Simulation Study on the Influence of a U-shaped Damping Pad on the Vibration of the Coal Winning Machine's Long Screw
ZHENG Zhuping
LÜ Xiao
WEI Hongqing
Abstract：When the coal winning machine is working,it usually cuts the gangue ore.At this time,the long screw of the coal winning machine is subjected to significant low-frequency vibration,which can easily cause resonance and damage to the machine body.A U-shaped vibration damping pad installed in the slot of a long screw was proposed,which wraps around the half circumference of the long screw to reduce the occurrence of resonance phenomenon.To verify the optimization scheme proposed above,a long screw vibration model was established.And the finite element method was used to analyze and compare the effects of the presence or absence of U-shaped damping pads and the installation position of U-shaped damping pads on the vibration of long screws.It was found that installing U-shaped damping pads increased the low order natural frequency of long screws by about 200 Hz and the harmonic response frequency by about 90 Hz,avoiding resonance.And when three U-shaped damping pads were installed,the first-order natural frequency of the long screw reaches up to 476 Hz,which is much higher than the external excitation frequency of the long screw structure,significantly avoiding the resonance point.
Keywords：coal winning machinelong screwvibrationU-shaped anti-vibration padharmonic response
Publication Date：2025-02-28
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 83-85,90 )