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1.2轴向位移、本特利高低压差胀传感器的安装
轴向位移测的是推力轴轴向位移,在机组运行过程中,使动静部件之间保持一定 的轴向间隙,避免汽轮机内部转动部件和静止探头安装在2号轴承处,分别装于甲乙两侧,探头朝向低压缸方向安装探头型号为7200敏度为3.937 V/mm，前置器供电电压为-24V。大轴相对于汽缸的设计零点为止推轴承靠在工作瓦面为大轴零位。在安装轴向位移和低压差胀本特利传感器前,首先要把要求安装。轴向位移的量程范围为-2 mm一+ 2 m V 沾化电厂汽轮机膨胀相对死点在2号轴承处,高压缸转子膨胀在以2号轴承处为相对死点向前箱方向膨胀,低压缸转子膨胀在以2轴承处为相高低压差胀都是朝着发电机方向安装,要使高低缸差胀测量范围均在线形范围之内,按照探头线性中点及量程范围- 2--10 mm定位。探头零位的安装电压可按下式计算:
高压差胀探头零位安装电压:探头线性灵敏度(0.8 V/mm)*4
低压差胀:探头线性中点(0.8 V/mm)*4
所以,高压差胀探头零位安装电压为-11.10 零位安装电压为-3.8V。
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