Experimental study on absorption of blade vibration of honeycomb seal and shunt injection  

作　　者：张强 

机构地区：[1]Diagnosis and Self-recovery Research Center,Beijing University of Chemical Technology,Beijing 100029,P.R.China

出　　处：《High Technology Letters》2008年第4期394-398,共5页高技术通讯（英文版）

基　　金：the National Natural Science Foundation of China(No.50375013,50675013);the National High Technology Research and Development Progamme of China(No.2007AA04Z422)

摘　　要：Honeycomb seals and shunt injection have been proposed to weaken the blade vibration.Honeycombseals,as well as,smooth seals were tested with different seals' clearances and shrouded blades.Theshunt injection was sprayed to the blade tip clearance in the reverse direction of the main flow.Experi-mental results showed that both honeycomb seals and shunt injection had the damping effect for blade vi-bration,and the blade vibration magnitude could be reduced by more than 25 % and 17 %,respectively.When the two methods were adopted synchronously,more than 1/3 of the blade vibration could be re-duced.Consequently,adopting honeycomb seal and superinducing proper shunt injection are two usefulways to minimize vibration of the blade from the viewpoints of avoiding blade rupture and improving therotor stability.Honeycomb seals and shunt injection have been proposed to weaken the blade vibration. Honeycomb seals, as well as, smooth seals were tested with different seals＇ clearances and shrouded blades. The shunt injection was sprayed to the blade tip clearance in the reverse direction of the main flow. Experimental results showed that both honeycomb seals and shunt injection had the damping effect for blade vibration, and the blade vibration magnitude could be reduced by more than 25 % and 17 %, respectively. When the two methods were adopted synchronously, more than 1/3 of the blade vibration could be reduced. Consequently, adopting honeycomb seal and superinducing proper shunt injection are two useful ways to minimize vibration of the blade from the viewpoints of avoiding blade rupture and improving the rotor stability.

关 键 词：steam turbines honeycomb seals shunt injection absorption of vibration 

分 类 号：TH136[机械工程—机械制造及自动化]