FIELD: machine building.
SUBSTANCE: vibration damper is integrated in the base of mast and contains fixed embedded element rigidly mounted in mast and supported by spring. Spring is strutted by movable embedded element inside mast, the element is located on ball. Ball is installed on cup with concave spherical surface provided with limit ring preventing ball overrunning cups boundaries.
EFFECT: damping axial and radial vibration oscillations and mast centring, preventing occurrence of standing waves.
2 cl, 8 dwg
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