Heat exchange – Casing or tank enclosed conduit assembly – Manifold formed by casing section and tube sheet of assembly
Patent
1997-05-20
1999-06-29
Lazarus, Ira S.
Heat exchange
Casing or tank enclosed conduit assembly
Manifold formed by casing section and tube sheet of assembly
165160, 165162, 165DIG416, F28F 902
Patent
active
059154721
ABSTRACT:
A lightweight apparatus designed to cool the EGR gas of an engine efficiently by replacing baffle plates with one or more support plates having a plurality of through holes, which is further made up of a barrel, end caps, a tube sheet, and a plurality of heat transmission tubes. An inlet and an outlet of the EGR gas are provided on the end caps covering both ends of the barrel and the sheet metal-made tube sheet attached to both ends of an inner wall of the barrel holds the properly arranged heat transmission tubes inserted into the through holes. Each metal sheet-made support plate affixed to a number of spots on the inner wall of the barrel has a diameter a little larger than the inside diameter of the barrel so that its edge is bent inward to fit inside the barrel tight but slidably in the form of tongue-like pieces. In a similar way, a peripheral edge of each through hole is curled up to create another set of tongue-like pieces to fit tight but slidably outside the heat transmission tubes. These pieces enable each support plate to be set at a specified position inside the barrel and their frictional resistance exerts sufficient pressure to secure the support plate steadfastly and durably to the inner wall of the barrel to withstand vibrating environments. Brazing to augment this frictional fixation is preferable. There is a separate circulating route for a cooling medium as well.
REFERENCES:
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patent: 4834173 (1989-05-01), Weiss et al.
patent: 5181561 (1993-01-01), Ayers et al.
patent: 5255737 (1993-10-01), Gentry et al.
Miyauchi Yuji
Takikawa Kazunori
Yamoto Seiji
Budzyn Ludomir A.
Casella Anthony J.
Hespos Gerald E.
Lazarus Ira S.
McKinnon Terrell
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