Patent GB-1111523-A (GB)
Title: An engine for the continuous displacement of a liquid
IPC: F02K7/00
Filed: 1965-05-04
Abstract: 1,111,523. Water jet-propulsion apparatus. KEMENCZKY ESTABLISHMENT. 4 May, 1965 [4 May, 1964; 12 May, 1964(2)], No. 18805/65. Heading B7V. [Also in Division F1] Water jet-propulsion apparatus for a water borne craft comprises a plurality of fixed tubes 40, Fig. 6, from whence water received through openings 31 in a casing 1a is periodically and sequentially ejected by hot gases generated in a chamber 55 by combustion of fuel injected through nozzles 90, the water leaving said tubes being discharged from the casing through a convergent chamber 110 to effect a propulsive thrust. The apparatus is immersed in the water of flotation and attached to the craft by a hollow mounting 1d. Water is drawn through the openings 31 by a centrifugal pump 51 in a unit that includes a rotatable hollow shaft 60 carried by bearings 62, 63 and driven by a turbine rotor 58, which is rotated by the water entering the chamber 110 from the tubes 40. Air for fuel-combustion purposes is inducted through a passage 44 and the shaft 60 by a further centrifugal pump 53, the air being expelled through slots 70 adjacent the pump 53 to mingle with the incoming water. The air and water are separated from each other by centrifugal action when they enter a chamber 71 abaft the pump 51, the water forming an annular wall externally of the air. The fuel injected into the air is ignited by a spark-plug 92 and the combustion products are directed into the tubes 40 by a pair of divergent channels 56 that are attached to the shaft 60 and extend through the annular wall of water. When one or other of the channels 56 comes into register with any one of the tubes 40 the water therein is ejected by the combustion products. the tube being subsequently re-charged with water from said annular wall when the channel passes into register with an adjacent tube. The walls of the tubes 40 are of helicoidal configuration to give the ejected water a tangential component of velocity that is dissipated by rotor 58. The apparatus may be started by an electric motor lodged in a chamber 83. The apparatus may be modified so that expulsion of the water in the tubes 40 is effected by steam flowing through the passage 44, the shaft 60 and branch passages (155), Figs. 11 and 13 (not shown), the chamber 90, the pump 53 and the channels 56 being dispensed with. In another embodiment, Fig. 1, fuel injected through a nozzle 19 is ignited by a spark-plug 20 and burns in air supplied through a pipe 11, the air being initially mixed with water entering the casing 1 and subsequently separated therefrom in a chamber 7 by centrifugal action. The water is inducted into the engine by a centrifugalpump 2 that is coupled to a turbine rotor 4 by a shaft 5. The products of combustion are directed into stationary helical tubes 6 by channels (18), Figs. 2 and 5 (not shown), which are defined by a shell 3 attached to the pump 2, so that water within said tubes is periodically and sequentially expelled therefrom through a convergent chamber 25. The apparatus is started by an electric motor 10. It is stated that the apparatus can be employed as a pump for liquids such as oil or water.