A locomotive heat exchanger apparatus includes a header having at least one opening, at least one tubular member joined to the header and having an interior passageway in fluid communication with the at least one opening, and a plurality of radial fins extending from the at least one tubular member. The tubular member and the plurality of radial fins may be formed as a unitary component via additive manufacturing without welding or interference fit.

Embodiments provide a helical layer structure including: a helical core member which is formed of a flexible, lengthy, flat plate-like core member and which is formed of a steel plate made of a metal material, such as iron; and a polymeric coating layer which is formed of a polymeric material such as a thermosetting elastic material or a thermoplastic elastic material, and which coats the helical core member. The manufacturing method of the helical layer structure includes: a feeding step of feeding a core member having flexibility; a supply step of supplying the polymeric material having fluidity; a coating step of coating the core member with the polymeric material; a cooling step of cooling a coated intermediate which is coated with the polymeric material; and a helix formation step of helically twisting the coated intermediate to form the helical layer structure.

A flat tube for a heat exchanger, with two open ends defining its longitudinal direction, comprising a first wall and a second wall which are flat and parallel to each other, thereby delimiting the inner space of the tube, and further comprising an inner fin located between the first and the second walls, wherein one of the lateral sides of the first wall comprises a main fold running along the longitudinal direction, wherein arms of the main fold form a slit facing the inner space of the tube, and the lateral side of the second wall is bent to cover the main fold.

The system and method for installing external corrosion guards of the present disclosure comprises a method of protecting tubing in tubular heat exchangers from external corrosion that includes the installation of protective collars or guards around the tube outer diameter at the tubsheet plate, anti-vibration baffle, and/or pass partition plate levels. The external corrosion guards can be installed using a ridge method, where a ridge sits on a plate level, using a mechanical expansion method, and using a mechanical rolling method.

The invention relates to a fluid channel for a heat exchanger, comprising a metal sheet, wherein the metal sheet has at least one core region of an aluminum base alloy and at least one structure arranged inside the fluid channel, wherein the structure lies against a surface of the metal sheet and can be soldered to the metal sheet in a flux-free manner by way of a first soldering location in a soldering operation, and wherein a soldering region of the metal sheet and a counterpart lie against one another and can be soldered to one another in the same soldering operation as a second soldering location while wetting with flux, wherein an open path between the two soldering locations exists before the soldering operation.

A device for forming inside three-dimensional finned tube by multi-edge ploughing and extruding, comprises a machine frame, a machine head, a supporting mechanism, an axial feeding mechanism and a cutter assembly for forming inside fins. The machine head, the supporting mechanism and the axial feeding mechanism are axially mounted on the machine frame in sequence. The cutter assembly for forming inside fins is mounted on the feeding mechanism. One end of a metal tube to be machined for forming inside three-dimensional fins is clamped on a chunk of a rotary main shaft of the machine head, and the other end thereof is placed on the supporting mechanism. The rotary main shaft of the machine head provides the rotation power for the metal tube, and the axial feeding mechanism drives the cutter assembly to move linearly along a coaxial line of the metal tube and the cutter assembly.

A method for producing a heat exchanger may include adhesively bonding at least two components to one another and applying an adhesive layer to an outer side of at least one of the at least two components.

Embodiments provide a helical layer structure including: a helical core member which is formed of a flexible, lengthy, flat plate-like core member and which is formed of a steel plate made of a metal material, such as iron; and a polymeric coating layer which is formed of a polymeric material such as a thermosetting elastic material or a thermoplastic elastic material, and which coats the helical core member. The manufacturing method of the helical layer structure includes: a feeding step of feeding a core member having flexibility; a supply step of supplying the polymeric material having fluidity; a coating step of coating the core member with the polymeric material; a cooling step of cooling a coated intermediate which is coated with the polymeric material; and a helix formation step of helically twisting the coated intermediate to form the helical layer structure.

A heat exchanger includes a spine fin strip wrapped onto a conduit in a helical pattern. A first plurality of spine fins of the spine fin strip extends from a base of the spine fin strip, and a second plurality of spine fins of the spine fin strip is bent relative to the spine fins of the first plurality of spine fins. A related method for forming a heat exchanger is also provided.

In a method for the production of a heat exchanger, a turbulator insert is placed into a heat exchanging tube, with the turbulator insert having a solder applied thereon in at least one region. Weld spots using resistance welding are formed on an inner surface of the heat exchanging tube with the turbulator insert, and the inner surface of the heat exchanging tube is interlinked with the turbulator insert through brazing.