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Analysis on Gas Squeeze-film Linear Guide Using Ultrasonic Vibration

Author: WeiBin
Tutor: MaXiZhi
School: Nanjing University of Aeronautics and Astronautics
Course: Mechanical Design and Theory
Keywords: Gas squeeze film Ultrasonic levitation Linear guide rail Coupling field Piezoelectric ceramics
CLC: TG375.4
Type: Master's thesis
Year: 2010
Downloads: 40
Quote: 0
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Abstract


The near-field ultrasonic levitation is a new type of support based on the principles of gas squeeze film , has important applications So far, however, the suspension mechanism have not fully explain . Described by theoretical and experimental analysis of the characteristics of a the ultrasonic excitation squeeze film . The ultrasonic excitation of the extruded film has a larger carrying capacity, and is capable of supporting the objects of the freely suspended . The piezoelectric gas squeeze film device by piezostack , Shaped device to motivate tray , ultrasound squeeze five parts of the film , suspended objects , its working mechanism related to electricity, solid , gas , sound , multi- field coupling . The coupling characteristics of the respective elements determines the characteristics of the extruded film . This article first established gas squeeze film pressure equation piezoelectric transducer electromechanical coupling equation and model fit shaped vibration equation , and the freely suspended body equations of motion to determine a more realistic field definite solution boundary and initial conditions of the problem . On this basis , through the application of ANSYS software and MATLAB program coupled solution of the governing equations . Numerical solution process , by squeezing the thickness change will inspire the pallets and suspension linked field coupling . The experimental study is divided into two parts, suspension validation experiments and linear rail design . Suspension experiments verify the theoretical conclusions made ??. Including the production of piezoelectric stack , poly horn design and processing , the selection and commissioning of the excitation power , displacement sensor and amplifier , sensor signal data acquisition and data processing . The linear guide rail can be applied in the field of production practice , a non- friction bearing or minimal friction means of transport, it is the use of piezoelectric ceramics and the elastic hinge generated ultrasound extruded film having a carrying capacity , which is ultrasound extruded film suspension theory application of an exploration and practice .

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CLC: > Industrial Technology > Metallurgy and Metal Craft > Metal pressure processing > Extrusion > Extrusion machinery and equipment > Extrusion tools, dies
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