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Scottoiler industrialisation

Scottoiler industrialisation. A mechatronic study of a needle valve based fluid dispensing system R émi Zante. Summary. Problem Background Research Aims Initial Results Conclusions. The Problem. Problem background RMV-Reservoir Metering Valve Temperature issues New market

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Scottoiler industrialisation

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  1. Scottoiler industrialisation A mechatronic study of a needle valve based fluid dispensing system Rémi Zante

  2. Summary • Problem Background • Research Aims • Initial Results • Conclusions

  3. The Problem • Problem background • RMV-Reservoir Metering Valve • Temperature issues • New market • Controlled actuation required • Lubrication in industry

  4. Research Aim & Objectives • Aims: • Investigate micro-mechatronic design principals and their applications in precisions fluid system control • Objectives • Investigate understand and model fluid flow of RMV • Use model to develop an optimised mechatronic oiler system.

  5. LiteratureDesign Factors Linear Motors Solenoid Force Linear Actuators Linear Actuation System Control Systems Design Factors Spring Settings Hysteresis Backlash Tolerances Literature Programming Labview Design Factors PIC Program Data Logger Electronic & Digital control Mechanical Mecha tronics Literature Needle Valves Flow Control Design Factors RMV Temperature Valve Geometry Pressure Head Viscosity Fluid Literature Dripping Chaos Drop Dynamics

  6. Flow Analysis-Methodology • Previous studies • Unable to predict flow rates • Quality of data • Macro approach. • New approach • Drip timer with integrated temperature acquisition • Develop Explicative model. Inherently inaccurate (as all models are) but good fit to compensate for outside factors

  7. Initial Results • Fast response of drip rate to changes in temperature. • Drip rate more closely linked to case temperature than fluid temperature.

  8. 1/Drip Interval. 1/Sec Time Sec. °C °C

  9. Backed up by calculation: • The coefficient of linear thermal expansion of RMV body material, Diakon is 8-12m/°Cx10-5, ie in the lowest case 0.00008mm expansion per mm per °C. • Assuming changes of 20°C are possible. This equates to 0.01808mm expansion over 20°C. • Equivalent to 2 positions on rotation scale. • Potentially double flow rate

  10. Prototype build • Build and test • Test plot • Shows reliability plot of mechanism

  11. Oiler Rig System Diagram 12V Battery Oiler system Integrated Circuit Solenoid Reservoir RMV Reed Switch DAQ PC Magnate Chain Duty Cycle Control Machine/Simulator

  12. Specification • Self contained unit • 2L Capacity, approx. 1 Month • 400+ Solenoid actuations • 1 month battery life

  13. Test Duty Cycle Time Sec. Voltage V Time Sec.

  14. Contribution • New understanding of gravity feed needle valve • Not been studied in this way before • Low cost fluid control

  15. Next Steps • Generate and analyse test data • Develop fluid flow model • Use model for linear actuator design • Write thesis

  16. END Any Questions?

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