High-temperature melting pump

Abstract

The invention provides a high-temperature melting pump. The high-temperature melting pump comprises a pump body, a heat-insulation layer and a bearing box, wherein the input shaft of the pump body penetrates through the heat-insulation layer and the bearing box to be connected with a power part, a heat-dissipation cavity is formed in the heat-insulation layer, at least two cooling cavities which are not communicated with each other are formed between the heat-dissipation cavity and the bearing box, and forced cyclone devices are arranged in the cooling cavities respectively and used for cooling the bearing box and the heat-insulation layer through external air flow. According to the high-temperature melting pump, the upper cooling cavity and the lower cooling cavity are formed in the lowerside of a bearing body, the lower cavity is communicated with an annular heat-dissipation channel in the upper side of the heat-insulation layer, a pump shaft is cooled two times by using natural airextracted from the outside, and the temperature transmitted to the bearing body of the high-temperature melting pump can be greatly reduced.

Description

technical field [0001] The invention relates to the field of fluid pumps for transporting high-temperature media, in particular to a high-temperature melt pump. Background technique [0002] With the continuous development of nuclear power technology, the research of the fourth generation nuclear power reactor is urgent. As the main pump of the fourth-generation nuclear power plant, the high-temperature melt pump usually transports a medium with a temperature above 500°C, and its operating conditions are extremely harsh. During the operation of the actual unit, the medium conveyed under high temperature conditions makes the various components of the pump in a high temperature state through heat transfer and heat radiation. Bearing components play an indispensable role as a key support mechanism. If the temperature rise of the bearing is too high, the lubrication effect of the bearing will become poor, and the life of the bearing will be greatly shortened. In serious cases,...

AI Technical Summary

Problems solved by technology

Once the insulation layer fails, the temperature of the environment will rise rapidly, and the existing technology that uses the temperature difference of the environment to dissipate heat is likely to fail, and even serious accidents will occur

At the same time, the setting of the minimum water level of the pump plays a decisive role in the pump’s liquid suction performance in actual engineering applications. Once the minimum water level is set unreasonably, harmful vortices will appear at the inlet, and even air intake will occur, which greatly reduces the efficiency of the pump.

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