GB190814839A - Improvements in Rotary Engines. - Google Patents

Abstract

14,839. Towlson, E., and Kahn, E. July 13. Fixed-abutment type. The piston vanes carried by the drum are formed as cylindrical rollers working in slots, and may be fluid-pressed. Valve arrangements and packing-devices are described. The cylindrical pistondrum a works in an elliptical casing b provided with two spring-pressed abutments x, and has axial grooves f accommodating piston rollers g. The rollers may be pressed against the casing by rods k<1>, Fig. 6, acted on by separate plungers k subjected to steam pressure. In a modification, Fig. 1, the slots in which the plungers k work are radial, and the actuating-fluid is supplied through a hole n in the shaft. The supply may be cut off when the speed is high enough for centrifugal force to be effective in keeping the rollers out. Steam is led to the working chamber from the pipe S by passages 35 in the casing, passages 25 in a stationary ring 33, and ports 24 in the.drum which communicate with the slots f, whence the steam passes to the working chamber by openings 27 behind the rollers. Exhaust pipes 28 are provided. The rings 33 may act as reversing and cut-off valves, and may be made rotatable by external means to vary the cut-off. Disk-extensions 36 are bolted to the ends of the drum a, the joint between them and the stationary part b<1> being packed with rings 40. Recesses 37 contain plates 38 pressed by springs against the ends of the rollers g to pack them. The spring- pressed abutments x are preferably of cast iron and in two parts separated by springs. They are recessed on each side, and holes are provided in them to equalize the pressures. The rollers g are preferably hollow and made in two lengths. In a modified form of engine which is reversible, steam is not admitted through the drum but through casing ports w, Fig. 4, controlled a pair of valves 3. Steam enters at u and exhausts at 4, or it may exhaust through the centre 5 of the valve 3, Fig. 1. As shown in Fig. 1 spring-pressed packing-rings 14, 15 are in this case arranged on one end face of the drum a, and packing-rings 18 are arranged on the other end in a member 17 held to the casing by screws 19, and adjusted in position by a nut 21.