Mtu Motoren-und Turbinen-union Munchen Gmbh

Motoren- Und Turbinen-union Munchen Gmbh

Mtu Motoren-und Turbinen-union Muenchen, Gmbh

Mtu Motoren-und Turbinen-union

Klaus Hagemeister

Alfred Hueber

Bernhard Wohrl

Axel Rossmann

A heat exchanger having two parallel manifold ducts that communicate with one another through a matrix of several rows of heat exchange tubes, in which a number of sheet metal tray members placed on top of one another form the rows of tubes. Two complementary sheet metal tray members are joined to one another each having a number of parallel longitudinal slots that are interrupted by webs. The heat exchange tubes are formed by opposed trough-shaped portions formed between the slots of the joined complementary tray members.

Heat exchanger formed from superimposed trays

A tube matrix for a heat exchanger is connected between two spaced ducts for conveying a fluid from one duct to the other. The tube matrix has a plurality of spaced heat exchange tubes whose ends are secured to the ducts and which have a generally S-shape between the ducts. At the points of lateral offset and at the intermediate point therebetween, spaces are provided for keeping adjacent tubes in spaced relation from one another. Each loop of the S-shape tube is formed with two successive sections each of which includes two segments of opposite curvature such that in all there are eight segments which make up the tube. Preferably, the tube is a one piece member and the shape is formed by bending the tube. At each of the points where the tubes are secured and are connected by the spacers, tangents to the tubes extend parallel to one another.

Curved tubes of a heat exchanger

A heat exchanger having an inlet duct for admission of a first fluid to be heated, an outlet duct for discharge of the first fluid after heating thereof, the ducts being arranged in substantially parallel relation, and an assembly of a plurality of heat exchanger tubes connected to the inlet and outlet ducts for receiving the first fluid from the inlet duct to convey the first fluid through the tubes for discharge into the outlet duct. The heat exchanger tubes are of U-shape each including a curved bend region in which reversal of direction of flow of the first fluid is effected. The assembly of heat exchanger tubes extends laterally of the ducts into the path of travel of a second fluid which flows around the tubes in a passage area to effect heat exchange with the first fluid in the tubes. In order to promote heat exchange in the curved bend region of the tubes, the tubes are arranged in a plurality of separate groups adjacent to one another lengthwise of the ducts and the tubes in each group converge towards one another in the curved bend regions to reduce the passage area thereat for the flow of the second fluid around the tubes.

Heat exchanger and associated method

A method for manufacturing a tubular distributor of a heat exchanger in which the distributor is formed by layers of material between which the ends of heat exchange tubes of a matrix are secured in fluid-tight manner. The layers are made of fibers which are juxtaposed between the tube ends of adjacent rows and the layers are deformed by compression so that they each engage around one-half of the associated row of tubes to form an initially porous structure into which a metallic material is injected to integrate the fibers of the layers with one another and with the ends of the tubes in sealed relation.

Method of producing a tubular distributor of a heat exchanger from

A heat exchanger having a matrix of tubes around which hot gases flow, the matrix comprising spaced internested oval profiled tubes connected to a manifold for supply of compressed air to the tubes. The manifold is composed of a plurality of superimposed elements assembled on another in fluid-tight fashion. The profiled tubes have rectangular or square base ends which are fitted into corresponding openings in the superimposed elements.

Heat exchanger

A heat exchanger having first and second ducts respectively for the supply of compressed air to be heated and for the discharge of heated compressed air. A tube matrix includes first and second branches respectively connected to the first and second ducts for conveying compressed air from the first duct to the second duct. The tube matrix is exposed to the flow of hot gases therearound to heat the compressed air conveyed in the tube matrix. A plate heat exchanger connects the first and second branches of the tube matrix to convey the compressed air from the first branch to the second. The plate heat exchanger is formed by spaced plates between which the hot gases flow, each plate being connected to rows of tubes of the matrix in the first and second branches and forming a flow chamber in which the compressed air can be conveyed.

Reversal chamber for a tube matrix of a heat exchanger

A heat exchanger having an inlet duct for admission of a first fluid to be heated, an outlet duct for discharge of the first fluid after heating thereof, the ducts being arranged in substantially parallel relation, and an assembly of a plurality of heat exchanger tubes connected to the inlet and outlet ducts for receiving the first fluid from the inlet duct to convey the first fluid through the tubes for discharge into the outlet duct. The heat exchanger tubes are of U-shape, each including first and second straight leg portions respectively connected to the inlet and outlet ducts and a curved bend region connecting the straight leg portions for reversing the direction of flow of the first fluid from the first leg portion to the second leg portion. The assembly of heat exchanger tubes projects laterally of the ducts into the path of travel of a second fluid which flows around the tubes in a passage area. The heat exchanger tubes are arranged in a matrix of rows and columns in which the straight leg portions of the tubes are spaced apart a greater distance than the spacing between the curved bend regions of the tubes.

A brush seal for first and second spaced, adjoining members which are capable of undergoing universal relative displacement, the seal comprising a plurality of flexible bristles having opposite ends, one of which is secured in a clamp causing the bristles to fan outwardly towards the other end. The second member supports a joint defining a space with a throat into which the fan of bristles enter and are resiliently squeezed at the throat. The free ends of the bristles are spaced for free movement in the joint lengthwise of the bristles to accommodate relative movement of the members towards and away from one another. Relative movement of the members longitudinally in their respective planes in taken up by sliding of the bristles within the joint while relative movement of the members transversely in their respective planes is taken up by bending of the bristles at the throat. In the case of all relative movement of the members, the bristles maintain sealing contact with the joint at the throat.

Brush seal

Apparatus for effecting heat exchange between first and second fluids in a heat exchanger in which a first fluid is conveyed through a plurality of spaced U-shaped tubes assembled in a matrix of the heat exchanger, and a second fluid is conveyed around the tubes of the matrix in a direction perpendicular to the matrix so that heat exchange takes place between the first and second fluids. The U-shaped tubes have bends facing a guide wall of the heat exchanger and form a gap therebetween to permit relative movement of the tubes and the guide wall, for example, due to differential thermal expansion and vibration. Flow of the second fluid through the gap is blocked by a resilient sealing element which resiliently accommodates the relative movement of the tubes with respect to the guide wall and damps vibration. The sealing element can be a flexible mat of elastic metal felt.

Apparatus for sealing the leakage gap between the U-shaped bends of a

An aerodynamic radial bearing has two foil sections located in a gap between an outer bearing shell (1) and the bearing shaft. The foil sections encircle or loop around the bearing shaft in several layers and include an inner foil section and an outer foil section. Each section may have one or several foil or band portions. The inner foil section closer to the shaft forms the bearing running surface and the outer foil section closer to the shell wall forms a support of predetermined elasticity or desired stiffness. The outer end of the outer foil section is secured to the bearing shell. At least one foil or band portion of the inner foil section is wrapped in opposition to the direction (D) of rotation of the shaft (2) and is connected (at 5, 10 11) to at least one further foil or band portion of the outer foil section which is wrapped in the direction (D) of rotation of the shaft (2). These features eliminate the troubles encountered heretofore in operation of such bearings due to contaminant particles since these particles can no longer accumulate in the running gap.

Aerodynamic radial bearing

A method for producing a collector vessel or manifold of a heat exchanger wherein the collector vessel is tubular and composed of a plurality of superimposed annular rings which are formed with recesses for receiving heat exchanger tubes of a matrix. The method comprises producing the annular rings from strips of predetermined profiled cross section by cutting the strips to predetermined length and rolling or coiling the strips and closing the rings by welding together their open ends. Thereafter a local displacement of material is achieved by rolling each of the closed rings and, in a subsequent rolling operation, in the plane of the ring, the material is deformed to produce recesses for the matrix tubes.

Method for mass producing superimposed annular elements of a tubular

A heat exchanger as well as a method of manufacturing the same, in which the heat exchanger bottom is constructed thermo-elastically flexible in a layered manner of construction taking into consideration the rigidity requirements thereof; each layer has two complementary sheet metal shells which are equipped with predeformations for the connections or enclosure of matrix profile ends as well as for the mutual joinability of the layers.

Heat exchanger for gases of greatly different temperatures

A self-acting gap seal for a gap existing between individual modules of a composite, annular pressure vessel comprising a flat, thin-walled seal element on the inside of the pressure vessel to bridge the gap plus the circumferential region adjacent the gap. Internal pressure urges the seal element against the inner wall of the vessel to close and seal the gap to prevent exit of the pressure medium in the vessel.

Self-acting seal between adjacent pipe ends of a pressure vessel

A heat exchanger comprising an assembly of spaced heat exchanger tubes of U-shape having inlet ends for receiving an operating fluid and outlet ends for discharge of the fluid, the fluid flowing through the tubes and undergoing flow reversal in the U-shaped portions. The tube assembly is mounted in a housing having an inlet for a second fluid for flow across the tube assembly to undergo heat exchange with the fluid flowing in the tubes and an outlet for discharge of the second fluid. The housing has an opening in which the U-shaped portions of the tubes extend for free displacement relative to the housing. A guide wall surrounds the tubes at the U-shaped portions and is connected to the housing to cover the opening therein. The guide wall is shaped to conform to the U-shaped portions of the assembly and rests on the outer tubes of the tube assembly in floating relation. At its opposite ends the guide wall is engaged with the housing so as to be relatively movable and follow the movements of the tubes on which it rests such that the assembly is freely movable relative to the housing and the tubes are relatively movable with respect to one another.

Guide wall of a heat exchanger for covering the U-shaped portions of a

A heat exchanger comprising a field of profiled tubes arranged in vertical columns and horizontal rows, each profiled tube being of oblong shape and, at least in part, surrounded by at least two supporting profile strips extending in the direction of fluid flow. The profiled strips of adjacent profiled tubes in a column are held at their ends in a well-defined position. Furthermore, the profile strips can rest directly or indirectly on other profile strips, adjacent thereto at the left or right, of adjacent profiled tubes. In this way, individual profiled tubes are longitudinally displaceable in an exact field arrangement and can compensate for changes in length.

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Munich, Germany

Klaus Hagemeister