| 摘要 |
1,040,814. Thrust reversal of jet propulsion engines. BOEING CO. March 13, 1964 [March 14, 1963], No. 10861/64. Heading B7G. A jet thrust reverser for a jet propulsion engine comprises a shutter member pivotally mounted on a fixed supporting structure for movement between an inoperative open position and an operative or reverse thrust position in which it closes the exhaust nozzle of the engine and diverts the exhaust gases forwardly through an opening in the said supporting structure, a connecting linkage, independent of the shutter member mounting a deflector door upon the said fixed supporting structure over the said opening for movement between an inoperative position, in which the door closes the said opening, and an operative, or reverse thrust position in which it receives exhaust gases directed forwardly through said opening by the said shutter member and actuator means for moving the shutter member and the deflector door between their said inoperative and operative positions. The apparatus comprises supporting structure 43 (Fig. 3, not shown) which carries pivotally mounted clamshell deflector members 11, 12 and outer deflector plates 13, 14 (Fig. 5, not shown). Considering the operating mechanism for the deflector plate 13 only, the plate is mounted at pivots 16, 30 on arm 18 of bellcrank 17 and link 31 respectively mounted on the structure by lugs 20, 33. The arm 19 of bellcrank 17 is connected to a further bellcrank 22, mounted on lug 23, actuated through link 24 by rod 25 of piston 26. In the cruise or inoperative position plate 13 is locked to structure 43 by lugs 41, 42 and by the toggle effect of the linkage and when being moved to the deflecting position the leading edge of the plate is initially depressed, the subsequent paths of the leading and trailing edges being shown by dotted lines. The clamshell members 11, 12 are mounted on a common pivot 44 (Fig. 5), about which they are rotated by arms 39a, 39b connected by links 38 to the tubular piston rod 37 of a piston 36, housed with piston 26 in a common cylinder 27. A control valve 50 is linked to piston rod 37 through an extension of arm 39b to control the sequential operation of the members 11 and 12 and deflector members 13 and 14. |
