There are two differences in the arc of the rules. 1 is the hinge of the 20310570 casting and 161 fork-shaped structure of the butt welded body, structure 2.
Due to the high carbon content of the castings and the carbon equivalent of more than 0.45, the weldability is poor and preheat welding is required. After welding, it should be insulated and slowly cooled to prevent cracks. 2 is the introduction of joint bearing for the hinge system, the hinge shaft and the joint bearing transition coordination, assembly accuracy is higher than the general bearing, more difficult. Therefore, we must attach great importance to the quality of assembly. It is necessary to formulate special assurance measures that meet the above two process characteristics.
As a result of adopting the above various measures and increasing the apparent improvement in quality management, it also provides feasible management measures for the future improvement of quality management.
Guangxi's first large-scale hydro-generator unit, capacity reform succeeded Guangxi's first large-scale hydro-generator unit capacity increase transformation Guangxi Dahua Hydropower Plant Unit 2 capacity expansion reform succeeded, this project was invested by Guangxi Guiguan Electric Power Co., Ltd. The construction was undertaken by the Power Installation Company of Guangxi Hydropower Engineering Bureau. After the unit was shut down on October 5, 1998, it was submitted to the Guangxi Hydropower Engineering Bureau Power Installation Company for construction of the retrofit project. At 7:00 on May 19, 1999, the static commissioning was completed. On May 19, 1999, from 8 to 15 o'clock, the system was inspected and the crew was filled with water. The unit started the test on the 19th from 16 o'clock on the 19th to 22 o'clock on the 23rd, and started the 72-hour trial run at 22:53 on the 23rd, May 1999. On the 26th, 23:53:72, on the 26th, the trial operation was completed and the operation of the delivery system was completed. After the transformation of the entire unit, the single-unit capacity of the Dahua Power Plant was increased from the original 100 MW to 4 MW, and the main transformation project was the modification of the generator runner and the stator of the generator. Excitation system transformation computer monitoring system transformation transformation of export bus transformation transformation of the main transformer and so on.
The modified Unit 2 is currently in good condition.
Formulate Special Process Zeng Bihua, Power Installation Company of Guangxi Hydropower Engineering Bureau
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