Abstract
In allusion to WSM-3 non-asbestos phenolic resin-based friction material, the experimental devices are set up for studying tribological properties of the WSM-3 resin-based non-asbestos brake shoe braking on 16Mn steel. According to collected experiential data of physical test, the change rules of the transient/mean friction coefficient are studied with contact pressure, sliding velocity, and contact surface temperature, and then the curves are drawn. The changing law of the friction coefficient is explored with the different-condition parameters, and the variation mechanism of friction performance of WSM-3 brake shoe material is discussed. The experiment results show that the frictional properties of the materials have not only strong system dependency but also strong coupling with the working conditions of the system. It is required to consider the transient friction coefficient or the average coefficient of friction as a variable in the material tribological design.
Highlights
Brake shoe is the most important part of large machinery brake system
The friction performance of the brake shoe guarantees the safety and the reliability of the brake; if the performance of the friction material cannot meet the design requirements, there will be the possibility of equipment accidents and personal accidents.[1,2,3]
The laws of the transient friction coefficient with the braking time are shown in Figure 3 under the conditions of fixed contact surface temperature, fixed contact pressure, and constant sliding speed
Summary
Brake shoe is the most important part of large machinery brake system. The friction performance of the brake shoe guarantees the safety and the reliability of the brake; if the performance of the friction material cannot meet the design requirements, there will be the possibility of equipment accidents and personal accidents.[1,2,3] The WSM-3 material is a resin-based friction material,[4,5,6,7] using other fibres[8,9,10] instead of asbestos fibre[11] with the following advantages: environment friendly, dust free, and non-asbestos.[4,5] The friction properties of the new brake shoe material require deepgoing research.The foremost performance parameter of the friction material is the friction coefficient.[12,13] The friction behavior of the material is largely influenced by a variety of factors.[14] The showing performances have a strong uncertainty.[15] The physical and chemical parameters[16,17,18,19] of the material are strongly coupled with the working conditions and the environmental medium during the friction process, such as the properties of the material itself[20] (chemical, physical, and mechanical), the experimental conditions[21,22,23,24,25] (contact pressure, sliding velocity, temperature, and medium environment), Creative Commons CC-BY: This article is distributed under the terms of the Creative Commons Attribution 4.0 License (http://www.creativecommons.org/licenses/by/4.0/) which permits any use, reproduction and distribution of the work without further permission provided the original work is attributed as specified on the SAGE and Open Access pages (https://us.sagepub.com/en-us/nam/ open-access-at-sage).
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