Investigation of passenger lift failure by the operation data

Abstract

The article is devoted to investigation of reliability of passenger lifts during operational process and obtaining quantitative failure data required to repair and improve the technical service system. The paper considers lift construction and its main elements. All elements of a passenger lift were ordered with the help of the system analysis, their subordination and relationships were determined; the structural model was built and presented as a tree of goals with hierarchical structure which determines the order of reliability calculation. Using sampling inquiry the interval censored sample considering the availability of failed and working lifts was formed. The authors studied the operational observation materials recorded in control station journals. The obtained statistical information was analyzed and distribution of failures of lift elements was introduced at all levels of the tree of goals.

Keywords

• passenger lift
• hoist
• asynchronous motor
• operating reliability
• failure
• systems analysis