| 摘要 |
A single-stage reducer gearbox for an aeroengine is to convert the input speed of an input shaft connected to a turbine shaft of the aeroengine to the output speed of an output shaft connected to a fan blade shaft of the aeroengine. The gear box has a pair of concentric ring gears comprising a large-diameter ring gear with a pitch diameter (A) and a small-diameter ring gear with a pitch diameter (D). A pair of concentric spur gears comprises a large-diameter spur gear with a pitch diameter (B) and a small-diameter spur gear with a pitch diameter (C). The large-diameter spur gear is engaged with the large-diameter ring gear, and the small-diameter spur gear is engaged with the small-diameter ring gear to form two engaged pairs. A carrier member is connected to the input shaft of the gearbox. One pair of the two engaged pairs is fixed on the carrier to operate as a planetary gear. One gear of the other pair of the two engaged pairs is fixed on a frame of the gearbox, and the other gear thereof is connected to the output shaft. The four gears satisfy relations (A = K+i, B = K, C = K-j, and D = K+i-j-j). |
