초록 ▼

A damping device for damping mechanical vibrations in a small diameter elongated member, such as a waveguide carrying torsional strain waves, includes a damping material contained inside a housing on the waveguide, the damping material is a viscous liquid that does not evaporate or change viscosity

A damping device for damping mechanical vibrations in a small diameter elongated member, such as a waveguide carrying torsional strain waves, includes a damping material contained inside a housing on the waveguide, the damping material is a viscous liquid that does not evaporate or change viscosity over a wide temperature range and which has additives for providing adequate mass density for damping vibrations in such elongated member. The use of a viscous liquid and additives for changing the mass density permits varying the mass density to match impedances and reduce the amplitudes of any reflective waves. The viscous liquid preferably comprises a silicone base oil partially filled with zinc oxide and metal particles to give the characteristic of stable viscosity across a wide range of temperature and provide the necessary attenuation while obtaining good coupling of the damping material to the elongated member.

대표청구항 ▼

A damping device for a vibrating elongated member comprising a housing having an interior chamber, said elongated member comprising a magnetostrictive waveguide having vibrations induced therein, means mounting said housing on said elongated member with the interior chamber open to the elongated mem

A damping device for a vibrating elongated member comprising a housing having an interior chamber, said elongated member comprising a magnetostrictive waveguide having vibrations induced therein, means mounting said housing on said elongated member with the interior chamber open to the elongated member, and a filling of viscous material in said interior chamber having a desired mass density and coupled to the elongated member for absorbing energy of vibrations of said elongated member within said chamber.