Solution

At the target station there are 18 beam channels, each with a 30 Te shutter mechanism used during experiments. Each shutter is operated by a Power Jacks 300kN E-Series Metric Machine Screw Jack type E1829 driven by a 7.5kW geared motor.

The screw jack has an inverted translating screw configuration with 500mm of stroke and 16mm lead driven by a 32:1 worm gear set. The standard design was customised to meet the exact customer installation and operation requirements. The special features ranged from large components such as a special lead screw to nuclear grade grease for screw and gear set lubrication.

Products Used

• Screw Jacks - E-Series Machine Screw
• System Components - Reduction Gearbox
• System Components - Electric Motor
• System Components - Coupling

Solution

A positioning manipulator used in partnership with the tokamak machine has the ability to carry out key operations, including removing and replacing beam limiter plates located in the outer wall of the Torus. The manipulator has an articulated boom that is 9 metres long and can handle loads weighing up to 1 tonne.

The main tilt and side tilt of the boom is controlled using 200kN E-Series metric machine screw jacks. For the main tilt a screw jack at the rear of the arm levers the arm about a point to angle it in a vertical plane. The screw jack for the side tilt mechanism pivots the arm radially around the central axis running along the length of the arm. For the required precision and accuracy anti-backlash screw jacks were specified in order to minimise positioning error at the end of the manipulator, as movement is magnified along the length of the arm.

Products Used

• Screw Jacks - E-Series Machine Screw with Anti-Backlash