The invention discloses a ship propulsion shafting longitudinal vibration control device based on piezoelectric stack-hydraulic micro-displacement amplifier. The device comprises an axial vibration measuring system, a thrust ripple controller, a power amplifier and a displacement control actuating mechanism which are sequentially in signal connection with one another; the displacement control actuating mechanism comprises a piezoelectric stack and a hydraulic micro-displacement amplifier; the piezoelectric stack is used for receiving an electrical signal sent by the power amplifier and generating a corresponding output displacement; the hydraulic micro-displacement amplifier comprises a hydraulic amplification cavity with openings in two ends; two ends of the hydraulic amplification cavity are respectively in seal fit with a large piston and a small piston; the large piston interacts with the displacement output end of the piezoelectric stack; the small piston interacts with a thrust bearing of a ship propulsion shafting system by virtue of a sliding valve core. The piezoelectric stack is rapid in dynamic response and capable of representing the magnitude of longitudinal vibration which is generated on the ship propulsion shafting system in real time; the output displacement of the piezoelectric stack is amplified by the hydraulic micro-displacement amplifier and acts on the thrust bearing, and a reverse axial control force is generated, so that displacement compensation is realized.
Ship propulsion shafting longitudinal vibration control device based on piezoelectric stack-hydraulic micro-displacement amplifier
2015-05-06
Patent
Electronic Resource
English
IPC: | B63H Schiffsantrieb oder Steuerung der Schiffe , MARINE PROPULSION OR STEERING / G01L Messen von Kraft, mechanischer Spannung, Drehmoment, Arbeit, mechanischer Leistung, mechanischem Wirkungsgrad oder des Drucks von Fluiden , MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE |
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