Sealing structure for high-pressure seamless attach in nuclear main pump sartor shielding sleeve

Abstract

The invention provides a sealing structure for high-pressure seamless attachment in a nuclear main pump sartor shielding sleeve, and belongs to the nuclear electrical field. The sealing structure is mainly used for sealing of the high-pressure seamless attachment in the nuclear main pump sartor shielding sleeve and comprises an upper end sealing structure and a lower end sealing structure, wherein the lower end sealing structure is a fixing sealing end, the outer diameter of a lower inner supporting guiding ring is slightly smaller than the inner diameter of the sartor shielding sleeve, the thickness of a lower sealing ring is larger than that of the gap between the outer wall of the shielding sleeve and the inner wall of the lower inner supporting guiding ring, a pressing ring presses the lower sealing ring into the gap, and the gap between the inner wall of the shielding sleeve and the outer wall of the lower inner supporting guiding ring is eliminated by means of deformation and expansion of the lower sealing ring caused by stress, so that the shielding sleeve can be tightly attached to the outer surface of the lower inner supporting guiding ring. The sealing structure for the high-pressure seamless attachment in the nuclear main pump sartor shielding sleeve lowers the requirement on the size accuracy for welding the shielding sleeve, and is capable of achieving axial feed supplement of the shielding sleeve and controlling the attachment thickness. The sealing condition can be observed in the assembly process, the structure is simple, the implement is convenient, and the sealing is reliable.

Description

technical field [0001] The invention relates to a sealing structure for high-pressure non-gap plastic deformation and precision assembly attachment of a stator shielding sleeve of a nuclear main pump motor, which is mainly used for assembly and sealing of the stator shielding sleeve of a nuclear main pump and belongs to the field of nuclear power. Background technique [0002] The nuclear main pump in the nuclear power equipment is the "heart" of the nuclear power plant. The third-generation passive nuclear reactor uses a shielded pump with a shielded motor. The stator shielding sleeve attached to the inner surface of the stator of the nuclear main pump shielded motor is used to prevent the transported liquid medium from corroding the stator core and stator windings. [0003] The stator shield sleeve of the nuclear main pump is a thin-walled cylinder processed by the abrasion-resistant non-magnetic metal Hastelloy C-276 through shearing, rolling bending, welding, bulging and...

AI Technical Summary

Problems solved by technology

One is to assemble the sealing ring and the inner support first, and then rely on external force to insert the stator shielding sleeve between the sealing ring and the inner supporting ring. Since the shielding sleeve is very thin and long, it is easy to cause the fold failure of the shielding sleeve, so it is not ideal. Effect

Another way is to assemble the stator shielding sleeve with the inner support, and then squeeze the sealing ring from the end directly between the inner wall of the outer support and the outer wall of the stator shielding sleeve, which may also cause the shielding sleeve to be squeezed out and wrinkled to cause failure

Images