Diagnostics of hydraulic actuators is a way to increase the technical availability of combines and reduce maintenance and repair costs

Abstract

The importance of diagnosing hydraulic drives for increasing the technical readiness of combines and reducing maintenance and repair costs is substantiated. The methodological approach and results of the study on the creation of a system for technical diagnostics of the hydraulic steering drive of combines are presented. The list and standard values of diagnostic parameters (nominal, permissible, and limit values) are established. The physical processes that occur during the operation of the hydraulic drive are analyzed. The nature of changes in the structural parameters of hydraulic units and their impact on the operational performance of the steering of combines is determined. An assessment of the reasonable diagnostic parameters characterizing the general technical condition of the hydraulic steering drive and separately of hydraulic units and their elements is given. The expediency of using a particular diagnostic parameter is determined using the following criteria: reliability of technical diagnostics; labor intensity (duration) of diagnostics; adaptability of the object to diagnostics; versatility and cost of technical diagnostic tools; completeness and depth of diagnostics.