This paper gives an outline of the design and development of the 750-b.h.p. prototype glandless boiler circulating pump to be commissioned at Kingsnorth Power Station. Suction conditions of 2650 lb/in2 (gauge) and 650°F demanded special techniques for the maintenance of safe motor winding temperature levels under all types of operation. Constructional details of the high-pressure casings and the rotor system, employing water-lubricated bearings, are discussed, together with those of the auxiliary cooling system. Comprehensive prototype tests were carried out to prove the principal design features. Particulars of the test rigs used and the results obtained from them are given.
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References
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