轴直径(扭矩)计算公式汇总

1、阀轴设计计算机械设计手册 第3本第3章 轴的强度19-16按许用转应力计算公式实心轴d 35T式中 d-计算剖面处轴的直径（mm）d 3 5*12314.68 T-轴传递的额定转钜（N/mm）20 T=9550000 P/nd 33078.67 -轴的许用转应力（Mpa)见表19.3-2d 14.547478第4章 轴的刚度19-28轴的扭转变形计算584固定值 光轴实心轴=584T式中 -圆轴扭转角的简化计算公式=584 12314.68*200G d4 T-轴传递的额定转钜（N/mm） 8.1*108*14.54 -轴受转钜作用的长度（mm) =200=5842462936 G-材料的切变

2、模量(Mpa) 假设d=14.5 358061*108 对钢 G=8.1*108 (Mpa) =0.00004017 轴的变形许用值合格扭转变形许用值一般轴：=0.50 10/m F F = = A A * * S S F=F=力力 A=A=压压强强 S=S=面面积积例：DN100 = 7853.75 mm2PN16=16 kgf / cm2 =156.8 N / 100 mm2满足此刚度要求的轴直径可由下式求得=1.568 N / mm2d 4 T=7853.75 mm21.568 N=7853.75*1.568 N 138.51mm2d 412314.68=d 4177.829=12314

3、.68 N69.25=584=d3.65扭转变形许用值一般轴：=0.50 10/m轴强度计算d 计计算算剖剖面面处处轴轴的的直直径径 mmmmT 轴轴传传递递的的额额定定转转钜钜 N.mmN.mm公式:d=17.2*(T/)1/3 轴轴的的许许用用转转应应力力MpaMpa轴直径d(mm)材料 T100300500700100013001500170020002500300035004000450050003Cr1313.719.723.326.129.432.133.735.137.139.942.444.746.748.650.32004515.422.226.329.433.136.237

4、.939.541.745.047.850.352.654.756.61401Cr18Ni9Ti16.724.028.531.935.939.241.142.845.248.751.854.557.059.361.4110T:单位N.mT=9550*(P/n) P:单位Kw n: 单位r/minN/mm2轴带键槽轴径(mm)3030-100有一个键槽时的增大值,%75有二个键槽时的增大值,%1510材料 T100300500700100013001500170020002500300035004000450050003Cr1314.621.125.027.931.533.735.436.938.

5、941.944.546.949.051.052.82304516.523.728.131.534.838.039.841.543.847.250.252.855.257.459.51401Cr18Ni9Ti17.825.730.533.537.741.143.145.047.551.254.457.259.862.264.5110有二个键槽时的增大值,%材料 T100300500700100013001500170020002500300035004000450050003Cr1315.722.626.830.033.835.337.038.640.843.946.749.151.453.455.32304517.725.530.233.836.439.841.743.545.949.552.655.357.860