Vertical face sealing strips for guide vanes of water turbine

Abstract

The invention relates to vertical face sealing strips for movable guide vanes of a water turbine, which comprise sealing strip bodies of which the cross sections are in a shape of an isosceles trapezoid with a circular arc on the upper part. The sealing strips are characterized in that each integral sealing strip body consists of a left sealing strip and a right sealing strip, and have the advantages that the sealing strips are improved according to the water wheel guide vanes of operated power stations and are prevented from being torn and falling off by using a non-pressure plate structure with washing resistance, gas etching material resistance and convenient overhauling and replacement; the periphery and upper and lower joints of the sealing strips are insusceptible to water seepage; the sealing strips are convenient to install due to loose manufacturing; and soft adhesive glue is adopted to perform filling and cementation, so that the installation problem of the last sealing strip of each guide vane is solved.

Description

technical field [0001] The invention belongs to water turbines, and in particular relates to a water turbine movable guide vane facade sealing strip for the sealing structure transformation of a power station that has been put into operation. Background technique [0002] The guide vane of the water guide mechanism of the turbine rotates around its own axis between the top cover and the bottom ring to achieve the purpose of adjusting the flow into the turbine according to the change of working conditions. Therefore, in order to make the guide vane rotate flexibly between the top cover and the bottom ring, there is inevitably a gap between the end face and the vertical face, and the existence of this gap has a great influence on the start-up and shutdown of the unit. During the operation of the unit, the brake system is used to stop the machine. After the brake is released, the unit rotates slowly due to the water leakage of the guide vane, which directly affects the safe ope...

AI Technical Summary

Problems solved by technology

However, this structure can only be used if it is prefabricated when the new unit is designed

For the hydraulic turbine water guide mechanism with hollow sealing strip structure in the power station that has been put into operation, when the sealing strip is to be replaced, the water guiding mechanism must be completely removed, the trapezoidal groove must be reprocessed, and the sealing structure can only be used in the form of a pressure plate. It is extremely difficult to transform the water wheel guide vane of the structure

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