在设计弹簧管压力表时,通常采用仪表的精确度、测量范围以及外形尺寸作为原始数据。尽管有现存的计算理论,一般情况下,弹簧管参数的选择还是凭经验进行。在同时按几个压力计算的压力表中,使用相同的传动机构和具有不同壁厚的、横截面相同的弹簧管。在这种情况下,难以保证测量小压力(0.1至1兆帕)的准确度,因为在传动机构中摩擦力的误差随着薄壁弹簧拉力的减小而增大。6至10兆帕及以上 In the design of the spring tube pressure gauge, usually the accuracy of the instrument, measuring range and dimensions as the original data. Despite the existing computational theory, under normal circumstances, the choice of spring tube parameters or by experience. In the pressure gauges, which are calculated at several pressures at the same time, the same gear train and spring tubes with the same wall thickness and the same cross-section are used. In this case, it is difficult to guarantee the accuracy of measuring small pressures (0.1 to 1 MPa) because the error of friction in the transmission increases with the reduction of the tension of the thin-walled spring. 6 to 10 MPa and above