دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: the number of revolutions per minute that an engine slows down from running at maximum no-load speed to running at maximum full-load speed. Speed droop should not exceed 7%.

n: a governor that provides a decrease in prime mover speed for any increase in load or an increase in prime mover speed for any decrease in load.

n: a dual-speed traveling block, which permits one elevator to pick up stands as they are broken out while the traveling block continues to move.

n: a set of gears installed between a prime mover and the equipment it drives to reduce the running speed. For example, on a beam pumping unit, the engine may run at a speed of 600 revolutions per minute, rot the pumping unit it drives may need to operate at 20 strokes per minute. The speed reducer makes it possible to obtain the correct pump speed.