Abstract
Currently, a large number of elevator manufacturers do not consider the actual impact speed during the selection of buffers or the calculation of guided travel, which creates safety risks. By analy...
Highlights
The distance between the counterweight and buffer is an important parameter that is closely related to the installation and use of elevators
According to article 5.2.5.6.1.1 of EN 81-20:2014 Safety Rules for the Construction and Installation of LiftsLifts for the Transport of Persons and Goods, the guided travel of an elevator car without compensating ropes or an antirebound device at the highest position shall be in accordance with the following calculation: counterweight on a fully compressed buffer + 0.035 Á v2, in which 0.035 Á v2 is half the gravity stopping distance corresponding to 115% of the rated speed of the elevator
Papers[2,3,4,5] proposed a method for calculating the maximum distance between the counterweight and buffer; this method is based on the requirements of EN81-41:2010, which states that the impact speed should not exceed 115% of the rated speed of the elevator.[2,3,4,5]
Summary
The distance between the counterweight (or car) and buffer is an important parameter that is closely related to the installation and use of elevators. 3. The equation representing the relationship between MTrav (the actual mass of the traveling cables) and x (the descending distance of the counterweight) is expressed as follows
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