Method for Eliminating Cavitation and Vibration Damage of Arc Gate Bottom Water Seal and Connecting Parts

Abstract

The invention provides a method for eliminating cavitation erosion and vibration damage of a bottom water seal and a connecting piece of a radial gate. The method aims at solving the problem of damage of a bottom water seal and a connecting bolt of a built radial gate in water-power engineering under the conditions of the high water head and unfavorable drainage. In particular, the method includes the following steps that (1) a hydraulic test model is designed and manufactured; (2) test working conditions are determined, wherein according to the different upstream incoming flow conditions, in cooperation with upstream and downstream water levels, the different test working conditions are determined for conducting drainage hole hydraulics model testing on the model; (3) parameter measuring points are distributed; (4) unfavorable working condition zones are determined according to parameters measured at all parameter measuring points under all working conditions; (5) baffle sills are distributed at negative pressure zones with unfavorable working conditions; (6) the bolt connecting manner of a bottom water seal pressing plate and a base plate is improved; and (7) effect testing is carried out, wherein detecting and further optimizing are carried out on the model, the baffle sills are arranged on an actual prototype on the basis, and the bolt connecting manner is improved.

Description

technical field [0001] The invention relates to a method for eliminating cavitation and vibration damage of arc gate bottom water seals and connecting parts. technical background [0002] As the main water seal, the pressurized telescopic water seal is widely used in high-head scupper holes of water conservancy projects. However, if there is a slight carelessness in design, construction and operation, problems will occur. During the opening and closing process of the arc-shaped working gate, it is affected by high-speed water flow, and the water stop and connecting parts are loose and damaged, resulting in the gate not being closed tightly and causing water leakage. The cutting, cavitation and flow-induced vibration will cause cavitation damage and harmful vibration in severe cases, making the gate unable to work normally. At the same time, sudden expansion and cavitation damage near the Kanmen trough also occur from time to time. However, it is rare for the water stop pla...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a method for eliminating the cavitation and vibration damage of the bottom water seal of the arc gate and the connecting parts, so as to solve the problem of the bottom of the arc gate in the hydropower project as described above under high water head and unfavorable discharge conditions. Destruction of water seal and connecting bolts

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