. American engineer and railroad journal . plates, inwhich are cast chambers or passages for lessening the noise,and increasing the efficiency of the machine, as is explainedlater. On either side of the housing are openings for the in-take and the discharge of the air, flanged and tapped for stand-ard gas pipe fittings; the small sizes have openings at thesides, and the large blowers openings at the top and every respect the casing and rotors are symmetrical, per-mitting the blower to run in either direction. Except in blow-ers of large size, the lower half of each journal box is cas
. American engineer and railroad journal . plates, inwhich are cast chambers or passages for lessening the noise,and increasing the efficiency of the machine, as is explainedlater. On either side of the housing are openings for the in-take and the discharge of the air, flanged and tapped for stand-ard gas pipe fittings; the small sizes have openings at thesides, and the large blowers openings at the top and every respect the casing and rotors are symmetrical, per-mitting the blower to run in either direction. Except in blow-ers of large size, the lower half of each journal box is cast inone piece with the cover plate, insuring rigidity, simplicityand correct alignment. When it is desired to maintain abso-lutely constant pressure, the blower is provided with a reliefvalve, or automatic governor. For transferring gases and airat high-pressure stuffing boxes are provided for the shafts,and a drain in the bottom removes tar and other distilledliquids. OPERATION. Air at atmospheric pressure entering the blower at the in-. DETAILS OF STURTEVANT HIGH PRESSURE BLOWER. Continued rotation carries the rotors to the position shownin Fig. 3; air at atmospheric pressure is now entering pocketF, the air in D is being carried around between the bladesA and B in the annular space, and E is discharging. Abovethe impeller the remaining pressure in Z is being transmittedto the air in X by means of the leakage passage N providedfor the purpose, thereby making its pressure slightly greaterthan atmospheric. The air in space Y under slight pressurefrom previous leakage is imprisoned and being carried aroundby the idler. When the fourth position is reached pocket F will be filling, 78 AMERICAN ENGINEER AND RAILROAD JOURNAL. the -pressure in chamber Z will have been reduced to atmos-pheric by leakage, space Y will discharge, and a little com-pressed air from the delivery pipe will flow back throughleakage passage M and increase the pressure in D, which willresult in a quieter disch
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroadengineering
