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IPC classes for russian patent Piece-work sound absorber of ship cabin (RU 2513898):
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 Single-piece sound absorber / 2495202
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 Wet spinning substrate with high sound absorption / 2482084
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 Acoustic structure of workshop / 2480561
Acoustic structure of a workshop comprises a frame, bearing walls with barriers in the form of a floor and a ceiling, which are tiled with sound-absorbing structures, window and door openings, and also piece sound absorbers, comprising a frame, where a sound-absorbing material is arranged, and installed above noisy equipment. The floor is arranged on an elastic base and comprises a fixed plate made of concrete reinforced with a vibration-damping material, which is installed on a base plate of a floor-to-floor slab with cavities via layers of the vibration-damping material and hydraulic insulation material with a gap relative to bearing walls of a production room. Piece sound absorbers are made in the form of an element of a noise muffler, comprising a body with a flap cover filled with a sound-absorbing material placed into a protective shell. Body walls are formed with a sound-absorbing structure made in the form of cylindrical perforated coaxial shells - outer and inner ones, between which a sound absorber is arranged, made at least of one profiled porous sheet. The sheet profile in the section may be triangular, rectangular, trapezoidal, in the form of circular arcs, sinusoidal. The sound-absorbing material is represented by boards of mineral wool on basalt basis, or mineral wool, or basalt wool, or glass wool. The sound-absorbing element along its entire surface is lined with an acoustically transparent material. The sound-absorbing material of the sound absorber in the sound-absorbing structure of the body is a porous noise-attenuating material.
 Noise-protective panel / 2478762
Noise-protective panel comprises two plates, between which there is a honeycomb structure with holes at side faces of hollow cells. On the outer surface of at least one of plates with holes there is a cellular lattice covered with a film. Geometric centres of each lattice cell match geometric centres of appropriate holes in a panel plate. The cellular lattice has height creating an air layer between the plate surface and the film. Between the outer surface of at least one of plates with holes and the cellular lattice there is additionally a fine-meshed net is installed.
 / 2268966
 / 2274710
 / 2282003
 / 2282004
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 / 2305157
 / 2325489
 / 2327842
 / 2334062
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FIELD: transport.
SUBSTANCE: invention relates to ship building can cab be used as a work-piece noise absorber for cabins of whatever ships. Proposed noise absorber is composed of trihedral pyramidal structure composed of inclined faces to vertex the vertex by fasteners, said vertex being surrounded by conical noise-absorbing surface secured to ship bulkhead and lined with acoustically transmissive material. Ship bulkhead makes said vertex whereto perforated inclined faces are secured by fasteners and resilient braces via vibration damping elements. Resilient braces are arranged inside the carcass in the plane perpendicular to ship bulkhead. One end of the braces is secured to hooks attached to bulkhead while another end is secured to fasteners tightening inclined faces whereto, from inside, attached is incombustible noise-absorbing material wrapped by acoustically transmissive material. Air space exists inside said carcass between the layers of noise-absorbing material while between perforated inclined faces and noise-absorbing incombustible material air gap exists to suppress low-frequency noise.
EFFECT: better noise and heat insulation of ship cabin.
2 dwg
The invention relates to transport machinery and can be used as a piece of material in the cabins on the river, marine vessels and other water transport objects.
Famous piece material in the cabins on the river boat on the patent of Russian Federation №2451780 (prototype)made in the form of at least three-sided pyramidal structures consisting of inclined faces, with the inner side attached to the absorbent non-flammable material wrapped with acoustically transparent material, while the inside of the frame between the layers of absorbent material has an air cavity.
The disadvantages of this cab are poor damping of structural noise, the inability to suppress reverberation, the poor quality of the cabin interior and poor insulation.
The technical result is greater comfort in the cabin and better working conditions for the operator.
This is achieved by the fact that the ship's cabin block material made in the form of at least three-sided pyramidal structures consisting of inclined faces, United with the formation of vertex fasteners, and as the base of a triangular pyramid is used ship's bulkhead, to which through vibrationfree elements is the exploits of fasteners and elastic tie-rods are attached perforated inclined faces, when this elastic tie located inside the frame in the plane perpendicular to the ship's bulkhead, and one end of the screed is attached to the hooks on the bulkhead, and the other end to the mounting elements, tightening inclined faces on the inner side attached to the absorbent non-flammable material wrapped with acoustically transparent material, while the inside of the frame between the layers of absorbent material has an air cavity and between the perforated sloping faces and non-combustible sound-absorbing material has an air gap, which serves to suppress noise in the low frequency range.
1 shows a General view of acoustic trim of the ship cabins; figure 2 - piece material cabins.
Piece absorber ship cabins (figure 1) is a stamped metal frame 6 consisting of load-bearing profile structures (not shown), inside of which is installed packages zvukoteploizoljatsii elements 10, each of which includes layers vibrationfree material for bituminous base and at least one layer of porous sound-absorbing material and a perforated cover plate, and between the panel and the layer of porous sound-absorbing material is formed an air gap (drawing does not show is about). Inside cabins to the ceiling and walls are attached piece heat sinks (figure 2). Frame 6 cabins connected to the supporting structures vessel 1 through the vibration-insulating system, consisting of an upper suspension comprising at least two rubber insulator 2 and 3, the upper suspension cabins and at least two insulator 4 and 5 of the lower suspension cabins, made in the form of a cylindrical or conical coil springs. Inside cabins are table 7, chair 8 and the bed 9 for vessel maintenance personnel, and mount these items to the frame 6 cabins may be rigidly or through vibrationfree strip (not shown).
Packages zvukoteploizoljatsii elements 10 can be made either solid or composed of elements (not shown)inscribed in the contour of the frame 6 cabins, and consisting of a front with slotted perforations and rear walls of stainless steel or galvanized sheet with a thickness of 0.7 mm with a polymeric protective decorative coating type "Pural" thickness of 50 μm or "Polyester" with a thickness of 25 μm, or aluminum sheet thickness of 1.0 mm and a thickness of 25 μm. With the front and rear walls of the package may be made from structural materials, coated on their surface with one or both sides with a layer of soft vibrationalrotational, for example mastic VD - 17, or material type "Guerlain-D", and the ratio between the thickness of the cladding and vibrationfree coating lies in the optimum range of values- 1: (2,5...3,5).
The sound-absorbing material zvukoteploizoljatsii elements 10 made in the form of slabs of basalt mineral wool on the basis of type "1{sugao", or mineral wool of type "URSA", or basalt wool type P-75, or glass wool lined with glass wool material, or a foamed polymer, such as polyethylene or polypropylene, and an absorbent element across its surface lined with acoustically transparent material.
Piece material (Figure 2) ship cabins consists of a rigid frame made in the form of at least three-sided pyramidal structure consisting of three perforated inclined faces 12, connected with the formation of vertex fasteners 17. As the base of a triangular pyramid is used ship's bulkhead 11, which through vibrationfree elements 15 by fasteners 14 and elastic tie-rods 16 are attached perforated sloping faces 12. When this elastic couplers 16 are located inside the frame in the plane perpendicular to the ship's bulkhead 11. One end of the screed is attached to the hooks on the bulkhead 11 and the other end to the mounting element is am 7.
On the inner side of the frame to the perforated inclined faces 12 attached non-combustible sound-absorbing material 13 (e.g., vinitor, fiberglass), wrapped with acoustically transparent material, such as fiberglass. Inside the frame between the layers of sound-absorbing material 13 has an air cavity 18, and between the perforated inclined faces 12 and absorbent non-combustible material 13 has an air gap 19, which serves to suppress noise in the low frequency range.
The pyramidal design of a piece of material, consisting of inclined faces 12, connected with the formation of the vertices on the outside with an air gap 20 surrounds the absorbent conical surface 21 of the fixed base to the ship's bulkhead 11 and lined the outside of acoustically transparent material 22.
Piece absorber ship cabins operates as follows. Sound waves propagating in the cabin, interact with sound-absorbing material 13. The absorption at low and medium frequencies is due to the acoustic effect based on the principle of Helmholtz resonators formed by air cavities 18. Various amounts of the resonant cavities are used to suppress the sound vibrations in the desired audio frequency range, typically bol is high volume for noise suppression at low frequencies, and small - in the region of medium and high frequencies. The air gap 20 between the sloping faces 12 and conical sound-absorbing surface 21 is coated on the outside acoustically transparent material 22, allows to increase the efficiency at low frequencies due to the introduction of additional air volume that is involved in the effect of the resonator "Helmholtz".
The interaction of sound waves with the material leads to samohlasen in the high frequency range, and the execution of non-combustible absorbent materials makes the design fire-safe.
Piece absorber ship cabins containing metal press-welded frame consisting of supporting specialized structures within which installed packages zvukoteploizoljatsii elements, each of zvukoteploizoljatsii elements includes layers vibrationfree material for bituminous base and at least one layer of porous sound-absorbing material and a perforated cover plate, and between the panel and the layer of porous sound-absorbing material is formed an air gap, at the same time frame cabins connected to the supporting structures of the vessel by means of the vibration system consisting of the upper suspension comprising at least two rubber insulator upper suspension cabins is at least two of insulator lower suspension cabins, made in the form of a cylindrical or conical coil springs, and packages zvukoteploizoljatsii elements can either be solid or composed of elements inscribed in the contour of the frame of the cab, and the sound-absorbing material zvukoteploizoljatsii elements made in the form of slabs of basalt mineral wool on the basis of and throughout its surface lined with acoustically transparent material, and a piece of the material made in the form of at least three-sided pyramidal structures consisting of inclined faces, United with the formation of vertex fasteners, and as the base of a triangular pyramid is used ship's bulkhead, to which through vibrationfree elements by fasteners and elastic tie-rods are attached perforated sloping faces, with elastic ties are located inside the frame in the plane perpendicular to the ship's bulkhead, and one end of the screed is attached to the hooks on the bulkhead, and the other end to the mounting elements, tightening inclined faces on the inner side attached to the absorbent non-flammable material wrapped with acoustically transparent material, while the inside of the frame between layers of absorbent mother is La there is an air cavity, and between the perforated sloping faces and non-combustible sound-absorbing material has an air gap, which serves to suppress noise in the low frequency range, characterized in that on the outside, three-sided pyramidal structure with an air gap surrounds the absorbent conical surface of the fixed base to the ship's bulkhead outside and lined with acoustically transparent material.
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