Traction sheave elevator with drive member slippage control
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United States of America Patent
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Mar 28, 2017
Issued Date -
N/A
app pub date -
Feb 27, 2014
filing date -
Mar 4, 2013
priority date (Note) -
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status (Latency Note)
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Abstract
A traction sheave elevator includes a drive machine having an output shaft which is connected to the traction sheave via an endless drive member. An encoder is provided in connection with the traction sheave, and a motor speed detection device is provided. A monitoring unit is provided to which the output signal of the encoder and a speed signal of the motor speed detection device are fed. The monitoring unit includes a comparator which compares the output signal of the encoder with the speed signal of the motor speed detection device, and the monitoring unit initiates an emergency action if the result of the comparison exceeds a threshold value. The solution improves the safety in belt driven traction sheave elevators, particularly if only one belt is used for the transmission between drive machine and traction sheave.
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