Tracks (35), fastened to static structure of an aircraft engine nozzle, guide sliders (32) journaled in struts (27, 28) fastened to a flap (23) of the nozzle. Each slider and attached journal axle or bolt (33) is formed of cobalt, and each track slider surface (61) and journal bushings (43, 44) are
Tracks (35), fastened to static structure of an aircraft engine nozzle, guide sliders (32) journaled in struts (27, 28) fastened to a flap (23) of the nozzle. Each slider and attached journal axle or bolt (33) is formed of cobalt, and each track slider surface (61) and journal bushings (43, 44) are formed of a nickel alloy to reduce wear from rubbing. Track slides (40, 41) are mounted to the static structure of the nozzle by blind bolts (68) having a tool recess (70) at its threaded tip to prevent the bolt (68) from turning as a nut is secured. Each slider has limited rotation due to a pin (102), thereon engaging a slot in a tab (100) of the bushing (43) to assist in inserting the slider (32) into the beveled ends of the tracks (35, 36), when mounting or replacing a flap.
대표청구항▼
1. Apparatus (21) for an aircraft engine nozzle, comprising: an aircraft engine nozzle flap (23) moveable between first and second positions;at least one flap positioning arm (31) for moving the aircraft engine nozzle flap between the first and second positions;a plurality of guidance struts (27, 28
1. Apparatus (21) for an aircraft engine nozzle, comprising: an aircraft engine nozzle flap (23) moveable between first and second positions;at least one flap positioning arm (31) for moving the aircraft engine nozzle flap between the first and second positions;a plurality of guidance struts (27, 28), one end of each said plurality of guidance struts attached to the aircraft engine nozzle flap and another end of each said plurality of guidance struts having a bore;a plurality of guidance tracks (35, 36), each one of the plurality of guidance tracks secured to a static structure of the nozzle, each of said plurality of guidance tracks having two, spaced apart longitudinal sliding surfaces (61); anda plurality of track sliders (32), each disposed in a related one of the plurality of guidance tracks, each of the plurality of track sliders rigidly connected to an axle (33) journaled in the bore of corresponding said plurality of guidance struts, each of the plurality of track sliders having a first axis parallel with an axis of the axle and defining a width of each of the plurality of track sliders, each of the plurality of track sliders having a second axis perpendicular to the first axis and parallel with the longitudinal sliding surfaces of corresponding said plurality of guidance tracks and defining a length of each of the plurality of track sliders, and each of the plurality of track sliders having a third axis perpendicular to the first axis and the second axis and defining a thickness of each of the plurality of track sliders; characterized:top and bottom surfaces (54, 55) defined by the width and the length of each of the plurality of track sliders each having a crown with an apex parallel with the second axis to provide a single line of contact with a corresponding said longitudinal sliding surfaces. 2. Apparatus (21) according to claim 1 further characterized in that: each of the crown has a radius of curvature between 3.0 and 4.0 times the height of the slider (32). 3. Apparatus (21) according to claim 1 further characterized in that: the plurality of track sliders (32) is at least about twice as long as it is thick. 4. Apparatus (21) according to claim 1 further characterized in that: the intersections of the top and bottom surfaces of each of the plurality of track sliders (32) are rounded off. 5. Apparatus (21) according to claim 1 further characterized in that: each of the plurality of track sliders (32) and axle (33) comprise a nickel alloy and the longitudinal sliding surfaces (61) of the plurality of guidance tracks which are contacted by each of the plurality of track sliders comprise a cobalt alloy. 6. Apparatus (21) according to claim 1 further characterized in that: the bore of each said plurality of guidance struts has at least one bushing (43, 44) in contact with the axle (33) of related each of the plurality of track sliders (32). 7. Apparatus (21) according to claim 6 further characterized in that: the axles (33) comprise a nickel alloy and bushings (43, 44) comprise a cobalt alloy. 8. Apparatus (21) according to claim 6 further characterized by: a vibration dampening curved spring washer (45) disposed on each of the axle (33) on a side of related said plurality of guidance struts (27, 28) adjacent to each of the plurality of track sliders (32). 9. Apparatus (21) according to claim 1 further characterized in that: each of the axle (33) is threaded and secured to related said plurality of guidance struts (27, 28) with a threaded nut (52). 10. Apparatus (21) according to claim 1 further characterized by: the plurality of guidance tracks (35, 36) each comprising a frame (39) secured to the static structure of the nozzle and having track liners (40, 41) each comprising a sub-structure (60) with the longitudinal sliding surfaces (61) disposed thereon, each sub-structure having a plurality of slot pairs (64, 66) for capturing a blind bolt (68) with a thread-end tool recess (70) for bolting the track liners to the frame.
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이 특허에 인용된 특허 (1)
Ramlaoui, Jihad I.; Roberts, Stephen Michael; Forsey, David, Guide system for nacelle assembly.
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