Vibration Control Of Lapped Rotor Based On Integrated Squeeze Film Damper And Damping Vibration Reduction Of Pipeline

In this paper,the lap structure and the bolt lap structure existing in the engine shafting are studied experimentally.By comparing with the non-lap structure shafting,the influence of the three structures on the vibration response of the shafting is explored.Compared with the non-lap structure,the average vibration reduction of the lap structure is 45.90%,and the average" vibration reduction of the bolt lap structure is 30.75%.The effect of bolt number on vibration amplitude and the effect of different lap joints on vibration is studied.The effect of changing the number of bolts on vibration is not always positively correlated.When the number of bolts is large enough,increasing the number of bolts will increase the positive pressure of the lap surface.When the positive pressure is large enough,the lap surface will not slip during rotation,and the stiffness of the system will increase and the vibration amplitude will decrease.With the decrease of the number of bolts,the positive pressure of the lap contact surface decreases and slippage occurs.There is a damping term in the system,but the overall stiffness of the system also decreases,and the vibration amplitude may increase or decrease.The maximum vibration amplitude response increases after increasing the gap of the lap structure.The reasons for this phenomenon are as follows:firstly,the increase of lap rotor clearance will reduce the contact between the two lap surfaces,reduce the friction contact time,reduce the friction energy consumption,and increase the vibration amplitude.Secondly,with the increase of lap gap,the stiffness of the rotor system decreases and the amplitude increases during rotation.Then,the support of the lap structure turntable shafting system is changed.After replacing the original rigid support with elastic support and elastic damping support,the maximum vibration amplitude response is better weakened than that of the non-lap structure rotor,and the elastic damping support has the best vibration reduction effect.Combined with the vibration problem of the outlet pipeline of the reduced pressure furnace,the damping technology is applied to the outlet pipeline of the reduced pressure furnace.Calculate the pipeline modes,draw drawings based on the site pipeline position of the reduced pressure furnace,and install viscous damper at the vibration point of the vibration pipeline.The maximum amplitude of the pipeline is reduced by more than 92%,which ensures the safe operation of the reduced pressure furnace pipeline.