Planetary reducer for coaxial propeller reversing helicopter

Abstract

The invention discloses a planetary reducer for a coaxial propeller reversing helicopter. The planetary reducer comprises an intermediate transmission shaft, a primary sun gear fixed to the top of theintermediate transmission shaft, multiple primary planet gears in engaged connection with the primary sun gear, a primary inner gear ring engaged with the primary planet gears, a connecting frame forfixedly connecting the primary inner gear ring with an outer shaft, multiple secondary planet gears coaxial with the primary planet gears and a secondary sun gear which is coaxially arranged above the primary sun gear in a relatively-rotating manner and is in engaged transmission with the secondary planet gears. The secondary sun gear is in transmission connection with an inner shaft, the primaryplanet gears and the secondary planet gears are coaxially arranged in a one-to-one up-and-down correspondence manner, and the coaxial upper ends and lower ends of the primary planet gears and the secondary planet gears are rotationally connected with a fixed planet carrier. The reducer is provided with a group of primary planet gear train including one sun gear, the multiple planet gears and oneinner gear ring and a group of secondary planet gear train including one sun gear and the multiple planet gears and not including an inner gear ring. The reducer is provided with one fixed planet carrier shared by the primary planet gear train and the secondary planet gear train.

Description

technical field [0001] The invention belongs to the technical field of mechanical transmission devices, and in particular relates to a planetary reducer for a coaxial reverse propeller helicopter. Background technique [0002] The structural characteristics of the coaxial reverse dual-rotor are: two inputs + two outputs, that is, the entire transmission device has two power input shafts, which are respectively driven by two engines or electric motors, and two power output shafts output power externally. Two power input shafts drive two coaxial power output shafts through two sets of independent reduction gear mechanisms, and each power output shaft is connected to a rotor, thus forming the so-called coaxial reverse dual rotor drive technology. Since the two power output shafts are installed on the same axis (called coaxial), they drive their respective rotors to rotate in opposite directions during work, so the reaction torques generated by the two rotors also cancel each ot...

AI Technical Summary

Problems solved by technology

Various planetary reducers are widely used in manned helicopters, but general planetary reducers cannot realize the function of double-rotor coaxial reverse rotation

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