机械效率

滑轮

${\displaystyle ={\frac {G\cdot h}{F\cdot s}}}$[1]
${\displaystyle ={\frac {G\cdot h}{F\cdot nh}}}$
${\displaystyle ={\frac {G}{nF}}}$[b]

常见效率

${\displaystyle 16\%-24\%}$ ${\displaystyle 40\%-50\%}$ ${\displaystyle 22\%-27\%}$ ${\displaystyle 28\%-30\%}$ ${\displaystyle 60\%-80\%}$ ${\displaystyle 50\%-70\%}$ ${\displaystyle 80-95\%}$ ${\displaystyle 49\%-52\%}$

参考资料

注释

1. ^ ${\displaystyle A_{0}}$表示输出功,${\displaystyle A_{r}}$表示输入功。
2. ^ 不计绳重和摩擦，计动滑轮重时公式为${\displaystyle \eta ={\frac {G}{G+G'}}}$,其中${\displaystyle G}$为物重，${\displaystyle G'}$为动滑轮重。

资料

1. ^ 1.0 1.1 机械效率（PPT）. : 7. 引用错误：带有name属性“.E6.9C.BA.E6.A2.B0.E6.95.88.E7.8E.87.EF.BC.88PPT.EF.BC.89”的<ref>标签用不同内容定义了多次
2. ^ Oxford English Dictionary. Oxford University Press. 1989. A wheel with a groove round its rim, a sheave. A wheel or drum fixed on a shaft and turned by a belt, cable, etc.,
3. ^ 3.0 3.1 机械效率
4. ^ Anderson, William Ballantyne. Physics for Technical Students: Mechanics and Heat. New York, USA: McGraw Hill. 1914: 112–122.
5. ^ Moon, Francis; Moon, F. C., The machines of Leonardo da Vinci and Franz Reuleaux:kinematics of machines from the Renaissance to the 20th century illustrated, annotated, Springer: pp. 28, 2007, ISBN 9781402055980