795F AC Off-Highway Truck Automatic Lubrication System (For Electric Start Equipped Trucks) Caterpillar


Electrical System

Usage:

795F AC ERM



图 1g01844879

自动润滑系统接线图




图 2g01844917

自动润滑泵

(1) 自动润滑泵马达

(2) 自动润滑电磁阀

(3) 储脂罐

(4) 电动放气阀

自动润滑系统的电气系统由两个主要部件构成。 这两个部件分别为底盘 ECM 和自动润滑电磁阀 (2) 。 底盘 ECM 以规定的时间间隔给自动润滑电磁阀 (2) 加电。 可以将间隔配置为 2 分钟至 120 分钟。 机器启动十分钟后,底盘 ECM 接通自动润滑电磁阀 (2) 。 每隔 60 分钟,底盘 ECM 接通一次电磁阀,电磁阀保持接通,直至自动润滑压力传感器检测到系统压力处于 15850 kPa (2300 psi) 或者直至系统运行 2 分钟。 此过程一直持续,直到机器关闭为止。

底盘 ECM 确定何时开始一个润滑油循环。 当润滑循环开始时,底盘 ECM 给自动润滑继电器加电。 电流供应给自动润滑泵组。 自动润滑电磁阀 (2) 加电。 电动放气阀 (4) 关闭,防止润滑剂流回润滑剂储罐 (3) 。 自动润滑泵马达 (1) 加电。 自动润滑泵开始通过喷油器为轴承分配润滑剂。

当所有轴承都收到润滑剂时,系统中的压力上升至 15850 kPa (2300 psi),使自动润滑压力传感器启动。 当自动润滑压力传感器启动时,底盘 ECM 将自动润滑继电器断电,切断流向自动润滑单元的电流。 自动润滑电磁阀 (2) 断电。 电动放气阀 (4) 打开,让多余的压力和润滑剂流回润滑剂储罐 (3) 。 系统压力放气。 自动润滑压力传感器不再感受高压。 自动润滑泵马达 (1) 断电。 自动润滑泵停机。 底盘 ECM 复位。 底盘 ECM 开始针对下一个润滑循环计时。

注: 如果系统中的压力未在 2 分钟内达到 15850 kPa (2300 psi),则底盘 ECM 将给自动润滑继电器断电,切断送往自动润滑单元的电流。

关于电气系统的信息,请参阅示意图, "电气系统"。

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