Expansion absorption device and gas turbine exhaust system

Abstract

The invention belongs to the technical field of gas turbines, and discloses an expansion absorption device and a gas turbine exhaust system.The expansion absorption device comprises an expansion absorption main body, the expansion absorption main body comprises a flange connecting plate, a connecting flange piece and split partition plates installed between the flange connecting plate and the connecting flange piece, and expansion absorption sub-shells are installed between the split partition plates; an exhaust mechanism is arranged on one side of the connecting flange sheet; the problem that an exhaust system of an existing gas turbine cannot give consideration to the buffering performance, the energy conversion efficiency and the modular maintenance requirement is solved. Through the linkage design of the buffering air bag seat and the buffering air bag cushion, high-frequency impact and vibration can be absorbed by utilizing the self-adaptive adjustment function of air pressure, and part damage caused by stress concentration is avoided; the elastic exhaust sheet and the guide exhaust port cooperate to directionally guide airflow, turbulence loss is reduced, exhaust kinetic energy is efficiently converted into mechanical work of the rotating fan, and energy recovery efficiency is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of gas turbines, and particularly relates to an expansion absorption device and a gas turbine exhaust system. Background Art

[0002] The expansion absorption device in the gas turbine exhaust system traditionally relies on the bellows structure for displacement compensation and energy absorption. The bellows absorbs axial displacement and a small amount of lateral displacement through elastic deformation, but it has significant defects: 1. Limited buffering capacity: The dynamic impact generated by high-temperature and high-pressure exhaust is likely to cause stress concentration in the bellows, and fatigue cracks, deformation, and even fracture are likely to occur after long-term use, reducing the reliability of the system; 2. Low exhaust guiding efficiency: The bellows structure lacks a directional flow guiding design, and the exhaust energy is dispersed, unable to be effectively converted into utilizable mechanical work, resulting in energy waste; 3. High maintenance cost: The bellows is an integral structure, and local damage requires overall replacement, and the disassembly and assembly process is complex, resulting in a long downtime; Although there are improvement schemes in the prior art (such as multi-layer bellows or ribbed design), they still cannot balance the buffering performance, energy conversion efficiency, and modular maintenance requirements. Therefore, it is necessary to design an expansion absorption device and a gas turbine exhaust system to solve the above problems. Summary of the Invention

[0003] The purpose of the present invention is to provide an expansion absorption device and a gas turbine exhaust system to solve the problems mentioned in the above background art.

[0004] To achieve the above purpose, the present invention provides the following technical solution: An expansion absorption device and a gas turbine exhaust system, including an expansion absorption main body, the expansion absorption main body includes a flange connection plate, a connecting flange plate, and a split partition plate installed between the flange connection plate and the connecting flange plate. An expansion absorption sub-shell is installed between the split partition plates, and an exhaust mechanism is arranged on one side of the connecting flange plate; The expansion absorption sub-shell includes an outer sealing plate and an inner positioning plate. A gas guiding seat is welded and fixed between the outer sealing plate and the inner positioning plate. A gas guiding channel is installed inside the gas guiding seat. A buffer airbag seat is arranged outside the gas guiding channel. A buffer airbag pad is arranged on one side of the buffer airbag seat, and the buffer airbag seat and the buffer airbag pad are interconnected through a connecting pipe. A resilient exhaust piece is arranged on one side of the buffer airbag pad, and a guiding exhaust port is formed on the surface of the inner positioning plate; The resilient exhaust piece and the buffer airbag pad are symmetrically installed inside the gas guiding seat, and the positions of the opening on one side of the gas guiding channel and the guiding exhaust port correspond to the position of the resilient exhaust piece.

[0005] Preferably, a connecting support protrusion is provided on one side of the flange connecting plate and the connecting flange plate, and the outer sealing plate is fixedly installed on the connecting support protrusion through bolts.

[0006] Preferably, both ends of the split separator plate are welded and fixed to the flange connecting plate and the connecting flange plate. An air inlet pipe is provided on one side of the expansion absorption sub-shell, and an exhaust pipe is provided on one side of the flange connecting plate.

[0007] Preferably, air guiding vanes are provided inside the air guiding channel, and the lengths of the air guiding vanes increase in sequence.

[0008] Preferably, ventilation openings are provided on the surfaces of the split separator plate and the air guiding seat, and a sealing gasket is provided on one side of the air guiding seat.

[0009] Preferably, the exhaust mechanism includes an exhaust column installed on the flange connecting plate. Exhaust holes are provided on the surface of the exhaust column. A rotating seat is rotatably installed at one end of the exhaust column, and a rotating fan is fixedly installed on one side of the rotating seat.

[0010] Preferably, the inner cavity of the exhaust column is communicated with the exhaust pipe, and the exhaust holes are communicated with the inner cavity of the exhaust column.

[0011] Preferably, the orientation of the guiding exhaust port corresponds to the position of the rotating fan and is tangent to the outer edge of the rotating fan.

[0012] Preferably, the buffer airbag pad is fixedly attached to the inner wall of the air guiding seat, and both sides of the air guiding channel and the elastic exhaust piece are located between the buffer airbag pads.

[0013] Preferably, one end of the air inlet pipe is communicated with one end of the air guiding channel, and the expansion absorption sub-shells are communicated with each other through the air guiding channel.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. Through the linkage design of the buffer airbag seat and the buffer airbag pad, using the gas pressure self-adaptive adjustment function, high-frequency impacts and vibrations can be absorbed, avoiding component damage caused by stress concentration; the elastic exhaust piece and the guiding exhaust port cooperate with each other to direct the airflow, reduce turbulent flow loss, and at the same time efficiently convert the exhaust kinetic energy into the mechanical work of the rotating fan, improving the energy recovery efficiency.

[0015] 2. The split separator plate and the detachable expansion absorption sub-shell structure allow individual replacement of faulty components (such as the elastic exhaust piece or the buffer airbag seat) without overall disassembly, shortening the maintenance time and reducing the operation and maintenance costs.

[0016] 3. The length gradient arrangement of the air guide vanes and the optimized design of the air vent further balance the air flow distribution and reduce local wear; the buffer airbag pad fits the inner wall of the air guide seat, with the function of sound insulation and noise reduction, and the system operation noise is reduced; the standardized interface design of the flange connecting plate and the split partition plate is suitable for the exhaust systems of different models of gas turbines and supports rapid expansion and upgrade. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic structural diagram of the present invention; Figure 2 is a schematic inner structure diagram of the present invention; Figure 3 is a schematic side structure diagram of the expansion absorption sub-shell of the present invention; Figure 4 is a schematic installation structure diagram of the split partition plate of the present invention; Figure 5 is a schematic sub-shell structure diagram of the present invention; Figure 6 is a schematic buffer structure diagram of the present invention; Figure 7 is a schematic connection structure diagram of the present invention; In the figure: 1. Expansion absorption main body; 11. Flange connecting plate; 12. Split partition plate; 13. Connecting flange piece; 14. Inlet pipe; 15. Exhaust pipe; 16. Connecting support protrusion; 2. Expansion absorption sub-shell; 21. Outer sealing plate; 22. Inner positioning plate; 23. Air guide channel; 24. Air guide vane; 25. Elastic exhaust vane; 26. Air guide seat; 261. Sealing gasket; 262. Air vent; 27. Buffer airbag seat; 28. Buffer airbag pad; 29. Guide exhaust port; 3. Exhaust mechanism; 31. Exhaust column; 32. Exhaust hole; 33. Rotating seat; 34. Rotating fan. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0019] Embodiment 1: Please refer to Figures 1 to 7 , the present invention provides a technical solution: an expansion absorption device and a gas turbine exhaust system, including an expansion absorption main body 1, the expansion absorption main body 1 includes a flange connecting plate 11, a connecting flange piece 13, and a split partition plate 12 installed between the flange connecting plate 11 and the connecting flange piece 13. An expansion absorption sub-shell 2 is installed between the split partition plates 12, and an exhaust mechanism 3 is arranged on one side of the connecting flange piece 13; The expansion absorption sub-shell 2 includes an outer sealing plate 21 and an inner positioning plate 22. A gas guiding seat 26 is fixedly welded between the outer sealing plate 21 and the inner positioning plate 22. A gas guiding channel 23 is installed inside the gas guiding seat 26. A buffer airbag seat 27 is arranged outside the gas guiding channel 23. A buffer airbag pad 28 is arranged on one side of the buffer airbag seat 27. The buffer airbag seat 27 and the buffer airbag pad 28 are interconnected through a connecting pipe. A resilient exhaust piece 25 is arranged on one side of the buffer airbag pad 28. A guiding exhaust port 29 is formed on the surface of the inner positioning plate 22. When gas passes through the gas guiding channel 23, it is pressed against the buffer airbag seat 27 by the force, and the buffer airbag pad 28 is connected through the connecting pipe to be stressed and buffered, thereby reducing the impact received; The resilient exhaust piece 25 and the buffer airbag pad 28 are symmetrically installed inside the gas guiding seat 26. The positions of one opening of the gas guiding channel 23 and the guiding exhaust port 29 correspond to the position of the resilient exhaust piece 25. A gas guiding piece 24 is arranged inside the gas guiding channel 23, and the lengths of the gas guiding pieces 24 increase in sequence. During use, after being blocked and guided by the gas guiding piece 24, it blows towards the resilient exhaust piece 25, and the resilient exhaust piece 25 blows open and is guided through the guiding exhaust port 29 to blow towards the exhaust mechanism 3.

[0020] Further, refer to Figures 1 to 7 , ventilation openings 262 are formed on the surfaces of the split partition plate 12 and the gas guiding seat 26. A sealing gasket 261 is arranged on one side of the gas guiding seat 26. During use, it is convenient to seal the outside of the gas guiding seat 26, thereby making the ventilation more stable during use; the buffer airbag pad 28 is fixedly attached to the inner wall of the gas guiding seat 26, and both sides of the gas guiding channel 23 and the resilient exhaust piece 25 are located between the buffer airbag pads 28. During use, it is convenient for gas to flow into the buffer airbag pad 28 to be buffered when stressed; one end of the air inlet pipe 14 is communicated with one end of the gas guiding channel 23, and the expansion absorption sub-shells 2 are interconnected through the gas guiding channel 23. During use, it is convenient for ventilation and exhaust.

[0021] As can be seen from the above description, the present invention has the following beneficial effects: During use, it is buffered by the buffer airbag seat 27 supporting outside the gas guiding channel 23. The buffer airbag pad 28 is installed on one side of the buffer airbag seat 27. When the buffer airbag seat 27 is stressed, gas enters the buffer airbag pad 28 and presses on the resilient exhaust piece 25 at the same time, ensuring that the buffering effect can be further enhanced during use, and cooperating with the guiding exhaust port 29 to facilitate quickly guiding the discharge direction.

[0022] Embodiment 2: Please refer to Figures 1 to 7As shown in the figure, on the basis of the first embodiment, the present invention provides a technical solution: a connecting support protrusion 16 is provided on one side of the flange connecting plate 11 and the connecting flange plate 13, and the outer sealing plate 21 is fixedly installed on the connecting support protrusion 16 by bolts. During use, the outer sealing plate 21 can be conveniently and quickly connected through the connecting support protrusion 16, thus facilitating disassembly, maintenance, and replacement; both ends of the split partition plate 12 are welded and fixed to the flange connecting plate 11 and the connecting flange plate 13. An air inlet pipe 14 is provided on one side of the expansion absorption sub-shell 2, and an exhaust pipe 15 is provided on one side of the flange connecting plate 11, which is convenient for air intake and exhaust during use.

[0023] For the expansion absorption sub-shell 2 adopting the above technical solution, during use, the expansion absorption sub-shell 2 is separated and installed through the split partition plate 12. When components such as the elastic exhaust sheet 25 or the buffer airbag seat 27 in the expansion absorption sub-shell 2 malfunction after long-term use, the damaged part can be replaced, and there is no need to replace all of them, reducing the maintenance cost.

[0024] Further, reference can be made to Figures 1 to 7 , the exhaust mechanism 3 includes an exhaust column 31 installed on the flange connecting plate 11. Exhaust holes 32 are provided on the surface of the exhaust column 31. One end of the exhaust column 31 is rotatably installed with a rotating seat 33, and a rotating fan 34 is fixedly installed on one side of the rotating seat 33. During use, the rotating seat 33 is connected to the main shaft of the machine body, and the rotating fan 34 is rotatably installed on the exhaust column 31 through the rotating seat 33, and air is introduced into the exhaust column 31 through the exhaust holes 32; the inner cavity of the exhaust column 31 is communicated with the exhaust pipe 15, and the exhaust holes 32 are communicated with the inner cavity of the exhaust column 31, which is convenient for exhausting air outward during use. The orientation of the guiding exhaust port 29 corresponds to the position of the rotating fan 34 and is tangent to the outer edge of the rotating fan 34, which is convenient for driving the rotating fan 34 to rotate and converting air energy into mechanical energy during use.

[0025] For the exhaust mechanism 3 adopting the above technical solution, during use, the expansion absorption sub-shell 2 is separated through the cooperation of the exhaust column 31 and the split partition plate 12, and exhaust is carried out through the exhaust holes 32. Moreover, when exhausting, the rotating fan 34 and the rotating seat 33 are driven to rotate, thus converting the exhaust energy into mechanical work, which is more convenient during the conversion.

[0026] Working principle and usage process of the present invention: During use, the connecting flange 13 and screws are installed on the machine body. The intake pipe 14 intakes air into the expansion absorption main body 1, and then the gas enters the air guiding channel 23. After being blocked and guided by the air guiding piece 24, it blows towards the elastic exhaust piece 25. The air guiding channels 23 between the expansion absorption sub-cases 2 are ensured to communicate with each other through the ventilation ports 262. When the gas passes through the air guiding channel 23, it is pressed against the buffer airbag seat 27 by the force, and the buffer airbag pad 28 is connected through a connecting pipe to conduct force buffering, thereby reducing the impact received. Moreover, the gas blows open the elastic exhaust piece 25 and is guided by the guiding exhaust port 29 to blow towards the rotating fan 34 and the rotating seat 33, so that the rotating fan 34 rotates to convert the gas energy into mechanical work. The buffer airbag seat 27 can provide a certain sound insulation ability to reduce external noise while buffering on the outside. When a failure occurs during long-term use, the damaged expansion absorption sub-case 2 can be separately removed. When installing a new expansion absorption sub-case 2, the inner positioning plate 22 and the outer sealing plate 21 are supported between the split partition plates 12, and are sealed by fitting the sealing gasket 261 on the split partition plates 12, thereby ensuring stable use after installation.

[0027] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of additional identical elements in the process, method, article or device including the said element.

[0028] As described above, it is only used to illustrate the technical solution of the present invention and not to limit it. Other modifications or equivalent replacements made by those of ordinary skill in the art to the technical solution of the present invention, as long as they do not depart from the spirit and scope of the technical solution of the present invention, shall all be covered within the scope of the claims of the present invention.

Claims

1. An expansion absorption device and a gas turbine exhaust system, characterized in that: It includes an expansion absorption main body (1), and the expansion absorption main body (1) includes a flange connecting plate (11), a connecting flange piece (13), and a split partition plate (12) installed between the flange connecting plate (11) and the connecting flange piece (13). An expansion absorption sub-shell (2) is installed between the split partition plates (12), and an exhaust mechanism (3) is provided on one side of the connecting flange piece (13); The expansion absorption sub-shell (2) includes an outer sealing plate (21) and an inner positioning plate (22). A gas guiding seat (26) is fixedly welded between the outer sealing plate (21) and the inner positioning plate (22). A gas guiding channel (23) is installed inside the gas guiding seat (26). A buffer airbag seat (27) is provided on the outside of the gas guiding channel (23). A buffer airbag pad (28) is provided on one side of the buffer airbag seat (27), and the buffer airbag seat (27) and the buffer airbag pad (28) are interconnected through a connecting pipe. A resilient exhaust piece (25) is provided on one side of the buffer airbag pad (28), and a guiding exhaust port (29) is formed on the surface of the inner positioning plate (22); The resilient exhaust piece (25) and the buffer airbag pad (28) are symmetrically installed inside the gas guiding seat (26), and the positions of the one-side opening of the gas guiding channel (23) and the guiding exhaust port (29) correspond to the position of the resilient exhaust piece (25).

2. An expansion absorption device and a gas turbine exhaust system according to claim 1, characterized in that: Connecting support protrusions (16) are provided on one side of the flange connecting plate (11) and the connecting flange piece (13), and the outer sealing plate (21) is fixedly installed on the connecting support protrusions (16) by bolts.

3. An expansion absorption device and a gas turbine exhaust system according to claim 1, characterized in that: Both ends of the split partition plate (12) are fixedly welded to the flange connecting plate (11) and the connecting flange piece (13). An air inlet pipe (14) is provided on one side of the expansion absorption sub-shell (2), and an exhaust pipe (15) is provided on one side of the flange connecting plate (11).

4. An expansion absorption device and a gas turbine exhaust system according to claim 1, characterized in that: A gas guiding piece (24) is provided inside the gas guiding channel (23), and the lengths of the gas guiding pieces (24) increase in sequence.

5. An expansion absorption device and a gas turbine exhaust system according to claim 1, characterized in that: Vent holes (262) are formed on the surfaces of the split partition plate (12) and the gas guiding seat (26), and a sealing gasket (261) is provided on one side of the gas guiding seat (26).

6. An expansion absorption device and a gas turbine exhaust system according to claim 1, characterized in that: The exhaust mechanism (3) includes an exhaust column (31) installed on the flange connecting plate (11). Exhaust holes (32) are formed on the surface of the exhaust column (31). A rotating seat (33) is rotatably installed at one end of the exhaust column (31), and a rotating fan (34) is fixedly installed on one side of the rotating seat (33).

7. An expansion absorption device and a gas turbine exhaust system according to claim 6, characterized in that: The inner cavity of the exhaust column (31) is communicated with the exhaust pipe (15), and the exhaust holes (32) are communicated with the inner cavity of the exhaust column (31).

8. An expansion absorption device and a gas turbine exhaust system according to claim 6, characterized in that: The orientation of the guiding exhaust port (29) corresponds to the position of the rotating fan (34) and is tangent to the outer edge of the rotating fan (34).

9. An expansion absorption device and a gas turbine exhaust system according to claim 1, characterized in that: The buffer airbag pad (28) is fixedly attached to the inner wall of the gas guiding seat (26), and both sides of the gas guiding channel (23) and the resilient exhaust piece (25) are located between the buffer airbag pads (28).

10. An expansion absorption device and a gas turbine exhaust system according to claim 3, characterized in that: One end of the air inlet pipe (14) is communicated with one end of the gas guiding channel (23), and the expansion absorption sub-shells (2) are interconnected through the gas guiding channels (23).

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