VARIABLE STATOR VANE MECHANISM
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United States of America Patent
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app pub date -
Jun 19, 2017
filing date -
Jul 18, 2016
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Abstract
A variable vane mechanism for adjusting the angle of stator vanes in a gas turbine engine is provided. The mechanism has a circumferentially extending drive ring that is driven by an actuator, and a guide surface that is radially inside the drive ring. The mechanism also has a centralising pin that is connected to the drive ring and also in slidable contact with the guide surface so as to be movable with the drive ring relative to the guide surface. The centralising pin allows both the drive ring to be connected to a stator vane (via a lever) in order to adjust the angle of the vane, and the radial position of the drive ring to be adjusted to ensure accurate and repeatable operation of the mechanism.
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