Process for manufacturing a fan impeller

Abstract

The application discloses a fan impeller manufacturing process, which comprises the following steps: S1, preparing the following materials: a rear disc, a front disc, an inner reinforcing ring, an outer reinforcing ring and blades; S2, welding the blades on the rear disc and welding the inner reinforcing ring and the outer reinforcing ring on all the blades; and S3, installing the front disc on the blades. The fan impeller manufacturing process solves the problem that the arc-shaped front disc cannot be installed on the blades in the prior art.

Description

Technical Field

[0001] This invention relates to the field of wind turbine component manufacturing, specifically to a wind turbine impeller manufacturing process. Background Technology

[0002] Chinese patent discloses a high-efficiency fan impeller with an arc-shaped front disc, application number CN2019219054340. This high-efficiency fan impeller with an arc-shaped front disc includes: a front disc, a rear disc, a shaft disc, and several blades. The front disc and rear disc are fastened together to form a rotating cavity. An air inlet communicating with the rotating cavity is opened on the front disc, and an installation port opposite to the air inlet is opened on the rear disc. The shaft disc is conical in shape and allows the rotating shaft of a centrifugal fan to pass through it, extending into the rotating cavity. Several blades are installed at the end of the rotating shaft located within the rotating cavity. A first guide surface protrudes from the surface of the front disc near the rear disc, and the first guide surface is arc-shaped. The first guide surface is used to guide the airflow blades entering through the air inlet.

[0003] Although the high-efficiency fan impeller with an arc-shaped front plate can solve the problem of reduced air intake and exhaust efficiency caused by the flat inclined surface of the front plate near the rear plate in the existing technology, the high-efficiency fan impeller with an arc-shaped front plate still has the following drawback: the arc-shaped front plate cannot be installed on the blades, which makes it impossible to mass-produce the high-efficiency fan impeller with an arc-shaped front plate. Summary of the Invention

[0004] This invention provides a manufacturing process for wind turbine impellers, solving the problem in the prior art that the arc-shaped front disc cannot be installed on the blades.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: This invention discloses a manufacturing process for a wind turbine impeller, comprising the following steps: S1. Prepare the following materials: rear disc, front disc, inner reinforcing ring, outer reinforcing ring, and blades; S2. Weld the blades to the rear disc, and weld the inner and outer reinforcing rings to all the blades; S3. Install the front disc onto the blade.

[0006] Preferably, the steps for manufacturing the blades in step S1 are as follows: S11. Prepare the raw material of the plate and cut the raw material of the plate using cutting equipment to obtain the blade blank; S12. Use a punching machine to punch the blade blank to obtain a plate-shaped blade with a first notch and a second notch; S13. Use a plate rolling machine to roll the plate-shaped blade into an arc shape to obtain the blade.

[0007] Preferably, step S2 includes the following steps: S21. Draw the installation position of each blade on the rear plate; S22. Place the blade in the mounting position on the rear plate, with the blade perpendicular to the rear plate; S23. Weld the blades to the mounting position on the rear disc; S24. When three blades are welded together, insert the inner reinforcing ring into the first notch on the blade and weld the inner reinforcing ring onto the three blades. Put the outer reinforcing ring over the three blades and insert the outer reinforcing ring into the second notch. Weld the outer reinforcing ring onto the blade. S25. Weld the remaining blades according to steps S22 and S23.

[0008] Preferably, S3 includes the following steps: S31. Place the front disc above the blades; S32. Observe the fit between the inner arc line of the front disc and the upper arc line of the blade to see if there are any gaps. Then measure the total height and compare it with the height required by the drawing to repair the front disc to the height required by the process drawing. S33. Adjust the concentricity of the front and rear discs: Using the center of the rear disc as a reference, measure the distance from the inner wall of the front disc to the center of the rear disc. Measure at least four distances d from the inner wall of the front disc to the center of the rear disc, and determine whether the difference in all d values ​​is within the specified range.

[0009] Preferably, after step S2 and before step S3, the following step is performed: installing a reinforcing disc around the rear disc.

[0010] Compared with the prior art, the present invention has the following beneficial effects: This technology enables the installation of an arc-shaped front disc on the blades, allowing for the mass production of this high-efficiency wind turbine impeller with an arc-shaped front disc, thus meeting the requirements of modern production.

[0011] Other advantages, objectives and features of the present invention will become apparent in part from the following description, and in part from those skilled in the art through study and practice of the invention. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the conical disk structure produced in S114.

[0013] Figure 2 This is a structural diagram of the finished front disc.

[0014] Figure 3 The plate-shaped blade in S12 has a first notch and a second notch.

[0015] Figure 4 A schematic diagram of the structure for mounting the blades and front disc on the mounting platform.

[0016] Figure 5 A cross-sectional view showing the installation of the blades and front disc on the mounting platform.

[0017] Reference numerals: Rear plate 1, Front plate 2, Conical plate 20, Inner reinforcing ring 3, Outer reinforcing ring 4, Blade 5, First notch 51, Second notch 52, Bearing platform 60, Center positioning post 61, Support foot 62, First pad 63, Mounting base 64, Second pad 65, Center positioning block 66, Arc surface 660, First arc surface 661, Second arc surface 662, Elastic ring 67, Mounting screw ring 68, Extrusion ring 69. Detailed Implementation

[0018] To make the technical means, creative features, objectives and effects of this invention clearer and easier to understand, the invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0019] like Figures 1 to 5 As shown, this invention discloses a manufacturing process for a wind turbine impeller, comprising the following steps: S1. Prepare the following materials: rear disc 1, front disc 2, inner reinforcing ring 3, outer reinforcing ring 4, and blades 5; S2. Weld the blades 5 onto the rear disc 1, and weld the inner reinforcing ring 3 and the outer reinforcing ring 4 onto all the blades 5; S3. Install the front disc 2 onto the blade 5.

[0020] The steps for making blade 5 in step S1 are as follows: S11. Prepare the raw material of the board and cut the raw material of the board using cutting equipment to obtain the blank of blade 5. S12. The blade 5 blank is punched using a punching device to obtain a plate-shaped blade 5 with a first notch 51 and a second notch 52. S13. The plate-shaped blade 5 is rolled into an arc shape using a plate rolling machine to obtain blade 5. This realizes the production of blade 5 and provides an installation foundation for the installation of inner reinforcing ring 3 and outer reinforcing ring 4. The first notch 51 and the second notch 52 provide a foundation for installation.

[0021] Preferably, step S2 includes the following steps: S21. Draw the installation position of each blade 5 on the rear plate 1; S22. Place the blade 5 in the mounting position on the rear plate 1, with the blade 5 perpendicular to the rear plate 1; S23. Weld blade 5 to the mounting position on rear disc 1; S24. When the blades 5 are welded to 3 pieces, insert the inner reinforcing ring 3 into the first notch 51 on the blade 5, and weld the inner reinforcing ring 3 onto the three blades 5. Put the outer reinforcing ring 4 on the outside of the three blades 5, insert the outer reinforcing ring 4 into the second notch 52, and weld the outer reinforcing ring 4 onto the blades 5. S25. Weld the remaining blade 5 according to steps S22 and S23.

[0022] S3 includes the following steps: S31. Place the front disc 2 above the blade 5; S32. Observe the fit between the inner arc line of the front disc 2 and the upper arc line of the blade 5 to see if there are any gaps. Then measure the total height and compare it with the height required by the drawing to repair the front disc 2 to the height required by the process drawing. S33. Adjust the concentricity of the front disc 2 and the rear disc 1: Using the center of the rear disc 1 as a reference, measure the distance from the inner wall of the front disc 2 to the center of the rear disc 1. Measure at least four distances d from the inner wall of the front disc 2 to the center of the rear disc 1, and determine whether the difference of all d values ​​is within the specified range.

[0023] After step S2 and before step S3, the following steps are performed: a reinforcing disc is installed around the rear disc 1. This prevents deformation of the rear disc 1 during subsequent processes and ensures that the shape of the rear disc 1 remains unchanged.

[0024] The steps for manufacturing the front disc 2 in step S1 are as follows: S111, prepare the sheet material; S112, cut the sheet material into two fan-shaped plates, with the splicing edges of the fan-shaped plates forming a bevel; S113, splice the two fan-shaped plates to form a whole piece; S114, assemble the whole piece into a conical disc 20, and weld the splicing joint; S115, rotate the conical disc 20 to the spinning machine, and the spinning machine spins the conical disc 20 into an arc-shaped front disc 2. This completes the production of the front disc 2.

[0025] Step S3 involves fabricating an auxiliary installation platform. The auxiliary installation platform includes: a support platform 60, a central positioning post 61, a support foot 62, a first pad 63, a mounting base 64, a second pad 65, a central positioning block 66, an elastic ring 67, a mounting screw ring 68, and a compression ring 69. The rear plate 1 is placed on the support platform 60. The central positioning post 61 is fixed to the support platform 60 and inserted into the opening of the rear plate 1. The support foot 62, which has an L-shaped structure, is inserted into the support platform 60 and supports the bottom edge of the front plate 2. A first pad 63 is placed between the support platform 60 and the rear plate 1. The height of the first pad 63 can be adjusted to control the height of the top surface of the support foot 62, thereby adjusting the height of the bottom edge of the front plate 2. A second pad 65 is supported on the rear plate 1, and a mounting base 64 is supported on the second pad 65. A central positioning block 66 that can move radially is installed in the mounting base 64. The central positioning block 66 is provided with an arc-shaped surface 660, which supports the top inner wall of the front plate 2 and can be in close contact with the top inner wall of the front plate 2. The central positioning block 66 is at least There are three, and all the center positioning blocks 66 are surrounded by elastic rings 67. The elastic rings 67 are used to keep the center positioning blocks 66 relatively close, ensuring that the center positioning blocks 66 and the mounting base 64 can pass through the top of the front disc 2. The mounting base 64 is for the center positioning post 61 to be inserted. A mounting screw ring 68 is placed on the mounting base 64. The mounting screw ring 68 is externally threaded to a compression ring 69. The outer wall of the compression ring 69 forms a first arc surface 661, and the inner side of the center positioning block 66 forms a second arc surface 662. The first arc surface 661 and the second arc surface 662 are connected. The first arc surface 661 is tightly attached to the second arc surface 662, and all the second arc surfaces 662 surround the first arc surface 661. The first arc surface 661 is used to press the second arc surfaces 662 away from each other. By adjusting the height of the extrusion ring 69 on the mounting screw ring 68, the position of the center positioning block 66 can be adjusted. The mounting screw ring 68 is relatively heavy and can be kept in position on the mounting seat 64. The mounting seat 64 can be detached from the center positioning post 61, the support foot 62 can be detached from the bearing platform 60, and the mounting screw ring 68 and the extrusion ring 69 can be detached from the mounting seat 64. By ensuring that the bottom edge of the front disc 2 is in contact with the top surface of the support foot 62, and that the inner wall of the top of the front disc 2 is tightly attached to the inner wall of the center positioning block 66, the concentricity of the front disc 2 and the rear disc 1 can be ensured, thus ensuring the quality of the entire impeller after assembly.

[0026] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A manufacturing process for a wind turbine impeller, characterized in that, Includes the following steps: S1. Prepare the following materials: rear disc, front disc, inner reinforcing ring, outer reinforcing ring, and blades; S2. Weld the blades to the rear disc, and weld the inner and outer reinforcing rings to all the blades; S3. Install the front disc onto the blade; The steps for making the blades in step S1 are as follows: S11. Prepare the raw material of the plate and cut the raw material of the plate using cutting equipment to obtain the blade blank; S12. Use a punching machine to punch the blade blank to obtain a plate-shaped blade with a first notch and a second notch; S13. Use a plate rolling machine to roll the plate-shaped blade into an arc shape to obtain the blade; Step S2 includes the following steps: S21. Draw the installation position of each blade on the rear plate; S22. Place the blade in the mounting position on the rear plate, with the blade perpendicular to the rear plate; S23. Weld the blades to the mounting position on the rear disc; S24. When three blades are welded together, insert the inner reinforcing ring into the first notch on the blade and weld the inner reinforcing ring onto the three blades. Put the outer reinforcing ring over the three blades and insert the outer reinforcing ring into the second notch. Weld the outer reinforcing ring onto the blade. S25. Weld the remaining blades according to steps S22 and S23; S3 includes the following steps: S31. Place the front disc above the blades; S32. Observe the fit between the inner arc line of the front disc and the upper arc line of the blade to see if there are any gaps. Then measure the total height and compare it with the height required by the drawing to repair the front disc to the height required by the process drawing. S33. Adjust the concentricity of the front and rear discs: Using the center of the rear disc as a reference, measure the distance from the inner wall of the front disc to the center of the rear disc. Measure the distance d from the inner wall of the front disc to the center of the rear disc at least four times, and determine whether the difference of all d values ​​is within the specified range. Step S3 involves fabricating an auxiliary installation platform, which includes: a support platform, a central positioning post, support feet, a first pad, a mounting base, a second pad, a central positioning block, an elastic ring, a mounting screw ring, and a compression ring. The rear disc is placed on the support platform, and the central positioning post is fixed to the platform and inserted into the opening of the rear disc. Support feet, L-shaped structures, are inserted into the support platform, supporting the bottom edge of the front disc. A first pad, adjustable in height, is placed between the support feet and the support platform. A second pad supports the rear disc, and a mounting base is supported on the second pad. A central positioning block, capable of radial movement, is installed within the mounting base. The block has an arc-shaped surface that supports the inner wall of the front disc top and can fit tightly against the inner wall of the front disc top. There are at least three center positioning blocks, and all center positioning blocks are surrounded by elastic rings. The elastic rings are used to allow the center positioning blocks to be relatively close. A mounting base is used to insert the center positioning post. A mounting screw ring is placed on the mounting base, and a compression ring is connected to the external thread of the mounting screw ring. The outer wall of the compression ring forms a first arc surface, and the inner side of the center positioning block forms a second arc surface. The first arc surface and the second arc surface are in close contact. All second arc surfaces are surrounded by the first arc surface. The first arc surface is used to compress the second arc surfaces to keep them away from each other. The position of the center positioning block can be adjusted by adjusting the height of the compression ring on the mounting screw ring.

2. The fan impeller manufacturing process according to claim 1, characterized in that, After step S2 and before step S3, perform the following steps: install a reinforcing disc around the rear disc.

Images