FRICTION TYPE DAMPER Russian patent published in 2018 - IPC F16F9/30 

FIELD: machine building.

SUBSTANCE: invention relates to the vibration protection means. Friction type damper comprises body and the piston placed therein. Body is made in the form of the cylinder with bottom, in which a piston is located in the form of a cup with parallel to each other and coaxial to the body upper and a lower collars, which are disposed relative to the body inner surface with a gap. Between the collars a friction material is located. Spring located between the piston and the body bottom rests against the piston lower surface. Cavity between the piston and the body bottom, in which the spring is located is filled with a friction material with a higher friction coefficient. Piston upper collar upper surface rests against the elastic ring connected to the locking member made, for example, in the form of a locking ring fixed in the groove of the body cylinder inner surface. Through the resilient ring the locking element contacts the piston upper collar upper surface, holding it in its original state. As the located between the piston collars friction material, a sintered friction material based on copper containing zinc, iron, lead, graphite, vermiculite, copper, chromium, antimony and silicon is used.

EFFECT: increase in the damping efficiency in resonance mode.

1 cl, 1 dwg