Noise reduction hood of gas turbine

Abstract

The utility model discloses a gas turbine noise reduction hood which comprises a noise reduction shell and a fixed shell, an installation shell and a box type silencer are arranged on the inner wall of the noise reduction shell, a plurality of air inducing mechanisms used for inducing air are arranged in the installation shell, and each air inducing mechanism comprises an installation frame arranged in the installation shell. A filling layer is arranged in the mounting frame, a plurality of inner walls of the mounting frame are jointly provided with an air inducing conical cylinder through a plurality of connecting rods, and an air inlet pipe communicated with the interior of the mounting shell is arranged on the mounting shell. Due to the fact that the air inducing mechanism is arranged, air entering the unit can be sucked in from the multiple air inducing conical cylinders, the sectional areas of the air inducing conical cylinders are gradually reduced, airflow is gradually accelerated in the entering process, and therefore vortex generation is reduced, the air inducing conical cylinders are like a horn mouth, and the small opening end faces the air inlet direction. Smooth airflow flowing can reduce noise generated by airflow turbulence, and then the noise reduction effect of the hood is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of gas turbine noise reduction covers, in particular to a gas turbine noise reduction cover. Background Art

[0002] Heavy-duty gas turbines have the advantages of saving energy, improving the environment, providing electricity, improving the quality of heating, reducing the labor intensity of workers in decentralized boiler rooms and saving construction land, and have good economic benefits.

[0003] During the operation of the gas turbine generator set, it will generate noise close to 133dB, which seriously affects the working environment of the power plant and endangers human health. The noise control method of the gas turbine generator set is mainly to use a soundproof cover for the unit body and to silence the air inlet. The air inlet of the existing noise reduction cover is mostly rectangular or rectangular. The corners of the rectangular or rectangular air inlet are relatively sharp. When the airflow passes through these corners, it is easy to produce a sharp change in direction and separation, thereby forming turbulence and vortexes. This unsmooth airflow will increase the generation of noise. For example, when the air enters the rectangular air inlet, the flow velocity at the corner will suddenly change, resulting in an increase in local pressure fluctuations, which in turn causes stronger noise. Therefore, it is necessary to design a gas turbine noise reduction cover to solve the above problems. Utility Model Content

[0004] The utility model aims to solve the shortcomings in the prior art and proposes a gas turbine noise reduction cover.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A gas turbine noise reduction hood comprises a noise reduction shell and a fixed shell, wherein the inner wall of the noise reduction shell is provided with a mounting shell and a box-type silencer, wherein the mounting shell is provided with a plurality of induced draft mechanisms for introducing air, wherein the induced draft mechanisms comprise a mounting frame arranged in the mounting shell, wherein a filling layer is provided in the mounting frame, wherein a plurality of inner walls of the mounting frame are provided with an induced draft cone cylinder through a plurality of connecting rods, wherein the mounting shell is provided with an air intake pipe connected with the interior thereof, and a moving mechanism for moving the fixed shell and the box-type silencer is provided under the mounting shell and the box-type silencer.

[0007] Preferably, the moving mechanism comprises a plurality of sliding frames arranged at the lower end of the mounting shell and the box-type silencer, a plurality of first rollers are arranged in the sliding frames, and a plurality of fixed slide rails are fixedly connected to the bottom of the noise reduction shell.

[0008] Preferably, a connecting pipe is provided in communication with the side wall of the air-inducing cone, and the cross section of the connecting pipe is a serpentine structure.

[0009] Preferably, a second noise reduction body is provided on the side wall of the air induced cone, and a plurality of cassette filters are provided on the side wall of the box-type silencer.

[0010] Preferably, a carbon dioxide fire extinguishing cylinder cabinet and an electrical box are provided in the fixed shell, a plurality of combustible gas sensors and smoke alarms are provided on the top of the noise reduction shell and the fixed shell, the lower ends of the carbon dioxide fire extinguishing cylinder cabinet and the electrical box are fixedly connected with a mounting plate, and a plurality of second rollers are provided at the lower end of the mounting plate.

[0011] Preferably, two electric slide rails are fixedly connected to the bottom of the fixed housing, an electric slide rail is provided with an electric slider, and the side wall of the electric slider is fixedly connected to the side wall of the adjacent mounting plate.

[0012] The utility model has the following beneficial effects:

[0013] 1. This device is equipped with an air induction mechanism. The air entering the unit will first be sucked in from multiple air induction cones. As the cross-sectional area of ​​the air induction cones gradually decreases, the airflow gradually accelerates during the entry process, thereby reducing the generation of vortices. It is like a trumpet mouth with the small mouth facing the air intake direction. The smooth airflow can reduce the noise caused by air flow turbulence, thereby further reducing the noise of the hood;

[0014] 2. The device is provided with a moving mechanism, which can move the mounting shell and the box-type silencer through the first roller, making it easier to repair and replace the mounting shell, the cassette filter and the box-type silencer;

[0015] 3. The device is equipped with a carbon dioxide fire extinguishing cylinder cabinet and a combustible gas sensor, etc., so that the equipment has the functions of combustible gas monitoring, fire detection and fire extinguishing, thereby improving the practicality of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic structural diagram of a gas turbine noise reduction cover proposed by the utility model;

[0017] Figure 2 for Figure 1 A magnified view of the structure at A;

[0018] Figure 3 A side view of a gas turbine noise reduction hood proposed by the utility model;

[0019] Figure 4 This is another side view of the gas turbine noise reduction cover proposed by the utility model.

[0020] In the figure: 1 noise reduction shell, 2 fixed shell, 3 combustible gas sensor, 4 installation shell, 5 first noise reduction body, 6 sliding frame, 7 first roller, 8 fixed slide rail, 9 box silencer, 10 induced draft cone, 11 second noise reduction body, 12 filling layer, 13 installation frame, 14 connecting pipe, 15 cassette filter, 16 electric slide rail, 17 carbon dioxide fire extinguishing cylinder cabinet, 18 electrical box, 19 air intake pipe, 20 installation plate, 21 electric slider, 22 second roller. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0022] Reference Figure 1-4 A gas turbine noise reduction hood comprises a noise reduction shell 1 and a fixed shell 2. The front and rear side walls of the noise reduction shell 1 are provided with a plurality of mounting ears, which are not shown in the figure. The inner wall of the noise reduction shell 1 is provided with a mounting shell 4 and a box-type silencer 9. The mounting shell 4 is provided with a plurality of induced draft mechanisms for introducing air. The induced draft mechanisms comprise a mounting frame 13 arranged in the mounting shell 4. A filling layer 12 is provided in the mounting frame 13. A plurality of inner walls of the mounting frame 13 are provided with an induced draft cone 10 through a plurality of connecting rods. The mounting shell 4 is provided with an air intake pipe 19 connected with the interior thereof.

[0023] A moving mechanism for moving the fixed shell 2 and the box-type silencer 9 is provided under the mounting shell 4 and the box-type silencer 9, and the moving mechanism includes a plurality of sliding frames 6 arranged at the lower ends of the mounting shell 4 and the box-type silencer 9, a plurality of first rollers 7 are provided in the sliding frames 6, and a plurality of fixed slide rails 8 are fixedly connected to the bottom of the noise reduction shell 1 (the actual left side of the fixed slide rail 8 is located on the left side of the noise reduction shell 1, and the length is reduced in the figure to show the sliding frames 6 and the first rollers 7).

[0024] In the utility model, a connecting pipe 14 is connected to the side wall of the air induced cone 10. The cross section of the connecting pipe 14 is a serpentine structure. Through appropriate bending design, the direction of the airflow can be changed to make it enter more smoothly and reduce direct impact and turbulence.

[0025] In the utility model, the side wall of the air induced cone 10 is provided with a second noise reduction body 11, which can further reduce noise. The side wall of the box-type silencer 9 is provided with a plurality of cassette filters 15, and the cassette filters 15 can achieve a dustproof effect.

[0026] In the utility model, a carbon dioxide fire extinguishing cylinder cabinet 17 and an electrical box 18 (AC / DC cabinet, VFD and DC battery cabinet) are provided in the fixed shell 2, and a plurality of combustible gas sensors 3 and smoke alarms are provided on the top of the noise reduction shell 1 and the fixed shell 2, so that the equipment has a carbon dioxide fire extinguishing system, and an alarm is provided on the side wall of the noise reduction shell 1 (not shown in the figure), and the lower ends of the carbon dioxide fire extinguishing cylinder cabinet 17 and the electrical box 18 are fixedly connected to a mounting plate 20, and a plurality of second rollers 22 are provided at the lower end of the mounting plate 20, so that the carbon dioxide fire extinguishing cylinder cabinet 17 and the electrical box 18 can be extended out of the equipment for easy operation.

[0027] In the utility model, two electric slide rails 16 are fixedly connected to the bottom of the fixed shell 2, and an electric slider 21 is provided on the electric slide rail 16. The side wall of the electric slider 21 is fixedly connected to the side wall of the adjacent mounting plate 20, so that the extension of the carbon dioxide fire extinguishing cylinder cabinet 17 and the electrical box 18 is more automated.

[0028] When in use, the noise reduction housing 1 is installed on the generator set base by bolts, and the air intake pipe 19 is connected to the generator set air intake pipe. When the generator set is started, the outside air is sucked in from the left side of the noise reduction housing 1, and then the air is sucked in from multiple induced draft cones 10, and then passes through the box-type silencer 9 to filter the noise, and finally enters the generator. The cross-sectional area of ​​the induced draft cone 10 gradually decreases, so that the airflow gradually accelerates during the entry process, thereby reducing the generation of vortices, just like a trumpet mouth, with the small mouth end facing the air intake direction, and the smooth airflow can reduce the noise caused by airflow turbulence;

[0029] The air flowing out of the air induced cone 10 passes through the connecting pipe 14 again. The proper bending design of the connecting pipe 14 can change the direction of the airflow, allowing it to enter more smoothly, reduce direct impact and turbulence, and further reduce noise decibels.

[0030] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and practical concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A gas turbine noise reduction cover, comprising a noise reduction housing (1) and a fixed housing (2), characterized in that: The inner wall of the noise reduction shell (1) is provided with a mounting shell (4) and a box-type silencer (9); the mounting shell (4) is provided with a plurality of air induction mechanisms for introducing air; the air induction mechanisms include a mounting frame (13) arranged in the mounting shell (4); a filling layer (12) is provided in the mounting frame (13); a plurality of inner walls of the mounting frame (13) are connected to an air induction cone (10) via a plurality of connecting rods; an air intake pipe (19) communicating with the interior of the mounting shell (4) is provided on the mounting shell (4); and a moving mechanism for moving the fixed shell (2) and the box-type silencer (9) is provided below the mounting shell (4) and the box-type silencer (9).

2. The gas turbine noise reduction cover according to claim 1, characterized in that: The moving mechanism comprises a plurality of sliding frames (6) arranged at the lower ends of the mounting shell (4) and the box-type silencer (9), a plurality of first rollers (7) being arranged in the sliding frames (6), and a plurality of fixed slide rails (8) being fixedly connected to the bottom of the noise reduction shell (1).

3. The gas turbine noise reduction cover according to claim 2, characterized in that: A connecting pipe (14) is provided in communication with the side wall of the air-inducing cone (10), and the cross section of the connecting pipe (14) is a serpentine structure.

4. The gas turbine noise reduction cover according to claim 3, characterized in that: The side wall of the air induction cone (10) is provided with a second noise reduction body (11), and the side wall of the box-type silencer (9) is provided with a plurality of box-type filters (15).

5. The gas turbine noise reduction cover according to claim 4, characterized in that: A carbon dioxide fire extinguishing cylinder cabinet (17) and an electrical box (18) are arranged in the fixed shell (2); a plurality of combustible gas sensors (3) and a smoke alarm are arranged on the top of the noise reduction shell (1) and the fixed shell (2); a mounting plate (20) is fixedly connected to the lower ends of the carbon dioxide fire extinguishing cylinder cabinet (17) and the electrical box (18); a plurality of second rollers (22) are arranged at the lower end of the mounting plate (20).

6. The gas turbine noise reduction cover according to claim 5, characterized in that: Two electric slide rails (16) are fixedly connected to the bottom of the fixed housing (2), an electric slide rail (16) is provided with an electric slider (21), and a side wall of the electric slider (21) is fixedly connected to a side wall of an adjacent mounting plate (20).

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