Helicopter tail shaft installing structure

Abstract

The invention belongs to the field of helicopter tail shafts, and particularly relates to a helicopter tail shaft installing structure. A helicopter tail shaft is in a segmented type, and a supportingbase (1) is arranged at the connected position of two segments of the shaft; the two segments of the shaft are connected by a spline, and a combination bearing (2) is arranged in the supporting base(1); the combined portion of the two segments of the shaft is installed in the combination bearing (2); the combination bearing comprises a first bearing body and an outer ring (21); the first bearingbody comprises a spherical outer ring (22), a holder (25), a rolling ball (26) and an inner ring (27); the rolling ball (26) is fixed between the spherical outer ring (22) and the inner ring (27) through the holder (25), and rotating in the circumferential direction is guaranteed; the first bearing body is located in the outer ring (21); the spherical outer ring (22) and the outer ring (21) are in spherical face cooperation, and a combination bearing body is formed; and the first bearing body and the outer ring (21) can relatively swing. A helicopter tail shaft compensating structure is provided.

Description

technical field [0001] The invention belongs to the field of helicopter tail shafts, in particular to a helicopter tail shaft installation structure. Background technique [0002] The tail shaft of the helicopter is located between the main reducer, the intermediate reducer and the tail reducer, and its function is to transmit the power output from the tail of the main reducer to the tail reducer to drive the tail rotor. Due to the large distance between the main reducer and the tail rotor, it is a more reasonable combination method to divide the tail shaft into several short shafts, and the shafts are connected by bearing fulcrums, see figure 1 . In the process of rotation and torsion transmission of the tail shaft, vibration is inevitable. When the speed reaches a critical value, the vibration is the largest, and the vibration will cause the axial movement and radial deflection of the shaft, which will cause impact on the bearing. If the bearing cannot Deviating along wi...

AI Technical Summary

Problems solved by technology

In the process of rotation and torsion transmission of the tail shaft, vibration is inevitable. When the speed reaches a critical value, the vibration is the largest, and the vibration will cause the axial movement and radial deflection of the shaft, which will cause impact on the bearing. If the bearing cannot The deflection along with the shaft, making this deflection "soft landing" will cause greater wear of the bearing, affect the normal use of the bearing, and at the same time damage the shaft itself

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