Review and prospect on the research of rub-impact experiment of rotor systems

Aiming at the rub-impact fault between rotor and stator in rotating machinery,the development about rub-impact experiments was summarized. The rub-impact experimental devices for single point rub-impact,local rubimpact and full annular rub-impact were introduced and typical experimental phenomena caused by these three types of rub-impacts were analyzed. The main rub-impact mode in practical engineering is the local rub-impact. According to different objects,local rub-impact experiments were divided into four types: ①local rub-impact in simple rotor system,② local rub-impact in complicated rotor system,③local rub-impact in rotating blade-casing,④local rub-impact in practical unit. The typical fault features of the three types of rub-impacts were compared and the new research directions about rubimpact experiments were suggested.