Abstract: Apparatus for removing solids such as iron oxide pellets and fines from the rotating water seal trough of an annular material cooler by periodically operating an air ejector pump, which is suspended in the trough and operated at predetermined intervals and for a predetermined time; the ejector pump has associated with it a sensing apparatus both being pivotally mounted and suspended within the trough; an abnormal build-up of pellets and fines in the trough or large foreign bodies within the trough is sensed by the sensing means which actuates emergency means to override the normal pump operating cycle and maintain the pump operating and simultaneously alerting personnel to the emergency condition.

Abstract: A seal for gas channels of a regenerative heat-exchanger with respect to the interior space of the housing surrounding gas channels and a storage body, which consists of a sealing bar that abuts with a slide layer at the storage body and of a sealing diaphragm which is supported at a support member provided with covered off notches and which extends obliquely over the gap between the sealing bar and the oppositely disposed housing wall and abuts at the housing wall with its upper edge projecting beyond the sealing bar; the support member thereby forms an acute angle in cross section whose one leg abuts flat at the sealing bar and is secured thereat only within the area of its edge opposite the angle apex, whereas a sealing diaphragm is secured to the other obliquely extending leg at the inside within the area of the angle apex which is assembled of individual sealing lamellae that mutually overlap between two notches of the support member and that, within the area of their overlap, are pressed against the sup

Abstract: A member including a metal substrate, a low wear coating formed by flame spraying a mixture of a wear resistant metal oxide such as nickel oxide and a solid lubricating material such as calcium fluoride to serve as a high temperature rubbing contact seal layer and at least one undercoat layer formed by flame spraying between the substrate and the surface layer, characterized by the presence of a metal in at least one of the undercoat layers mixed with a commonly employed fundamental material, which is the wear resistant metal oxide optionally with the addition of the solid lubricating material, in order to lessen the difference in thermal expansion coefficient between the individual undercoat layer and the surface layer.

Abstract: Friction shoes are placed end-to-end to define a closed shape around a sector on a disc-type matrix and located in a groove cut into a support having two groove walls that cooperate to define the groove therebetween. Each of the friction shoes is biased toward one of the groove walls by a springy plate to effect a seal contact with the one groove wall. A bellows is located on a housing enclosing the matrix and the support.

Abstract: An air preheater comprising a housing that encloses a cylindrical rotor carrying a mass of heat absorbent material alternately between a passageway carrying a stream of hot gas and a passageway carrying a stream of cooler air. Special axially disposed sealing means are disposed in the annular space between the rotor and the rotor housing to preclude fluid by-passing the heat absorbent material of the rotor.

Abstract: A sealing member for a rotary heat-accumulator type heat exchanger for a gas turbine engine, in which a hollow cover having a plurality of holes is provided between a sliding plate and a shield panel of a heat accumulator. Low-temperature, high pressure air is forced to flow through the holes of the cover into high-temperature air side of the heat accumulator, whereby portions of the sealing member are effectively cooled.

Abstract: A seal assembly for providing seal between an end face of a cylindrical and rotatable heat-transferring member and an opposite surface of a stationary member of the heat exchanger, having a loop-shaped and cross-sectionally rectangular seal member of a heat-resistant and rigid material, a loop-shaped groove formed in the surface of the stationary member to loosely receive the seal member, a loop-shaped back-up member of a resilient material tightly received in the bottom of the groove such that the seal member is sandwiched with a compressive force between the back-up member and the end face of the heat-transferring member, and a loop-shaped auxiliary seal member of a resilient material arranged to provide seal between the outer surface of the seal member and the outer wall of the groove and press the seal member against the inner wall of the groove.

Abstract: A rotary regenerative air preheater has electromagnetic drive devices to adjust the relationship between an end face of the regenerative mass and a sealing frame on a duct part. Electrical control means are responsive to signals generated by contact between the sealing shoe (or special sensors) borne on the frame and the end face, to drive the electromagnetic devices and break the contact. The control may be on/off, a time response such that a desired maximum clearance is experienced, or may be responsive to drag (i.e., the angle of arc over which contact is experienced). The electromagnetic drive devices are inherently self adjusted by having an air gap in their flux circuit which varies in dependence on the position of the sealing frame.

Abstract: A seal assembly comprising a seal member which is placed on an end face of a cylindrical and rotatable heat-transferring member by the support of connecting pins secured to a housing member of the heat exchanger, a support plate fixedly placed on a surface of the housing member opposite to and spaced from the end face of the heat-transferring member, and a resilient shield plate which is not joined with the seal member but is fixed at one end to the support plate to extend obliquely such that an acute angle is formed between the support plate and one side of the shield plate to be exposed to a fluid of a higher pressure, until its free end comes into contact with the seal member.

Abstract: A regenerative air preheater is disclosed comprising a heat exchanger including a power operated rotary heat exchanging unit and a surrounding stationary casing having opposite inlets and outlets for combustion air and flue gas defining two axial passageways for combustion air and flue gas, respectively, through the rotary heat exchanging unit, each such passageway being connected with its inlet and outlet in a duct for conveying a flow of combustion air or flue gas, respectively, through the heat exchanger, means being provided to conduct away from the flue gas outlet of the heat exchanger at least a major portion of any air passing from the combustion air passageway to the flue gas passageway during operation of the heat exchanger, and a branch duct being connected to the flue gas duct at a point located after the heat exchanger, as viewed in the direction of flow of flue gas through the flue gas duct, in order to allow flue gas to be drawn off from the flue gas duct for subsequent use as an inert gas.

Abstract: Rotary regenerative heat exchange apparatus having a horizontal rotor post about which there are secured a plurality of axially spaced layers of heat absorbent element through which a heating fluid and a fluid to be heated are alternately directed. The heating element is contained in a plurality of sector-shaped compartments in juxtaposed relation that are pivotally attached to the rotor post. Sealing means are designed to be inserted as radial strips that extend between adjacent compartments in frictional engagement therewith to preclude the flow of fluid through the space therebetween. The sealing means are independent from the rotor structure at all times to permit complete freedom of movement whereby the sealing means will find an optimum relationship intermediate the element compartments.

Abstract: An improved regenerative, high temperature gas, high efficiency heat exchanger has a heat absorbing rotor formed of a plurality of gas flow passages and a housing that includes partition columns for dividing the rotor passages into at least one high temperature and at least one low temperature duct. A two section drive shaft supports the rotor in the housing and pressure plates securely connect the rotor to the drive shaft. The rotor is of a size to provide an annular gas bypass channel between the rotor and the housing, which channel is greater than the hydraulic diameter of the rotor flow passages in order that bypass of gas through the channel provides a continual flushing of contaminants therefrom. To prevent leakage between the high and low temperature ducts through this annular channel, air curtains may be employed at the top and bottom of the partition columns.

Abstract: Rotary regenerative heat exchange apparatus having a rotor of heat absorbent material that is alternately exposed to hot and cold fluids in order that heat from the hot fluid may be transferred to the cold fluid through the intermediary of the heat absorbent material. The rotor is surrounded by a housing including sector plates that cooperate with a rotor post seal at opposite ends of the rotor to separate the several fluids. A unique support for the sector plate and the rotor post seal is adapted to move axially while permitting radial expansion effected by thermal variations of the rotor to provide an optimum sealing arrangement.

Abstract: A fume incinerator having a rotary heat exchanger with a novel seal structure therefor. A rotating rotary heat exchanger wheel is positioned in the mouth of a tubular incinerator having a closed end wall opposite to the rotary heat exchanger. A baffle extends from the heat exchanger wheel to a point spaced from the closed end of the incinerator so that the fume and air mixture, after passing through one side of the heat exchanger wheel, is passed through one side of the incinerator wherein it is heated to a temperature sufficient to oxidize the fumes in the mixture, passes around the end of the baffle to the other side of the incinerator and through the other side of the heat exchanger wheel. The fume and air mixture is preheated from the heat of combustion as it passes through the heat exchanger wheel. The heat exchanger wheel is axially tapered and a seal member surrounding the heat exchanger is likewise tapered in a complementary manner.

Abstract: An adjusting means for rotary regenerative heat exchange apparatus by which a sealing plate that lies adjacent an end of a rotor containing a mass of heat absorbent element is adjusted axially to maintain a closely spaced relationship whereby there will be a minimum clearance space to permit fluid leakage therebetween.

Abstract: A rotary regenerative heat exchanger including a rotatable disc-like matrix having an end seal comprising an arcuate portion and a diametral or chord-wise portion each comprising a pressure plate engaging the adjacent end face of the matrix and an axially-compressible resilient member acting between the housing of the heat exchanger and the pressure plate and defining a space internally of the seal portions communicating with a gallery defined by the housing and arranged to receive a pressurized fluid, the pressure plate of the transverse portion being compressively stressed between spaced parts of the pressure plate of the arcuate portion under cold conditions and the length of the pressure plate of the transverse portion being such that the pressure plates of the seal portions are substantially stress-free under hot working conditions.

Abstract: A sealing device located between a static surface of a gas turbine and a rotating heat exchanger surface is comprised of a plurality of outwardly opening U-shaped shoes sealingly connected to the static surface by a bellows and a plurality of U-shaped compression members telescopically disposed within the U-shaped shoes and biased outwardly into engagement with the rotating heat exchanger surface by a plurality of springs.

Abstract: A regenerative air preheater with cylindrical regenerator chamber and sealing frames at its axial ends with adjustable automatic thermal compensating devices for uniformly maintaining a constant sealing gap by adjustable means under different heat distortions of the regenerator chamber. The sealing frames are movable on spring-loaded pins and the axial travel of said frames is automatically equalized to the axial distortions of the regenerative chamber by said automatic thermal compensating devices in such a way, that they may follow the axial distortion movement of the regenerator chamber in a constant distance of a predetermined sealing gap, which had been adjusted, said compensating devices are controlled by their temperature-responsiveness, preferably in accordance with the mean temperature difference across the mass. As shown, they are made up by partially compensating thermal expansive devices, tied to a lever linkage with adjustable means.

Abstract: A seal device for use in a rotary type regenerative heat exchanger which is used for a gas turbine. This device consists of a seal-member urging mechanism adapted to urge the seal member against the flat surface portion of a heat-exchanger core, and a control mechanism which maintains a drive torque of a heat-exchanger core at an optimum value by operating the seal-member urging mechanism by comparison of a preset reference signal value with a signal of a value proportional to a drive torque required for driving the heat-exchanger core. The control mechanism further consists of a fluid pressure generating device such as for air or oil pressure and a mechanism for controlling the pressure within the fluid-pressure generating device.

Abstract: A regenerative air preheater is provided with a rotatable body mounted within a cylindrical casing. The rotatable body is formed by perforated discs mounted upon a shaft, and the casing is subdivided into passages for the air and the gas, respectively, by means of rows of rod members fitted between the discs and extending radially inwards from the casing towards the shaft.

Abstract: A sealing arrangement for a rotary regenerative air preheater that precludes the leakage of gas or air through the clearance space between a cylindrical rotor shaft and an end plate of a relatively fixed surrounding housing structure. The sealing arrangement includes an annular flange concentrically fixed at one end to the rotor shaft and adapted to extend into spaced relation with the housing structure to provide a clearance space therebetween. The clearance space is adapted to carry a plurality of discrete bands of packing material with a pressurized air seal therebetween to resist the flow of fluid therethrough, while the annular flange is subjected to wear and attrition that would otherwise be imposed upon the rotor post.

Abstract: A sealing element between the storage body and a gas channel of a regenerative heat-exchanger, which consists of a slide layer of graphite, of a metallic support bar and of a connecting layer disposed therebetween; the support bar includes a bottom portion and two side portions which laterally surround in part the slide layer whereas the connecting layer is applied to the inner sides of the bottom portion and the side portions with the slide layer embedded in the connecting layer.

Abstract: A rotary storage heat exchanger structure for multi-shaft gas turbines, especially motor vehicle gas turbines. The same is arranged in a housing and is provided with one or more rotatable disc-shaped storage bodies having flow passages which extend substantially parallel to the axis of rotation of the storage body or bodies. There are hot exhaust gases and colder compressed working air passed through the passages. The storage body or each of the storage bodies is journaled in a housing web in an overhung position or is journaled at two bearing areas in a housing web or in a housing web and another structural part of the gas turbine. In spaced relationship to the storage body, nozzle gap means are provided on or in the housing in the extended plane separating the working air flow and exhaust gas flow play is provided between the storage body and the pertaining housing web and the inner working air and exhaust gas flow conducting devices.

Abstract: Fixed seal means partition a disc type rotary regenerator for an automotive gas turbine engine into an inlet air heating section for conducting cool high pressure inlet air therethrough in one axial direction and an exhaust cooling section for conducting hot low pressure exhaust gas therethrough in the opposite axial direction. The seal means comprises a non-rotatable rubbing seal having an inner surface in sliding sealing engagement with an axial end surface of the regenerator and also comprises a channel shaped non-rotatable static seal having one channel side in sliding sealing engagement with a movement limiting stop fixed with respect to an outer surface of the rubbing seal at the low pressure side thereof and having a second channel side in sliding sealing engagement with a fixed housing portion of the engine.

Abstract: A three part seal assembly for sealing the rotatable disk regenerator of a gas turbine engine is disclosed. Each part of the seal assembly generally includes a base having one side carrying low friction means for engaging the regenerator and another side carrying a spring mechanism for making sealing contact with a surface on the engine housing and urging the low friction means into sealing engagement with the regenerator. One part of the seal assembly is in the form of a linear crossbar having a spring mechanism including generally parallel, longitudinally extending spring and retainer members. Each of these members has a first portion affixed to the base and a second portion extending away from the base in cantilever fashion. The cantilevered, second portions of the spring and retainer members are in parallel, spaced-apart relation.

Abstract: A rotary heat-exchanger comprising a control device which is controlled by the variable pressure of one of the two hot and cold gas flows, the control device exerting a force on the rotor which force is proportional to the resultant gas flow pressure, in order to maintain a fixed axial position of the rotor with respect to the rotor housing.

Abstract: A fume incinerator having a rotary heat exchanger with a novel seal structure therefor. A rotating rotary heat exchanger wheel is positioned in the mouth of a tubular incinerator having a closed end wall opposite to the rotary heat exchanger. A baffle extends from the heat exchanger wheel to a point spaced from the closed end of the incinerator so that the fume and air mixture, after passing through one side of the heat exchanger wheel, is passed through one side of the incinerator wherein it is heated to a temperature sufficient to oxidize the fumes in the mixture, passes around the end of the baffle to the other side of the incinerator and through the other side of the heat exchanger wheel. The fume and air mixture is preheated from the heat of combustion as it passes through the heat exchanger wheel. The heat exchanger wheel is axially tapered and a seal member surrounding the heat exchanger is likewise tapered in a complementary manner.

Abstract: A seal assembly comprising a seal element mounted on an interior wall of a casing having a porous carbon sealing face, and urging means to urge the seal element into sealing engagement with an adjacent end of a rotary heat accumulator rotatable within the casing.

Abstract: Rotary disc regenerator, and regenerative air-cooled gas turbine engines embodying the same, characterized by non-rubbing seals which are effective to minimize air-to-exhaust leakage and make it possible to employ a sheet metal matrix as the heat exchange means of the regenerator.

Abstract: A seal system for a rotary regenerator with a circular ceramic regenerator core, the seal system including a peripheral portion sealingly engaged with the margin of the core and a cross arm portion extending generally diametrically across the surface of the core, the peripheral seal portions on the cross arm portion being located in seal recesses formed in the gas turbine housing during the casting of the housing thereby forming a portion of the housing assembly, the seal portions being made in segments whereby provision is made for reducing or eliminating seal breakage and maintenance cost.