CN114321041A - Airborne energy storage hydraulic system and method for electric energy hydraulic bidirectional conversion - Google Patents
Airborne energy storage hydraulic system and method for electric energy hydraulic bidirectional conversion Download PDFInfo
- Publication number
- CN114321041A CN114321041A CN202111592221.9A CN202111592221A CN114321041A CN 114321041 A CN114321041 A CN 114321041A CN 202111592221 A CN202111592221 A CN 202111592221A CN 114321041 A CN114321041 A CN 114321041A
- Authority
- CN
- China
- Prior art keywords
- motor
- energy storage
- hydraulic system
- energy
- oil
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Landscapes
- Fluid-Pressure Circuits (AREA)
Abstract
The application belongs to the field of airplane hydraulic systems, and discloses an onboard energy storage hydraulic system and method for electric energy hydraulic bidirectional conversion, wherein the system comprises an energy accumulator, an electromagnetic directional valve, an energy storage control valve, a pump-motor, a speed change device and a motor generator; the oil supply end of the airborne hydraulic system is communicated with an energy accumulator, the energy accumulator is connected with a pump-motor through an energy storage control valve to serve as an oil outlet of the pump, and the energy accumulator is connected with the P end of an electromagnetic directional valve; the oil return end of the airborne hydraulic system is connected with a pump-motor as an oil inlet of the pump; the pump-motor is connected with the onboard actuator and the motor-generator through the speed changing device respectively. The invention adopts electric pressurization energy storage on the basis of the pressure grade of the on-board hydraulic system, the energy storage efficiency is higher than that of a motor pressurization energy storage method, the actuation time of an instantaneous high-power on-board hydraulic user is shortened, the installation power of the on-board hydraulic system of the airplane is reduced, the weight of the system is not required to be increased, and the invention has better economy and also has the function of electric energy-hydraulic energy interconversion.
Description
Technical Field
The application belongs to the field of airplane hydraulic systems, relates to a hydraulic system with an energy storage function and electric energy and hydraulic energy bidirectional conversion, and particularly relates to an airborne energy storage hydraulic system and method with electric energy and hydraulic energy bidirectional conversion.
Background
The multi-electrification is the development direction of modern airplanes, along with the continuous development and maturity of power telex technology, unmanned aerial vehicles have widely applied to high-power electric equipment such as EMA, and large-scale airplanes are selecting and are selecting for use when actuating the system, are gradually adopting the form that power telex actuator and hydraulic servo actuator mix and actuate to promote economic nature, security, environmental protection nature and the travelling comfort of aircraft.
In the full flight profile of the airplane, hydraulic users such as an airplane landing gear, a front wheel turning part, a brake part and a cabin door only participate in working in the corresponding flight profile, the hydraulic energy system is required to provide flow meeting the corresponding task requirements in the process, and in the rest flight profile of the airplane, the hydraulic energy system is only required to supply flow meeting the requirements of conventional hydraulic users, so that the contradiction between instantaneous power requirements and installed power is well solved by adopting a hydraulic system energy configuration scheme of 'a main hydraulic system + a pressurization energy storage system', and the system weight is prevented from being greatly improved. On the other hand, when the hydraulic users only working in a few flight times do not work and the system hydraulic flow supply capacity exceeds the demand of the current onboard hydraulic users, if the redundant hydraulic energy can be converted into electric energy for other electric users of the airplane to use, the energy utilization efficiency of the airplane can be improved to the maximum extent.
In the flight profile of the airplane, although the working time of hydraulic users such as an undercarriage, a front wheel turning and a brake is short, the hydraulic users are related to the flight safety of the airplane, and when a main hydraulic system breaks down, the hydraulic energy which is temporarily supplied is provided by the backup hydraulic energy to ensure that the airplane can safely land.
In conclusion, a multifunctional hydraulic system with functions of pressurization energy storage, electric energy-hydraulic energy conversion and emergency hydraulic energy is needed to meet the working requirements of the aircraft hydraulic system. Patents [ application No.: 201710554447.7 and patents [ application number: 201710554477.8, a hydraulic and electric pressurizing energy-storing cabin door actuating system is provided, but the system does not have the functions of electric energy-hydraulic energy interconversion and emergency energy. Patents [ application No.: CN202110478639.0 discloses a device and method for converting hydraulic energy and electric energy in two ways in multiple modes, but the method does not have load adaptive capability, when the main hydraulic system of the system works, the hydraulic pump motor unit must work in energy storage or power generation mode, which results in some energy waste.
Disclosure of Invention
The invention aims to provide an onboard energy storage hydraulic system and method for electric energy hydraulic bidirectional conversion, so that the pressurization energy storage and the electric energy hydraulic energy conversion of an airplane hydraulic system are realized.
The invention is realized by the following technical scheme:
an onboard energy storage hydraulic system for electric energy hydraulic bidirectional conversion comprises an energy accumulator, an electromagnetic directional valve, an energy storage control valve, a one-way variable pump-bidirectional motor, a speed change device and a motor-generator; the oil supply end of the airborne hydraulic system is communicated with an energy accumulator through an oil supply one-way valve, the energy accumulator is connected with a one-way variable pump-two-way motor through an energy storage control valve and serves as an oil outlet of the pump, and the energy accumulator is connected with the P end of an electromagnetic reversing valve; an oil return end of the airborne hydraulic system is connected with a one-way variable pump and a two-way motor to serve as an oil inlet of the pump; the unidirectional variable pump-bidirectional motor is respectively connected with the airborne actuator and the motor-generator through a speed change device.
Furthermore, the energy accumulator is also connected with the unidirectional variable pump-bidirectional motor through an electromagnetic directional valve, and the end A and the end B of the electromagnetic directional valve are respectively connected with the unidirectional variable pump-bidirectional motor as two ends of the motor.
The energy accumulator is connected with the electromagnetic directional valve through the unloading control valve, when the electromagnetic directional valve is in a neutral position, the P end and the T end of the electromagnetic directional valve are communicated, and the A end and the B end of the electromagnetic directional valve are closed; and the oil return end of the airborne hydraulic system is connected with the T end of the electromagnetic directional valve.
The hydraulic control system further comprises a shuttle valve and a load sensing mechanism, wherein the end A of the electromagnetic reversing valve is connected with one oil inlet of the shuttle valve, the end B of the electromagnetic reversing valve is connected with the other oil inlet of the shuttle valve, a working port of the shuttle valve is connected with the load sensing mechanism, and the load sensing mechanism converts oil pressure into stroke and transmits the stroke to the one-way variable pump-two-way motor to be used as displacement control input of the one-way variable pump-two-way motor.
Furthermore, the energy accumulator is connected with an oil return end of the onboard hydraulic system through the safety valve.
A method for an onboard energy storage hydraulic system with electric energy hydraulic bidirectional conversion comprises a conventional energy storage method, an emergency energy storage method, a mechanism execution method and a power generation method, wherein the conventional energy storage method is started when an energy accumulator is normally stored, the emergency energy storage method is started when the onboard hydraulic system fails, the mechanism execution method is started when a mechanism actuator works, and the power generation method is started when a motor-generator works as a power generator.
Further, the conventional energy storage method specifically comprises the following steps:
step one, closing an unloading control valve and an energy storage control valve, and supplying oil to an energy accumulator through an oil supply one-way valve by an oil supply end of an airborne hydraulic system until the oil pressure of the energy accumulator is equal to that of the oil supply end of the airborne hydraulic system;
and step two, stopping oil supply at the oil supply end of the airborne hydraulic system, keeping the electromagnetic directional valve at a middle position, opening the energy storage control valve, starting the motor-generator as a motor, driving the unidirectional variable pump-bidirectional motor to operate as a high-pressure pump through the speed change device, pumping the oil at the oil return end of the airborne hydraulic system to the energy accumulator through the energy storage control valve after the unidirectional variable pump-bidirectional motor serves as the high-pressure pump, and until the oil pressure of the energy accumulator meets the requirement.
Further, the emergency energy storage method specifically comprises the following steps: the electromagnetic directional valve keeps a middle position, the energy storage control valve is opened, the motor-generator is started as a motor, the speed change device drives the one-way variable pump-two-way motor to operate as a high-pressure pump, the one-way variable pump-two-way motor serves as a high-pressure pump, oil at the oil return end of the airborne hydraulic system is pressurized and then pumped to the energy accumulator through the energy storage control valve until the oil pressure of the energy accumulator meets the requirement.
Further, the airborne execution method specifically comprises the following steps:
the energy storage control valve is closed, the unloading control valve is opened, the electromagnetic directional valve is switched to communicate the P end with the A end or the P end with the B end, the energy accumulator releases oil pressure to drive the unidirectional variable pump-bidirectional motor to operate as a motor, and the unidirectional variable pump-bidirectional motor drives the airborne actuator to rapidly make required actions through the speed change device.
Further, the power generation method specifically comprises the following steps:
the energy storage control valve is opened, the unloading control valve is closed, the electromagnetic directional valve keeps a middle position, and the oil supply end of the airborne hydraulic system drives the one-way variable pump-two-way motor to operate as a motor through the oil supply one-way valve and the energy storage control valve and then enters the oil return end of the airborne hydraulic system; the unidirectional variable pump-bidirectional motor drives the motor-generator to serve as a generator to generate electricity through the speed changing device, the energy accumulator helps to stabilize oil pressure, and the shuttle valve and the load sensing mechanism are matched to stabilize the rotating speed of the unidirectional variable pump-bidirectional motor, so that the unidirectional variable pump-bidirectional motor operates stably and is developed, and the motor-generator generates electricity stably.
Further, in the starting process of the method, the shuttle valve transmits the pressure of the end A and the end B of the electromagnetic directional valve through the two oil inlets, the pressure of the high-pressure side is transmitted to the load sensing mechanism, and the load sensing mechanism adjusts the displacement of the unidirectional variable pump-bidirectional motor according to the pressure, so that the displacement of the unidirectional variable pump-bidirectional motor is smaller when the pressure is larger.
Compared with the prior art, the invention has the following beneficial effects:
(1) the functions of pressurization energy storage, electric energy-hydraulic energy conversion and emergency hydraulic energy of the airplane hydraulic system are realized through one set of hydraulic system, and the airplane hydraulic system has multiple functions and strong practicability;
(2) the invention adopts electric pressurization energy storage on the basis of the pressure grade of the on-machine hydraulic system, and the energy storage efficiency is higher than that of a motor pressurization energy storage method;
(3) the invention shortens the actuation time of the instantaneous high-power onboard hydraulic user, reduces the installed power of the aircraft hydraulic system, does not need to increase the weight of the system, and has better economy;
(4) the energy-saving hydraulic generator has the function of mutual conversion of electric energy and hydraulic energy, realizes peak staggering complementation of the electric energy and the hydraulic energy, and reduces the displacement requirement of an engine pump and the capacity requirement of a generator;
(5) the hydraulic system is simple in principle, and can be used as an emergency hydraulic energy source under the condition that the complexity of the hydraulic system is not increased.
Drawings
FIG. 1 is a schematic diagram of an airborne load-sensitive supercharging energy-storage hydraulic system based on the principle of bidirectional conversion of electric energy and hydraulic energy;
the system comprises a fuel supply one-way valve, a fuel accumulator, a safety valve, an unloading control valve, an energy storage control valve, a solenoid directional valve, a fuel suction one-way valve, a shuttle valve, a load sensitive mechanism, a one-way variable pump, a two-way motor, a speed change device, a motor-generator and a controller, wherein the fuel supply one-way valve is 1, the energy accumulator is 2, the safety valve is 3, the unloading control valve is 4, the energy storage control valve is 5, the solenoid directional valve is 6, the fuel suction one-way valve is 7, the shuttle valve is 8, the load sensitive mechanism is 9, the one-way variable pump is 10, the two-way motor is 11, the speed change device is 12, the motor-generator and the controller is 13.
Detailed Description
This section is an example of the present invention and is provided to explain and illustrate the technical solutions of the present invention.
An onboard energy storage hydraulic system for electric energy hydraulic bidirectional conversion comprises an energy accumulator 2, an electromagnetic directional valve 6, an energy storage control valve 5, a unidirectional variable pump-bidirectional motor 10, a speed change device 11 and a motor-generator 12; the oil supply end of the airborne hydraulic system is communicated with an energy accumulator 2 through an oil supply one-way valve 1, the energy accumulator 2 is connected with a one-way variable pump-two-way motor 10 through an energy storage control valve 5 to serve as an oil outlet of the pump, and the energy accumulator 2 is connected with the P end of an electromagnetic directional valve 6; the oil return end of the airborne hydraulic system is connected with a one-way variable pump-two-way motor 10 as an oil inlet of the pump; the unidirectional variable pump-bidirectional motor 10 is connected to an onboard actuator and a motor-generator 12 through a transmission 11, respectively.
The energy accumulator 2 is also connected with a unidirectional variable pump-bidirectional motor 10 through an electromagnetic directional valve 6, and the A end and the B end of the electromagnetic directional valve 6 are respectively connected with the unidirectional variable pump-bidirectional motor 10 as two ends of the motor.
The energy accumulator 2 is connected with the electromagnetic directional valve 6 through the unloading control valve 4, when the electromagnetic directional valve 6 is in a neutral position, the P end and the T end of the electromagnetic directional valve 6 are communicated, and the A end and the B end of the electromagnetic directional valve 6 are closed; and the oil return end of the airborne hydraulic system is connected with the T end of the electromagnetic directional valve 6.
The oil pressure is converted into a stroke by the load sensitive mechanism 9, and then the stroke is transmitted to the one-way variable pump-two-way motor 10 to be used as displacement control input.
The energy accumulator 2 is connected with an oil return end of the airborne hydraulic system through the safety valve 3.
A method for an onboard energy storage hydraulic system with electric energy hydraulic bidirectional conversion comprises a conventional energy storage method, an emergency energy storage method, a mechanism execution method and a power generation method, wherein the conventional energy storage method is started when an energy accumulator is normally stored, the emergency energy storage method is started when the onboard hydraulic system fails, the mechanism execution method is started when a mechanism actuator works, and the power generation method is started when a motor-generator 12 works as a power generator.
The conventional energy storage method specifically comprises the following steps:
step one, an unloading control valve 4 and an energy storage control valve 5 are closed, and an oil supply end of the airborne hydraulic system supplies oil to an energy accumulator 2 through an oil supply one-way valve 1 until the oil pressure of the energy accumulator 2 is equal to that of the oil supply end of the airborne hydraulic system;
and step two, stopping oil supply at the oil supply end of the airborne hydraulic system, keeping the electromagnetic directional valve 6 at a neutral position, opening the energy storage control valve 5, starting the motor-generator 12 as a motor, driving the unidirectional variable pump-bidirectional motor 10 to operate as a high-pressure pump through the speed change device 11, using the unidirectional variable pump-bidirectional motor 10 as a high-pressure pump, pressurizing oil at the oil return end of the airborne hydraulic system, and pumping the oil to the energy accumulator 2 through the energy storage control valve 5 until the oil pressure of the energy accumulator 2 meets the requirement.
The emergency energy storage method specifically comprises the following steps: the electromagnetic directional valve 6 keeps a middle position, the energy storage control valve 5 is opened, the motor-generator 12 is started as a motor, the speed change device 11 drives the one-way variable pump-two-way motor 10 to operate as a high-pressure pump, the one-way variable pump-two-way motor 10 serves as a high-pressure pump, oil at an oil return end of the airborne hydraulic system is pressurized and then pumped to the energy accumulator 2 through the energy storage control valve 5 until the oil pressure of the energy accumulator 2 meets the requirement.
The airborne execution method specifically comprises the following steps:
the energy storage control valve 5 is closed, the unloading control valve 4 is opened, the electromagnetic reversing valve 6 is switched to communicate the P end with the A end or the P end with the B end, the energy accumulator 2 releases oil pressure to drive the one-way variable pump-two-way motor 10 to operate as a motor, and the one-way variable pump-two-way motor 10 drives the airborne actuator to rapidly make required actions through the speed changing device 11.
The power generation method specifically comprises the following steps:
the energy storage control valve 5 is opened, the unloading control valve 4 is closed, the electromagnetic directional valve 6 keeps a middle position, and the oil supply end of the airborne hydraulic system drives the one-way variable pump-two-way motor 10 to operate as a motor through the oil supply one-way valve 1 and the energy storage control valve 5 and then enters the oil return end of the airborne hydraulic system; the unidirectional variable pump-bidirectional motor 10 drives the motor-generator 12 to serve as a generator to generate electricity through the speed changing device 11, the energy accumulator 2 helps to stabilize oil pressure, and the shuttle valve 8 and the load sensing mechanism 9 are matched to stabilize the rotating speed of the unidirectional variable pump-bidirectional motor 10, so that the unidirectional variable pump-bidirectional motor 10 operates stably in a developed mode, and the motor-generator 12 generates electricity stably.
In the starting process of the method, the shuttle valve 8 transmits the pressure of the A end and the B end of the electromagnetic directional valve 6 through the two oil inlets, the pressure on the high-pressure side is transmitted to the load sensitive mechanism 9, and the load sensitive mechanism 9 adjusts the displacement of the unidirectional variable pump-bidirectional motor 10 according to the pressure, so that the displacement of the unidirectional variable pump-bidirectional motor 10 is smaller when the pressure is larger.
Embodiments of the present invention are described below with reference to the drawings.
An oil supply one-way valve 1 is arranged between the oil supply loop of the airborne hydraulic system and the energy accumulator 2, and the oil supply one-way valve 1 allows the airborne hydraulic system oil supply loop to supply hydraulic oil to the energy storage hydraulic system in a one-way mode.
An oil suction one-way valve 7 is arranged between an oil return loop of the airborne hydraulic system and the one-way variable pump-two-way motor 10, so that the one-way variable pump-two-way motor 10 can be ensured to suck hydraulic oil from the oil return loop of the airborne hydraulic system in one way; an energy storage control valve 5 is arranged between the unidirectional variable pump-bidirectional motor 10 and the energy accumulator 2, and the energy storage control valve 5 is used for controlling the on-off of an oil path between the unidirectional variable pump-bidirectional motor 10 and the energy accumulator 2.
The P port of the electromagnetic directional valve 6 is connected with the energy accumulator 2, the T port is connected with an oil return loop of the airborne hydraulic system, the A port and the B port are respectively connected with two working oil ports of the unidirectional variable pump-bidirectional motor 10, and when the unidirectional variable pump-bidirectional motor 10 is used as a motor, the electromagnetic directional valve 6 controls the steering of the unidirectional variable pump-bidirectional motor 10, so that the airborne actuator is driven to act as required.
A shuttle valve 8 is arranged between two working oil ports of the unidirectional variable pump-bidirectional motor 10, the load pressure is fed back to a load sensitive mechanism 9, and the displacement of the unidirectional variable pump-bidirectional motor 10 is adjusted.
An unloading control valve 4 is arranged between a P port of the electromagnetic directional valve 6 and an oil supply loop of the airborne hydraulic system, the unloading control valve 4 is used for controlling the on-off of an oil path between high-pressure oil in the energy accumulator 2 and the P port of the electromagnetic directional valve 6, and when the system stops working or is overhauled, the pressure oil in the energy accumulator 2 can be released by means of the function of communicating the P port with the T port in the position in the electromagnetic directional valve 6.
And a safety valve 3 is arranged between the energy accumulator 2 and the oil return loop of the airborne hydraulic system and is used for setting the highest working pressure of the energy storage hydraulic system.
The controller 13 of the present invention controls the motor-generator 12 to operate in the motoring mode or the generating mode according to the system task instruction.
The motor-generator 12 and the onboard actuator are respectively in mechanical connection with the unidirectional variable pump-bidirectional motor 10 through the speed changing device 11, when the unidirectional variable pump-bidirectional motor 10 works as a pump to perform pressurization and energy storage, the controller 13 controls the motor-generator 12 to be used as an electric motor, the speed changing device 11 is adjusted to a gear corresponding to the work of the motor-generator 12, the motor-generator 12 drives a pump unit of the unidirectional variable pump-bidirectional motor 10 to work, and the onboard actuator does not work; when the unidirectional variable pump-bidirectional motor 10 works as a motor to generate electricity, the controller 13 controls the motor-generator 12 to be used as a generator, the speed changing device 11 is adjusted to a gear corresponding to the work of the motor-generator 12, a motor unit of the unidirectional variable pump-bidirectional motor 10 drives the generator of the motor-generator 12 to work, and an onboard actuator does not work; when the unidirectional variable pump-bidirectional motor 10 is used as a motor to work and drive the onboard actuator, the controller 13 and the motor-generator 12 do not work, the speed changing device 11 is adjusted to a gear corresponding to the work of the onboard actuator, and a motor unit of the unidirectional variable pump-bidirectional motor 10 drives the onboard actuator to work.
The hydraulic system of the invention has three working modes:
the first mode is as follows: and (4) an energy storage mode.
When used in the energy storage mode, three situations are distinguished. Conventional energy storage: under the condition that the motor-generator does not work, the unloading control valve and the energy storage control valve are both adjusted to the cut-off position, firstly, the onboard hydraulic system charges liquid to an energy accumulator in the energy storage pressure system until the pressure of the energy accumulator reaches the working pressure of the onboard hydraulic system, then the energy storage control valve is adjusted to the communication position, the speed change device is adjusted to a gear corresponding to the working of the motor-generator, the controller controls the motor-generator to be in a motor mode, a variable pump of the one-way variable pump-two-way motor is driven to work, hydraulic oil is sucked from an oil return loop of the onboard hydraulic system through the oil suction one-way valve, high-pressure oil is pumped into the energy accumulator in the energy storage hydraulic system, when the pressure of the energy accumulator reaches the energy storage pressure set by the system, the motor-generator is closed, the energy storage control valve is both adjusted to the cut-off position, and the energy storage process is finished. And the main hydraulic system is in fault energy storage: the unloading control valve is adjusted to a stop position, the energy storage control valve is adjusted to a communication position, the speed change device is adjusted to a gear corresponding to the work of the motor-generator, the controller controls the motor-generator to be in a motor mode, a variable pump of the unidirectional variable pump-bidirectional motor is driven to work, hydraulic oil is sucked from an oil return loop of the hydraulic system of the motor-carrier through the oil suction one-way valve, high-pressure oil is pumped into an energy accumulator in the energy storage hydraulic system, when the pressure of the energy accumulator reaches the energy storage pressure set by the system, the motor-generator is closed, the energy storage control valves are all adjusted to the stop position, and the energy storage process is finished. Thirdly, fault energy storage of the motor-generator: the unloading control valve and the energy storage control valve are both adjusted to the stop positions, an energy accumulator in the energy storage hydraulic system is filled with liquid directly through the onboard hydraulic system and the oil supply one-way valve, energy storage of the energy accumulator is achieved, although the boosting function cannot be achieved in the situation, hydraulic energy can be supplied to onboard actuators such as an undercarriage and a brake which need emergency energy, and flight safety of the airplane is guaranteed.
And a second mode: and (4) a power generation mode.
The unloading control valve is adjusted to a stop position, the energy storage control valve is adjusted to a communication position, the speed change device is adjusted to a gear corresponding to the work of the motor-generator, the controller controls the motor-generator to be in a generator mode, pressure oil of an airborne hydraulic system drives a bidirectional motor of a unidirectional variable pump-bidirectional motor to work through an oil supply one-way valve and the energy storage control valve, the generator of the motor-generator is driven to work by means of the speed change device, and alternating current generated by the generator is modulated and stabilized by the controller and then is transmitted to an airplane power grid for use.
And a third mode: and driving the airborne actuator to release the working mode.
The energy storage control valve is adjusted to a communicating position, the speed change device is adjusted to a gear corresponding to the work of the airborne actuator, the electromagnetic directional valve is controlled to act, the unloading control valve is adjusted to the communicating position, and the airborne actuator is driven to act by a bidirectional motor unit of the unidirectional variable pump-bidirectional motor.
In conclusion, the energy storage hydraulic system is simple in composition, can realize the function of converting electric energy and hydraulic energy, has the functions of boosting energy storage and emergency hydraulic energy, enriches the functions of an airborne hydraulic system, and has great practical significance.
Claims (10)
1. An onboard energy storage hydraulic system for electric energy hydraulic bidirectional conversion is characterized by comprising an energy accumulator (2), an electromagnetic directional valve (6), an energy storage control valve (5), a one-way variable pump-bidirectional motor (10), a speed change device (11) and a motor-generator (12); the oil supply end of the airborne hydraulic system is communicated with an energy accumulator (2) through an oil supply one-way valve (1), the energy accumulator (2) is connected with a one-way variable pump-two-way motor (10) through an energy storage control valve (5) to serve as an oil outlet of a pump, and the energy accumulator (2) is connected with the P end of an electromagnetic directional valve (6); the oil return end of the airborne hydraulic system is connected with a one-way variable pump-two-way motor (10) as an oil inlet of the pump; the one-way variable pump-two-way motor (10) is respectively connected with the onboard actuator and the motor-generator (12) through a speed changing device (11).
2. The onboard energy storage hydraulic system for the electric energy hydraulic bidirectional conversion is characterized in that the energy accumulator (2) is further connected with a unidirectional variable pump-bidirectional motor (10) through an electromagnetic directional valve (6), and the A end and the B end of the electromagnetic directional valve (6) are respectively connected with the unidirectional variable pump-bidirectional motor (10) to serve as two ends of the motor.
3. The airborne energy storage hydraulic system with electric energy hydraulic bidirectional conversion according to claim 2, characterized by further comprising an unloading control valve (4), wherein the energy accumulator (2) is connected with the electromagnetic directional valve (6) through the unloading control valve (4), when the electromagnetic directional valve (6) is in a neutral position, the P end and the T end of the electromagnetic directional valve (6) are communicated, and the A end and the B end of the electromagnetic directional valve (6) are closed; the oil return end of the airborne hydraulic system is connected with the T end of the electromagnetic directional valve (6).
4. The airborne energy storage hydraulic system with electric energy hydraulic bidirectional conversion is characterized by further comprising a shuttle valve (8) and a load sensing mechanism (9), wherein the end A of the electromagnetic directional valve (6) is connected with one oil inlet of the shuttle valve (8), the end B of the electromagnetic directional valve (6) is connected with the other oil inlet of the shuttle valve (8), a working port of the shuttle valve (8) is connected with the load sensing mechanism (9), and the load sensing mechanism (9) converts oil pressure into a stroke and transmits the stroke to the one-way variable pump-two-way motor (10) to serve as displacement control input of the one-way variable pump-two-way motor.
5. The onboard energy storage hydraulic system for the hydraulic bidirectional conversion of electric energy according to claim 1, characterized by further comprising a safety valve (3), wherein the accumulator (2) is connected with an oil return end of the onboard hydraulic system through the safety valve (3).
6. An onboard energy storage hydraulic system method for electric energy hydraulic bidirectional conversion, which uses the onboard energy storage hydraulic system for electric energy hydraulic bidirectional conversion according to any one of claims 1 to 5, and is characterized by comprising a conventional energy storage method, an emergency energy storage method, a mechanism execution method and a power generation method, wherein the conventional energy storage method is started when an energy accumulator is normally stored, the emergency energy storage method is started when the onboard energy storage hydraulic system fails, the mechanism execution method is started when a mechanism actuator works, and the power generation method is started when a motor-generator (12) works as a power generator;
in the method, the shuttle valve (8) transmits the pressure of the A end and the B end of the electromagnetic directional valve (6) through the two oil inlets, the pressure of the high-pressure side is transmitted to the load sensitive mechanism (9), and the load sensitive mechanism (9) adjusts the displacement of the unidirectional variable pump-bidirectional motor (10) according to the pressure, so that the displacement of the unidirectional variable pump-bidirectional motor (10) is smaller when the pressure is larger.
7. The method for the airborne energy storage hydraulic system for the electric energy hydraulic bidirectional conversion according to claim 6, wherein the conventional energy storage method is specifically as follows:
step one, an unloading control valve (4) and an energy storage control valve (5) are closed, and an oil supply end of an airborne hydraulic system supplies oil to an energy accumulator (2) through an oil supply one-way valve (1) until the oil pressure of the energy accumulator (2) is equal to the oil pressure of the oil supply end of the airborne hydraulic system;
and step two, stopping oil supply at an oil supply end of the airborne hydraulic system, keeping the electromagnetic directional valve (6) at a neutral position, opening the energy storage control valve (5), starting the motor-generator (12) as a motor, driving the unidirectional variable pump-bidirectional motor (10) to operate as a high-pressure pump through the speed changing device (11), pumping the oil at an oil return end of the airborne hydraulic system to the energy accumulator (2) through the energy storage control valve (5) after the oil is pressurized by the unidirectional variable pump-bidirectional motor (10) as the high-pressure pump until the oil pressure of the energy accumulator (2) meets the requirement.
8. The method for the airborne energy storage hydraulic system for the electric energy hydraulic two-way conversion according to claim 6, wherein the emergency energy storage method specifically comprises the following steps: the electromagnetic directional valve (6) keeps a neutral position, the energy storage control valve (5) is opened, the motor-generator (12) is started as a motor, the speed change device (11) drives the one-way variable pump-two-way motor (10) to operate as a high-pressure pump, the one-way variable pump-two-way motor (10) serves as a high-pressure pump, oil at the oil return end of the airborne hydraulic system is pressurized and then pumped to the energy accumulator (2) through the energy storage control valve (5) until the oil pressure of the energy accumulator (2) meets the requirement.
9. The method for the airborne energy storage hydraulic system for the electric energy hydraulic bidirectional conversion according to claim 6, wherein the airborne execution method specifically comprises the following steps:
the energy storage control valve (5) is closed, the unloading control valve (4) is opened, the electromagnetic directional valve (6) is switched to communicate the P end with the A end or the P end with the B end, the energy accumulator (2) releases oil pressure to drive the one-way variable pump-two-way motor (10) to operate as a motor, and the one-way variable pump-two-way motor (10) drives the airborne actuator to rapidly make required actions through the speed change device (11).
10. The method for the airborne energy storage hydraulic system for the electric energy hydraulic bidirectional conversion according to claim 6 is characterized in that the power generation method specifically comprises the following steps:
the energy storage control valve (5) is opened, the unloading control valve (4) is closed, the electromagnetic directional valve (6) keeps a middle position, the oil supply end of the airborne hydraulic system drives the one-way variable pump-two-way motor (10) to operate as a motor through the oil supply one-way valve (1) and the energy storage control valve (5), and then the motor enters the oil return end of the airborne hydraulic system; the unidirectional variable pump-bidirectional motor (10) drives the motor-generator (12) to serve as a generator to generate electricity through the speed changing device (11), the energy accumulator (2) helps to stabilize oil pressure, and the shuttle valve (8) and the load sensing mechanism (9) are matched with each other to stabilize the rotating speed of the unidirectional variable pump-bidirectional motor (10), so that the unidirectional variable pump-bidirectional motor (10) operates stably in a developed mode, and the motor-generator (12) generates electricity stably.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111592221.9A CN114321041B (en) | 2021-12-23 | 2021-12-23 | Onboard energy storage hydraulic system and method for electric energy hydraulic bidirectional conversion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111592221.9A CN114321041B (en) | 2021-12-23 | 2021-12-23 | Onboard energy storage hydraulic system and method for electric energy hydraulic bidirectional conversion |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114321041A true CN114321041A (en) | 2022-04-12 |
| CN114321041B CN114321041B (en) | 2023-09-22 |
Family
ID=81053700
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111592221.9A Active CN114321041B (en) | 2021-12-23 | 2021-12-23 | Onboard energy storage hydraulic system and method for electric energy hydraulic bidirectional conversion |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114321041B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104454715A (en) * | 2014-12-03 | 2015-03-25 | 华侨大学 | Novel secondary regulation system based on electrical control |
| CN107313674A (en) * | 2017-07-07 | 2017-11-03 | 北京航空航天大学 | An electric booster energy storage hatch door actuation system |
| DE102017002269A1 (en) * | 2017-03-07 | 2018-09-13 | German Gresser | Variable, externally rechargeable energy storage and conversion system for hybrid and electric cars |
| CN110374941A (en) * | 2019-01-09 | 2019-10-25 | 浙江大学 | A kind of the fork truck potential energy recovery system and control method adaptive according to load weight |
| CN110436344A (en) * | 2019-06-05 | 2019-11-12 | 天津大学青岛海洋技术研究院 | A kind of energy-saving winch type Active Heave Compensation System and method |
| CN210829914U (en) * | 2019-11-12 | 2020-06-23 | 湖南机电职业技术学院 | Energy recovery driving hydraulic system and engineering machinery vehicle |
| CN112855631A (en) * | 2021-02-03 | 2021-05-28 | 北京航空航天大学 | Hatch door actuating system |
| CN113027722A (en) * | 2021-04-30 | 2021-06-25 | 北京航空航天大学 | Multi-mode hydraulic energy and electric energy bidirectional energy conversion device and method |
| CN113700686A (en) * | 2021-09-02 | 2021-11-26 | 浙江大学 | Electricity-machinery-hydraulic pressure hybrid energy storage unit |
-
2021
- 2021-12-23 CN CN202111592221.9A patent/CN114321041B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104454715A (en) * | 2014-12-03 | 2015-03-25 | 华侨大学 | Novel secondary regulation system based on electrical control |
| DE102017002269A1 (en) * | 2017-03-07 | 2018-09-13 | German Gresser | Variable, externally rechargeable energy storage and conversion system for hybrid and electric cars |
| CN107313674A (en) * | 2017-07-07 | 2017-11-03 | 北京航空航天大学 | An electric booster energy storage hatch door actuation system |
| CN110374941A (en) * | 2019-01-09 | 2019-10-25 | 浙江大学 | A kind of the fork truck potential energy recovery system and control method adaptive according to load weight |
| CN110436344A (en) * | 2019-06-05 | 2019-11-12 | 天津大学青岛海洋技术研究院 | A kind of energy-saving winch type Active Heave Compensation System and method |
| CN210829914U (en) * | 2019-11-12 | 2020-06-23 | 湖南机电职业技术学院 | Energy recovery driving hydraulic system and engineering machinery vehicle |
| CN112855631A (en) * | 2021-02-03 | 2021-05-28 | 北京航空航天大学 | Hatch door actuating system |
| CN113027722A (en) * | 2021-04-30 | 2021-06-25 | 北京航空航天大学 | Multi-mode hydraulic energy and electric energy bidirectional energy conversion device and method |
| CN113700686A (en) * | 2021-09-02 | 2021-11-26 | 浙江大学 | Electricity-machinery-hydraulic pressure hybrid energy storage unit |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN117780747B (en) * | 2024-02-27 | 2024-05-07 | 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114321041B (en) | 2023-09-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105839689B (en) | The more motor hydraulic excavating mechanical electronic hydraulic hybrid drive systems of multiple-energy-source and control method | |
| CN108591193B (en) | Electric hydrostatic actuator system with energy recycling system | |
| CN103569352B (en) | For producing the method for hydraulic power, the application of hybrid power control unit and drive system in aircraft | |
| CN103803063A (en) | Self-energy feedback type brake apparatus-based airplane braking system and control method thereof | |
| CN104859626A (en) | Aircraft electro hydrostatic brake actuator | |
| CN205617466U (en) | Multipotency source many motors hydraulic shovel electricity liquid hybrid -driven system | |
| CN113027722B (en) | A multi-mode hydraulic energy and electric energy bidirectional energy conversion device and method | |
| CN113183736B (en) | Electro-hydraulic hybrid power system for loader oil and control method thereof | |
| CN211281453U (en) | Hydraulic swing-reducing oil circuit system for turning front wheels of airplane | |
| CN111071436B (en) | Mechanical-hydraulic aircraft front wheel turning anti-swing system | |
| CN112855631A (en) | Hatch door actuating system | |
| CN113682371A (en) | System for realizing parallel power-assisted steering function | |
| CN114278627B (en) | Onboard supercharging energy storage hydraulic system and method capable of converting electric energy and hydraulic energy | |
| CN114321041A (en) | Airborne energy storage hydraulic system and method for electric energy hydraulic bidirectional conversion | |
| CN111322328B (en) | Pump control cylinder hydraulic system for brake system actuation control | |
| CN113153854A (en) | Hybrid power hydraulic system and overhead working truck | |
| CN114889570B (en) | Electric control braking control system of mining vehicle and application method thereof | |
| CN105730681B (en) | Plane hydraulic system layout based on power-by-wire energy storage device | |
| CN111516858B (en) | Electric servo actuator | |
| CN106257060B (en) | Non-similar redundancy electric steering device | |
| CN103644175A (en) | Hydraulic drive system of component transferring trolley of nuclear fusion device | |
| CN111395906A (en) | Hydraulic control mechanism for airplane cabin door | |
| CN214874759U (en) | Multifunctional electromagnetic reversing valve type double-motor redundant braking system | |
| CN214533782U (en) | A hybrid hydraulic system and aerial work vehicle | |
| CN114321042B (en) | Onboard pressurizing energy storage flow compensation hydraulic system and method for electric backup |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |