Patent GB-801077-A (GB)
Title: Improvements in or relating to valve arrangements and to regenerative heat exchangers controlled thereby
Inventor: RITZ HUGO HEINRICH LUDOLF
IPC: F28D17/04
Filed: 1954-08-09
Abstract: 801,077. Thermal regenerators; reversing valves. PARSONS & CO., Ltd., C. A. June 24, 1955 [Aug. 9, 1954], No. 23113/54. Class 64(1) [Also in Group XXIX] A valve e.g. a reversing valve for regenerators, comprises 'a casing having two or more portions 2, 6, 8 of different crosssectional dimensions each portion having ports 20, 30, 17 for the flow of fluid, and a movable open-ended tubular valve element 10 positioned within the casing and having portions 10a, 10b, 10c also of different cross-sectional dimensions for sliding contact with the casing portions, to open and close the ports therein. In the apparatus shown in Fig. 1, two regenerator matrices 12, 13, of elongated annular shape are mounted in a similarly shaped outer casing 1 containing two such valves. The valve elements or sleeves 10, 11 are slidable longitudinally. With these elements in the position shown, compressed air to be heated enters at A, flows through the sleeve 10, the ports 17, the matrix 13, and the ports 20, to a space 23 which has a lateral outlet (not shown). Hot gases from a lateral inlet pass through the space 24, ports 25, matrix 12, and ports 29 to the outlet B. Reversal of the valves opens the ports 30, 31 and closes the ports 17, 29. Reversal is effected by interconnected pistons 43a, 44a slidable in cylinders 49, 51 under the action of oil supplied under pressure to the cylinders. The pistons are connected by tubes such as 43b, 43c to hubs 36 which are connected to the sleeves by spokes 35. The sealing rings 34 of the sleeves are lubricated by oil leaking from the cylinders through small holes into the tubes 43b. and distributed by a metering valve 54 to pipes leading to bosses 68 with passages to the rings 34. Radiation shields 14, 16 spaced from the outer casing 1 and similar shields spaced from the sleeves 10, 11, are provided, to protect the casing and sleeves from uncooled hot gases and heated air. In another form, Fig. 14, the compressed air valve sleeve 107 and its associated casing with ports has smaller diameters than the hot gas valve sleeve 113 and its associated casing. The hot gas valve and the two regenerator matrices are mounted in one outer casing, and the air valve in another outer casing. The two casings are interconnected by four conduits for the air and hot gases. (The outer casings, conduits and matrices are not shown). The two sleeves are linked together, either hydraulically as shown or by a pivoted rod, so as to move simultaneously in opposite directions. The compressed air acts on one side of the enlarged portion 107a, 113a of each sleeve, and exerts a greater force on the larger sleeve than on the smaller. When the sleeves reach the end of their stroke this excess of force tends to accelerate the sleeves to reverse their direction of movement. The movements are controlled by oil supplied by a pump 150 through a rotating valve 151 to cylinders 142, 145, containing pistons 143, 146 connected by rods 144, 147 to the sleeves. As the oil enters one cylinder from the valve 151. it leaves the other and passes through the valve 151 to an outlet 155. Oil on the other sides of the pistons passes from one cylinder to the other through a pipe 154. Thus when the valve 151 changes over the oil supply from one cylinder to the other, the sleeves are permitted to move under the action of the air pressure. In a modification the sleeves are linked mechanically by a pivoted rod. Specification 760,913 is referred to.