Definition of reliability parameters of the spacer plate of a jaw crusher depending on the characteristics of the working environment and the material of manufacture

The object of the study is the spacer plate of a Jaw crusher. The Jaw crusher is the main machine in the crushing and sorting scheme. An unexpected failure of one of the crusher parts leads to a stoppage of the entire scheme. One of the important parts of the crusher is the spacer plate, which is in a complex, alternating stress state. The paper investigates the reliability parameters of the spacer plate of a jaw crusher in the processes of crushing crushed stone, which is an aggregate in the manufacture of concrete. The calculation of the strength of the spacer plate in existing methods is carried out using empirical formulas. A number of functional methods are also used. However, most functional methods have inherent shortcomings that are built on statistical approaches, which can lead to inaccurate reproduction of the picture of the failure of machine elements. In the work, the problem is solved by using a combined model, namely the linear damage accumulation algorithm in combination with a finite element model to which the Weibull distribution is added, which is the most universal method of functional distribution for determining the limit states of parts and machine assemblies. Such a solution allows to determine the reliability parameters and establish a real picture of the process. A solid-state model of a jaw crusher has been developed and the loads applied to the spacer plate have been calculated. Using the nCode EN Constant and nCode EN TimeSeries presets, which are built into the ncode DesignLife product of Hottinger Baldwin Messtechnik GmbH (Germany), the parameters of the failure life and fatigue strength of the crusher spacer plate were determined. In the nCode EN TimeSeries preset, the WeibullAnalysis glyph was used for data analysis. The results of the study can be used in studies of a wide range of machines to determine the limit states of machine parts and assemblies