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    • 35. 发明授权
    • Butterfly valve
    • 蝶阀
    • US06742496B2
    • 2004-06-01
    • US10301602
    • 2002-11-22
    • Satoshi HattoriKazuhisa Nomura
    • Satoshi HattoriKazuhisa Nomura
    • F02D910
    • F02D9/101F02B27/021F02B27/0242F02B27/0252F02B27/0273F02D9/1015F02D9/1065F16C17/02F16C23/041Y02T10/146
    • The butterfly valve of the invention is provided with a valve shaft to which a valve body is mounted, and a pair of slide bearings which rotatably support both ends of the valve shaft. Inner peripheral surfaces of the slide bearings being in contact with the valve shaft are formed in a convex curved surface protruding to an inner peripheral side, and the inner peripheral surfaces of the slide bearings are formed in a circular arc shape in cross section along an axial direction. The inner peripheral surfaces in the slide bearings in both sides being in contact with the valve shaft are formed in a convex curved shape protruding to the inner peripheral side, and the inner peripheral surfaces of the slide bearings are formed in a circular arc shape in cross section along the axial direction. Accordingly, the inner peripheral surfaces of the bearings are in contact with the outer peripheral surface of the valve shaft in a substantially line contact manner. Therefore, even in the case that the valve holder to which both of the slide bearings are mounted are deformed at a time of being manufactured and a displacement is generated at an axial position of the slide bearings at both ends, it is possible to well fit the valve shaft to both of the slide bearings because the bearings in both ends serve to absorb the displacement in the axis.
    • 本发明的蝶阀具有安装阀体的阀轴和可旋转地支撑阀轴两端的滑动轴承。 与阀轴接触的滑动轴承的内周面形成为向内周侧突出的凸曲面,并且滑动轴承的内周面沿轴向形成为圆弧状 方向。 与阀轴接触的两侧的滑动轴承的内周面形成为向内周侧突出的凸曲面形状,并且滑动轴承的内周面以十字形形成圆弧形状 沿轴向的截面。 因此,轴承的内周面以大致线接触的方式与阀轴的外周面接触。 因此,即使在安装了两个滑动轴承的阀保持器在制造时变形并且在两端的滑动轴承的轴向位置处产生位移的情况下,也可以良好地配合 阀轴到两个滑动轴承,因为两端的轴承用于吸收轴的位移。