在矿山机械设计计算中,常常会遇到具有切向键槽轴的抗扭及抗弯断面模数的计算问题,提升机主轴就是一例。以往,由于缺乏现成的计算公式,设计时多借用双平键对开槽轴的断面模数公式。自然,这样给计算带来了很大的误差。在后面的计算中,我们将看到其相对误差超过了10％。显然,这是工程上所不允许的。为此,我们导出了下面的精确计算公式和数表。 In the mining machinery design and calculation, often encountered with the tangential keyway shaft torsional and bending section modulus calculation problem, the elevator shaft is an example. In the past, due to the lack of ready-made calculation formula, the design time to borrow double flat keys on the slotted shaft section modulus formula. Naturally, this brings a big error to calculation. In later calculations, we will see that its relative error exceeds 10%. Obviously, this is not allowed by engineering. To this end, we derived the following exact calculation formula and number table.