will be described in further detail with reference to the drawings and embodiments. It is to be understood that the specific embodiments described herein are for purposes of illustration only and are not to be construed as limitations of the present disclosure. It should be further noted that, for the convenience of description, only the portions relevant to the present disclosure are shown in the drawings.
It should be noted that the embodiments and features of the embodiments in the present disclosure may be combined with each other without conflict. The present disclosure will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
The first embodiment is as follows:
referring to fig. 1, a multi-mode hydraulic energy and electric energy bidirectional energy conversion device includes a control unit 30, an electric system 20 and a hydraulic system 10;
the electrical system 20 includes:
an electric machine 24, said electric machine 24 having two modes of operation, a motor mode and a generator mode;
a capacitor 23 for storing or releasing electric energy, connected to the motor;
the hydraulic system 10 includes:
a first hydraulic pump motor 11, the first hydraulic pump motor 11 having two operation modes of a pump mode and a motor mode; a first oil port and a second oil port of the first hydraulic motor 11 are respectively and correspondingly connected to a high-pressure loop and a low-pressure loop of the main hydraulic loop;
an accumulator 13 for accumulating or releasing hydraulic energy, connected to the first port of the first hydraulic pump motor 11 and the high-pressure circuit;
the first hydraulic pump motor 11 and the accumulator 13 are connected to a hydraulic instantaneous load 18 via an electro-hydraulic servo valve 17;
the controller 30 is used for controlling the electric motor 24, the first hydraulic pump motor 11 and the electro-hydraulic servo valve 17 to work and controlling the on-off of a main hydraulic circuit; the electric machine 24 is in driving connection with the first hydraulic pump motor 11.
The technical scheme of this embodiment utilizes capacitor 23 to save the electric energy, utilize accumulator 13 to save hydraulic energy, realize compound energy storage, the electric energy driving motor 24 who utilizes capacitor 23 to save drives first hydraulic pump motor 11 and realizes local hydraulic pressure energy supply, the hydraulic energy of joint accumulator 13 saving drives hydraulic pressure instantaneous load 18 simultaneously, be in different mode through switching motor 24 and first hydraulic pump motor 11, and the local switch-on of hydraulic circuit, configuration such as shutoff, make conversion equipment can work in multiple different operating condition, through capacitor 23 and accumulator 13 compound energy storage, can be when satisfying pulse power drive demand, reduce hydraulic pressure main pump total installed power, reduce motor load and load fluctuation, improve system efficiency.
Through the switching of different operating modes of motor 24 and first hydraulic pump motor 11, realize the two-way conversion of electric energy/hydraulic energy, to the equipment that has electric energy and hydraulic energy simultaneously of aircraft class, can realize the complementation of two kinds of energies, further improve the efficiency of aircraft, reduce secondary energy system's overall weight, have light in weight, power is little, advantage that operating efficiency is high.
Specifically, the capacitor 23 of this embodiment is a super capacitor, and referring to fig. 1, the capacitor 23 is connected to the motor 24 through the DC/DC conversion unit 22 and the motor control unit 21 in sequence; the DC/DC conversion unit 22 is connected to the controller 30.
The motor 24 and the capacitor 23 are respectively connected with an electric pulse load 25; the electrical pulse load 25 is connected to the motor 24 through the motor control unit 21, and the electrical pulse load 25 is connected to the DC/DC conversion unit 25.
Referring to fig. 1, the first hydraulic pump motor 11 and the accumulator 13 are connected to the high pressure circuit through a first hydraulic control element group while being connected to one port of the electro-hydraulic servo valve 17;
the second port of the first hydraulic pump motor 11 is connected to the low-pressure circuit through a second hydraulic control element group, and is connected to the other port of the electro-hydraulic servo valve 17.
The first hydraulic control element group and the second hydraulic control element group are used for controlling connection and disconnection of a hydraulic circuit. The first hydraulic control element group includes: a first check valve 15b and a switch valve 12 connected in parallel, wherein the flow direction of the switch valve 12 is the direction from the main hydraulic circuit to the first hydraulic pump motor 11. The second hydraulic control element group includes: and the flow direction of the second check valve is the direction from the main hydraulic circuit to the first hydraulic pump motor 11.
In this embodiment, the hydraulic transient load includes a second hydraulic pump motor and a mechanical transient load, and the electro-hydraulic servo valve is connected to the mechanical transient load through the second hydraulic pump motor.
The main hydraulic circuit is connected to a conventional load 19 and the controller 30 is connected to the conventional load 19.
The electric machine 24 is coupled to the first hydraulic pump motor 11 via a transmission. The transmission device comprises a bearing and other transmission components.
Example two:
based on the first embodiment, the present embodiment provides a multi-mode bidirectional hydraulic and electric energy conversion method, including a bidirectional hydraulic and electric energy conversion device, where the conversion device includes a controller 30, an electrical system 20, and a hydraulic system 10, where the electrical system 10 includes an electric machine 24 and a capacitor 23, and the hydraulic system includes a first hydraulic pump motor 11 and an accumulator 13; the method comprises the following steps:
the controller makes the switching device in any one of A, B, C, D operation modes according to the control instruction:
a: a hydraulic energy reverse pulse load driving mode;
b: a hydraulic energy forward pulse load capacity feedback mode;
c: an electrical pulse load drive mode;
d: an electro-hydraulic energy comprehensive management mode;
when the switching device is in mode a, the following steps are included:
a1, the controller controls the first hydraulic pump motor to work in a pump mode, and the motor is in a motor mode;
a2, the main hydraulic circuit supplies hydraulic fluid to the accumulator and the first hydraulic pump motor, and the capacitor supplies power to the electric motor, so that the electric motor drives the first hydraulic pump motor to form a local hydraulic source;
a3, when the pressure of the local hydraulic source exceeds the oil supply pressure of the main hydraulic circuit, closing the connecting channel of the accumulator, the first hydraulic pump motor and the main hydraulic circuit;
a4, when the accumulator reaches the set pressure, controlling the electro-hydraulic servo valve to switch to the left position, so that the accumulator and the first hydraulic pump motor simultaneously provide high-pressure fluid for the hydraulic instantaneous load, and realizing pulse instantaneous load driving;
in this mode, the switching device needs to overcome a huge pneumatic load and is in a reverse load working condition, so that the hydraulic system needs to run with high power in a short time, at this time, referring to fig. 2, the control switch valve 12 is closed, the proportional switch valve 14 is opened, so as to realize that the main hydraulic circuit supplies hydraulic fluid to the accumulator and the first hydraulic pump motor, after receiving a start instruction, the DC/DC conversion unit 22, the motor control unit 21 and the first hydraulic pump motor 11 are cooperatively controlled, so that the switching device is in a working condition of capacitor discharge-motor (motor mode) -first hydraulic pump motor (pump mode), the main hydraulic circuit supplies oil to the accumulator 13, the controller controls the motor 24 to work in a large current overload mode, when the pressure of the local hydraulic source exceeds the main hydraulic circuit oil supply pressure, the first one-way valve 15b is closed, and after the accumulator 13 reaches a set pressure, the electro-hydraulic servo valve 17 is controlled to work at a left position, the second hydraulic pump motor in the hydraulic instantaneous load works in a motor mode, the energy accumulator 13 and the first hydraulic pump motor 11 jointly provide high-pressure fluid for the mechanical instantaneous load 18, the second hydraulic pump motor in the hydraulic instantaneous load 18 is rapidly started to drive to move, and the hydraulic system realizes pulse instantaneous load driving by utilizing instantaneous power release of the energy accumulator 13 and the capacitor 23.
In this mode, the transient load may be aircraft landing gear retraction or aircraft door opening.
When the switching device is in mode B, the method comprises the following steps:
b1, the controller controls the first hydraulic pump motor to work in a motor mode, and the motor is in a generator mode;
b2, closing the communication channel between the electro-hydraulic servo valve, the first hydraulic pump motor and the main hydraulic circuit;
b3, controlling a second hydraulic pump motor in the hydraulic instantaneous load to work in a pump mode, and controlling the electro-hydraulic servo valve to be switched to the right position, so that the second hydraulic pump motor provides high-pressure fluid for the first hydraulic pump motor, drives the first hydraulic pump motor to work, drives the motor to generate power, and charges the capacitor;
referring to FIG. 3, in this mode, the hydraulic subsystem is in a forward load condition. The controller controls the switch valve 12 to be closed, and the device is in the charging condition of the first hydraulic pump motor (motor mode) -the electric machine (generator mode) -the capacitor by cooperatively controlling the proportional switch valve 14, the inclination angle of the swash plate of the first hydraulic pump motor 11, the DC/DC conversion unit 22 and the electric machine control unit 21. In this mode, the electro-hydraulic servo valve 17 is operated in the right position, the proportional switching valve 14 is closed, and the second hydraulic pump motor in the hydraulic instantaneous load 18 is operated in the pump mode and supplies the high-pressure fluid to the first hydraulic pump motor 11, and the high-pressure fluid is converted into electric energy by the first hydraulic pump motor 11 and the electric motor 24, and stored in the super capacitor, thereby realizing energy feedback.
In this mode, the transient load may be the landing gear of the aircraft down, with the doors closed.
When the switching device is in mode C, the following steps are included:
c1, the controller controls the first hydraulic pump to work in a motor mode and the motor to work in a generator mode;
c2, the main hydraulic circuit is communicated with the energy accumulator and a first oil port of the first hydraulic pump motor; simultaneously, closing the electro-hydraulic servo valve;
c3, the main hydraulic loop provides fluid for the first hydraulic pump motor, drives the first hydraulic pump to work, drives the motor to generate electricity, and further drives the electric pulse load to work;
referring to fig. 4, in this mode, the controller controls the on-off valve 12 to open, opens the first check valve 15a, and the switching device works in the first hydraulic pump-motor (motor mode) -electric machine (generator mode) working condition, so as to realize the conversion from the hydraulic energy to the electric energy. The electric energy converted by the converter and the electric energy of the aircraft generator are used for driving the electric pulse load.
In this mode, the instantaneous load is an electrical pulse load such as a fighter plane radar and a laser weapon.
Referring to fig. 5, when the conversion apparatus is in the mode D, the following steps are included:
when the hydraulic energy of the first hydraulic pump motor is surplus, the controller controls the first hydraulic pump to work in a motor mode and the motor to work in a generator mode, the main hydraulic loop supplies fluid to the first hydraulic pump motor to drive the first hydraulic pump to work, and then the motor is driven to generate power to supply power to the capacitor and the main power supply; in the high efficiency mode at rated load, the motor (generator mode) is in the on-demand supplementary mode, which can improve overall efficiency.
When the hydraulic energy of the first hydraulic pump motor is insufficient, the controller controls the first hydraulic pump to work in a pump mode, the motor works in an electric motor mode, and the motor drives the first hydraulic pump to work.
In this mode, there is no instantaneous load. Based on the mode, the invention can further reduce the installed power of the main hydraulic system and the main power supply system, thereby reducing the weight of the whole system and effectively compensating the additional weight caused by the increase of the device.
The terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise. The orientations of the bottom bracket and the bottom bracket are relative or in the direction of the attached drawings.
In the description of the present invention, it should be noted that, unless otherwise explicitly stated or limited, the terms "connected" and "connected" are to be interpreted broadly, e.g., as being either fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
It will be understood by those skilled in the art that the foregoing embodiments are merely for clarity of description and are not intended to limit the scope of the invention. It will be apparent to those skilled in the art that other variations or modifications may be made on the above invention and still be within the scope of the invention.
Claims (10)
1. A multi-mode hydraulic energy and electric energy bidirectional energy conversion device is characterized by comprising a controller, an electric system and a hydraulic system;
the electrical system includes:
an electric machine having two operating modes, a motor mode and a generator mode;
the capacitor is used for storing or releasing electric energy and is connected with the motor;
the hydraulic system includes:
a first hydraulic pump motor having two operating modes, a pump mode and a motor mode; a first oil port and a second oil port of the first hydraulic motor are respectively and correspondingly connected to a high-pressure loop and a low-pressure loop of the main hydraulic loop;
the energy accumulator is used for accumulating or releasing hydraulic energy and is connected with the first oil port of the first hydraulic pump motor and the high-pressure loop;
the first hydraulic pump motor and the accumulator are connected with a hydraulic instantaneous load through an electro-hydraulic servo valve;
the controller is used for controlling the motor, the first hydraulic pump motor and the electro-hydraulic servo valve to work and controlling the on-off of the main hydraulic loop; the motor is in transmission connection with the first hydraulic pump motor.
2. A multi-mode bidirectional energy conversion device of hydraulic energy and electric energy as recited in claim 1, wherein said capacitor is connected to said motor sequentially through a DC/DC conversion unit and a motor control unit; the DC/DC conversion unit is connected with the controller.
3. A multi-mode bidirectional hydraulic and electric energy conversion device as recited in claim 2, wherein said motor and said capacitor are connected to an electrical pulse load, respectively; the electric pulse load is connected with the motor through the motor control unit, and the electric pulse load is connected with the DC/DC conversion unit.
4. A multi-mode hydraulic and electric bidirectional energy conversion apparatus as recited in claim 1, wherein said first hydraulic pump motor and said accumulator are connected to said high-pressure circuit through a first hydraulic control element group while being connected to a port of said electrohydraulic servo valve;
and a second oil port of the first hydraulic pump motor is connected with the low-pressure loop through a second hydraulic control element group and is simultaneously connected with the other port of the electro-hydraulic servo valve.
5. A multi-mode bidirectional hydraulic and electrical energy conversion apparatus as recited in claim 4, wherein said first hydraulic control element group comprises: the hydraulic control system comprises a first check valve and a switch valve which are connected in parallel, wherein the flow direction of the switch valve is the direction from a main hydraulic circuit to a first hydraulic pump motor.
6. A multi-mode hydraulic and electric bidirectional energy conversion apparatus as recited in claim 4, wherein said second hydraulic control element group includes: and the flow direction of the second check valve is the direction from the main hydraulic circuit to the first hydraulic pump motor.
7. A multi-mode bi-directional energy conversion device of hydraulic and electric energy as claimed in claim 1, wherein said hydraulic transient load comprises a second hydraulic pump motor and a mechanical transient load, said electro-hydraulic servo valve being connected to said mechanical transient load via said second hydraulic pump motor.
8. A multi-mode bi-directional energy conversion device according to any one of claims 1-7, wherein said main hydraulic circuit is connected to a conventional load and said controller is connected to the conventional load.
9. A multi-mode bi-directional energy conversion device as claimed in any one of claims 1 to 7, wherein said electric machine is coupled to said first hydraulic pump motor via a transmission.
10. A multi-mode hydraulic energy and electric energy bidirectional energy conversion method is characterized by comprising a hydraulic energy and electric energy bidirectional energy conversion device, wherein the conversion device comprises a controller, an electrical system and a hydraulic system, the electrical system comprises an electric machine and a capacitor, and the hydraulic system comprises a first hydraulic pump motor and an accumulator; the method comprises the following steps:
the controller makes the switching device in any one of A, B, C, D operation modes according to the control instruction:
a: a hydraulic energy reverse pulse load driving mode;
b: a hydraulic energy forward pulse load capacity feedback mode;
c: an electrical pulse load drive mode;
d: an electro-hydraulic energy comprehensive management mode;
when the switching device is in mode a, the following steps are included:
a1, the controller controls the first hydraulic pump motor to work in a pump mode, and the motor is in a motor mode;
a2, the main hydraulic circuit supplies hydraulic fluid to the accumulator and the first hydraulic pump motor, and the capacitor supplies power to the electric motor, so that the electric motor drives the first hydraulic pump motor to form a local hydraulic source;
a3, when the pressure of the local hydraulic source exceeds the oil supply pressure of the main hydraulic circuit, closing the connecting channel of the accumulator, the first hydraulic pump motor and the main hydraulic circuit;
a4, when the accumulator reaches the set pressure, controlling the electro-hydraulic servo valve to switch to the left position, so that the accumulator and the first hydraulic pump motor simultaneously provide high-pressure fluid for the hydraulic instantaneous load, and realizing pulse instantaneous load driving;
when the switching device is in mode B, the method comprises the following steps:
b1, the controller controls the first hydraulic pump motor to work in a motor mode, and the motor is in a generator mode;
b2, closing the communication channel between the electro-hydraulic servo valve, the first hydraulic pump motor and the main hydraulic circuit;
b3, controlling a second hydraulic pump motor in the hydraulic instantaneous load to work in a pump mode, and controlling the electro-hydraulic servo valve to be switched to the right position, so that the second hydraulic pump motor provides high-pressure fluid for the first hydraulic pump motor, drives the first hydraulic pump motor to work, drives the motor to generate power, and charges the capacitor;
when the switching device is in mode C, the following steps are included:
c1, the controller controls the first hydraulic pump to work in a motor mode and the motor to work in a generator mode;
c2, the main hydraulic circuit is communicated with the energy accumulator and a first oil port of the first hydraulic pump motor; simultaneously, closing the electro-hydraulic servo valve;
c3, the main hydraulic loop provides fluid for the first hydraulic pump motor, drives the first hydraulic pump to work, drives the motor to generate electricity, and further drives the electric pulse load to work;
when the conversion device is in the mode D, the method comprises the following steps:
when the hydraulic energy of the first hydraulic pump motor is surplus, the controller controls the first hydraulic pump to work in a motor mode and the motor to work in a generator mode, the main hydraulic loop supplies fluid to the first hydraulic pump motor to drive the first hydraulic pump to work, and then the motor is driven to generate power to supply power to the capacitor and the main power supply;
when the hydraulic energy of the first hydraulic pump motor is insufficient, the controller controls the first hydraulic pump to work in a pump mode, the motor works in an electric motor mode, and the motor drives the first hydraulic pump to work.
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| CN114278627A (en) * | 2021-12-23 | 2022-04-05 | 中国航空工业集团公司金城南京机电液压工程研究中心 | Airborne pressurization energy storage hydraulic system and method capable of converting electric energy and hydraulic energy |
| CN114321042A (en) * | 2021-12-23 | 2022-04-12 | 中国航空工业集团公司金城南京机电液压工程研究中心 | Electric backup airborne pressurization energy storage flow compensation hydraulic system and method |
| CN114321041A (en) * | 2021-12-23 | 2022-04-12 | 中国航空工业集团公司金城南京机电液压工程研究中心 | Airborne energy storage hydraulic system and method for electric energy hydraulic bidirectional conversion |
| CN117780747A (en) * | 2024-02-27 | 2024-03-29 | 中国航空工业集团公司金城南京机电液压工程研究中心 | Electro-hydraulic conversion control method and system for aircraft |
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