A large-size split composite propeller assembly tool and assembly method

Abstract

The present invention relates to a large-size split composite propeller assembly tool, comprising a main body platform, a bottom support disc, a blade positioning adjustment ring, a blade support adjustment block and a blade root support adjustment block; a reserved operation circular hole with an aperture not less than the outer diameter of a hub is arranged in the middle of the main body platform; the bottom support disc has a diameter not less than the aperture of the reserved operation circular hole and is installed below it; the outer ring diameter of the blade positioning adjustment ring is consistent with the outer diameter of the hub, is located in the reserved operation circular hole and is placed on the bottom support disc; the blade support adjustment block and the blade root support adjustment block are installed on the main body platform, respectively supporting the blade and the blade root of the blade; the blade support adjustment block and the upper surface are the blade contact surface, on which a height adjustment device is arranged; the upper surface of the blade root support adjustment block is the blade contact surface, and a top support device is arranged on the side. The present invention ensures the accuracy of assembly through the linkage adjustment of the blade support adjustment block, the blade root support adjustment block and the blade positioning adjustment ring.

Description

Technical Field

[0001] The present invention belongs to the technical field of composite propellers, and in particular relates to a large-size split composite propeller blade, a hub assembly tool and a specific assembly method. Background Art

[0002] At present, conventional metal propellers on the market are manufactured in one piece to ensure overall quality and performance. However, for large-sized propellers, it is very difficult to manufacture in one piece. Because metal blades are very heavy and have a large rotational mass inertia, if the metal hub and metal blades are manufactured separately and then assembled, there will be a great technical risk in the reliability of the connection after assembly.

[0003] With the rapid development of the propeller industry, metal propellers are difficult to meet the higher requirements of weight reduction, propulsion efficiency, vibration and noise reduction. Composite propellers will become an inevitable trend in the future development of the propeller industry due to their excellent performance such as significant weight reduction, high propulsion efficiency, and significant vibration and noise reduction. For large-sized composite propellers, they are also subject to the limitations of the advancement and maturity of large-sized complex structure composite material manufacturing technology. The split manufacturing and then assembly method will become the mainstream design idea.

[0004] Generally, large-sized split composite propellers have different assembly methods due to the different connection forms between the hub and the blades. Due to their large structural dimensions and weight, special tooling design that matches the assembly method is required to ensure the smooth completion of the entire assembly process while further fully ensuring the accuracy of the overall assembly. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide an assembly tool and an assembly method for a large-size split composite propeller in which the hub and the blade roots are connected by dovetail mortise and tenon assembly, so as to solve the assembly problems and assembly tooling problems of the hub and blades of the composite propeller with this structural form, while ensuring the smooth and efficient completion of the assembly process, also ensuring the overall accuracy of the composite propeller after assembly, as well as the reliability of the overall strength and other performances after assembly.

[0006] The technical solution adopted by the present invention to solve the above-mentioned technical problems is:

[0007] A large-size split composite propeller assembly tool, comprising a main platform, a bottom support disc, a blade positioning adjustment ring, a blade support adjustment block and a blade root support adjustment block;

[0008] A reserved circular hole for operation with a diameter not less than the outer diameter of the hub is arranged in the middle of the main body platform;

[0009] The diameter of the bottom support disc is not less than the diameter of the reserved operation circular hole, and the bottom support disc is arranged below the reserved operation circular hole and is fixedly mounted on the lower surface of the main platform in a detachable manner;

[0010] The outer ring diameter of the blade positioning adjustment ring is consistent with the outer diameter of the hub, is located in the reserved operation circular hole and is placed on the bottom support disc;

[0011] The number of the blade support adjustment block and the blade root support adjustment block is consistent with the number of blades of the split composite propeller, which is set to N. The N blade root support adjustment blocks are circumferentially distributed along the outer circle of the reserved operation circular hole and installed on the upper surface of the main body platform. The N blade support adjustment blocks are circumferentially distributed along the outer circle of the blade root support adjustment block and installed on the upper surface of the main body platform. The blade support adjustment blocks correspond to the blade root support adjustment blocks one by one, and are respectively used to support the blade and blade root of the same blade;

[0012] The upper surface of the blade support and adjustment block is a first blade contact surface, which follows the shape of the blade of the paddle; a height adjustment device is provided on the blade support and adjustment block, which is used to adjust the height of the blade support and adjustment block to ensure support for the paddle;

[0013] The upper surface of the blade root support and adjustment block is the second blade contact surface, which follows the shape of the blade of the blade; a radially movable supporting device is arranged on the side of the blade root support and adjustment block, and the inner side surface of the supporting device follows the shape of the blade root of the blade, and is used to apply radial force to the outer annular surface of the blade root to fine-tune the blade position and support the blade.

[0014] In the above solution, the height adjustment device is a height adjustment bolt installed on the blade support adjustment block and arranged in the vertical direction.

[0015] In the above scheme, the supporting device includes an annular adjustment top block and annular adjustment bolt which are coaxially arranged and connected. The annular adjustment top block is located on the inner side of the blade root support adjustment movable block, and the annular adjustment bolt is located on the outer side of the blade root support adjustment movable block.

[0016] In the above scheme, the inner annular surface of the blade root support and adjustment block is conformed to the outer annular surface of the blade root of the blade, and an annular gap of 0-40 mm is reserved between the two.

[0017] In the above solution, the installation position of the blade support adjustment block on the main platform is between 0.3R and 0.8R of the blade.

[0018] In the above scheme, a first limit slot is provided at the bottom of the blade contact surface of the blade support and adjustment block, and a second limit slot is provided at the bottom of the blade contact surface of the blade root support and adjustment block.

[0019] In the above solution, a detachable lifting ring is installed inside the blade positioning and adjusting ring.

[0020] The above scheme also includes a main body bracket, and the main body platform is fixedly installed on the upper end of the main body bracket; the load-bearing capacity of the main body bracket and the main body platform meets the assembly requirements, and the load-bearing weight is at least 1.5 times the mass of the propeller or more.

[0021] In the above solution, the axial length of the blade positioning adjustment ring is smaller than the axial length of the blade root.

[0022] Accordingly, the present invention further proposes a method for assembling a large-sized split composite propeller, wherein the blade of the large-sized split composite propeller comprises a blade and a blade root, and the inner annular surface of the blade root is assembled and connected with the outer annular surface of the hub. The assembly method is performed using the above-mentioned large-sized split composite propeller assembly tool, and comprises the following steps:

[0023] S1. Installation preparation of assembly tooling: including leveling of the main platform, installation of the bottom support disc, blade positioning adjustment block, and blade root support adjustment block;

[0024] S2. Installation and preliminary positioning of propeller blades one by one:

[0025] S2.1. Slowly hoist the first propeller blade to the main platform and place it on one set of blade root support adjustment blocks and blade positioning adjustment blocks, so that the blade root contacts the inner side of the blade root support adjustment block, and then adjust the height of the blade positioning adjustment block for support;

[0026] S2.2. Complete the preliminary assembly of all blades in sequence;

[0027] S3. Precise positioning of all propeller blades:

[0028] S3.1. Slowly hoist the blade positioning adjustment ring into the reserved circular hole for operation until it is on the bottom support disc;

[0029] S3.2. Adjust the supporting device of the blade root positioning block so that the inner side of the supporting device supports the corresponding blade root, and the inner side of the blade root supports the blade positioning adjustment ring; at the same time, adjust the height adjustment device of the blade support adjustment block in linkage to ensure the horizontality and relative position accuracy of the blade;

[0030] S4. Assemble the propeller hub: hoist the propeller hub above the blade, and slowly move it downward along the dovetail guide rail on the inner side of the blade root until it contacts the upper end of the blade positioning adjustment ring;

[0031] S5. First hold the blade positioning adjustment ring, and then remove the bottom support ring from under the main frame;

[0032] S6. Slowly lower the blade positioning adjustment ring and gently tap the upper end of the hub. Gradually assemble the hub until the gap between the upper end and the upper end of the blade root is 0 to 50 mm.

[0033] S7. Remove the blade positioning adjustment ring;

[0034] S8. Complete the fixing of the connecting bolts between the hub and the blades, and the assembly is complete.

[0035] The beneficial effects of the present invention are:

[0036] 1. The present invention is aimed at the assembly tooling and corresponding assembly method designed for a large-size split composite propeller with a specific structural form (the hub and the blade root are connected by dovetail mortise and tenon assembly). The assembly accuracy is ensured by the linkage adjustment of the blade support adjustment block, the blade root support adjustment block, and the blade positioning adjustment ring. Among them, the role of the blade root support adjustment block is to: initially support and fix the blades; and to fine-tune the position of the blades through the top support device arranged thereon, and to support them. The role of the blade support adjustment block is to: further support the blades and maintain balance; and to adjust the height of the block through the height adjustment device arranged thereon to ensure support for the blades. The role of the blade positioning adjustment ring is to: accurately locate the relative position of each blade; and to complete the final fixation of all blades together with the blade root support adjustment block.

[0037] 2. The assembly tool of the present invention has a simple structure and the materials are easily available, so that the production cost of the tool is low and the assembly operation is easy.

[0038] 3. The present invention solves the practical assembly operation difficulties of large split propellers, and the performance of the assembled propellers can meet the use requirements.

[0039] 4. The present invention is particularly suitable for the assembly of large split propellers with multiple blades (≥5 blades). BRIEF DESCRIPTION OF THE DRAWINGS

[0040] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which:

[0041] Figure 1 It is an overall structural diagram of the assembly tooling of a large-sized split composite propeller of the present invention;

[0042] Figure 2 yes Figure 1 The structural diagram of the main platform and main support of the assembly tool shown;

[0043] Figure 3 yes Figure 1 A structural diagram of the bottom support disc of the assembly tool shown;

[0044] Figure 4 yes Figure 3 The installation diagram of the bottom support disc shown;

[0045] Figure 5 yes Figure 1 The structural diagram of the blade positioning adjustment ring of the assembly tool shown;

[0046] Figure 6 yes Figure 1 The structural diagram of the blade support adjustment movable block of the assembly tool shown;

[0047] Figure 7 yes Figure 1 The structural diagram of the blade root support adjustment movable block of the assembly tool shown;

[0048] Figure 8 yes Figure 7 The structural diagram of the blade root support adjusting movable block at another angle shown;

[0049] Fig. 9 is a schematic diagram of step S2 in the assembly method of the present invention;

[0050] Fig.10 is a schematic diagram of step S3 in the assembly method of the present invention;

[0051] Fig.11 It is a schematic diagram of step S4 in the assembly method of the present invention.

[0052] In the figure: 10, main platform; 11, blade movable block mounting hole; 12, blade root movable block mounting hole; 13, operation reserved circular hole; 14, connection fixing screw hole;

[0053] 20. Bottom support disc; 21. Connection hole with the main platform; 22. Hollow processing hole;

[0054] 30. Blade positioning adjustment ring; 31. Lifting ring;

[0055] 40. Blade support adjustment block; 41. First blade contact surface; 42. Height adjustment bolt; 43. Fixing screw hole; 44. Fixing bolt; 45. First limit slot;

[0056] 50. Blade root support adjustment block; 51. Second blade contact surface; 52. Blade root contact surface; 53. Annular adjustment top block; 54. Annular adjustment bolt; 55. Screw hole for fixing the block; 56. Second limit slot;

[0057] 60. Main frame;

[0058] 210, blade; 211, blade; 212, blade root; 2121, dovetail boss; 220, hub; 221, dovetail groove. DETAILED DESCRIPTION

[0059] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, specific embodiments of the present invention are now described in detail with reference to the accompanying drawings.

[0060] like Figure 1 As shown, a large-sized split composite propeller assembly tool provided by an embodiment of the present invention includes a main platform 10, a main bracket 60, a bottom support disc 20, a blade positioning adjustment ring 30, a blade support adjustment block 40 and a blade root support adjustment block 50. The main platform 10 is an installation platform for the propeller. The main platform 10 is installed on the main bracket 60, and the bottom support disc 20, the blade positioning adjustment ring 30, the blade support adjustment block 40 and the blade root support adjustment block 50 are all installed on the main platform 10.

[0061] like Figure 2 As shown, a reserved circular hole 13 for operation with a hole diameter slightly larger than the outer diameter of the hub is set in the middle of the main platform 10; blade root movable block mounting holes 12 are evenly arranged along the circumference of the outer circle of the reserved circular hole 13, and blade movable block mounting holes 11 are evenly arranged along the circumference of the outer circle of the blade root movable block mounting hole 12. The flatness of the upper and lower surfaces of the main platform 10 is within the range of 2mm. The main bracket 60 is gridded all around, and a manhole is reserved on each of the four sides for convenient entry and exit operations. The bearing capacity of the main bracket 60 and the main platform 10 meets the assembly requirements, and the bearing weight is at least 1.5 times the mass of the propeller or more. The main platform 10 and the main bracket 60 are connected by connecting the fixing screw holes 14 and the corresponding bolts. The levelness of the main bracket 60 and the main platform 10 after fixing is within 5mm.

[0062] like Figure 3-4 As shown, the diameter of the bottom support disc 20 is slightly larger than the diameter of the reserved operation hole 13. The bottom support disc 20 is arranged below the reserved operation hole 13 and is fixedly mounted on the lower surface of the main platform 10 by connecting with the main platform connection hole 21 and corresponding bolts. The bottom support disc 20 is also provided with a hollow processing hole 22 to reduce the weight of the device.

[0063] like Figure 5 As shown, the outer ring diameter of the blade positioning adjustment ring 30 is consistent with the outer diameter of the hub, and the axial length of the blade positioning adjustment ring 30 is less than the axial length of the blade root. During the assembly process, the blade positioning adjustment ring 30 is located in the reserved operation circular hole 13 and is placed on the bottom support disc 20. A detachable lifting ring 31 is installed on the inner side of the inner ring of the blade positioning adjustment ring 30, and the number of the lifting rings is 2 to 4.

[0064] The number of blade support adjustment blocks 40 and blade root support adjustment blocks 50 is consistent with the number of blades of the split composite propeller, which is set to N (N=7 in this embodiment). N blade root support adjustment blocks 50 are installed on the upper surface of the main platform 10 through the blade root block mounting holes 12 and corresponding bolts. N blade support adjustment blocks 40 are installed on the upper surface of the main platform 10 through the blade block mounting holes 11 and corresponding bolts. The blade support adjustment blocks 40 and the blade root support adjustment blocks 50 correspond one to one, and are respectively used to support the blades and blade roots of the same blade.

[0065] like Figure 6 As shown, the upper surface of the blade support and adjustment block 40 is a first blade contact surface 41, which follows the shape of the blade of the propeller; a first limit slot 45 is provided at the bottom of the first blade contact surface 41. The installation position of the blade support and adjustment block 40 on the main platform 10 is between 0.3R and 0.8R of the blade, where R refers to the radius of the propeller. A height adjustment device is provided on the blade support and adjustment block 40, which is used to adjust the height of the blade support and adjustment block 40 to ensure support for the blade. Specifically, the height adjustment device is a height adjustment bolt installed on the blade support and adjustment block 40 and arranged in the vertical direction, and a corresponding bolt top hole is provided on the blade support and adjustment block 40. A fixing screw hole 43 corresponding to the blade block mounting hole 11 is provided on the blade support and adjustment block 40, and is connected to the main platform 10 through a fixing bolt 44.

[0066] like Figure 7-8 As shown, the upper surface of the blade root support and adjustment block 50 is a second blade contact surface 51, which conforms to the blade shape of the blade; a second limit slot 56 is provided at the bottom of the second blade contact surface 51 of the blade root support and adjustment block 50. The inner annular surface of the blade root support and adjustment block 50 is a blade root contact surface 52, which conforms to the outer annular surface of the blade root of the blade. A 0-40mm annular gap is reserved between the inner annular surface of the blade root support and adjustment block 50 and the blade root. A radially movable supporting device is provided on the side of the blade root support and adjustment block 50, and the inner side surface of the supporting device conforms to the blade root of the blade, and is used to apply radial force to the outer annular surface of the blade root to fine-tune the blade position and support the blade. Specifically, the supporting device includes a coaxially arranged and connected annular adjustment top block 53 and annular adjustment bolt 54, the annular adjustment top block 53 is located on the inner side of the blade root support and adjustment block 50, and the annular adjustment bolt 54 is located on the outer side of the blade root support and adjustment block 50. The annular adjustment top block 53 on each blade root support adjustment block 50 can be designed in blocks or as a whole. In this embodiment, the annular adjustment top block 53 is designed in three blocks, and the blade root contact surface of each block is respectively shaped according to the blade root. The bottom surface of the blade root support adjustment block 50 is provided with a block fixing screw hole 55 corresponding to the blade root block mounting hole 12, and the fixed connection with the main platform 10 is completed by bolts.

[0067] Further optimization, the main bracket 60, the main platform 10, the blade support adjustment block 40, the blade root support adjustment block 50 and the blade positioning adjustment ring 30 are made of one or more of conventional metal steel, aluminum alloy and iron; the bottom support disc 20 is made of one of conventional steel, aluminum alloy, iron or reinforced PP plate, reinforced PE plate and other plastic plates.

[0068] In the assembly tool of the present invention, the role of the blade root support adjustment block 50 is to initially support and fix the blades; and to fine-tune the position of the blades and support them through the top support device provided thereon. The role of the blade support adjustment block 40 is to further support the blades and maintain balance; and to adjust the height of the block through the height adjustment device provided thereon to ensure support for the blades. The role of the blade positioning adjustment ring 30 is to accurately locate the relative position between the blades; and to complete the final fixation of all blades together with the blade root support adjustment block 50.

[0069] Accordingly, the present invention further proposes a method for assembling a large-sized split composite propeller. The method assembles a large-sized split composite propeller, wherein the blade 210 includes a blade 211 and a blade root 212. The inner annular surface of the blade root 212 is provided with a dovetail boss 2121, and the outer annular surface of the hub 220 is provided with a dovetail groove 221. The blade root 212 and the hub 220 are assembled and connected through the dovetail boss 2121 and the dovetail groove 221. The assembly method is performed using the above-mentioned large-sized split composite propeller assembly tooling, and comprises the following steps:

[0070] S1. Installation preparation of assembly tooling:

[0071] S1.1. Complete the installation of the main support 60 and the main platform 10, and complete the horizontal leveling of the entire platform;

[0072] S1.2, complete the installation of the bottom support disc 20;

[0073] S1.3, complete the installation of the blade support adjustment block 40;

[0074] S1.4. Complete the installation of the blade root support adjustment block 50.

[0075] S2. Installation and initial positioning of propeller blades one by one:

[0076] S2.1. Slowly hoist the first blade to the main platform 10 and place it on one set of blade root support adjustment blocks 50 and blade positioning adjustment blocks, so that the blade root contacts the inner side of the blade root support adjustment block 50, and then adjust the height of the blade positioning adjustment block for support;

[0077] S2.2. Complete the preliminary assembly of all blades in sequence. For the assembly process, refer to Fig. 9 .

[0078] S3. Precise positioning of all propeller blades:

[0079] S3.1. Slowly hoist the blade positioning adjustment ring 30 into the reserved operation circular hole 13 until it reaches the bottom support disc 20. If it does not reach the bottom support disc 20, adjust the annular adjustment bolts 54 on all blade root support adjustment blocks 50, and then tap lightly with a wooden hammer to make the blade positioning adjustment ring 30 contact with the bottom support disc 20.

[0080] S3.2. Adjust the annular adjustment bolt 54 of the blade root positioning block so that the annular adjustment top block 53 presses against the corresponding blade root and the inner side of the blade root presses against the blade positioning adjustment ring 30; at the same time, adjust the height adjustment device of the blade support adjustment block 40 in linkage to ensure the horizontality and relative position accuracy of the blades; ensure that the annular adjustment top block 53 is in close contact with the outer side of the blade root and the inner side of the blade root is in close contact with the blade positioning adjustment ring 30, and the precise positioning of all blades is completed; refer to the assembly process for details. Fig.10 .

[0081] S4. Assemble the propeller hub: hoist the propeller hub above the blade and slowly move it downward along the dovetail guide rail inside the blade root until it contacts the upper end of the blade positioning adjustment ring 30. For the assembly process, refer to Fig.11 .

[0082] S5. First, the blade positioning adjustment ring 30 is suspended by a suspension rope, and then the bottom support ring is removed from below the main body bracket 60.

[0083] S6. Slowly lower the lifting rope and tap the upper end of the propeller hub lightly with a wooden hammer, gradually assembling the propeller hub until the gap between the upper end and the upper end of the blade root is 0 to 50 mm;

[0084] S7, removing the blade positioning adjustment ring 30;

[0085] S8. Complete the fixing of the connecting bolts of the hub and blades, that is, assemble them in place;

[0086] S9. The tiny gaps between the blades are filled to complete all the assembly.

[0087] The embodiments of the present invention are described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementation modes, which are merely illustrative rather than restrictive. Under the guidance of the present invention, ordinary technicians in this field can also make many forms without departing from the scope of protection of the present invention and the claims, all of which are within the protection of the present invention.

Claims

1. A large-size split composite propeller assembly tool, It is characterized in that It includes a main body platform, a bottom support disc, a blade positioning adjustment ring, a blade support adjustment block and a blade root support adjustment block; A reserved circular hole for operation with a diameter not less than the outer diameter of the hub is arranged in the middle of the main body platform; The diameter of the bottom support disc is not less than the diameter of the reserved operation circular hole, and the bottom support disc is arranged below the reserved operation circular hole and is fixedly mounted on the lower surface of the main platform in a detachable manner; The outer ring diameter of the blade positioning adjustment ring is consistent with the outer diameter of the hub, is located in the reserved operation circular hole and is placed on the bottom support disc; The number of the blade support adjustment block and the blade root support adjustment block is consistent with the number of blades of the split composite propeller, which is set to N. The N blade root support adjustment blocks are circumferentially distributed along the outer circle of the reserved operation circular hole and installed on the upper surface of the main body platform. The N blade support adjustment blocks are circumferentially distributed along the outer circle of the blade root support adjustment block and installed on the upper surface of the main body platform. The blade support adjustment blocks correspond to the blade root support adjustment blocks one by one, and are respectively used to support the blade and blade root of the same blade; The upper surface of the blade support and adjustment movable block is a first blade contact surface, which follows the shape of the blade of the paddle; A height adjustment device is provided on the blade support adjustment block, which is used to adjust the height of the blade support adjustment block to ensure support for the blade; the height adjustment device is a height adjustment bolt installed on the blade support adjustment block and arranged in the vertical direction; The upper surface of the blade root support and adjustment block is the second blade contact surface, which follows the shape of the blade of the blade; a radially movable support device is arranged on the side of the blade root support and adjustment block, and the inner side surface of the support device follows the shape of the blade root of the blade, and is used to apply radial force to the outer annular surface of the blade root to fine-tune the blade position and support the blade; the support device includes an annular adjustment top block and annular adjustment bolts which are coaxially arranged and connected, the annular adjustment top block is located on the inner side of the blade root support and adjustment block, and the annular adjustment bolt is located on the outer side of the blade root support and adjustment block.

2. The large-size split composite propeller assembly tool according to claim 1, It is characterized in that The inner annular surface of the blade root support and adjustment block is in conformity with the outer annular surface of the blade root of the blade, and a 0-40mm annular gap is reserved between the two.

3. The large-size split composite propeller assembly tool according to claim 1, It is characterized in that The installation position of the blade support adjustment block on the main platform is between 0.3R and 0.8R of the blade.

4. The large-size split composite propeller assembly tool according to claim 1, It is characterized in that A first limiting slot is provided at the bottom of the blade contact surface of the blade support and adjustment block, and a second limiting slot is provided at the bottom of the blade contact surface of the blade root support and adjustment block.

5. The large-size split composite propeller assembly tool according to claim 1, It is characterized in that A detachable lifting ring is installed inside the blade positioning and adjusting ring.

6. The large-size split composite propeller assembly tool according to claim 1, It is characterized in that It also includes a main body bracket, and the main body platform is fixedly installed on the upper end of the main body bracket; the bearing capacity of the main body bracket and the main body platform meets the assembly requirements, and the bearing weight is at least 1.5 times the mass of the propeller or more.

7. The large-size split composite propeller assembly tool according to claim 1, It is characterized in that The axial length of the blade positioning adjustment ring is smaller than the axial length of the blade root.

8. A method for assembling a large-sized split composite propeller, wherein the blade of the large-sized split composite propeller comprises a blade and a blade root, wherein the inner annular surface of the blade root is assembled and connected with the outer annular surface of the hub, It is characterized in that The assembly method is carried out using the large-size split composite propeller assembly tool according to any one of claims 1 to 7, and comprises the following steps: S1. Installation preparation of assembly tooling: including leveling of the main platform, installation of the bottom support disc, blade positioning adjustment block, and blade root support adjustment block; S2. Installation and initial positioning of propeller blades one by one: S2.

1. Slowly hoist the first propeller blade to the main platform and place it on one set of blade root support adjustment blocks and blade positioning adjustment blocks, so that the blade root contacts the inner side of the blade root support adjustment block, and then adjust the height of the blade positioning adjustment block for support; S2.

2. Complete the preliminary assembly of all blades in sequence; S3. Precise positioning of all propeller blades: S3.

1. Slowly hoist the blade positioning adjustment ring into the reserved circular hole for operation until it is on the bottom support disc; S3.

2. Adjust the supporting device of the blade root positioning block so that the inner side of the supporting device supports the corresponding blade root, and the inner side of the blade root supports the blade positioning adjustment ring; at the same time, adjust the height adjustment device of the blade support adjustment block in linkage to ensure the horizontality and relative position accuracy of the blade; S4. Assemble the propeller hub: hoist the propeller hub above the blade, and slowly move it downward along the dovetail guide rail on the inner side of the blade root until it contacts the upper end of the blade positioning adjustment ring; S5. First hold the blade positioning adjustment ring, and then remove the bottom support ring from under the main frame; S6. Slowly lower the blade positioning adjustment ring and gently tap the upper end of the hub. Gradually assemble the hub until the gap between the upper end and the upper end of the blade root is 0 to 50 mm. S7. Remove the blade positioning adjustment ring; S8. Complete the fixing of the connecting bolts between the hub and the blades, and the assembly is complete.

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