Оценка показателей надежности гидрооборудования с учетом влияния величины рабочего давления

Abstract

Classification and analysis of failures, as well as a description of the mechanism for the formation of failures show that the most significant operational factors affecting the change in reliability indicators are the pressure of the working fluid (operating load) and the state of the working fluid (degree of contamination). When assessing the reliability of hydraulic equipment, it should be borne in mind that, in relation to the magnitude of the load, all elements of hydraulic equipment can be enlarged into three groups: nodes and friction pairs, leading to failures due to the occurrence of the limiting condition of these elements for wear; elements whose failure occurs due to fatigue damage; elements whose failures occur regardless of the magnitude of the load, and are associated with the kinematic and dynamic characteristics of the structure (inertial forces, wave processes). The influence of the pressure of the working fluid (operating load) in assessing the reliability indicators at the design stage for all three groups of elements is considered. To determine the parameters of hydraulic systems at the operational stage, to assess the actual reliability indicators, a set of tools for diagnosing hydraulic systems was developed, developed by the Association of Enterprises Corporation "Gidroeleks" together with the department "Hydraulic machines" named after academician G. F. Proskura, with which the measured parameters can be recorded on an internal memory card or transferred via wireless Bluetooth to a personal computer PC or Android device (smartphone, tablet) for further processing. The theoretical dependences given together with the processed data obtained using the developed set of diagnostic tools allow us to determine the quantitative dependencies of failures and evaluate the reliability indicators of hydraulic equipment in real operating conditions (taking into account operating loads).