Guide vane fixing device

Abstract

The present invention discloses a guide vane fixing device, which is used to fix the guide vane of an aircraft engine to a turbine casing. The guide vane fixing device includes a support assembly, a pivot shaft assembly, a plurality of hanging rods and a plurality of hook assemblies. The support assembly is used to be connected to the turbine casing; the pivot shaft assembly is connected to the support assembly; one end of the hanging rod is pivoted to the pivot shaft assembly, and the other end of the hanging rod extends radially along the pivot shaft assembly; the hook assembly is connected to the hanging rod, and the hook assembly is used to fix the guide vane from the end of the guide vane. In the guide vane fixing device of the present invention, the hook assembly is connected to the support assembly through the hanging rod and the pivot shaft assembly, and the end of the guide vane is fixed by the hook assembly. In the process of installing the guide vane to the turbine casing, the hook assembly fixes the guide vane away from one end of the turbine casing, so that the two ends of the guide vane are kept horizontal, so as to avoid the situation where the guide vane is stuck due to the different heights at the two ends of the guide vane, thereby improving the installation efficiency of the guide vane.

Description

Technical Field

[0001] The invention relates to the field of aero engines, and in particular to a guide vane fixing device. Background Art

[0002] like Figure 1 As shown, the low-pressure turbine stator of the aircraft engine is composed of multiple stages of stators, and each stage of stator is composed of multiple guide vanes 3' (sector segments) to form a complete ring and then fixed on the turbine casing 1'. The fixing method of the guide vane 3' is as follows Figure 2 As shown, a slot is provided on one side of each guide vane 3' close to the front end of the turbine casing 1', and the guide vane 3' is mounted on the turbine casing 1' and the end edge plate of the front-stage outer ring. After the guide vane 3' of this stage forms a complete ring, the end of the guide vane 3' is pressed from the rear end direction of the turbine casing 1' by the retaining ring 4' to limit its axial movement along the turbine casing 1', and then the guide vane 3' is clamped on the turbine casing 1' through the slot of the rear-stage outer ring 5' to limit the radial movement of the guide vane 3' along the turbine casing 1'. The assembly mode of the guide vane 3' is piece by piece. After the complete ring is formed, the retaining ring 4' and the rear-stage outer ring 5' are installed in sequence to fix the guide vane 3' of this stage on the turbine casing 1'. Since the fixing structure of the guide vane 3' is similar to a cantilever beam, during the assembly of the guide vane 3', the inner side of the guide vane 3' is tilted toward the front end direction of the turbine casing 1' due to the influence of gravity, so that the guide vane 3' cannot be hung on the inner wall of the casing. In the conventional assembly process, a pad 2' needs to be placed on the front-stage guide vane 3' to support the rear-stage guide vane 3' from the inside. Since the profile of the guide vane 3' is an irregular plane, the pad 2' cannot be placed horizontally, so that each pad 2' is of different heights, resulting in the rear-stage guide vanes 3' being misaligned and uneven. The overlapping surfaces of adjacent guide vanes 3' are inclined overlaps. When the guide vanes 3' are of different heights, the adjacent guide vanes 3' will bite each other, making the guide vanes 3' unable to move. Once the guide vanes 3' are stuck in installation, the pad 2' needs to be replaced and the placement height of each guide vane 3' needs to be adjusted. The debugging cycle is long, making the installation efficiency of the guide vanes 3' low. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a guide vane fixing device in order to overcome the defect in the prior art that the guide vanes are easily uneven in height and adjacent guide vanes are bitten into each other when the guide vanes are supported by pads.

[0004] The present invention solves the above technical problems through the following technical solutions:

[0005] A guide vane fixing device, used for fixing the guide vane of an aircraft engine to a turbine casing, the guide vane fixing device comprising:

[0006] a support assembly for connection to the turbine casing;

[0007] a pivot shaft assembly connected to the support assembly;

[0008] A plurality of hanging rods, one end of each hanging rod is pivotally mounted on the pivot shaft assembly, and the other end of each hanging rod extends radially along the pivot shaft assembly;

[0009] A plurality of hook components are connected to the hanging rod, and the hook components are used to fix the guide vane from the end of the guide vane.

[0010] In the present solution, the hook assembly is connected to the support assembly through a hanging rod and a pivot shaft assembly. The hook assembly is used to fix the end of the guide vane. During the process of installing the guide vane to the turbine casing, after one end of the guide vane is fixed to the turbine casing, the hook assembly fixes the end of the guide vane away from the turbine casing, so that the two ends of the guide vane remain horizontal, avoiding the situation where the guide vane is stuck to each other due to one end being suspended in the air and the two ends of the guide vane being at different heights, thereby improving the guide vane installation efficiency.

[0011] Preferably, the axis of the pivot shaft assembly is parallel to or coincides with the axis of the turbine casing.

[0012] In the present scheme, the axis of the pivot shaft assembly is arranged parallel to the axis of the turbine casing, the hanging rod is arranged perpendicular to the axis of the pivot shaft assembly, the hook assembly is arranged perpendicular to the hanging rod and fixes the guide vane in the vertical direction, and the tension applied to the hanging rod by the hook assembly is in the vertical direction, thereby avoiding the component of force applied to the hanging rod by the hook assembly along the axial direction of the hanging rod, thereby reducing the displacement of the hook assembly along the hanging rod.

[0013] Preferably, the pivot shaft assembly is detachably connected to the support assembly.

[0014] In this solution, the pivot shaft assembly is arranged to be detachably connected to the support assembly, and the support assembly and the pivot shaft assembly are assembled according to the size of the turbine casing and the size of the guide vane to be tightened, thereby improving the versatility of the guide vane fixing device.

[0015] Preferably, the pivot shaft assembly includes a locking member and a pivot shaft body, the pivot shaft body is penetrated by the hanging rod and the supporting assembly, and the locking member is lockingly connected to the pivot shaft body.

[0016] In the present scheme, by setting a pivot shaft body and a locking piece, when the locking piece is not locked to the pivot shaft body, the hanging rod can rotate around the pivot shaft body to align with the middle section of the guide vane. After centering, the locking piece and the pivot shaft body are locked to lock the circumferential position of the hanging rod around the pivot shaft body, so that the pivot shaft body and the hanging rod can switch between pivotable and locked states, thereby improving the flexibility of the hanging rod around the pivot shaft, ensuring that the hanging rod can be aligned with the middle section of the guide vane, and avoiding the pulling force of the hanging rod on the guide vane to generate a rotational torque due to not being on the middle section of the guide vane, causing the guide vane to overturn.

[0017] Preferably, the hanging rod is arranged below the supporting assembly.

[0018] In the present solution, by setting the hanging rod below the supporting assembly, when the hook assembly is hung on the hanging rod, the hook assembly will not interfere with the supporting assembly arranged above the hanging rod, and the hook assembly can arbitrarily adjust its position along the entire circumferential direction of the pivot shaft assembly to ensure that it is completely aligned with the middle section of the guide vane, ensuring that the pulling force of the hook assembly on the guide vane is on the middle section of the guide vane, thereby preventing the pulling force of the hanging rod on the guide vane from generating a rotational torque due to not being on the middle section of the guide vane, causing the guide vane to overturn.

[0019] Preferably, a pivot ring is provided at one end of the hanging rod, and the pivot ring is pivotally mounted on the pivot shaft assembly.

[0020] In the present scheme, the hanging rod is pivoted to the pivot shaft assembly by setting a pivot ring, so that the main body of the hanging rod can be set to be narrower than the pivot shaft body. Since multiple hanging rods are overlapped and pivoted to the pivot shaft, the width of the hanging rod body is narrow to avoid interference between the hook assembly suspended on the upper hanging rod and the hanging rod located below, ensuring that the hook assemblies suspended on different hanging rods can all droop in the direction of gravity to tighten the guide vane vertically upward, ensuring that the force tightening the guide vane is in the vertical direction upward.

[0021] Preferably, the hook assembly is movably connected to the hanging rod, and the hook assembly can move along the axial direction of the hanging rod.

[0022] In the present solution, by setting the hook assembly to be movable along the axial direction of the hanging rod, the position of the hook assembly along the axial direction of the hanging rod can be flexibly adjusted according to the size of the tightened guide vane, so as to ensure that the hook assembly can tighten the guide vane in the vertical direction, avoid the tensioning force of the hook assembly on the guide vane also having a component force in the non-vertical upward direction, ensure that the tension of the hook assembly on the guide vane is only used to balance the gravity of the guide vane and will not pull the guide vane in other directions, thereby improving the stability of the hook assembly in tightening the guide vane.

[0023] Preferably, the hook assembly comprises a connecting member and a hook, and the hook is connected to an end of the hanging rod away from the pivot shaft assembly through the connecting member.

[0024] In the present scheme, a hanging rod is radially arranged on the turbine casing, and a hook is hung on the hanging rod. The hook hangs down vertically along the axial direction of the turbine casing, so that the pulling force of the hook on the guide vane is vertically upward. The pulling force of the hook on the guide vane is theoretically completely along the gravity direction of the guide vane, avoiding the pulling force of the hook on the guide vane to produce a component force not in the gravity direction of the guide vane, thereby improving the stability of the tensioning of the guide vane by the hook.

[0025] Preferably, the hook comprises a clamping portion and a connecting portion, the two sides of the connecting portion are respectively fixed with clamping portions, the cross section of the hook is in a side "U" shape, and the distance between the two clamping portions matches the width of the guide vane end.

[0026] In this solution, the hook is shaped like a side "U" and is clamped to one end of the guide vane when in use. The clamping of the hook and the guide vane is reliable and easy to disassemble. The hook can be quickly and conveniently clamped to the guide vane, thereby improving the installation efficiency of the guide vane.

[0027] Preferably, the support assembly includes a transverse plate and two longitudinal plates, the two longitudinal plates are fixedly connected to the two ends of the transverse plate, the support assembly is in an inverted "U" shape, and the longitudinal plate is provided with a snap-in groove at one end away from the transverse plate, and the snap-in groove matches the upper edge of the turbine casing.

[0028] In this solution, the support assembly is connected to the turbine casing through the snap-in grooves on the two longitudinal plates. The support assembly and the turbine casing are firmly installed and easy to disassemble, thereby improving the loading and unloading speed between the guide vane tensioning tool and the turbine casing.

[0029] The positive and progressive effects of the present invention are:

[0030] The guide vane fixing device of the present invention has a hook assembly connected to a support assembly through a hanging rod and a pivot shaft assembly, and the end of the guide vane is fixed by the hook assembly. During the process of installing the guide vane to the turbine casing, the hook assembly fixes the guide vane at one end away from the turbine casing, so that the two ends of the guide vane remain horizontal, avoiding the situation where the guide vane is stuck due to different heights at the two ends of the guide vane, thereby improving the guide vane installation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 Schematic diagram of the turbine stator structure.

[0032] Figure 2 It is a schematic diagram of fixing the stator guide vanes in the prior art.

[0033] Figure 3 This is a schematic diagram of the installation of the guide vane fixing device.

[0034] Figure 4 This is a schematic diagram of the structure of the guide vane fixing device installed on the turbine casing.

[0035] Figure 5 It is a structural schematic diagram of the guide vane fixing device.

[0036] Figure 6 It is a schematic diagram of the parts structure of the guide vane fixing device.

[0037] Description of reference numerals:

[0038] In the prior art:

[0039] Turbine case 1'

[0040] Pad 2'

[0041] Guide vane 3'

[0042] Retaining ring 4'

[0043] Post-stage outer ring 5'

[0044] In the present invention:

[0045] Guide vane fixing device 100

[0046] Support component 1

[0047] Vertical board 11

[0048] Card slot 111

[0049] Horizontal board 12

[0050] Pivot shaft assembly 2

[0051] Locking piece 21

[0052] Pivot shaft body 22

[0053] Hanging rod 3

[0054] Pivot ring 31

[0055] Hook component 4

[0056] Connector 41

[0057] Hook 42

[0058] Clamping portion 421

[0059] Connection part 422

[0060] Turbine case 200

[0061] Guide vane 300 DETAILED DESCRIPTION

[0062] The present invention is further described below by way of examples, but the present invention is not limited to the scope of the examples.

[0063] like Figure 5 As shown, the present invention provides a guide vane fixing device 100 for fixing a guide vane 300 of an aircraft engine to a turbine casing 200 . The guide vane fixing device 100 includes a support assembly 1 , a pivot shaft assembly 2 , a plurality of hanging rods 3 and a plurality of hook assemblies 4 .

[0064] The support assembly 1 is used to be connected to the turbine casing 200 , and the hook assembly 4 is integrally fixedly connected to the turbine casing 200 via the hanging rod 3 and the pivot shaft assembly 2 .

[0065] The pivot shaft assembly 2 is connected to the support assembly 1 , and the pivot shaft assembly 2 is fixedly connected to the turbine casing 200 through the support assembly 1 . The pivot shaft assembly 2 is cylindrical as a whole, and the axis of the pivot shaft assembly 2 is coaxially arranged with the axis of the turbine casing 200 .

[0066] One end of the hanging rod 3 is pivoted to the pivot shaft assembly 2, and the hanging rod 3 can rotate around the circumference of the pivot shaft assembly 2. The main body of the hanging rod 3 is a straight rod, and the other end of the hanging rod 3 extends in the radial direction of the pivot shaft assembly 2. The axis of the pivot shaft assembly 2 and the turbine casing 200 are coaxially arranged, so that the other end of the hanging rod 3 extends in the radial direction of the turbine casing 200.

[0067] The hook assembly 4 is connected to the hanging rod 3. The hook assembly 4 is movably connected to the hanging rod 3. The hook assembly 4 hangs down from the hanging rod 3 along the direction of gravity. The hook assembly 4 is used to fix the guide vane 300 from the end of the guide vane 300, and the hook assembly 4 can tighten the guide vane 300 away from one end of the turbine casing 200. The turbine casing 200 is a cylindrical structure as a whole, and multiple stages of stators are installed along the axial direction of the turbine casing 200, and each stage of stators includes a guide vane 300 along the circumferential direction of the turbine casing 200. One end of the guide vane 300 is fixedly installed on the wall of the turbine casing 200, and the other end of the guide vane 300 extends along the radial direction of the turbine casing 200 toward the axial direction of the turbine casing 200. The hook assembly 4 hooks the end of the guide vane 300 close to the axial direction of the turbine casing 200.

[0068] like Figure 4 As shown, the axis of the pivot shaft assembly 2 is parallel to or coincides with the axis of the turbine casing 200. In this embodiment, the pivot shaft assembly 2 is arranged at the axis of the turbine casing 200, that is, the axis of the pivot shaft assembly 2 coincides with the axis of the turbine casing 200. With such arrangement, when the hanging rod 3 rotates around the pivot shaft assembly 2, one end of the hanging rod 3 is always located at the central axis of the turbine casing 200, and the hanging rod 3 body extends along the radial direction of the turbine casing 200. When the hook assembly 4 is hung on the hanging rod 3, since the guide vanes 300 of the same level have the same size, different hook assemblies 4 are hung at the same position of different hanging rods 3 to tighten the guide vanes 300 upward in the vertical direction, without adjusting the position of the hook assembly 4 hung on the hanging rod 3 one by one, thereby improving the installation efficiency of the guide vanes 300. In other embodiments, the pivot shaft assembly 2 may also be arranged parallel to the axial direction of the turbine casing 200, so that when the hanging rod 3 is pivoted to the pivot shaft assembly 2, when the hook assembly 4 hangs downward from the hanging rod 3 along the direction of gravity, the hook assembly 4 and the hanging rod 3 are perpendicular to each other, and the force applied to the hanging rod 3 by the hook assembly 4 due to the tightening of the guide vane 300 is downward in the vertical direction, thereby preventing the hanging rod 3 from bearing the component force from the hook assembly 4 in the non-vertical direction, thereby preventing the pivot shaft assembly 2 or the support assembly 1 from being displaced due to the component force in the non-vertical direction, and improving the stability of the guide vane fixing device 100 during use.

[0069] like Figure 6As shown, the pivot shaft assembly 2 is detachably connected to the support assembly 1. When the guide vane fixing device 100 is used to fix turbine casings 200 or guide vanes 300 of different sizes, pivot shaft assemblies 2 of different sizes and a hanging rod 3 pivoted on the pivot shaft can be selected according to actual conditions to improve the versatility of the guide vane fixing device 100.

[0070] The pivot shaft assembly 2 includes a locking member 21 and a pivot shaft body 22. The pivot shaft body 22 is inserted through the hanging rod 3 and the support assembly 1. A positioning plate is provided at the bottom of the pivot shaft body 22, and the diameter of the positioning plate is larger than the diameter of the pivot shaft body 22. The pivot shaft body 22 is inserted through the hanging rod 3 and the support assembly 1 from bottom to top, and the positioning plate can be pressed against the hanging rod 3 from bottom to top. A threaded portion is provided at the top of the pivot shaft body 22. A pivot ring 31 with a diameter matching that of one end of each hanging rod 3 and the pivot shaft body 22. During installation, the pivot shaft body 22 passes through each hanging rod 3 and the support assembly 1 from bottom to top, and the locking member 21 is locked and connected to the pivot shaft body 22 at the upper part of the support assembly 1. When the locking member 21 does not lock the pivot shaft body 22 and the support assembly 1, the hanging rod 3 can rotate around the circumference of the pivot shaft body 22 to adjust the circumferential position of the hanging rod 3. After the middle section of the hanging rod 3 and the guide vane 300 are aligned, the pivot shaft body 22 and the support assembly 1 are locked to achieve the circumferential positioning of the hanging rod 3 around the pivot shaft body 22. In this embodiment, the thread on the top of the pivot shaft body 22 is an external thread, the locking member 21 is a nut, and the locking member 21 locks the pivot shaft body 22 and the support assembly 1 by tightening the thread on the top of the pivot shaft body 22. In other embodiments, the thread on the top of the pivot shaft body 22 can be an internal thread, the locking member 21 can be a bolt, and the locking member 21 is tightened by the internal thread on the top of the pivot shaft body 22.

[0071] The hanging rod 3 is arranged below the supporting assembly 1. A plurality of hanging rod 3 assemblies are respectively pivoted on the pivot shaft assembly 2, and the hanging rods 3 are all arranged below the supporting assembly 1 to avoid interference between the hook assembly 4 hanging downward from the hanging rod 3 in the vertical direction and the supporting assembly 1.

[0072] like Figure 6 As shown, a pivot ring 31 is provided at one end of the hanging rod 3. The hanging rod 3 is a straight rod, and the pivot ring 31 is a hollow circular ring. The inner diameter of the pivot ring 31 matches the diameter of the pivot shaft body 22. The pivot ring 31 is pivoted to the pivot shaft assembly 2. When the locking member 21 is not locked to the pivot shaft body 22 and the support assembly 1, the pivot ring 31 can rotate around the circumference of the pivot shaft body 22. The body of the hanging rod 3 is fixedly connected to the pivot ring 31, and the body of the hanging rod 3 extends along the radial direction of the pivot ring 31. The axial direction of the pivot shaft body 22 is coaxially arranged with the axis of the turbine casing 200, and the rotation of the pivot ring 31 around the pivot shaft body 22 drives the body of the hanging rod 3 to rotate around the axis of the turbine casing 200. When the hanging rod 3 rotates around the pivot shaft body 22 through the pivot ring 31, the hanging rod 3 always points to the diameter direction of the turbine casing 200.

[0073] The hook assembly 4 is movably connected to the hanging rod 3, and the hook assembly 4 can move along the axial direction of the hanging rod 3. The hook assembly 4 is arranged on the hanging rod 3 by a rope. The relative positions of the hook assembly 4 and the hanging rod 3 are adjusted according to the size of the guide vane 300 to be fixed. When the guide vane 300 to be fixed is longer, the hook assembly 4 is adjusted along the axial direction of the hanging rod 3 to a position closer to the pivot shaft assembly 2; when the guide vane 300 to be fixed is shorter, the hook assembly 4 is adjusted along the axial direction of the hanging rod 3 to a position farther away from the pivot shaft assembly 2. Such adjustment ensures that regardless of the size of the guide vane 300 to be fixed, the tensioning force applied to the guide vane 300 by the hook assembly 4 is vertically upward, avoiding the generation of other non-vertical force components, which causes the guide vane 300 to be subjected to the force component in the non-gravity direction of the hook 42, resulting in unstable connection between the guide vane 300 and the turbine casing 200, causing the guide vane 300 to deflect, etc., and requiring readjustment to reduce installation efficiency.

[0074] like Figure 6 As shown, the hook assembly 4 includes a connector 41 and a hook 42, and the hook 42 is connected to one end of the extension rod away from the fixed assembly through the connector 41. The top of the hook 42 is fixedly connected to the connector 41. One end of the connector 41 is connected to the hook 42, and the other end of the connector 41 is wound and connected to the extension rod. In this embodiment, the connector 41 is a soft rope. In other embodiments, the connector 41 can also be a rope made of other flexible materials such as a wire rope or a cotton rope.

[0075] The hook 42 includes a clamping portion 421 and a connecting portion 422. The clamping portions 421 are fixedly provided on both sides of the connecting portion 422. When the hook 42 is fixedly connected to the inner side of the guide vane 300, the two clamping portions 421 are respectively fixedly connected to the upper and lower parts of the inner side of the guide vane 300. The cross section of the hook 42 is in a side "U" shape, and the distance between the two clamping portions 421 matches the width of the end of the guide vane 300, so that the two clamping portions 421 can be clamped to the end of the guide vane 300.

[0076] The support assembly 1 includes a transverse plate 12 and two longitudinal plates 11. The two longitudinal plates 11 are fixedly connected to the two ends of the transverse plate 12. The two longitudinal plates 11 extend vertically downward from the two ends of the transverse plate 12 respectively. The support assembly 1 is in an inverted "U" shape. A snap-in groove 111 is provided at one end of the longitudinal plate 11 away from the transverse plate 12. The snap-in groove 111 matches the upper edge of the turbine casing 200. The distance between the two snap-in grooves 111 is the same as the diameter of the turbine casing 200. The support assembly 1 is positioned and installed with the edge of the top of the turbine casing 200 through the snap-in groove 111, ensuring that the support assembly 1 can be quickly placed on the edge of the top of the turbine casing 200, and the snap-in groove 111 ensures that the fixed assembly located at the center of the support assembly 1 is located at the central axis of the turbine casing 200. A center hole is provided at the center point of the transverse plate 12 of the support assembly 1, and the pivot shaft assembly 2 is passed through the center hole.

[0077] like Figure 3 As shown, the guide vane 300 is fixed on the turbine casing 200 according to the following steps:

[0078] S1, serially assemble multiple hanging rods 3 onto the pivot shaft assembly 2;

[0079] S2, installing the pivot shaft body 22 into the center hole of the support assembly 1, and fixing the pivot shaft body 22 and the support assembly 1 by the locking member 21;

[0080] S3, placing the support assembly 1 on the rear mounting edge of the turbine casing 200;

[0081] S4, such as Figure 2 As shown, the guide vane 300 is installed on the turbine casing 200, and the front clamping groove of the guide vane 300 clamps the front stage outer wall and the casing mounting groove;

[0082] S5. According to the installation position of the guide vane 300, the hanging rod 3 is rotated to the middle cross-section position of the guide vane 300;

[0083] S6. After hooking the hook 42 with the connecting piece 41 onto the inner side of the guide vane 300, the connecting piece 41 is wound around the hanging rod 3 to achieve the inner side hanging fixation of the guide vane 300;

[0084] S7, repeat S4-S6 to complete the installation of all guide vanes 300 of this stage;

[0085] S8, repeat S1-S7 until all guide vanes 300 of this stage are installed;

[0086] Although the specific embodiments of the present invention are described above, it should be understood by those skilled in the art that this is only for illustration and the protection scope of the present invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, but these changes and modifications all fall within the protection scope of the present invention.

Claims

1. A guide vane fixing device for fixing the guide vane of an aircraft engine to a turbine casing, characterized in that: The guide vane fixing device comprises: a support assembly for connecting to an upper edge of the turbine casing; a pivot shaft assembly connected to the support assembly; A plurality of hanging rods, one end of each hanging rod is pivotally mounted on the pivot shaft assembly, and the other end of each hanging rod extends radially along the pivot shaft assembly; A plurality of hook assemblies, wherein the hook assemblies are connected to the hanging rod, and the hook assemblies are used to fix the guide vane from the end of the guide vane away from the turbine casing; Wherein, the axis of the pivot shaft assembly is parallel to or coincides with the axis of the turbine casing.

2. The guide vane fixing device according to claim 1, characterized in that: The pivot shaft assembly is detachably connected to the support assembly.

3. The guide vane fixing device according to claim 2, characterized in that: The pivot shaft assembly comprises a locking member and a pivot shaft body. The pivot shaft body is penetrated through the hanging rod and the supporting assembly. The locking member is lockingly connected to the pivot shaft body.

4. The guide vane fixing device according to claim 1, characterized in that: The hanging rod is arranged below the supporting assembly.

5. The guide vane fixing device according to claim 1, characterized in that: A pivot ring is provided at one end of the hanging rod, and the pivot ring is pivotally arranged on the pivot shaft assembly.

6. The guide vane fixing device according to claim 1, characterized in that: The hook assembly is movably connected to the hanging rod, and the hook assembly can move along the axial direction of the hanging rod.

7. The guide vane fixing device according to claim 1, characterized in that: The hook assembly comprises a connecting member and a hook, wherein the hook is connected to an end of the hanging rod away from the pivot shaft assembly through the connecting member.

8. The guide vane fixing device according to claim 7, characterized in that: The hook comprises a clamping portion and a connecting portion, the two sides of the connecting portion are respectively fixed with clamping portions, the cross section of the hook is in a side "U" shape, and the distance between the two clamping portions matches the width of the guide vane end.

9. The guide vane fixing device according to claim 1, characterized in that: The support assembly includes a transverse plate and two longitudinal plates, the two longitudinal plates are fixedly connected to the two ends of the transverse plate, the support assembly is in an inverted "U" shape, and a snap-in groove is provided at one end of the longitudinal plate away from the transverse plate, and the snap-in groove matches the upper edge of the turbine casing.

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