Design Analysis of HL-LHC Motorized Jack Components
This technical document provides detailed information on the design analysis of various components used in the HL-LHC motorized jack system. It includes boundary conditions, material specifications, strength requirements, and stress analysis of components such as push-pull rings, guide cylinders, RAM, and frame. The document outlines nominal positions, load cases, safety factors, and configuration details crucial for ensuring the structural integrity and functionality of the motorized jack system.
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HL-LHC motorized jack ukasz Krzempek 11.11.2021 logo area
-Fz Boundary conditions Extreme positions of jack s head Nominal position Z0 and Y0 at rate load in PUSH configuration Nominal position Z0 and Y0 at rate load in PIULL configuration PUSH configuration: Z+20mm and Y+10mm PULL configuration Z+20mm and Y-10mm Load case for longitudinal jack: Fz=172kN and Fy=27kN Load case for longitudinal jack + safety factor 1.5 Installation misalignment: 25mrad wrt vertical axis Z Inclination of the tunnel: 25mrad wrt X (longitudinal jack) Inclination of the tunnel: 25mrad wrt Y (transversal jack) Material Frame: S275J0 Jack s internal components:42CrMo4 (Q+T) (EN 10083-3) Fy PUSH configuration Transversal block (gear block) Lateral plate Bottom plate -Fz -Fy PULL configuration RAM Strength requirements Push-pull ring ASME (stress at rated load < 50% component s yield strength) EU directives (stress at 1.5 rated load < component s yield strength Guide cylinder logo area 2 .Krzempek TE-VSC-DLM
PUSH PULL RING According to EU directive below yield strength [MPa] According to ASME below yield strength [MPa] Von mises stress at load rate [MPa] Von Mises stress at 1.5 load rate [MPa] INCREASED HEIGHT OF PUSH PULL contact radius Nominal position (PUSH) 196.0 (contact) 275.5 (contact) Nominal position (PULL) 220.0 (radius) 315.0 (radius) HEIGHT 375.0 750.0 RADIUS PUSH position 222.0 (contact) 323.0 (contact) PULL position 340.0 (radius) 580.0 (radius) CONFIGURATION PUSH kN/mm PULL kN/mm Worst conditions [previous design] 55.0 [-8.0%] 38.2 [+8.0%] Nominal conditions [previous design] 82.0 [+9.0%] 61.2 [+15%] logo area 3 .Krzempek TE-VSC-DLM
GUIDE CYLINDER contacts According to ASME below yield strength [MPa] According to EU directive below yield strength [MPa] Von mises stress at load rate [MPa] Von Mises stress at 1.5 load rate [MPa] Nominal position (PUSH) 207.0 296.5 Nominal position (PULL) 152.5 234.0 250.0 500.0 PUSH position 234.0 344.0 PULL position 219.0 336.5 logo area 4 .Krzempek TE-VSC-DLM
RAM According to ASME below yield strength [MPa] According to EU directive below yield strength [MPa] Von mises stress at load rate [MPa] Von Mises stress at 1.5 load rate [MPa] Contact surfaces with guide cylinder Nominal position (PUSH) 180.0 259.0 Nominal position (PULL) 203.0 285.0 325.0 650.0 PUSH position 360.0 (thread) 204.0 PULL position 360.0 (thread) 209.0 logo area 5 .Krzempek TE-VSC-DLM
FRAME According to ASME below yield strength [MPa] According to EU directive below yield strength [MPa] Von mises stress at load rate [MPa] Von Mises stress at 1.5 load rate [MPa] Nominal position (PUSH) Installation points 75.0 111.0 Nominal position (PULL) 70.0 105.0 172.5 345.0 PUSH position 106.0 152.0 PULL position 100.0 140.0 To be rechecked following the last week weld modifications logo area 6 .Krzempek TE-VSC-DLM
SUM UP PUSH configuration frame as the weakest part in terms of stiffness PULL configuration frame and push pull ring as the weakest part in terms of stiffness NEXT STEPS Implementation of recent changes in the jack s frame Last studies on push pull ring Adjusting bolt first results (input and recheck of final design) logo area 7 .Krzempek TE-VSC-DLM
