Turboengine air intake provided with a controlled filter system
View Patent ↗An air intake ( 2 ) for a turbine engine, and a method implemented by the air intake ( 2 ) are disclosed. The air intake ( 2 ) is provided with a filter system ( 10 ) including foldable filter elements ( 11 ), arranged at the inlet section ( 3 ) of the air intake ( 2 ). In addition, the filter system ( 10 ) includes control elements ( 11 ) that exert a force along a first direction (Y) on the free end ( 11 ′) of the foldable filter elements ( 11 ) to adjust the filtering power of the filter system ( 10 ), guide members ( 12 ) of the filter system ( 10 ) serving to guide the movement of the free end ( 11 ′) induced by the control elements ( 13 ).
1. An air intake having a passage for guiding incident air to an aircraft turbine engine, said air intake being provided with an inlet section through which air penetrates into said passage, and being provided with a filter system, wherein the filter system is provided with foldable filter means arranged at the inlet section of the passage, said filter system including control means that exert a force in a first direction on a free end of said foldable filter means for compressing or relaxing said filter means during operation in order to vary the dimension of said filter means to adjust the filtering power of the filter system, guide means of the filter system serving to guide the movement of the free end induced by said control means.
2. An air intake according to claim 1 , wherein said control means are arranged outside said passage.
3. An air intake according to claim 1 , wherein said first direction presents an angle lying in the range 75 degrees to 125 degrees relative to a second direction along which air passes through said inlet section.
4. An air intake according to claim 1 , wherein said foldable filter means comprise a plane filter having fibers, said plane filter being concertina-folded so that the size of the foldable filter means along said first direction can be varied.
5. An air intake according to claim 1 , wherein said guide means comprise at least one grid placed upstream from the filter means relative to the flow direction of air through the filter system.
6. An air intake according to claim 5 , wherein said filter system is provided with heater means for heating said grid.
7. An air intake according to claim 1 , wherein said control means compress or extend the filter means to vary the size thereof along said first direction, as a function of requirements.
8. An air intake according to claim 7 , wherein, when said size is maximized, the filter means project beyond the inlet section.
9. An air intake according to claim 1 , wherein said filter means are contained in a plane, wherein said control means comprise at least one actuator arranged in said plane to exert a force on the filter means along said first direction.
10. An air intake according to claim 1 , wherein said filter means comprise at least one filter portion describing a circular arc.
11. An air intake according to claim 10 , wherein said control means comprise an actuator and a hoop secured to the free end of each filter portion of the filter means, said actuator being suitable for imparting a turning movement to said hoop about its center of rotation.
12. An air intake having a passage for guiding incident air to an aircraft turbine engine, the air intake being provided with an inlet section through which air penetrates into the passage, and being provided with a filter system, wherein the filter system is provided with a foldable flexible filter arranged at the inlet section of the passage, the filter system including an actuator capable of exerting a force in a first direction on a free end of the foldable flexible filter for compressing or relaxing the filter during operation in order to vary the dimension of the filter along the first direction to adjust the filtering power of the filter system, and a guide disposed on the air intake adjacent the foldable filter to guide the movement of the free end of the filter induced by the actuator.
13. An air intake having a passage for guiding incident air to an aircraft turbine engine, the air intake being provided with an inlet section through which air penetrates into the passage, and being provided with a filter system, wherein the filter system is provided with a folded filter arranged at the inlet section of the passage and having a free end, the filter system including an actuator capable of exerting a force in a first direction on the free end of the folded filter during operation for varying the dimension of the filter along the first direction within the inlet section to adjust the filtering power of the filter system, and a first guide grid disposed on the air intake adjacent and outboard the filter to guide the movement of the free end of the filter along the first direction induced by the actuator.
14. An air intake according to claim 13 further comprising a second guide grid disposed on the air intake adjacent and inboard the filter such that the filter is disposed between the guide grids.