The first large-scale hydro-generator unit in Guangxi has been successfully upgraded
There are two differences between the arc gates of the gauge. 1 is the hinge is welded by 20310570 castings and 161 fork-shaped structural parts, structure 2.
Since the casting has a high carbon content and a carbon equivalent of more than 0.45, the weldability is poor, and preheating welding is required, and the welding should be kept warm and slow to prevent cracking. 2 is the joint hinge for the introduction of the joint bearing, the hinge shaft and the joint bearing transition fit, the assembly precision is higher than the normal bearing, and the difficulty is large. Therefore, we must attach great importance to the quality of assembly. Special assurance measures must be developed that meet the above two process characteristics.
Due to the above various measures, the quality management has been significantly improved, and feasible management measures have been provided for the future progress of quality management.
The first large-scale hydro-generator unit in Guangxi, the capacity transformation was successful. The first large-scale hydro-generator unit in Guangxi was upgraded. The capacity expansion of No. 2 unit of Guangxi Dahua Hydropower Plant was successful. The project was invested by Guangxi Guiguan Electric Power Co., Ltd. The construction shall be undertaken by the Guangxi Hydropower Engineering Bureau Power Installation Company. After the unit was shut down on October 5, 1998, it was handed over to the Guangxi Hydropower Engineering Bureau Power Installation Company to carry out the construction of the renovation project. At 7:00 on May 19, 1999, the static commissioning was completed. On May 19, 1999, from 8:00 to 15:00, the system was inspected. The unit was filled with water. The unit started the test at 1600 pm on the 19th to 22:00 on the 23rd. At 22:53 on the 23rd, the crew started the test for 72 hours. May 1999 At 23:53 on the 26th, the operation of the system was completed at the end of the 72-hour trial run. The single unit capacity of the Dahua Power Plant was increased from the original 100MW to 4MW after the transformation of the whole unit technical transformation work. The main transformation project was the transformation of the generator stator for the unit runner. Excitation system transformation computer monitoring system transformation export busbar transformation main transformer cooler transformation.
The modified Unit 2 is currently in good operating condition.
Formulated a special process, Zeng Binghua, power installation company of Guangxi Hydropower Engineering Bureau
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