Patent GB-190807478-A (GB)
Title: Improvements in Pumps and Fluid Actuated Motors.
Inventor: JANNEY REYNOLD
Filed: 1907-06-15
Granted: 1908-06-15
Abstract: 7478. Janney, R. June 15, 1907. Revolving - cylinder pumps; stroke, varying.- Relates to pumps or fluid-actuated motors of the type wherein the pump cylinders are arranged in a rotating cylindrical body which discharges into and is fed from a central valve plate, the pistons being operated through a swash-plate of varying inclination. The invention consists mainly in rendering the action of such apparatus more uniform. Fig. 1 shows a shaft 3 carrying a cylinder barrel 29 which bears on the face of a valve plate 13. The plate 13 is provided with two ports 14, shown in Fig. 2, having sections at the end which are reduced in area, such as the V-shaped channels a, b, c, d, for the purpose of making the communication with the cylinder more gradual. The ports 32 of the cylinder 30 are smaller in area than the cylinders themselves, and are preferably lengthened in the direction of rotation. Rods 34 actuating the pistons 31 are secured at one end to the pistons and at the other to a socket ring 23, which is connected by a universal joint witb the shaft 3 and is carried by a pivoted swash-plate 20. The pistons and connecting-rods are provided with central passages to permit good lubrication of the rods. The socket ring is provided with a radial trunnion pin 36, shown in Fig. 9, and at the opposite side with an aperture for a trunnion pin 28, the outer end of which is secured by a conical split ring 82. The two trunnions so formed are received in bearings 47 made by the universal-joint ring 26, Figs. 10 and 11, and partly by bearing-blocks 45, Fig. 14, which are secured in place by screws s'. The three axes formed by the trunnions 27, 36, 28 and those of the plate 20 bearing in the casing intersect at the same point. The inclination of the plate 20 is varied by means of a scroll disk 43, Fig. 15<a>, engaging teeth on the plate. The plate 20 may be cushioned by connecting it to a piston 18 working in a dash-pot 17. The cylinder barrel 29 is driven by the end of the shaft 3 by means of a key 91 of the shape shown in Fig. 17, which allows of slight rocking motion of the barrel. Relief tubes 16, Fig. 16, are provided to equalize slight pulsations arising in the two ports 14. These tubes are made of elastic metal and are connected with the ports by passages 77. Fig. 4 shows the cylinders r, t, u, w, x, y, z, s, a' evenly spaced, and the ports i ... q unevenly spaced. The number of cylinders is odd, in order to secure smooth working. Cylinders which are at the same distance from the cylinder a<1> have their ports similarly located. Another method of correcting the volumetric irregularities of the apparatus is by making the connecting - rods of different lengths. The circle of cylinders may be of a different diameter from the circle of sockets in the socket ring. Figs. 21, 22, and 23 show a modification in which the balls between the socket ring and swash-plate may be dispensed with. The socket ring 23<a> is provided with channels 23<b> which allow the liquid to enter the recesses 20<a> to form a liquid bearing. In place of the \/-shaped extensions to the ports 14, an extension may be cut into the metal of the mid-plate, openings 14<b> being made as shown in Fig. 23. This Figure also shows the shifting of the mid-plate ports relatively to the median plane.