RU2311501C2 - Housing for spindles of textile machine - Google Patents

Abstract

FIELD: textile engineering.

SUBSTANCE: housing has guard mounted on spindle bar of textile machine, at the level of spindles, along row of spindles and provided with vertical detachable cover and vibration-absorbing layer fixed to guard inner surface and sound-absorbing layer. Guard consists of upper part and lower part, each of said parts having body made from sheet angular members with apex angle of 90 deg. Sheet members are rigidly attached to spindle bar upper and lower parts. Thickness of vibration-absorbing layer fixed to plates exceeds thickness of body plates and cover by 2-4 times. Housing parts are fixed on textile machine by means of rubber layers having total rigidity lower than that of vibration-isolating spindle hanger. Vibration-absorbing material is elastic vibration-absorbing sheet material having intrinsic loss coefficient of at least 0.2, or composite material, or plasticized rubber. Sound-absorbing material of guard has members made from basalt-based mineral wool, or mineral wool, or basalt-based wool, or glass wool lined with glass felt, or foamed polymer such as polyethylene or polypropylene. Sound-absorbing member is lined with acoustically transparent material such as glass cloth or polymer applied onto its entire surface. Sound-absorbing material for guard may be made from soft foamed porous sound-absorbing material such as polyurethane foam, or polyethylene foam, or rigid porous sound-absorbing material such as foam aluminum. Sound-absorbing material for guard may be made in the form of crumbs of solid vibration-damping materials such as elastomer, polyurethane or plasticized rubber, said crumbs being placed within enclosure of sound-conducting material. Crumb fraction has sizes ranging between 0.3 mm and 2.5 mm.

EFFECT: increased efficiency in reducing of noise created by rotating spindles.

5 cl, 1 dwg

Description

The invention relates to the textile industry and relates to noise attenuation spindles of textile machines.

Known fencing spindles of a textile machine, containing mounted on the spindle bar of the machine at the level of its spindles along their row of fencing with vibration-absorbing layers fixed to its inner surface (SU 1388484 A1, 04/15/1988).

A disadvantage of the known device is the relatively low noise reduction efficiency.

The closest analogue of the claimed invention is a casing of spindles of a textile machine containing a guard mounted on the spindle bar of the machine at the level of its spindles along their row with a vertically arranged removable cover and with a vibration-absorbing layer and a sound-absorbing layer fixed on its inner surface (KORITYSKY Ya.I. et al. Vibration and noise in textile and light industry, Moscow, Light industry, 1974, p.150-151, fig. 92, p. 162).

In this casing, the aforementioned drawback is not eliminated.

The objective of the invention is to provide a casing for the spindles of a textile machine, providing a technical result, consisting in increasing the efficiency of reducing the noise created on the machine by rotating spindles.

This technical result in the casing of the spindles of a textile machine, comprising a guard with a vertically arranged removable cover and a vibration-absorbing layer and a sound-absorbing layer fixed to its spindle along the row of spindles of the machine, is achieved by the fact that the guard is made of the upper and the lower parts, each of which consists of a body made of sheet corners with an angle at the apex of 90 °, rigidly attached to the spindle beam in its upper and lower parts, with the thickness of the vibration-absorbing layer placed on the plates is 2-4 times greater than the thickness of the plates of the body and cover, and the casing elements are installed on the machine by means of vibration-isolating rubber gaskets, the total rigidity of which is lower than the rigidity of the vibration-isolating suspension of the spindle.

As the material of the vibration-absorbing layer, an elastic sheet of vibration-absorbing material with an internal loss coefficient of at least 0.2, or a composite material, or plastic compound is used.

Elements of mineral wool based on basalt or mineral wool, or basalt wool, or glass wool with glass fiber lining, or foamed polymer, for example polyethylene or polypropylene, are used as sound-absorbing material of the enclosure, and the sound-absorbing element is lined with acoustically transparent material, for example fiberglass, over its entire surface or polymer.

The sound-absorbing material of the enclosure is made of soft foamed porous sound-absorbing material, for example, foamed polyurethane foam or polyethylene foam, or of rigid porous sound-absorbing material, for example foam aluminum.

The sound-absorbing material of the fence can be made in the form of crumbs from solid vibration-damping materials, for example, elastomer, polyurethane, or plastic compound, placed in a shell of sound-transparent material, and the size of the fractions of the crumb lies in the optimal range of values: 0.3 ÷ 2.5 mm.

The drawing shows a casing of spindles of a textile machine.

The casing of the spindles of the textile machine comprises a guard mounted on the spindle bar 1 of the machine at the level of its spindles 2, rotating from the belt 3, along with a row of vibration-absorbing layers fixed to its inner surface 4. The guard is made of upper and lower parts, each of which consists of a body made of sheet corners with an angle at the apex of 90 °, rigidly fixed to the spindle beam in its upper and lower parts, and a vertically located removable cover 5. All elements of the casing are installed on the machine in the middle Twomey rubber isolators 6, the total stiffness is lower than stiffness antivibration suspension spindle 2. The thickness placed on plates of vibration absorption layer (not shown) in 2 ÷ 4 times greater than the thickness of plates and the housing cover. As the material of the vibration-absorbing layer, an elastic sheet of vibration-absorbing material with an internal loss coefficient of at least 0.2, or a composite material, or a plastic compound of the type "Agate", "Anti-Vibrate", "Shvim" is used. As sound-absorbing material of the fence, elements are used from rockwoot basalt mineral wool or URSA mineral wool or P-75 basalt wool or glass wool lined with glass wool or foamed polymer, such as polyethylene or polypropylene, the sound-absorbing element is lined with an acoustically transparent material over its entire surface, for example, fiberglass type EZ-100 or polymer like Poviden.

The sound-absorbing material of the fence is made in the form of crumbs from solid vibration-damping materials, for example, elastomer, polyurethane, or plastic compound such as Agate, Anti-Vibrate, Shvim, placed in a shell made of soundproof material, and the size of the fractions of the crumb lies in the optimal range of values: 0 , 3 ÷ 2.5 mm (not shown in the drawing).

It is possible to perform sound-absorbing fencing material based on aluminum-containing alloys, followed by filling them with titanium hydride or air with a density in the range 0.5–0.9 kg / m ³ with the following strength properties: compressive strength in the range 5–10 MPa, bending strength within 10 ÷ 20 MPa, or from soft foamed porous sound-absorbing material, for example, foamed polyurethane foam or polyethylene foam, or from rigid porous sound-absorbing material, for example foam aluminum.

The casing works as follows.

During operation of the machine, the sound pressure energy generated by its spindles is absorbed by the sound-absorbing layer 6 of the fence, and the vibration-absorbing layer dampens the vibrations of the thin metal casing, which is the source of acoustic vibration. The damping effect increases with the removal of the vibration-absorbing layer from the neutral axis of the spindle bar during bending due to an increase in deformation. This effect is just realized in this design of fencing with slats that provide spatial damping, the loss coefficient of which is 0.2 compared to 0.05 with conventional damping in the frequency range from 200 to 3000 Hz. The removal of the vibration-absorbing viscoelastic layer from the neutral axis of the spindle beam during bending causes an increase in the deformation of the casing and planks, which leads to increased friction between the vibration-absorbing layer and the casing and planks and helps to dissipate the energy of vibration.

Claims (5)

1. The casing of the spindles of a textile machine, comprising a guard with a vertically arranged removable cover and with a vibration-absorbing layer and a sound-absorbing layer fixed on its inner surface at the level of the spindles of the machine, characterized in that the fence is made of upper and lower parts , each of which consists of a body made of sheet corners with an angle at the apex of 90 °, rigidly attached to the spindle beam in its upper and lower parts, while the thickness of the Vibration plates and layer 2 ÷ 4 times greater than the thickness of plates and the housing cover, wherein the housing elements are mounted on the machine by means of rubber isolators, the overall rigidity is lower than the rigidity of the vibration-isolating suspension spindle. 2. The casing according to claim 1, characterized in that as the material of the vibration-absorbing layer, an elastic sheet of vibration-absorbing material with an internal loss coefficient of at least 0.2, or a composite material, or plastic compound is used. 3. The casing according to claim 1, characterized in that the elements of mineral wool based on basalt or mineral wool, or basalt wool, or glass wool lined with glass wool, or foamed polymer, for example polyethylene or polypropylene, are used as sound-absorbing material of the enclosure. the element is lined with an acoustically transparent material, for example fiberglass or polymer, over its entire surface. 4. The casing according to claim 1, characterized in that the sound-absorbing material of the enclosure is made of soft foamed porous noise-absorbing material, for example, foamed polyurethane foam or polyethylene foam, or of rigid porous noise-absorbing material, for example foam aluminum. 5. The casing according to claim 1, characterized in that the sound-absorbing material of the fence is made in the form of crumbs of solid vibration-damping materials, for example elastomer, polyurethane or plastic compound, placed in a shell of soundproof material, and the size of the fractions of the crumb lies in the optimal range of values of 0.3 ÷ 2.5 mm.