RU2618642C1 - Silencer for path gas turbine plant - Google Patents

Abstract

FIELD: machine engineering.

SUBSTANCE: silencer to tract the gas turbine unit comprises a body in the form of a skeleton, covered with panels on the sides, top, bottom, absorbing elements with straight section forming a channel plates mounted within the baffle housing, dividing the inner cavity of the housing into two parts, made in the form of plates absorbing elements having a radial portion matched with a straight section located in every part of the body to form between the sound-absorbing elements, elements and panels channels uniformly expanding from the body to the ends of the bottom panel.

EFFECT: use of the invention eliminates the rectilinear propagation of sound waves and thereby provide a noise load within acceptable health regulations to reduce the resistance path is pumped cooling system of a gas turbine installation.

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Description

The invention relates to mechanical engineering, namely to silencers in the ducts of exhaust gas and exhaust from power plants and the paths of injection systems for cooling power plants, and can be used for cooling systems of gas pumping units and power plants.

A known design of an active type silencer in which the principle of spatially uniform distribution of sound-absorbing material over the passage section of the silencer is used. This principle is used in plate silencers, which are most widely used in the practice of both domestic and foreign turbocompressor engineering.

A known design of a multi-section honeycomb silencer for the exhaust gas turbine installation (RF patent No. 2367807), comprising a housing consisting of separately connected sections made of a metal frame, each of the side, lower and upper walls (panels) of which are coated with a layer of sound-absorbing material. Each section contains sequentially placed modules in which sound-absorbing elements of sound-absorbing material are installed, dividing the internal space of the silencer casing into a series of parallel channels. The thickness of the sound-absorbing elements and the distance between them are the same throughout the channel section. The sound attenuation in the silencer is resonant in nature. We take this design as a prototype.

Known silencer has several disadvantages:

- the basic principle of noise suppression optimality is not implemented - uniform distribution of sound-absorbing material and channels for air passage, as a result of which aerodynamic and hydraulic drag is not reduced;

- the manufacture of a single sound-absorbing element in the form of a perforated half-shell filled with sound-absorbing material, and its fastening with the module housing due to the rod does not provide structural rigidity, which reduces its reliability.

The objective of the invention is to increase the efficiency of damping noise, as well as reducing aerodynamic and hydraulic drag in the discharge path of the cooling system of a gas turbine installation.

The technical result consists in the fact that the rectilinear propagation of sound waves is excluded due to the configuration of the sound-absorbing element and the design of the body of the silencer.

The technical result is achieved by the fact that the silencer for the gas turbine installation path comprises a housing in the form of a frame, sheathed with panels on the sides, from above, from below, sound-absorbing elements with a straight section, forming channels with panels, a partition installed inside the housing, dividing the internal cavity of the housing into two parts made in the form of plates sound-absorbing elements having a radial section mating with a straight section located in each part of the housing with the formation between the sound-absorbing elements, e elements and channel panels, uniformly expanding from the ends of the housing to the bottom panel.

It is possible to implement a noise muffler for a gas turbine installation path with a first sound-absorbing element from the bottom without a radial section.

The location inside the case of the partition dividing the internal cavity of the case into two parts, and the holes in the bottom panel allow air to be taken from the ends of the case, rotate it inside the case and let it out through the holes in the bottom panel. Sound-absorbing elements in the form of plates made with radial sections mating with straight sections installed in each part of the housing allow the channels to form evenly expanding from the ends of the housing to the bottom panel, which, in turn, eliminates the direct propagation of sound waves, increasing the efficiency of noise suppression and reducing aerodynamic and hydraulic resistance in the discharge path of the cooling system of a gas turbine installation. Since the sound-absorbing elements of the sound-absorbing material have a radial section mating with the straight section, the sound absorption surface increases and thereby the efficiency of noise suppression at medium and high frequencies is increased.

Under certain conditions, the first sound-absorbing element from the bottom is performed without a radial section, for the formation of channels (section) of a given configuration.

The figure 1 shows a General view of a silencer for the path of a gas turbine installation.

The figure 2 shows the body of the silencer.

The figure 3 shows the sound-absorbing element of a silencer.

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) от торцов 9 корпуса к нижней панели 5 каналов 8.The noise suppressor for the gas turbine installation tract comprises a housing 1 in the form of a frame 2, sheathed with panels on the sides 3, on top 4, on the bottom 5, sound-absorbing elements 6 with a straight section 7, forming channels 8 with the panels. The ends 9 of the housing are open, the bottom panel 5 is made holes, a partition 10 is installed inside the housing, dividing the internal cavity of the housing 1 into two parts. At the same time, the sound-absorbing elements 6 have a radial section 11, mating with a straight section 7, and are located in each part of the housing 1 with the formation of uniformly expanding (

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) from the ends 9 of the housing to the bottom panel of 5 channels 8.

Sound waves with a turbulent air flow enter the cavity of the silencer body 1 through the ends 9 of the body 2, sheathed with panels (3, 4, 5), and interact with the sound-absorbing elements 6. Due to the radial section 11, mating with the straight section 7, formed uniformly expanding from the ends of the housing to the bottom panel of the channels 8, the air flow smoothly changes its direction and passes through the holes in the lower panel 5. After that, the air flow enters the buffer section and is leveled, moving further along the path 12. noise of Tell is easy to manufacture and maintain.

The use of the present invention eliminates the straight-line propagation of sound waves and thereby provides a noise load within the permissible sanitary standards, reduces the resistance in the discharge path of the cooling system of a gas turbine installation.

Claims (2)

1. A silencer for the gas turbine plant tract, comprising a body in the form of a frame, sheathed with panels on the sides, from above, from below, sound-absorbing elements with a straight section, forming channels with panels, characterized in that a partition is installed inside the body that divides the internal cavity of the body into two parts made in the form of plates of sound-absorbing elements having a radial section mating with a straight section located in each part of the housing with the formation between the sound-absorbing elements, elements and panels and channels uniformly expanding from the ends of the housing to the bottom panel. 2. A silencer for the gas turbine installation duct according to claim 1, characterized in that the first sound-absorbing element from the bottom is made without a radial section.

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