High temperature pump guide-bearing hot air circulation system

Abstract

The invention provides a high temperature pump guide-bearing hot air circulation system. The high temperature pump guide-bearing hot air circulation system mainly comprises several parts of a water inlet section (1), an impeller (2), a flow guiding shell (3), a locking nut (4), a first guide bearing (5), a main shaft (6), a water lifting pipe (7), a hot box (8), a draught fan (9), an overflow pipe(10), a sealing screwing plug (11), a shaft protecting sleeve (12), a draining bending pipe (13), a second guide bearing (14), a pressing cover (15), a labyrinth sealing rotating body (16), a valve (17) and a gas-liquid separation device (18). The hot air system is established through pressurization of the draught fan by using heat of a pump, the guide bearings are washed and protected, the safety margin during running and overhauling of the pump is improved, the phenomenon of medium residue easily occurred in a gap between the guide bearings and a shaft during normal shutdown or shutdown overhauling of the high temperature pump can be well solved, dangers of unsmooth blockage even jamming are avoided, and stability and reliability of a whole machine are greatly improved.

Description

technical field [0001] The invention mainly relates to the field of fluid machinery, in particular to a hot air circulation system for a guide bearing of a high-temperature pump. Background technique [0002] At present, the demand for industrial pumps is increasing, and industrial pump devices are developing towards large-scale (large capacity, high efficiency, reliability, low noise and automation). However, it is difficult to make breakthroughs in the development of large-scale industrial pumps in China. Partially dependent on imports. The development of high-temperature molten salt pumps and high-temperature heavy metal pumps is the development direction of the domestic pump industry in recent years. However, there are still many technical difficulties to be solved urgently for these products. Most of these pumps adopt vertical long-axis pump structures. Most of the pumps Soaked in high-temperature medium, placed in a closed heating storage tank to run, the guide bearin...

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Problems solved by technology

[0003] In order to solve the above-mentioned problems of the existing technical solutions, medium residues tend to occur in the gap between the guide bearing and the shaft when the high-temperature pump is normally shut down or shut down for maintenance. When the pump is raised, due to the temperature drop, molten salts are precipitated and heavy metals change from liquid to solid. It will cause the risk of rotor jamming or even jamming, resulting in equipment damage and other problems

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