Tail rotor variable distance outer sleeve of helicopter

Abstract

The invention discloses a tail rotor variable distance outer sleeve of a helicopter. The tail rotor variable distance outer sleeve comprises a sleeve body. An installation hole is formed in the middle portion of the sleeve body in the axial direction. A bearing installation check ring is arranged in the installation hole. The top of the sleeve body is recessed downwards in the axial direction to form multiple fastening screw holes so that a gasket can be arranged. The bottoms of the fastening screw holes can extend to the surface of the bearing installation check ring so that the bearing installation check ring can be prevented from moving outwards through the gasket. Two bosses extend outwards from the outer side wall of the sleeve body. The bosses are recessed inwards in the radial direction of the sleeve body to form connecting screw holes so that the bosses can be connected with a tail rotor variable distance rod. A bearing is sleeved with the tail rotor variable distance outer sleeve through the installation hole, and the tail rotor variable distance outer sleeve can drive a tail rotor variable distance sleeve to slide on a tail shaft, so that the dip angle of each rotor blade is changed through a tail rotor connecting rod. The tail rotor variable distance outer sleeve has the beneficial effects of being simple, reasonable in design, convenient to install, small in weight and good in connecting stability.

Description

technical field [0001] The invention relates to a tail rotor accessory of a helicopter, in particular to a tail rotor pitch-variable outer sleeve of a helicopter. Background technique [0002] In the field of unmanned helicopter technology, the adjustment of the helicopter's course and the balance of the aircraft are mainly controlled by changing the blade inclination angle of the tail rotor, and at the same time, it is necessary to ensure that the two blades of the tail rotor have the same inclination angle. When the helicopter is flying, the tail rotor continues to rotate at a high speed. In order to change the blade inclination angle under the above conditions, a tail rotor pitch change sleeve that rotates with the tail shaft and a tail rotor pitch change outer sleeve that does not rotate with the tail rotor at high speed are specially designed. Through Complete with bearing components. The tail rotor pitch change outer sleeve is an intermediate device for the fixed tail...

AI Technical Summary

Problems solved by technology

[0003] At present, due to the imperfect structure of the commonly used tail rotor pitch-variable outer sleeve, it may cause the pitch angle of the two blades of the tail rotor to be different, the blade inclination angle may change when the tail rotor does not move at high speed, or the Tail rotor blade tilt angle change caused by unstable pitch rod connection

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