Abstract
The influence of triboelectric phenomena on the wear-friction properties of microasperities contacts of friction couples of drum – shoe brakes was explored. As a result of the conducted research into the wear-friction properties of metal-polymeric frictional couples of braking devices under laboratory and operational conditions at the nano-, micro- and millilevel during triboelectric interaction, the regularities of changes were established: – of magnitudes of the contact difference of potentials of frictional couples grey iron – polymers of the drum-shoe brake on the surface temperature of linings and specific loads; – of circulating thermal and tribocurrents on the time of friction interaction of frictional couples cast iron – polymers and – polymers at different sliding velocities; – of generated tribocurrents in the contact of two-layered structures – and circulating tribocurrents through the three-layered structure – polymer – steel on the surface temperatures.
Highlights
Modern science has accumulated a lot of information on the wear mechanisms of frictional couples of braking devices, but the problem of revealing the nature of their friction interaction is far from the final solution
The papers of numerous scientists are devoted to studying triboelectric phenomena of metal-polymeric frictional couples of braking devices, many studies contain contradictory information, and a number of problems of the triboelectric friction interaction are left out of focus
Conducted experiments are a continuation of research into triboelectric phenomena in meta-polymeric frictional couples and allow the expansion of the database on triboelectric processes in braking devices
Summary
Modern science has accumulated a lot of information on the wear mechanisms of frictional couples of braking devices, but the problem of revealing the nature of their friction interaction is far from the final solution. One reason stems from the fact that during the friction process as a result of electric phenomena in a friction contact of metal-polymeric tribological conjunction, there occur substantial changes in properties of the surface layers of materials. The papers of numerous scientists are devoted to studying triboelectric phenomena of metal-polymeric frictional couples of braking devices, many studies contain contradictory information, and a number of problems of the triboelectric friction interaction are left out of focus. The mechanisms of the influence of triboelectric phenomena on wear-friction properties of metal-polymeric frictional couples of braking devices have not been established yet. Establishing the regularities of triboelectric interaction between the frictional couples of brakes is relevant in terms of the implementation of new methods for increasing the wear-friction properties of metal-polymeric frictional couples of braking devices
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