Method and tool for making enhanced heat transfer surfaces

Details Method and tool for making enhanced heat transfer surfaces Method and tool for making enhanced heat transfer surfaces

F - Mech Eng,Light,Heat,Weapons

28

F

F28F 1/40 (2006.01) B23P 15/26 (2006.01)

Patent

CA 2543480

The invention relates to enhanced heat transfer surfaces and methods and tools for making enhanced heat transfer surface. Certain embodiments include a boiling surface that include a plurality of primary grooves, protrusions and secondary grooves to form boiling cavities. The boiling surface may be formed by using a tool for cutting the inner surface of a tube. The tool has a tool axis and at least one tip with a cutting edge and a lifting edge. Methods for making a boiling surface are also disclosed, including cutting through the inner surface of a tube to form primary grooves, then cutting and lifting the inner surface to form protrusions and secondary grooves.

L'invention concerne des surfaces d'échange thermique améliorées ainsi que des procédés et des outils de fabrication d'une surface d'échange thermique améliorée. Certains modes de réalisation comportent une surface d'ébullition pourvues d'une pluralité de rainures primaires, de protubérances et de rainures secondaires qui forment les cavités d'ébullition. La surface d'ébullition peut être formée au moyen d'un outil qui permet de découper la surface intérieure d'un tube. L'outil présente un axe d'outil et au moins une pointe ayant une arête de coupe et une arête de décollement. Par ailleurs, l'invention concerne des procédés de fabrication d'une surface d'ébullition, qui consistent d'abord à découper la surface intérieure d'un tube pour former des rainures primaires, puis, à découper et à relever la surface intérieure pour former des protubérances et des rainures secondaires.

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