Method and device for removing thickness of edge-wound coil in hydro generator or in motor rotor

Abstract

The invention discloses a method and a device for removing thicknesses of edge-wound coils in hydro generators or in motor rotors. The device comprises a bracket mounted on the bottom of the device and a sharpener fixed above the bracket. The sharpener is connected with a controller and a start button is arranged on the top of the sharpener. The device is positioned between a coil-press device and a forming die for edge-wound coils. A motor is connected with the bottom of the forming die for edge-wound coils. Two grinding heads are arranged inside the sharpener. According to this arrangement, the sections of the edge-wound coils to be thickened are processed by the device to thin out in advance, so that the thicknesses in the dead corners of the inner circles formed in winding the edge-wound coils are cancelled out by the sections thinned out by the device in advance, and therefore, the obvious thicknesses can be avoided. Accordingly, manpower and time can be saved, operation can be simplified and the safety in using edge-wound coils can be improved significantly.

Description

technical field [0001] The invention relates to a method and device for dethickening an edgewise coil in a hydraulic generator or motor rotor. Background technique [0002] exist Coils wound with flat copper wires are generally used in large and medium hydroelectric generator rotors or large motor rotors. Flat copper wire refers to a copper bare wire with a rectangular cross-sectional shape, and the long side (that is, the width, represented by b) is much larger than the short side (that is, the thickness, represented by a). Flat wound coil means that the coil is wound by flat copper wire. When winding, the short side of the flat copper wire is bent to form the inner cavity surface and the outer surface of the coil, and the long side of the flat copper wire is the overlapping surface of each turn of the coil. In order to meet the needs of the shape of the iron core, the edgewise coil is usually a rectangular coil, that is, the shape of the inner cavity of the coil is rect...

AI Technical Summary

Problems solved by technology

Although it is possible to use manual grinding to remove the thickened part after the coil is wound and shaped, since the coil is already in a multi-turn state, manual grinding is difficult and inefficient, which not only consumes a lot of manpower and time, but also The effect is not good

However, if the thickening problem is not handled properly, it will cause the entire coil height direction (due to the superimposition of the thickness of each turn) to be too large and not meet the product design requirements, and it will cause a short circuit between the turns of the coil and burn the motor. Therefore, a great security risk

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