Turbine damping blade full circle vibration characteristics and damping characteristics simulation experimental device

Abstract

The invention discloses a turbine damping blade full circle vibration characteristic and damping characteristic simulation experiment device, which comprises a damping blade simulation and clamping subsystem, a torsional actuation subsystem, and a vibration excitation subsystem. The damping blade simulation and clamping subsystem includes rockers distributed throughout the circle, blade airfoil simulation parts and shrouds; one end of the blade airfoil simulation part is fixed with shrouds, and the other end is vertically connected to the rocker; the torsional actuation subsystem includes the rotating central shaft , the rotating disk and the protruding toggle lever, the protruding toggle lever is used to toggle the rocker when the rotating disk rotates, and then drive the blade airfoil simulation parts to twist, and the contact force between adjacent blade airfoil simulation parts forms a reverse torque It is balanced with the moment of the protruding toggle rod; the vibration excitation subsystem is connected with the shroud, and is used to input vibration excitation to the shroud, so that the whole circle of blade airfoil simulation part connected with the shroud vibrates. The invention can simulate the whole circle vibration characteristics and damping characteristics of the turbine damping blades.

Description

technical field [0001] The invention belongs to the design and research field of structural characteristics of a damping blade of a turbine, and more particularly relates to a simulated experiment device for vibration characteristics and damping characteristics of a turbine damping blade over a circle. Background technique [0002] Turbine blade vibration is a common phenomenon in the operation of modern large turbines, and it is also one of the important causes of blade failure and turbine failure. The longer the turbine blades, the less rigid they are and the more prone to uncontrolled vibrations. [0003] In order to suppress the vibration amplitude of the blade, the tendons or shrouds on the blade are generally designed as some kind of frictional damping structure. When the blade vibrates, the adjacent damping structure consumes the vibration energy through extrusion and friction, thereby reducing or even eliminating the vibration amplitude. value. [0004] Blades with...

AI Technical Summary

Problems solved by technology

[0007] In view of the defects in the above existing technologies, the present invention provides a simulation experiment device for the vibration characteristics and damping characteristics of the turbine damping blades, which can solve the problems in the prior art that it is difficult to simulate the vibration characteristics and damping characteristics of the turbine damping blades. , high experimental cost, and complicated operation process

Images