The Influence of an Operating Conditions on the Friction Coefficient in Transportation Machines Drives

Abstract

The publication presents the construction of the station for testing the friction coefficient under high pressure and low slip velocity values. These conditions of cooperation of friction pairs occur in the drives of transport machines such as belt conveyors and suspended monorails. The value of the friction coefficient, depending on the operating conditions such as moisture and rock or coal dust pollution, has a significant impact on the correct and efficient operation of such drives. The features of the station allow mapping the operating conditions on a laboratory scale. As part of the research, appropriate friction samples made of rubber or polyurethane were prepared. Referring to the conditions of conveyor operation and conditions of contact of the conveyor belt with the drive drum, the values of unit pressures and values of slip speed occurring in the drum drive of the belt conveyor were determined. A series of laboratory tests were carried out for the friction pair rubber drum lining – conveyor belt cover. The tests were carried out for four different states of friction vapor surfaces, namely for dry and wet samples, as well as for samples in clean or contaminated with stone dust. As a result of the tests, the values of friction coefficients for various surface states were determined, which will be valuable information for designers of friction drive systems of transport devices.

Conveyor Intermediate TT Drive with Power Transmission at the Return Belt

“…0.72. The measured values of the coefficient are the same as the results obtained in other studies for the rubber-rubber friction pair [54][55][56]. Similar coefficients of friction for the two tested variants confirm the correct estimates of the normal force and the correctness of the measured operating parameters.…”

Development of an Innovative Attachment Determining Friction Parameters for Quality Assessment in Sustainable Processing

“…The friction on the contact surface of two or more different materials is a particularly important matter in the processes of processing, transport, and mutual contact of bodies [13][14][15][16].…”

A Preliminary Studies of the Impact of a Conveyor Belt on the Noise Emission

“…The noise of air pumping takes place at the extreme points of contact between a belt and pulleys or idlers, and between idler supports; this is where the belt's transverse vibrations of the highest amplitude occur [52,53]. Air resonance can be created in the tread grooves of the pulley lagging, and the resulting amount of noise generated depends on the shape of the lagging tread [54]. This is due to the fact that the shape of the tread affects the friction conditions and stresses at the belt-pulley interface [55].…”

“…As a result of turning the viscose and elastic belt on the idler, energy is dissipated, and part of it is lost to acoustic phenomena [53,60]. Energy losses are compensated by an increase in the belt tension, which is defined as the resistance of denting the belt into the idler [54,55]. Consequently, the idler shell also vibrates [61].…”