Manufacturing and testing process of piston ring of nuclear main pump in nuclear power plant

Abstract

The invention relates to a manufacturing and testing process for a nuclear main pump piston ring of a nuclear power plant. The shapes of the first pre-processed piston ring (1) and the second pre-processed piston ring (2) are respectively machined on the forging blank, and the shapes of the first pre-processed piston ring (2) are left for cutting The margin, the clamping position (3) is reserved on the forging blank; stress relief annealing: the first pre-processed piston ring (1) is placed in the furnace at room temperature, the second heating rate is less than 50 ° C per hour, and the temperature is raised to 610 ° C ± 20 ° C and kept For two hours, the third cooling rate is less than 50°C per hour. The invention includes the processing, manufacturing and testing process of the piston ring. Through the lathe processing and milling process of the forging material, the detection tool is used to detect whether the processed product meets the design requirements of the actual state, saving the traditional lathe process and grinding process. It reduces manufacturing cost and improves production efficiency, and has been widely used in the nuclear main pump of Hualong No. 1 nuclear power plant.

Description

Technical field: [0001] The invention relates to a manufacturing and testing process of a nuclear main pump piston ring of a nuclear power plant. Background technique: [0002] The nuclear main pump piston ring of a nuclear power plant is a key component of the shaft seal main pump. The manufacturing and testing process of the nuclear main pump piston ring of a nuclear power plant is particularly important for the normal operation of the shaft seal nuclear main pump and the localization of the main pump manufacturing technology. The traditional process is to complete the turning sequence and milling interface of the piston ring, and then connect the interface to form an ellipse, which needs to be riveted, and then turn the ellipse into a circle by turning and grinding. Clamping and grinding are relatively difficult, and the processing process is relatively cumbersome, reducing processing efficiency, wasting costs, and low yield. Invention content: [0003] The purpose of ...

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