CLASSIFICATION AND SYNTHESIS OF PLANETARY GEAR TRAINS

摘要

Application of topological graphs to analyze and synthesize planetary gear trains (PGTs) is an effective approach in searching for innovative planetary trains. A new graph representation and stratification standard are introduced firstly. Then three topological graphs of basic structure and four fundamental units (FUs) of PGTs are established as the basis of synthesis theory. Next the topological characteristics, combination system and evolutionary type of different PGTs are summarized. And the criterion and method of isomorphic determination are presented by an example. According to four types of FUs, a formula of the quantity of combined PGTs is built up. Finally a new system of classification and synthesis for PGTs is put forward according to the feature of loops in topological graphs.