ACOUSTIC SCREEN FOR SPINNING MACHINES Russian patent published in 2014 - IPC D01H13/14 

FIELD: machine building.

SUBSTANCE: acoustic screen for spinning machines comprises a cover, on which a layer of a sound-absorbing element is fixed, tightly closing a unit of an aerodynamic torsion device together with a source product and a roller of a drawing instrument with a driving belt. According to the invention, the sound-absorbing element is made in the form of a smooth and a perforated walls, between which there is a sound-absorbing material, arranged in two layers, one of which, a more rigid one, is made as solid and shaped, and the other one, soft one, is made as interrupted and arranged in the focus of sound-absorbing surfaces of the first layer. The solid shaped layer of the sound-absorbing material is made from a material, in which the coefficient of sound reflection is more than the coefficient of sound absorption compared to the coefficient of sound absorption, besides, profiles are formed by spherical surfaces, connected to each other so that as a whole each of profiles forms a solid dome-shaped profile, which focuses the reflected sound to one and the same soft sound absorber, which is arranged in the focus of the solid shaped layer. Sound absorbers are made in the form of revolution bodies, for instance, in the form of balls, ellipsoids of rotation, and are fixed with the help of rods, parallel to a perforated wall and rigidly connected to the smooth wall by means of vertical joints.

EFFECT: higher efficiency of sound-suppressing.

3 dwg