Rolling process method for nuclear power station nuclear main pump long shaft sleeve

Abstract

The invention relates to a rolling process method for a nuclear power station nuclear main pump long shaft sleeve. According to the rolling process method for the nuclear power station nuclear main pump long shaft sleeve, an inner support (1) and an outer support (2) are installed to an inner hole step (14) of the long shaft sleeve (4) after being assembled together through bolts (3), the inner support (1) is made to slide to the bottom face of the outer support (2) on a contacted inclined plane (13) through clockwise rotation of the bolts (3), the outer support (2) is evenly distributed with12 openings (15) to make the outer support (2) be tightly supported outwards, and the outer support (2) is supported at the inner hole step (14) of the long shaft sleeve (4). By means of the rolling process method for the nuclear power station nuclear main pump long shaft sleeve, the situation that a jacking tip is subjected to force to cause tool core shaft deformation and cause long shaft sleeve(4) deformation can be avoided, three-segment supporting forms powerful supporting on an inner hole of the long shaft sleeve (4), the long shaft sleeve (4) deformation will not be generated in rolling, and generated long shaft sleeve (4) shaking can be effectively avoided.

Description

Technical field: [0001] The invention relates to a rolling process method for a long shaft sleeve of a nuclear main pump of a nuclear power plant. Background technique: [0002] The rolling process of the long shaft sleeve of the nuclear main pump of the nuclear power plant is a key component of the shaft seal main pump of the nuclear power plant. The rolling process method of the long shaft sleeve of the nuclear main pump of the 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 rolling process of the long shaft sleeve of the nuclear main pump of the nuclear power plant has always been a technical problem. The traditional process method is that the fixed end caps at both ends of the long bushing are penetrated into the mandrel and rolled on a horizontal lathe. The defect is that this method will cause deformation of the long bushing. The inner and o...

AI Technical Summary

Problems solved by technology

The traditional process method is that the fixed end caps at both ends of the long bushing are penetrated into the mandrel and rolled on a horizontal lathe. The defect is that this method will cause deformation of the long bushing. The inner and outer circle runout of the long shaft sleeve is 0.02mm, the coaxiality is 0.01mm, and the wall is thin, the thinnest part is only 13mm, and the length is 1100mm. It is easy to deform during the rolling process. The traditional process method adopts horizontal For rolling, it is necessary to use the chuck of the machine tool to clamp one side of the end cover, and the tip is to withstand the mandrel on the other side. It is difficult to control the size of the tip force. Small size will cause the pressure generated during rolling to change the radial position of the long bushing, which cannot guarantee the success of rolling, and the thin-walled long bushing will be deformed under the rolling pressure due to the lack of internal support during rolling. As a result, the workpiece was scrapped, and the manufacturing process of the long shaft sleeve was complicated. In the early stage, only the grinding process required about 15 days to ensure the accuracy of the drawings. In the final rolling sequence, it was often scrapped due to deformation, which brought Cost loss and delay in construction period. If the long shaft sleeve that does not meet the requirements of the drawing is installed in the nuclear main pump, it may cause the long shaft sleeve and the carbon ring of the lower guide bearing to be out of concentricity, so that the carbon ring of the lower guide bearing will be eccentrically worn during operation, and the main pump will vibrate. If it is too large, the carbon ring of the lower guide bearing will be damaged, and more seriously, it will cause a nuclear power plant accident

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