Airborne energy storage hydraulic system and method for bidirectional conversion of electric energy and hydraulic pressure

Abstract

The invention belongs to the field of aircraft hydraulic systems, and discloses an airborne energy storage hydraulic system and method for electric energy hydraulic bidirectional conversion, and the system comprises an energy accumulator, an electromagnetic reversing valve, an energy storage control valve, a pump-motor, a speed change device and a motor generator; the oil supply end of the onboard 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 reversing valve; the oil return end of the onboard hydraulic system is connected with the pump-motor to serve as an oil inlet of the pump; and the pump-motor is respectively connected with the airborne actuator and the electric-generator through the speed change device. Electric pressurization energy storage is adopted on the basis of the pressure grade of the airborne hydraulic system, the energy storage efficiency is higher than that of a motor pressurization energy storage method, the instantaneous high-power airborne hydraulic user actuation time is shortened, the installed power of the aircraft hydraulic system is reduced, the system weight does not need to be increased, and the cost is reduced. And better economical efficiency is achieved, and the electric energy and hydraulic energy conversion function is achieved.

Description

technical field [0001] The application belongs to the field of aircraft hydraulic systems, and relates to a hydraulic system with energy storage function and two-way conversion of electric energy and hydraulic energy, in particular to an onboard energy storage hydraulic system and method for two-way conversion of electric energy and hydraulic energy. Background technique [0002] Multi-electricity is the development direction of modern aircraft. With the continuous development and maturity of power transmission technology, unmanned aerial vehicles have widely used EMA and other high-power electrical equipment, and large aircraft are gradually adopting power transmission systems when selecting power systems The combined action of actuators and hydraulic servo actuators improves the economy, safety, environmental protection and comfort of the aircraft. [0003] In the entire flight mission profile of the aircraft, hydraulic users such as aircraft landing gear, nose wheel steer...

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Problems solved by technology

The patent [Application No.: 201710554447.7] and the patent [Application No.: 201710554477.8] respectively propose a hydraulic and electric pressurized energy storage hatch actuation system, but they do not have the functions of mutual conversion between electric energy and hydraulic energy and emergency energy.

The patent [application number: CN202110478639.0] proposes a multi-mode hydraulic energy and electric energy bidirectional energy conversion device and method, but this method does not have load adaptability. When the main hydraulic system of the system is working, the hydraulic pump motor unit must work at Energy storage or power generation mode, will result in some degree of energy waste

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