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【CN 201780021293.3 】Annular grille for hydraulic machine and method for closing
[CN 201780021293.3] Annular grille for hydraulic machines and method for closing Title: Annular grille for hydraulic machines and method for closing Application number: CN 201780021293.3 Applicant: Voith Patent Co., Ltd. Application date: 2017-3-28 Patent type: Invention application for an annular grille used to interrupt the water flow through the waterway of a hydraulic machine, the hydraulic machine has an impeller and a spiral pipe, the annular grating comprises a hollow first base body (1) surrounding an impeller shaft, the first base body being designed such that the first base body can be moved from an open position to a closed position and vice versa from the closed position to the open position, wherein, when the first base body (1) is in the closed position, no water flow through the hydraulic machine is achieved, wherein, the annular grating comprises a hollow second base body (2) surrounding the impeller shaft, the second base body being designed such that the second base body can move axially from a first position outside the waterway to a second position inside the waterway and vice versa from a second position inside the waterway to a first position outside the waterway, wherein the second base body (2) has an opening in its wall, water is able to flow through these openings when the second substrate (2) is in the second position and the first substrate (1) is not in the closed position.
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