Let Me Tell You About The Manufacturing Technology Of The Transformer

(1) Core manufacturing technology

Enterprises mainly improve the production technology of iron cores by improving their own shearing equipment. The current iron core manufacturing technology has the following changes: ①The iron core column adopts the embedded yoke process. Compared with the conventional process, it can save a lot of mandrel stacking time and improve the quality of core stacking. This process is suitable for the automatic production of distribution transformer cores. ②The application of multi-stage seam core. In recent years, in order to reduce the no-load loss at the core joints, the traditional single joint has been gradually changed to a multi-stage joint. Transformer companies often adopt partial step joints, which can not only reduce transformer no-load loss by more than 15%, but also reduce noise by 3% to 4%. ③The core piece processing technology. In the early 1970s, all transformer manufacturers in China adopted simple silicon steel sheet slitting lines composed of domestic silicon steel sheet slitting lines and multiple shearing machines. [3]

(2) Winding manufacturing technology

The winding assembly process was manufactured in the 1990s. At present, this process is gradually favored by various transformer manufacturers and can be quickly promoted. [3]

(3) Insulation processing technology

In the 1980s, with the improvement of product voltage level capacity and the increase of test items, insulation processing gradually separated from metal processing. The existing gantry CNC machining center has realized the full automation of insulation processing. [3]

(4) Insulation drying and oil treatment technology

Oil-immersed transformers use oil-paper insulation structure. The core process is the drying treatment of insulating materials and the vacuum dehydration of transformers. Gas phase drying: In the mid-1980s, the Chinese transformer factory took the lead in introducing gas phase drying equipment from Switzerland. In recent years, a new built-in kerosene evaporator has been developed. Compared with the traditional external evaporator, both have their own advantages and disadvantages. Transformer oil treatment: In the 1980s, with the introduction of advanced oil filtration equipment from Europe and the United States, China's oil purification technology has made considerable progress. Most of the enterprises have adopted the advanced vacuum spray oil purification method, which has obvious effects of removing impurities and dehydrating. [3]

(5) Energy-saving technology

In terms of the development history of transformer energy-saving technology, transformers have undergone several series of substitution processes such as S6, S7, S9 and S11. At present, S9 energy-saving products have become the mainstream of the market, while the market scale of S11 energy-saving products is growing. In the process of promoting S11, the selling price of S11 is 14.2% higher than that of S9 on average, so price is still the main factor affecting the popularization of S11 transformers. At present, although the new S9 products have occupied most of the market, with the development of the economy, users (especially rural power grids, users with low transformer load rates) for S11 products have gradually increased their demand. The S11 laminated core transformer is designed and developed on the basis of the mature technology of the new S9. Under the premise of maintaining product reliability, its performance indicators have been greatly improved. Compared with the traditional laminated transformer, the S11 wound core distribution transformer has the characteristics of saving raw materials, energy saving, improving power supply quality, low noise and high degree of mechanization.