GB390918A - Improvements in and relating to the control of auxiliary machines in power plants - Google Patents

Abstract

390,918. Reversing; pumps. BRITISH THOMSON-HOUSTON CO., Ltd., Crown House, Aldwych, London, JEWITT, D. E., 17, Hillmorton Road, and HALL, J. 1., 49, Crick Road, Hillmorton, both in Rugby. Feb. 8, 1932, No. 3729. [Classes 7 (ii) and 7 (v).] In a ship propulsion system provided with a generator driven directly by or mechanically coupled to the propeller shaft, the current from the generator being used to actuate the main engine auxiliaries, such as pumps and blowers, the generator is controlled by automatic switch gear so that the auxiliaries always run in the same direction irrespective of the direction of the rotation of the engine. A Diesel engine 1 has an alternating-current generator 3 mounted on the propeller shaft 2 and utilized to drive auxiliaries, such as a scavenging or supercharging blower 6 driven by a polyphase motor 7 and a circulating pump 8 driven by a motor 9. The supply to the motors 7, 9 is controlled by electromagnetically-operated contactors 10, 11 the operating coils 12, 13 of which take direct current from the mains 14. Current for the coils is controlled by a two-way switch 15 which is governed by the rotation of the propeller shaft so that, when the propeller is rotated ahead, the switch arm is in the position shown in full lines and energizes the coil 12 to close the contactor 10. According to the Provisional Specification, the reversing switch may be actuated by the main reversing lever or by a lever interlocked therewith.