抄録
Under existing circumstances, the determined measurement of maximum permissible PV value of oil impregnated sintered bearings is not established owing to the relatively obscure concept of the value. Accordingly in this study one measuring method was proposed, in which from the point of view that bearing temperature (libricant temperature) was the most direct indicator which showed the running state of the bearing, the precise coefficient of friction (μ) and the bearing temperature (T) corresponding to various PV values were measured by "step load method", then assuming the decay temperature of the lubricant, the PVμ value corresponding to that temperature was obtained from the PVμ-T line and besides knowing the μ value of the point, the maximum permissible PV value was finally obtained.
In this experiment, four kinds of oil impregnated sintered iron bearings were tested. Maximum permissible PV values measured were nearly propotional to the thermal conductivity of the bearings. This result seems to be natural because the measurement of maximum permissible PV value proposed in this study is based on the temperature rise of the bearings (lubricants), and conversely this seems to be the proof that the maximum permissible PV values measured in this study are reasonable.
