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AssigneeApparatebau Rothemuhle Brandt & Kritzler
InventorsErnst Puritz, Erich Kraft
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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.
Rotary regenerative air preheater with a cylindrical regenerative mass having a central axis and end faces, sealing elements adjacent, respectively, the end faces of the regenerative mass, the sealing elements being operatively linked to spring loaded pin means adapted for travel in the axial direction of the mass and respective stops defining a limit to the travel of the respective pin means, a temperature responsive device at each end face of the mass, each stop being operatively linked to a respective temperature responsive device through a lever linkage including a crank means, the crank means being borne on a support for pivoting about a pivot axis, the temperature responsive devices being attachable to the crank at any one of a plurality of distances from the pivot axis, and being responsive to alter its length with alteration in temperature to adjust axially the position of said stop, the device at one end of the mass being arranged to cause said stop for the sealing element at that end to move in a given axial direction upon temperature rise and that at the other end of the mass being arranged to cause said stop for the sealing element at that end to move in the same axial direction on temperature rise, both stops being moved in the opposite direction on temperature fall, the directions bein appropriate to the axial movement of the mass with temperature change.
Dependencies are inferred from the claim text.