Actuator devices useable to change orientation of one or more vanes, including an actuator rod and an actuator device body configured to allow the actuator rod to move along the axis inside the actuator device body, and having an inlet flange configured to allow a third fluid to enter a space betwee
Actuator devices useable to change orientation of one or more vanes, including an actuator rod and an actuator device body configured to allow the actuator rod to move along the axis inside the actuator device body, and having an inlet flange configured to allow a third fluid to enter a space between the actuator device body and the actuator rod, and an outlet flange configured to allow the third fluid to exit the actuator device body. Besides providing a fluid seal between the first fluid and the second fluid, the third fluid may also heat the actuator rod thereby preventing ice formation.
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1. An actuator device useable to change an orientation of one or more vanes, the actuator device comprising: an actuator rod configured to transfer a force along an axis thereof, and comprising a first end exposed to a first fluid, and a second end exposed to a second fluid, the second end being opp
1. An actuator device useable to change an orientation of one or more vanes, the actuator device comprising: an actuator rod configured to transfer a force along an axis thereof, and comprising a first end exposed to a first fluid, and a second end exposed to a second fluid, the second end being opposite to the first end along the axis; andan actuator device body configured to allow the actuator rod to move along the axis inside the actuator device body, and comprising a first inlet flange configured to allow a third fluid to enter a space between the actuator device body and the actuator rod, a first outlet flange configured to allow the third fluid to exit the actuator device body, and a vent configured to allow at least one of a neutral fluid and the third fluid to exit the actuator device body,wherein the vent is located between the first inlet flange and a second outlet flange along the axis, andwherein the third fluid has a pressure larger than a pressure of the first fluid, and the first outlet flange is closer to the first end of the actuator rod than the first inlet flange. 2. The actuator device of claim 1, wherein the third fluid has substantially the same composition as the first fluid and the third fluid has a temperature different from a temperature of the first fluid. 3. The actuator device of claim 1, wherein the actuator rod further comprises a step located between a position of the first inlet flange and a position of a first outlet flange along the axis, wherein a first area of the actuator rod perpendicular to the axis, between the position of the first inlet flange and a location of the step is smaller than a second area of the actuator rod perpendicular to the axis, between the location of the step and the position of the first outlet flange. 4. The actuator device of claim 1, wherein the actuator device body further comprises: a second inlet flange configured to allow neutral fluid to enter a space in-between the actuator device body and the actuator rod; andsecond outlet flange configured to allow the neutral fluid to exit the actuator device body,wherein the first inlet flange and the first outlet flange are closer to the first end than the second inlet flange and the second outlet flange. 5. The actuator device of claim 1, wherein the neutral fluid comprises about 70% nitrogen. 6. The actuator device of claim 1, wherein the actuator device body further comprises a closed cavity in which the second fluid is confined, and a pressure of a neutral fluid entering the space is larger than a pressure of the second fluid. 7. The actuator device of claim 1, further comprising: a third fluid temperature regulator configured to change a current temperature of the third fluid before entering the first inlet flange. 8. A compressor, comprising: one or more vanes configured to determine at least one of a direction and an amount of a first fluid passing through the compressor; andan actuator device configured to apply a force to the one or more vanes, the actuating device comprising:an actuator rod configured to transfer a force along an axis thereof, and comprising a first end configured to be exposed the first fluid, and a second end configured to be exposed to a second fluid, the second end being opposite to the first end along the axis; andan actuator device body configured to allow the actuator rod to move along the axis inside the actuator device body, and comprising a first inlet flange configured to allow a third fluid to enter a space in-between the actuator device body and the actuator rod, a first outlet flange configured to allow the third fluid to exit the actuator device body, and a vent configured to allow at least one of a neutral fluid and the third fluid to exit the actuator device body,wherein the vent is located between the first inlet flange and a second outlet flange along the axis, andwherein the third fluid has a pressure larger than a pressure of the first fluid, and the first outlet flange is closer to the first end of the actuator rod than the first inlet flange. 9. The compressor of claim 8, wherein the third fluid has substantially the same composition as the first fluid and the third fluid has a temperature different from a temperature of the first fluid. 10. The compressor of claim 8, wherein the actuator rod further comprises a step located between a position of the first inlet flange and a position of a first outlet flange along the axis, wherein a first area of the actuator rod perpendicular to the axis, between the position of the first inlet flange and a location of the step is smaller than a second area of the actuator rod perpendicular to the axis, between the location of the step and the position of the first outlet flange. 11. The compressor of claim 8, wherein the actuator device body further comprises: a second inlet flange configured to allow neutral fluid to enter a space in-between the actuator device body and the actuator rod; andsecond outlet flange configured to allow the neutral fluid to exit the actuator device body,wherein the first inlet flange and the first outlet flange are closer to the first end than the second inlet flange and the second outlet flange. 12. The compressor of claim 8, wherein the neutral fluid comprises about 70% nitrogen. 13. The compressor of claim 8, wherein the actuator device body further comprises a closed cavity in which the second fluid is confined, and a pressure of a neutral fluid entering the space is larger than a pressure of the second fluid. 14. The compressor of claim 8, further comprising: a third fluid temperature regulator configured to change a current temperature of the third fluid before entering the first inlet flange. 15. A method of sealing a compressor fluid at a first end of an actuation bar and an environment at a second end of the actuation bar, the second end being opposite to the first end, and the actuation bar being configured to move along an axis, inside an actuator device body, the method comprising: providing a first flow of compressor fluid routed from an output of the compressor in a space between the actuator device body and an actuator rod, via a first inlet flange of the actuator body and a first outlet flange of the actuator body, wherein the compressor fluid in the first flow has a pressure larger than a pressure of the compressor fluid at the first end of the actuation bar, and the first outlet flange is closer to the first end of the actuator rod than the first inlet flange; andproviding a second flow of neutral fluid in the space between the actuator device body and the actuator rod, via a second inlet flange of the actuator body and a second outlet flange of the actuator body, wherein the first inlet flange and the first outlet flange are closer to the first end than the second inlet flange and the second outlet flange, and the second inlet flange is closer to the second end of the actuation bar than the second outlet flange. 16. The method of claim 15, further comprising heating or cooling the compressor fluid before providing the flow of the compressor fluid in the space between the actuator body and the actuator rod. 17. The method of claim 15, further comprising allowing at least one of the first flow of the compressed fluid and the second flow of the neutral fluid to exit the actuator device body via a vent, wherein the vent is located between the first inlet flange and the second outlet flange along the axis. 18. The method of claim 15, wherein providing the neutral fluid comprises injecting the second flow of the neutral fluid against a step in the actuator device body to generate a force along a direction that is opposite to a direction in which other force is generated by a flow of a first fluid at one end of the actuator device body, wherein the step is located between a position of the first inlet flange and a position of a first outlet flange along the axis.
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이 특허에 인용된 특허 (10)
Carle Jacques (Saint Martin D\Heres FRX), Cryopumps.
Salvage John W. ; Brasz Joost J., Method and apparatus for controlling interaction between variable guide vanes and variable diffuser of a centrifugal compressor.
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