Lifting appliance for lifting gas turbine blade

Abstract

The utility model relates to a lifting appliance for lifting a gas turbine blade, and the lifting appliance comprises a clamping assembly which is provided with a first clamping part and a second clamping part, the first clamping part comprises a first vertical wall and a first horizontal wall, and the second clamping part comprises a second vertical wall and a second horizontal wall; a clamping space is defined by the first vertical wall, the first horizontal wall, the second vertical wall and the second horizontal wall, and the blade top is contained in the clamping space during hoisting; the hinge arm assembly is provided with a first arm and a second arm which are hinged together, the lower end of the first arm is connected with the first clamping part, and the lower end of the second arm is connected with the second clamping part; the two ends of the connecting assembly are connected with the upper end of the first arm and the upper end of the second arm respectively, the middle of the connecting assembly is used for being connected to a connecting part of the crane, and the connecting assembly enables the upper end of the first arm and the upper end of the second arm to be close during hoisting so as to enable the lower end of the first arm and the lower end of the second arm to be close. The lifting appliance can be used for replacing manual carrying, and the blade can be easily lifted.

Description

Technical Field

[0001] This utility model relates to the field of mechanical hoisting, specifically to a hoisting device for lifting gas turbine blades. Background Technology

[0002] During the manufacturing and maintenance of gas turbine blades, especially during fine processes such as surface coating, the blades need to be moved from the transport box to the workbench and then back to the transport box. This process is particularly arduous for V4 blades, as their net weight reaches 31 kg, far exceeding the national standard's limit of 15 kg for manual handling. Prolonged manual handling not only places a severe strain on the operator's body and increases the risk of occupational injury, but also poses a potential danger of blades slipping and falling during transport, causing damage or rendering the blades unusable, and possibly injuring the operator.

[0003] The unique shape and center of gravity of the blades make safe and precise handling exceptionally difficult without specialized tools. Furthermore, frequent manual handling reduces production efficiency, increases labor costs, and hinders the trend towards industrial automation and safety. Utility Model Content

[0004] The present invention aims to provide a lifting device for lifting gas turbine blades, replacing manual handling, and vertically lifting gas turbine blades, especially V4 blades.

[0005] According to one aspect of the embodiments of this application, a lifting device for lifting a gas turbine blade is provided. The gas turbine blade includes a blade body and blade root and blade tip located at opposite ends of the blade body. The gas turbine blade defines a spanwise direction, a tangential direction, and an axial direction perpendicular to the tangential direction and the spanwise direction. The lifting device includes: a clamping assembly having a first clamping member and a second clamping member that are movable relative to each other. The first clamping member includes a first vertical wall and a first horizontal wall connected to the first vertical wall. The second clamping member includes a second vertical wall and a second horizontal wall connected to the second vertical wall. A clamping space is formed by the first vertical wall, the first horizontal wall, the second vertical wall, and the second horizontal wall. During lifting, the blade tip is accommodated in the clamping space, and the first vertical wall and the second vertical wall clamp... The first horizontal wall and the second horizontal wall support the lower surface of the blade tip facing the blade body, which has two opposite sides of the blade tip; a hinged arm assembly having a first arm and a second arm hinged together in a cross configuration, the first arm having an upper end and a lower end opposite to each other, the second arm having an upper end and a lower end opposite to each other, the lower end of the first arm being connected to the first clamping member, and the lower end of the second arm being connected to the second clamping member; and a connecting assembly having its two ends connected to the upper ends of the first arm and the upper ends of the second arm respectively, the middle portion of the connecting assembly being used to connect to the connecting portion of a crane to lift the gas turbine blade, the connecting assembly being configured to bring the upper ends of the first arm and the upper ends of the second arm closer together during lifting, so that the lower ends of the first arm and the lower ends of the second arm are brought closer together.

[0006] In this way, the lifting device of this utility model adopts a mechanical, non-powered design, which can easily lift blade products, replace manual handling, and eliminate the risk of injury to the human body and scrapping of blade products during handling.

[0007] In one exemplary embodiment, the connecting assembly is a double-chain lifting ring assembly having a lifting ring and a first chain and a second chain connected to the lifting ring. The lifting ring is used to connect to the connecting part of the crane. The first chain is hinged to the upper end of the first arm, and the second chain is hinged to the upper end of the second arm.

[0008] By employing a double-chain lifting ring assembly in this manner, the connection between the lifting device and the crane is strengthened, improving the accuracy and safety of operation and significantly reducing the swaying of the blades during handling.

[0009] In one exemplary embodiment, the side of the first horizontal wall of the first clamping member facing the second clamping member is a concave arcuate side, which is complementary in shape to the convex surface of the blade near the top of the blade; and the side of the second horizontal wall of the second clamping member facing the first clamping member is a convex arcuate side, which is complementary in shape to the concave surface of the blade near the top of the blade.

[0010] In this way, through the design of the concave arc-shaped side of the first clamping component and the convex arc-shaped side of the second clamping component, the present invention can accurately match the shape of the blade, realize the stable support of the blade at the blade tip, effectively avoid damage to the blade caused by shape mismatch, and improve the efficiency and safety of blade handling.

[0011] In one exemplary embodiment, the leaf tip includes a flat first side and a flat second side extending in the chordal direction, wherein the first side is on the same side as the convex surface of the leaf body, the second side is on the same side as the concave surface of the leaf body, the first vertical wall of the first clamping member is used to abut against the first side, and the second vertical wall of the second clamping member is used to abut against the second side.

[0012] In this manner, the first clamping component and the second clamping component abut against the flat first side and the flat second side of the blade tip, respectively. This design ensures that the clamping force is evenly distributed, preventing the blade from deflecting or swaying during hoisting and further improving the stability of the hoisting.

[0013] In one exemplary embodiment, the first arm and the second arm are connected by a hinge axis. The first arm includes an upper first arm section above the hinge axis and a lower first arm section below the hinge axis. The second arm includes an upper second arm section above the hinge axis and a lower second arm section below the hinge axis. The length of the lower first arm section is greater than the length of the lower second arm section, such that the horizontal distance from the first vertical wall to the hinge axis is greater than the horizontal distance from the second vertical wall to the hinge axis.

[0014] This method optimizes the contact point between the blade and the lifting device, improves the balance and stability of the blade during lifting, prevents accidental tilting of the blade during the lifting process, and ensures safe and efficient lifting.

[0015] In one exemplary embodiment, the lower end of the first arm is located below the lower segment of the first arm and bent relative to the lower segment of the first arm to form a vertical segment; and the lower end of the second arm is located below the lower segment of the second arm and bent relative to the lower segment of the second arm, the lower end of the second arm including a vertical segment and a horizontal segment at an angle to the vertical segment.

[0016] This method improves the efficiency of force transmission, making the blades more stable during hoisting.

[0017] In one exemplary embodiment, the first horizontal wall of the first clamping member includes a horizontal flange extending outward from the first vertical wall in a direction away from the second clamping member, the end face of the lower end of the first arm is fixed to the horizontal flange, and the side of the lower end of the first arm is fixed to the side of the first vertical wall; and the second vertical wall of the second clamping member has a mounting groove on the side away from the first clamping member, and the vertical section of the lower end of the second arm is fixedly mounted into the mounting groove.

[0018] In this way, the first horizontal wall of the first clamping component is provided with a horizontal flange, and the second clamping component is provided with a mounting slot. This reinforced connection method not only improves the structural stability of the clamping components, but also enhances the durability and maintainability of the lifting device, and reduces the cost of long-term use.

[0019] In one exemplary embodiment, a first handle is installed on the lower end of the first arm for the operator to hold when positioning the lifting device before lifting, and a second handle is installed on the lower end of the second arm for the operator to hold when positioning the lifting device before lifting.

[0020] This method provides operators with the convenience of positioning the lifting equipment before lifting, simplifies the operation process, reduces the difficulty and safety risks of operation, makes the lifting process smoother and more controllable, and improves the safety and operational efficiency of the work site.

[0021] In one exemplary embodiment, the length of the first vertical wall in the chordal direction is greater than the length of the second vertical wall in the chordal direction; the height of the first vertical wall in the spanwise direction is less than the height of the second vertical wall in the spanwise direction; and the thickness of the first vertical wall in the axial direction is less than the thickness of the second vertical wall in the axial direction.

[0022] In this way, the dimensions of the first and second vertical walls are precisely designed to optimize the weight distribution and structural strength of the lifting gear, ensuring precise clamping and stable balance of the blades during lifting.

[0023] In one exemplary embodiment, the main plane of the first horizontal wall of the first clamping member includes a first portion and a second portion, the area of ​​the first portion being larger than the area of ​​the second portion; the main plane of the first vertical wall of the first clamping member is rectangular, and the first vertical wall includes a thickened vertical flange at a position close to the second portion; the main plane of the second horizontal wall of the second clamping member is arc-shaped; and the main plane of the second vertical wall of the second clamping member is square.

[0024] In this way, the structural strength and rigidity of the clamping components are enhanced, the support capacity and clamping stability of the blades are improved, and the shaking during blade handling is reduced.

[0025] In one exemplary embodiment, at least a portion of the surfaces of the first vertical wall, the first horizontal wall, the second vertical wall, and the second horizontal wall that are in contact with the gas turbine blades are provided with pads.

[0026] In this way, the blades are effectively protected from surface damage caused by clamping forces, and scratches or wear caused by hard materials are avoided.

[0027] In summary, the lifting device used for hoisting gas turbine blades can achieve at least the following beneficial technical effects.

[0028] First, through mechanical, non-powered design and precise calculation of the blade's center of gravity, this utility model lifting device can safely and stably lift the blade, avoiding the risk of physical injury and product damage caused by exceeding weight limits during manual handling.

[0029] Secondly, through the design of the complementary concave and convex clamping components, this utility model can effectively protect the blade from damage by clamping force and maintain the integrity and precision of the blade. Attached Figure Description

[0030] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0031] Figure 1 It is a schematic three-dimensional diagram of the horizontally placed gas turbine blades.

[0032] Figure 2 It is a schematic three-dimensional diagram of the vertical transport state of a gas turbine blade.

[0033] Figure 3 This is a schematic front view of a lifting device for lifting gas turbine blades according to an embodiment of this application.

[0034] Figure 4 This is a schematic side view of a lifting device for lifting gas turbine blades according to an embodiment of this application.

[0035] Figure 5 This is a schematic perspective view of a lifting device for lifting gas turbine blades according to one embodiment of this application.

[0036] Figure 6 This is another schematic perspective view of a lifting device for lifting gas turbine blades according to one embodiment of this application.

[0037] Figure 7 This is a schematic top view of a lifting device for lifting gas turbine blades according to an embodiment of this application.

[0038] Figure 8 This is a schematic perspective view of a lifting device for lifting gas turbine blades according to an embodiment of this application, showing the blade being lifted.

[0039] Figure 9 This is another schematic perspective view of a lifting device for lifting gas turbine blades according to an embodiment of this application, when the blades are being lifted.

[0040] The reference numerals in the attached figures are as follows:

[0041] 10. Leaf body

[0042] 11. Leaf base

[0043] 111. High-end

[0044] 112. Low-end

[0045] 12. Leaf tip

[0046] 121. First side view

[0047] 122. Second side view

[0048] 123. Tooth-shaped structure

[0049] 124. First tooth

[0050] 125. Second tooth

[0051] 13. First Edge

[0052] 14. Second Edge

[0053] 20. Clamping assembly

[0054] 21. First clamping component

[0055] 211. First vertical wall

[0056] 212. First horizontal wall

[0057] 213. Concave arc-shaped side

[0058] 214. Horizontal flange

[0059] 215. Part One

[0060] 216. Part Two

[0061] 217. Vertical flange

[0062] 22. Second clamping component

[0063] 221. Second vertical wall

[0064] 222. Second horizontal wall

[0065] 223. Protruding curved side

[0066] 224. Install the card slot

[0067] 30. Articulated arm assembly

[0068] 31. First Arm

[0069] 311. Upper end of the first arm

[0070] 312. Lower end of the first arm

[0071] 313. The top leader

[0072] 316. Upper part of the first arm

[0073] 317. Lower section of the first arm

[0074] 32. Second arm

[0075] 321. Upper end of the second arm

[0076] 322. Lower end of the second arm

[0077] 323. Vertical Section

[0078] 324. Horizontal section

[0079] 325. Second-in-command

[0080] 326. Upper part of the second arm

[0081] 327. Lower section of the second arm

[0082] 33. Hinge shaft

[0083] 40. Connecting components

[0084] 41. The first chain

[0085] 42. Second chain

[0086] 43. Hanging rings

[0087] 44. Detection device

[0088] 50. Padding

[0089] S, Expansion Direction

[0090] C. Chord direction

[0091] A. Axial direction Detailed Implementation

[0092] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, and not all of them. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this application. The nouns and pronouns referring to persons in this patent application are not limited to specific genders.

[0093] Reference Figure 1 and Figure 2 Schematic perspective views of a gas turbine blade in a horizontally placed state and a vertically transported state are shown, respectively. The gas turbine blade, specifically the V4 blade, has a net weight of 31 kg. The gas turbine blade includes a blade body 10 and blade roots 11 and blade tips 12 located at opposite ends of the blade body 10. The gas turbine blade defines a spanwise direction S, a tangential direction C, and an axial direction A perpendicular to the tangential direction C and the spanwise direction S. These three directions are... Figure 2 The symbols are marked illustratively. It should be noted that the directional terms mentioned in this application, such as up, down, high, low, etc., refer to the direction of the gas turbine blade when it is vertically suspended, that is, the direction when the spanwise direction S is vertical.

[0094] Those skilled in the art will understand that a spanwise direction S is defined between the blade root 11 and the blade tip 12. The blade body 10 includes a first edge 13 and a second edge 14 opposite to the first edge 13, and a tangential direction C is defined between the first edge 13 and the second edge 14. Both the blade root 11 and the blade tip 12 have assembly structures extending from the blade body 10 in the axial direction A, the tangential direction C, and the spanwise direction S, which may be referred to as claw-shaped structures or toothed structures. Figure 2 The first tooth 124 and the second tooth 125 adjacent to the leaf body 10 are marked. Obviously, the overall size and weight of the leaf tip 12 are smaller than the overall size and weight of the leaf root 11, and the leaf tip 12 can also be referred to as the small end.

[0095] This utility model provides a lifting device to replace manual handling, vertically lifting the V4 blade, as shown in the figure. Figure 2 The blade tip 12 faces upwards, meaning the smaller end faces upwards. The contact part between the lifting device and the V4 blade is designed using a contour-following method. When the lifting device is lifted by a crane, the blade's own weight allows the device to clamp the blade. This utility model's lifting device adopts a mechanical, non-powered design. The lifting device is designed using software simulation and calculation of the blade's center of gravity. The lifting device has a load capacity of 38KG, ensuring ease of clamping.

[0096] Figures 3 to 7 Different views of the fixture are shown. (Refer to...) Figure 3 The fixture mainly includes a clamping assembly 20, a hinged arm assembly 30, and a connecting assembly 40.

[0097] Reference Figure 3 , Figure 5 and Figure 8 As can be seen, the clamping assembly has a first clamping component 21 and a second clamping component 22 that can move relative to each other. The first clamping component 21 includes a first vertical wall 211 and a first horizontal wall 212 connected to the first vertical wall 211. The second clamping component 22 includes a second vertical wall 221 and a second horizontal wall 222 connected to the second vertical wall 221. The clamping space is formed by the first vertical wall 211, the first horizontal wall 212, the second vertical wall 221 and the second horizontal wall 222. During lifting, the blade tip 12 is accommodated in the clamping space, and the first vertical wall 211 and the second vertical wall 221 clamp the two opposite sides of the blade tip 12. The first horizontal wall 212 and the second horizontal wall 222 support the lower surface of the blade tip 12 facing the blade body 10. The articulated arm assembly 30 has a first arm 31 and a second arm 32 hinged together in a cross configuration. The first arm 31 includes an upper end 311 and a lower end 312 opposite to each other. The second arm 32 includes an upper end 321 and a lower end 322 opposite to each other. The lower end 312 is connected to a first clamping member 21, and the lower end 322 is connected to a second clamping member 22. The two ends of the connecting assembly 40 are respectively connected to the upper ends 311 and 321 of the first arm. The middle part of the connecting assembly is used to connect to the connecting part of the crane to lift the gas turbine blades. The connecting assembly is configured such that the upper ends 311 and 321 of the first arm are brought close to each other during lifting.

[0098] exist Figure 3In this example, the connecting assembly 40 is a double-chain lifting ring assembly, having a lifting ring 43 and a first chain 41 and a second chain 42 connected to the lifting ring 43. The lifting ring 43 is used to connect to the connecting part of the crane. The first chain 41 is hinged to the upper end 311 of the first boom, and the second chain 42 is hinged to the upper end 321 of the second boom. It is understood that the connecting assembly 40 can also be other types of assemblies; for example, the first chain 41 and the second chain 42 can be replaced by two ropes or two rods.

[0099] Reference Figure 8 and Figure 9 It can be seen that the side of the first horizontal wall 212 of the first clamping component 21 facing the second clamping component 22 is a concave arc-shaped side 213. Figure 7 (As shown), the concave arcuate side 213 is complementary in shape to the convex surface of the blade 10 near the blade tip 12; and the side of the second horizontal wall 222 of the second clamping member 22 facing the first clamping member 21 is the convex arcuate side 223. Figure 7 (As shown), the convex arcuate side 223 is complementary in shape to the concave surface of the blade 10 near the top 12 of the blade.

[0100] Reference Figure 2 and Figure 8 The top of the blade 12 includes a flat first side 121 and a flat second side 122 extending in the chord direction C, wherein the first side 121 is on the same side as the protruding surface of the blade body 10, and the second side 122 is on the same side as the recessed surface of the blade body 10. The first vertical wall 211 of the first clamping member 21 is used to abut against the first side 121, and the second vertical wall 221 of the second clamping member 22 is used to abut against the second side 122.

[0101] Reference Figure 3 The first arm 31 and the second arm 32 are connected by a hinge shaft 33. The first arm 31 includes an upper section 316 above the hinge shaft 33 and a lower section 317 below the hinge shaft 33. The second arm 32 includes an upper section 326 above the hinge shaft 33 and a lower section 327 below the hinge shaft 33. The length of the lower section 317 is greater than the length of the lower section 327, such that the horizontal distance from the first vertical wall 211 to the hinge shaft 33 is greater than the horizontal distance from the second vertical wall 221 to the hinge shaft 33. It should be understood that, for the stability of the lifting, the lifting device is designed by simulating the shape and calculating the center of gravity of the blade through software, so that the lifting ring 43, the hinge shaft 33, and the center of gravity of the blade are on the same vertical line when lifted.

[0102] Reference Figure 3The lower end 312 of the first arm is located below the lower section 317 of the first arm and is bent relative to the lower section 317 of the first arm to form a vertical section; and the lower end 322 of the second arm is located below the lower section 327 of the second arm and is bent relative to the lower section 327 of the second arm. The lower end 322 of the second arm includes a vertical section 323 and a horizontal section 324 at an angle to the vertical section 323. The horizontal section 324 is fixed together with the second horizontal wall 222.

[0103] Reference Figure 5 The first horizontal wall 212 of the first clamping member 21 includes a horizontal flange 214 extending outward from the first vertical wall 211 in a direction away from the second clamping member 22. The end face of the lower end 312 of the first arm is fixed to the horizontal flange 214, and the side of the lower end 312 of the first arm is fixed to the side of the first vertical wall 211. The second vertical wall 221 of the second clamping member 22 has a mounting groove 224 on the side away from the first clamping member 21, and the vertical section 323 of the lower end 322 of the second arm is fixedly installed into the mounting groove 224.

[0104] Reference Figure 5 A first handle 313 is installed on the lower end 312 of the first arm for the operator to hold when positioning the lifting device before lifting, and a second handle 325 is installed on the lower end 322 of the second arm for the operator to hold when positioning the lifting device before lifting.

[0105] Reference Figure 5 The length of the first vertical wall 211 in the chordal direction C is greater than the length of the second vertical wall 221 in the chordal direction C; the height of the first vertical wall 211 in the spanning direction S is less than the height of the second vertical wall 221 in the spanning direction S; and the thickness of the first vertical wall 211 in the axial direction A is less than the thickness of the second vertical wall 221 in the axial direction A.

[0106] Reference Figure 7 The main plane of the first horizontal wall 212 of the first clamping member 21 includes a first portion 215 and a second portion 216, wherein the area of ​​the first portion 215 is larger than the area of ​​the second portion 216. It is understood that this design is to match the shape of the blade. (Refer to...) Figure 5 The first vertical wall 211 of the first clamping member 21 has a rectangular main plane, and the first clamping member 21 includes a thickened vertical flange 217 at a position close to the second part; the main plane of the second horizontal wall 222 of the second clamping member 22 is arc-shaped; and the main plane of the second vertical wall 221 of the second clamping member 22 is square.

[0107] Reference Figure 5At least partially, pads 50 are provided on the surfaces of the first vertical wall 211, the first horizontal wall 212, the second vertical wall 221, and the second horizontal wall 222 that are in contact with the gas turbine blades. The connection assembly may also include a detection device 44 for detecting the tension of at least one of the first chain 41 and the second chain 42.

[0108] Reference Figure 8 In the lifted state of the gas turbine blade, the spanwise direction S is vertical, and the blade root 11 is inclined relative to the horizontal direction. The blade root 11 includes a lower end 112 and a higher end 111 in the chordwise direction C. The lifting device is designed by simulating the shape and calculating the center of gravity of the blade through software, so that the lifting ring 43, the hinge shaft 33 and the center of gravity of the blade are on the same vertical line, ensuring the stability of the lifting process.

[0109] The above description is only a preferred embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A lifting device for lifting gas turbine blades, the gas turbine blades comprising a blade body (10) and blade roots (11) and blade tips (12) located at opposite ends of the blade body (10), the gas turbine blades defining a spanwise direction (S), a tangential direction (C), and an axial direction (A) perpendicular to the tangential direction (C) and the spanwise direction (S), characterized in that, The lifting device includes: The clamping assembly (20) has a first clamping member (21) and a second clamping member (22) that are movable relative to each other. The first clamping member (21) includes a first vertical wall (211) and a first horizontal wall (212) connected to the first vertical wall (211). The second clamping member (22) includes a second vertical wall (221) and a second horizontal wall (222) connected to the second vertical wall (221). The clamping space is formed by the first vertical wall (211), the first horizontal wall (212), the second vertical wall (221), and the second horizontal wall (222). During lifting, the blade tip (12) is accommodated in the clamping space, and the first vertical wall (211) and the second vertical wall (221) clamp two opposite sides of the blade tip (12). The first horizontal wall (212) and the second horizontal wall (222) support the lower surface of the blade tip (12) facing the blade body (10). A hinged arm assembly (30) has a first arm (31) and a second arm (32) hinged together in a cross configuration. The first arm (31) includes an upper end (311) and a lower end (312) of the first arm, which are opposite to each other. The second arm (32) includes an upper end (321) and a lower end (322) of the second arm, which are opposite to each other. The lower end (312) of the first arm is connected to the first clamping member (21), and the lower end (322) of the second arm is connected to the second clamping member (22). A connecting assembly (40) is provided, with its two ends connected to the upper ends of the first arm (311) and the upper ends of the second arm (321) respectively, and its middle part connected to the connecting part of the crane to lift the gas turbine blades. The connecting assembly is configured to bring the upper ends of the first arm (311) and the upper ends of the second arm (321) closer to each other during lifting, so that the lower ends of the first arm (312) and the lower ends of the second arm (322) are close to each other.

2. The lifting device for lifting gas turbine blades according to claim 1, characterized in that, The connecting assembly is a double chain lifting ring assembly, having a lifting ring (43) and a first chain (41) and a second chain (42) connected to the lifting ring (43). The lifting ring (43) is used to connect to the connecting part of the crane. The first chain (41) is hinged to the upper end (311) of the first arm, and the second chain (42) is hinged to the upper end (321) of the second arm.

3. The lifting device for lifting gas turbine blades according to claim 1 or 2, characterized in that, The side of the first horizontal wall (212) of the first clamping member (21) facing the second clamping member (22) is a concave arc-shaped side (213), which is complementary in shape to the convex surface of the blade (10) near the blade tip (12); and The side of the second horizontal wall (222) of the second clamping member (22) facing the first clamping member (21) is a convex arcuate side (223), which is complementary in shape to the concave surface of the blade (10) near the blade tip (12).

4. The lifting device for lifting gas turbine blades according to claim 1 or 2, characterized in that, The leaf tip (12) includes a flat first side surface (121) and a flat second side surface (122) extending in the tangential direction (C), wherein the first side surface (121) is on the same side as the convex surface of the leaf body (10), and the second side surface (122) is on the same side as the concave surface of the leaf body (10). The first vertical wall (211) of the first clamping member (21) is used to abut against the first side (121), and the second vertical wall (221) of the second clamping member (22) is used to abut against the second side (122).

5. The lifting device for lifting gas turbine blades according to claim 1 or 2, characterized in that, The first arm (31) and the second arm (32) are connected by a hinge shaft (33). The first arm (31) includes an upper first arm section (316) above the hinge shaft (33) and a lower first arm section (317) below the hinge shaft (33). The second arm (32) includes an upper second arm section (326) above the hinge shaft (33) and a lower second arm section (327) below the hinge shaft (33). The length of the lower first arm section (317) is greater than the length of the lower second arm section (327), such that the horizontal distance from the first vertical wall (211) to the hinge shaft (33) is greater than the horizontal distance from the second vertical wall (221) to the hinge shaft (33).

6. The lifting device for lifting gas turbine blades according to claim 5, characterized in that, The lower end (312) of the first arm is located below the lower section (317) of the first arm and bends relative to the lower section (317) of the first arm to form a vertical section; and The lower end (322) of the second arm is located below the lower section (327) of the second arm and is bent relative to the lower section (327). The lower end (322) of the second arm includes a vertical section (323) and a horizontal section (324) at an angle to the vertical section (323).

7. The lifting device for lifting gas turbine blades according to claim 6, characterized in that, The first horizontal wall (212) of the first clamping member (21) includes a horizontal flange (214) extending outward from the first vertical wall (211) in a direction opposite to the second clamping member (22). The end face of the lower end (312) of the first arm is fixed to the horizontal flange (214), and the side of the lower end (312) of the first arm is fixed to the side of the first vertical wall (211). The second vertical wall (221) of the second clamping member (22) has a mounting slot (224) on the side opposite to the first clamping member (21), and the vertical section (323) of the lower end (322) of the second arm is fixedly mounted into the mounting slot (224).

8. The lifting device for lifting gas turbine blades according to claim 1 or 2, characterized in that, A first handle (313) is installed on the lower end (312) of the first arm for the operator to hold when positioning the lifting device before lifting. A second handle (325) is installed on the lower end (322) of the second arm for the operator to hold when positioning the lifting device before lifting.

9. The lifting device for lifting gas turbine blades according to claim 5, characterized in that, The length of the first vertical wall (211) in the chordal direction (C) is greater than the length of the second vertical wall (221) in the chordal direction (C); The height of the first vertical wall (211) in the spanning direction (S) is smaller than the height of the second vertical wall (221) in the spanning direction (S); and The thickness of the first vertical wall (211) in the axial direction (A) is smaller than the thickness of the second vertical wall (221) in the axial direction (A).

10. The lifting device for lifting gas turbine blades according to claim 1 or 2, characterized in that, The main plane of the first horizontal wall (212) of the first clamping member (21) includes a first part (215) and a second part (216), wherein the area of ​​the first part (215) is larger than the area of ​​the second part (216); The main plane of the first vertical wall (211) of the first clamping member (21) is rectangular, and the first vertical wall (211) includes a thickened vertical flange (217) at a position close to the second part (216); The main plane of the second horizontal wall (222) of the second clamping member (22) is arc-shaped; and The main plane of the second vertical wall (221) of the second clamping component (22) is square.

11. The lifting device for lifting gas turbine blades according to claim 1 or 2, characterized in that, At least a portion of the surfaces of the first vertical wall (211), the first horizontal wall (212), the second vertical wall (221), and the second horizontal wall (222) that are in contact with the gas turbine blades are provided with pads (50).

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