A rotor wire twisting and forming device for a doubly-fed wind turbine

Abstract

The present invention provides a double-fed wind turbine rotor wire twisting and forming device, which includes a base and two forming devices. The two forming devices are symmetrically arranged on the upper surface of the base with the central axis perpendicular to the base as the axis of symmetry. The forming device includes a bracket arranged on the base, a positioning cylinder arranged on the side of the bracket away from the other forming device, a moving die sleeved on one end of the positioning cylinder away from the other forming device, a fixing block arranged at the end of the positioning cylinder away from the moving die, a clamping device arranged on the fixing block, a positioning block arranged on the positioning cylinder, a U-shaped pressing block arranged on the moving die, and a hydraulic relay arranged on the moving die. One end of the hydraulic relay is arranged on the moving die, and the other end of the hydraulic relay is arranged on the base. By uniformly placing the copper busbars on this double-fed wind turbine rotor wire forming device for unified processing, the consistency of the rotor wires is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of generator manufacturing, and particularly relates to a twisting and forming device for the rotor wire of a doubly-fed wind turbine generator. Background Art

[0002] The rotor winding of a megawatt-level doubly-fed wind turbine generator adopts a wave winding structure. The rotor wire is divided into upper-layer wire and lower-layer wire, and the rotor wire is made of flat copper busbars with a complex shape. A single wire consists of 3 straight-line segments and 6 arc segments. When forming the rotor wire, not only bending in the thickness direction but also bending in the width direction is required. The width-to-thickness ratio of the flat copper busbar reaches up to 6:4 at most, making the processing and forming very difficult. The traditional process adopts a piece-by-piece forming method. First, the middle straight-line segment and 4 arc segments near the middle are formed. Before wire insertion, the large arcs at both ends are appropriately twisted. After inserting the lower-layer wire, the straight-line segments at both ends of the lower-layer rotor wire are manually formed with special tools. After inserting the upper-layer wire, the straight-line segments at both ends of the upper-layer rotor wire are manually formed with special tools. This has the disadvantages of high labor intensity, low production efficiency, and difficulty in ensuring product consistency.

[0003] Due to the poor consistency of the rotor wire, it has an adverse impact on subsequent rotor assembly, such as difficult shaping and increased dynamic balance. Summary of the Invention

[0004] The purpose of the present invention is to provide a twisting and forming device for the rotor wire of a doubly-fed wind turbine generator to solve the defects of the above-mentioned prior art.

[0005] The present invention is achieved by the following technical solutions:

[0006] A twisting and forming device for the rotor wire of a doubly-fed wind turbine generator includes a base and two forming devices. The two forming devices are symmetrically arranged on the upper surface of the base with the central axis perpendicular to the base as the axis of symmetry. The forming device includes a bracket arranged on the base, a positioning cylinder arranged on the side of the bracket far from the other forming device, a moving die sleeved on one end of the positioning cylinder far from the other forming device, a fixing block arranged at the end of the positioning cylinder far from the moving die, a clamping device arranged on the fixing block, a positioning block arranged on the positioning cylinder, a U-shaped pressing block arranged on the moving die, and a hydraulic booster arranged on the moving die. One end of the hydraulic booster is arranged on the moving die, and the other end of the hydraulic booster is arranged on the base.

[0007] By uniformly placing the copper busbars on this twisting and forming device for the rotor wire of a doubly-fed wind turbine generator for unified processing, the consistency of the rotor wire is improved.

[0008] Further, both ends of the hydraulic booster are respectively welded to the outer wall of the moving die on the side far from the positioning block and the base.

[0009] Further, the positioning block is detachably arranged on the outer wall of the positioning cylinder through bolts, the clamping device is detachably arranged on the fixed block, the U-shaped pressing block is detachably arranged on the moving mold, a clamping block for clamping the copper busbar is arranged on the U-shaped pressing block, and the clamping force of the clamping block is adjusted by threads.

[0010] Further, the surface of the positioning block facing the moving mold is a rotating surface a, and a rotating surface b matching the rotating surface a is arranged on the moving mold.

[0011] Further, the gap of the clamping device and the limiting gap of the positioning block are located on the same horizontal line.

[0012] In the initial state, the gaps of the clamping devices on the two forming devices, the limiting gaps of the positioning blocks, and the gaps of the U-shaped pressing blocks are all located on the same horizontal line to form an initial processing slot. The copper busbar to be processed is placed in the initial processing slot, and the two ends of the copper busbar are fixed by the U-shaped pressing block.

[0013] In the processing state, the moving mold rotates along the outer wall of the positioning cylinder under the action of the hydraulic servomotor, and the copper busbar between the positioning block and the U-shaped pressing block is squeezed in opposite directions by the rotating surface a on the positioning block and the rotating surface b on the moving mold to form a unified rotating surface.

[0014] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0015] A double-fed wind turbine rotor wire spinning and twisting forming device of the present invention improves the consistency of the rotor wire by uniformly placing the copper busbars on the double-fed wind turbine rotor wire spinning forming device for unified processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0017] Figure 1 It is a front view of the structure of the present invention.

[0018] Figure 2 It is a top view of the structure of the present invention.

[0019] Figure 3 It is a schematic structural diagram of the forming device of the present invention.

[0020] Marks in the drawings and corresponding component names:

[0021] 1 - Base, 2 - Molding device, 21 - Bracket, 22 - Hydraulic relay, 23 - Positioning cylinder, 24 - Fixed block, 25 - Clamping device, 26 - Positioning block, 27 - U-shaped pressing block, 28 - Moving die. Detailed implementation mode

[0022] To make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other implementation manners obtained by those of ordinary skill in the art without making creative efforts fall within the scope protected by the present invention.

[0023] The present invention will be further described below in conjunction with the accompanying drawings, but the protection scope of the present invention is not limited to the following.

[0024] Embodiment 1

[0025] As Figures 1-3 shown, a double-fed wind turbine rotor wire twisting and forming device of the present invention includes a base 1 and two forming devices 2. The two forming devices 2 are symmetrically arranged on the upper surface of the base 1 with the central axis perpendicular to the base 1 as the axis of symmetry. The forming device 2 includes a bracket 21 arranged on the base 1, a positioning cylinder 23 arranged on the side of the bracket 21 away from the other forming device 2, a moving die 28 sleeved on one end of the positioning cylinder 23 away from the other forming device 2, a fixed block 24 arranged on the end of the positioning cylinder 23 away from the moving die 28, a clamping device 25 arranged on the fixed block 24, a positioning block 26 arranged on the positioning cylinder 23, a U-shaped pressing block 27 arranged on the moving die 28, and a hydraulic relay 22 arranged on the moving die 28. One end of the hydraulic relay 22 is arranged on the moving die 28, and the other end of the hydraulic relay 22 is arranged on the base 1.

[0026] By uniformly placing the copper busbars on the double-fed wind turbine rotor wire forming device for unified processing, the consistency of the rotor wires is improved.

[0027] Embodiment 2

[0028] Based on Embodiment 1, both ends of the hydraulic relay 22 are respectively welded to the outer wall of the moving die 28 on the side away from the positioning block 26 and the base 1.

[0029] The positioning block 26 is detachably arranged on the outer wall of the positioning cylinder 23 through bolts. The clamping device 25 is detachably arranged on the fixed block 24. The U-shaped pressing block 27 is detachably arranged on the moving die 28. A clamping block for clamping the copper busbar is arranged on the U-shaped pressing block 27, and the clamping force of the clamping block is adjusted through threads.

[0030] One side of the positioning block 26 facing the moving mold 28 is a rotating surface a, and a rotating surface b matching the rotating surface a is arranged on the moving mold 28.

[0031] The slit of the clamping device 25 and the limiting slit of the positioning block 26 are on the same horizontal line.

[0032] In the initial state, the slits of the clamping devices 25 on the two forming devices 2, the limiting slits of the positioning blocks 26, and the slits of the U-shaped pressing blocks are all on the same horizontal line and form an initial processing slot. The copper busbar to be processed is placed in the initial processing slot, and the two ends of the copper busbar are fixed by the U-shaped pressing block 27.

[0033] In the processing state, the moving mold 28 rotates along the outer wall of the positioning cylinder 23 under the action of the hydraulic servomotor 22, and the copper busbar between the positioning block 26 and the U-shaped pressing block 27 is squeezed by the rotating surface a on the positioning block 26 and the rotating surface b on the moving mold 28 to form a unified rotating surface.

[0034] A double-fed wind turbine rotor wire spinning and twisting forming device of the present invention improves the consistency of the rotor wire by uniformly placing the copper busbar on the double-fed wind turbine rotor wire spinning forming device for unified processing.

[0035] The above specific embodiments further elaborate on the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above are only specific embodiments of the present invention and are not used to limit the protection scope of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A rotor wire twisting and forming device for a doubly-fed wind turbine, characterized in that, It includes a base (1) and two forming devices (2). The two forming devices (2) are symmetrically arranged on the upper surface of the base (1) with the central axis perpendicular to the base (1) as the axis of symmetry. The forming device (2) includes a bracket (21) arranged on the base (1), a positioning cylinder (23) arranged on the side of the bracket (21) away from the other forming device (2), a moving mold (28) sleeved on one end of the positioning cylinder (23) away from the other forming device (2), a fixing block (24) arranged on the end of the positioning cylinder (23) away from the moving mold (28), a clamping device (25) arranged on the fixing block (24), a positioning block (26) arranged on the positioning cylinder (23), a U-shaped pressing block (27) arranged on the moving mold (28), and a hydraulic servomotor (22) arranged on the moving mold (28). One end of the hydraulic servomotor (22) is arranged on the moving mold (28), and the other end of the hydraulic servomotor (22) is arranged on the base (1). The surface of the positioning block (26) facing the moving mold (28) is a rotating surface a, and a rotating surface b matching the rotating surface a is arranged on the moving mold (28). The gap of the clamping device (25) and the limiting gap of the positioning block (26) are on the same horizontal line. In the initial state, the gaps of the clamping devices (25) on the two forming devices (2), the limiting gaps of the positioning blocks (26), and the gaps of the U-shaped pressing blocks are all on the same horizontal line and form an initial processing slot. The copper busbar to be processed is placed in the initial processing slot, and the two ends of the copper busbar are fixed by the U-shaped pressing block (27). In the processing state, the moving mold (28) rotates along the outer wall of the positioning cylinder (23) under the action of the hydraulic servomotor (22), and the copper busbar between the positioning block (26) and the U-shaped pressing block (27) is squeezed by the rotating surface a on the positioning block (26) and the rotating surface b on the moving mold (28) to form a unified rotating surface.

2. The double-fed wind turbine rotor wire twisting and forming device according to claim 1, characterized in that, Both ends of the hydraulic servomotor (22) are welded to the outer wall of the moving mold (28) on the side away from the positioning block (26) and the base (1) respectively.

3. A rotor wire twisting and forming device for a doubly-fed wind turbine according to claim 1, characterized in that The positioning block (26) is detachably arranged on the outer wall of the positioning cylinder (23) through bolts. The clamping device (25) is detachably arranged on the fixing block (24). The U-shaped pressing block (27) is detachably arranged on the moving mold (28). A clamping block for clamping the copper busbar is arranged on the U-shaped pressing block (27), and the clamping force of the clamping block is adjusted by threads.

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