CN113931746B

CN113931746B - Gas turbine air inlet unit

Info

Publication number: CN113931746B
Application number: CN202111035371.XA
Authority: CN
Inventors: 虞辉; 谭峰; 侯苏宁; 徐祥; 涂梦雅; 路昊; 王乾远
Original assignee: Huaneng Nanjing Gas Turbine Power Generation Co ltd
Current assignee: Huaneng Nanjing Gas Turbine Power Generation Co ltd
Priority date: 2021-08-30
Filing date: 2021-08-30
Publication date: 2022-09-09
Anticipated expiration: 2041-08-30
Also published as: CN113931746A

Abstract

The invention discloses a gas turbine air inlet device, which comprises an interface end and a joint end, and comprises an interface piece arranged on a gas turbine, wherein the interface piece is provided with a first through hole; the joint end comprises an air inlet pipe head and a second connecting disc connected with the end part of the air inlet pipe head, the air inlet pipe head is provided with a second through hole, and the first connecting disc is connected with the second connecting disc; when the gas turbine carries out pipe connection operation, the first connecting disc is opposite to the second connecting disc, and then the pin shaft is inserted into the corresponding guide port to complete fixation; the gas turbine is connected with an external pipeline by using the interface end and the joint end, the joint end can be fastened and sealed with the interface end only by pressing down the joint end in the installation step, and the gas turbine can be detached only by slightly rotating the joint end; and the connection is comparatively firm in the use, is difficult for droing.

Description

Gas turbine air inlet unit

Technical Field

The invention relates to the field of gas turbines, in particular to a gas inlet device of a gas turbine.

Background

The gas turbine works by a compressor (i.e., compressor) that continuously draws in air from the atmosphere and compresses it; the compressed air enters a combustion chamber, is mixed with the injected fuel and then is combusted to form high-temperature gas, and then flows into a gas turbine to expand and do work to push a turbine impeller to drive a compressor impeller to rotate together; the work-doing capability of the heated high-temperature gas is obviously improved, so that the gas turbine still has residual work as the output mechanical work of the gas turbine while driving the compressor. When the gas turbine is started from a static state, the gas turbine needs to be driven by a starter to rotate, and the starter is disconnected after the gas turbine is accelerated to be capable of independently operating. The mode that the hose cup jointed and fastened with the iron wire is adopted to the connected mode between current combustion engine air intlet and the pipeline, and this kind of mounting means is when the installation or when dismantling, and all consuming time and hard, still can take place the phenomenon that the pipeline drops in the use.

Disclosure of Invention

This section is for the purpose of summarizing some aspects of embodiments of the invention and to briefly introduce some preferred embodiments, and in this section as well as in the abstract and the title of the invention of this application some simplifications or omissions may be made to avoid obscuring the purpose of this section, the abstract and the title of the invention, and such simplifications or omissions are not intended to limit the scope of the invention.

The present invention has been made keeping in mind the above problems and/or problems occurring in the prior art.

Therefore, the technical problem to be solved by the invention is that the existing connection mode between the air inlet and the pipeline of the combustion engine adopts a mode of sleeving a hose and fastening by using an iron wire, the installation mode is time-consuming and labor-consuming both in installation and disassembly, and the phenomenon of pipeline falling off can also occur in the use process.

In order to solve the technical problems, the invention provides the following technical scheme: the gas turbine air inlet device comprises an interface end, a first connecting disc and a second connecting disc, wherein the interface end comprises an interface piece arranged on a gas turbine, the interface piece is provided with a first through hole, and the end part of the interface piece is provided with the first connecting disc;

the joint end comprises an air inlet pipe head and a second connecting disc connected with the end part of the air inlet pipe head, the air inlet pipe head is provided with a second through hole, and the first connecting disc is connected with the second connecting disc.

As a preferable aspect of the gas turbine intake apparatus of the present invention, wherein: the end face, in contact with the second connecting disc, of the first connecting disc is provided with guide openings distributed along the circumference, the second connecting disc is provided with elongated slots, the number of the elongated slots is consistent with that of the guide openings, the positions of the elongated slots correspond to those of the guide openings, pin shafts are arranged in the elongated slots, and one ends of the pin shafts point to the guide openings.

As a preferable aspect of the gas turbine intake apparatus of the present invention, wherein: the inside ring channel that is provided with of first flange, the direction mouth be provided with run through extremely the guide way of ring channel, the guide way includes first end and second end, first end and direction mouth intercommunication, second end and ring channel intercommunication, the distance that the guide way is apart from the ring channel axle center increases from first end to second end linearity, the width of direction mouth with the width of guide way is unanimous.

As a preferable aspect of the gas turbine intake apparatus of the present invention, wherein: two side surfaces of the guide groove are provided with wide grooves extending along the axial direction, and the width of each wide groove is smaller than that of the guide groove;

and a circular truncated cone is arranged at one end of the pin shaft connected with the guide port, and the diameter of the circular truncated cone is larger than that of the pin shaft.

As a preferable aspect of the gas turbine intake apparatus of the present invention, wherein: the pin shaft is connected with threads, one end of the pin shaft, which is far away from the circular truncated cone, is connected with a positioning nut, and the end face of the positioning nut is connected with the end face of the second connecting disc in a sliding manner;

the pin shaft is further connected with a positioning ring, the positioning ring and the positioning nut are respectively located on two end faces of the second connecting disc, and the positioning ring is connected with the end face of the second connecting disc in a sliding mode.

As a preferable aspect of the gas turbine intake apparatus of the present invention, wherein: the positioning ring is provided with four guide openings, four elongated slots and four pin shafts, hooks are arranged on the positioning rings, a first spring is connected between every two adjacent positioning rings, and the first springs are connected to the hooks of the two positioning rings respectively.

As a preferable aspect of the gas turbine intake apparatus of the present invention, wherein: the second connecting disc is provided with an annular groove, an annular disc is arranged in the annular groove, a penetrating adjusting groove is formed in the annular disc, the pin shaft penetrates through the adjusting groove, and the adjusting groove is V-shaped.

As a preferable aspect of the gas turbine intake apparatus of the present invention, wherein: the adjusting groove is formed by enclosing two inclined surfaces and an arc surface, the two inclined surfaces are symmetrical, the arc surface is concentric with the annular disc, and the distance between the intersection line of the arc surface and the inclined surfaces and the circle center of the annular disc is longer than the distance between the intersection line of the two inclined surfaces and the circle center of the annular disc.

As a preferable aspect of the gas turbine intake apparatus of the present invention, wherein: the connector is characterized in that a cylindrical groove is arranged in the first through hole, the inner diameter of the cylindrical groove is larger than that of the first through hole, a cylindrical body is arranged in one end, close to the connector end, of the cylindrical groove, a second spring is arranged between the cylindrical body and the other end of the cylindrical groove, a flow groove is formed in the side face of the cylindrical body, and one end, close to the connector end, of the cylindrical body is conical.

As a preferable aspect of the gas turbine intake apparatus of the present invention, wherein: the second through hole is internally connected with a fixed disc, the fixed disc is provided with a circulation hole, and the fixed disc is further provided with a touch rod extending towards the direction of the interface end.

The invention has the beneficial effects that: the gas turbine is connected with an external pipeline by using the interface end and the joint end, the joint end can be fastened and sealed with the interface end only by pressing down the joint end in the installation step, and the gas turbine can be detached only by slightly rotating the joint end; and the connection is comparatively firm in the use, is difficult for droing.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise. Wherein:

FIG. 1 is a schematic structural diagram of an air inlet device of a gas turbine according to an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a second connecting disc in the gas turbine air inlet device according to an embodiment of the invention;

FIG. 3 is a schematic diagram illustrating an annular disk of an air inlet assembly of a gas turbine according to an embodiment of the present invention;

FIG. 4 is a schematic cross-sectional view illustrating a first connecting disk of an intake apparatus of a gas turbine according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram illustrating connection between an interface end and a joint end in a gas turbine inlet device according to an embodiment of the present invention.

Detailed description of the preferred embodiments

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced otherwise than as specifically described herein, and it will be appreciated by those skilled in the art that the present invention may be practiced without departing from the spirit and scope of the present invention and that the present invention is not limited by the specific embodiments disclosed below.

Next, the present invention is described in detail with reference to the drawings, and in the detailed description of the embodiments of the present invention, the cross-sectional views illustrating the device structures are not enlarged partially according to the general scale for convenience of illustration, and the drawings are only exemplary, which should not limit the scope of the present invention. In addition, the three-dimensional dimensions of length, width and depth should be included in the actual fabrication.

Further, reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one implementation of the invention. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.

Example 1

Referring to fig. 1, the embodiment provides a gas turbine air inlet device, which includes an interface end 100 and a joint end 200, where the interface end 100 is fixedly connected to a gas turbine and is an air inlet of the gas turbine, the interface end 100 includes an interface 101 disposed on the gas turbine, the interface 101 is connected to an original inlet of the gas turbine, the interface 101 is provided with a first through hole 101a, an end portion of the interface 101 is provided with a first connection disc 102, the first connection disc 102 is a disc shape, the joint end 200 is connected to an external air pipe, the joint end 200 includes an air inlet pipe head 201 and a second connection disc 202 connected to an end portion of the air inlet pipe head 201, the air inlet pipe head 201 is provided with a second through hole 201a, the first connection disc 102 is connected to the second connection disc 202, and when connected, the second connection disc 202 is opposite to the first connection disc 102 and has an end face attached.

The end face of the first connecting disc 102, which is in contact with the second connecting disc 202, is provided with guide openings 102a distributed along the circumference, in the embodiment, 4 guide openings 102a are uniformly distributed along the circumference, correspondingly, the second connecting disc 202 is provided with long grooves 202a, the long grooves 202a penetrate along the axial direction of the second connecting disc 202, and the long grooves 202a extend along the radial direction of the second connecting disc 202; the number of the long grooves 202a is consistent with the number and the positions of the guide openings 102a, the pin shaft 203 is arranged in the long groove 202a, the pin shaft 203 can move along the radial direction of the second connecting disc 202 in the long groove 202a, and one end of the pin shaft 203 points to the guide openings 102 a.

When the internal combustion engine performs the pipe connection operation, the first connecting disc 102 is opposite to the second connecting disc 202, and then the pin shaft 203 is inserted into the corresponding guide opening 102a to complete the fixation.

Example 2

Referring to fig. 1 to 5, a second embodiment of the present invention is based on the previous embodiment, and is different from the previous embodiment in that:

the annular groove 102b is formed in the first connecting disc 102, a distance from the inner side surface of the annular groove 102b to the center of the first connecting disc 102 is the same as a distance from the guide opening 102a to the center of the first connecting disc 102, the guide opening 102a is provided with a guide groove 102c penetrating through the annular groove 102b, and the guide groove 102c is inclined, namely, does not extend along the radial direction of the first connecting disc 102 or axially.

Specifically, the guide groove 102c includes a first end 102d and a second end 102e, that is, two ends of the guide groove 102c are divided into the first end 102d and the second end 102e, the first end 102d is communicated with the guide opening 102a, the second end 102e is communicated with the annular groove 102b, the distance from the guide groove 102c to the axis of the annular groove 102b is linearly increased from the first end 102d to the second end 102e, and the width of the guide opening 102a is consistent with the width of the guide groove 102 c. Therefore, the second end 102e of the guide groove 102c extends to the outer periphery of the annular groove 102b, and a surface of the guide groove 102c near the axial center is also formed with an inclined surface.

Furthermore, two side surfaces of the guide groove 102c are provided with wide grooves 102f extending along the axial direction, and the width of the wide grooves 102f is smaller than that of the guide groove 102 c; one end of the pin shaft 203 connected with the guide opening 102a is provided with a circular truncated cone 203a, and the diameter of the circular truncated cone 203a is larger than that of the pin shaft 203. The diameter of the pin 203 is smaller than the width of the wide groove 102f, and the diameter of the round table 203a is larger than the width of the wide groove 102f and smaller than the width of the guide opening 102 a.

Further, a screw thread is connected to the pin shaft 203, one end of the pin shaft 203, which is far away from the circular truncated cone 203a, is connected with a positioning nut 204, and the end surface of the positioning nut 204 is connected with the end surface of the second connecting disc 202 in a sliding manner; therefore, the positioning nut 204 limits the moving distance of the pin shaft 203 to the guide opening 102a when in operation; the pin shaft 203 is further connected with a positioning ring 205, the positioning ring 205 and the positioning nut 204 are respectively located on two end faces of the second connecting disc 202, and the positioning ring 205 is connected with the end face of the second connecting disc 202 in a sliding mode. The engagement of the retainer ring 205 with the retainer nut 204 limits the axial displacement of the pin 203 so that the pin 203 can only move in the radial direction of the second coupling plate 202 within the elongated slot 202 a.

It should be noted that in this embodiment, four guiding openings 102a, four elongated slots 202a, and four pin shafts 203 are provided, hooks 205a are provided on the positioning rings 205, two hooks 205a are symmetrically provided, a first spring 206 is connected between two adjacent positioning rings 205, and the first springs 206 are respectively connected to the hooks 205a of the two positioning rings 205. Therefore, the four positioning rings 205 are connected by the four first springs 206, and the elastic force of the four first springs 206 also causes the 4 pins 203 to be tightened toward the axis of the second connecting disc 202, and once a certain pin 203 moves toward the direction away from the axis of the second connecting disc 202, the pulling force of the first spring 206 tends to return.

Therefore, when the connection is performed, the second connection disc 202 is pushed to move towards the first connection disc 102 to enable the round table 203a to be embedded into the guide opening 102a, in the process of continuing to push, the round table 203a moves from the first end 102d to the second end 102e along the guide groove 102c, in the moving process, the pin 203 is located in the wide groove 102f, and the 4 pin 203 is spread outwards, that is, the first spring 206 is extended, once the round table 203a moves to the second end 102e and slides into the annular groove 102b, under the action of the first spring 206, the pin 203 contracts towards the circle center, at this time, the round table 203a is clamped in the annular groove 102b to limit the separation of the pin 203, and the connection process of the interface end 100 and the joint end 200 is completed.

Further, the above is only the process of assembly, and thus disassembly work is also required; specifically, the second connecting disc 202 is provided with an annular groove 202b, the second connecting disc 202 is divided into two parts by the annular groove 202b, an annular disc 207 is arranged in the annular groove 202b, and a through hole is arranged in the middle of the annular disc 207, so that the annular disc 207 is sleeved in the annular groove 202b, and the annular disc 207 can rotate in the annular groove 202 b.

The annular disc 207 is provided with a through adjusting groove 207a, the pin shaft 203 passes through the adjusting groove 207a, and the adjusting groove 207a is V-shaped. And the V-shaped tip of the adjustment groove 207a points in the direction of the center of the annular disc 207.

Specifically, the adjusting slot 207a is defined by two inclined surfaces 207b and an arc surface 207c, the two inclined surfaces 207b are symmetrical, the arc surface 207c is concentric with the annular disc 207, and the length of the intersection line of the arc surface 207c and the inclined surface 207b from the center of the annular disc 207 is greater than the length of the intersection line of the two inclined surfaces 207b from the center of the annular disc 207. Therefore, in a normal state, the pin 203 is located at the included angle formed by the two inclined surfaces 207b, during the plugging process, the pin 203 will move to the arc surface 207c at the included angle formed by the two inclined surfaces 207b of the adjusting groove 207a, and the movement of the pin 203 will not interfere with the state of the annular disc 207. When the joint end 200 needs to be detached, the annular disc 207 can be rotated, the inclined surface 207b of the adjusting groove 207a pushes the pin shaft 203 to move towards the joint of the arc surface 207c and the inclined surface 207b, namely, the inclined surface 207b drives the pin shaft 203 to move from the inner side to the outer side of the annular groove 102b until the pin shaft moves to the second end 102e, and then the joint end 200 can be detached.

Furthermore, a cylindrical groove 101b is arranged in the first through hole 101a, the inner diameter of the cylindrical groove 101b is larger than that of the first through hole 101a, a cylindrical body 103 is arranged in one end of the cylindrical groove 101b close to the joint end 200, the end of the cylindrical body 103 abuts against the first through hole 101a and can block the first through hole 101a, a second spring 104 is arranged between the cylindrical body 103 and the other end of the cylindrical groove 101b, the end of the cylindrical body 103 is pushed to abut against the first through hole 101a by the elastic force of the second spring 104, so that the cylindrical body 103 needs to be separated from the first through hole 101a when the circulation is to be opened, and a circulation groove 103a is arranged on the side surface of the cylindrical body 103, so that the fluid can be conveyed. Wherein the end of the cylindrical body 103 near the joint end 200 is tapered. Correspondingly, a fixed disk 208 is connected in the second through hole 201a, the fixed disk 208 is provided with a flow hole 208a, and the fixed disk 208 is further provided with an abutting rod 208b extending towards the interface end 100. When the mouthpiece end 100 and the mouthpiece end 200 are connected, the abutting rod 208b can push the cylindrical body 103 so that the flow groove 103a communicates with the first through hole 101 a.

Preferably, an annular boss 202c is disposed on an end surface of the second connecting disc 202, a sealing groove 102g is correspondingly disposed on an end surface of the first connecting disc 102, when the connecting disc is inserted, the annular boss 202c is embedded into the sealing groove 102g, and the annular boss 202c and the sealing groove 102g are mounted to prevent fluid leakage by a sealing ring.

The implementation mode and principle of the embodiment are as follows: the first connecting disc 102 is opposite to the second connecting disc 202, then the pin shaft 203 is inserted into the corresponding guide opening 102a, at this time, the round table 203a is embedded into the guide opening 102a, the second connecting disc 202 is pushed to move towards the first connecting disc 102, the round table 203a moves from the first end 102d to the second end 102e along the guide groove 102c, in this moving process, the pin shaft 203 is located in the wide groove 102f, and 4 pin shafts 203 are spread outwards, that is, the first spring 206 is stretched, once the round table 203a moves to the second end 102e and slides into the annular groove 102b, the pin shaft 203 contracts towards the center of the circle under the action of the first spring 206, at this time, the round table 203a is clamped in the annular groove 102b to limit the separation of the pin shaft 203, and the connection process of the interface end 100 and the joint end 200 is completed. When the joint end 200 needs to be detached, the annular disc 207 can be rotated, the inclined surface 207b of the adjusting groove 207a pushes the pin shaft 203 to move towards the joint of the arc surface 207c and the inclined surface 207b, namely, the inclined surface 207b drives the pin shaft 203 to move from the inner side to the outer side of the annular groove 102b until the pin shaft moves to the second end 102e, and then the joint end 200 can be detached.

It is important to note that the construction and arrangement of the present application as shown in the various exemplary embodiments is illustrative only. Although only a few embodiments have been described in detail in this disclosure, those skilled in the art who review this disclosure will readily appreciate that many modifications are possible, such as variations in sizes, dimensions, structures, shapes and proportions of the various elements, values of parameters such as temperature, pressure, etc., mounting arrangements, use of materials, colors, orientations, etc., without materially departing from the novel teachings and advantages of the subject matter recited in this application. For example, elements shown as integrally formed may be constructed of multiple parts or elements, the position of elements may be reversed or otherwise varied, and the nature or number of discrete elements or positions may be altered or varied. Accordingly, all such modifications are intended to be included within the scope of this invention. The order or sequence of any process or method steps may be varied or re-sequenced according to alternative embodiments. In the claims, any means-plus-function clause is intended to cover the structures described herein as performing the recited function and not only structural equivalents but also equivalent structures. Other substitutions, modifications, changes and omissions may be made in the design, operating conditions and arrangement of the exemplary embodiments without departing from the scope of the present inventions. Therefore, the present invention is not limited to a particular embodiment, but extends to various modifications that nevertheless fall within the scope of the appended claims.

Furthermore, in an effort to provide a concise description of the exemplary embodiments, all features of an actual implementation may not be described, i.e., those unrelated to the presently contemplated best mode of carrying out the invention, or those unrelated to enabling the invention.

It should be appreciated that in the development of any such actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort might be complex and time consuming, but would nevertheless be a routine undertaking of design, fabrication, and manufacture for those of ordinary skill having the benefit of this disclosure, without undue experimentation.

It should be noted that the above-mentioned embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.

Claims

1. An air intake apparatus for a gas turbine, characterized in that: comprises the steps of (a) preparing a mixture of a plurality of raw materials,

interface end (100) comprising an interface piece (101) arranged on a gas turbine, said interface piece (101) being provided with a first through hole (101 a), the end of said interface piece (101) being provided with a first connecting disc (102);

the joint end (200) comprises an air inlet pipe head (201) and a second connecting disc (202) connected with the end part of the air inlet pipe head (201), the air inlet pipe head (201) is provided with a second through hole (201 a), and the first connecting disc (102) is connected with the second connecting disc (202);

the end face, in contact with the second connecting disc (202), of the first connecting disc (102) is provided with guide openings (102 a) distributed along the circumference, the second connecting disc (202) is provided with long grooves (202 a), the number of the long grooves (202 a) is consistent with that of the guide openings (102 a), the positions of the long grooves (202 a) correspond to those of the guide openings, pin shafts (203) are arranged in the long grooves (202 a), and one ends of the pin shafts (203) point to the guide openings (102 a);

an annular groove (102 b) is formed in the first connecting disc (102), a guide groove (102 c) penetrating through the annular groove (102 b) is formed in the guide port (102 a), the guide groove (102 c) comprises a first end (102 d) and a second end (102 e), the first end (102 d) is communicated with the guide port (102 a), the second end (102 e) is communicated with the annular groove (102 b), the distance from the guide groove (102 c) to the axis of the annular groove (102 b) is increased linearly from the first end (102 d) to the second end (102 e), and the width of the guide port (102 a) is consistent with the width of the guide groove (102 c).

2. The gas turbine air intake apparatus of claim 1, wherein: two side surfaces of the guide groove (102 c) are provided with wide grooves (102 f) extending along the axial direction, and the width of each wide groove (102 f) is smaller than that of the guide groove (102 c);

one end of the pin shaft (203) connected with the guide opening (102 a) is provided with a circular truncated cone (203 a), and the diameter of the circular truncated cone (203 a) is larger than that of the pin shaft (203).

3. The gas turbine air intake apparatus of claim 2, wherein: the pin shaft (203) is connected with threads, one end, far away from the circular truncated cone (203 a), of the pin shaft (203) is connected with a positioning nut (204), and the end face of the positioning nut (204) is connected with the end face of the second connecting disc (202) in a sliding mode;

the hinge pin (203) is further connected with a positioning ring (205), the positioning ring (205) and the positioning nut (204) are respectively located on two end faces of the second connecting disc (202), and the positioning ring (205) is connected with the end face of the second connecting disc (202) in a sliding mode.

4. A gas turbine air intake apparatus according to claim 3, wherein: the four guide openings (102 a), the four elongated slots (202 a) and the four pin shafts (203) are arranged, hooks (205 a) are arranged on the positioning rings (205), a first spring (206) is connected between every two adjacent positioning rings (205), and the first springs (206) are connected to the hooks (205 a) of the two positioning rings (205) respectively.

5. The gas turbine air intake apparatus of claim 4, wherein: the second connecting disc (202) is provided with an annular groove (202 b), an annular disc (207) is arranged in the annular groove (202 b), a penetrating adjusting groove (207 a) is formed in the annular disc (207), the pin shaft (203) penetrates through the adjusting groove (207 a), and the adjusting groove (207 a) is V-shaped.

6. The gas turbine air intake apparatus of claim 5, wherein: the adjusting groove (207 a) is defined by two inclined surfaces (207 b) and an arc surface (207 c), the two inclined surfaces (207 b) are symmetrical, the arc surface (207 c) is concentric with the annular disc (207), and the length of the distance from the center of the annular disc (207) to the intersecting line of the arc surface (207 c) and the inclined surface (207 b) is greater than the length of the distance from the center of the annular disc (207) to the intersecting line of the two inclined surfaces (207 b).

7. The gas turbine air intake apparatus of claim 6, wherein: a cylindrical groove (101 b) is formed in the first through hole (101 a), the inner diameter of the cylindrical groove (101 b) is larger than that of the first through hole (101 a), a cylindrical body (103) is arranged in one end, close to the joint end (200), of the cylindrical groove (101 b), a second spring (104) is arranged between the cylindrical body (103) and the other end of the cylindrical groove (101 b), a circulation groove (103 a) is formed in the side face of the cylindrical body (103), and one end, close to the joint end (200), of the cylindrical body (103) is conical.

8. The gas turbine air intake apparatus of claim 7, wherein: a fixed disc (208) is connected in the second through hole (201 a), the fixed disc (208) is provided with a circulation hole (208 a), and the fixed disc (208) is also provided with an abutting rod (208 b) extending towards the interface end (100);

an annular boss (202 c) is arranged on the end face of the second connecting disc (202), and a sealing groove (102 g) is correspondingly arranged on the end face of the first connecting disc (102).