(Engineering Research Center of Chemical Technology Safety Ministry of Education,Beijing University of Chemical Technology, Beijing 100029, China)


Abstract: Aiming at the problem of rigid modal in dynamic balance of a rotor with elastic support, the dynamic balance mechanism of the doublesided influence coefficient method and the forward orthogonal method of the mode N+2 plane were studied, in addition, the vibration influence laws of the first and second critical rotational speeds of the rotor after lowspeed balancing were summarized, and the operation method of rigid modal dynamic balancing of an elasticsupported rotor was put forward. DyRoBeS software was used to establish the model of elasticmultidisk rotor system for the simulation calculation of rotor dynamic modes. Meanwhile, a squirrel cage elastic support multidisk rotor test bench was built to carry out the vibration control effect experiment at the critical point of two dynamic balance methods. The results indicate that when dynamic balance of elastic support rotor system with still rigid body mode for higher order vibration modes, the influence coefficient method can effectively reduce the vibration amplitude at the first and second critical speeds after lowspeed dynamic balancing, and modal forward orthogonal balance method can effectively reduce the vibration at the first critical speed without affecting the vibration at the second critical speed after dynamic balance at the first critical speed.
Key words: doublesided influence coefficient method; modal dynamic balance; elastic support