The paper provided an overview of computer aided tolerance design and described the research methods of tolerance design. An example of a displacement pump was employed to analyze the angle and linear tolerance. With the application of tolerance optimization design of CAD assemblies combined with tolerance annotation and tolerance accumulation validation, the product design can be optimized and the cost can be reduced effectively.
The temperature field of a 600MW supercritical boiler water-wall in burner zone is calculated based on finite-element method. Bilinear quadrilateral is used in meshing. Flux rate of the fire-facing side is calculated in section. The work condition of working medium is determined based on inlet medium and outlet medium. And heat transfer coefficient is defined. Temperature field in different working conditions is calculated to analyse the safety of the boiler.
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