Hydraulic power unit including ceramic oscillator and hydraulic engine including the hydraulic power unit

摘要

A hydraulic engine (100) includes: a housing (110); a rotor (130) that is rotatably supported in the housing and allows rotor blades (132) to be disposed therearound; a plurality of hydraulic power units (200) that are disposed around the rotor to be spaced apart from one another; and an output shaft (120) that rotates as the rotor rotates and the output shaft protrudes beyond the housing, wherein a fluid extruded from hydraulic power units pressurizes the rotor blades and generates a rotational force of the output shaft. Each of the hydraulic power units comprises an oscillator, which is preferably deformed by a piezoelectric actuator.