Study of the influence of pollution particles of 5 мkм and less on the anti-wear properties of the working fluids of hydraulic drives of construction and road machinery

Abstract

Problem. An analysis of the impact of contamination of the working fluid on the state of the hydraulic equipment elements of construction and road machines, the efficiency of their operation, and also the use of the coefficient of anti-wear properties to determine the service life of working fluids is presented. The equation of the dependence of the wear rate of hydraulic equipment elements on the coefficient was obtained. Operational tests of the GR165 motor grader were also carried out, which showed that the service life of the Hydro HV 46 working fluid according to the coefficient of anti-wear properties is approximately 1184 machine hours. Methodology. In the process of studying the state of the matter, the method of analysis was used, and in theoretical studies – the analytical method, which is based on the theory of interaction of working bodies with the developed environment, as well as the provisions of the theory of reliability, probability and mathematical statistics. Results. The research results showed that coefficient Kj of anti-wear properties can be the only integral indicator of the quality of working fluids and determine their service life in hydraulic drives of Construction machines. Originality. The equation was obtained for the rate of wear, taking into account the interaction of charged particles of wear with friction surfaces. For the stationary friction mode, the equation of the balance of the contamination particles that are part of the working fluids of the hydraulic actuators and the rate of wear of friction vapor were obtained. The use of KJ coefficient as an indicator of working fluids of hydraulic drives of construction machines is presented. Practical value. The research results showed that the coefficient Kj of anti-wear properties can be the only integral indicator of the quality of working fluids and determine their service life in hydraulic drives of Construction machines.