Machinery & Energetics

The RESUME. The importance of diagnosing hydrulic drives to increase the technical readiness of combines and reduce maintenance and repair costs is substantiated. The methodical approach and results of research on creation of system of technical diagnostics of a hydraulic drive of a steering of combines are resulted. The list and normative values of diagnostic parameters (nominal, admissible, limit) are established. The analysis of physical processes that occur during the operation of the hydraulic drive is carried out. The character of change of structural parameters of hydraulic units and their influence on operational indicators of working capacity of steering of combines is established. The estimation of the proved diagnostic parameters which characterize the general technical condition of the hydraulic drive of a steering and separately hydraulic units and their elements is given. The expediency of application of this or that diagnostic parameter is determined using the following criteria: reliability of technical diagnosis; complexity (duration) of diagnosis; suitability of the object for diagnosis; universality and cost of technical diagnostics; completeness and depth of diagnosis.

diagnostics, hydraulic drive, structural parameters, technical diagnostics, repair, maintenance