CORRELATION OF BEARING FRICTION ASSEMBLIES WITH ABRASIVE WEAR OF THEIR TRIBO-COUPLING
Rubrics: FRICTION AND WEAR
Authors:
1.
Bryansk State Technical University
(Department of Automobile Transport, Professor)
employee
Bryansk, Bryansk, Russian Federation
employee
Bryansk, Bryansk, Russian Federation
2.
Bryanskiy gosudarstvennyy tehnicheskiy universitet
(professor)
3.
Bryansk State Technical University
(Professor, Honored Worker of Science and Technology, Laureate of the Government Prize)
National Research Nuclear University “MEPhI” (Professor)
Bauman Moscow State Technical University (Professor)
Bryansk, Bryansk, Russian Federation
National Research Nuclear University “MEPhI” (Professor)
Bauman Moscow State Technical University (Professor)
Bryansk, Bryansk, Russian Federation
Type:
Article
Pages:
from 36
to 40
Status:
Published
Received:
23.06.2016
Accepted:
23.06.2016
Published:
23.06.2016
Language:
Russian
Keywords:
lubricant, wear resistance, wear rate, abrasion, tribo-coupling, impermeability, friction assembly
Abstract (English):
To 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 tribo-coupling 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 “shaf-tseal” type, but a wear rate of other tribocouplings such as “ringsolid 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 tribocouplings of “ringsolid of rolling motion” and “shaftbushing” types. The wear rate of “ringsolid of rolling motion” and “shaftbushing” 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 tribo-couplings, but also to ensure the impermeability and lubricant keeping in a friction area.
To 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 tribo-coupling 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 “shaf-tseal” type, but a wear rate of other tribocouplings such as “ringsolid 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 tribocouplings of “ringsolid of rolling motion” and “shaftbushing” types. The wear rate of “ringsolid of rolling motion” and “shaftbushing” 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 tribo-couplings, but also to ensure the impermeability and lubricant keeping in a friction area.
Keywords:
lubricant, wear resistance, wear rate, abrasion, tribo-coupling, impermeability, friction assembly
lubricant, wear resistance, wear rate, abrasion, tribo-coupling, impermeability, friction assembly
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