| 摘要 |
PURPOSE: A turbine main steam valve disk capable of reducing noise and vibration at a valve stem and a cross head is provided to improve the structure of a valve disk, thereby improving velocity distribution, pressure distribution, and turbulent energy in low flow rate and reducing the vibration of the valve disk. CONSTITUTION: A turbine main steam valve disk capable of reducing noise and vibration at a valve stem and a cross head is equipped with a stop valve(101) and a steam outlet(203). Steam supplied from a boiler is supplied through the stop valve. The valve seat(204) of the steam outlet opens and shuts for transporting the supplied steam to a high-pressure turbine(102). The cutting plane(3) of a contact part in which the valve disk(1) contacts to the valve seat are upwardly formed on the curved surface(2) of the valve disk from the lower end of the valve disk. The edge of the cutting plane is rounded for preventing stress concentration.
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