Dynamic thermophysical properties and transient temperature field of rubber wheel of roller guide shoe
QU Chao
ZHU Zhen-cai
CHEN Guo-an
PENG Yu-xing
XU Lei
Abstract：In order to research the thermophysical properties and temperature field of Polyurethane (PU) and polyamide 1010 composite (PA1010 + 20% PTFE + 5% MoS_2) which were employed as the rubber wheels of roller guide shoe in coal mine, thermo-analysis experiments were conducted on DSC-TG and LFA. The experiment results show that with the temperature increasing, the specific heat capacity increases rapidly, while the thermal diffusivity decreases exponentially, and the thermal conductivity almost keeps stable for both PU and PA composite. Moreover, thermal diffusivity and thermal conductivity of PA composite are obviously lower than those of PU. Based on the heat conduction theory and rubber wheel's working condition ,the temperature field theoretical model of rubber wheel was established. By calculating the theoretical model, it is found that the rubber wheel experiences the periodical cycles of heat absorption and liberation, and the temperature increases gradually during this process. The temperature rise of the section of wheel mostly distributes on the surface layer where the temperature distributes nonuniformly and changes greatly. The temperature rise of PA composite is lower than that of PU, and the difference in temperature between PU and PA composite increases rapidly with the increasing of velocity. Therefore, PA composite is superior in heat-resistance,which can decrease the temperature rise of rubber wheel efficiently.
Keywords：rubber wheel of roller guide shoedynamic thermophysical propertiestransient temperature fieldpolyurethanepolyamide composite
Publication Date：2010-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：6( 154-159 )