Efficient steam exhaust silencer of steam turbine

Abstract

The utility model relates to the technical field of related technologies of steam turbines, and discloses an efficient steam exhaust silencer of a steam turbine. The efficient steam exhausting and silencing device of the steam turbine comprises a columnar barrel, supports distributed in an annular array mode are fixedly connected to the outer side of the columnar barrel, a first noise reduction assembly is arranged in the columnar barrel, and an air inlet flange pipe communicating with the first noise reduction assembly is fixedly connected to the bottom of the columnar barrel. The problems that a sound insulation wall is arranged in a noise reduction cylinder of the device and used for further reducing noise, however, when the device is used, gas exhausted by a steam turbine is high-temperature water vapor and gas corroding sound absorption materials, and the sound insulation wall is generally made of the sound absorption materials, so that the noise reduction effect is poor are solved. The problems that a sound absorption material is short in service life under the environment of high temperature, water vapor and gas corrosive to the sound absorption material, a sound insulation wall needs to be replaced frequently, and the sound insulation wall is inconvenient to replace in the prior art are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of steam turbine related technologies, in particular to a high-efficiency steam exhaust silencer for a steam turbine. Background Art

[0002] The exhaust device refers to a device installed after the turbine exhaust cylinder to discharge the exhaust gas and has the functions of cooling and silencing. The exhaust device of the engine refers to the component that organizes the exhaust after the turbine or afterburner. The composition and structural scheme of the exhaust device depend on the type and purpose of the engine and aircraft. The exhaust device includes the tail nozzle, reverse thrust device, silencer, etc. The tail nozzle is an indispensable part of the engine, and other exhaust devices are set according to the special needs of the engine and aircraft. The exhaust device of the steam turbine is to discharge the gas generated inside the steam turbine turbine.

[0003] As disclosed in publication number CN209369884U, an exhaust device for a steam turbine is proposed, comprising a noise reduction cylinder and a handle, wherein the side of the noise reduction cylinder is fixedly connected with a handle, the lower part of the noise reduction cylinder is fixedly connected with a support leg, the bottom of the support leg is fixedly connected with a base, the bottom of the noise reduction cylinder is fixedly connected with a connecting channel, and the steam turbine exhaust device is fixedly connected with the noise reduction cylinder at the top of the connecting channel through which the airflow passes. When the gas inside the turbine enters the noise reduction cylinder from the airflow passage, the sound insulation wall on the inner surface of the cylinder has a certain effect of reducing noise, and then the airflow passes upward through multiple layers of resistive sound sheets, which are acoustic flow structures, and improve the sound absorption performance by using curved sound absorption and changes in the thickness of the channel sound absorption layer, so that the resistance of the airflow becomes smaller, thereby achieving the effect of sound absorption, and the noise of the exhaust gas from the steam turbine becomes very small, the staff can better carry out debugging and maintenance work, and it is also ensured that the staff's body will not be harmed.

[0004] A soundproof wall is arranged inside the noise reduction cylinder of the device, and the soundproof wall is used to further reduce noise. However, when the device is in use, the gas exhausted by the steam turbine is high-temperature water vapor and gas corrosive to the sound-absorbing material. The soundproof wall is generally made of sound-absorbing material. The service life of the sound-absorbing material is short in an environment of high temperature, water vapor and gas corrosive to the sound-absorbing material, and then the soundproof wall needs to be replaced frequently. The device is not convenient for replacing the soundproof wall, so a high-efficiency steam exhaust silencer for a steam turbine is proposed to solve the above problem. Utility Model Content

[0005] 1. Technical issues to be resolved

[0006] In view of the deficiencies in the prior art, the utility model provides a high-efficiency exhaust silencer for a steam turbine, which has the advantages of easy replacement of sound insulation walls, etc., and solves the problem that a sound insulation wall is arranged in the noise reduction cylinder of the device, and the sound insulation wall is used to further reduce the noise. However, when the device is in use, the gas exhausted by the steam turbine is high-temperature water vapor and gas that is corrosive to sound-absorbing materials. The sound insulation wall is generally made of sound-absorbing materials. The service life of the sound-absorbing materials is short in an environment of high temperature, water vapor and gas that is corrosive to the sound-absorbing materials, and then the sound insulation wall needs to be replaced frequently. The problem that the device is not convenient for replacing the sound insulation wall.

[0007] (II) Technical solution

[0008] The utility model provides a technical solution to the above-mentioned technical problems as follows: a high-efficiency exhaust silencer for a steam turbine, comprising a cylindrical barrel, the outer side of the cylindrical barrel is fixedly connected with brackets distributed in an annular array, a first noise reduction component is arranged inside the cylindrical barrel, the bottom of the cylindrical barrel is fixedly connected with an intake flange pipe connected with the first noise reduction component, the top of the cylindrical barrel is fixedly connected with an exhaust pipe connected with the first noise reduction component, an annular hole matching the first noise reduction component is opened on the top of the cylindrical barrel, a sealing component is arranged inside the annular hole, a slide groove symmetrically distributed in left and right directions is fixedly connected to the top of the cylindrical barrel, the opposite side of the slide groove is provided with the same second noise reduction component extending to the inside of the cylindrical barrel through the annular hole, the second noise reduction component is tightly fitted with the sealing component, and the outer side of the cylindrical barrel is rotatably connected with an internal threaded ring threadedly connected to the second noise reduction component.

[0009] The beneficial effect of the utility model is that the air intake flange pipe of the device is fixedly connected to the exhaust pipe of the turbine by bolts, when the gas exhausted by the turbine enters the first noise reduction component through the air intake flange pipe, the sound waves carried by the gas gradually decay in the first noise reduction component, the gas is discharged through the exhaust pipe, part of the sound waves penetrate the first noise reduction component and are then absorbed by the second noise reduction component, thereby achieving the purpose of noise reduction, when the second noise reduction component is aged and needs to be replaced, by rotating the internal threaded ring, the force generated by the rotation of the thread drives the second noise reduction component to move upward, and at the same time, the second noise reduction component slides upward in the slide groove, and the second noise reduction component is separated from the sealing component until the second noise reduction component can be lifted out of the annular hole, and the second noise reduction component can be replaced.

[0010] The high-efficiency steam exhaust silencer for steam turbine has the advantage of easy replacement of the sound insulation wall.

[0011] On the basis of the above technical solution, the present invention can also be improved as follows.

[0012] Furthermore, the first noise reduction component includes a porous noise reduction cylinder and a porous plate, the interior of the cylindrical cylinder is fixedly connected with a porous noise reduction cylinder connected to both the intake flange pipe and the exhaust pipe, and the interior of the porous noise reduction cylinder is fixedly connected with porous plates distributed at equal vertical distances;

[0013] Furthermore, the second noise reduction component includes a slide rail, an externally threaded ring and a sound-absorbing tube. The opposite sides of the slide groove are slidably connected to the slide rail, and the opposite sides of the slide rail are fixedly connected to the same externally threaded ring. The outer side of the externally threaded ring is tightly fitted with the first sealing ring and the second sealing ring. The bottom of the externally threaded ring is fixedly connected to the sound-absorbing tube that extends into the columnar tube through the annular hole. The sound-absorbing tube is made of glass wool, and the internally threaded ring is threadedly connected to the externally threaded ring.

[0014] The beneficial effect of adopting the above further scheme is that when the gas exhausted by the turbine enters the porous noise reduction cylinder through the air inlet flange pipe, the sound waves pass through the porous plate, the porous plate divides the sound waves, and the divided sound waves collide and then attenuate the sound waves, and part of the sound waves pass through the porous noise reduction cylinder and are absorbed by the sound absorbing cylinder, thereby achieving the purpose of noise reduction. When the sound absorbing cylinder needs to be replaced due to aging, the internal threaded ring is rotated, and the force generated by the rotation of the thread drives the external threaded ring to move upward. At the same time, the slide rail slides upward in the slide groove, and the external threaded ring is separated from the first sealing ring and the second sealing ring until the sound absorbing cylinder can be lifted out of the annular hole, and the sound absorbing cylinder can be replaced.

[0015] Furthermore, the sealing assembly includes a first sealing ring and a second sealing ring. The top of the cylindrical tube is provided with an annular hole coaxial with the porous noise reduction tube. The inner hole wall of the annular hole is fixedly connected with the first sealing ring, and the outer hole wall of the annular hole is fixedly connected with the second sealing ring adapted to the first sealing ring.

[0016] The beneficial effect of adopting the above further solution is that the first sealing ring fits tightly with the second sealing ring and the external threaded ring, thereby preventing noise from escaping from the gap. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the utility model;

[0018] Figure 2 This is a partial cross-sectional view of the porous noise reduction tube of the utility model;

[0019] Figure 3 This is a schematic diagram of the structure of the second noise reduction component of the utility model;

[0020] Figure 4 This is a top view of the structure of the second noise reduction component of the utility model;

[0021] Figure 5 This is a top view of the slide structure of the utility model;

[0022] Figure 6 It is an enlarged schematic diagram of the structure at point a of the utility model.

[0023] In the figure: 1. cylindrical tube; 2. bracket; 3. first noise reduction component; 301. porous noise reduction tube; 302. porous plate; 4. air intake flange pipe; 5. exhaust pipe; 6. annular hole; 7. sealing component; 701. first sealing ring; 702. second sealing ring; 8. slide groove; 9. second noise reduction component; 901. slide rail; 902. external threaded ring; 903. sound absorbing tube; 10. internal threaded ring. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] In the embodiment, Figure 1-6 A high-efficiency exhaust silencer for a steam turbine is provided. The utility model comprises a cylindrical barrel 1, the outer side of the cylindrical barrel 1 is fixedly connected with a bracket 2 distributed in an annular array, the interior of the cylindrical barrel 1 is provided with a first noise reduction component 3, the bottom of the cylindrical barrel 1 is fixedly connected with an intake flange pipe 4 connected with the first noise reduction component 3, the top of the cylindrical barrel 1 is fixedly connected with an exhaust pipe 5 connected with the first noise reduction component 3, the top of the cylindrical barrel 1 is provided with an annular hole 6 adapted to the first noise reduction component 3, the inside of the annular hole 6 is provided with a sealing component 7, the top of the cylindrical barrel 1 is fixedly connected with a slide groove 8 distributed in a left-right symmetrical manner, the opposite side of the slide groove 8 is provided with the same second noise reduction component 9 extending to the inside of the cylindrical barrel 1 through the annular hole 6, the second noise reduction component 9 is tightly fitted with the sealing component 7, and the outer side of the cylindrical barrel 1 is rotatably connected with an internal threaded collar 10 threadedly connected with the second noise reduction component 9;

[0026] The first noise reduction component 3 includes a porous noise reduction cylinder 301 and a porous plate 302. The interior of the cylindrical cylinder 1 is fixedly connected with a porous noise reduction cylinder 301 which is in communication with both the intake flange pipe 4 and the exhaust pipe 5. The interior of the porous noise reduction cylinder 301 is fixedly connected with porous plates 302 which are distributed vertically at equal distances.

[0027] The second noise reduction component 9 includes a slide rail 901, an externally threaded ferrule 902 and a sound absorbing tube 903. The opposite sides of the slide groove 8 are slidably connected with the slide rail 901. The opposite sides of the slide rail 901 are fixedly connected with the same externally threaded ferrule 902. The outer side of the externally threaded ferrule 902 is tightly fitted with the first sealing ring 701 and the second sealing ring 702. The bottom of the externally threaded ferrule 902 is fixedly connected with a sound absorbing tube 903 extending into the columnar tube 1 through the annular hole 6. The sound absorbing tube 903 is made of glass wool. The internally threaded ferrule 10 is threadedly connected with the externally threaded ferrule 902.

[0028] When the gas exhausted by the steam turbine enters the porous noise reduction tube 301 through the air inlet flange pipe 4, the sound waves pass through the porous plate 302, the porous plate 302 divides the sound waves, and the divided sound waves collide and then attenuate the sound waves, and part of the sound waves pass through the porous noise reduction tube 301 and are absorbed by the sound absorbing tube 903, so that the purpose of noise reduction can be achieved. When the sound absorbing tube 903 needs to be replaced due to aging, the internal threaded ring 10 is rotated, and the force generated by the rotation of the thread drives the external threaded ring 902 to move upward. At the same time, the slide rail 901 slides upward in the slide groove 8, and the external threaded ring 902 is separated from the first sealing ring 701 and the second sealing ring 702 until the sound absorbing tube 903 can be lifted out of the annular hole 6, and the sound absorbing tube 903 can be replaced.

[0029] The sealing assembly 7 includes a first sealing ring 701 and a second sealing ring 702. The top of the cylindrical tube 1 is provided with an annular hole 6 coaxial with the porous noise reduction tube 301. The inner hole wall of the annular hole 6 is fixedly connected with the first sealing ring 701, and the outer hole wall of the annular hole 6 is fixedly connected with the second sealing ring 702 adapted to the first sealing ring 701.

[0030] The first sealing ring 701 fits tightly with the second sealing ring 702 and the external threaded ring 902 to prevent noise from escaping from the gap.

[0031] Working principle:

[0032] The first step: the air inlet flange pipe 4 of the device is fixedly connected to the exhaust pipe of the steam turbine by bolts. When the gas discharged from the steam turbine enters the porous noise reduction tube 301 through the air inlet flange pipe 4, the sound waves pass through the porous plate 302, the porous plate 302 divides the sound waves, and the divided sound waves collide to attenuate the sound waves. Part of the sound waves pass through the porous noise reduction tube 301 and are absorbed by the sound absorbing tube 903, so that the purpose of noise reduction can be achieved, and the gas is discharged through the exhaust pipe 5;

[0033] Step 2: When the sound absorbing tube 903 needs to be replaced due to aging, the internal threaded ring 10 is rotated, and the force generated by the rotation of the thread drives the external threaded ring 902 to move upward. At the same time, the slide rail 901 slides upward in the slide groove 8, and the external threaded ring 902 is separated from the first sealing ring 701 and the second sealing ring 702 until the sound absorbing tube 903 can be lifted out of the annular hole 6, and the sound absorbing tube 903 can be replaced;

[0034] Step 3: When the device is in use, the first sealing ring 701 fits tightly with the second sealing ring 702 and the external threaded ring 902 to prevent noise from escaping from the gap.

[0035] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0036] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high-efficiency steam exhaust silencer for a steam turbine, comprising a cylindrical tube (1), characterized in that: The outer side of the cylindrical barrel (1) is fixedly connected to a bracket (2) distributed in an annular array, the interior of the cylindrical barrel (1) is provided with a first noise reduction component (3), the bottom of the cylindrical barrel (1) is fixedly connected to an intake flange pipe (4) connected to the first noise reduction component (3), the top of the cylindrical barrel (1) is fixedly connected to an exhaust pipe (5) connected to the first noise reduction component (3), the top of the cylindrical barrel (1) is provided with an annular hole (6) adapted to the first noise reduction component (3), the inside of the annular hole (6) is provided with a sealing component (7), the top of the cylindrical barrel (1) is fixedly connected to a slide groove (8) distributed in a left-right symmetrical manner, the opposite side of the slide groove (8) is provided with a second noise reduction component (9) extending through the annular hole (6) to the inside of the cylindrical barrel (1), the second noise reduction component (9) is tightly fitted with the sealing component (7), and the outer side of the cylindrical barrel (1) is rotatably connected to an internal threaded ring (10) threadedly connected to the second noise reduction component (9).

2. A steam turbine high-efficiency exhaust silencer according to claim 1, characterized in that: The first noise reduction component (3) comprises a porous noise reduction cylinder (301) and a porous plate (302); the interior of the columnar cylinder (1) is fixedly connected to a porous noise reduction cylinder (301) which is in communication with both the air intake flange pipe (4) and the exhaust pipe (5); the interior of the porous noise reduction cylinder (301) is fixedly connected to porous plates (302) which are distributed at equal distances in the vertical direction.

3. A steam turbine high-efficiency exhaust silencer according to claim 2, characterized in that: The sealing assembly (7) comprises a first sealing ring (701) and a second sealing ring (702); the top of the columnar tube (1) is provided with an annular hole (6) coaxial with the porous noise reduction tube (301); the inner hole wall of the annular hole (6) is fixedly connected with the first sealing ring (701); the outer hole wall of the annular hole (6) is fixedly connected with the second sealing ring (702) adapted to the first sealing ring (701).

4. A steam turbine high-efficiency exhaust silencer according to claim 3, characterized in that: The second noise reduction component (9) comprises a slide rail (901), an externally threaded ring (902) and a sound absorbing tube (903); the opposite sides of the slide groove (8) are slidably connected to the slide rail (901); the opposite sides of the slide rail (901) are fixedly connected to the same externally threaded ring (902); the outer side of the externally threaded ring (902) is tightly fitted with the first sealing ring (701) and the second sealing ring (702); the bottom of the externally threaded ring (902) is fixedly connected to the sound absorbing tube (903) extending into the columnar tube (1) through the annular hole (6); the sound absorbing tube (903) is made of glass wool; the internally threaded ring (10) is threadedly connected to the externally threaded ring (902).

Images