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CERN European Organization for Nuclear Research

CERN European Organization for Nuclear Research. Actuating system of the LHC Collimators (Phase 1) Main Features Alessandro Bertarelli TS dept. - MME Group May, 12 2005. TECHNICAL DESIGN Mechanical Assembly. Vacuum Tank. Beam axis. Actuating system. External adjustment motor.

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CERN European Organization for Nuclear Research

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  1. CERN European Organization for Nuclear Research Actuating system of the LHC Collimators (Phase 1) Main Features Alessandro Bertarelli TS dept. - MME Group May, 12 2005 A. Bertarelli CERN TS – MME Group

  2. TECHNICAL DESIGN Mechanical Assembly Vacuum Tank Beam axis Actuating system External adjustment motor Overall length: 1480mm Tank width: 260mm A. Bertarelli CERN TS – MME Group

  3. TECHNICAL DESIGN Collimator Cross-section Jaw (25x80x1200 mm) Support Bar Cooling Pipes Clamping springs Bellow Return Spring Stepper Motor A. Bertarelli CERN TS – MME Group

  4. TECHNICAL DESIGN Actuating System 1 1 Each jaw is supported by two pivoting steel axles, allowing rotational adjustment and axial expansion. A. Bertarelli CERN TS – MME Group

  5. TECHNICAL DESIGN Actuating System 2 1 2 1 Each jaw is actuated by 2 stepper-motors (200 steps/rev) Each motor drives a specially coated steel roller screw (2 mm lead, i.e. 10 mm/step) A. Bertarelli CERN TS – MME Group

  6. TECHNICAL DESIGN Actuating System Support fixed plate Slidingtable Linear guideways (schematic) Sliding table The axle is connected to a sliding table The table can slide on a support fixed plate via linear guideways A. Bertarelli CERN TS – MME Group

  7. TECHNICAL DESIGN Actuating System 1 1 A return spring (with adequate spring rate) per each axle allows play suppression and ensures jaw retraction in case of motor failure A. Bertarelli CERN TS – MME Group

  8. TECHNICAL DESIGN Actuating System Grooves on this pinion allow angular play Rack Pinion A rack and pinion system links the two axles. A play on one of the pinions allows a maximum relative gap of +/- 3 mm A. Bertarelli CERN TS – MME Group

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