Brazing repair method for local leakage of core body of vacuum brazed aluminum plate-fin heat exchanger
A repair method and brazing technology, which is applied in the direction of welding/welding/cutting objects, welding media, hollow objects, etc., can solve problems affecting the production process, etc., and achieve the expansion effect of easy operation, easy coating, and avoiding leakage defects
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Embodiment 1
[0026] The core size of a certain type of coolant-air flow two-channel aluminum plate-fin heat exchanger is (length × width × height): 1440 × 150 × 488mm. The material of the side plate is 3003 aluminum alloy plate, the size is (length×width×thickness): 1440×150×4mm; the material of the fin is 3003 aluminum alloy plate, the thickness is 0.2mm, zigzag fin; the separator is Q515 aluminum alloy The cladding plate, the size is (length×width×thickness): 1440×150×0.8mm; the material of the seal is 3003 aluminum alloy, and the size of the airflow side cold seal is (length×width×height): 1440×8×3mm, cooling The size of the heat seal on the liquid side is (length × width × height): 150 × 12 × 9.5mm; the brazing material for brazing between the side plate and the fin and the seal is a 0.1mm thick 4004 brazing filler metal sheet, the size is (length × Width): 1440×150mm. The sealing test of the heat exchanger core after vacuum brazing found that there were 3 external leaks, all of which...
Embodiment 2
[0039] The core body size of a certain type of oil-air flow two-channel aluminum plate-fin heat exchanger is (length × width × height): 367 × 150 × 472mm. The material of the side plate is 3003 aluminum alloy plate, the size is (length×width×thickness): 367×150×6mm; the material of the fin is 3003 aluminum alloy plate, the thickness is 0.2mm, zigzag fin; the separator is Q515 aluminum alloy The size of the cladding plate is (length×width×thickness): 367×150×0.8mm; the material of the seal is 3003 aluminum alloy, and the size of the cold seal on the air flow side is (length×width×height): 367×8×3mm, engine oil The size of the side heat seal is (length × width × height): 150 × 12 × 9.5mm; the brazing material for brazing between the side plate and the fin and the seal is a 0.1mm thick 4004 brazing filler metal sheet, the size is (length × width ): 367×150mm. After the vacuum brazing of the core of the heat exchanger, the sealing test found that there was one leakage: it was loc...
Embodiment 3
[0048] The core body size of an aluminum plate-fin heat exchanger with two heat exchange channels for oil-air flow is (length×width×height): 427×102×190mm. The material of the side plate is 3003 aluminum alloy plate, the size is (length×width×thickness): 427×102×8mm; the material of the fin is 3003 aluminum alloy plate, the thickness is 0.2mm, straight fin; the separator is Q515 aluminum Alloy cladding plate, the size is (length×width×thickness): 427×102×0.8mm; the material of the seal is 3003 aluminum alloy, and the size of the airflow side cold seal is (length×width×height): 102×6×3mm, The size of the heat seal on the oil side is (length × width × height): 427 × 3 × 8mm; the brazing material for brazing between the side plate and the fins and seals is a 0.1mm thick 4004 brazing filler metal sheet, and the size is (length × width ): 427×102mm. The seal test of the heat exchanger core after vacuum brazing found that there were 3 leaks: 2 were located between the cold seal on ...
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