ZHENG Dong-ya, DING Shui-ting, DU Fa-rong, et al. Analysis and experimental verification of structure-thermal running stability for micro turbojet engine rotor[J]. 2010, 25(6).
ZHENG Dong-ya, DING Shui-ting, DU Fa-rong, et al. Analysis and experimental verification of structure-thermal running stability for micro turbojet engine rotor[J]. 2010, 25(6).DOI:
For the high speed rotor of a type of micro turbojet engine
thermal running stability was analyzed firstly
then high-precision dynamic balancing and overall dynamic balance checking in thermal state
as well as the damping structure and thermal insulation
were experimentally verified.The results show that
when the rotor imbalance is reduced
the rotor is kept steady with proper external damping.The average temperature of measuring points is reduced with the installation of heat shield for back bearing
which reduces the heat input for rotor support and its effect on the bearing stiffness and damping.The methods consequently improve the structure-thermal running stability of rotor
and enhance the stability and safety of the whole engine.