FIELD: transport.
SUBSTANCE: invention relates to aircraft engineering and may be used in rotor main transmissions. Main rotor transmission comprises housing accommodating gearings and shafts, input stage arranged at an angle to rotor shaft in helicopter lengthwise axis. Input stage is equipped with overrunning clutch with built-in impeller to force oil out. Said impeller is composed of flat disc with shaped vanes arranged on both sides of disc periphery. Clearance Δ between vanes and clutch case walls in the plane of rotation equals or is smaller than relation between width B of impeller working part and vane height H. Clutch case has oil discharge channel communicated with impeller working chamber. Impeller vane profile in disc plane is circumscribed by circular arcs while discharge channel is conjugated at the level of impeller working chamber diameter.
EFFECT: better lubrication of overrunning clutch.
2 cl, 5 dwg
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