航空附件中的滑阀、衬套其绝大部分是直接影响产品性能的关键件,配套间隙是滑阀、衬套的关键特性。统一设计、工艺、制造和检验对滑阀、衬套配套间隙的认识,正确解释配套间隙与尺寸公差、形状公差之间的关系,对提高产品质量是一个非常重要的问题。 Aerospace accessories in the spool valve, the bush is the most direct impact on product performance of the key pieces, supporting the gap is the key features of the spool valve, bushings. It is a very important issue to improve the product quality by unifying the design, technology, manufacturing and testing of the understanding of the clearance between sliding valve and bushing and correctly explaining the relationship between matching clearance, dimensional tolerance and shape tolerance.