Air-cooled inclined diaphragm gas turbine hot end load frame

Abstract

The application provides a gas-cooled inclined support plate gas turbine hot-end load-bearing frame, and belongs to the technical field of gas turbines. The load-bearing frame comprises an outer load-bearing casing, an inner load-bearing casing, a bearing seat arranged on the inner side of the inner load-bearing casing and used for forming a bearing cavity, an inclined support plate connected to the outer load-bearing casing and the inner load-bearing casing, wherein the inclined support plate is a hollow air-cooled support plate, the inclined support plate comprises functional support plates and non-functional support plates, the functional support plates comprise oil supply support plates, oil return support plates and sealing support plates, the oil supply support plates are used for the penetration of oil supply pipes, the oil return support plates are used for the penetration of oil return pipes, and the sealing support plates are used for the introduction and delivery of sealing air. The functional support plates and the non-functional support plates are distributed in a circumferential direction at intervals. A cold connection pipe is connected to two adjacent inclined support plates and used for delivering sealing air flowing into the sealing support plates to the oil supply support plates, the oil return support plates, the non-functional support plates and a sealing cavity, so as to cool the inclined support plates and seal the bearing cavity.

Description

Technical Field

[0001] This application belongs to the field of gas turbine technology, and specifically relates to a hot-end load-bearing frame for an air-cooled inclined plate gas turbine. Background Technology

[0002] The load-bearing frame, as the load-bearing component of the gas turbine, is used to support and transmit the rotor load, transferring the rotor load from the bearing housing to the outer load-bearing casing. Typically, the load-bearing frame consists of an outer load-bearing casing, an inner load-bearing casing, a certain number of support plates, bearing housings, and sealing structures. Among them, the support plates, as the main load-bearing structures passing through the main flow channel, not only ensure rigidity and stability but also provide bleed air, oil supply / return, and ventilation paths.

[0003] Due to the influence of the temperature gradient of the mainstream airflow, the hot-end load-bearing frame needs to have corresponding thermal deformation coordination capabilities. Once local thermal deformation is not coordinated, it may affect the concentricity of the support points and thus cause vibration. In severe cases, it may even lead to cracks in the load-bearing frame, affecting the working safety of the gas turbine. In addition, due to the influence of the thermal radiation of the mainstream high-temperature gas and the heat conduction of the internal load-bearing casing, the surface temperature of the bearing housing in the hot-end load-bearing frame often increases with the increase of the gas turbine operating conditions, which causes the temperature of the lubricating oil medium in the bearing cavity to rise continuously, reducing the viscosity of the lubricating oil and accelerating the wear of moving parts such as bearings and gears.

[0004] Existing gas turbine hot-end load-bearing frames typically employ integral casting or welding of the inner and outer load-bearing casings and support plates. For engines with smaller production runs, especially during the development phase, the high cost, high scrap rate, and susceptibility to casting defects associated with integral casting mean that welded internal and external load-bearing casings and support plates are commonly used. Among these, inclined support plates, which can adjust the relative thermal expansion difference of the load-bearing casing, are the preferred support plate configuration. However, due to the welded structure, machining accuracy and dimensional stability are reduced, and welding stress is easily generated, decreasing the load-bearing capacity of the components. In severe cases, cracks may develop, leading to safety accidents.

[0005] Furthermore, in existing gas turbine hot-end load-bearing frames, the bearing housings and inner load-bearing casings are typically positioned using centering joints and bolt tightening. Under high operating conditions or transient states, the temperature gradient between the inner load-bearing casing and the bearing housing diameter is significant, making it easy for the mating joints to separate, leading to rotor support system instability and vibration. Additionally, due to the excessively high surface temperature of the bearing housings, the lubricating oil medium within the bearing cavity is prone to overheating due to thermal radiation. Therefore, there are many limitations in the selection of lubricating oil grades, often using high-temperature lubricating oils such as 4010 and 4050, which has significant limitations. Summary of the Invention

[0006] The purpose of this application is to provide an air-cooled inclined plate gas turbine hot end load-bearing frame to solve or alleviate at least one of the problems in the prior art.

[0007] The technical solution of this application is: a gas-cooled inclined plate gas turbine hot end load-bearing frame, comprising:

[0008] External load-bearing casing;

[0009] An inner load-bearing housing, wherein a bearing seat is provided on the inner side of the inner load-bearing housing to form a bearing cavity;

[0010] An inclined support plate connects the outer load-bearing casing and the inner load-bearing casing. The inclined support plate is a hollow air-cooled support plate. The inclined support plate includes functional support plates and non-functional support plates. The functional support plates include an oil supply support plate, an oil return support plate, and a sealing support plate. The oil supply support plate is used for the passage of the oil supply pipe. The oil return support plate is used for the passage of the oil return pipe. The sealing support plate is used for the introduction and delivery of sealing bleed air. The functional support plates and non-functional support plates are circumferentially distributed, and at least one non-functional support plate is provided between two adjacent functional support plates.

[0011] The cold connection pipe connects two adjacent inclined support plates and is used to transport the sealing air flowing into the sealing support plate to the oil supply support plate, the oil return support plate, the non-functional support plate and the sealing cavity, so as to cool the inclined support plate and seal the bearing cavity.

[0012] In an optional embodiment of this application, the number and type of the functional support plates are determined according to the stiffness and functional requirements of the load-bearing frame.

[0013] In an optional embodiment of this application, the oil supply support plate has three chambers extending along the length of the support plate. The three chambers include an oil supply pipe chamber located in the middle and a front chamber and a rear chamber located on the front and rear sides of the oil supply pipe chamber. The front chamber and the rear chamber of the oil supply support plate are connected to the oil supply pipe chamber through a through hole in the oil supply support plate.

[0014] The oil supply pipe passes through the top and bottom of the oil supply pipe chamber. The front chamber and rear chamber of the oil supply support plate are provided with cold connection pipe installation ports. The cold connection pipe is installed on the cold connection pipe installation port of the oil supply support plate and connected to the adjacent non-functional support plate.

[0015] In an optional embodiment of this application, the oil return support plate has three chambers extending along the length of the support plate. The three chambers include an oil return pipe chamber located in the middle and a front chamber and a rear chamber located on the front and rear sides of the oil return pipe chamber. The front chamber and the rear chamber of the oil return support plate are connected to the oil return pipe chamber through a through hole in the oil return support plate.

[0016] The return oil pipe passes through the top and bottom of the return oil pipe chamber. The front chamber and rear chamber of the return oil support plate are provided with cold connection pipe installation ports. The cold connection pipe is installed on the cold connection pipe installation port of the return oil support plate and connected to the adjacent non-functional support plate.

[0017] In an optional embodiment of this application, the sealing support plate has three chambers extending along the length of the support plate. The three chambers include a middle air intake tube chamber and a front chamber and a rear chamber of the sealing support plate located on the front and rear sides of the air intake tube chamber. The front chamber and the rear chamber of the sealing support plate are connected to the air intake tube chamber at the root and tip of the sealing support plate, respectively, thereby forming a zigzag flow channel.

[0018] The top and bottom of the air intake tube chamber are connected to the sealing air intake tube. The front chamber and rear chamber of the sealing support plate are provided with sealing support plate cold connection pipe installation ports. The cold connection pipe is installed on the sealing support plate cold connection pipe installation port and connected to the adjacent non-functional support plate.

[0019] In an optional embodiment of this application, the non-functional support plate has three chambers extending along the length of the support plate. The three chambers include a middle chamber and a front chamber and a rear chamber located on the front and rear sides of the middle chamber. The front chamber and the rear chamber communicate with the middle chamber at the root and tip of the non-functional support plate, respectively, thereby forming a zigzag flow channel.

[0020] The non-functional support plate front chamber and non-functional support plate rear chamber are provided with non-functional support plate cold connection pipe installation ports, and the cold connection pipes are installed on the non-functional support plate cold connection pipe installation ports to connect with the adjacent functional support plate.

[0021] In an optional embodiment of this application, the cold connection pipe installation ports of the oil supply support plate on the front chamber and the rear chamber of the oil supply support plate are distributed on both sides of the oil supply support plate.

[0022] The cold connection pipe installation ports of the oil return support plate on the front chamber and the rear chamber of the oil return support plate are distributed on both sides of the oil return support plate.

[0023] The sealing support plate cold connection pipe installation ports on the front chamber and rear chamber of the sealing support plate are distributed on both sides of the sealing support plate;

[0024] The non-functional support plate cold connection pipe installation ports on the front and rear chambers of the non-functional support plate are distributed on both sides of the non-functional support plate.

[0025] In an optional embodiment of this application, the inner side of the non-functional support plate is fixed to the inner load-bearing housing by a circumferentially arranged pin, and a spherical bearing is installed between the pin and the non-functional support plate.

[0026] In an optional embodiment of this application, the outer side of the inclined support plate is fixedly connected to the outer load-bearing casing by axial positioning with one bushing and two radial tension bolts.

[0027] In an optional embodiment of this application, the inner load-bearing casing and the bearing seat are fixed by means of centering with a stop and bolt connection.

[0028] The air-cooled inclined plate gas turbine hot-end casing support frame provided in this application has a hollow structure and can be independently disassembled and assembled. It solves the problems of thermal deformation incoordination between the support plate, inner / outer load-bearing casing, and bearing seat, limited lubricating oil grade, and high cost, high scrap rate, and easy casting defects of the support plate and load-bearing casing integral casting of small batch hot-end load-bearing frames. Attached Figure Description

[0029] To more clearly illustrate the technical solutions provided in this application, the accompanying drawings will be briefly described below. Obviously, the drawings described below are merely some embodiments of this application.

[0030] Figure 1 This is a schematic diagram of the overall load-bearing frame of the hot end casing of the air-cooled inclined plate gas turbine of this application.

[0031] Figure 2 Based on Figure 1 Schematic diagram of the AA section oil supply support plate installation structure.

[0032] Figure 3 Based on Figure 2 Schematic diagram of the cross-section of the EE section oil supply support plate.

[0033] Figure 4 Based on Figure 1 Schematic diagram of the BB section return oil support plate installation structure.

[0034] Figure 5 Based on Figure 1 Schematic diagram of the CC section sealing support plate installation structure.

[0035] Figure 6 Based on Figure 5 Schematic diagram of the FF section of the sealed support plate.

[0036] Figure 7 Based on Figure 1 Schematic diagram of the installation structure of the non-functional support plate of DD section.

[0037] Figure 8 Based on Figure 7 Schematic diagram of the non-functional support plate section of GG section.

[0038] Figure label:

[0039] 100-Bearing Frame

[0040] 1-External load-bearing casing

[0041] 11-Oil supply pipe

[0042] 12-Return oil pipe

[0043] 13-Seal the ventilator at the pivot point

[0044] 2-Inner bearing casing

[0045] 21-Bearing Housing

[0046] 22-Graphite sealing device

[0047] 23-Front Sealing Ring

[0048] 3- Inclined support plate

[0049] 31-Fuel supply support plate

[0050] 311-Oil Supply Chamber

[0051] 312-Front chamber of oil supply support plate

[0052] 313-Fuel supply support plate rear chamber

[0053] 314-Fuel supply support plate cold connection pipe installation port

[0054] 315-Fuel supply support plate through hole

[0055] 32-Return Oil Support Plate

[0056] 33-Sealing support plate

[0057] 331-Air Intake Chamber

[0058] 332-Seal the front chamber of the support plate

[0059] 333-Sealing support plate rear chamber

[0060] 334 - Sealed support plate cold connection pipe installation port

[0061] 34-Non-functional support plate

[0062] 341-Middle Chamber

[0063] 342-Non-functional brace anterior chamber

[0064] 343-Non-functional brace posterior chamber

[0065] 344-Non-functional support plate cold connection pipe installation port

[0066] 4-Cold Connecting Pipe Detailed Implementation

[0067] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments of this application will be described in more detail below with reference to the accompanying drawings.

[0068] This application provides a gas turbine hot-end load-bearing frame with an air-cooled inclined support plate. On the one hand, it can effectively improve the thermal deformation coordination between the support plate, the inner / outer load-bearing casing, and the bearing housing, and suppress the temperature level of the lubricating oil medium in the bearing cavity. On the other hand, thanks to the structure of the support plate that can be independently disassembled and assembled, it avoids the problems caused by welding and integral casting.

[0069] like Figures 1 to 6 As shown, the air-cooled inclined plate gas turbine hot end casing load-bearing frame 100 provided in this application includes: an outer load-bearing casing 1, an inner load-bearing casing 2, an inclined plate 3, and a cold connection pipe 4.

[0070] The outer load-bearing casing 1 is located outside the inner load-bearing casing 2. The outer load-bearing casing 1 is a polygonal frame structure, while the inner load-bearing casing 2 is a cylindrical structure. For the same geometric radius and number of support plates, the polygonal outer load-bearing casing 1 has stronger rigidity than the commonly used cylindrical outer load-bearing casing. The outer load-bearing casing 1 and the inner load-bearing casing 2 are supported by inclined support plates 3. The connection between the inclined support plates 3 and the outer load-bearing casing 1 is located in the middle of each polygon in the polygonal frame structure. The inclined support plates 3 are a set of hollow air-cooled support plates, and their number can be determined according to the rigidity of the load-bearing frame and the functional requirements of the support plates (oil supply / return, bearing cavity ventilation, induced air, etc.). The cooling pipe 4 is a double-row pipe that connects adjacent inclined support plates 3 and is used to introduce sealing induced air into the hollow structure of the remaining inclined support plates 3 to achieve cooling of the remaining inclined support plates 3. In the illustrated embodiment of this application, the number of inclined support plates 3 is 12.

[0071] The following embodiments of this application illustrate the functions of oil supply, oil return, and sealing / ventilation. It is understood that the load-bearing frame 100 of this application can be modified to include axial force balancing flow paths, bearing cavity ventilation flow paths, etc., according to the requirements of the air system and lubrication system, and the number and type of functional support plates can be adjusted accordingly.

[0072] In this embodiment of the application, the load-bearing frame 100 includes an oil supply pipe 11, an oil return pipe 12, and a fulcrum sealing vent pipe 13. The oil supply pipe 11, the oil return pipe 12, and the fulcrum sealing vent pipe 13 are disposed between the outer load-bearing casing 1 and the inner load-bearing casing 2 to provide oil supply / return channels and sealing vent channels. The inner side of the inner load-bearing casing 2 is equipped with a bearing housing 21, a graphite sealing device 22, and a front sealing ring 23. A bearing cavity can be formed between the bearing housing 21 and the graphite sealing device 22, and a sealing cavity can be formed between the graphite sealing device 22 and the front sealing ring 23.

[0073] The inclined support plate 3 in this application includes functional support plates and non-functional support plates 34. In this embodiment, the functional support plates are divided into two types according to the structural differences of the internal cavities: one type is the oil supply support plate 31 and the oil return support plate 32 used for oil supply and return, and the other type is the sealing support plate 33 for air ducting. Both types of support plates are hollow multi-chamber structures, and the two types of support plates are distributed circumferentially. At least one non-functional support plate 34 is provided between adjacent functional support plates. For example, in the embodiment illustrated in this application, two non-functional support plates 34 are provided between two adjacent functional support plates.

[0074] like Figure 2 and Figure 3 The diagram shows the installation structure and cross-sectional view of the oil supply support plate in this application. The oil supply support plate 31 has three chambers extending along its length: a middle oil supply pipe chamber 311 for the oil supply pipe 11 to pass through, and two chambers located on either side of the oil supply pipe chamber 311: a front chamber 312 and a rear chamber 313. The front and rear chambers are connected to the oil supply pipe chamber 311 via through holes 315. Both the front and rear chambers have cold connection pipe mounting ports 314. Cold connection pipes 4 are installed in these ports and connected to adjacent non-functional support plates, enabling circumferential interconnection between the support plates. Cold air flows from the cold connection pipe 4 into the front chamber 312 and the rear chamber 313 of the oil supply support plate. After passing through the through hole 315 of the oil supply support plate, it enters the oil supply pipe chamber 311, cools the oil supply pipe 11 in the oil supply pipe chamber 311, and then flows along the oil supply pipe chamber 311 to the outer cavity of the bearing seat.

[0075] The oil supply support plate 31 of this application utilizes a cooling air channel to cool the support plate, improve the working environment, enhance structural stability and service life, and coordinate the deformation between the inner and outer load-bearing casings and the support plate. The intermediate oil supply chamber 311 is physically isolated from the front and rear chambers by partitions, providing an oil supply channel to realize the oil supply function of the bearing cavity. The oil supply chamber 311 communicates with the outer cavity of the bearing housing 21. Multiple sets of oil supply support plate through holes 315 provided on the partitions form impact cooling air holes, which reduce the temperature level of the pipeline inside the intermediate oil supply chamber 311 while forming a cooling air film around the bearing housing 21, achieving uniform cooling of the lubricating oil medium in the bearing cavity.

[0076] In a preferred embodiment of this application, the oil supply support plate cold connection pipe mounting ports 314 on the front chamber 312 and the rear chamber 313 of the oil supply support plate are distributed on both sides of the oil supply support plate.

[0077] like Figure 4The diagram shows the installation structure of the return oil support plate in this application. The return oil support plate 32 has the same structure as the supply oil support plate 31. The return oil support plate 32 has three chambers extending along its length: a return oil pipe chamber in the middle for the return oil pipe 12 to pass through, and a front and rear chamber located on either side of the return oil pipe chamber. The front and rear chambers are connected to the return oil pipe chamber through through holes in the return oil support plate. Both the front and rear chambers have cold connection pipe installation ports. The cold connection pipe 4 is installed on these ports and connects to adjacent non-functional support plates, achieving circumferential interconnection between the support plates. Cold air flows from the cold connecting pipe 4 into the front chamber and rear chamber of the return oil support plate. After passing through the through hole of the return oil support plate, it enters the return oil pipe chamber, cools the return oil pipe 12 in the return oil pipe chamber, and then flows along the return oil pipe chamber to the outer cavity of the bearing housing, forming a cooling air film that wraps around the bearing housing, thereby achieving uniform cooling of the lubricating oil medium in the bearing cavity.

[0078] like Figure 5 and Figure 6 The diagram shows the sealing support plate installation structure and its cross-sectional view in this application. The sealing support plate 33 has three chambers extending along the length of the support plate: the air intake pipe chamber 331 and the sealing support plate front chamber 332 and sealing support plate rear chamber 333 located on the front and rear sides of the air intake pipe chamber 331. The sealing support plate front chamber 332 and sealing support plate rear chamber 333 are connected to the air intake pipe chamber 331 at the root and tip of the sealing support plate, respectively, thus forming a zigzag flow channel. The top and bottom of the air intake pipe chamber 331 are connected to the sealing air intake pipe 13. The sealing support plate front chamber 332 and sealing support plate rear chamber 333 are both provided with sealing support plate cold connection pipe installation ports 334. The cold connection pipe 4 is installed on the sealing support plate cold connection pipe installation port 334 and connected to the adjacent non-functional support plate to realize the circumferential interconnection of the support plates. The cooling air introduced through the sealed air intake pipe 13 flows along the air intake pipe chamber 331 to the front chamber 332 and the rear chamber 333 of the sealed support plate on both sides, and then flows into the cold connection pipe 4; the other part flows into the sealed chamber from the sealed air intake pipe 13 at the bottom of the air intake pipe chamber 331.

[0079] The sealing support plate 33 of this application utilizes a folded flow channel to achieve cooling of the support plate and coordinate the deformation between the inner and outer load-bearing casings and the support plate. The bottom of the intermediate air venting chamber 331 is provided with a stepped hole for installing the sealing air venting pipe 13 to realize the air venting function of the sealing chamber.

[0080] In a preferred embodiment of this application, the sealing support plate cold connection pipe mounting ports 334 on the front chamber 332 and the rear chamber 333 of the sealing support plate are distributed on both sides of the sealing support plate.

[0081] like Figure 7 and Figure 8The diagram shows the installation structure and cross-sectional view of the non-functional support plate in this application. The remaining sealing support plates 33 have similar structures, except that the intermediate chamber of the non-functional support plate does not provide a pipe passage. Specifically, the non-functional support plate has three chambers extending along its length: a central chamber 341 and a front chamber 342 and a rear chamber 343 located on either side of the central chamber 341. The front chamber 342 and the rear chamber 343 communicate with the central chamber 341 at the root and tip of the support plate, respectively, forming a zigzag flow channel. Both the front chamber 342 and the rear chamber 343 are provided with cold connection pipe installation ports 344. The cold connection pipe 4 is installed on the cold connection pipe installation ports 344 and connects to the adjacent functional support plate, achieving circumferential interconnection of the support plates.

[0082] The non-functional support plate 34 of this application utilizes the internal folding flow channel to achieve support plate cooling and coordinate the deformation coordination between the inner and outer load-bearing casings and the support plate. Compared with the functional support plate, the chamber does not provide pipeline channels, but is connected to the front and rear chambers.

[0083] In a preferred embodiment of this application, the non-functional support plate cold connection pipe mounting ports 344 on the non-functional support plate front chamber 342 and the non-functional support plate rear chamber 343 are distributed on both sides of the non-functional support plate.

[0084] Furthermore, the non-functional support plate 34 in this application is a set of independent and detachable support plates. The inner side of each non-functional support plate 34 is fixed to the inner load-bearing housing 2 by two circumferentially arranged pins 14. A spherical bearing 15 is installed between the pins 14 and the non-functional support plate 35 to eliminate the "struggle" between the inner and outer load-bearing housings caused by thermal deformation incompatibility, thereby reducing the risk of cracks or even breakage of the support plate due to stress concentration.

[0085] In this application, the outer side of each inclined support plate 3 is fixedly connected to the outer load-bearing casing 1 by one axial positioning bushing 16 and two radial tension bolts 17. The independent disassembly and assembly structure of the inclined support plate 3 avoids the welding stress that occurs when welding the inclined support plate 3 and the load-bearing casing, as well as the problems of high cost, high scrap rate, and easy casting defects in the integral casting structure of the inclined support plate 3 and the load-bearing casing.

[0086] In some embodiments of this application, the bearing housing 21 and the inner bearing casing 2 are connected by a stop-type centering and bolt tightening method. The stop ensures assembly quality during cold assembly. Under high operating conditions or transitional states, the mating surfaces of the inner bearing casing 2 and the bearing housing 21 benefit from the cooling airflow in the intermediate chamber of the oil supply / return support plate, making separation less likely. This indirectly improves the stability of the rotor support system and ensures stable and reliable centering under gas turbine operating conditions. At the same time, the bearing housing 21 and the bearing outer ring 211 are preferably made of materials with the same or similar coefficients of linear expansion to reduce the amount of deformation incompatibility between the bearing housing 21 and the bearing outer ring 211.

[0087] The air-cooled inclined plate gas turbine hot-end casing support frame provided in this application has a hollow structure and can be independently disassembled and assembled. It solves the problems of thermal deformation incoordination between the support plate, inner / outer load-bearing casing, and bearing seat, limited lubricating oil grade, and high cost, high scrap rate, and easy casting defects of the support plate and load-bearing casing integral casting of small batch hot-end load-bearing frames.

[0088] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. An air-cooled dihedral strut gas turbine hot end load frame characterized by, The application relates to a bearing frame, which comprises: an outer bearing frame; an inner bearing frame, which is internally provided with a bearing seat for forming a bearing cavity; an inclined support plate connecting the outer bearing frame and the inner bearing frame, wherein the inclined support plate is a hollow air-cooling support plate, the inclined support plate comprises functional support plates and non-functional support plates, the functional support plates comprise oil supply support plates, oil return support plates and sealing support plates, the oil supply support plates are used for the penetration of oil supply pipes, the oil return support plates are used for the penetration of oil return pipes, and the sealing support plates are used for the introduction and transportation of sealing air; the functional support plates and the non-functional support plates are distributed in a circumferential direction, and at least one non-functional support plate is arranged between two adjacent functional support plates; a cold connection pipe, which connects two adjacent inclined support plates and is used for transporting sealing air flowing into the sealing support plates to the oil supply support plates, the oil return support plates, the non-functional support plates and a sealing cavity, so as to cool the inclined support plates and seal the bearing cavity.

2. The air-cooled radial-strut gas turbine hot-end load frame of claim 1 wherein, The number and type of the functional support plates are determined according to the rigidity and functional requirements of the bearing frame.

3. The air-cooled radial-strut gas turbine hot-end load frame of claim 1 wherein, The oil supply support plate is internally provided with three chambers extending along the length direction of the support plate, the three chambers comprise an oil supply pipe chamber located in the middle and oil supply support plate front and rear chambers located on the two sides of the oil supply pipe chamber, and the oil supply support plate front and rear chambers are communicated with the oil supply pipe chamber through oil supply support plate through holes; the oil supply pipe penetrates the top and bottom of the oil supply pipe chamber, the oil supply support plate front and rear chambers are provided with oil supply support plate cold connection pipe mounting ports, and the cold connection pipe is mounted on the oil supply support plate cold connection pipe mounting ports and connected with adjacent non-functional support plates.

4. The air-cooled radial-strut gas turbine hot- end load frame of claim 3 wherein, The oil return support plate is internally provided with three chambers extending along the length direction of the support plate, the three chambers comprise an oil return pipe chamber located in the middle and oil return support plate front and rear chambers located on the two sides of the oil return pipe chamber, and the oil return support plate front and rear chambers are communicated with the oil return pipe chamber through oil return support plate through holes; the oil return pipe penetrates the top and bottom of the oil return pipe chamber, the oil return support plate front and rear chambers are provided with oil return support plate cold connection pipe mounting ports, and the cold connection pipe is mounted on the oil return support plate cold connection pipe mounting ports and connected with adjacent non-functional support plates.

5. The air-cooled radial-strut gas turbine hot- end load frame of claim 4 wherein, The sealing support plate is internally provided with three chambers extending along the length direction of the support plate, the three chambers comprise an air pipe chamber located in the middle and sealing support plate front and rear chambers located on the two sides of the air pipe chamber, and the sealing support plate front and rear chambers are communicated with the air pipe chamber at the root and tip of the sealing support plate respectively, so as to form a turning flow channel; the top and bottom of the air pipe chamber are connected with sealing air pipes, the sealing support plate front and rear chambers are provided with sealing support plate cold connection pipe mounting ports, and the cold connection pipe is mounted on the sealing support plate cold connection pipe mounting ports and connected with adjacent non-functional support plates.

6. The air-cooled radial-strut gas turbine hot- end load frame of claim 5 wherein, The non-functional support plate has three chambers extending along the length of the support plate. The three chambers include a middle chamber and a front chamber and a rear chamber located on the front and rear sides of the middle chamber. The front chamber and the rear chamber are connected to the middle chamber at the root and tip of the non-functional support plate, respectively, thereby forming a zigzag flow channel. The non-functional support plate front chamber and non-functional support plate rear chamber are provided with non-functional support plate cold connection pipe installation ports, and the cold connection pipes are installed on the non-functional support plate cold connection pipe installation ports to connect with the adjacent functional support plate.

7. The air-cooled radial-strut gas turbine hot- end load frame of claim 6 wherein, The cold connection pipe installation ports of the oil supply support plate on the front chamber and rear chamber of the oil supply support plate are distributed on both sides of the oil supply support plate. The cold connection pipe installation ports of the oil return support plate on the front chamber and the rear chamber of the oil return support plate are distributed on both sides of the oil return support plate. The sealing support plate cold connection pipe installation ports on the front chamber and rear chamber of the sealing support plate are distributed on both sides of the sealing support plate; The non-functional support plate cold connection pipe installation ports on the front and rear chambers of the non-functional support plate are distributed on both sides of the non-functional support plate.

8. The air-cooled radial-strut gas turbine hot- end load frame of claim 6 or 7, wherein, The inner side of the non-functional support plate is fixed to the inner load-bearing housing by a circumferentially arranged pin, and a spherical bearing is installed between the pin and the non-functional support plate.

9. The air-cooled radial-strut gas turbine hot- end load frame of claim 8 wherein, The outer side of the inclined support plate is fixedly connected to the outer load-bearing casing by axial positioning with one bushing and two radial tension bolts.

10. The air-cooled radial-strut gas turbine hot- end load frame of claim 9 wherein, The inner load-bearing casing and bearing housing are fixed by means of centering and bolt connection.

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