HYDRAULIC POWER PACKAGE FOR AN AIRPLANE FOR SIMPLIFYING STRUCTURE AND SECURING INTENSIVE MAINTENANCE AND MANAGEMENT BY INSTALLING A CHECK VALVE, A FILTER UNIT, A SYSTEM SELECTION UNIT, A STORAGE UNIT, A PRESSURE CONVERTER, AND A GROUND CONNECTION UNIT IN ONE MANIFOLD

摘要

PURPOSE: A hydraulic power package for an airplane is provided to pressurize hydraulic oil before starting an engine by operating a reservoir piston together with a high-pressure cylinder by a spring. CONSTITUTION: A hydraulic system for an airplane is composed of a hydraulic pump and a hydraulic power package comprising a check valve(21), a filter unit, a system selection unit, a storage unit, a pressure converter(25), and a ground connection unit. The storage unit comprises a reservoir cylinder(24a); a reservoir piston(24b) installed in the reservoir cylinder; an end cap(24c) combined at the end of the cylinder; a high-pressure cylinder(24d) joined with the end cap; a high-pressure piston(24e) disposed in the high-pressure cylinder to operate the reservoir piston; and a spring(24f) for pressurizing the reservoir piston. The spring is installed between the reservoir piston and the end cap.