对机器传动件的动态功率和扭矩测定时,经常需要在旋转的零部件上进行测量。测试时同样要在测点预定方位上贴好应变片,并引出导线。但是应变片和导线将随同这个旋转零部件一起转动,而测试仪器则是固定不动的,因此需要一种特殊的装置把应变信号由旋转的应变片和导线引到静止的导线和仪器上,这种装置就是集流环。集流环分拉线式、碳刷式、感应式和水银集流环四种。由于碳刷式集流环具有结构简单、可靠耐用和精度较高等优点而被广泛采用。 When measuring the dynamic power and torque of the transmission parts of the machine, it is often necessary to make measurements on rotating parts. Test the same place in the measuring point affixed to the good strain gauge, and leads wire. However, the strain gauge and the wire will rotate with the rotating part, and the test apparatus will be stationary, so a special device is needed to direct the strain signal from the rotating strain gauge and wire to the stationary wire and instrument, This device is a slip ring. Centralized chain pull-line, brush type, inductive and mercury current collector ring four. As the carbon brush-type current collector has the advantages of simple structure, reliable durability and high accuracy, which are widely used.