Intake Gate Hoist : A high capacity fixed hoist mounted on an autonomous structure upstream of the turbine penstock used to raise or lower the intake gate.
The intake gate hoist is normally dedicated to one gate and is permanently attached to it, thus operating in a cold and damp environment.
Reliable and efficient intake gate hoist
Intake gate hoist requires extreme reliability as its operation can be required in case of emergency. Intake gate hoists should be designed to handle the extreme load conditions generated by motor stall torque in case of dynamic asymmetrical jamming of the gate in the embedded guides. Intake gate hoist should also be able to allow the controlled descent of the gate in case of power failure.