Dynamic characteristics of special-shaped composite seal device of rotary air preheater
The leakage of rotary air preheater(RAPH)affects the economic benefit of the power plants.The special-shaped com-posite seal device can reduce the leakage of RAPH.A non-linear dynamic finite element model of the seal-fan-shaped plate(FSP)interaction was established based on the elastoplastic and theoretical mechanics using numerical software,and the dynamic response characteristics of the special-shaped composite seal were studied.The results showed that the combined deformation of"folding"and"tipping"of the special-shaped composite seal increases its elasticity and reliability;during the dynamic interac-tion between the seal and the FSP,the seal will vibrate,so it will not keep contact with the FSP at all times,and reasonable in-crease of the stiffness of the seal is conducive to vibration reduction and leakage reduction;the friction power consumption of the seal is related to the speed of the seal relative to the FSP.The research results provide some guidance for the popularization and application in power plants of special-shaped composite seal devices.
rotary air preheaterleakage rateseal devicedynamics
万方数据
维普
