Positioning and sleeving method for vertical shell entering of wind driven generator stator
By setting arc positioning plates and cantilever long strips on the wind turbine stator, and using vertical guide rods on the machine base to achieve vertical guidance of the stator, the inefficient alignment quality and efficiency during the stator shell assembly process is solved. The problem is to realize the accurate positioning of the stator and the base and simplify the wiring work.
Patent Information
- Application Number
- CN202411448787.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-17
- Publication Date
- 2025-02-25
AI Technical Summary
During the assembly process of stator in the existing wind turbine, the alignment quality and assembly efficiency of the stator and the base are low, which is prone to the angle misalignment of the copper bar and the terminal block, resulting in complicated subsequent wiring work.
Using a combined structure of arc positioning plate and cantilever long strip plate, the alignment of the semi-arc grooves is positioned through the vertical guide rod on the machine base and the guide rod on the stator to realize the vertical position of the stator during the shell of the machine base. Direct guide ensures accurate positioning of the stator and the base.
Through this method, the accurate alignment between the stator and the base is achieved, the subsequent wiring work is simplified, the assembly efficiency and quality is improved, and the need for readjustment and special-shaped connection copper rows caused by angle misalignment are avoided.
Smart Images
Figure CN119519285A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the assembly of a wind generator, in particular to a positioning and assembly method for vertically inserting a stator of a wind generator into a shell. Background Art
[0002] After the stator of the wind turbine is embedded with wires and dipped in paint, the stator needs to be put on the base as a whole to complete the assembly of the motor stator and the base. The specific process is: first embed the stator coil on the stator core, weld the conductive ring on the lead wire of the stator coil, and position and weld the lead copper bar on the conductive ring. The conductive ring with the lead copper bar and the stator coil are dipped in paint together with the stator core to form a stator that can be assembled as a whole. When the stator is put into the base, it is usually carried out by the heat-shrink process and the base is assembled vertically. The machine base needs to be heated before installation. Since the heated machine base is not convenient for personnel to operate close to it for a long time, and the large diameter is not convenient for manual control of the installation angle, it is difficult to install the stator machine base without the help of an external force device. Generally, a positioning connection bracket for connecting copper bars is arranged at a fixed position on the motor machine base. The stator is hoisted by a lifting plate to the top of the machine base placed vertically after heating. The stator is assembled into the machine base by lowering the height of the lifting plate to complete the interference fit assembly of the stator and the machine base. Then, the connecting copper bars on the stator are connected to the positioning connection bracket on the machine base. Since the connecting copper bars are wider hard copper plates, it is necessary to align the position of the connecting copper bars on the stator with the positioning connection bracket on the machine base when the stator is put into the shell, so that the connection copper bars on the stator and the positioning connection bracket on the machine base can be connected smoothly after entering the shell. The prior art completes the positioning control of the assembly of the stator and the machine base by the following method: respectively setting alignment mark scale lines on the machine base and the stator. The two scale lines on the stator are aligned to achieve accurate assembly of the stator and the base. The alignment of the two scale lines is achieved through visual inspection by the operator. Due to the error of naked eye observation and the shaking of the stator during shell hoisting, it is easy to cause angular misalignment between the lead-out copper bar on the assembled stator and the positioning connection bracket on the base. The positioning connection bracket needs to be re-adjusted after shell insertion. If the deviation angle is too large, it is necessary to re-make the special-shaped connecting copper bar, which leads to low assembly alignment quality and efficiency of the stator into the shell. Summary of the invention
[0003] The invention provides a positioning and assembling method for a wind generator stator when it is vertically inserted into a shell, which solves the technical problems of low assembly alignment quality and assembly efficiency when the stator is inserted into the shell.
[0004] The present invention solves the above technical problems through the following technical solutions: A positioning tool used when the stator and the base of a wind turbine generator are assembled, comprising a base and a stator placed vertically, a stator winding lead-out copper bar connection seat bracket is fixedly arranged on the shell of the base, a stator winding lead-out copper bar connection seat is fixedly arranged on the stator winding lead-out copper bar connection seat bracket, an end cover connection flange is arranged on the top of the vertically placed base, and end cover connection threaded holes are arranged at equal intervals on the end cover connection flange; two groups of conductive rings are arranged on the upper end of the vertically placed stator, and a first group of lead-out copper is connected to the first group of conductive rings. The first group of copper bars are connected to the second group of conductive rings, an arc-shaped positioning plate is arranged between the first group of copper bars and the second group of copper bars, a positioning cantilever strip is connected to the arc-shaped positioning plate, and a guide rod positioning semi-arc groove is arranged at the outer end of the positioning cantilever strip; a vertical guide rod is arranged in the end cover connecting threaded hole on the end cover connecting flange above the stator winding lead-out copper bar connecting seat bracket; the stator is hoisted just above the vertically placed machine base, and the vertical guide rod is arranged in the guide rod positioning semi-arc groove.
[0005] The machine base is heated before being fitted, and the stator is fitted into the machine base using a heat-shrink process.
[0006] A method for positioning and assembling a wind turbine stator when it is vertically inserted into a shell, comprising a vertically placed machine base and a stator, a stator winding lead-out copper bar connection seat bracket is fixedly arranged on the shell of the machine base, a stator winding lead-out copper bar connection seat is fixedly arranged on the stator winding lead-out copper bar connection seat bracket, an end cover connection flange is arranged on the top of the vertically placed machine base, and end cover connection threaded holes are arranged on the end cover connection flange at equal intervals; two groups of conductive rings are arranged on the upper end of the vertically placed stator, a first group of lead-out copper bars are connected to the first group of conductive rings, and a second group of lead-out copper bars are connected to the second group of conductive rings, comprising the following steps: The first step is to manufacture an arc-shaped positioning plate connecting the first group of lead-out copper bars and the second group of lead-out copper bars according to the spacing between the two lead-out copper bars, process a positioning cantilever long strip plate, and process a guide rod positioning semi-arc groove at the outer end of the positioning cantilever long strip plate; The second step is to weld the arc-shaped positioning plate between the first group of lead-out copper bars connected to the first group of conductive rings arranged at the upper end of the vertically placed stator and the second group of lead-out copper bars connected to the second group of conductive rings; The third step is to fix the positioning cantilever strip plate to the arc positioning plate, and make the distance between the guide rod positioning semi-arc groove at the outer end of the positioning cantilever strip plate and the stator center axis equal to the distance between the end cover connection threaded hole and the base center axis; Step 4: After preheating the machine base, place it vertically on the assembly platform, and connect the vertical guide rod to the end cover connection threaded hole on the end cover connection flange above the stator winding copper bar connection seat bracket; Step 5: Use the hoisting equipment to vertically hoist the stator to the top of the preheated machine base; Step 6: By adjusting the angle of the hanger, the upper end of the vertical guide rod is set in the guide rod positioning semi-arc groove, so that the vertical guide rod becomes the guide rod for the stator to fall vertically; Step 7: Use the lifting equipment to make the stator drop vertically and fit into the base, thereby completing the shrink-fit assembly of the stator and the base.
[0007] Step 8. Remove the vertical guide rod from the machine base, and then remove the arc positioning plate; then, connect the connecting copper bars between the first group of lead-out copper bars and the second group of lead-out copper bars and the stator winding lead-out copper bar connecting seat.
[0008] According to the more demanding alignment structural characteristics of the connecting copper bar, the present invention temporarily arranges an arc-shaped positioning plate and a cantilevered long strip plate on the stator lead-out copper bar for positioning, and the alignment of the semi-arc-shaped groove is positioned by the vertical guide rod on the machine base and the guide rod on the long strip plate, so that a vertical guide is arranged in the process of the stator entering the shell machine base, thereby realizing accurate positioning of the angle of the stator and the machine base after being assembled, so that the stator lead-out copper bar and the wiring seat on the machine base are more accurately aligned, which facilitates the smooth and normal progress of subsequent wiring work. BRIEF DESCRIPTION OF THE DRAWINGS
[0009] Figure 1 It is a schematic diagram of the structure of the stator 6 and the base 1 of the present invention when they are assembled in a plan view; Figure 2 It is a schematic structural diagram of the stator 6 and the base 1 of the present invention when they are assembled in the main viewing direction; Figure 3 It is a schematic structural diagram of the machine base 1 of the present invention when viewed from above; Figure 4 is a schematic structural diagram of the stator 6 of the present invention in a top view; Figure 5 This is a diagram showing the coordination relationship between the arc-shaped positioning plate 10 and the positioning cantilever long strip plate 11 of the present invention; Figure 6 It is a schematic structural diagram of the stator 6 and the base 1 of the present invention before being assembled. DETAILED DESCRIPTION
[0010] The present invention is described in detail below in conjunction with the accompanying drawings: A positioning tool used when the stator and the base of a wind turbine generator are assembled, comprising a base 1 and a stator 6 placed vertically, a stator winding lead-out copper bar connection seat bracket 2 is fixedly arranged on the shell of the base 1, a stator winding lead-out copper bar connection seat is fixedly arranged on the stator winding lead-out copper bar connection seat bracket 2, an end cover connection flange 3 is arranged at the top of the vertically placed base 1, and end cover connection threaded holes 4 are arranged at equal intervals on the end cover connection flange 3; two groups of conductive rings 7 are arranged on the upper end of the vertically placed stator 6, a first group of lead-out copper bars 8 are connected to the first group of conductive rings, and a first group of lead-out copper bars 8 are connected to the second group of conductive rings. A second group of lead-out copper bars 9 are connected to the conductive ring, an arc-shaped positioning plate 10 is arranged between the first group of lead-out copper bars 8 and the second group of lead-out copper bars 9, a positioning cantilever long strip plate 11 is connected to the arc-shaped positioning plate 10, and a guide rod positioning semi-arc groove 12 is arranged at the outer end of the positioning cantilever long strip plate 11; a vertical guide rod 5 is arranged in the end cover connecting threaded hole 4 on the end cover connecting flange 3 above the stator winding lead-out copper bar connecting seat bracket 2; the stator 6 is hoisted to the top of the vertically placed machine base 1, and the vertical guide rod 5 is arranged in the guide rod positioning semi-arc groove 12.
[0011] The base 1 is heated before being mounted, and the stator 6 is mounted into the base 1 by a heat-shrink process.
[0012] A method for positioning and assembling a wind turbine stator when it is vertically inserted into a shell, comprising a vertically placed machine base 1 and a stator 6, a stator winding lead-out copper bar connection seat bracket 2 is fixedly arranged on the shell of the machine base 1, a stator winding lead-out copper bar connection seat is fixedly arranged on the stator winding lead-out copper bar connection seat bracket 2, an end cover connection flange 3 is arranged at the top of the vertically placed machine base 1, and end cover connection threaded holes 4 are arranged at equal intervals on the end cover connection flange 3; two groups of conductive rings 7 are arranged at the upper end of the vertically placed stator 6, a first group of lead-out copper bars 8 are connected to the first group of conductive rings, and a second group of lead-out copper bars 9 are connected to the second group of conductive rings, comprising the following steps: The first step is to manufacture an arc-shaped positioning plate 10 connecting the first group of lead-out copper bars 8 and the second group of lead-out copper bars 9 according to the spacing between the two lead-out copper bars, and to manufacture a positioning cantilever strip plate 11. At the outer end of the positioning cantilever strip plate 11, a guide rod positioning semi-arc groove 12 is manufactured; The second step is to weld the arc-shaped positioning plate 10 between the first group of lead-out copper bars 8 connected to the first group of conductive rings arranged at the upper end of the vertically placed stator 6 and the second group of lead-out copper bars 9 connected to the second group of conductive rings; Step 3: Fix the positioning cantilever strip plate 11 to the arc-shaped positioning plate 10, and make the distance between the guide rod positioning semi-arc groove 12 at the outer end of the positioning cantilever strip plate 11 and the stator center axis equal to the distance between the end cover connecting threaded hole 4 and the base center axis; Step 4: After preheating the machine base 1, place it vertically on the assembly platform, and connect the vertical guide rod 5 to the end cover connecting threaded hole 4 on the end cover connecting flange 3 above the stator winding copper bar connecting seat bracket 2; Step 5: Use the hoisting equipment to vertically hoist the stator 6 to the top of the preheated machine base 1; Step 6: By adjusting the angle of the hanger, the upper end of the vertical guide rod 5 is set in the guide rod positioning semi-arc groove 12, so that the vertical guide rod 5 becomes the guide rod for the stator 6 to fall vertically; Step 7: Use the hoisting equipment to make the stator 6 drop vertically and fit into the machine base 1, thereby completing the shrink-fit assembly of the stator 6 and the machine base 1.
[0013] Step 8: Remove the vertical guide rod 5 from the machine base 1, and then remove the arc positioning plate 10; then, connect the copper bars between the first group of lead-out copper bars 8 and the second group of lead-out copper bars 9 and the stator winding lead-out copper bar connection seat.
Claims
1. A method for positioning and fitting a wind turbine stator when it is vertically inserted into a shell, comprising a vertically placed machine base (1) and a stator (6), a stator winding lead-out copper bar connection seat bracket (2) being fixedly arranged on the shell of the machine base (1), a stator winding lead-out copper bar connection seat being fixedly arranged on the stator winding lead-out copper bar connection seat bracket (2), an end cover connection flange (3) being arranged at the top end of the vertically placed machine base (1), and end cover connection threaded holes (4) being arranged at equal intervals of arc on the end cover connection flange (3); two groups of conductive rings (7) being arranged at the upper end of the vertically placed stator (6), a first group of lead-out copper bars (8) being connected to the first group of conductive rings, and a second group of lead-out copper bars (9) being connected to the second group of conductive rings, characterized by the following steps: The first step is to manufacture an arc-shaped positioning plate (10) connecting the first group of lead-out copper bars (8) and the second group of lead-out copper bars (9) according to the spacing between the two lead-out copper bars, and to manufacture a positioning cantilever long strip plate (11). At the outer end of the positioning cantilever long strip plate (11), a guide rod positioning semi-arc groove (12) is manufactured; The second step is to weld the arc-shaped positioning plate (10) between the first group of lead-out copper bars (8) connected to the first group of conductive rings provided at the upper end of the vertically placed stator (6) and the second group of lead-out copper bars (9) connected to the second group of conductive rings; Step 3: fix the positioning cantilever strip plate (11) to the arc-shaped positioning plate (10), and make the distance between the guide rod positioning semi-arc groove (12) at the outer end of the positioning cantilever strip plate (11) and the stator center axis equal to the distance between the end cover connecting threaded hole (4) and the machine base center axis; Step 4: After preheating the machine base (1), place it vertically on the assembly platform, and connect the vertical guide rod (5) to the end cover connection threaded hole (4) on the end cover connection flange (3) above the stator winding lead-out copper bar connection seat bracket (2); Step 5: Use a hoisting device to vertically hoist the stator (6) to the top of the preheated machine base (1); Step 6: By adjusting the angle of the sling, the upper end of the vertical guide rod (5) is set in the guide rod positioning semi-arc groove (12), so that the vertical guide rod (5) becomes the guide rod for the stator (6) to fall vertically; Step 7: Using the lifting equipment, the stator (6) is vertically dropped and fitted into the machine base (1), thereby completing the shrink-fit assembly of the stator (6) and the machine base (1).
2. A method for positioning and mounting a wind turbine stator when it is vertically inserted into a shell according to claim 1, characterized in that: Step 8: Remove the vertical guide rod (5) from the machine base (1), and then remove the arc-shaped positioning plate (10); then, connect the first group of lead-out copper bars (8) and the second group of lead-out copper bars (9) to the stator winding lead-out copper bar connection seat.