Forschungszentrum Julich Gmbh

Kernforschungsanlage Julich

Helmut Heybutzki

Wolfgang Krug

Walter Renftle

Johann Seferiadis

Horst Stechemesser

A tubular filter with porous silicon carbide for filtering particles of soot out of the exhaust gas of a diesel engine is mounted between two holders in a gas duct where one of the holders is spring loaded and the other has a bore that communicates with a bore connecting with the inside of the filter. The holders have surfaces facing the filter that are concavely spherical. The filter ends are provided with matching convexly spherical surfaces and they are directly on the filter ends or on an intermediate piece tightly seated on the filter end. The spherical surfaces are not necessary at the spring loaded holder and for some embodiments the holder can have a convexly spherical surface. The placing of the filter in a duct does not always permit the holders to be exactly opposite each other, but the filter mounting can be accommodated to somewhat offset holders because the gas tightness of the compression joints remain tight when the position of the filter is slightly oblique in the duct. The same tightness is preserved if for some reason the ends of the tubular filter are in planes that are not quite parallel to each other.

Shock resistant and temperature-strain resistant mounting for tubular

A pump for cryogenic liquids is provided with an enclosing vessel of the construction of a Dewar flask. A submerged multistage rotary pump is suspended from the mouth of the flask by means of a system providing thermal insulation opposing the flow of heat down the neck of the flask. The drive motor is coupled to the drive shaft of the immersion pump through a magnet coupling of which the elements are separated by a pressure seal. The latter and the extensive thermal insulation make the pump suitable for pumping liquid air or liquid nitrogen in a pressurized closed circuit and the presence of a supply of the cryogenic liquid around the pump itself makes it possible to start the pump at once after a quiescent period. A level-control sonde operates to assure that the presence of the necessary minimum of liquid in the vessel.

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Julich, Germany

Helmut Heybutzki