Dissertation > Excellent graduate degree dissertation topics show

The Research on a Nozzle/Diffuser Valve-less Piezoelectric Pump

Author: YuanYouChun
Tutor: HuangWeiQing
School: Nanjing University of Aeronautics and Astronautics
Course: Mechanical Design and Theory
Keywords: piezoelectric pump valve-less pump diffuser nozzle finite element
CLC: TH38
Type: Master's thesis
Year: 2006
Downloads: 148
Quote: 0
Read: Download Dissertation

Abstract


The Piezoelectric pump is a novel fluid pump, which utilizes the viration generated by the piezoelectric actuator to make liquid flow in a one-way or produce gydraulic pressure. Piezoelectric pump has simple construction, it gets widely applications in the field of aeronautics and astronautics, robot, car, medical apparatus, creature genetic engineering and micro-machine, etc.A conventional piezoelectric pump consists of two passive check valves connected to an oscillating diaphragm, which creates a one-way fluid flow. This kind of pump has a rather low working frequency because of the inertia of the pump’s action elements. Its flow rate is also fluctuating with variation of the chamber volume. Furthermore, movable parts of the check valves may suffer from problems such as wear and fatigue. This may result in reduced lifetime and reliability. There is also the risk that the valve action may cause damage to some sensitive fluids. Later, we had a new principle using the different flow properties of a diffuser and a nozzle. The flow-directing diffuser/nozzle elements have no movable parts. The pump’s lifetime and reliability is higher than the conventional one because that the actuator, drive mechanism and pump body may be fabricated integrally, and moreover, it has other advantages such as structure simple, fabrication costs low and miniaturization easy.Based on the research of primary characteristics of valve-less pump, we put forwards a new kind of Nozzle/diffusers valve-less piezoelectric pump, fabricate a machine and make some experimental researches. the flow in a valve-less pump chamber is studied.1、Based on the research results of out and in, this paper puts forwards a new kind of Nozzle/diffusers valve-less piezoelectric pump. We use the correlative hydromechanical knowledge to analyze working principle of the piezoelectric pump, obtain a calculation formula for piezoelectric pump’s theory discharge.2、The mathematical model of the diffuser/nozzle was built. Through the finite element method analysis to the flow channel by the software of ANSYS/FLOTRAN CFD, the velocity and pressure distribution and influence curve of flow were got.3、The flow field model of the valve-less pump was constructed by the software of FLUENT, and pressure contour and velocity vector graph was obtained, on the basic of former result the flow characteristic of the valve-less pump system can be recognized.4、We fabricate a principle kind of machine, and make some correlative experimental researches.

Related Dissertations

  1. Research on the Mainframe System of Powder Mixed EDM and the Craft Experiment,TG661
  2. EDM Electrode Wear Mechanism and Control Research,TG661
  3. Research on the Structure and Characteristics of Permanent Magnetic Coupling,TH139
  4. Finite Element Analysis and Structure Optimal Design for Combined Seal at Normal Temperature and Low Temperature,TH136
  5. Simulation Analysis on Temperature Stress of RCC Arch Dam and Its Construction Joints Design Research,TV642.2
  6. Simplified Analysis of Semi-Rigid Steel Frames under Vertical Loading,TU391
  7. Based on Nonliner Finite Element Analysis of the Infilled Wall Frame Structure,TU323.5
  8. The Flow Theroy Investigation of Compressor Cascade with Split,TK474.8
  9. Stability Analysis of Roller Compacted Concrete Gravity Dam Based on Time-history Method,TV642.2
  10. Study on the Design and Biomechanical Behaviors of Individualized Artificial Knee Joint,R318.1
  11. Design of Testing Equipment for Electronic Products,TN06
  12. S-lay Installation Analysis for Deepwater Pipeline,TE973
  13. Research on Intelligent Aerial Bomb for Forest Fire Fighting,S762
  14. Multi-pin Internal Fixation of Calcaneal Fractures in Finite Element Analysis,R687.3
  15. The Analysis and Comparison of Adjacent Segment Degeneration of the Finite Element Caused by Three Posterior Lumbar Fusion Style,R687.3
  16. The Establishment and Preliminary Application of the Three-dimensional Finite Element Model of Ankle Joint,R687.3
  17. Different Bottom Structure of Dental Brackets Affect the Adhesiveness-Three Dimensional Finite-element Analysis,R783.5
  18. Airborne radar antenna pedestal rapid design systems research and development,TN959.73
  19. Sham hose drum drive means and hydraulic system of the structure,TE973
  20. The magnetorheological damper mechanical properties and Gun Recoil,TB535.1
  21. Nonlinear Structural Dynamics Analysis and Optimization Design on Naval Gun Driver,TJ391

CLC: > Industrial Technology > Machinery and Instrument Industry > Pump > A variety of purposes
© 2012 www.DissertationTopic.Net  Mobile