Organization of technical service of machines under zone operating conditions provides for the possibility of determining the list of units exposed to climate effects and the estimation of zone correction factors to the consumption rates of spare elements during repair and maintenance [1].

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.

The main task in mechanical engineering is to ensure the efficiency of the machine-tractor fleet. Technical operation of machines requires new organizational and technological approaches to maintaining it in working condition in zonal conditions of use. Since every hour of downtime of this expensive equipment leads to high costs, one of the important tasks will be to reduce the downtime of machines for maintenance and repair. Development of import substitution programs and food security of regions and regions of the country is an important area for scientific and public organizations to solve the tasks set by the government of the Russian Federation. In this regard, the study of foreign technologies and the introduction of their own in the production of machinery and agricultural products. The aim of the study is a mathematical description and justification of fault tolerance of machines to ensure performance at a given level.In the article deals with the issues of ensuring the efficiency of technical systems (machinery and equipment) and planning the number of spare elements during technical service. It is rather simple to establish the cycles of repair time of machines and technology, if the variables of the technical state determining the operability of the machines during operation are deterministic. In practice, in most cases, the performance is determined by the stochastic nature of the influencing factors, forcing to take into account the technical and mathematical methods for their description. In a situation where the recovery time of the failed element is an order of magnitude shorter than the uptime, or the restoration is reduced to replacing the element with a backup, it is natural to accept the model of an instantly restored element.

No abstract

The article deals with the issues of choosing a redundancy method and the frequency of replacing tractor elements while ensuring the level of operational reliability in agricultural enterprises. It is noted that the operability of the system is ensured as long as there are reserve elements available to replace the failed main elements (and there is a possibility of switching the reserve elements into an operational state). One of the general methods for solving this problem is a method based on the use of Markov processes. In this case, the process of changing the states of the tractor is presented as a dynamic system, the state of which changes discretely in continuous time in a random manner.