| 摘要 |
PROBLEM TO BE SOLVED: To provide a valve drive assembly for adjusting a fluid flow, and to provide an improved rod support structure.SOLUTION: This invention is related to a valve drive assembly for a valve unit including a penetration part of an operating rod 3 penetrated into a flange 4 to adjust a fluid flow, especially a configuration of the operating rod 3 to the flange 4 for adjusting a predetermined fluid flow. The assembly includes the flange 4, the operating rod 3 and an annular element (bush) 8. The operating rod 3 is arranged through the flange 4, the annular element (bush) 8 is arranged between the flange 4 and the operating rod 3 and an annular gap dimension h is formed between the annular element (bush) 8 and the operating rod 3. An effective length of an annular gap exceeds the thickness of the flange 4. Since the annular element (bush) 8 can be simply manufactured by using a manufacturing process based on mass production such as deep drawing or punching, remarkable cost reduction is brought about. |
