Wedge groove curvature sealing structure for dynamic and static gaps for nuclear main pump
A technology of sealing structure and nuclear main pump, which is applied to parts, pumps, pump elements, etc. of pumping devices for elastic fluids, can solve the problems of reducing flow resistance, reduce leakage flow, increase force, The effect of extending the maintenance cycle
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[0027] The following describes the application in detail by taking the nuclear main pump as an example in conjunction with the technical solution.
[0028] The seal of this application is composed of two semicircular seal rings, which can be installed in the dynamic and static gap between the impeller outlet and the guide vane of the nuclear main pump, the dynamic and static gap between the impeller inlet wheel cover and the inlet guide pipe, or installed between the heat shield and the rotating shaft gap. The back arc of the seal ring is installed along the groove of the fixed part, and the arc direction of the seal groove is opposite to the rotation direction of the rotor. The sealing structure of this application is mainly composed of a sealing dam, a sealing boss and a sealing ring.
[0029] Multiple sealing grooves can be set in the circumferential direction of the inner ring of the sealing ring, figure 1 As shown, seal grooves are set every 5°.
[0030] Due to the vis...
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