A compressor includes a first stage of stator vanes having a first position and a second group of stator vanes arranged in two or more stages downstream from the first stage of stator vanes, each stage having a respective second position. A first actuator is engaged with the first stage of stator va
A compressor includes a first stage of stator vanes having a first position and a second group of stator vanes arranged in two or more stages downstream from the first stage of stator vanes, each stage having a respective second position. A first actuator is engaged with the first stage of stator vanes, and a second actuator is engaged with a bar connecting the second group of stator vanes. A method for operating a compressor includes adjusting a first position of a first plurality of stator vanes and adjusting the respective second positions of a second group of stator vanes separately from the first position of the first stage of stator vanes.
대표청구항▼
1. A compressor comprising: a first plurality of single-panel stator vanes arranged in a first stage and connected to a first rotating member, wherein the first plurality of stator vanes comprises inlet guide vanes located upstream of a first stage of rotating blades, and wherein each of the first p
1. A compressor comprising: a first plurality of single-panel stator vanes arranged in a first stage and connected to a first rotating member, wherein the first plurality of stator vanes comprises inlet guide vanes located upstream of a first stage of rotating blades, and wherein each of the first plurality of stator vanes has a first position and a first length;a first movement-inducing device engaged with the first rotating member for adjusting the first position of each of the first plurality of stator vanes;a second plurality of stator vanes arranged in two or more successive stages downstream of the first stage, each respective stage of the second plurality of stator vanes being connected to a respective rotating member and having a respective position, one of the two or more successive stages in the second plurality of stator vanes being adjacent the first plurality of stator vanes, the stator vanes in the one of the two or more successive stages having a second length less than the first length;a bar connecting the respective rotating members of the two or more successive stages of stator vanes downstream of the first stage;a second movement-inducing device engaged with the bar for adjusting, in unison, the relative positions of the second plurality of stator vanes in the two or more successive downstream stages;a control system configured to receive a first input representing a speed of the compressor and a second input representing an operating mode of the compressor; to use the first input and the second input to separately generate a first position command for the second plurality of stator vanes and a second position command for the first plurality of stator vanes; to use the first position command to provide a first control signal to the second actuator to adjust, in unison, the relative positions of the second plurality of stator vanes; and to use the second position command in combination with the first control signal to provide a second control signal to the first actuator for adjusting the first position of the first plurality of stator vanes;wherein the adjusting of the relative positions of the second plurality of stator vanes, as directed by the first control signal, is separate from and independent of the adjusting of the first position of the first plurality of stator vanes, as directed by the second control signal. 2. The compressor of claim 1, wherein each stator vane of the first plurality of stator vanes is connected to a vane arm, and wherein each vane arm is connected to the first rotating member, the first movement-inducing device being engaged with the first rotating member via a bridge. 3. The compressor of claim 1, wherein the second plurality of stator vanes is arranged in three successive downstream stages. 4. The compressor of claim 1, wherein each stator vane of the second plurality of stator vanes is connected to a vane arm, and wherein each vane arm in a respective stage of the two or more downstream stages is connected to the respective rotating member for the respective stage. 5. The compressor of claim 1, wherein the bar is located radially outward of the respective rotating members; and wherein the bar is engaged with the respective rotating members via bridges attached to the respective rotating members and turnbuckles attached, on first ends thereof, to the bridges and, on second ends thereof, to fittings attached to the bar. 6. The compressor of claim 1, further comprising a linear position sensor, the linear position sensor sensing at least one of the first position of the first plurality of stator vanes and the respective position of at least one stage of the second plurality of stator vanes, the linear position sensor providing a feedback signal to the control system. 7. The compressor of claim 1, wherein each of the first movement-inducing device and the second movement-inducing device is an actuator selected from the group consisting of a hydraulic actuator, a pneumatic actuator, and an electric actuator. 8. The compressor of claim 7, wherein each of the first movement-inducing device and the second movement-inducing device is an electric actuator. 9. A compressor comprising: a first plurality of single-panel stator vanes arranged in a first stage and connected to a first unison ring, wherein the first plurality of stator vanes comprises inlet guide vanes located upstream of a first stage of rotating blades, and wherein each of the first plurality of stator vanes has a first position and a first length;a first actuator engaged with the first unison ring for adjusting the first position of each of the first plurality of stator vanes;a second plurality of stator vanes arranged in two or more successive stages downstream of the first stage, each respective stage of the second plurality of stator vanes being connected to a respective unison ring and having a respective position, one of the two or more successive stages of the second plurality of stator vanes being adjacent the first plurality of stator vanes, the stator vanes in the one of the two or more successive stages having a second length less than the first length;a bar connecting the respective unison rings of the two or more successive stages of stator vanes downstream of the first stage;a second actuator engaged with the bar for adjusting, in unison, the relative positions of the second plurality of stator vanes in the two or more successive downstream stages;a control system configured to separately generate a first position command for the second plurality of stator vanes and a second position command for the first plurality of stator vanes; to use the first position command to provide a first control signal to the second actuator to adjust, in unison, the relative positions of the second plurality of stator vanes; and to use the second position command in combination with the first control signal to provide a second control signal to the first actuator for adjusting the first position of the first plurality of stator vanes;wherein the adjusting of the relative positions of the second plurality of stator vanes, as directed by the first control signal, is separate from and independent of the adjusting of the first position of the first plurality of stator vanes, as directed by the second control signal; andwherein the adjusting of the first position of each of the first plurality of stator vanes and the adjusting of the relative positions of the second plurality of stator vanes includes any combination of opening and closing adjustments, the any combination of opening and closing adjustments comprising a first combination of opening the first plurality of stator vanes and closing the second plurality of stator vanes and a second combination of closing the first plurality of stator vanes and opening the second plurality of stator vanes. 10. The compressor of claim 9, wherein each stator vane of the first plurality of stator vanes is connected to a vane arm, and wherein each vane arm is connected to the first unison ring, the first actuator being engaged with the first unison ring via a bridge. 11. The compressor of claim 9, wherein the second plurality of stator vanes is arranged in three successive downstream stages. 12. The compressor of claim 9, wherein each stator vane of the second plurality of stator vanes is connected to a vane arm, and wherein each vane arm in a respective stage of the two or more downstream stages is connected to the respective unison ring for the respective stage. 13. The compressor of claim 9, wherein the bar is located radially outward of the respective unison rings; and wherein the bar is engaged with the respective unison rings via bridges attached to the respective unison rings and turnbuckles attached, on first ends thereof, to the bridges and, on second ends thereof, to fittings attached to the bar. 14. The compressor of claim 9, further comprising a linear position sensor, the linear position sensor sensing at least one of the first position of the first plurality of stator vanes and the respective position of at least one stage of the second plurality of stator vanes, the linear position sensor providing a feedback signal to the control system. 15. The compressor of claim 14, wherein the linear position sensor senses the respective position of at least one stage of the second plurality of stator vanes and provides the feedback signal to the control system, the feedback signal being combined with the first position command to provide the first control signal. 16. The compressor of claim 9, wherein each of the first actuator and the second actuator is an electric actuator. 17. The compressor of claim 9, wherein the control system is provided with a first input representing a speed of the compressor and a second input representing an operating mode of the compressor, the first input and the second input being used to generate the first position command and the second position command. 18. The compressor of claim 17, wherein the operating mode is one of start-up, shutdown, off-line water wash, turndown, and hot day output, each operating mode having its own preprogrammed schedule of associated positions for the first plurality of stator vanes and the second plurality of stator vanes.
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