Predicting the residual resource of pneumatic electromagnetic valves.

Abstract

The article is devoted to the analysis of the state of the problem of determining the residual resource of pneumatic electromagnetic valves (PEV). Such valves are used in many branches of industry, both for civil and critical purposes, and therefore, the calculation of the residual resource is of great importance for predicting their service life. The article analyzes the main areas of application and indicates a circle of scientists who deal with various issues related to pneumatic electromagnetic valves, including the problems of increasing the PEV resource. It has been established that the service life of PEV depends on the degree and number of loads, the duration of use, the presence of primary defects, and resistance to various external influences such as temperature, humidity, and corrosion. It has been investigated that the calculations of the residual life of PEV are based on conducting laboratory tests for destruction and durability, which allows for the development of recommendations for increasing the operational life of PEV. However, these approaches do not take into account the random nature of degradation processes. Therefore, a more effective method of calculating the residual life of pneumatic electromagnetic valves is the probabilistic physical method with DM-distribution of the degradation resource. According to one of the methods of DSTU 8646:2016, having data on the number of valve operation cycles in which there are no failures and data on the number of valve operation cycles in which critical destruction occurs, the calculation of the residual resource of PEV was carried out. Using for that the probabilistic-physical method gave results commensurate with real operating data. The quality of manufacturing, optimization of design features, and timely and high-quality statistics of PEV defects also significantly affect the forecasting and assessment of the remaining service life of pneumatic electromagnetic valves.