| 摘要 |
PURPOSE:To cool main spindle devices effectively and evenly by a method wherein operating liquid is flowed through vapor pipes, liquid pipes and a communicating pipe to transport the quantity of heat of bearings from the hollow chambers thereof to heat radiating devices. 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 devices 8, 81 through the vapor pipes 10, 101 and is cooled by cooling fans 9, 91. The condensed operating liquid returns into the hollow chambers 71, 7 of the bearing stands 41, 4 from the liquid pipes 12, 121 through the vapor pipes 101, 10. The liquid pipes 12, 121 are mutually communicated through the communicating pipe 13. |
