【摘要】 <正> 一、引言 工程上常用的热工仪表,一般是应用机械方法对某种物理量的测量,指示或者进而用以调节和控制,它的主要原理是依赖于其中弹性元件的变形,即由于压力参数的改变,引起元件产生线性关系的位移,从而带动指示或调节机构。因此弹性元件的质量和性能实际上成为仪表制造的关键,它直接影响仪表的精密度和灵敏度。固然材料的高度均匀性更多还原

【Abstract】 The elastic behaviour of an oval Bourdon tube is studied. Vital improvements are made on the original Feodosev theory for a thick-walled oval Bourdon tube. A new theory thus obtained is applicable to all oval Bourdon tubes with various physical proportions. Since the prevailing theories provide no means to evaluate their appropriate ranges of application, it appears that the present theory is extremely desirable for the designers.As illustrations, a few numerical computations are given. The discrepancies between the test results and those predicted by the present theory are found to be within 20 %. Moreover, the new theory agrees closely with Feodosev’s thin-wall theory for relatively thin tubes, while it approaches Feodosev’s thick-wall theory for thick tubes as expected.Furthermore, the present theory is also applicable to other Bourdon tubes with dumbbell-like cross sections, the theory for which has not been available as yet.更多还原