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    • 6. 发明授权
    • Pneumatic servomotor
    • 气动伺服电机
    • US4566273A
    • 1986-01-28
    • US474285
    • 1983-03-11
    • Markus Baumeler
    • Markus Baumeler
    • F16K31/12F01D17/14F16K31/122F16K31/42F16K47/00F15B11/06
    • F16K31/122F01D17/145F16K47/00F05D2200/221
    • The servomotor is constructed in one embodiment with a partition which forms a constriction through which air is throttled during an emergency closing of the valve. The constriction is formed with a flow resistance equivalent to a free cross-sectional area of not more than 0.02D.sup.2 ; D being the inside diameter of the cylinder. In addition, the chamber defined between the piston and the partition is not more than 10% of the combined volume of this chamber and a pressurized chamber below the partition.In another embodiment, the pressurized chamber may be formed by a pressure tank which is connected via a line which forms a constriction to the chamber below the piston. In still another embodiment, a spherical pressure tank may be secured about a cup-shaped cylinder to form the pressurized chamber while radial grooves in a flange of the cylinder form a constriction with a cover secured to the cylinder and spherical tank.
    • 伺服电动机在一个实施例中被构造成具有形成收缩部的隔板,在阀的紧急关闭期间空气被节流。 收缩部形成有相当于0.02D2以下的自由截面积的流动阻力; D是气缸的内径。 另外,在活塞和分隔件之间限定的腔室不超过该腔室的组合体积的10%以及隔板下方的加压室。 在另一个实施例中,加压室可以由压力罐形成,该压力罐经由形成收缩部的管线连接到活塞下方的室。 在另一个实施例中,球形压力罐可以围绕杯形圆柱体固定以形成加压室,而圆柱形凸缘中的径向槽形成与固定到圆柱体和球形罐的盖的收缩。