US 5,332,410 AGranted

Shock resistant and temperature-strain resistant mounting for tubular particle filters

AssigneeForschungszentrum Julich GmbH

InventorsHelmut Heybutzki, Horst Stechemesser, Walter Renftle

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Abstract

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.

Claims10

Dependent claims

A mounting for a tubular particle filter, comprising first and second holders respectively adjacent to opposite ends of said filter, one of which holders contains a bore (7) for feeding or removal of gaseous or other fluid material to or from the inside of said tubular filter, and resilient fastening means on one of said holders by which the tubular filter, when mounted is subjected to a bias force which opposes loosening the mounting of said filter, wherein

said tubular particle filter is closed at its end adjacent to said first holder;
said first holder (1), instead of being rigidly fixed in place, is mounted by a spring attachment to a structure within which said closed end of said tubular filter (3) is mounted and said filter end adjacent to said second holder (2) is thereby pressed against said second holder (2) said structure within which said closed end of said tubular filter is mounted being a first wall of a gas duct,
said second holder (2) is mounted on a second wall of said gas duct opposite said first wall of said gas duct has a spherically curved surface (5) facing said filter end adjacent thereto and said same filter end fits snugly, with at least a circle of contact, against said spherical curved surface (5) of said second holder (2).

Dependencies are inferred from the claim text.