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FREE FALL SOLUTION FOR CRAWLER CRANE

FREE FALL SOLUTION FOR CRAWLER CRANE. GENERAL OVERVIEW FOR LATTICE CRAWLER CRANES. Comer Industries is currently supplying swing drives, travel drives and all types of hoist drives (boom, main, whip, jib luffing) with Free-Fall options, for cranes up to 2000 ton lifting capacity.

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FREE FALL SOLUTION FOR CRAWLER CRANE

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  1. FREE FALL SOLUTION FOR CRAWLER CRANE

  2. GENERAL OVERVIEW FOR LATTICE CRAWLER CRANES • Comer Industries is currently supplying swing drives, travel drives and all types of hoist drives (boom, main, whip, jib luffing) with Free-Fall options, for cranes up to 2000 ton lifting capacity.

  3. SOLUTIONS FOR LATTICE CRAWLER CRANES PGR3503 + RB Luffing Hoist PGRF6503Hoist Drive PGA5003 + RBTravel Drive PG5003PR Swing Drive

  4. FREE-FALL Description Why Free Fall option: • Time saving on descending operations (save up to 40 min descending time) • Increase the machine productivity • Comer could present two solution according to customer needs with different characteristics Comer solution A (brake on slow stage) Comer solution B (brake on fast stage)

  5. FREE FALL Solution A (brake on slow stage) Working flow Free Fall flow Parking Brake Free Fall Brake FF Breaking flow

  6. FREE FALL Solution A, technical drawing

  7. FREE FALL Solution B (brake on fast stage) Floating planetary carrier allows minimum braking torque Working flow Free Fall flow Free Fall Brake FF Breaking flow Parking Brake

  8. FREE FALL Solution B, technical drawing

  9. FREE FALL Solution A vs. Solution B Comer solution A (brake on slow stage) Comer solution B (brake on fast stage) • Comer current production • Large Free-Fall brake is required to be effective on slow stage • Free-Fall brake could work as safety brake in case of sun gear failure • Comer project, still to be developed • Smaller brake could lead to cost saving but investment are required to develop the project • Additional safety Brake is required in case of sun gear failure

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