Research On Water-jet Propulsion Device Baseal On Circular Piezoelectric Pump

A new application field of piezoelectric jet propulsion device is a combination ofpiezoelectric pump technology and water jet propulsion technology, which provide a newresearch direction to underwater drive unit. On the basis of full analysis of progress, basedon the principle of bionics and inverse piezoelectric effect of piezoelectric materials, designand manufacture of the piezoelectric water jet propulsion device, and device power parts-piezoelectric backstepping spray the structural parameters of the flow pump, workingprinciple and the vibration properties of the piezoelectric vibrator theoretical analysis andexperimental testing. The main work is as follows1.The Water jet propulsion device status and prospectsThrough access to relevant information, comprehensive analysis and research onunderwater drive the development of history and prospects of applications. Micro drivesincluding the bionic drive and piezoelectric devices, piezoelectric drive unit with its ownadvantages and can be used in high efficiency, large-scale, long underwater operations; canalso be used in the hidden strong motor high-performance, serious areas of electromagneticinterference.2. Analysis and experiments on the piezoelectric actuatorAn important part of the piezoelectric jet propulsion device is a piezoelectric thrustreverser jet pump, the pump core driver components for the pros and cons of thepiezoelectric vibrator, and its performance directly affects the performance of thepiezoelectric pump. In this paper, basic theory of piezoelectric chosen circular bimorphspiezoelectric oscillator performance testing, test platform, test drive signal on thepiezoelectric vibrator, come to the driving voltage of the sine wave when the piezoelectricvibrator vibration performance of the best, and tested different frequencies and voltages ofthe piezoelectric vibrator performance. The piezoelectric vibrator supporting modepiezoelectric vibrator relationship with the preload deformation for the design of superiorperformance piezoelectric thrust reverser jet pump to provide a theoretical basis.3. The impact and analysis of the basic parameters of Piezoelectric Water Jet PumpStructural factors of the research pump thrust reverser jet pump piezoelectric vibrator ofpiezoelectric effects, including the cavity height, the shape of the buffer chamber, the lengthof the flow channel and exit with or without chamfer the center of the amplitude of thepiezoelectric vibrator. Create a piezoelectric thrust reverser jet pump spray dynamics modelis derived through the analysis of kinetic parameters, the theoretical jet propulsion devicepropulsion and propulsion speed. Obtained piezoelectric backstepping speed of the jet pumpand thrust with piezoelectric oscillator amplitude, frequency, fluid density, diameter of thespray stream. 4. The structural design and working principle of piezoelectric jet propulsiondeviceThe two common cut-off valve cantilever valve and the umbrella valve for comparisonand analysis, the umbrella valve has a large flow area, and high self-priming performance,apply to the high-output flow pump. The cantilever valve is suitable for high output pressureof the pump, in addition to the umbrella valve works. Obtained in order to obtain larger jeteffect umbrella rubber valve should be used as a cut-off valve. Backstepping design of the jetpump and dual-valve piezoelectric single entry is based on the theory, the umbrella-shapedrubber valve check valve, designed a number of entrance different entrance direction and thedual-oscillator valve piezoelectric backstepping spray flow pump, and to analyze theirstructure and working principle. Also studied the piezoelectric thrust reverser jet pumpchamber pressure distribution law, and two common outflow axis flow and radial outflowinstructions easier to improve the pressure derived radial outflow electrical thrust reverser jetpump performance. In addition, deduced the principle of orifice flow, the more superiorpiezoelectric performance for the design of thrust reverser jet pump provides a theoreticalbasis.5. The performance test and research of piezoelectric jet propulsion deviceDevelop Multi entrance multi-valve,two-valve single entry double-valve pump threedifferent water ways piezoelectric thrust reverser jet pump test prototype. Build apiezoelectric thrust reverser jet pump test platform and test of piezoelectric thrust reverser jetpump output performance. Production piezoelectric jet propulsion device, set up a testplatform to test the speed and thrust of the device, and come to different water-jet propulsiondevice performance variation at different frequencies.