High-temperature shielded molten salt pump supported by magnetic levitation bearings

Abstract

The invention relates to a high-temperature shielded molten salt pump supported by magnetic levitation bearings. The high-temperature shielded molten salt pump comprises a rotating assembly with a main shaft, a bearing cylinder, a connecting cylinder, an annular pump body, a first cover plate, a magnetic levitation bearing set, a shielding motor and a shielding plug, wherein the bearing cylinder, the connecting cylinder and the annular pump body are sequentially arranged from top to bottom; the main shaft penetrates through the connecting cylinder and extends into the bearing cylinder and the annular pump body; the first cover plate is hermetically connected to the top of the bearing cylinder; the magnetic levitation bearing set is arranged in the bearing cylinder and comprises an upper radial magnetic levitation bearing, an axial thrust magnetic levitation bearing and a lower radial magnetic levitation bearing; the shielding motor is arranged between the axial thrust magnetic levitation bearing and the lower radial magnetic levitation bearing; and the shielding plug is arranged in the connecting cylinder. The molten salt pump is compact in overall structure and stable in operation, meanwhile, the effect of complete isolation of internal and external atmosphere environments can be achieved, and the molten salt pump is convenient and efficient to maintain.

Description

technical field [0001] The invention relates to the field of molten salt pumps, in particular to a high-temperature shielded molten salt pump supported by magnetic suspension bearings. Background technique [0002] The high temperature molten salt pump is the heat transfer medium driven equipment in the molten salt reactor or molten salt heat storage project, which is used to overcome the system resistance of the circuit and is the heart of the circuit system. At present, the high-temperature molten salt pumps commonly used in molten salt reactors or molten salt heat storage projects are vertical submerged pumps driven by independent motors. But this molten salt pump has many disadvantages: First, it uses a coupling to connect with an independent motor, making the overall structure longer. Second, the independent motor and pump body have their own bearings, which will generate more noise and cause greater vibration, resulting in unstable operation. Moreover, the bearings n...

AI Technical Summary

Problems solved by technology

But this kind of molten salt pump has many disadvantages: First, it uses a coupling to connect with an independent motor, making the overall structure longer

Second, the independent motor and pump body have their own bearings, which will generate more noise and cause greater vibration, resulting in unstable operation

Moreover, the bearings need auxiliary measures such as oil cooling, and more bearings will make the maintenance of the overall structure complicated

Third, the sealing performance is poor, and the atmosphere inside and outside the pump cannot be completely isolated. At the same time, an additional dynamic sealing structure is required for sealing.

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