Diagnostics of hydraulic density of plunger couple of tractor diesel

Abstract

The article considers the process of developing diagnostic mathematical models that take into account the influence of the hydraulic density of the plunger pair associated with wear. To estimate leaks of precision parts, methods for calculating the cycle feed for wear of plunger pairs are presented. The position of the cut-off edge relative to the hole changes due to the injection movement and rotation of the plunger during the regulation of the fuel cycle. The method and results of accelerated testing of plunger pairs are also presented.

Forecasting characteristics affecting the reliability of the operation of the machine and tractor fleet over time

“…The most frequently used model to describe the rate of change of parameters is the stationary random function A vivid example of such a process is the process of increments of the values of the cyclic fuel supply by the high pressure pump. The test experience shows that the process characterizing the random component of the rate of change of the parameters of many types of products, in the overwhelming majority of cases, is a stationary normally distributed random process with an exponential or exponential-oscillatory correlation function [6,7].…”

“…The value of the coefficient in the formula (5) is found from the relation (6) . The estimates of the moment functions of the parameter increment process obtained as a result of the calculation for calculations are conveniently represented as a series: Table 2.…”

Justification of cooficients reqiered for correction of rates of detail needs for machine maintenance and repair

“…Observations were carried out until the objects failure. The capacity of picking was more than 180 values of operating time of various replacement parts [1][2].…”

“…Changes in the resource parameters of parts under the influence of the above mentioned factors, increase the duration of machine downtime for repair and maintenance and increase the related to these factors costs [5,9] accordingly. In this regard, it becomes necessary to correct the norms of rates of their consumption in the form of a system of correction coefficients depending on climatic conditions [2,6]. The aim of the study is-to substantiate theoretically the possibility of adjusting the norms of the need for parts for machine maintenance and repair in Irkutsk region conditions.…”