Combined type holding ring structure and mounting method

Abstract

The invention discloses a combined type holding ring structure and an installation method, the combined type holding ring structure comprises a plurality of holding ring sections (1), a plurality of stationary blade ring sections (2) and pull rods (3), the stationary blade ring sections (2) are connected with the holding ring sections (1) and are arranged between the two holding ring sections (1), and the stationary blade ring sections (2) and the holding ring sections (1) are arranged in an embedded mode; the pull rod (3) penetrates through the plurality of holding ring sections (1), and the plurality of holding ring sections (1) are fixed through the pull rod (3); the holding ring sections (1) are circular ring-shaped, the stationary blade ring sections (2) are semicircular ring-shaped, the plurality of holding ring sections (1) and the plurality of stationary blade ring sections (2) are alternately arranged along the axial direction of the holding ring sections (1), and the stationary blade ring sections are embedded into the adjacent holding ring sections, so that the situation that the stationary blade ring sections need to slide into holding ring grooves along the circumferential direction in the traditional scheme is avoided, the mounting stroke is long, and the mounting efficiency is high. And clamping stagnation is easily caused by deformation, and repeated grinding is needed.

Description

Technical Field

[0001] The present invention relates to the field of heavy-duty gas engine compressors, and in particular to a combined ring holding structure and an installation method. Background Art

[0002] The existing technical solution is that the holding ring installed on the compressor cylinder is generally a split structure with an upper and lower halves, a flow channel is formed on the inner surface of the holding ring, and several levels of stationary blade ring grooves are processed on the holding ring for installing the stationary blade grid.

[0003] The stator blades are axially dovetailed, mounted axially on the outer ring. They are then divided into several segments (typically six) through assembly processing. The segmented segments are circumferentially installed into the stator ring grooves of each stage within the upper and lower retaining rings. The upper and lower retaining rings each hold three segments, and the entire retaining ring is finally installed into the compressor cylinder. While the aforementioned combined design of a split retaining ring and a multi-segment stator ring enables the initial assembly of stator ring segments, in actual industrial applications, the segmentation strategy and assembly logic still present the following challenges:

[0004] (1) Since the stator ring segment and the retaining ring are fitted with a small gap, the stator ring segment slides into the stator groove of the retaining ring along the circumferential direction. However, the stator ring segment is greatly deformed after segmentation, and the sliding stroke along the circumferential direction is long. The deformation control requirements of the retaining ring and the stator ring segment are high. After the stator ring segment is deformed, it can only be installed by grinding, which makes installation difficult.

[0005] (2) Since the existing technology adopts a cantilevered stator blade design, the stator blade body is prone to thermal deformation and vibration offset under high temperature and high pressure conditions. In order to compensate for the deformation error, the blade top needs to be manually trimmed to achieve the theoretical clearance value.

[0006] (3) It is difficult to disassemble and replace the stator ring segment and the stator blade. The stator ring segment needs to be slid out along the circumferential direction, and then the stator blade needs to be knocked out from the axial direction.

[0007] (4) It is difficult to install the reserved probe hole.

[0008] Patent document CN118959357 discloses a gas turbine compressor stator ring with shrouded stator blades, comprising a plurality of arc segments, each of which comprises an outer ring segment and a plurality of shrouded stator blades, wherein the shrouded stator blade comprises a blade body, the root end of the blade body is integrally connected to a blade root and the top end is integrally connected to a blade shroud, the blade root and the outer ring segment are detachably connected, the blade shroud comprises a first cutting surface and a second cutting surface, the first cutting surface of each shrouded stator blade is closely fitted with the second cutting surface of the adjacent shrouded stator blade, and the adjacent two shrouded stator blades are closely fitted with the blade root. The blade crowns are welded together, and the blade crowns of each shrouded stator blade in each arc segment are combined to form the inner ring segment of the arc segment. The outer ring segment in each arc segment is used to be fixedly connected to the holding ring of the compressor, and the inner ring segments in the two adjacent arc segments are sealed at the joints. However, the problems of the stator blade ring segment and the stator blade being greatly deformed after segmentation and needing to be ground before being installed during installation, disassembly and deformation control are not solved, and the cantilevered stator blade is prone to thermal deformation and vibration offset under high temperature and high pressure conditions, as well as the difficulty of reserving probe holes during installation, are not solved.

[0009] Patent document CN204402571U discloses a turbine holding ring for a gas turbine with adjustable cooling air flow. The turbine holding ring adopts an upper and lower half-ring structure, on which a number of cooling air holes are machined. A flow regulating structure is installed on each cooling air hole. The regulating structure includes an orifice plate, a pressure plate and bolts. The orifice plate is fixed at the inlet of the cooling air hole by the pressure plate and the bolts. The orifice plate is a group of orifice plates of different sizes, and the aperture of the orifice plate is smaller than the aperture of the cooling hole. The problem that the stator ring segments and the stator blades are greatly deformed after segmentation and need to be ground before they can be installed during installation, disassembly and deformation control is not solved, and the cantilevered stator blades are prone to thermal deformation and vibration offset under high temperature and high pressure conditions, as well as the difficulty of reserving probe holes during installation, disassembly and deformation control are not solved.

[0010] In summary, the above two existing patents have not solved the problems of the stator ring segments and the stator blades being greatly deformed after segmentation and requiring grinding before installation during installation, disassembly and deformation control, and the cantilevered stator blades being prone to thermal deformation and vibration offset under high temperature and high pressure conditions, as well as the difficulty of reserving probe holes during installation. Summary of the Invention

[0011] Based on the above technical problems, a combined ring holding structure and installation method are proposed to solve the problems of large deformation of the stator ring segments after segmentation and the need for grinding before installation during installation, disassembly and deformation control of the stator ring segments and stator blades, and the problem that cantilevered stator blades are prone to thermal deformation and vibration offset under high temperature and high pressure conditions, as well as the difficulty of reserving probe holes during installation.

[0012] To achieve the above objectives, the present invention proposes a combined ring holding structure.

[0013] A combined ring holding structure includes multiple ring holding segments, multiple stationary blade segments and a pull rod. The stationary blade segments are connected to the ring holding segments and are arranged between the ring holding segments. The stationary blade segments and the ring holding segments are interlockingly arranged; the pull rod passes through the multiple ring holding segments.

[0014] Furthermore, the ring holding segment is in a circular ring shape, the stationary blade segment is in a semicircular ring shape, multiple ring holding segments and multiple stationary blade segments are alternately arranged along the axial direction of the ring holding segment, and multiple ring holding segments are fixed by the pull rod.

[0015] Furthermore, the ring holding segment includes multiple end ring holding segments and multiple middle ring holding segments, and the end ring holding segments are used to connect to the combustion chamber or compressor; the material of the end ring holding segments is nickel-based high-temperature alloy, and the material of the middle ring holding segment is cobalt-based alloy.

[0016] Furthermore, a self-fusing sealing coating is provided between the end ring holding section and the middle ring holding section, and the self-fusing sealing coating is composed of a mixed coating of nickel-based high-temperature alloy powder and glass phase.

[0017] Furthermore, the ring holding segment includes a static blade groove, the static blade groove is arranged on both sides of the middle ring holding segment, and the static blade groove is arranged on one side of the end ring holding segment.

[0018] Furthermore, the stator blade groove and the stator blade ring segment are configured to be engageable, and the stator blade ring segment contacts the adjacent ring-holding segment by being embedded in the stator blade groove.

[0019] Furthermore, the ring holding segment includes a stop and a stop groove, the stop and the stop groove are arranged in the stationary blade groove, and the stop and the stop groove are engageable.

[0020] Furthermore, it also includes that the end ring holding section is adjacent to the stop or the stop groove, and the middle ring holding section includes the stop and the stop groove.

[0021] Furthermore, it also includes that the stop and the stop groove of the middle ring holding section are respectively arranged in the stationary blade grooves on both sides of the middle ring holding section.

[0022] Furthermore, the ring holding segment includes a semicircular screw hole, which is arranged on the side of the ring holding segment. The semicircular screw holes of adjacent ring holding segments are arranged correspondingly to form a complete threaded through hole along the radial direction of the ring holding segment.

[0023] Furthermore, the ring holding segment includes a plurality of mounting bosses, and the mounting bosses are arranged on the outer side of the ring holding segment, and the plurality of mounting bosses between different ring holding segments are correspondingly arranged.

[0024] Furthermore, the mounting boss includes a plurality of pull rod holes, and the pull rod holes pass through both sides of the ring holding segment. The pull rod holes on the plurality of mounting bosses on different ring holding segments are correspondingly arranged.

[0025] Furthermore, the pull rod passes through the pull rod hole to fix the plurality of ring holding segments.

[0026] Furthermore, the stator blade ring segment includes a plurality of stator blade ring segments, and the plurality of stator blade ring segments constitute the stator blade ring segment.

[0027] Furthermore, the stationary blade ring segment includes a connecting screw hole, and the connecting screw hole and the threaded through hole are arranged correspondingly.

[0028] Furthermore, the stationary blade ring segment includes a probe hole, and the probe hole is arranged on the outside of the stationary blade ring segment.

[0029] Furthermore, the ring holding segment includes a positioning pin, and the positioning pin is arranged on a side surface of the ring holding segment.

[0030] Furthermore, the ring holding segment further includes a positioning hole, which is provided on the side of the ring holding segment and at a corresponding position to the positioning pin on the adjacent ring holding segment, and the positioning hole and the positioning pin are engageable.

[0031] Based on the above-mentioned combined ring holding structure, the present invention also proposes an installation method.

[0032] A method for installing a combined ring holding structure, characterized by comprising:

[0033] S1: embed the blade into the stationary blade ring segment and string the pull rod into the ring holding segment;

[0034] S2: Alternately installing the plurality of ring-holding segments and the plurality of stationary blade segments.

[0035] Furthermore, the step S1 includes:

[0036] Fix one end ring holding segment and thread the pull rod into the pull rod hole of the ring holding segment.

[0037] Furthermore, the step S2 includes:

[0038] Inserting a plurality of stationary blade ring segments into the stationary blade grooves and splicing them into the stationary blade ring segment, and arranging the connecting screw holes on the stationary blade ring segment to correspond to the semicircular screw holes on the end ring holding segment;

[0039] Thread the pull rod into the middle ring holding section according to the corresponding position of the pull rod hole, embed the positioning pin into the positioning hole, install the middle ring holding section, screw the screw into the threaded through hole composed of two semicircular screw holes to fix it, repeat the above steps until the other end ring holding section is fixed.

[0040] Based on the above technical solution, the present invention has at least the following beneficial effects:

[0041] 1. The present invention proposes a combined ring holding structure and installation method. By embedding the stator ring segment into the adjacent ring holding segment, the problem of the traditional solution of sliding the stator ring segment into the ring holding groove along the circumferential direction, a long installation stroke, easy jamming due to deformation, and the need for repeated grinding is avoided; the stator ring segment is divided into multiple sections and constrained by side threaded holes, with a short installation stroke and a large tolerance range, and can be accurately positioned without grinding.

[0042] 2. The present invention proposes a combined holding ring structure and installation method, which adopts holding rings of different materials and sets them at different positions in the compressor cylinder, and optimizes the performance of the holding rings according to the working conditions and performance requirements of different areas in the compressor cylinder; the holding rings close to the combustion chamber can adopt high-strength, high-temperature resistant nickel-based high-temperature alloy; the middle holding ring adopts cobalt-based alloy for corrosion resistance, and a self-melting sealing coating is also provided between different holding rings, in which the glass phase can self-melt at high temperature and fill the tiny gaps between different holding rings, making the multi-holding ring structure of the present invention more compact, ensuring the stability and sealing of the structure under complex and harsh operating environment, and significantly improving the high-temperature creep resistance and corrosion resistance of the holding rings, thereby extending the service life of the holding rings, reducing maintenance costs, and improving the overall operating efficiency and reliability of the gas turbine.

[0043] 3. This invention proposes a modular ring-holding structure and installation method, optimizing circumferential sliding installation for modular direct installation. By simplifying the segmented design of the stationary blade ring segments and adding side restraint structures, the installation difficulty is significantly reduced, making the assembly process simpler and more efficient. Furthermore, the improved structural design facilitates subsequent maintenance, significantly reducing repair time and workload. The optimized layout of the test probe holes also facilitates inspection work.

[0044] 4. This invention proposes a modular retaining ring structure and installation method that effectively addresses the difficulty in accurately controlling blade tip clearance in traditional designs. By optimizing the segmented retaining ring design and installation positioning, precise control of blade tip clearance is achieved, eliminating the need for repeated grinding and adjustment required in traditional processes. This improved design not only enhances the accuracy of clearance control but also provides better dynamic adjustment capabilities to meet the needs of diverse operating conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] The accompanying drawings, which constitute part of the present invention, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an undue limitation of the present invention. In the accompanying drawings:

[0046] Figure 1 A schematic structural diagram of a combined ring holding structure according to an embodiment is shown;

[0047] Figure 2 An exploded view of a combined ring holding structure according to one embodiment is shown;

[0048] Figure 3 A front view of a combined ring holding structure according to one embodiment is shown;

[0049] Figure 4 A schematic diagram of the three-dimensional structure of a ring holding segment according to an embodiment is shown.

[0050] The above drawings include the following reference numerals:

[0051] 1. Ring holding segment; 2. Stationary blade segment; 3. Pull rod; 4. Positioning pin; 5. Blade;

[0052] 11. End ring holding section; 12. Middle ring holding section; 13. Stationary blade slot; 14. Semicircular screw hole; 15. Threaded through hole; 16. Mounting boss; 17. Positioning hole; 18. Stopper; 19. Stopper slot;

[0053] 21. Stationary blade ring segment; 22. Connecting screw hole; 23. Probe hole;

[0054] 161. Pull rod hole. DETAILED DESCRIPTION

[0055] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0056] The present invention is described in further detail below with reference to specific embodiments. These embodiments are not to be construed as limiting the scope of protection claimed by the present invention. The term "including" when used indicates the presence of a feature, but does not exclude the presence or addition of one or more other features; the terms "lateral", "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for ease of description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be construed as limiting the present invention; in addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be construed as indicating or implying relative importance.

[0057] In this description, it should be noted that, unless otherwise specified or limited, the terms "installed," "connected," and "connected" should be understood broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to direct connections, indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art will understand the specific meanings of these terms in the present invention. Furthermore, in the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0058] Example

[0059] The present invention proposes a combined ring holding structure, such as Figure 1 As shown in the figure, it includes multiple ring holding segments 1, multiple stationary blade segments 2 and pull rods 3. The stationary blade segments 2 are connected to the ring holding segments 1 and are arranged between two of the ring holding segments 1. The stationary blade segments 2 and the ring holding segments 1 are interlockingly arranged; the pull rods 3 pass through the multiple ring holding segments 1.

[0060] Furthermore, in the present invention, "interlockable arrangement" means that two or more mechanical components can be docked together through a specific interface or joint surface design to form a complete structure or system. This arrangement requires that the interface or joint surface shape, size and locking mechanism between the components match.

[0061] Further, if Figure 1 The ring holding structure shown in the figure is composed of two end ring holding segments 11, multiple middle ring holding segments 12, and static blade ring segments 2 alternately arranged between all the ring holding segments 1. The ring holding segment 1 is a circular ring structure. Preferably, the static blade ring segment 2 is semicircular, and the two static blade ring segments 2 form a complete circular ring arranged between the two ring holding segments 1. In other embodiments, the central angle corresponding to the static blade ring segment 2 can also be set to 120° or 90°.

[0062] Furthermore, the end ring holding segment 11 is connected to the combustion chamber or the compressor. Preferably, the material of the end ring holding segment 11 is a nickel-based high-temperature alloy, and the material of the middle ring holding segment 12 is a cobalt-based alloy. In other embodiments, the material of the end ring holding segment 11 and the middle replacement can also be a cobalt-based high-temperature alloy, stainless steel or titanium-based alloy.

[0063] Furthermore, a self-fusing sealing coating 10 is provided on the connecting surface between the ring-holding segments 1. In this embodiment, the self-fusing sealing coating 10 is composed of a mixed coating of nickel-based high-temperature alloy powder and glass phase. During the operation of the gas turbine, the glass phase is melted at high temperature to make the bonding structure of the ring-holding segments 1 tighter.

[0064] Furthermore, the stationary blade ring segment 2 and the stationary blade groove 13 of the ring holding segment 1 are configured to be engageable, and the stationary blade ring segment 2 is respectively engaged and fastened in the stationary blade grooves 13 of the two ring holding segments 1 on both sides.

[0065] Furthermore, the interior of the stationary blade slot 13 also includes a stop 18 and a stop groove 19. The stationary blade slot 13 of the end ring holding segment 11 includes a stop 18 or a stop groove 19, and the stationary blade slots 13 on both sides of the middle ring holding segment 12 respectively include a stop 18 and a stop groove 19. The stop 18 and the stop groove 19 are both annular structures, and the stop 18 and the stop groove 19 of the connected holding ring segment 1 can be interlocked.

[0066] Further, if Figure 2 : An exploded view of a combined ring holding structure is shown, wherein the ring holding segment 1 includes a plurality of mounting bosses 16. Preferably, four mounting bosses 16 are provided in one ring holding segment 1, and the four mounting bosses 16 are distributed along the circumference of the ring holding segment 1. The central angle formed between two adjacent mounting bosses 16 is 90°. In other embodiments, three mounting bosses 16 or a maximum of six mounting bosses 16 can also be provided.

[0067] Further, if Figure 2 As shown in , the mounting boss 16 includes two tie rod holes 161 , and multiple tie rods 3 pass through the tie rod holes 161 and run through the entire combined ring holding structure to fix the positions of multiple ring holding segments 1 .

[0068] Further, if Figure 2 As shown in the figure, the ring holding segment 1 also includes a semicircular screw hole 14, which passes through the corresponding inner and outer sides of the ring holding segment 1. The semicircular screw holes 14 on adjacent ring holding segments 1 are correspondingly arranged to form a complete threaded through hole 15. The stationary blade ring segment 2 includes a connecting screw hole 22, which is arranged at a position corresponding to the threaded through hole 15 to fasten the stationary blade ring segment 2; the stationary blade ring segment 21 is also provided with a probe hole 23, which also passes through the ring holding segment 1 so that the internal wiring can extend from the blade 4 to the outside of the ring holding structure.

[0069] Further, combined with Figure 2 、 Figure 3 and Figure 4 The end ring holding segment 11 shown in the figure includes a positioning pin 4 or a positioning hole 17, and the middle ring holding segment 12 includes a positioning pin 4 and a positioning hole 17. The positioning pins 4 and positioning holes 17 of adjacent ring holding segments 1 are arranged at corresponding positions and can be interlocked to fasten multiple ring holding segments 1.

[0070] Further, if Figure 3 As shown in FIG, the positioning pins 4 are arranged on both sides of the ring holding segment 1.

[0071] To achieve the above object, the present invention further proposes a method for installing a combined ring holding structure, comprising the following steps:

[0072] S1: embed the blade 5 into the stationary blade ring segment 2, and string the tie rod 3 into the ring holding segment 1;

[0073] S2: Alternately installing the plurality of ring-holding segments 1 and the plurality of stationary blade segments 2 in correspondence.

[0074] Furthermore, step S1 includes:

[0075] like Figure 2 As shown in , according to the installation direction, fix one end ring holding segment 11 and string the pull rod 3 into the pull rod hole 161 of the ring holding segment 1.

[0076] Furthermore, step S2 includes:

[0077] Insert multiple stationary blade segments 21 into the stationary blade slots 13 and assemble them into the stationary blade segment 2, and set the connecting screw holes 22 on the stationary blade segment 2 to correspond to the semicircular screw holes 14 on the end ring segment 11;

[0078] Thread the pull rod 3 into the middle ring holding section 12 according to the corresponding position of the pull rod hole 161, embed the positioning pin 4 into the positioning hole 17, install the middle ring holding section 12, screw the screw into the threaded through hole 15 composed of two semicircular screw holes 14 to fix it, and repeat the above steps until the other end ring holding section 11 is fixed.

[0079] In summary, it can be seen from the above description that the above embodiments of the present invention achieve the following technical effects:

[0080] 1. The present invention proposes a combined ring holding structure and installation method. By embedding the stator ring segment into the adjacent ring holding segment, the problem of the traditional solution of sliding the stator ring segment into the ring holding groove along the circumferential direction, a long installation stroke, easy jamming due to deformation, and the need for repeated grinding is avoided; the stator ring segment is divided into multiple sections and constrained by side threaded holes, with a short installation stroke and a large tolerance range, and can be accurately positioned without grinding.

[0081] 2. The present invention proposes a combined holding ring structure and installation method, which adopts holding rings of different materials and sets them at different positions in the compressor cylinder, and optimizes the performance of the holding rings according to the working conditions and performance requirements of different areas in the compressor cylinder; the holding rings close to the combustion chamber can adopt high-strength, high-temperature resistant nickel-based high-temperature alloy; the middle holding ring adopts cobalt-based alloy for corrosion resistance, and a self-melting sealing coating is also provided between different holding rings, in which the glass phase can self-melt at high temperature and fill the tiny gaps between different holding rings, making the multi-holding ring structure of the present invention more compact, ensuring the stability and sealing of the structure under complex and harsh operating environment, and significantly improving the high-temperature creep resistance and corrosion resistance of the holding rings, thereby extending the service life of the holding rings, reducing maintenance costs, and improving the overall operating efficiency and reliability of the gas turbine.

[0082] 3. This invention proposes a modular ring-holding structure and installation method, optimizing circumferential sliding installation for modular direct installation. By simplifying the segmented design of the stationary blade ring segments and adding side restraint structures, the installation difficulty is significantly reduced, making the assembly process simpler and more efficient. Furthermore, the improved structural design facilitates subsequent maintenance, significantly reducing repair time and workload. The optimized layout of the test probe holes also facilitates inspection work.

[0083] 4. This invention proposes a modular retaining ring structure and installation method that effectively addresses the difficulty in accurately controlling blade tip clearance in traditional designs. By optimizing the segmented retaining ring design and installation positioning, precise control of blade tip clearance is achieved, eliminating the need for repeated grinding and adjustment required in traditional processes. This improved design not only enhances the accuracy of clearance control but also provides better dynamic adjustment capabilities to meet the needs of diverse operating conditions.

[0084] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

[0085] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

[0086] It should be noted that, in the description of this specification, the reference terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples, unless they are contradictory.

Claims

1. A combined ring holding structure, characterized in that: The invention comprises a plurality of ring holding segments (1), a plurality of stationary blade segments (2) and a pull rod (3), wherein the stationary blade segment (2) is connected to the ring holding segment (1) and is arranged between two of the ring holding segments (1), and the stationary blade segment (2) and the ring holding segment (1) are arranged to be interlocked; and the pull rod (3) passes through the plurality of ring holding segments (1).

2. The ring holding structure according to claim 1, characterized in that: The ring holding segment (1) is in the shape of a circular ring, the stationary blade segment (2) is in the shape of a semicircular ring, a plurality of the ring holding segments (1) and a plurality of the stationary blade segments (2) are alternately arranged along the axial direction of the ring holding segment (1), and the plurality of the ring holding segments (1) are fixed by the pull rod (3).

3. The ring holding structure according to claim 1, characterized in that: The ring holding segment (1) comprises a plurality of end ring holding segments (11) and a plurality of middle ring holding segments (12). The end ring holding section (11) is used for connecting to a combustion chamber or a compressor; the material of the end ring holding section (11) is a nickel-based high-temperature alloy, and the material of the middle ring holding section (12) is a cobalt-based alloy.

4. The ring holding structure according to claim 3, characterized in that: A self-melting sealing coating (10) is further provided between the end ring holding section (11) and the middle ring holding section (12). The self-fusing sealing coating (10) is composed of a mixed coating of nickel-based high-temperature alloy powder and glass.

5. The ring holding structure according to claim 3, characterized in that: The ring holding segment (1) comprises a stationary blade slot (13), The stationary blade groove (13) is provided on both sides of the middle ring holding section (12), and the stationary blade groove (13) is provided on one side of the end ring holding section (11).

6. The ring holding structure according to claim 5, characterized in that: The stationary blade groove (13) and the stationary blade ring segment (2) are arranged to be engageable, and the stationary blade ring segment (2) contacts the adjacent ring holding segment (1) by being embedded in the stationary blade groove (13).

7. The ring holding structure according to claim 5, characterized in that: The ring holding segment (1) comprises a stopper (18) and a stopper groove (19). The stopper (18) and the stopper groove (19) are adjacent to the stationary blade groove (13), and the stopper (18) and the stopper groove (19) are arranged to be fit together.

8. The ring holding structure according to claim 7, characterized in that: Also includes, The end ring holding section (11) includes the stop (18) or the stop groove (19), and the middle ring holding section (12) includes the stop (18) and the stop groove (19).

9. The ring holding structure according to claim 7, characterized in that: Also includes, The stopper (18) and the stopper groove (19) of the middle ring holding section (12) are respectively arranged in the stationary blade grooves (13) on both sides of the middle ring holding section (12).

10. The ring holding structure according to claim 1, characterized in that: The ring holding segment (1) comprises a semicircular screw hole (14), The semicircular screw hole (14) is arranged on the side of the ring holding segment (1), and the semicircular screw holes (14) of adjacent ring holding segments (1) are arranged correspondingly, forming a complete threaded through hole (15) along the radial direction of the ring holding segment (1).

11. The ring holding structure according to claim 1, characterized in that: The ring holding segment (1) comprises a plurality of mounting bosses (16), The mounting boss (16) is arranged on the outside of the ring holding segment (1), and a plurality of the mounting bosses (16) are correspondingly arranged between different ring holding segments (1).

12. The ring holding structure according to claim 11, characterized in that: The mounting boss (16) includes a plurality of tie rod holes (161). The pull rod hole (161) passes through both sides of the ring holding segment (1), and the pull rod holes (161) on the multiple mounting bosses (16) on different ring holding segments (1) are correspondingly arranged.

13. The ring holding structure according to claim 12, characterized in that: The pull rod (3) passes through the pull rod hole (161) to fix the plurality of ring holding segments (1).

14. The ring holding structure according to claim 1, characterized in that: The stationary blade ring segment (2) includes a plurality of stationary blade ring segments (21), A plurality of the stationary blade ring segments (21) constitute the stationary blade ring segment (2).

15. The ring holding structure according to claim 10, characterized in that: The stationary blade ring segment (2) includes a connecting screw hole (22), The connecting screw hole (22) and the threaded through hole (15) are arranged correspondingly.

16. The ring holding structure according to claim 1, characterized in that: The stationary blade ring segment (2) includes a probe hole (23), The probe hole (23) is arranged outside the stationary blade ring segment (2).

17. The ring holding structure according to claim 1, characterized in that: The ring holding segment (1) comprises a positioning pin (4), The positioning pin (4) is arranged on the side surface of the ring holding segment (1).

18. The ring holding structure according to claim 17, characterized in that: The ring holding segment (1) further comprises a positioning hole (17), The positioning hole (17) is provided on the side of the ring holding segment (1) and is located at a corresponding position to the positioning pin (4) on the adjacent ring holding segment (1). The positioning hole (17) and the positioning pin (4) are configured to be engageable.

19. A method for installing the combined ring holding structure according to any one of claims 1 to 18, characterized in that: include: S1: embedding the blade (5) into the stationary blade ring segment (2), and stringing the pull rod (3) into the ring holding segment (1); S2: Alternately installing the plurality of ring-holding segments (1) and the plurality of stationary blade segments (2).

20. The method according to claim 19, characterized in that The step S1 includes: An end ring holding segment (11) is fixed, and the pull rod (3) is threaded into the pull rod hole (161) of the ring holding segment (1).

21. The method according to claim 19, wherein: The step S2 includes: Inserting a plurality of stationary blade ring segments (21) into the stationary blade grooves (13) and splicing them into the stationary blade ring segment (2), and arranging the connecting screw holes (22) on the stationary blade ring segment (2) and the semicircular screw holes (14) on the end ring holding segment (11) correspondingly; Insert the pull rod (3) into the middle ring holding section (12) according to the corresponding position of the pull rod hole (161), embed the positioning pin (4) into the positioning hole (17), install the middle ring holding section (12), screw the screw into the threaded through hole (15) composed of two semicircular screw holes (14) to fix it, and repeat the above steps until the other end ring holding section (11) is fixed.

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