| 摘要 |
PURPOSE:To reduce the wear of a slide surface and to prevent scuffing thereof by supplying sodium on the side of a surface sliding due to capillary phenomena of at least one of porous materials mutually sliding with liquid sodium or flow of sodium, to the side of the sliding surface. CONSTITUTION:In the case of a steam generator of FBR, a heat transfer pipe 1 and a heat transfer pipe support portion 2 move relatively in accordance with a temperature variation. A porous material 17 is used in the support portion sliding with the heat transfer pipe 1, and is mounted on the flange portion 22 of a supporting base 16 and is pressed from the upward by an upper plate 18 having a liquid sodium flowing hole 19. The inner diameter D of the flange 22 and the upper plate 18 is made slightly smaller than the diameter (d) of the metal 17 so that the flange 22 and the upper plate 18 do not directly contact the metal 17. Therefore, the liquid sodium 3 is supplied to the metal 17 through the hole 19, and by the capillary phenomena of numberless minute holes 23 connected by fine communicating passages 24 of the metal 17, the liquid sodium is supplied continuously onto the slide surface, thus carrying out a lubricating operation. |
