Elevatori Magazine 4 2022

can be calculated as follows (and is central to
the weightless weight testing methodology that
is discussed later in this section: by finding the
no load power drawn by the escalator, it then
becomes possible to find the frictional torque in
the escalator):
kW può essere calcolata come segue (e costituisce
un elemento centrale della metodologia di prova
di carico in assenza di peso presentata nel seguito
di questo paragrafo: determinando il consumo
energetico della scala mobile a carico zero, è
possibile calcolare la coppia di attrito della stessa):
Where:
• P NL
is the power drawn by the escalator at
rated speed and no load in kW
• r is the escalator rise in m
A previous paper [7] presented a measurementbased-model
that allows the prediction of the
stopping distance of an escalator under loaded
conditions in order to obviate the need for
the full load weight testing. Such a model will
enhance the level of safety in escalators and
allow a more scientific approach to the subject of
weight testing and proofing of the brakes.
If the relationship between the steady-state
speed, deceleration, and stopping distance is
clarified under the regulatory standards, physical
information that leads to the status of accident
countermeasures can be obtained. •
End of Part 1 (to be continued)
Dove:
• P NL
è il consumo energetico in kW della scala
mobile alla velocità nominale e a carico zero
• r è il dislivello della scala mobile in m
In un articolo precedente [7] è stato presentato un
modello basato su misurazioni che permette di
prevedere la distanza di arresto di una scala mobile
in presenza di carico per ovviare alla necessità di
condurre una prova di carico a pieno carico. Un tale
modello incrementa il livello di sicurezza delle scale
mobili e consente un approccio più scientifico al
tema della prova di carico e del collaudo dei freni.
Se il rapporto tra velocità di regime, decelerazione
e distanza di arresto viene stabilito in base agli
standard normativi, è possibile ottenere dati fisici
per determinare lo stato delle contromisure agli
incidenti. •
Fine Parte 1 (continua)
Traduzione di Valentina Moretti
References • Riferimenti bibliografici
[1] Al-Sharif L. Escalator Stopping, Braking and
Passenger Falls. Lift Report, 1996. November/
December 1996.
[2] Ferrario M and Hubbard A. Investigation into
the Causes of Passenger Accidents on Escalators:
Management Report. Human Reliability
Associates, reference R93/06, May 1993.
[3] Ferrario M and Hubbard A. Investigation into
the Causes of Passenger Accidents on Escalators:
Technical Report 3: Behavioural Analysis. Human
Reliability Associates, reference R93/06, May 1993.
[4] Stein W et al. Brakes for Escalators & Moving
Walks. Lift Report 2003; 29(1).
[5] Al-Sharif L, Seaborne K, Austin D. Electrical based
intelligent escalator braking systems. Proceedings
of Elevcon 2010, the 18th International Congress
on Vertical Transportation Technologies, Lucerne,
Switzerland, 2nd to 4th June 2010.
[6] Al-Sharif L. Experimental Investigation into the
Effect of Mechanical Design of an Escalator and
Passenger Loading on its Energy Consumption.
The World Congress on Engineering, London, UK
2008; 2: 1542-1547.
[7] Al-Sharif L. Escalator Brake Testing without the
Use of Weights. Lift Report, 2017; 43(4): 38-44.
[1] L. Al-Sharif, Escalator Stopping, Braking and
Passenger Falls, Lift Report, novembre/dicembre
1996.
[2] M. Ferrario e A. Hubbard, Investigation into the
Causes of Passenger Accidents on Escalators:
Management Report, Human Reliability
Associates, rif. R93/06, maggio 1993.
[3] M. Ferrario e A. Hubbard, Investigation into the
Causes of Passenger Accidents on Escalators:
Technical Report 3: Behavioural Analysis, Human
Reliability Associates, rif. R93/06, maggio 1993.
[4] W. Stein et al., Brakes for Escalators & Moving
Walks, Lift Report, 2003; 29(1).
[5] L. Al-Sharif, K. Seaborne, D. Austin, Electrical
based intelligent escalator braking systems, atti di
Elevcon 2010, 18° Congresso internazionale sulle
tecnologie di trasporto verticale, Lucerna, Svizzera,
2-4 giugno 2010.
[6] L. Al-Sharif, Experimental Investigation into the
Effect of Mechanical Design of an Escalator and
Passenger Loading on its Energy Consumption,
Congresso mondiale di ingegneria, Londra, Regno
Unito, 2008; 2: 1542-1547.
[7] L. Al-Sharif, Escalator Brake Testing without the Use
of Weights, Lift Report, 2017; 43(4): 38-44.
BIOGRAPHICAL REFERENCES
Read the biographical details of the
author by framing the QR Code or at
the link: www.elevatorimagazine.
com/en/lutfi-al-sharif/
RIFERIMENTI BIOGRAFICI
Leggi la biografia dell’autore
inquadrando il QR Code o al seguente
link: www.elevatorimagazine.com/
lutfi-al-sharif/
Article taken from the 12 th Symposium on Lift and Escalator Technologies,
Northampton, United Kingdom (22 - 23 September 2021).
Articolo tratto dagli Atti del 12° Symposium on Lift and Escalator
Technologies, Northampton, Regno Unito (22 - 23 settembre 2021).
2022 JULY | AUGUST • LUGLIO | AGOSTO 2022
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