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Oil mist generator theoretical and experimental study

Author: JiaLiBin
Tutor: ChenJianWen
School: Northeastern University
Course: Mechanical Design and Theory
Keywords: Oil mist lubrication Airflow ultrasonic mist generator Ultrasonic atomization Nebulizer gas flow Factors Atomization Surface tension Viscosity
CLC: TH117.2
Type: Master's thesis
Year: 2009
Downloads: 63
Quote: 2
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Abstract


Oil mist lubrication is an advanced lubrication, compared with conventional lubrication , enabling equipment to achieve high efficiency, low failure, energy-saving and environmentally friendly operation. In order to further the development of different types of oil mist lubrication device , the subject of the introduction of a new type of mist generator - air- ultrasonic mist generator . The atomizing mist generator ultrasonic atomization mechanism , namely the use of air jets through the cavity , a high-speed jet stream , resulting in high frequency , high amplitude ultrasonic severe vibration , while additional fluid through the post, to enhance atomization a spray technology that can get smaller mist particles. This paper describes the mechanism of ultrasonic atomization and ultrasonic atomizing nozzles research progress and describes several different types of structural characteristics of ultrasonic atomizing nozzle ; ultrasonic atomizing nozzle through research and analysis of the structure and processing technology , the design of air- ultrasonic mist generating device ; since gas atomization nozzle is widely used in industrial applications , it is combined with the existing spray nozzle to design and manufacture a second-rate external mixing atomizer nozzles. In order to detect the atomizer spray performance , especially built bench ; and in the experimental section focuses on air- atomizing nozzle to be tested. In the course of experimental study to measure the particle size of oil mist atomization mist generator important indicator , and select the air pressure and the distance between the needle and orifice flow atomizer is the most important effect of factor. By orthogonal experiments to determine the optimum atomization pressure value when the intake vent and the needle tip and the distance value , and determine which is the most critical factor. In addition to the nebulizer of the structure of the liquid atomization effect on the physical properties have a great impact . In the mathematical model can be qualitatively analyzed for surface tension and viscosity of liquid atomization effect ; by gas atomization nozzle based on experiments to determine the surface tension and viscosity on atomization effect , the final results of the theoretical analysis and do experiments to compare the results . This is a more in-depth study on the future atomization effect factors , providing experimental support . In summary, the design of the ultrasonic atomizing nozzle has a certain significance, but because ultrasonic atomizing mechanism is more complex, pending further research .

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CLC: > Industrial Technology > Machinery and Instrument Industry > Mechanics (mechanical design of the basic theory ) > Mechanical friction, wear and lubrication > Lubricating
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