Research On New Transmission Mechanism Of Helicopter Main Reducer

With the application of the helicopter is more and more widely, people has higherrequirement on helicopter performance, especially to improve the transmissionefficiency of a helicopter main gear reducer, etc.It gets more and more attention ofpeople. Not only on the study of the new type of gear reducer, also in the pursuit ofmore perfect way of gear transmission, in order to improve the performance of thehelicopter.Micro-segment gear has high contact strength and bending strength, and hightransmission efficiency, low noise, it is applicable for high speed condition etc, andhas good application value in the aviation reducer wide attention by academic andengineering. In translation, with large transmission ratio, gear transmission waysimple and compact structure, the advantages of small volume, has beensuccessfully applied on the three-ring gear reducer.In this thesis, the micro-segment gear transmission and translation within thetransmission way together, a new type helicopter main reducer transmissionmechanism is put forward. Micro-segment gear which has been proved bynon-contact testing method of static strength is superior to the common involute gear,and using the orthogonal experiment method is deduced from a micro-segmentbending stress formula of gear. Around translational gear transmission mechanism ofthe interference conditions within the micro-segment, the optimization mathematicalmodel was constructed, and optimize a set of instance parameter, using the set ofinstance parameter, using method of the secondary development of Pro/E to create a3D parametric model of gear transmission mechanism, and the transmissionmechanism of the3D model has carried on the simulation analysis, verify therationality of the translation within the micro-segment gear transmission mechanismand feasibility.