Click for new scientific resources and news about Corona[COVID-19]

Paper Information

Journal:   MODARES MECHANICAL ENGINEERING   FEBRUARY 2017 , Volume 16 , Number 11 ; Page(s) 135 To 142.
 
Paper: 

INVESTIGATING THE DYNAMIC BEHAVIOR OF BALL-SPRING AUTOMATIC BALANCER IN PRESENCE OF GYROSCOPIC EFFECT

 
 
Author(s):  REZAEI MOUSA*, ETTEFAGH MIR MOHAMMAD, FATHI REZA
 
* DEPARTMENT OF MECHANICAL ENGINEERING, UNIVERSITY OF TABRIZ, TABRIZ, IRAN
 
Abstract: 

One of the new methods for reducing the vibrations of rotors with variable imbalance is implementing automatic ball balancer (ABB). Although the ABB has numerous advantages, it has one major deficiency; increasing the rotor vibration amplitude at transient state that limits the use of this type of balancers. In the previous studies for diminishing the mentioned deficiency, a new type of ball balancer which is called the ball-spring ABB is introduced, and the dynamic behavior of Jeffcott rotor equipped with the ball-spring ABB is investigated. In the Jeffcott rotor model the gyroscopic effect is not considered, however, in practice and in many applications, due to asymmetry which comes from the offset of the rotor from the shaft mid-span, the gyroscopic effect is generated. In such conditions, the results of Jeffcott model are not reliable and dynamic behavior of the ball-spring ABB should be investigated in the presence of gyroscopic effect. In this paper by considering the asymmetry in the rotor-shaft system and taking into account the gyroscopic effect, the equations of motion of a rotor equipped with the ball-spring ABB are derived. The time responses of the system are computed and based on the Lyapanov first method, the stable regions are extracted. The results show that not only does the gyroscopic effect not affect on the performance of the ball-spring ABB, but also the magnitude of the Eulerian angles of the rotor equipped with the ball-spring ABB is less than those the rotor equipped with the traditional one.

 
Keyword(s): AUTOMATIC BALL-SPRING BALANCER, GYROSCOPIC EFFECT, STABLE REGION, TRANSIENT STATE
 
References: 
  • ندارد
 
  Persian Abstract Yearly Visit 57
 
Latest on Blog
Enter SID Blog