Open AccessINFLUENCE OF MANUFACTURING AND ASSEMBLY TOLERANCES IN CIRCULAR AND PULSE-FREE GUIDES GEOMETRIES OF ESCALATORS
Author(s) -
José María Cabanellas Becerra,
Juan David Cano-Moreno
Publication year - 2021
Publication title -
dyna
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.177
H-Index - 11
eISSN - 1989-1490
pISSN - 0012-7361
DOI - 10.6036/9676
Subject(s) - kinematics , pulse (music) , path (computing) , work (physics) , mechanical engineering , structural engineering , engineering , computer science , physics , telecommunications , classical mechanics , detector , programming language
Escalators and moving walkways sector have maintained the basic mechanical design for more than a century. The permeability from new patented designs is negligible. This paper presents the first published work in the literature about polygonization problem, oscillatory pulsating movement, in escalators, which occurs when roller chains pass through curved geometries. Conventional geometries (circular curved rails) and pulse-free designed geometries have been analyzed. Pulse-free geometries present a better kinematic behavior than circular paths, which increases passenger comfort, improves mechanical behavior and lowers maintenance costs. The results show that errors, produced by manufacturing and assembly tolerances, in the theoretical path up to 2mm, are admissible. Therefore, pulse-free guides present a robust kinematic behavior and will improve escalator passenger comfort and allowing to save manufacturing and maintenance costs.Keywords: polygonization effect, pulse-free guides, escalator, roller chains