CHINA MINE ENGINEERING

Mechanical arms of mining machinery are members with flexible structures that usually have weak rigidity and light damping, so they are liable to unwanted oscillation of low frequency and small amplitude under external interference. During mining, the mechanical arm is vulnerable to forced oscillation by ambient disturbance that is difficult to eliminate through the arm’s structure, resulting in strong impact on mining accuracy and work stability. Magnetic fluid dampers not only are sensitive to oscillation without need for external excitation, but also possess properties of small size, light weight and reliable work performance. They are irreplaceable in damping against oscillation of low frequency and small amplitude for long, straight, flexible members.