Electric Protection System Energize-To-Run For Generator Set, Industrial and Marine Diesel Engines Caterpillar


Magnetic Pickup Test

Usage:

3304 10E



图 1g00564355

7W-2743 电子转速开关(ESS)

(1) 超速确认按钮

(2) 复位按钮

(3) 超速指示灯

(4) 密封螺塞以调整发动机转速

(5) 密封螺塞以调整盘机终止转速

(6) 密封螺塞以调整机油步位压力转速设定值

磁电速度传感器测试程序将确定磁电速度传感器的操作是否正确。

  1. 6V-7070 数字万用表 连接至 "COM" 端子和 "SIG" 端子。 端子为 ESS 的(ESS-3)和(ESS-4)。 将仪表压力量程设置为大于 1.5 VAC。 起动发动机。 使发动机以低怠速或 600 rpm 的转速运转。 选择较大的转速。

    如果测量的电压为 1.5 VAC 或更多,磁电速度传感器操作正确。 如果电压低于 1.5 VAC,执行步骤 2。

  1. 停止发动机。 在插头接头处断开磁电速度传感器的配线。 将电压表连接至磁电速度传感器的接头接线端。 起动发动机。 使发动机以低怠速或 600 rpm 的转速运转。 选择较大的转速。

    如果测量的电压为 1.5 VAC 或更多,修理磁电速度传感器和 ESS 之间的配线。 如果电压低于 1.5 VAC,执行步骤 3。




    图 2g00564913

    磁电转速传感器

    (1) 间隙

    (2) 磁电速度传感器

    (3) 接头导线

    (4) 锁紧螺母

    (5) 飞轮壳体

    (6) 齿圈

  1. 松开锁紧螺母 (4) 并沿逆时针方向转动磁电速度传感器 (2) ,以便从飞轮壳体 (5) 中拆下磁电速度传感器 (2) 。 转动飞轮直到齿圈 (6) 的齿轮齿直接位于磁电速度传感器 (2) 的螺纹孔中心。 将磁电速度传感器 (2) 安装在飞轮壳体 (5) 中。

  1. 沿顺时针方向转动磁电速度传感器 (2) ,直到磁电速度传感器 (2) 末端轻触齿轮齿。 沿逆时针方向转动磁电速度传感器一圈半,以设置正确的间隙 (1) 。 拧紧锁紧螺母 (4) 至 45 ± 7 N·m (33 ± 5 lb ft) 的扭矩。

    注: 拧紧锁紧螺母时不要让磁电速度传感器转动。

  1. 重复步骤 2。 如果电压仍低于 1.5 VAC,更换磁电速度传感器。

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