Three Driving Modes Of Machine Room-Less Elevator


    The development of various new driving methods is a […]

    The development of various new driving methods is an important development direction for machine room-less elevators. The new driving methods that have been developed mainly include linear motor directly driving the car or counterweight, friction transmission mechanism directly driving the car, and wire belt traction driving the car and counterweight. Their common idea is to deal with the problem of hoistway layout by compressing the size of the drive host or simplifying the transmission mechanism. But there are also differences in these driving methods.

    The major improvement of the traction drive of the steel wire belt is to use the flat steel wire belt instead of the circular steel wire rope, which greatly reduces the diameter of the traction sheave under the condition of the same rope diameter ratio. The torque is further reduced and the rotational speed of the traction sheave is further increased, thus greatly reducing the shape and size of the drive mainframe, so that it can simply be placed between the top car of the hoistway and the hoistway wall.

    The linear motor drive can be driven without counterweight. The permanent magnet is directly installed on the car and the coil is fixed on the hoistway wall on the corresponding side. The linear motor directly drives the car to move up and down. In addition, the coil can be installed on the counterweight and the permanent magnet can be fixed on the hoistway wall on the corresponding side, and the linear motor can be used to indirectly drive the car to move up and down.

    Friction wheel drive is to install the drive host with friction wheel directly on the bottom of the car, so that it contacts with the special car guide rail and applies a certain positive pressure with the help of the pressure wheel so that the friction generated when the friction wheel is rotated by the drive host is driven. force to drive the car up and down along the guide rail.

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