Forced-directed oil cooling coil configuration

Abstract

The invention relates to a forced directional oil cooling coil structure, belonging to the transformer technical field, which comprises a loop coil, a tensioning frame, an inner oil baffle, an outer oil baffle, two first insulation blocks, a loop coil end insulation structure and an oil barrier on an outgoing line; wherein, the tensioning frame is arranged inside the loop coil; the inner oil baffle and the outer oil baffle are respectively arranged on the internal side and the external side of the loop oil; a paperboard is arranged between the tensioning frame and the inner oil baffle; the oil barrier is arranged on the outgoing line of the lower end of the loop oil; the first insulation blocks are respectively arranged on the upper end and the lower end of the loop coil; the loop coil end insulation structure is arranged on the lower part of the first insulation block on the lower end of the loop oil. The oil quantities of the three oil inlets on the loop coil end of the transformer applying the invention are 27.7%, 33.3% and 39%; the oil quantities are similar, which can cool the coil effectively and improve the product performance of safe and reliable operation.

Description

technical field [0001] The invention belongs to the technical field of transformers, in particular to a coil structure for strong oil-guided cooling. It can be applied to high-voltage, ultra-high-voltage large-capacity AC and DC transformers and reactor products. Background technique [0002] In the existing coil structure, due to poor heat dissipation conditions, the inner and outer longitudinal oil gaps of the inner coil are small, and the outer longitudinal oil gap of the outer coil is much larger than the inner longitudinal oil gap, so the oil flow through the inner coil is insufficient. The oil flow through the outer coil is excessive, resulting in a mismatch of oil flow between the coils, resulting in a lower temperature rise of the outer coil and a higher temperature rise of the inner coil, which in turn increases the unevenness of the oil flow distribution and increases the oil flow rate. If the temperature is reduced, the cooling conditions will become worse, so th...

AI Technical Summary

Problems solved by technology

However, with the development of power engineering, the application of AC and DC transformers and reactor products is also developing in the direction of high voltage and large capacity, and the loss and geometric size of the coil are also increasing. Only by changing the coil and paper The gap between the barrels can no longer make the oil flow inside the coil evenly distributed, and it can't achieve a good cooling effect, so it can't meet the needs of product development.

Images