Hydrodynamic noise suppressor

FIELD: machine building.

SUBSTANCE: suppressor is intended for reduction of hydrodynamic noise level emitted by liquid flow in pipelines. In closed cavity of hydrodynamic noise suppressor, pliable element is installed, for instance, hose, ends of which are connected to nipples withdrawn outside casing, pliable element is filled with air of pressure equal to maximum operating pressure of liquid, and free space of cavity is filled with loose or deformable substance, for instance, sand or rubber balls with diameter of up to 5 mm.

EFFECT: lower level of hydrodynamic noise level downwards hydrodynamic noise suppressor at all working modes by pressure, and also exclusion of necessity for adjustment and control.

2 cl, 1 dwg

 

The invention is intended to reduce hydrodynamic noise (GHGS)emitted by the fluid flow in pipelines, and can be used in ship systems, energy and other systems where high demands on the level emitted by equipment noise or hydrodynamic noise. The device can also be used to reduce hydrodynamic noise emitted from various of devices, such as valves, pumps, regulators, etc. placed on the pipelines. In this case GHDS is located at the source of the noise on the pipeline.

It is known that when converting energy of a fluid, flowing around obstacles, the vorticity is radiated hydrodynamic noise, which is in the form of aerodynamic noise can radiate including the external environment, worsening living conditions, as well as exciting design elements on their own frequencies, which become additional sources of radiated noise.

There are various ways of dealing with radiated noise: by reducing the flow velocity in the piping improvements structures radiating noise, and with the help of special devices.

Thus, the known vibration damper pressure in hydraulic systems (Ed. St. USSR №202778, IPC F16L 55/04, 1966), which consists of a casing, a Central tube, the TKO is connected to movable in the axial direction is impervious to liquid partition, caught between the elastic paristemi glasses, made for example of woven metal material. Through the porous walls of the cups is the throttling of the fluid flow, thereby increasing the damping effect.

Also known multimode gas damper, comprising a housing with inlet and outlet nozzles communicated with a working pipeline, and a damping device made in the form of an elastic membrane, is placed in the case with the formation of cavities management (Ed. St. No. 1359546, USSR, IPC F16L 55/04, 1985).

This unit is closest to the proposed by the task being solved and achieved technical effect. In the device of the damping action is provided by the elastic tubes that are installed perpendicular to the flow with the formation of membranes closed cavity, with the cavity control in communication with the suction inlet. This is achieved by enhancing the capacity of the damper.

The disadvantage of this design solution is the need to regulate the air pressure depending on the pressure of water or a small range of operating pressures and complexity of constructive placement of the hoses inside the case.

The present invention is a significant reduction of hydrodynamic noise for damper g is drodynamical noise (GGDS) at all operating conditions pressure, as well as eliminating the need for configuration and control.

The problem is solved in that the damper noise (GGDS), comprising a housing mounted on the pipe and containing a closed cavity that is separated from the liquid rubber membrane in the cavity is pliable element, for example a hose, the ends of which are connected with the nipple, bred out the body, malleable element is filled with air with a pressure equal to the maximum working fluid pressure, and the free space of the cavity filled with granular or deformable material, for example sand or rubber balls with a diameter of 5 mm, an Inner diameter of the rubber membrane may be greater than the input and output diameters GHDS.

The drawing shows a view GHDS in the section.

It consists of a body 1, which together with spherical rubber or rubber-cord shell 2 form a closed cavity 3 within which is pliable element (hose) 4. Rubber cover is designed so that the maximum diameter Dmaxshell greater diameter D of the entrance and exit. The cavity is filled with sand or other pliable substance (rubber balls), the ends of the pliable element is mounted to the nipple 5. On the housing there is a hole closed by a cover 6, through which the cavity is filled with loose material. blocka is mounted between the casing and the intermediate flanges 7, which in turn are connected with the flanges of the piping 8.

The positive effect is due to the fact that the presence of legkodeformiruemyh shell element leads to a significant reduction of the velocity of sound in the cavity GHDS, which leads to the absorption of the pass-through hydrodynamic noise.

GHDS works as follows.

GHDS is installed on the pipeline for the source of the noise. At maximum working pressure of the fluid in the pipeline and is equal to the air pressure in the hose 4 shell 2 practically does not feel pressure drop and retains its pliability. By reducing the operating pressure of the fluid volume of the element 4 with the air increases, the air pressure decreases, the internal volume GHDS decreases, while the malleability of the shell is preserved. The presence of granular material also plays a role of an additional absorber of sound energy. This ensures that the effective damping of noise over the entire operating pressure range. As for damping noise (pulse pressure) is sufficiently small deformations, which lead to a significant reduction in the speed of sound in the cavity GHDS, the effectiveness of such enforcement GHDS will be significantly higher than in the known devices.

1. The damper hydrodynamic noise, comprising a housing mounted on the pipeline which contains a closed cavity, separated from the liquid rubber membrane, characterized in that the cavity is pliable element, for example a hose, the ends of which are connected with the nipple, bred out the body, malleable element is filled with air with a pressure equal to the maximum working fluid pressure, and the free space of the cavity filled with granular or deformable material, for example sand or rubber balls with a diameter of 5 mm.

2. The damper hydrodynamic noise according to claim 1, characterized in that the inner diameter of the rubber shell more input and output diameters of the damper hydrodynamic noise.



 

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