| 摘要 |
<p>PURPOSE:To allow a propeller of a ship to rotate below the specific minimum for the revolving speed of the prime mover, by furnishing a control circuit, by which a friction clutch is slip rotated in response to a driven machine revolving speed setting signal to indicate a speed below the minimum revolving speed of the prime mover. CONSTITUTION:If a number-of-revolutions setting device 50 is set to a level below the minimum number of revolutions Nmin of a prime mover 1, a number- of-revolutions setting device 51 emits a number-of-revolutions setting signal Ns for a propeller 3 as a slip number-of-revolutions signal N1s via a 6, and a number-of-revolutions setting device 54 emits the min. number of revolutions Nmin as a number-of-revolutions setting signal N2s via line 10. Thereby the prime mover 1 will operate at the minimum revolving speed Nmin, and the pressing force in a friction clutch 2 is controlled by slip signal N1s to provide slip condition. Thus the propeller 3 rotates at a speed below Nmin.</p> |
