Evaluation methods for wear resistance of tribojoint contact surfaces depending on the lifespan of a lubricant

1. General description:
Evaluation methods for wear resistance of tribojoint contact surfaces 
depending on the lifespan of a lubricant  
Kyiv university experts in the field of friction and wear in machinery 
has developed evaluation methods for wear resistance of tribojoint contact 
surfaces depending on the lifespan of a lubricant. It can be used in 
mechanical engineering as well as in manufacture of technical lubricants 
to improve lubrication and its quality. Scientists are interested in 
cooperation with enterprises producing and improving lubricants. 
The description of the proposal:
The use of oils that do not meet the requirements of their operation 
leads to the decrease of machinery reliability. But at the same time the 
use of oils with unreasonable quality leads to inefficient use of petroleum 
products. To objectively assess the wear in vehicle transmission units a 
range of experiments were conducted in a standard friction registering the 
rate of tribojoint (friction pairs) wear after testing in lubricating media. 
The mechanisms of changing wear values of samples at constant loads and speed of rotation were established. Based on it evaluation methods for wear resistance of tribojoint contact surfaces depending on the lifespan of a lubricant were developed. They can be implemented in the research of machinery units and assemblies for improving their reliability and durability. 
Innovative aspects and benefits: 
The results of comprehensive research on this methodology will help optimize the term of sustainable use and selection of elements of the studied tribosystems (units and assemblies). By using this technology, it was found that the value of wear while studying surface friction in TAD-17i transmission oil medium of vehicles with a mileage of 90,000 km decreased by 47% compared to the same values obtained after testing in oil in a supply position. As a result, the lifespan of the oil extends to 90,000 km, compared with a regulated oil resource of this brand (50,000-70,000 km), when used in gear boxes and driving axles of cars and trucks. The economic feasibility of the development is its ability to establish the real lifespan of transmission oil for controlled vehicles. Recommendations to increase the operation term of the vehicle based on experimental data obtained in real conditions are given. When using the technology, it is possible to save raw materials through extending the lifespan of lubricants by reducing the time for their replacement and checking their condition in operation. This technology can be implemented in both academic institutions to study the state of machinery parts and in production companies.
Technology key words:
4.7.2. Fuel technology
3.4.2. Inorganic substances
2.9.4. Road vehicles. 
Additional information:
Practical value of the results: 
- the mechanisms of the wear depending on the values of the residual resource of transmission oils were established;
- it was found that excessive oxidation of oil increases its viscosity, thus the corrosivity of oil can increase. 
Current stage of development:
Research, laboratory testing, Copyright 
Additional information:
Chemmotology study of the processes is being carried out 
Intellectual property rights:
2. Applications:
Codes of industrial applications:
8.1. Materials and chemicals 
8.3. Industrial equipment and machinery
9.1. Transport, haulage 
Existing and potential areas of application:
The methodology proposed by the applicant can be used by manufacturers of technical oils, enterprises which use metalworking machines, equipment and vehicles.
3. Cooperation:
Joint further development
Adaptation to customer needs
Type of the desired partner:
Plants producing lubricants and maintenance organizations   
Partner’s sphere of activity:
Automotive and metalworking industries
Partner’s tasks:
Practical implementation
Preferred countries:
4. Information about your organization:
Research institute / university 
The size of organization (the number of employees):
5. Contact information:
National Transport University 
01010 1 Suvorova st.
Kyiv / Ukraine
Contact person: 
Savchuk Anatoliy Mykolayovych
Department of Manufacturing, Repair and Materials Engineering
 (044) 280-18-86
6. Authority 
Authorized person:
Dmytriyev Mykola Mykolayovych