GB128419A - Improvements in and relating to Rotary Engines, Pumps, Blowers and the like. - Google Patents

Abstract

128,419. Bevington, M. Ling-. July 2, 1918. Movable-abutment type; cooling parts; packing drums, vanes, etc.; valves, distributing etc.; working-fluid supply. - Relates to rotary engines, pumps, and the like comprising a drum 4 with outwardly arranged radial vanes 14 alternating with vanes 13 projecting inwardly from a casing 1, 1<a>, in which the drum alternately over-runs, and is over-run by, the casing. In the construction of internal-combustion engine shown, the exhaust fluid passes radially outwards across sets of vanes 36 carried by the casing 1, 1<a> and through an impact wheel 44 geared to the casing. Rotary valves 21 mounted in the vanes 13 are operated by sun-and-planet gear to control the admission and exhaust of the working fluid in the spaces between the vanes, as well as a scavenging air-blast supplied by the fans F<1>, F<2>. Each casing-vane 13 has a fuel-supply passage 19, air cooling passages 15, 16 communicating at 17, 18, and a boring to receive the valve 21. Each valve is also formed with a main admission port 30, a main exhaust port 31, and ports 28, 29 serving alternately for admission and exhaust. Packing-strips 60 having oil passages 61, 62 are recessed into the vanes 13, and pressed against the surface of the drum 4 by springs 64. Each drum vane 14 has internal walls 72, 75, Fig. 7, braced by tubes 67, 68, leaving a space 71, 73, 76 which communicates through borings 74, 77 with the inner periphery of the drum 4. The rubbing surfaces of the vanes are packed by metal strips 82, 86, 93, Fig. 8, having oil passages &c. 89, 90 communicating by borings with annular passages 151 on the drum. The drum 4 is also formed with internal annular grooves 148, 149 from which lubricant is supplied to the passage 151, the ballbearings 2, and by passages 120, 121, 122 to the surface of a fixed drum 106. The latter is supported on the shaft 109 through the bearings 136. In the arrangement shown, lubricant is supplied by a pipe 172 and circulated by pumps P round the engine to the delivery-pipe 171. Each pump P, shown separately in Fig. 13, is of the same general type as the main engine, comprising a casing 154 with vanes 153 alternating with vanes 155 carried by a drum 156. Ports 161, 162, 163 co-operate with ports 123, 124 arranged around the reduced ends of the drum 106, the ports 123 at one end, and the ports 124 at the other end, leading by channels 126 to the annular passage 120 to supply the vane lubrication. The casing vanes are cooled by a fan F<1> driving air through the channels 15, 16, the drum vanes being cooled by a fan F<2> which also supplies air to the interior of the drum 106. This drum carries ferrules 114 adapted to register successively with apertures G in the drum 4 towards the end of the exhaust strokes for scavenging the working spaces between the sets of vanes. Figs. 3 and 4 show the gear for operating the valves 21. A sleeve 215 carries guides 212 for straps 211 of eccentric pins 209 which project from disks 202. The latter carry sprockets 221 which drive, through intermediate gears 223, sprockets 224 on the valve spindles. In the position shown in Fig. 2, A, C, I, E represent admission, compression, ignition, and exhaust as taking place in the respective spaces, four working cycles being effected during each revolution. The valve may be modified for a two-stroke engine or for operation by steam or compressed air.