Technology, energy, agriculture transport AIC

Dmytro Borysiuk – Candidate of Technical Sciences (Ph. D in Eng.), Senior Lecturer of the department of automobiles and transport management of Vinnytsia National Technical University (21021, Vinnytsia, Voinov-Internationalistov st., 7, room 3222, e-mail: bddv@ukr.net, https://orcid.org/0000-0001-8572-6959).

Igor Tverdokhlib – Candidate of Technical Sciences (Ph.D. in Eng.), associate professor of the department of general technical disciplines and occupational safety, Vinnytsia National Agrarian University (21008, Vinniytsia, st. Sonyachna 3, VNAU, 21008, e-mail: igor_tverdokhlib@yahoo.com, https://orcid.org/0000-0003-1350-3232).

Ihor Kupchuk – Ph.D. of Engeneering, Associate Professor at the Department of General Technical Disciplines and Labor Protection of Vinnytsia National Agrarian University (3, Sonychna St., Vinnytsia, 21008, Ukraine, +380978173992, kupchuk.igor@i.ua, http://orcid.org/0000-0002-2973-6914).

Yurii Polievoda – Candidate of Technical Sciences (Ph.D. in Eng.), associate professor of the department of technological processes and equipment for processing and food production, Vinnytsia National Agrarian University (21008, Vinnytsia, st. Sonyachna, 3, 21008, e-mail: vinyura36@gmail.com, https://orcid.org/0000-0002-2485-0611).

The machine-tractor fleet of enterprises is an important link in the production of products of various branches of industry in Ukraine. The timely performance of transport, agricultural, road construction and other works, and ultimately the cost of products or services, largely depend on its effective work.
Rolling bearings are one of the most common technical devices used in machines. They largely determine the reliability and performance of devices.
The resource of the tractor chassis is mainly determined by the resource of the rolling bearings. Defects in the manufacture and operation of bearings affect the vibration signal in different ways and have different diagnostic signs. This makes it possible to identify defects at the stage of their occurrence and predict further development.
In this work, the method of vibrational non-destructive testing is considered when diagnosing the bearing assemblies of the hubs of steered axles of wheeled tractors of traction class 1.4. The mathematical model developed by the authors for diagnosing the bearing units of the hubs of steered axles of traction class 1.4 wheeled tractors is aimed at determining the technical condition of the rolling bearings and allows predicting their possible service life. The developed mathematical model allows you to determine the clearances in the bearings, vibration frequencies and the average value of deformation caused by the load on the bearing depending on the frequency of rotation of the separator and the inner ring of the bearing, the initial contact angle of the rollers in the bearing, the radius of the seat of the roller, the inner diameter of the bearing, the radius of curvature of the bearing. An equation was created to determine the unbalance of the hub of the steered axles and the seating clearance of the bearings.

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