叶轮是流体机械中的要害部件，，普遍应用于泵、风机、压缩机和涡轮等装备中。。

它由装置在旋转轴上的多个叶片组成，，旨在通过旋转来转达机械能给流体或从流体获取机械能。。

当叶轮旋转时，，它能够增添经由的气体或液体的速率和压力，，或者在涡轮的情形下，，使用流体的能量来驱念头械运动。。

The impeller is a critical component in fluid machinery, widely utilized in devices such as pumps, fans, compressors, and turbines. 

It comprises multiple blades mounted on a rotating shaft, designed to transfer mechanical energy to a fluid or extract energy from it through rotation. 

When the impeller rotates, it can increase the speed and pressure of the passing gas or liquid, or in the case of a turbine, use the energy of the fluid to drive mechanical motion.