Transcript ppt
TKR-Grid I/F Design Options TKR Flexure TKR Flexure Shoulder Bolt (close fit) Shoulder Bolt Grid Grid Conical Bushing 1 Collar/Pin with conical head (pressed in) 2 Light pressed pin takes all shear load. Bolt simply holds pin in place. Need to work out method for extraction TKR-Grid I/F Design Options Shoulder bolt TKR Flexure Grid Shoulder insert (close fit) TKR Flexure Custom Shoulder Bolt with tapered end (close fit) Grid 3 Tapered split rings to expand radially under axial compression Grid Constant Force Washer 4 TKR-Grid I/F Design Options (fastener locking) •Lock wire •Key insert •Set screw •Liquid Shim on shoulder •“Battery terminal” on side flexures •Urelane (loc-tite) threads TKR-Grid I/F Design Options (key decision) •Conical bushing (concept 1) favored for corner flexures •Issue: Imparted loads due to enforced displacement – need to look into maximum allowable enforced skew of TKR bottom tray •Issue: imparted hoop stressed in flexure •Action for Tom Borden: how to modify tooling to put conic into existing flexures (enough room for taper?) •Action – ensure taper is not a self-locking taper •Action – check loads on flexure and bottom tray •Liquid Shim at side flexures (zero tolerance plus positive locking) – need to ream existing holes to achieve 0.030 clearance or grind down shoulder, plus injection port, split washer, etc. •Action – Martin to talk with Rob Black regarding injection and liquid shim 0.551” TKR-EM Tower Path to Re-vib (T. Venator) 1. Grid I/F redesign concept • Define concept • Define Schedule • New Vib Plates 2. Flexure tray I/F analysis redesign? 3. Analysis of all tower fastener torques and locking features 4. Resolve sidewall design options • 120 degree fastener heads • Mid tray mods, etc.