Aligning tool and method for guide vane adjusting mechanism

Abstract

The invention relates to an aligning tool and method for a guide vane adjusting mechanism, and belongs to the field of air compressor adjusting mechanisms. The aligning tool comprises an aligning ring, a plurality of fixing plates are evenly distributed on one side of the aligning ring, a plurality of clamping jaws are evenly distributed on the side, away from the fixing plates, of the aligning ring, pulling and dismounting rods are arranged on the fixing plates in a penetrating mode, and a cartridge receiver structure is arranged on the inner ring of the aligning ring in a clamped mode. A linkage ring is arranged on the casing structure in a sleeving mode, an adjusting piece making contact with the casing structure is arranged on the linkage ring in a penetrating mode, a fixing piece is arranged on the casing structure, the end, away from the casing structure, of the fixing piece makes contact with the linkage ring, and the clamping jaw is arranged between the linkage ring and the casing structure in an inserted mode. In the assembling process, the displacement of the linkage ring is limited, it is guaranteed that the distances between all positions of the linkage ring in the circumferential direction and the casing structure of the gas compressor are equal, the linkage ring and the casing structure are concentric during assembling, and therefore the precision of the guide vane adjusting mechanism is guaranteed, the assembling quality and aerodynamic performance of the gas compressor are further guaranteed, repeated assembling is prevented, and a large amount of secondary work is avoided; the time cost is saved, and the installation efficiency is improved.

Description

Technical Field

[0001] The invention belongs to the field of compressor regulating mechanisms, and in particular relates to a centering tool and method for a guide vane regulating mechanism. Background Art

[0002] The guide vane adjustment mechanism can adjust the rotation law of the guide vane, and then adjust the working range of the compressor, and improve the surge margin of the compressor. The guide vane adjustment mechanism usually includes components such as a drive device, a linkage ring and a rocker arm. The linkage ring is installed on the outer periphery of the casing. The drive device drives the linkage ring to rotate on the casing, and then the linkage ring drives the rocker arm to rotate, and finally the angle adjustment of each level of blades is achieved. During the rotation of the guide vane, if the linkage ring is eccentric, the guide vane adjustment law will be inaccurate at best, and the guide vane will be stuck and difficult to rotate at worst. Therefore, it is particularly important to ensure that the linkage ring is concentric with the casing axis.

[0003] In the prior art, when adjusting the concentricity of the linkage ring and the casing, a circumferential support stopper is usually installed on the linkage ring. After assembly, the distance between the linkage ring and the casing stopper is measured to determine whether they are concentric. However, there is no tooling to ensure the concentricity of the linkage ring and the casing during the assembly process. Whether they are concentric can only be determined by testing after assembly. If eccentricity occurs, repeated disassembly and assembly are required, and the installation efficiency is extremely low. Moreover, after installation, the distance between the linkage ring and the casing at different circumferential positions needs to be measured manually with a ruler, and the readings are visually observed. The ruler has low accuracy and the visual readings have large errors. Summary of the invention

[0004] In view of the above problems, the present invention provides a centering tool for a guide vane adjustment mechanism, comprising an aligning ring, a plurality of fixing plates are evenly distributed on one side of the aligning ring, a plurality of claws are evenly distributed on the side of the aligning ring away from the fixing plate, a pulling rod is passed through the fixing plate, a casing structure is clamped on the inner ring of the aligning ring, a linkage ring is sleeved on the casing structure, an adjusting piece in contact with the casing structure is passed through the linkage ring, a fixing piece is provided on the casing structure, an end of the fixing piece facing away from the casing structure is in contact with the linkage ring, and the claws are inserted between the linkage ring and the casing structure.

[0005] Furthermore, the centering ring is an integrated ring.

[0006] Furthermore, the centering ring includes a first half ring, a second half ring and a connecting piece, the first half ring and the second half ring are connected by the connecting piece, and an end of the first half ring contacts an end of the second half ring and is accommodated in the connecting piece.

[0007] Furthermore, the connecting member includes a first connecting plate, a second connecting plate and a fastener, and the first half ring and the second half ring are provided with a first connecting plate on one side close to the claw through the fastener, and the first half ring and the second half ring are connected to a second connecting plate on one side close to the fixed plate through the fastener.

[0008] A centering method for a guide vane adjusting mechanism, comprising the following steps:

[0009] Install the linkage ring on the casing structure;

[0010] Then insert the claw between the casing structure and the linkage ring, and install the inner ring of the centering ring on the casing structure;

[0011] Adjust the position of the linkage ring according to the preset target, and then adjust the fixing part so that one end of the fixing part away from the casing structure fixes the linkage ring;

[0012] Remove the centering ring by using a puller bar;

[0013] Adjust the adjusting part and fix the position of one end of the adjusting part passing through the linkage ring.

[0014] Further, the gap between the inner ring of the centering ring and the casing structure is 0 - 0.6 mm.

[0015] Further, the coaxiality between the centering ring and the casing structure is ≤ 0.06 mm.

[0016] Further, the gap between the inner ring surface of the linkage ring and the claw is 0 - 0.06 mm.

[0017] Further, the coaxiality between the linkage ring and the casing structure is ≤ 0.12 mm.

[0018] Further, the gap between one end of the adjusting part passing through the linkage ring and the casing structure is 0.03 - 0.06 mm.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] 1) In the present invention, through the centering ring and the claw, the displacement of the linkage ring is restricted during the assembly process, ensuring that the distances between the circumferential parts of the linkage ring and the casing structure of the compressor are equal, achieving concentricity between the linkage ring and the casing structure during assembly, thereby ensuring the accuracy of the guide vane adjusting mechanism, further guaranteeing the assembly quality and aerodynamic performance of the compressor, preventing repeated assembly, avoiding a large amount of secondary work, saving time costs, and improving the installation efficiency.

[0021] 2) The present invention does not require an artificial reading link, saving labor costs.

[0022] 3) In the present invention, a pulling force is applied to the fixing plate by using a puller bar to complete the disassembly of the centering ring, and the disassembly is convenient.

[0023] Other features and advantages of the present invention will be set forth in the following description, and in part will be obvious from the description, or may be learned by practice of the present invention. The objectives and other advantages of the present invention may be realized and attained by the structure particularly pointed out in the specification and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following briefly introduces the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0025] Figure 1 FIG. shows a schematic structural view of the centering tooling of the guide vane adjusting mechanism in the first embodiment;

[0026] Figure 2 FIG. shows Figure 1 a cross-sectional view of

[0027] Figure 3 FIG. shows a schematic view of the claw inserted between the linkage ring and the casing body;

[0028] Figure 4 FIG. shows a schematic connection view of the fixing member and the casing body;

[0029] Figure 5 FIG. shows a schematic connection view of the fixing member and the guide vane;

[0030] Figure 6 FIG. shows a schematic structural view of the linkage ring;

[0031] Figure 7 FIG. shows an assembly schematic view of the linkage ring and the casing body;

[0032] Figure 8 FIG. shows a schematic structural view of the centering tooling of the guide vane adjusting mechanism in the second embodiment;

[0033] Figure 9 FIG. shows a schematic view of the claw inserted between the linkage ring and the support platform;

[0034] Figure 10 FIG. shows a schematic view of the slider in contact with the support platform.

[0035] Figure numerals: 1. Aligning ring; 11. Clamping claw; 12. Fixing plate; 121. Pull-out rod; 13. First half ring; 14. Second half ring; 15. Connecting piece; 151. First connecting plate; 152. Second connecting plate; 153. Fastener; 2. Casing structure; 21. Casing body; 211. Stopper; 22. Support platform; 23. Guide vane; 3. Linkage ring; 31. Adjusting piece; 311. Adjusting screw; 312. Mounting nut; 313. Slider; 4. Fixing piece; 41. Rocker arm; 42. Fixing nut. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] Embodiment 1

[0038] Figure 1 FIG. 2 shows a schematic diagram of the structure of the centering tooling of the guide vane 23 adjustment mechanism in the first embodiment. Figure 1 As shown, a guide vane adjustment mechanism centering tool comprises a centering ring 1, and a plurality of fixing plates 12 are evenly distributed on one side of the centering ring 1. Figure 2 Shows Figure 1 A cross-sectional view of Figure 2 As shown, a plurality of claws 11 are evenly distributed on the side of the self-aligning ring 1 away from the fixed plate 12, a pull-out rod 121 is passed through the fixed plate 12, and a casing structure 2 is clamped on the inner ring of the self-aligning ring 1. Figure 6 The schematic diagram of the structure of the linkage ring 3 is shown. Figure 6 As shown, the casing structure 2 is sleeved with a linkage ring 3, the linkage ring 3 is penetrated with an adjusting member 31 in contact with the casing structure 2, the casing structure 2 is provided with a fixing member 4, and one end of the fixing member 4 facing away from the casing structure 2 is in contact with the linkage ring 3. Figure 3 A schematic diagram showing the insertion of the claw 11 between the linkage ring 3 and the casing body 21 is shown. Figure 3 As shown, the claw 11 is inserted between the linkage ring 3 and the casing structure 2 .

[0039] The centering tooling of the guide vane adjustment mechanism utilizes the centering ring 1 and the claws 11 to limit the displacement of the linkage ring 3 during the assembly process, ensuring that the circumferential spacing between the linkage ring 3 and the casing structure 2 of the compressor is equal, so that the linkage ring 3 and the casing structure 2 are concentric during assembly, thereby ensuring the accuracy of the guide vane adjustment mechanism, further ensuring the assembly quality and aerodynamic performance of the compressor, preventing repeated assembly, avoiding a large amount of secondary work, and saving time costs.

[0040] Specifically, the casing structure 2 in this embodiment is an integral casing structure 2. The integral casing structure 2 is prior art, so it will not be described in detail here.

[0041] In some embodiments, the receiver structure 2 includes a receiver body 21, a stop 211 is provided on the receiver body 21, the inner ring of the centering ring 1 is clamped in the stop 211, a linkage ring 3 is sleeved on the side of the receiver body 21 away from the inner ring of the centering ring 1, an adjusting piece 31 is passed through the linkage ring 3 and contacts the outer wall surface of the receiver body 21, and a fixing piece 4 is provided on the receiver body 21; the inner ring of the centering ring 1 is clamped in the stop 211, and can be centered by the stop 211, so that the centering ring 1 is coaxial with the receiver body 21, and it is also convenient to timely adjust the linkage ring 3 to be concentric with the receiver body 21.

[0042] In some embodiments, the centering ring 1 is an integrated ring, which facilitates timely adjustment of the linkage ring 3 and the casing body 21 to be concentric.

[0043] In some embodiments, the centering ring 1 is provided with a claw 11 near the outer ring to facilitate timely adjustment of the linkage ring 3 and the casing body 21 to be concentric.

[0044] In some embodiments, the adjusting member 31 includes an adjusting screw 311, a mounting nut 312 and a slider 313. The adjusting screw 311 passes through the linkage ring 3. The adjusting screw 311 is provided with a mounting nut 312 at a position between the head of the adjusting screw 311 and the linkage ring 3. One end of the adjusting screw 311 passing through the linkage ring 3 is provided with a slider 313 in contact with the receiver body 21; the mounting nut 312 is used to limit the length of the adjusting screw 311; the slider 313 is used to contact the outer wall surface of the receiver body 21; the adjusting screw 311 is used to limit the position of the slider 313.

[0045] In some embodiments, the claw 11 is disposed adjacent to the slider 313 to facilitate adjustment of the gap between the slider 313 and the outer wall of the receiver body 21 and the gap between the inner wall of the linkage ring 3 and the claw 11 .

[0046] Figure 4 FIG. 2 shows a schematic diagram of the connection between the fixing member 4 and the casing body 21. Figure 4 As shown, in some embodiments, the fixing member 4 includes a rocker arm 41 and a fixing nut 42.Figure 5 A schematic diagram showing the connection between the fixing member 4 and the guide vane 23 is shown. Figure 5 As shown, one end of the rocker arm 41 is connected to the guide vane 23 of the casing body 21 through a fixing nut 42, and the other end of the rocker arm 41 is in contact with the linkage ring 3; the guide vane 23 provides installation conditions for the rocker arm 41 and the fixing nut 42; the rocker arm 41 is used to fix the linkage ring 3; and the fixing nut 42 is used to limit the position of the rocker arm 41.

[0047] Specifically, one end of the guide vane 23 passing through the casing body 21 is connected to the rocker arm 41 through a fixing nut 42 .

[0048] A method for aligning a guide vane adjusting mechanism comprises the following steps:

[0049] Figure 7 FIG. 2 shows a schematic diagram of the assembly of the linkage ring 3 and the casing body 21. Figure 7 As shown, the linkage ring 3 is installed on the casing body 21, and the fixing nut 42 on the guide vane 23 is not tightened yet;

[0050] Then, the claw 11 is inserted between the casing body 21 and the linkage ring 3, and the claw 11 is adjacent to the slider 313, so that the inner ring of the self-aligning ring 1 is installed on the stop 211 of the casing body 21;

[0051] Adjust the position of the linkage ring 3 according to the preset target, tighten the fixing nut 42, and fix the linkage ring 3 at one end of the rocker arm 41 away from the casing body 21;

[0052] Insert the removal rod 121 into the fixing plate 12 and apply force to remove the self-aligning ring 1;

[0053] The mounting nut 312 is screwed to make the gap between the slider 313 and the outer wall surface of the casing body 21 be 0.03-0.06 mm, and then the mounting nut 312 is tightened to fix the position of the slider 313 so that the slider 313 contacts the outer wall surface of the casing body 21 .

[0054] In some embodiments, the gap between the inner ring of the centering ring 1 and the casing body 21 is 0-0.6 mm.

[0055] In some embodiments, the coaxiality between the centering ring 1 and the casing body 21 is ≤0.06 mm.

[0056] In some embodiments, the gap between the inner ring surface of the linkage ring 3 and the claw 11 is 0-0.06 mm.

[0057] In some embodiments, the gap between the outer wall surface of the receiver body 21 and the claw 11 is 0-0.06 mm.

[0058] In some embodiments, the coaxiality between the linkage ring 3 and the casing body 21 is ≤0.12 mm.

[0059] Embodiment 2

[0060] Figure 8 The schematic diagram of the structure of the centering tool of the guide vane 23 adjustment mechanism in the second embodiment is shown. Figure 8 As shown, a centering tool for a guide vane adjustment mechanism comprises a centering ring 1, a plurality of fixing plates 12 are evenly distributed on one side of the centering ring 1, a plurality of claws 11 are evenly distributed on the side of the centering ring 1 away from the fixing plate 12, a pull-out rod 121 is passed through the fixing plate 12, a casing structure 2 is clamped on the inner ring of the centering ring 1, a linkage ring 3 is sleeved on the casing structure 2, an adjusting member 31 in contact with the casing structure 2 is passed through the linkage ring 3, a fixing member 4 is provided on the casing structure 2, an end of the fixing member 4 away from the casing structure 2 is in contact with the linkage ring 3, and the claws 11 are inserted between the linkage ring 3 and the casing structure 2.

[0061] The centering tooling of the guide vane adjustment mechanism utilizes the centering ring 1 and the claws 11 to limit the displacement of the linkage ring 3 during the assembly process, ensuring that the circumferential spacing between the linkage ring 3 and the casing structure 2 of the compressor is equal, so that the linkage ring 3 and the casing structure 2 are concentric during assembly, thereby ensuring the accuracy of the guide vane adjustment mechanism, further ensuring the assembly quality and aerodynamic performance of the compressor, preventing repeated assembly, avoiding a large amount of secondary work, and saving time costs.

[0062] Specifically, the casing structure 2 in this embodiment is a half casing structure 2. The half casing structure 2 is prior art, so it will not be described in detail here.

[0063] In some embodiments, the casing structure 2 includes a casing body 21, a support platform 22 is provided on the casing body 21, the inner ring of the self-aligning ring 1 is clamped on the support platform 22, a linkage ring 3 is sleeved on the casing body 21, an adjusting member 31 in contact with the support platform 22 is passed through the linkage ring 3, a fixing member 4 is provided on the casing body 21, and an end of the fixing member 4 facing away from the casing body 21 is in contact with the linkage ring 3, Figure 9 The schematic diagram of the claw 11 inserted between the linkage ring 3 and the support platform 22 is shown. Figure 9 As shown, the clamping claw 11 is inserted between the linkage ring 3 and the support platform 22; the linkage ring 3 is provided with an adjusting piece 31 in contact with the support platform 22, so as to facilitate timely adjustment of the linkage ring 3 to be concentric with the casing body 21; the inner ring of the aligning ring 1 is clamped on the support platform 22, so as to facilitate the aligning ring 1 to be coaxial with the casing body 21; the fixing piece 4 is used to fix the position of the linkage ring 3.

[0064] In some embodiments, the centering ring 1 includes a first half-ring 13, a second half-ring 14, and a connecting member 15. The first half-ring 13 and the second half-ring 14 are connected by the connecting member 15. The end of the first half-ring 13 contacts the end of the second half-ring 14 and is accommodated within the connecting member 15. The connection of the first half-ring 13 and the second half-ring 14 by the connecting member 15 is applicable to the split casing structure 2, facilitating timely adjustment of the concentricity between the linkage ring 3 and the casing body 21.

[0065] In some embodiments, the connecting member 15 includes a first connecting plate 151, a second connecting plate 152, and a fastener 153. A first connecting plate 151 is provided on the side of the first half-ring 13 and the second half-ring 14 close to the claw 11 through the fastener 153, and a second connecting plate 152 is connected to the side of the first half-ring 13 and the second half-ring 14 close to the fixing plate 12 through the fastener 153. The first connecting plate 151 and the second connecting plate 152 can limit the connection positions on both sides of the first half-ring 13 and the second half-ring 14. The fastener 153 functions to connect the first connecting plate 151 and the second connecting plate 152, thereby realizing the connection between the first half-ring 13 and the second half-ring 14.

[0066] In some embodiments, the claw 11 is inserted between the support platform 22 of the linkage ring 3 and the casing body 21, facilitating adjustment of the gap between the slider 313 and the support platform 22 and the gap between the inner wall of the linkage ring 3 and the support platform 22.

[0067] In some embodiments, the centering ring 1 is provided with a claw 11 near the inner ring, facilitating timely adjustment of the concentricity between the linkage ring 3 and the casing body 21.

[0068] In some embodiments, the adjusting member 31 includes an adjusting screw 311, a mounting nut 312, and a slider 313. The adjusting screw 311 penetrates through the linkage ring 3, and a mounting nut 312 is provided at the position between the head of the adjusting screw 311 and the linkage ring 3. Figure 10 The schematic diagram showing the contact between the slider 313 and the support platform 22 is as Figure 10 shown. The end of the adjusting screw 311 passing through the linkage ring 3 is provided with a slider 313 that contacts the support platform 22. The mounting nut 312 is used to limit the length of the adjusting screw 311. The slider 313 is used to contact the support platform 22. The adjusting screw 311 is used to limit the position of the slider 313.

[0069] In some embodiments, the fixing member 4 includes a rocker arm 41 and a fixing nut 42. One end of the rocker arm 41 is connected to the guide vane 23 of the casing body 21 through the fixing nut 42, and the other end of the rocker arm 41 contacts the linkage ring 3. The guide vane 23 provides an installation condition for the rocker arm 41 and the fixing nut 42. The rocker arm 41 is used to fix the linkage ring 3. The fixing nut 42 is used to limit the position of the rocker arm 41.

[0070] Specifically, one end of the guide vane 23 passing through the casing body 21 is connected to the rocker arm 41 by a fixing nut 42.

[0071] An alignment method for a guide vane adjusting mechanism includes the following steps:

[0072] Install the linkage ring 3 on the support platform 22 of the casing body 21, and do not tighten the fixing nut 42 on the guide vane 23 for the time being;

[0073] Then insert the claw 11 between the support platform 22 of the casing body 21 and the linkage ring 3, so that the inner ring of the alignment ring 1 is installed on the support platform 22 of the casing body 21;

[0074] Adjust the position of the linkage ring 3 according to the preset target, and tighten the fixing nut 42 to fix the linkage ring 3 at the end of the rocker arm 41 away from the casing body 21;

[0075] Insert the pull rod 121 into the fixing plate 12 and apply a force to remove the alignment ring 1;

[0076] Turn the installation nut 312 to make the gap between the slider 313 and the support platform 22 of the casing body 21 be 0.03 - 0.06 mm, and then tighten the installation nut 312 to fix the position of the slider 313 so that the slider 313 contacts the support platform 22.

[0077] In some embodiments, the gap between the inner ring of the alignment ring 1 and the casing body 21 is 0 - 0.6 mm.

[0078] In some embodiments, the coaxiality between the alignment ring 1 and the casing body 21 is ≤ 0.06 mm.

[0079] In some embodiments, the gap between the inner ring surface of the linkage ring 3 and the claw 11 is 0 - 0.06 mm.

[0080] In some embodiments, the coaxiality between the linkage ring 3 and the casing body 21 is ≤ 0.12 mm.

[0081] Test:

[0082] During the assembly process of the turboshaft engine, the alignment tooling and alignment method of this embodiment are used for the alignment of the guide vane adjusting mechanism, and a data comparison table with the conventional method is obtained. See Table 1 specifically.

[0083] Linkage eccentricity mm Guide vane angle difference ° Conventional method 0.3 1.86 Centering tooling and centering method 0.05 0.29

[0084] Table 1

[0085] It can be seen from Table 1 that applying the centering tooling and centering method of this embodiment to the centering of the guide vane adjusting mechanism can greatly shorten the assembly time, and through simulation analysis and assembly measurement, the consistency of the adjustable guide vanes can be greatly improved.

[0086] Specifically, the conventional method here refers to measuring the distance between the linkage ring and the casing limiting device with a scale by hand after the circumferential support limiting device of the linkage ring is assembled to judge whether they are concentric.

[0087] Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A centering tool for a guide vane adjustment mechanism, characterized in that: The invention comprises a self-aligning ring (1), a plurality of fixing plates (12) are evenly distributed on one side of the self-aligning ring (1), a plurality of clamping claws (11) are evenly distributed on the side of the self-aligning ring (1) away from the fixing plate (12), a pull-out rod (121) is passed through the fixing plate (12), a casing structure (2) is clamped on the inner ring of the self-aligning ring (1), a linkage ring (3) is sleeved on the casing structure (2), an adjusting member (31) in contact with the casing structure (2) is passed through the linkage ring (3), a fixing member (4) is provided on the casing structure (2), one end of the fixing member (4) away from the casing structure (2) is in contact with the linkage ring (3), and the clamping claws (11) are inserted between the linkage ring (3) and the casing structure (2).

2. The centering tool of the guide vane adjustment mechanism according to claim 1, characterized in that: The centering ring (1) is an integrated ring.

3. The centering tool of the guide vane adjustment mechanism according to claim 1, characterized in that: The centering ring (1) comprises a first half ring (13), a second half ring (14) and a connecting piece (15); the first half ring (13) and the second half ring (14) are connected via the connecting piece (15); an end of the first half ring (13) contacts an end of the second half ring (14) and is accommodated in the connecting piece (15).

4. The centering tool of the guide vane adjustment mechanism according to claim 3, characterized in that: The connecting member (15) comprises a first connecting plate (151), a second connecting plate (152) and a fastener (153); the first connecting plate (151) is provided on a side of the first half ring (13) and the second half ring (14) close to the claw (11) via the fastener (153); the second connecting plate (152) is connected to a side of the first half ring (13) and the second half ring (14) close to the fixing plate (12) via the fastener (153).

5. A method for aligning a guide vane adjusting mechanism, characterized in that: The following steps are involved: Installing the linkage ring (3) on the casing structure (2); Then, the claw (11) is inserted between the casing structure (2) and the linkage ring (3), so that the inner ring of the self-aligning ring (1) is installed on the casing structure (2); The position of the linkage ring (3) is adjusted according to a preset target, and then the fixing member (4) is adjusted so that the fixing member (4) fixes the linkage ring (3) at one end facing away from the casing structure (2); Using a pulling rod (121) to remove the self-aligning ring (1); The adjusting member (31) is adjusted to fix the position of one end of the adjusting member (31) passing through the linkage ring (3).

6. The centering method of the guide vane adjustment mechanism according to claim 5, characterized in that: The gap between the inner ring of the centering ring (1) and the casing structure (2) is 0 to 0.6 mm.

7. The centering method of the guide vane adjustment mechanism according to claim 5, characterized in that: The coaxiality between the centering ring (1) and the casing structure (2) is ≤0.06 mm.

8. The centering method of the guide vane adjustment mechanism according to claim 5, characterized in that: The gap between the inner ring surface of the linkage ring (3) and the claw (11) is 0 to 0.06 mm.

9. The centering method of the guide vane adjustment mechanism according to claim 5, characterized in that: The coaxiality between the linkage ring (3) and the casing structure (2) is ≤0.12 mm.

10. The centering method of the guide vane adjustment mechanism according to claim 5, characterized in that: The gap between one end of the adjusting member (31) passing through the linkage ring (3) and the casing structure (2) is 0.03-0.06 mm.

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