Multi-span rotor test bench with adjustable shaft sections and supports

Abstract

The invention discloses a multi-span rotor test bench with adjustable shaft sections and supports. The bench comprises a drive motor, a drive shaft module, a sliding groove guide positioning module, amovable support module and a self-centering disc rotor module which are arranged on a base; the drive shaft module includes a plurality of drive shafts and a coupling, and the sliding groove guide positioning module includes a sliding block assembly sliding along a linear guide rail; the movable support module includes a self-centering sleeve in corresponding connection with the sliding block assembly through a support assembly, and the self-centering sleeve achieves locking fixing with the drive shafts by a locking assembly; the self-centering disc rotor module includes a counterweight discwhich is locked fixedly with the drive shafts by a locking assembly. The bench has the advantages of simple structure, convenient operation and reliable test, can effectively ensure high coaxiality between the shaft sections, carries out experimental researches of variable support position, variable shaft section length, variable shaft section outer diameter and the like, provides a practical andefficient rotor test system and greatly accelerates the research process.

Description

technical field [0001] The invention relates to a multi-span rotor test bench with adjustable shaft sections and supports, belonging to the technical field of rotor dynamics tests. Background technique [0002] Helicopter transmission system is a multi-stage, branched, gear meshing complex rotor system with non-parallel shafts. Among them, the tail transmission system is an important subsystem of the helicopter transmission system. Its function is to transmit power from the engine to the tail rotor through the transmission of torque and speed, balance the anti-torque torque generated by the rotor and realize the heading control of the helicopter. If there is a flaw in the design of the tail drive system, the tail drive shaft will cause strong vibration during high-speed rotation, which will break and damage the parts, resulting in the failure of the tail rotor control, which seriously threatens flight safety. During the flight of the helicopter, in addition to the heavy loa...

AI Technical Summary

Problems solved by technology

[0004] Existing multi-span rotor test benches generally have a limited adjustment range between spans, and the shaft length and shaft diameter cannot be changed. During the test process, adjusting the bearing position or replacing other accessories will cause inconsistent alignment and dismantling the bearing is time-consuming and laborious.

Chinese patent (CN 108007692A) proposes a split-type support structure test structure for a turboshaft engine double-rotor test bench, which effectively avoids dismantling other bearing seats or joints when changing the parameters of a certain bearing seat during the test process. However, if only the position of the bearing seat is changed, the bearing still needs to be disassembled. If you want to change the parameters of the shaft section, especially the shaft diameter, you need to change the structural parameters of the relevant parts of the test bench.

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