Damper for damping vibrations with a damping body promoting formation of foam
A damper includes at least one substantially longitudinal damping body with two end surfaces and one substantially longitudinal surface between. The damping body is placed in a substantially longitudinal cavity, which includes a cavity surface, with a damping fluid that includes a liquid and a gas. At least one of the cavity surface, end surfaces or longitudinal surface is broken, and the damping body can pulsate in the cavity when the damper is in operation.
1. A method of damping vibrations in a machine tool, comprising:
placing a substantially longitudinal and cylindrical damping body in a cavity of the machine tool, the damping body having an axial hole that extends through the entire longitudinal length of the damping body, the cavity being filled with a damping fluid comprising liquid and gas;
rotating the machine tool such that the position of the damping body within the cavity is continuously altered;
mixing the liquid and gas using the continuously altered damping body to form foam in the cavity; and
damping vibrations in the machine tool using the damping body and foam.
2. The method of claim 1 , further comprising forcing liquid out of the axial hole while forcing gas into the axial hole as the damping body pulsates within the cavity.
3. The method of claim 2 , further comprising forcing gas into the axial hole from opposite ends of the damping body to ease the formation of gas pockets in the liquid.
4. The method of claim 3 , wherein the gas comprises air and the liquid comprises oil.