| 摘要 |
PURPOSE:To cool main spindle devices effectively and evenly by a method wherein operating liquid is flowed through a vapor pipe and a liquid pipe to transport the quantity of heat of bearings from the hollow chambers thereof to a heat radiating device. CONSTITUTION:The quantity of heat of the bearings 3, 31, which received the heat in bearing stands 4, 41, is deprived as the latent heat of evaporation when it heats the operating liquid, such as Flon or the like, in the hollow chambers 7, 71 and vaporizes it. The vapor of the vaporized Flon or the like moves to the heat radiating device 8 through the branching and joining pipes of the vapor pipe 10 by utilizing the vapor pressure of itself and is cooled by a cooling fan 9. The condensed operating liquid returns into the hollow chambers 7, 71 of the bearing stands 4, 41 through the joining and branching pipes of the liquid pipe 12 by utilizing the gravity thereof. |
