Exhaust structure of gas turbine

Abstract

The invention relates to the technical field of gas turbines, in particular to an exhaust structure of a gas turbine, which comprises an exhaust chamber arranged on a gas turbine body, and the exhaust chamber is provided with a plurality of slots; the heat conduction unit comprises an upper guide block arranged at an opening in the outer side of the open groove and a lower guide block arranged at an opening in the inner side of the open groove, and is used for increasing the heat exchange surface area of the exhaust chamber; the telescopic mechanism is arranged between the upper guide block and the lower guide block and used for supporting the heat conduction unit to be limited in the open groove; the fixing mechanism is arranged on the outer wall of the exhaust chamber and used for fixing the heat conduction unit. The device can assist in reducing the temperature of the outer wall face of the gas turbine, and stable operation of the gas turbine is guaranteed; a telescopic mechanism is arranged, so that the single heat conduction unit can be conveniently mounted, dismounted and replaced; and through the arrangement of the fixing mechanism, the operation is simpler, more convenient and quicker when the heat conduction unit is replaced, and the maintenance cost is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of gas turbines, and in particular to an exhaust structure of a gas turbine. Background Art

[0002] The exhaust structure of the gas turbine is an important part of the gas turbine system. It is mainly responsible for discharging the exhaust gas that has been burned and converted into high-temperature and high-pressure gas. After being processed by a series of components, these exhaust gases are discharged to the external environment through the exhaust system.

[0003] When the gas turbine is running at high conditions, the flue gas temperature can reach 400℃-600℃, and the flue gas heat generated will accumulate in the exhaust structure. On the one hand, the temperature of the gas turbine outer wall cannot be reduced to below 60℃, which will pose a safety threat to the on-site unit maintenance personnel; on the other hand, the temperature of the gas inside the gas turbine is too high, which will affect the working condition of the gas turbine.

[0004] The above contents are only used to assist in understanding the technical solution of the present invention, and do not constitute an admission that the above contents are the closest prior art. Summary of the invention

[0005] The object of the present invention is to solve the above-mentioned deficiencies and provide an exhaust structure for a gas turbine.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions: an exhaust structure of a gas turbine, comprising an exhaust chamber arranged on a gas turbine body, wherein a plurality of slots are evenly arranged on the circumferential surface of the exhaust chamber;

[0007] a heat transfer unit, comprising an upper guide block disposed at an outer opening of the slot and a lower guide block disposed at an inner opening of the slot, for increasing a heat exchange surface area of ​​the exhaust chamber;

[0008] A telescopic mechanism, disposed between the upper guide block and the lower guide block, and used to support the heat conduction unit to be limited in the slot;

[0009] The fixing mechanism is arranged on the outer wall of the exhaust chamber and is used for fixing the heat conduction unit.

[0010] Furthermore, the telescopic mechanism includes two side plates arranged on both sides of the opposite ends of the upper guide block and the lower guide block, an upper limit block and a lower limit block slidably arranged on the upper and lower ends of the side plates, an inner support plate is rotatably arranged on the inner side of the lower limit block, a vertical plate is arranged between the upper limit block and the inner support plate, and a tooth plate is vertically arranged on the inner end of the vertical plate.

[0011] Furthermore, a tooth column is arranged between the upper and lower tooth plates.

[0012] Furthermore, the fixing mechanism includes a fixing block arranged on the upper limit block, and plug posts arranged at the lower end of the fixing block and distributed in sequence on the left, middle and right, and a fixing component for lateral limiting is arranged inside the middle plug post.

[0013] Furthermore, the fixing assembly includes a rotating rod vertically rotatably arranged in the plug column, and a gear arranged on the rotating rod, and two first racks and a second rack moving parallel to each other are meshed on the front and rear of the gear.

[0014] Furthermore, the two plug posts distributed on the left and right are provided with first through openings adapted to pass through the ends of the first rack and the second rack.

[0015] Furthermore, an embedding block is provided on the lower side of the fixed block, and an embedding groove adapted to the embedding block is provided on the outer wall of the exhaust chamber and on the side of the groove, and the two sides of the embedding groove are adapted to the slots of the two plug posts distributed on the left and right, and a second opening connected to the slots is horizontally penetrated in the embedding groove.

[0016] Furthermore, both ends of the upper guide block and the lower guide block are sealed with metal end blocks.

[0017] Compared with the prior art, the present invention has the following beneficial effects: the heat transfer unit provided in the present invention can be installed and fixed corresponding to the number of slots evenly provided on the circumferential surface of the exhaust chamber, thereby increasing the heat exchange surface area of ​​the exhaust chamber, providing more contact areas to dissipate heat, helping to improve the flow of air around the radiator, increasing the heat exchange rate, and assisting in reducing the temperature of the outer wall of the gas turbine, thereby avoiding safety threats to on-site gas turbine unit maintenance personnel and ensuring the stable operation of the gas turbine; and through the provision of a telescopic mechanism, a single heat transfer unit can be conveniently installed, disassembled and replaced; and through the provision of a fixing mechanism, the operation of replacing the heat transfer unit is simpler and faster, thereby reducing maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0019] Figure 1 A three-dimensional structural diagram of an overall perspective of an embodiment of the present invention;

[0020] Figure 2 A three-dimensional structural diagram of an exhaust chamber from one perspective of an embodiment of the present invention;

[0021] Figure 3 A three-dimensional structural diagram showing a single heat conduction unit combined on an exhaust chamber according to an embodiment of the present invention from one perspective;

[0022] Figure 4 for Figure 3 The enlarged structural diagram at A in the middle;

[0023] Figure 5 A three-dimensional structural diagram of a heat conduction unit according to an embodiment of the present invention from one viewing angle;

[0024] Figure 6 A three-dimensional structural diagram of a fixing mechanism according to an embodiment of the present invention from one viewing angle;

[0025] Figure 7 It is a structural schematic diagram of a telescopic mechanism in one embodiment of the present invention;

[0026] Figure 8 It is a schematic diagram of the internal structure of the fixing mechanism in one embodiment of the present invention;

[0027] Fig. 9 It is a schematic structural diagram of the installation connection between the fixing mechanism and the embedding groove in one embodiment of the present invention.

[0028] In the figure: 100, gas turbine body; 200, exhaust chamber; 1, slot; 2, heat transfer unit; 21, upper guide block; 22, lower guide block; 3, telescopic mechanism; 31, side plate; 32, upper limit block; 33, lower limit block; 331, inner support plate; 34, vertical plate; 35, tooth plate; 36, tooth column; 4, fixing mechanism; 41, fixing block; 42, plug column; 43, fixing assembly; 431, rotating rod; 432, gear; 433, first rack; 434, second rack; 44, first opening; 45, embedded block; 5, embedded groove; 51, slot; 52, second opening; 6, metal end block. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. In the absence of conflict, the embodiments in this application and the features in the embodiments can be combined with each other. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0030] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0031] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or schemes that A and B meet at the same time. In addition, "multiple" refers to more than two. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0032] like Figure 1-9 As shown, an exhaust structure of a gas turbine of the present invention comprises an exhaust chamber 200 arranged on a gas turbine body 100, and a plurality of slots 1 are evenly arranged along the circumference of the exhaust chamber 200;

[0033] The heat transfer unit 2 includes an upper guide block 21 disposed at the outer opening of the slot 1 and a lower guide block 22 disposed at the inner opening of the slot 1, and is used to increase the heat exchange surface area of ​​the exhaust chamber 200;

[0034] A telescopic mechanism 3 is disposed between the upper guide block 21 and the lower guide block 22 and is used to support the heat conduction unit 2 to be limited in the slot 1;

[0035] The fixing mechanism 4 is disposed on the outer wall of the exhaust chamber 200 and is used to fix the heat transfer unit 2 .

[0036] In a specific implementation, an exhaust chamber 200 is installed at the gas outlet end of the gas turbine body 100, and the same number of heat transfer units 2 are correspondingly plugged and assembled in the slots 1 uniformly turned along the circumference of the outer wall of the exhaust chamber 200 and penetrated from top to bottom, thereby increasing the heat exchange surface area of ​​the exhaust chamber 200, providing more contact areas to dissipate heat, helping to improve the flow of air around the radiator, increasing the heat exchange speed, and reducing the temperature of the outer wall of the gas turbine, thereby avoiding safety threats to the on-site unit maintenance personnel, so as to ensure the stable operation of the gas turbine;

[0037] When installing or removing the heat conducting unit 2, the telescopic mechanism 3 installed between the upper guide block 21 and the lower guide block 22 included on the heat conducting unit 2 can telescope the limiting structure disposed inside the slot 1, so that the limiting structure supported by the inner side of the slot 1 is pushed into the upper guide block 21 and the lower guide block 22, so that the heat conducting unit 2 can be directly pulled out and separated from the slot 1 for separate installation, removal and replacement, thereby reducing maintenance costs and time costs;

[0038] In addition, the fixing mechanism 4 installed on the outer wall of the exhaust chamber 200 can lock and fix the heat conduction unit 2 inserted into the corresponding groove on the groove 1, so that the operation of replacing the heat conduction unit 2 is simpler and faster.

[0039] It should be noted that the upper guide block 21 and the lower guide block 22 included in the heat conduction unit 2 are both made of metal.

[0040] In one embodiment, the telescopic mechanism 3 includes two side plates 31 arranged on both sides of the opposite ends of the upper guide block 21 and the lower guide block 22, an upper limit block 32 and a lower limit block 33 slidably arranged at the upper and lower ends of the side plates 31, an inner support plate 331 is rotatably arranged on the inner side of the lower limit block 33, a vertical plate 34 is arranged between the upper limit block 32 and the inner support plate 331, a tooth plate 35 is vertically arranged at the inner end of the vertical plate 34, and a tooth column 36 is arranged between the upper and lower tooth plates 35. In this design, the side plate 31 is turned and installed between the upper guide block 21 and the lower guide block 22, and the upper limit block 32 and the lower limit block 33 are slidably installed in the sliding groove turned at the upper and lower ends of the side plate 31, and the inner support plate 331 is rotatably connected to the inner side of the lower limit block 33 through a rotating shaft sleeved with a torsion spring. When the heat conduction unit 2 inserted and assembled in the corresponding groove on the slot 1 is disassembled, the upper limit block 32 is pushed inward. Since the inner part of the upper limit block 32 is welded and fixed to the tooth plate 35 vertically welded on the vertical plate 34 welded to the corresponding part on the inner support plate 331, the tooth plate 35 will move with the upper limit block 32. The translation inward movement of the limit block 32 will drive the meshing tooth column 36 on the tooth plate 35 to rotate, and then the rotation of the tooth column 36 drives the meshing tooth plate 35 on the other side to move horizontally toward each other, so that the upper limit blocks 32 distributed on both sides of the heat conducting unit 2 are retracted inwardly, and then the vertical plate 34 welded on the lower end of the upper limit block 32 transmits the horizontal inward translation force to the inner support plate 331 welded on the lower side of the vertical plate 34, thereby synchronously driving the lower limit blocks 33 distributed on both sides of the heat conducting unit 2 and placed on the inner opening of the slot 1 to retract inwardly, releasing the limit, and facilitating the extraction of the heat conducting unit 2;

[0041] During installation, since the lower limit block 33 and the inner support plate 331 are rotatably connected by a rotating shaft with a torsion spring, when inserted inward, the lower limit block 33 will be pressed inward under the elastic support of the torsion spring installed on the inner support plate 331, so that the outer vertical surface of the lower limit block 33 is placed on the same horizontal plane as the side plate 31, which is convenient for insertion.

[0042] In one embodiment, the fixing mechanism 4 includes a fixing block 41 disposed on the upper limit block 32, and plugs 42 disposed at the lower end of the fixing block 41 and distributed in sequence on the left, middle, and right, and a fixing assembly 43 for lateral limiting is disposed inside the middle plug 42. With this design, the fixing block 41 is inserted and installed in the groove machined by the upper limit block 32, and three plugs 42 are welded at the lower end of the fixing block 41 and distributed on the left, middle, and right, and a cavity is opened in the plug 42 disposed in the middle, and the fixing assembly 43 for lateral limiting is installed in the cavity, so that the heat conducting unit 2 inserted into the slot 1 can be locked laterally, and the stability fixing effect is maintained.

[0043] In one embodiment, the fixing assembly 43 includes a rotating rod 431 vertically rotatably arranged in the plug column 42, a gear 432 arranged on the rotating rod 431, and two first racks 433 and second racks 434 that move parallel to each other are meshed in front and back on the gear 432. With this design, by means of the rotating rod 431 vertically rotatably installed in the plug column 42 and the gear 432 fixedly sleeved on the rotating rod 431, when the outer end of the rotating rod 431 is rotated, the rotating rod 431 and the gear 432 fixedly sleeved on the rotating rod 431 can be driven to rotate, so that the first rack 433 and the second rack 434 meshed in the same plane in front and back on the gear 432 move toward or away from each other, thereby achieving a connection effect of horizontal locking or release.

[0044] In one embodiment, the two inserted columns 42 distributed on the left and right are provided with first through-holes 44 adapted to pass through the ends of the first rack 433 and the second rack 434. With this design, by turning the first through-holes 44 on the two inserted columns 42 distributed on the left and right, the first rack 433 and the second rack 434 can be connected laterally through the first through-holes 44 during the lateral movement.

[0045] In one embodiment, an insert 45 is provided on the lower side of the fixing block 41, and an insert groove 5 adapted to the insert 45 is provided on the outer wall of the exhaust chamber 200 and on the side of the slot 1, and the two sides of the insert groove 5 are adapted to the slots 51 of the two inserted columns 42 distributed on the left and right, and a second through-hole 52 communicating with the slots 51 is horizontally penetrated in the insert groove 5. In this design, by means of the insert 45 welded on the lower side of the fixing block 41 and the insert groove 5 machined on the outer wall of the exhaust chamber 200 and on the side of the slot 1, when the fixing mechanism 4 is plugged in, the insert 45 can be closed and connected with the upper end opening of the insert groove 5;

[0046] The two slots 51 machined on both sides of the embedding groove 5 can be adapted and plugged with the two plug posts 42 welded on the left and right sides of the lower end of the fixing block 41;

[0047] The second opening 52 connected to the slot 51 is machined in the embedded groove 5. During lateral adjustment, the first rack 433 and the second rack 434 will pass through the second opening 52 accordingly until they are plugged and fixed to the two side ends of the inner groove of the slot 1 opened on the outer wall of the exhaust chamber 200, thereby realizing convenient fixing of the heat conduction unit 2.

[0048] In one embodiment, both ends of the upper guide block 21 and the lower guide block 22 are sealed with metal end blocks 6. With this design, by snapping the metal end blocks 6 detachably installed at both ends where the upper guide block 21 and the lower guide block 22 are connected, a closed heat transfer unit 2 can be formed to ensure a good heat exchange effect, and the metal end blocks 6 can also be disassembled and separated to maintain the relevant structures inside the heat transfer unit 2.

[0049] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered exemplary and non-restrictive in all respects, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention.

Claims

1. An exhaust structure of a gas turbine, comprising an exhaust chamber (200) arranged on a gas turbine body (100), characterized in that: A plurality of slots (1) are evenly arranged on the circumferential surface of the exhaust chamber (200); A heat conduction unit (2), comprising an upper guide block (21) arranged at an outer opening of the slot (1) and a lower guide block (22) arranged at an inner opening of the slot (1), for increasing a heat exchange surface area of ​​the exhaust chamber (200); A telescopic mechanism (3) is arranged between the upper guide block (21) and the lower guide block (22), and is used to support the heat conduction unit (2) to be limited in position within the slot (1); A fixing mechanism (4) is arranged on the outer wall of the exhaust chamber (200) and is used to fix the heat conduction unit (2).

2. The exhaust structure of a gas turbine according to claim 1, characterized in that: The telescopic mechanism (3) comprises two side plates (31) arranged on both sides of the opposite ends of the upper guide block (21) and the lower guide block (22), an upper limit block (32) and a lower limit block (33) slidably arranged at the upper and lower ends of the side plates (31), an inner support plate (331) rotatably arranged on the inner side of the lower limit block (33), a vertical plate (34) is arranged between the upper limit block (32) and the inner support plate (331), and a tooth plate (35) is vertically arranged at the inner end of the vertical plate (34).

3. The exhaust structure of a gas turbine according to claim 2, characterized in that: A tooth column (36) is arranged between the upper and lower tooth plates (35).

4. The exhaust structure of a gas turbine according to claim 2, characterized in that: The fixing mechanism (4) comprises a fixing block (41) arranged on the upper limit block (32), plug posts (42) arranged at the lower end of the fixing block (41) and distributed in sequence on the left, middle and right sides, and a fixing assembly (43) for lateral limiting is arranged inside the middle plug post (42).

5. The exhaust structure of a gas turbine according to claim 4, characterized in that: The fixing assembly (43) comprises a rotating rod (431) vertically rotatably arranged in the plug post (42), and a gear (432) arranged on the rotating rod (431), and the gear (432) is meshed with two first racks (433) and a second rack (434) that move parallel to each other at the front and rear ends.

6. The exhaust structure of a gas turbine according to claim 5, characterized in that: The two plug posts (42) distributed on the left and right are provided with first through openings (44) adapted to fit through the ends of the first rack (433) and the second rack (434).

7. The exhaust structure of a gas turbine according to claim 4, characterized in that: An embedded block (45) is arranged at the lower side of the fixing block (41); an embedded groove (5) adapted to the embedded block (45) is arranged on the outer wall of the exhaust chamber (200) and on the side of the slot (1); two sides of the embedded groove (5) are adapted to slots (51) of two inserted columns (42) distributed on the left and right; and a second opening (52) communicating with the slots (51) is horizontally penetrated in the embedded groove (5).

8. The exhaust structure of a gas turbine according to claim 1, characterized in that: Metal end blocks (6) are sealed at both ends of the upper guide block (21) and the lower guide block (22).

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