| 摘要 |
PURPOSE:To cool a main spindle device effectively and evenly, by a method wherein a working liquid is passed through a heat exchanger liquid tube, and a calorific value of a bearing rest is transmitted to a radiator from a hollow chamber. CONSTITUTION:Calorific values of bearings 3-31, which received heat by bearing rests 4-41, are taken away as evaporation latent heat when a working liquid such as Flon in hollow chambers 7-71 is made to evaporate by heating the working liquid. Vapor such as the evaporated Flon is moved to a radiators 8 through the inside of a branch tube and a confluent tube of a heat exchanger tube 10 by making use of its own vapor pressure and cooled by a cooling fan 9. The condensed working liquid is returned to the hollow chambers 7-71 of the bearing rests 4-41 by moving along an inner wall of the heat exchanger tube 10. |
