空间斯特林发电机热头结构设计及分析

空间斯特林发电机热头在工作中要承受严酷的高温高压的工况,为了保证其长寿命和高效换热等要求,需要对斯特林发电机热头的材料、结构等方面进行分析和优化设计。本文初步介绍了空间斯特林发电机热头结构设计的要求和准则,分析了热头结构设计的难点和关键点及解决途径。采用有限元分析方法,开展了斯特林发电样机热头的温度和压力综合应力分析和热头结构的优化设计。加工完成的热头结构的工作性能满足斯特林发电机样机的要求,初步验证了设计方法和途径的正确性。

Structure Design and Analysis for Heater Head of Space-Borne Stirling Convertor

The running conditions of the space-borne Stirling convertor is rigorous,such as high temperature and

pressure from inner working fluid. To ensure long longevity and high efficiency heat transfer of the heater head, the

materials,structure and so on are need to be analyzed and optimized. In this paper, the structure design principle,analysis,

demands for the heater head of space-borne Stirling convertor are introduced. The difficulty of the heater head

structure is also analyzed in this paper. The heater head optimistic design combined with stress analysis produced by

both temperature and pressure were carried out with the aid of commercial finite element method,the finial heater head

structure design was completed and fabricated,the hardware was integrated on the Stirling engine,the heater head performance

is satisfied with the experiment demands.