Thrustor brakes are 3-phase, cast iron and assembly type. The braking pressure to the shoes is transmitted from the springs by means of an extremely rigid and simple lever/tie rod mechanism. Release of the brake shoes is effected by energising the 3-phase thruster, which overcomes the spring force and the shoes are moved clear of the drum by the lever/arm linkage system.
The improved design of the leverage system and linkage makes it possible to utilise only a portion (70 to 75 per cent), of the thruster stroke initially at the time of commissioning the brake, when the brake lining is new.
As the lining wears out, thruster stroke adjusts itself automatically and the wear of the lining has no effect on the braking torque.
The angle of the brake shoe makes the replacement and maintenance of the brake shoes easy at site.
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