| 摘要 |
PURPOSE:To prevent fluid on the primary side from mixing with the secondary fluid without being affected by the difference in quantity of expansion and contraction caused by the change in temperature, by providing a labyrinth seal consisting of disks having several grooves to an outer shell and an outer shroud, respectively. CONSTITUTION:The fluid on the primary side in the upper chamber 19 tends to flow into the lower chamber 20, because the pressure in the upper chamber 19 is higher than that in the lower chamber 20. The pressure loss in the joint part between the outer shell 1 and the outer shroud 4 can freely be determined by arbiterily controlling the gaps and the grooved forms in the labyrinth seal, which is constituted by a disk 17 having grooves, provided to the outer shell 1, and a disk 18 having grooves, provided to the outer shroud 4. Accordingly, excessive thermal stress caused by the difference in the quantity of expansion and contraction due to the change in temperature in the parts of a heat exchanger is prevented. In addition, the fluid on the primary side is prevented from being mixed with the secondary fluid, by providing the labyrinth seal between the outer shell 1 and the outer shroud 4. |
