Improvement of Operational Parameters for High-Precision Tribosystems

Abstract

In producing plunger pairs of high-pressure fuel pumps, product quality management has a problem of improving their durability and reliability. To improve the performance of products, it is advisable to pay special attention to the tribological characteristics of the friction surfaces that are part of such products, the conditions of their mutual contact, and lubrication. Using a scientific and experimental approach, friction pairs simulating the plunger pairs of high-pressure fuel pumps and aerial gases and diesel fuels used as working lubricants are investigated. The studies take into account the dual nature of friction. The obtained results do not contradict elastohydrodynamic and adhesion-deformation theories. A set of research equipment has been developed, demonstrating the occurrence of secondary currents in the contact zones and the effect of tribocavitation. In the process of friction, microbubbles dissolve in the diffuse contact region. It has been established that with certain types of microgeometric relief, contact load, and a temperature, it is possible to set precision surfaces, which may explain some types of failures of high-pressure fuel pumps and create conditions for expanding the temperature range of these products.