Disintegration of all parts of the speed control system

The engine block is made up of a number of opposing single-cylinders. According to the function and structural characteristics, we divide the single-cylinder of the engine into the characteristic levels shown, and the model of the whole body passes through these independent features. Boolean operations are combined. When finite element analysis is performed using feature-based solid models, the simplified geometric model can be obtained by closing some features. Due to the on-site conditions and maintenance schedule, the maintenance focuses on eliminating the axial movement of the synchronizer drive shaft and improving the performance of the governor's mis-throttle. All components of the speed control system were disassembled and cleaned, and the distribution slide valve with rust spots was replaced. The tightening force of the threaded sleeve bearing and the threaded sleeve was adjusted to reduce the axial sway of the synchronizer drive shaft to 0.01 to 0.02 mm. about.

The governor error throttle assembly has been simply repaired and processed. Although it has not yet reached the ideal requirements, the improvement of working performance provides a good condition for the coordinated operation of the unit. After the modification of the synchronizer algorithm, the operation coordination is carried out again. In the test, when the unit load is above 170MW, the coordinated control system realizes stable operation, and the control indexes such as unit load and main steam parameters reach the predetermined requirements. Due to the static characteristics of the high-pressure steam distribution mechanism at the opening of the main valve disc of No. 3 high-pressure regulating valve, the control accuracy of the unit near 160MW is poor. When designing products or improving product design, we must consider whether there are duplicate quality varieties in the product structure, whether there are contradictory products sold in the market, and the introduction of new products replaces old products in whole or in part, when new and old products exist in the market at the same time. When, how to give customers a reasonable explanation.

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