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77-30569/234034 Longevity of block and tackle elevator system
Engineering Education # 11, November 2011
The article considers reasons of failures of the block and tackle elevator system and factors which influence its longevity. The authors review the procedure of parameter determination of the block and tackle elevator system by analyzing the results of multivariant calculations. The authors give recommendations regarding processing of the data obtained during the calculation. They justify the choice of the contact pressure value as the standard of longevity of the block and tackle elevator system.  The authors examine the contact pressure calculation in the stream which differs from the traditional one by separate examination of the diameters of the rope-guiding pulley and rope, and also of the profile of the stream of the rope-guiding pulley.
 
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