| 摘要 |
<p>A bypass valve system includes an annular frame defining between outer (90) and intermediate (58) casings a cavity with an annular opening including a plurality of bypass valve doors (88) disposed therein. An annular actuation ring (94, Fig. 2) is disposed in the frame cavity and a plurality of links (110) is pivotally connected between the ring (at 112) and the bypass valve doors (at 114). Each of the links includes a longitudinal axis and means (118) are provided for rotating the actuation ring between a first position wherein each link longitudinal axis has a first inclination angle ( alpha ), and the doors are in a first open position and a ring second closed position wherein the link longitudinal axis has a second inclination angle ( alpha 2) less than the first inclination angle so that the links pivot the doors about a door first end (100) to position the door in a door second position. The angles alpha , alpha 2 being relative to the centreline 96 of the engine (note figures 3, 4). <IMAGE></p> |
