Solar thermal power high-temperature long shaft molten salt pump

Abstract

The invention discloses a solar thermal power high-temperature long shaft molten salt pump. The solar thermal power high-temperature long shaft molten salt pump comprises a pump shaft, a hydraulic part, a supporting vibration reduction structure, a fluid seal structure and a bearing cooling device are sequentially arranged on the pump shaft from bottom to top, a suction segment is arranged at the front end of the hydraulic part, a blade grid type filter is arranged on the front end of the suction segment, a tail stage flow guide shell is arranged at the tail end of the hydraulic part, the tail end of the tail stage flow guide shell and the front end of a supporting pipe of the supporting vibration reduction structure are fixedly connected, and the tail end of the supporting pipe of the supporting vibration reduction structure is fixedly connected with the bottom of the outlet segment of the fluid seal structure through a flange plate. The solar thermal power high-temperature long shaft molten salt pump is designed to be in the center flow-out manner, thermal expansion uniformity under the high-temperature state can be ensured, through solution schemes of reliable fluid seal design, reasonable cooling structures, flange type expansion joint vibration reduction configuration and the like, safe, reliable and efficient running of the solar thermal power high-temperature long shaft molten salt pump is ensured, and meanwhile, various property indexes are met.

Description

technical field [0001] The invention relates to the field of solar energy industrial equipment, and relates to a high-temperature long-axis molten salt pump for a cold / hot molten salt storage tank system of a solar thermal power station. Background technique [0002] In a thermal island of a solar thermal power station that uses molten salt as heat storage medium or heat transfer medium, the molten salt pump configured with the molten salt storage tank is one of the most critical equipment. The liquid level of molten salt between cold and hot molten salt storage tanks can be alternately changed through the molten salt pump to meet the needs of heat storage or heat transfer. [0003] The technical deficiencies of conventional molten salt pumps: [0004] First: The maximum operating temperature of the tower-type technical route in the power station is 565 ° C, while the operating temperature of conventional molten salt pumps is up to 400 ° C, which are mostly used in melamine...

AI Technical Summary

Problems solved by technology

[0012] According to the above-mentioned technical problems, a high-temperature long-axis molten salt pump for solar thermal power generation is provided to solve the existing molten salt pump technology. The shaft system is too long to cause safety hazards in smooth operation, and the screw sealing effect is insufficient. Molten salt pumps are prone to vibration failures and other shortcomings

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