ОДНО КРИТИЧЕСКОЕ ЗАМЕЧАНИЕ К ИСПЫТАНИЯМ БУКСОВЫХ ПОДШИПНИКОВЫХ УЗЛОВ СКОРОСТНОГО И ВЫСОКОСКОРОСТНОГО ПОДВИЖНОГО ЖЕЛЕЗНОДОРОЖНОГО СОСТАВА

Abstract

The release of rolling stock and its components for free circulation on the territory of the Customs Union shall be allowed only upon conformity confirmation with the requirements of Technical Regu lations ТР ТС 001/2011 and ТР ТС 002/2011. For conformity assessment of such critical safety related rolling stock component as axle-box bearings the supporting standard GOST 32769–2014 (or GOST 18572–2014) is used. For traditional and high-speed rolling stock the standard foresees changing of the single run duration in the course of full-scale bench tests of axle-box bearings for determination of certification parameter. The example of the test runs of a high-speed train showed that during the time of such single run (in accordance with the standard) the axle-box bearings fail to reach the maxi- mum values of the certification parameters, which can result in unreliable conformity assessment of the axle-box bearings with the safety requirements. With the purpose to increase the reliability of the assessment of the maximum temperature of the axle-box bearings for traditional and high-speed rolling stock and also to bring the conditions of the bench tests of axle-box bearings to the full-scale operating conditions as possible, we propose to consider in the supporting standard the possibility of upholding the duration of single runs while conducting bench tests unchanged, independent of the design speed of the rolling stock