the heat pipes releasing the heat absorbed in the loading region and forming liquid condensate 15 the condensate flows downwards returning to the evaporate section with the assistance of gravity as shown in the enlarged i view and thus maintaining a continuous heat transfer process in the heat pipe due to the large latent heat of vaporization the heat generated in the loading region is promptly spread over the entire circumferential surface area of the bearing to be dissipated as a result the temperature in the loading region can be significantly reduced and that in the entire bearing can be more uniform for a copper bearing water may be one of the best choices for the working fluid in the heat pipe for other types of bearing materials proper anti corrosion agents or coating may be needed if water is to be selected as the working fluid when the heat generated in the loading region is large external cooling may be required to maintain the temperature in the loading region at an acceptable level for this purpose heat pipes with an external condenser may be employed fig2 shows such a bearing with the bearing house cooled by heat pipes having an external condenser the bearing house is comprised of an inner ring 16 and an outer seat 17 a solid bushing 18 which may be a single piece or two halves of a thin walled cylinder is applied in the bearing house an outlet 19 on the top section of the bearing connects the groove heat pipes with an external cooling source the aforementioned cooling source may be a two phase heat exchanger that enables the vapor from the groove heat pipes to be condensed the cooling source should also enable the condensate to flow back into.