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Chemically active components which are available both in structure of material of a blanket and in lubricant, decay under the influence of temperature, a force field of a solid body and catalytic impact of a svezheobnazhenny surface of metal, are allocated in the form of active agents who react and form the modified layer. The modified layer has smaller (in comparison with the main metal) resistance to shift owing to what decrease in coefficient of friction and replacement of intensive adhesive wear softer corrosion and mechanical is provided. The condition of details of the rolling bearing in the presence of the modified layer does not change during all service life. However in case of a leakage of lubricant or loss in it chemically active components the modified layer is not formed that leads to metal contact and failure of the bearing. Metal contact causes sharp temperature increase, and also mechanical damages to a type of zadir on bodies of swing and nicks on the rings received as a result of shock loadings. Intensity of wear of details of the rolling bearing is influenced substantially by the process temperature which depends on the relative speed of sliding and the normal squeezing force. In process of temperature increase of process the speed of education and a share of the modified layer increase. Critical value of temperature determines a lubricant scope. The concentration of an active component in lubricant is higher, the wear resistance of the rolling bearing is higher. When toughening the mode of friction there is a competition of two processes – educations and wear of the modified layer and if wear prevails, then inevitably there will be a metal contact leading to failure of the bearing.

ВЗАИМОСВЯЗЬ ГЕРМЕТИЧНОСТИ ПОДШИПНИКОВЫХ УЗЛОВ ТРЕНИЯ С АБРАЗИВНЫМ ИЗНАШИВАНИЕМ ИХ ТРИБОСОПРЯЖЕНИЙРассмотрено влияние герметичности под-шипниковых узлов трения на износостойкость их трибосопряжений типа «вал -уплотнение» в стати-ческом, переходном (стартовом) и динамическом режимах, а также типов «кольцо -тело качения» и «вал -втулка» в зависимости от концентрации аб-разива в смазочном материале.Ключевые слова: смазочный материал, из-носостойкость, интенсивность изнашивания, абра-зивное изнашивание, трибосопряжение, герметич-ность, узел трения.S.P. Shets, V.I. Sakalo, A.G. Suslov CORRELATION OF BEARING FRICTION ASSEMBLIES WITH ABRASIVE WEAR OF THEIR TRIBO-COUPLINGTo ensure wear resistance of all tribo-couplings of a bearing assembly at the expense of the abrasive wear decrease it is necessary the solution of problems connected with the impermeability of their movable joints. In this case by the impermeability we imply a process of sealed "wall" formation which is able to separate reliably volumes with different environments at considerable changes of external factors of environment: temperature, dustiness, aggressiveness and others.The contact of two hard surfaces of tribocoupling of the "shaft-seal" type forms a system of cavities, capillaries of an arbitrary shape and contact patches. Under the action of pressure difference on separate capillaries arise leaks.The depressurization of bearing friction assemblies (leak moment) results in the decrease of wear rate of tribo-coupling of "shaft-seal" type, but a wear rate of other tribo-couplings such as "ring-solid of rolling motion", for frictionless bearings or "shaft-bushing" for friction bearings increases because of abrasive penetration into a contact area. The penetration of quartz particles (pollutions) through a sealing into a bearing assembly results in the increase of a constant of friction and initiation of abrasive wear in tribo-couplings of "ring-solid of rolling motion" and "shaft-bushing" types. The wear rate of "ring-solid of rolling motion" and "shaft-bushing" couplings depends on the abrasive concentration in lubricant and a leak at the outlet from the bearing assembly. For the wear resistance increase in tribo-couplings of bearing assemblies it is necessary not only to increase the hardness of contact surfaces, ensure optimum roughness, select materials in tribocouplings, but also to ensure the impermeability and lubricant keeping in a friction area.

Описано взаимодействие поверхностей пар трения типа «подманжетная шейкакромка манжеты» в конструкции закрытых радиальных шариковых однорядных подшипников со встроенными контактными уплотнениями, применяемых в качестве опор валиков ременного перебора на прессподборщиках «John Deere 864». Описана физиче-ская модель изнашивания пары трения типа «подманжетная шейкакромка манжеты». Исследовано влияние величины зазора на утечки смазочного материала из полости подшипника.Ключевые слова: смазка, смазочный материал, износ, трение, пара трения, шариковые подшипники качения, уплотнение.