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Valve Design Project

Valve Design Project. Group 2. Erol Searfoss Rena Rudavsky Seth Karpinski Jason Lichtman. MECE E3409. 11/15/05. Design Objectives. Create a valve system that delivers air power to a pneumatic cylinder setup Must deliver power at appropriate timing Must have fewest parts possible

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Valve Design Project

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  1. Valve Design Project Group 2 • Erol Searfoss • Rena Rudavsky • Seth Karpinski • Jason Lichtman MECE E3409 11/15/05

  2. Design Objectives • Create a valve system that delivers air power to a pneumatic cylinder setup • Must deliver power at appropriate timing • Must have fewest parts possible • Must be cheaply and easily machined • Must produce the highest RPM and torque possible

  3. History of CAM Decision 3 Design Paradigms • In-Line • Cam Follower • Custom Advantages of Cams • Historical Success • Less-complex machining (Pro-E aided) • Can design to reduce friction • Roller-Follower • Reduce shaft/housing interface

  4. Close-Up

  5. Side View

  6. Valve Design • Shaft • Machining • Purchased shaft, then customized • Machining Hours: 1 • Anodized Aluminum, $2.16 • Robustness: • No tolerancing • Housing • Machining • Machined both sides at once • One position in CNC • Machining Hours: 1 • Aluminum, $7.45 • Minimal tolerancing • Small shaft/housing interface (low friction)

  7. Valve Design • Cam • Design: slight concavity, large diameter • Unit Cost: $ 2.59 • Machining Cost: $ 62.50 • Mounting Bracket • Design: mounts valve system to breadboard • Unit Cost: $ 8.54 • Machining Cost: $ 50.00 • Back Bracket • Design: mounts spring • Unit Cost: $ 0.13 • Machining Cost: $ 37.50

  8. Design and Cost Total Cost = $282.17 • Design Summary • Roller Follower • Unique Cam Design • Low Friction • Simple Machining • Minimal Tolerancing • Possible Alternatives • Over-the-Counter Bracket and Back Bracket • Overall Saving: ~ 30% of total cost

  9. Side View

  10. Bird’s Eye View

  11. Close-Up

  12. Full View

  13. Design and Cost Total Cost = $282.17 • Design Summary • Roller Follower • Unique Cam Design • Low Friction • Simple Machining • Minimal Tolerancing • Possible Alternatives • Over-the-Counter Bracket and Back Bracket • Overall Saving: ~ 30% of total cost

  14. Engine Performance Maximum Operating Speed: 458 rpm (7.73 Hz) Maximum Torque: 108 Lbf*in (12.2N*m) Maximum Torque while in motion: 30Lbf*in 240rpm Maximum Power 45kLbr*in/min • Maximum theoretical data exceeds maximum experimental data. • Why?

  15. Engine Performance Cont.. • Average experimental data exceeds average theoretical data. • Why? • Experimental average torque vs. angular velocity while in motion is very similar to theoretical. • Why?

  16. Summary • General Strengths of Design • Easily Machined • Fully Adjustable • Minimal Tolerancing • Minimal Friction • Total Cost: $282.17 • High Speed (458 RPM) • Torque (108 lbf·in) • Ability to Run at Low RPM (240 RPM)

  17. In Action Please divert your attention to the valve system display at the front of the room

  18. Questions?

  19. Bill of Materials

  20. Dimensions

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