Expansion absorption device and gas turbine exhaust system

Abstract

The present invention belongs to the technical field of gas turbines and discloses an expansion absorption device and a gas turbine exhaust system, including an expansion absorption main body, the expansion absorption main body including a flange connecting plate, a connecting flange sheet, a split partition plate installed between the flange connecting plate and the connecting flange sheet, an expansion absorption shell installed between the split partition plates, and an exhaust mechanism provided on one side of the connecting flange sheet; the problem solved by the present invention is that the exhaust system of the current gas turbine cannot take into account the buffering performance, energy conversion efficiency and modular maintenance requirements; the present invention utilizes the gas pressure adaptive adjustment function through the linkage design of the buffer airbag seat and the buffer airbag cushion to absorb high-frequency impact and vibration, and avoid component damage caused by stress concentration; the elastic exhaust sheet and the guide exhaust port work together to directionally guide the airflow, reduce turbulence loss, and at the same time efficiently convert the exhaust kinetic energy into the mechanical work of the rotating fan, thereby improving the energy recovery efficiency.

Description

Technical Field

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

[0002] Expansion absorption devices in gas turbine exhaust systems traditionally rely on bellows structures for displacement compensation and energy absorption. Bellows absorb axial displacement and a small amount of lateral displacement through elastic deformation, but they have significant drawbacks:

[0003] 1. Limited buffering capacity: The dynamic impact generated by high-temperature and high-pressure exhaust easily leads to stress concentration in the bellows, which is prone to fatigue cracks, deformation, and even breakage after long-term use, reducing system reliability;

[0004] 2. Low exhaust guidance efficiency: The bellows structure lacks a directional flow guidance design, which disperses the exhaust energy and cannot be effectively converted into usable mechanical work, resulting in energy waste;

[0005] 3. High maintenance cost: The bellows is an integral structure. If it is partially damaged, it needs to be replaced as a whole. The disassembly and assembly process is complicated, resulting in long downtime.

[0006] Although there are improvement solutions in the existing technology (such as multi-layer bellows or reinforcement rib design), it is still impossible to take into account 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

[0007] The object of the present invention is to provide an expansion absorption device and a gas turbine exhaust system to solve the problems raised in the above background technology.

[0008] To achieve the above objectives, the present invention provides the following technical solutions: an expansion absorption device and a gas turbine exhaust system, comprising an expansion absorption body, the expansion absorption body comprising a flange connection plate, a connection flange sheet, and a split partition plate installed between the flange connection plate and the connection flange sheet, an expansion absorption subshell installed between the split partition plates, and an exhaust mechanism provided on one side of the connection flange sheet;

[0009] The expansion absorption subshell includes an outer sealing plate and an inner positioning plate, an air guide seat is welded and fixed between the outer sealing plate and the inner positioning plate, an air guide channel is installed on the inner side of the air guide seat, a buffer airbag seat is provided on the outer side of the air guide channel, a buffer airbag cushion is provided on one side of the buffer airbag seat, and the buffer airbag seat and the buffer airbag cushion are connected to each other through a connecting pipe, an elastic exhaust sheet is provided on one side of the buffer airbag cushion, and a guide exhaust port is opened on the surface of the inner positioning plate;

[0010] The elastic exhaust sheet and the buffer airbag cushion are both symmetrically mounted on the inner side of the air guide seat, and the positions of one side opening of the air guide channel and the guide exhaust port both correspond to the positions of the elastic exhaust sheet.

[0011] Preferably, a connection support protrusion is provided on one side of the flange connection plate and the connection flange sheet, and the outer sealing plate is fixedly mounted on the connection support protrusion by means of bolts.

[0012] Preferably, both ends of the split partition plate are welded and fixed to the flange connecting plate and the connecting flange sheet, an air inlet pipe is provided on one side of the expansion and absorption sub-shell, and an exhaust pipe is provided on one side of the flange connecting plate.

[0013] Preferably, air guide plates are provided on the inner side of the air guide channel, and the lengths of the air guide plates increase successively.

[0014] Preferably, the surfaces of the split partition plate and the air guide seat are both provided with air vents, and a sealing gasket is provided on one side of the air guide seat.

[0015] Preferably, the exhaust mechanism includes an exhaust column mounted on the flange connecting plate, an exhaust hole is opened on the surface of the exhaust column, a rotating seat is rotatably mounted on one end of the exhaust column, and a rotating fan is fixedly mounted on one side of the rotating seat.

[0016] Preferably, the inner cavity of the exhaust column is communicated with the exhaust pipe, and the exhaust hole is communicated with the inner cavity of the exhaust column.

[0017] Preferably, the orientation of the guide exhaust port corresponds to the position of the rotating fan and is tangent to the outer edge of the rotating fan.

[0018] Preferably, the buffer airbag cushion is fitted and fixed on the inner wall of the air guide seat, and both sides of the air guide channel and the elastic exhaust sheet are located between the buffer airbag cushion.

[0019] Preferably, one end of the air intake pipe is connected to one end of the air guide channel, and the expansion and absorption sub-shells are connected to each other through the air guide channel.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. The linkage design of the airbag seat and cushion, and the adaptive adjustment of gas pressure, absorb high-frequency shock and vibration, avoiding component damage caused by stress concentration. The elastic exhaust flap and the guide exhaust port work together to guide the airflow in a targeted manner, reducing turbulence losses. At the same time, the exhaust kinetic energy is efficiently converted into mechanical work of the rotating fan, improving energy recovery efficiency.

[0022] 2. The split partition plate and detachable expansion absorption shell structure allow for individual replacement of faulty components (such as elastic exhaust panels or cushioning airbag seats) without the need for complete disassembly, shortening maintenance time and reducing operation and maintenance costs.

[0023] 3. The gradient arrangement of the air guide vanes and the optimized design of the vents further balance the airflow distribution and reduce local wear. The cushioning airbag fits closely to the inner wall of the air guide seat, providing both sound insulation and noise reduction functions, thereby reducing system operating noise. The standardized interface design of the flange connecting plate and the split partition plate adapts to the exhaust systems of different gas turbine models and supports rapid expansion and upgrades. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of the present invention;

[0025] Figure 2 This is a schematic diagram of the inner structure of the present invention;

[0026] Figure 3 This is a schematic structural diagram of one side of the expansion absorption sub-shell of the present invention;

[0027] Figure 4 This is a schematic diagram of the installation structure of the split partition plate of the present invention;

[0028] Figure 5 It is a schematic diagram of the split shell structure of the present invention;

[0029] Figure 6 Schematic diagram of the buffer structure of the present invention;

[0030] Figure 7 Schematic diagram of the connection structure of the present invention;

[0031] In the figure: 1. Expansion absorption main body; 11. Flange connecting plate; 12. Split partition plate; 13. Connecting flange plate; 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 plate; 25. Elastic exhaust plate; 26. Air guide seat; 261. Sealing gasket; 262. Vent; 27. Cushioning airbag seat; 28. Cushioning airbag cushion; 29. ​​Guide exhaust port; 3. Exhaust mechanism; 31. Exhaust column; 32. Exhaust hole; 33. Rotating seat; 34. Rotating fan. DETAILED DESCRIPTION

[0032] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0033] Example 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, comprising an expansion absorption body 1, the expansion absorption body 1 comprising a flange connection plate 11, a connection flange sheet 13, a split partition plate 12 installed between the flange connection plate 11 and the connection flange sheet 13, an expansion absorption subshell 2 installed between the split partition plates 12, and an exhaust mechanism 3 provided on one side of the connection flange sheet 13;

[0034] The expansion absorption sub-shell 2 includes an outer sealing plate 21 and an inner positioning plate 22. An air guide seat 26 is welded and fixed between the outer sealing plate 21 and the inner positioning plate 22. An air guide channel 23 is installed on the inner side of the air guide seat 26. A buffer airbag seat 27 is provided on the outer side of the air guide channel 23. A buffer airbag cushion 28 is provided on one side of the buffer airbag seat 27. The buffer airbag seat 27 and the buffer airbag cushion 28 are connected to each other through a connecting pipe. An elastic exhaust sheet 25 is provided on one side of the buffer airbag cushion 28. A guide exhaust port 29 is opened on the surface of the inner positioning plate 22. When gas passes through the air guide channel 23, it is pressed on the buffer airbag seat 27 and connected to the buffer airbag cushion 28 through the connecting pipe to buffer the force, thereby reducing the impact.

[0035] The elastic exhaust sheet 25 and the buffer airbag cushion 28 are symmetrically installed on the inner side of the air guide seat 26, and the positions of one side opening of the air guide channel 23 and the guide exhaust port 29 correspond to the position of the elastic exhaust sheet 25. An air guide sheet 24 is provided on the inner side of the air guide channel 23, and the length of the air guide sheet 24 increases sequentially. When in use, the air is blocked and guided by the air guide sheet 24 and then blown toward the elastic exhaust sheet 25. The blowing opening of the elastic exhaust sheet 25 is guided by the guide exhaust port 29 to blow toward the exhaust mechanism 3.

[0036] Further, see Figures 1 to 7 , vents 262 are provided on the surfaces of the split partition plate 12 and the air guide seat 26, and a sealing gasket 261 is provided on one side of the air guide seat 26, which is convenient for sealing the outer side of the air guide seat 26 during use, so that the ventilation is more stable during use; the buffer airbag cushion 28 is fitted and fixed on the inner wall of the air guide seat 26, and the two sides of the air guide channel 23 and the elastic exhaust sheet 25 are located between the buffer airbag cushion 28, which is convenient for the gas to flow into the buffer airbag cushion 28 for buffering after being subjected to force during use; one end of the air intake pipe 14 is connected to one end of the air guide channel 23, and the expansion and absorption shells 2 are connected to each other through the air guide channel 23, which is convenient for ventilation and exhaust during use.

[0037] From the above description, it can be seen that the present invention has the following beneficial effects: when in use, the buffer airbag seat 27 is supported on the outside of the air guide channel 23 for buffering, and the buffer airbag cushion 28 is installed on one side of the buffer airbag seat 27. When the buffer airbag seat 27 is subjected to force, the gas enters the buffer airbag cushion 28 and is pressed on the elastic exhaust sheet 25 at the same time, ensuring that the buffering effect can be further enhanced during use, and the guide exhaust port 29 is used to conveniently and quickly guide the discharge direction.

[0038] Example 2: Please refer to Figures 1 to 7 As shown, based on 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 piece 13, and the outer sealing plate 21 is fixedly installed on the connecting support protrusion 16 by bolts. When in use, the outer sealing plate 21 is conveniently and quickly connected through the connecting support protrusion 16, thereby facilitating disassembly, assembly, 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 piece 13, an air intake pipe 14 is provided on one side of the expansion absorption shell 2, and an exhaust pipe 15 is provided on one side of the flange connecting plate 11, which facilitates air intake and exhaust when in use.

[0039] The expansion absorbing sub-shell 2 using the above technical solution is separated and installed by the split partition plate 12 during use. When the elastic exhaust sheet 25 or the buffer airbag seat 27 in the expansion absorbing sub-shell 2 fails after long-term use, the damaged part can be replaced without replacing all of it to reduce maintenance costs.

[0040] Further, see Figures 1 to 7 The exhaust mechanism 3 includes an exhaust column 31 mounted on the flange connecting plate 11, and an exhaust hole 32 is opened on the surface of the exhaust column 31. A rotating seat 33 is rotatably mounted on one end of the exhaust column 31, and a rotating fan 34 is fixedly mounted on one side of the rotating seat 33. When in use, the rotating seat 33 is connected to the main shaft of the machine body, and the rotating fan 34 is rotatably mounted on the exhaust column 31 through the rotating seat 33, and air is ventilated into the exhaust column 31 through the exhaust hole 32; the inner cavity of the exhaust column 31 is connected to the exhaust pipe 15, and the exhaust hole 32 is connected to the inner cavity of the exhaust column 31, which is convenient for exhausting to the outside when in use. The direction of the guide 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 pushing the rotating fan 34 to rotate and converting gas energy into mechanical energy when in use.

[0041] The exhaust mechanism 3 using the above technical solution separates the expansion absorption shell 2 through the exhaust column 31 and the split partition plate 12 when in use, and exhausts through the exhaust hole 32. When exhausting, it pushes the rotating fan 34 and the rotating seat 33 to rotate, thereby converting the exhaust capacity into mechanical work, which is more convenient when performing conversion.

[0042] The working principle and use process of the present invention are as follows: when in use, the flange 13 is connected and screwed to the body, the air intake pipe 14 takes air into the interior of the expansion and absorption main body 1, and then the gas enters the air guide channel 23, passes through the blocking guide of the air guide plate 24 and is blown to the elastic exhaust plate 25, and the air vent 262 ensures that the air guide channels 23 between the expansion and absorption sub-shells 2 are interconnected. When the gas passes through the air guide channel 23, it is pressed on the buffer airbag seat 27, and is connected to the buffer airbag cushion 28 through the connecting pipe for force buffering, thereby reducing the impact, and the gas blows open the elastic exhaust plate. 25 cooperates with the guide exhaust port 29 to guide the air to 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 cushioning airbag seat 27 is wrapped in the outer cushioning and can provide a certain sound insulation ability to reduce external noise. When a failure occurs during long-term use, the damaged expansion absorption shell 2 can be removed separately. When installing a new expansion absorption shell 2, the inner positioning plate 22 and the outer sealing plate 21 are supported between the split partition plate 12, and are sealed on the split partition plate 12 through the sealing gasket 261, thereby ensuring stable use after installation.

[0043] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply the existence of any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

[0044] The above description is only used to illustrate the technical solution of the present invention and is not intended to limit it. Other modifications or equivalent substitutions made to the technical solution of the present invention by ordinary technicians in this field should be included in the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solution of the present invention.

Claims

1. An expansion absorption device and a gas turbine exhaust system, characterized in that: The expansion absorption device comprises an expansion absorption body (1), the expansion absorption body (1) comprising a flange connection plate (11), a connection flange sheet (13), a split partition plate (12) installed between the flange connection plate (11) and the connection flange sheet (13), an expansion absorption subshell (2) installed between the split partition plates (12), and an exhaust mechanism (3) provided on one side of the connection flange sheet (13); The expansion absorption subshell (2) includes an outer sealing plate (21) and an inner positioning plate (22), an air guide seat (26) is welded and fixed between the outer sealing plate (21) and the inner positioning plate (22), an air guide channel (23) is installed on the inner side of the air guide seat (26), a buffer airbag seat (27) is provided on the outer side of the air guide channel (23), a buffer airbag cushion (28) is provided on one side of the buffer airbag seat (27), and the buffer airbag seat (27) and the buffer airbag cushion (28) are connected to each other through a connecting pipe, an elastic exhaust sheet (25) is provided on one side of the buffer airbag cushion (28), and a guide exhaust port (29) is provided on the surface of the inner positioning plate (22); The elastic exhaust sheet (25) and the buffer airbag cushion (28) are both symmetrically mounted on the inner side of the air guide seat (26), and the positions of the opening on one side of the air guide channel (23) and the guide exhaust port (29) correspond to the position of the elastic exhaust sheet (25); 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 connection plate (11); An air guide plate (24) is provided on the inner side of the air guide channel (23), and the lengths of the air guide plates (24) increase in sequence; The exhaust mechanism (3) includes an exhaust column (31) mounted on the flange connection plate (11), an exhaust hole (32) is provided on the surface of the exhaust column (31), a rotating seat (33) is rotatably mounted on one end of the exhaust column (31), and a rotating fan (34) is fixedly mounted on one side of the rotating seat (33); The inner cavity of the exhaust column (31) is in communication with the exhaust pipe (15), and the exhaust hole (32) is in communication with the inner cavity of the exhaust column (31); The orientation of the guide exhaust port (29) corresponds to the position of the rotating fan (34) and is tangent to the outer edge of the rotating fan (34); One end of the air intake pipe (14) is in communication with one end of the air guide channel (23), and the expansion and absorption sub-shells (2) are in communication with each other through the air guide channel (23).

2. An expansion absorption device and a gas turbine exhaust system according to claim 1, characterized in that: A connection support protrusion (16) is provided on one side of the flange connection plate (11) and the connection flange sheet (13), and the outer sealing plate (21) is fixedly mounted on the connection support protrusion (16) by means of 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 welded and fixed to the flange connecting plate (11) and the connecting flange plate (13).

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

5. An expansion absorption device and a gas turbine exhaust system according to claim 1, characterized in that: The buffer airbag cushion (28) is fitted and fixed on the inner wall of the air guide seat (26), and both sides of the air guide channel (23) and the elastic exhaust sheet (25) are located between the buffer airbag cushion (28).

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