Paster sandwich type bending and longitudinal complex-excitation passive water jet propulsion unit and drive method thereof

The invention discloses a paster sandwich type bending and longitudinal complex-excitation passive water jet propulsion unit and a drive method thereof, and the paster sandwich type bending and longitudinal complex-excitation passive water jet propulsion unit is used for solving the problems such as small driving force, lower power density and the like of a current piezoelectric hydraulic propulsion unit. The paster sandwich type bending and longitudinal complex-excitation passive water jet propulsion unit comprises valve stacks, valve metal substrates, end covers, supporting rubber rings, sealing rings, cavities, valve umbrella-shaped valves, pump umbrella-shaped valves, fastening bolts, pump drive assemblies, an amplifying diaphragm, a clamping block, a pump metal substrate, a front end cover and fastening bolts, wherein each cavity is provided with valve cavity water inlets, pump cavity water inlets and a funnel-shaped water outlet; the valve cavity water inlets and the pump cavity water inlets are provided with valve seats; and each water outlet is provided with a hydrophobic structure. An electric signal is applied to the valve stacks and the pump drive assemblies to excite the valve stacks and the pump drive assemblies to respectively generate deformation caused by expansion and shrinkage, so that the volumes of the valve cavities and the pump cavities are alternatively changed to realize fluid suction and ejection, and propulsion of the unit is realized under water spray counter-acting force. The paster sandwich type bending and longitudinal complex-excitation passive water jet propulsion unit has the advantages such as great drive force, high power density and the like, and has a wide application prospect in the fields of micro ejection, military detection and the like.