Mechanical seal for high temperature hot water pump

Abstract

The mechanical seal device for a high temperature hot water pump comprises a moving ring component, a static ring assembly and a gland. The mechanical seal device is characterized in that an outer stop (31) is arranged on the left end surface of the gland (3), an heat insulation pad (4) and an end cover (5) are arranged on the outer stop (31) on the left end face of the gland (3), and a labyrinthsealing groove (33) is arranged on the shaft hole at the left end of the gland (3) (3) An axial fan (6) is arranged on the outer side, and a heat sink (35) is distributed on the outer surface of the gland (3). The device blocks the heat transfer and heat convection of a pump body, a pumping medium and a sealing cavity medium, and by increasing a heat dissipation area and strengthening a forced airconvection, the temperature of the medium in the sealing chamber can reach the temperature suitable for the stable operation of the mechanical seal. The device is simple in structure, and is convenient in manufacture and use .

Description

technical field [0001] The invention relates to a mechanical sealing device, in particular to a mechanical sealing device for a high temperature hot water pump. Background technique [0002] When the mechanical seal is in operation, the relative sliding between the moving ring and the static ring will generate friction, and the friction end of the moving and static ring is lubricated through the liquid film. Cut the lubricating film with low strength, use it to reduce frictional resistance and reduce material wear. Therefore, whether the mechanical seal can operate normally, the lubricating effect of the liquid film is very critical. [0003] There are many hot water working conditions in the electric power and chemical industries, and the water temperature is 100-180°C. When the water temperature exceeds 80°C, the lubricating performance of its liquid film becomes very poor, which will cause serious wear of the sealing end face. When the temperature of the water is below ...

AI Technical Summary

Problems solved by technology

[0005] The disadvantages of this peripheral cooling heat exchange device are: 1. The structure of the cooling heat exchange device is complex, and the manufacturing cost is high, which is 4-5 times the cost of the mechanical seal itself; 2. Because there are many pipelines, Joints, valves, and many connection points may cause more leakage points, and smaller-diameter pipelines are also prone to fouling and blockage, resulting in poor circulation, affecting the reliability of heat exchange effects, and inconvenient maintenance

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