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转动设备测振

2024-03-12

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姚新章

振动一般可以用以下三个单位表示:振幅mm、振动速度(振速)mm/s、振动加速度mm/s2

mm振动位移:一般用于低转速机械的振动评定;mm/s振动速度:一般用于中速转动机械的振动评定;mm/s2振动加速度:一般用于高速转动机械的振动评定。

垂直,轴向,水平三个面对设备进行测振

振幅理解成路程,单位是mm;把振速理解成速度,单位是mm/s;振动加速度理解成运动加速度,单位mm/s2

速度描述的是运动快慢;振速就是振动快慢,一秒内能产生的振幅。

振幅相同的设备,它的振动状态可能不同,所以引入了振速。

位移、速度、加速度都是振动测量的度量参数。就概念而言,位移的测量能够直接反映轴承固定螺栓和其它固定件上的应力状况。

不同转速的转机振动合格标准是什么?

额定转速750r/min的转机轴承振动值不超过0.12mm,额定转速1000r/min的转机轴承振动值不超过0.10mm,额定转速1500r/min的转机轴承振动值不超过0.085mm,额定转速1500r/min以上的转机轴承振动值不超过0.05mm。

窜轴值不超过4mm。

(来源:中天钢铁热电厂)

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