The friction between the ropes and the sheave grooves, which are cut on the pulley, initiates the traction force between the traction drive and the rope. The traction drive is the method of converting the input mechanical power in this case the turning of a shaft into useable mechanical power in the system the vertical movement of the elevator.
![elevator mechanical design janovsky elevator mechanical design janovsky](https://i.ytimg.com/vi/ztdssTGFRv8/mqdefault.jpg)
The traction drive is attached to a stationary pulley.
ELEVATOR MECHANICAL DESIGN JANOVSKY FREE
Elevator Ventilationīoth the elevator car and the counter weight are attached to free moving pulleys. In one possible arrangement, such as shown in Figure 2, both ends of the elevator rope are anchored to the overhead beam. There are many different kinds of arrangements that can be used. This weight limit must be large enough to handle daily usage. Possible restrictions on the weight carried within the elevator may be determined from the size of the motor and the other components within the elevator system. It cannot be made too large and, therefore, affect the structure of the building itself. It must be made large enough to deal with the normal daily traffic and to move the necessary objects within the building.
![elevator mechanical design janovsky elevator mechanical design janovsky](https://www.elevatorimagazine.com/wp-content/uploads/2021/05/elevatori-2009-4-pag-68-2-ok.jpg)
The elevator must fit within the given space requirements of the building. If a collection of elevators is used, a complex controller usually controls them. In addition, the elevator must pick up and drop off passengers as efficiently as possible. The brake must also be able to engage in extreme cases in which the elevator cable is broken or other unforeseen circumstances arise.
![elevator mechanical design janovsky elevator mechanical design janovsky](https://img.youtube.com/vi/ztdssTGFRv8/hqdefault.jpg)
The brake of the elevator must be designed in order to guarantee safety during normal day use. In order to do this, the elevetor turns electrical power into mechanical rotational power.