Abstract
The analysis of the manufactured means for monitoring and diagnosing the technical condition of the hydraulic pump of agricultural machinery has shown that the main devices for determining its working properties are expensive and demanding to carefully observe the rules of operation and cleanliness of the working fluid flowmeters. The need to diagnose pumps directly during the operation of machines forces us to look for other ways to diagnose pumps without connecting flow meters, for example, amplitude-phase diagnostic methods based on pressure pulsation parameters in the pressure line. (Research purpose) The research purpose is developing a prototype of a diagnostic tool that provides monitoring of the technical condition of hydraulic pumps during operation using modern element base of electronic devices. (Materials and methods) Studied the current state of the issue and equipment for the diagnosis of hydraulic units by the stato-parametric method. We have proposed a new method of continuous diagnostics using an embedded electronic device for monitoring operation parameters and evaluating pressure pulsation indicators generated by the pump. A prototype of the device was developed and experimentally determined the dependence of the pressure pulsation parameters and the hydraulic pump supply coefficient. We considered the issue of reducing labor costs in the express diagnostics of the hydraulic unit due to the introduction of such electronic devices. (Results and discussion) They have shown that as a result of the introduction of modern electronic means of technical control, it is possible to significantly simplify and speed up diagnostics, as well as automatically record the parameters and operating modes of hydraulic units of agricultural machinery. (Conclusions) Proved the possibility of diagnosing hydraulic pumps by the pulsation coefficient and justified the need to increase the controllability of hydraulic drives by installing points for connecting pressure sensors.
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