| 摘要 |
PURPOSE:To prevent a lifting pin from being erroneously assembled into the titled valve by a method wherein in the structure of the steam control valve for controling the quantity of steam flowing into a steam turbine, a seat having an inclined surface is inserted into, or formed at, a part of an elliptical spot facing hole provided in a ball bearing insert section of a lever. CONSTITUTION:The seat 16 having inclined surface is inserted into, or molded by casting at, an elliptical hole 9a into which the ball bearing insert section 7 of a lever 9 is inserted. With the above structure, even when a lifting pin 11 is assembled aslant into the ball bearing as it comes into contact with a hole 12a in a lockhead 12, the pin 11 slides on the inclined surface of the seat 16 and is assembled correctly into the ball bearing 17 so that the inaccurate operation of the assembly is prevented and the reliability of the product is improved. |
