초록 ▼

A variable stator vane arrangement for an axial flow compressor comprises a plurality of stages of variable pitch stator vanes each of which is operated by a respective control ring. The vanes in each stage are connected to the control rings by operating levers. An axially extending member is connec

A variable stator vane arrangement for an axial flow compressor comprises a plurality of stages of variable pitch stator vanes each of which is operated by a respective control ring. The vanes in each stage are connected to the control rings by operating levers. An axially extending member is connected to each control ring by operating links. The axially extending member is arranged in a plane substantially tangential to each control ring and is movable in the plane substantially tangential to the control rings to change the pitch of the variable pitch stator vanes. Hydraulic rams are provided to move the axially extending member. The hydraulic rams may be operated to give either proportional or non-proportional movement of the variable pitch stator vanes. A controller may use signals from position detectors positioned on the control rings or position detectors positioned on the hydraulic rams together with compressor parameters to control the pitch of the vanes.

대표청구항 ▼

A variable pitch stator vane arrangement for an axial flow compressor comprising: a stator structure; a plurality of stages of stator vanes, each stage of stator vanes having a plurality of circumferentially arranged radially extending stator vanes, each stator vane having a longitudinal axis, each

A variable pitch stator vane arrangement for an axial flow compressor comprising: a stator structure; a plurality of stages of stator vanes, each stage of stator vanes having a plurality of circumferentially arranged radially extending stator vanes, each stator vane having a longitudinal axis, each stator vane being mounted to the stator structure for rotation about its longitudinal axis so that each stator vane has a variable pitch; a plurality of control rings being arranged substantially coaxial with the compressor and surrounding the stator structure; a plurality of operating levers, the stator vanes in each stage being connected to a respective one of the plurality of control rings by the operating levers; an axially extending member positioned in a plane substantially tangential to each of the control rings, the axially extending member having a first end and a second end, the first and second ends being movable with respect to the stator structure but independently of said stator structure; a plurality of operating links, each control ring being connected to the axially extending member by a respective one of the operating links; and an actuator means for moving the axially extending member in the plane substantially tangential to the control rings, the actuator means comprising a first actuator connected to the axially extending member at a first location and a second actuator connected to the axially extending member at a second axially spaced location, the axially extending member being movable by the actuators in the plane substantially tangential to each of the control rings such that at least one of the control rings is rotated coaxially of the compressor to change the pitch of the stator vanes in the associated stage of stator vanes by rotating the stator vanes about their longitudinal axes.