A tube-to-header sealing system for a heat exchanger comprises a pair of mating header plates, each header plate having a wall with a plurality of openings therein and including a continuous depression along the circumference of each header plate opening which forms one-half of an O-ring groove. Each of a plurality of O-rings is positioned in each O-ring groove and the header plates are secured together such that the header plate plurality of openings are aligned and trap each of the plurality of O-rings in O-ring grooves. A plurality of spaced-apart tubes each having a tube end secured in an opening in the wall of the header to form a tube-to-header joint are expanded outwardly to provide sufficient O-ring deformation to obtain a seal. In service, the resiliency of the O-ring seal allows for expansion and contraction of the tubes without the build-up of high stresses at the tube-to-header joint.

An apparatus (e.g., tube sheet) includes a plate piece, a sleeve piece, and a tube piece. The plate piece defines a hole. The sleeve piece has first and second ends; the second end is shaped to fit through the hole for attachment of the sleeve piece to the plate piece. The tube piece also has first and second ends. Inner and outer cross-sectional geometries of the tube piece and the sleeve piece (e.g., in the case of round tubes, inner and outer diameters) are shaped for the first end of the tube piece to fit in the first end of the sleeve piece and to form a continuous interior fluid flow path from the second end of the tube piece through the plate piece when the sleeve piece is disposed in the hole and attached to the plate piece and the tube piece is disposed in the sleeve piece.

The present invention relates to the field of fluid heat transfer, and discloses a heat transfer enhancement pipe as well as a cracking furnace and an atmospheric and vacuum heating furnace including the same. The heat transfer enhancement pipe (1) includes a pipe body (10) of tubular shape having an inlet (100) for entering of a fluid and an outlet (101) for said fluid to flow out; internal wall of the pipe body (10) is provided with a fin (11) protruding towards interior of the pipe body (10), the fin (11) spirally extends in an axial direction of the pipe body (10), wherein a height of the fin (11) gradually increases from one end in at least a part extension of the fin. The heat transfer enhancement pipe can reduce thermal stress of itself, thereby increasing service life of the heat transfer enhancement pipe.

A method for manufacturing a heat exchanger, wherein a firmly bonded connection is provided between tubes and ribs in order to form a radiator matrix, the connection provided by aligning and inserting tube ends into openings in a first and second collector in order to connect tubes to the two collectors, and a wall section of shaped tube ends is bent so that the tube ends are fixed against the collector through the wall section with interpositioning of a seal.

An automotive heat exchanger (10) has a heat exchanger core (12) including a header part (16) with a plurality of heat transfer tubes (38) and a head tank (20) with an opening receives end portions of the heat transfer tubes (38). A plastic header plate (18) is secured with the header tank (20) and header part (16). The header plate (18) includes a plurality of apertures (24) extending through the plate (18) that enable fluid passage. Each aperture (24) includes a cutout portion (28) that receives an end of a heat transfer tube (38). The cutout portion (28) has a complimentary shape to mate with the end of the heat transfer tube (30). A seal (50), in the cutout portion (28), seals the end of the heat transfer tube (28) with the header plate (18).

The invention relates to an heat exchanger possibly for exchanging heat within a vehicle. The heat exchanger includes a housing with an inlet port, an outlet port, an interior facing surface defining a coolant channel, a first opening surrounded by an exterior facing surface, and a second opening defined by a first inner diameter. A tube assembly defines a plurality of exhaust gas flow channels and a plurality of coolant cross channels within the housing. A first diffuser directs a first fluid into the tube assembly. The first diffuser is joined to the exterior facing surface, and this joint is sealed. A cap surface of the first diffuser encloses the first opening and caps the coolant channel. The first diffuser is joined to a first header plate, which separates the first fluid from a second fluid within the coolant channel. A second diffuser defines a directs the first fluid out of the tube assembly. The second diffuser is located within the second opening and sealed to the second opening by seals around the second diffuser. The second diffuser is not fixedly attached to the housing and can move within the second opening.

An automotive heat exchanger (10) has a heat exchanger core (12) including a header part (16) with a plurality of heat transfer tubes (38) and a head tank (20) with an opening receives end portions of the heat transfer tubes (38). A plastic header plate (18) is secured with the header tank (20) and header part (16). The header plate (18) includes a plurality of apertures (24) extending through the plate (18) that enable fluid passage. Each aperture (24) includes a cutout portion (28) that receives an end of a heat transfer tube (38). The cutout portion (28) has a complimentary shape to mate with the end of the heat transfer tube (30). A seal (50), in the cutout portion (28), seals the end of the heat transfer tube (28) with the header plate (18).

Embodiment of the present disclosure relate to an improved main header for an internal combustion engine radiator. In one embodiment, a main header for an internal combustion engine radiator has cut-outs and V-shaped notches provided at the four corners of the main header. The cut-outs and V-shaped notches release the stresses after the main header is flanged, thereby ensuring the flatness or straightness of the main header. The main header further includes one or more strengthening strips disposed along the length sides and the width sides of the main header, and optionally at the region adjacent to the cut-outs, to further enhance the flatness of the main header.

A heat exchanger for a method vehicle and a method of producing a heat exchanger are disclosed. The heat exchanger includes a heat exchanger block closed by a side part. The heat exchanger block has a tube bottom including a deformable hook, and the side part includes a tab provided complementary to a corner region of the tube bottom. The tab has a section, that abuts on a front side of the tube bottom, that includes a through opening or depression. A material portion of the hook is displaced through the through opening or depression via a graining in an assembled state, such that the axes of the through opening and the graining are offset and parallel to one another.

A cooling arrangement for a battery box includes a plate-shaped heat exchanging element, a cooling channel secured to the heat exchanging element, and a fluid collector for collecting or feeding a fluid into the cooling channel. The fluid collector includes a volume region and has a receiving opening on a side proximate to the cooling channel for introduction of the cooling channel to thereby fluidly connect the volume region with the cooling channel. A sealing element and a clamping element are arranged on an outside of the fluid collector at the receiving opening, with the clamping element being traversed by the cooling channel. A clamping tab is arranged above or below the receiving opening in surrounding relationship to the sealing element and the clamping element to thereby secure the cooling channel immovably to the fluid collector.