Ensuring the operability and fault tolerance of machinery by redundancy of replaceable elements

Abstract

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.

Increasing the operational reliability of tractors by backing up the replacement elements

“…The initial information for substantiating the methods of reserving the repair resources of elements during the technical inspection and repair of tractors was data on the production and technical operation of tractors -logs of registration of failures and operating time of machines, operational and intermediate reports of service managers of Agroresource LLC, service documentation on carrying out repair and maintenance operations, schedules of PPR and technical inspection of machines, defect lists [2]. The sampling, in addition to data on the first replacements of parts, contained information about the number of replaced parts, their location, the serial number of the replacement and its brief reason.…”

“…In the process of their intended use, tractors and their elements under the influence of external and internal factors lose their efficiency and consumer qualities [1][2][3][4][5]. To achieve a high level of operational reliability of tractors at the places of use, technological and organizational measures are necessary to ensure prompt and high-quality elimination of failures and malfunctions [6][7][8][9].…”

“…In both cases, the restoration of the machine's performance is carried out by replacing individual faulty or worn out units and assemblies with repaired or new ones from the number of spare parts or the stock of exchange units [1,[10][11][12][13][14][15]. Here, the tractor's adaptability to carry out the specified types of work, as well as to work on refueling, preparation for use, storage and other operations performed during tractor operation, comes to the fore [2,8].…”