Polupan E. The increasing of the efficiency of lifting and transport machines' braking by applying the new frictional materials

Thesis is deals with the increasing of efficiency of lifting and transport machines' braking by applying the new frictional materials on the basis of carbon-carbon. For this purpose the mathematical model is suggested for the calculation of the volume temperature state of the frictional material of braking device. Model is based on the processes of heat exchange of the rubbing surfaces that appear during recurrent and short-term regime of brake's work and on the general theorem of heat conductivity about multiplying of decisions and was decided due to the developed software products on the base of PECM. To achieve stated purposes the mathematical model of volume temperature state of frictional material of braking device, that works in the recurrent and sport-term regime was developed, rational thermal and physical exponents of frictional materials were defined, comparative analysis of frictional materials that use in modern braking device and ones that were developed on the base of carbon-carbon was carried out, experimental investigations were carried out to control model's adequacy, to determine regularities of changes of friction's coefficient of frictional materials on the basis of carbon-carbon.