Abstract: Based on reliability optimal design theory and traditional design information, the probability model of the reliability optimal design is established with the objective of minimum reducer volume. The enumeration of meshes is applied to find the optimum and the relevant computer programs using C language and FoxBASE+ are developed. The calculating results show that the reliability optimal design gives better weight quota of HZT planetary reducer of engineering machine than those calculated by conventional optimal design method and can predicate the reliability value of the product in operation.

Key words: Planetary reducer, Probability model, Reliability optimal design