| 摘要 |
PROBLEM TO BE SOLVED: To provide a variable pitch propeller driver for preventing a deviation of a mounting angle of a variable pitch blade when an operation of the mounting angle of the blade is not necessary, and when a power to a motor driver is interrupted or a control function of the motor driver is not normally operated in an emergency. SOLUTION: An exciting operation type electromagnetic clutch passed between a reduction gear coupled to a unit carried on a rotary main shaft 1 of an impeller to convert a rotary motion into a reciprocating motion and a motor rotor shaft and combined on the shaft, and a non-exciting operation type electromagnetic clutch, are installed on a steady trestle. If the power to the motor driver is interrupted and a controlling function of the motor driver is not normally operated when an angle operation of the variable pitch blade is not required, exciting is interrupted, a motor rotor shaft and a reduction gear input shaft are disconnected. Meanwhile, the reduction gear input shaft is coupled to a reduction gear case mounted on the rotary main shaft, and rotated at the synchronizing speed with the rotary main shaft.
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