FENCE FOR TEXTILE MACHINE SPINDLES Russian patent published in 2017 - IPC D01H1/16 

FIELD: textile, paper.

SUBSTANCE: fence for textile machine spindles comprises a casing mounted on the spindle rail of the machine at the level of its spindles, along their row, with vibration and sound absorbing layers attached to its inner surface, and from the outside - slats attached thereto in cantilever along the row of the machine spindles, with a vibration-absorbing layer arranged on their bottom surface, wherein the spindles on the spindle rail of the machine are mounted by means of elastic elastomer gaskets, the ratio of their total stiffness to the flexural rigidity of the spindle rail being in the optimum range of values: 0.01…0.1, and the thickness of the vibration-absorbing layer arranged on the slats is 2…4 times higher than the thickness of the slats; the vibration-absorbing material layer is represented by an elastic vibration-absorbing sheet material with a coefficient of internal loss not less than 0.2, or a composite material, or a plastic compound; the sound-absorbing casing material is represented by elements of basalt-based mineral wool, or mineral wool, or basalt wool, or glass wool lined with glass felt, or a foamed polymer, e.g. polyethylene or polypropylene, wherein a sound-absorbing element across its entire surface is lined with an acoustically transparent material, e.g. a fiberglass or a polymer, characterized in that the fence of the spindles comprise a sound-absorbing device made in the form of a stiff wall and a perforated wall, between which a multilayer sound-absorbing element is arranged, made in the form of five layers, two of which, adjacent to the walls, are sound-absorbing layers of materials with different densities, and three central layers are combined, wherein the axial layer is made sound-absorbing, and two symmetrically arranged layers adjacent thereto are made of a sound-reflecting material of a complex profile, consisting of evenly spaced hollow tetrahedra, allowing to reflect sound waves falling in all directions, each of the perforated walls has the following perforation parameters: the diameter of the holes 3÷7 mm, the perforation percentage 10%÷15%. As per shape, the holes can be made as holes of a round, triangular, square, rectangular, or diamond profile. In case of non-circular holes, the maximum diameter of a circle inscribed in a polygon should be considered as the nominal diameter; boards of basalt-based mineral wool, of mineral wool, or basalt wool, or glass wool lined with glass felt, are used as a sound-absorbing material. The sound-absorbing element over its entire surface is lined with an acoustically transparent material, e.g. a fiberglass or a polymer.

EFFECT: increased noise reduction efficiency.

3 dwg