RU2644786C1 - Acoustic screen for psk type spinning machines - Google Patents

Acoustic screen for psk type spinning machines Download PDF

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Publication number
RU2644786C1
RU2644786C1 RU2017108138A RU2017108138A RU2644786C1 RU 2644786 C1 RU2644786 C1 RU 2644786C1 RU 2017108138 A RU2017108138 A RU 2017108138A RU 2017108138 A RU2017108138 A RU 2017108138A RU 2644786 C1 RU2644786 C1 RU 2644786C1
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Russia
Prior art keywords
sound
length
absorbing
prismatic
diameter
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RU2017108138A
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Russian (ru)
Inventor
Олег Савельевич Кочетов
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Олег Савельевич Кочетов
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    • DTEXTILES; PAPER
    • D02YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02GCRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
    • D02G3/00Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
    • D02G3/22Yarns or threads characterised by constructional features, e.g. blending, filament/fibre
    • D02G3/26Yarns or threads characterised by constructional features, e.g. blending, filament/fibre with characteristics dependent on the amount or direction of twist
    • D02G3/28Doubled, plied, or cabled threads
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04BGENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62Insulation or other protection; Elements or use of specified material therefor
    • E04B1/74Heat, sound or noise insulation, absorption, or reflection . Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
    • E04B1/82Heat, sound or noise insulation, absorption, or reflection . Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to sound only
    • E04B1/8209Heat, sound or noise insulation, absorption, or reflection . Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to sound only sound absorbing devices

Abstract

FIELD: acoustics.
SUBSTANCE: invention relates to industrial acoustics, for example, directed at noise reduction of spindle drive of spinning machines. Technical result is achieved by the fact that the acoustic screen for PSK (self-twisting spinning machines) type spinning machines contains a soundproof cover that seals the aerodynamic torsion device (ATD) assembly together with the original product, the drawer roller and the belt. Cover is lined with sound-absorbing material and an acoustically transparent film of "poviden" type (copolymer of vinyl chloride and vinyliden chloride). Drawer roller with a total length L and outer diameter D has at least three grooves with a diameter d: central groove of length L2 and lateral grooves of length L1, while the ratio of the outer diameter D of the drawer roller to the diameter d of the grooves lies in the optimum range of values: D/d=1.04…1.05, and the ratio of the total length L of the roller to the length L2 of the central groove lies in the optimum range of values: L/L2=4.3…4.4, and the ratio of the length L2 of the central groove to length L1 of the lateral grooves lies in the optimum range of values: L2/L1=2.0…2.2, the sound-absorbing material on the inner surface of the cover is made on the basis of aluminum-containing alloys, the lining of the soundproof cover is made with resonant inserts and comprises a smooth and perforated surface between which a layer of sound-absorbing material of a complex shape is disposed, a layer of complex shape is an alternation of solid sections and hollow sections, the hollow sections are formed by prismatic surfaces that have a parallelogram shape in a section parallel to the plane of the drawing. Inner surfaces of the parallelogram have a toothed structure, the tips of the teeth turned inward the prismatic surfaces, and the edges of the prismatic surfaces are fixed respectively on the smooth and perforated walls, and cavities of hollow sections formed by prismatic surfaces are filled with a sound absorber, and between a smooth surface and continuous sections of a layer of sound-absorbing material of a complex shape, as well as between the perforated surface and solid sections, resonant plates with resonant inserts that perform the functions of the Helmholtz resonator necks are located.
EFFECT: technical result is an increase in the efficiency of noise suppression due to the expansion of the frequency spectrum in resonant modes by introducing resonant elements into the lining that expand the spectrum of the noise suppression frequencies.
1 cl, 4 dwg

Description

The invention relates to industrial acoustics, for example, to reduce the noise of the drive spindles of spinning machines.
Known acoustic screen for spinning machines with a spinning spinning chamber (UCS), used to dampen the noise on a machine created by a block of aerodynamic twisting devices (AKU), known (see Sofonovsky V.I. Labor protection in the textile industry. M.: Legprombytizdat, 1987, p. 56, fig. 12).
The closest technical solution in terms of technical nature and the achieved result is an acoustic screen for spinning machines with a spinning spinning chamber (UCS) according to RF patent No. 2351698 (prototype), containing a soundproof lid that hermetically seals the AKU unit together with the original product, the exhaust roller and belt moreover, the lid is lined with sound-absorbing material.
The disadvantage of the technical solution adopted as a prototype is the relatively low efficiency of noise attenuation due to the absence of resonant elements in the lining of the lid, expanding the spectrum of noise attenuation frequencies.
The technical result is an increase in the efficiency of sound attenuation due to the expansion of the frequency spectrum in resonance modes by introducing resonant elements into the lining, expanding the frequency spectrum of sound attenuation.
This is achieved by the fact that in the acoustic screen for spinning machines of the PSK type, containing a soundproof cover, hermetically closing the AKU unit together with the original product, the exhaust hood and belt, the cover is lined with sound-absorbing material and an acoustically transparent film of the “seen” type, and on the roller of an exhaust device with a total length L and an outer diameter D made at least three grooves of diameter d: a central groove of a length L 2 and side grooves of a length L 1 , while the ratio of the outer diameter D of the exhaust roller of the device to the diameter d of the grooves lies in the optimal range of values: D / d = 1,04 ... 1,05, and the ratio of the total length L of the roller to the length L 2 of the central groove lies in the optimal range of values: L / L 2 = 4,3 ... 4.4, and the ratio of the length L 2 of the central groove to the length L 1 of the side grooves lies in the optimal range of values: L 2 / L 1 = 2.0 ... 2.2, while the sound-absorbing material on the inner surface of the lid is made on the basis of aluminum-containing alloys, followed by filling them with titanium hydride or air with a density in the range of 0.5 ... 0.9 kg / m 3 with the following property properties: compressive strength in the range of 5 ... 10 MPa, bending strength in the range of 10 ... 20 MPa, or in the form of crumbs of solid vibration-damping materials, for example elastomer, polyurethane, placed in a shell of soundproof material, and the size of the fractions of crumbs lies in optimal range of values: 0.3 ... 2.5 mm, and the lining of the soundproof cover is made with resonant inserts and contains smooth and perforated surfaces, between which there is a layer of sound-absorbing material of complex shape, a layer of complex shape is an alternation of solid sections and hollow sections, and the hollow sections are formed by prismatic surfaces having in cross section parallel to the plane of the drawing, a parallelogram shape, the inner surfaces of which have a toothed structure, with the tops of the teeth facing the inside of the prismatic surfaces, and the edges of the prismatic surfaces are fixed respectively to smooth and perforated walls, and the cavities of the hollow sections formed by prismatic surfaces are filled with ukopoglotitelem, and between the smooth surface and the solid portions of complex shape layer sound-absorbing material, and between the surface of the perforated and solid portions of the plate located resonant with the resonance inserts, performing functions necks resonators "Helmholtz".
In FIG. 1 shows a sectional acoustic screen; FIG. 2 is a plan view of FIG. 1, in FIG. 3 is a general view of a roller of a draft device with grooves; FIG. 4 is a diagram of a lining of a lid with resonant elements.
The acoustic screen for the aerodynamic twisting device (hereinafter ACU unit) of the PSK type spinning machines comprises a soundproof cover 1, hermetically closing the AKU unit 4 together with the initial product 5 (for example, roving), the exhaust roller 7 and the belt 6. The inner surface of the cover is lined with sound-absorbing material 2 and an acoustically transparent film of the 3 “visible” type. At least three grooves of diameter d are made on a roller 7 with a total length L and an outer diameter D: a central groove 9 of a length L 2 and side grooves 8 and 10 of a length L 1 . The ratio of the outer diameter D of the roller 7 of the exhaust device to the diameter d of the grooves 8 and 9 lies in the optimal range of values: D / d = 1,04 ... 1,05, and the ratio of the total length L of the roller 7 to the length L 2 of the central groove 9 lies in the optimal the range of values: L / L 2 = 4.3 ... 4.4, and the ratio of the length L 2 of the central groove 9 to the length L 1 of the side grooves 8 lies in the optimal range of values: L 2 / L 1 = 2.0 ... 2.2 . The distance B from the ends of the roller 7 to the last side grooves 8 is 5 mm.
Sound-absorbing material 2 on the inner surface of the lid 1 is made on the basis of 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 in the range of 10 ... 20 MPa, or from a soft foamed porous noise-absorbing material, for example, foamed polyurethane foam or polyethylene foam, or from a rigid porous noise-absorbing material, for example foam aluminum.
Sound-absorbing material 2 on the inner surface of cover 1 is made of rockwool basalt mineral wool or URSA type mineral wool or P-75 basalt wool or glass wool lined with glass wool or foamed polymer, such as polyethylene or polypropylene moreover, the sound-absorbing element over its entire surface is lined with an acoustically transparent material, for example, fiberglass type EZ-100 or polymer type "Poviden."
Sound-absorbing material 2 on the inner surface of the lid 1 is made in the form of crumbs of solid vibration-damping materials, such as elastomer, polyurethane, or plastic compound such as “Agate”, “Anti-vibration”, “Shvim”, which is placed in a shell of soundproof material, and the size of the fractions of the crumbs lies in optimal range of values: 0.3 ... 2.5 mm (not shown in the drawing).
The lining of the soundproof cover 1 (Fig. 4) is made with resonant inserts and contains a smooth 11 and perforated 12 surface, between which there is a layer of sound-absorbing material of complex shape, which is an alternation of solid sections 13 and hollow sections 15, and the hollow sections 15 are formed by prismatic surfaces, having in cross section parallel to the plane of the drawing, the shape of a parallelogram, the inner surfaces of which have a gear structure 16, or wavy, or a surface with spherical surfaces (not shown in the drawing). Cavities 14 formed by smooth 11 and perforated 12 surfaces, between which a layer of sound-absorbing material of complex shape is located, are filled with a sound absorber. In this case, the tops of the teeth are turned inward to the prismatic surfaces, and the ribs of the prismatic surfaces are fixed respectively on the smooth 11 and perforated 12 walls. The cavities 17 of the hollow sections 15 formed by prismatic surfaces are filled with construction foam. Between a smooth 11 surface and solid sections 13 of a layer of sound-absorbing material of complex shape, as well as between a perforated 12 surface and solid sections 13 there are resonant plates 18 and 19 with resonant inserts 20, which serve as the neck of Helmholtz resonators.
As a sound-absorbing material of the first, more rigid layer, a material based on aluminum-containing alloys was used, followed by filling them with titanium hydride or air with a density in the range of 0.5 ... 0.9 kg / m 3 with the following strength properties: compressive strength in the range of 5 ... 10 MPa, bending strength in the range of 10 ... 20 MPa, for example foam aluminum.
Rockwool type mineral wool or URSA type mineral wool or P-75 type basalt wool or glass wool lined with glass wool or foamed polymer, such as polyethylene or polypropylene.
The material of the perforated surface is made of solid, decorative vibration-damping materials, for example, agate, antivibrate, and shvim plastic compounds, and the inner surface of the perforated surface facing the sound-absorbing structure is lined with an acoustically transparent material, such as fiberglass type EZ-100 or "Poviden" type polymer.
The lining of the soundproof cover 1 (Fig. 4) works as follows.
Sound energy, passing through a layer of perforated surface 12 and a combined sound-absorbing layer of complex shape, decreases, since the transition of sound energy into thermal energy (dissipation, energy dissipation) occurs, i.e. in the pores of the sound absorber, which are the Helmholtz resonator model, there are energy losses due to friction, which fluctuates with the excitation frequency of the mass of air in the mouth of the resonator, against the walls of the neck itself, which has the form of a branched network of micropores of the sound absorber. Between a smooth 11 surface and solid sections 13 of a layer of sound-absorbing material of complex shape, as well as between a perforated 12 surface and solid sections 13, there are resonant plates 8 and 9 with resonant inserts 10 that serve as the neck of Helmholtz resonators. The resonant holes 20 (inserts) located in the resonant plates 18 and 19, serve as the neck of the Helmholtz resonators, the frequency band of the damping of sound energy of which is determined by the diameter and number of resonant holes 20.
The acoustic screen works as follows.
The sound energy emitted by the ACU unit 4, the drive 6 and the rotating roller 7, enters the walls of the housing 1, lined with sound-absorbing material 2. The transition of sound energy into heat (dissipation, energy dissipation) occurs in the pores of the sound absorber, which are the model of Helmholtz resonators ', where energy losses occur due to friction, which fluctuates with the excitation frequency, the mass of air in the mouth of the resonator against the walls of the mouth itself, which has the form of a branched network of pores of a sound absorber. The acoustic screen proposed by the authors is an effective means of combating industrial noise, and it is easy to maintain and manufacture.

Claims (1)

  1. An acoustic screen for spinning machine type PSK, containing a soundproof cover that seals the ACU unit together with the original product, the exhaust roller and belt, the lid is lined with sound-absorbing material and an acoustically transparent film of the “seen” type, and the exhaust roller has a total length of L and at least three grooves of diameter d are made with an outer diameter D: a central groove of a length L 2 and side grooves of a length L 1 , while the ratio of the outer diameter D of the exhaust roller to the diameter d pr the outflow lies in the optimal range of values: D / d = 1,04 ... 1,05, and the ratio of the total length L of the roller to the length L 2 of the central groove lies in the optimal range of values: L / L 2 = 4,3 ... 4,4, and the ratio of the length L 2 of the central groove to the length L 1 of the side grooves lies in the optimal range of values: L 2 / L 1 = 2.0 ... 2.2, while the sound-absorbing material on the inner surface of the lid is made on the basis of aluminum-containing alloys with their subsequent filling titanium hydride or air density within 0.5 ... 0.9 kg / m 3 with the following strength properties: Durable compression in the range of 5 ... 10 MPa, bending strength in the range of 10 ... 20 MPa, or in the form of crumbs of solid vibration-damping materials, for example elastomer, polyurethane, placed in a shell of soundproof material, and the size of the fractions of crumbs lies in the optimal range of values : 0.3 ... 2.5 mm, characterized in that the lining of the soundproof cover is made with resonant inserts and contains smooth and perforated surfaces, between which there is a layer of sound-absorbing material of complex shape, a layer of complex shape This is an alternation of solid sections and hollow sections, and the hollow sections are formed by prismatic surfaces having a section parallel to the plane of the drawing, the shape of a parallelogram, the inner surfaces of which have a toothed structure, with the tops of the teeth facing the inside of the prismatic surfaces, and the edges of the prismatic surfaces fixed respectively on smooth and perforated walls, and the cavities of the hollow sections formed by the prismatic surfaces are filled with sound insulation resonator plates with resonant inserts that serve as the necks of the Helmholtz resonators are located between the smooth surface and the continuous sections of the layer of sound-absorbing material of complex shape, as well as between the perforated surface and the continuous sections.
RU2017108138A 2017-03-13 2017-03-13 Acoustic screen for psk type spinning machines RU2644786C1 (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4107911A (en) * 1976-06-18 1978-08-22 Murata Kikai Kabushiki Kaisha Pneumatic spinning apparatus
DE4004049A1 (en) * 1990-02-10 1991-08-14 Fritz Stahlecker DEVICE FOR PNEUMATIC SPIRAL SPINNING WITH AT LEAST ONE AIR NOZZLE ARRANGED BY A DRAWER
JPH1165572A (en) * 1997-08-21 1999-03-09 Tokai Rubber Ind Ltd Acoustic absorption member
RU2351698C1 (en) * 2007-07-26 2009-04-10 Олег Савельевич Кочетов Acoustic screen for spinning machines of type "пск"
RU2511528C1 (en) * 2013-04-10 2014-04-10 Олег Савельевич Кочетов Acoustic screen for spinning machines

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4107911A (en) * 1976-06-18 1978-08-22 Murata Kikai Kabushiki Kaisha Pneumatic spinning apparatus
DE4004049A1 (en) * 1990-02-10 1991-08-14 Fritz Stahlecker DEVICE FOR PNEUMATIC SPIRAL SPINNING WITH AT LEAST ONE AIR NOZZLE ARRANGED BY A DRAWER
JPH1165572A (en) * 1997-08-21 1999-03-09 Tokai Rubber Ind Ltd Acoustic absorption member
RU2351698C1 (en) * 2007-07-26 2009-04-10 Олег Савельевич Кочетов Acoustic screen for spinning machines of type "пск"
RU2511528C1 (en) * 2013-04-10 2014-04-10 Олег Савельевич Кочетов Acoustic screen for spinning machines

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