کلیپ جدید Dover traction elevator machine modernized

Dover traction elevator machine modernized تماشای آنلاین و دانلود با لینک مستقیم برترین کیلیپ ها و فیلم ها
This is a modernized elevator traction machine. It's originally manufactured by Dover. It had a DC motor that was replaced with an AC motor with a shaft driven encoder. A new safety device called a rope gripper is seen mounted to the floor opposite of the motor. This can stop and hold the elevator in case of a minor or major malfunction such as unintended motion and overspeed (in either direction.) It serves as a secondary brake to the main. There's also a brake switch mounted above the brake to monitor br

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