GB861332A - Pulsation reducing wabble pump structure - Google Patents

Abstract

861,332. Rotary pumps. CORNELIUS, R. T. March 2, 1959, No. 7179/59. Class 110 (2). A rotary pump assembly of the nutating piston type, Fig. 2, comprises two units 12, 13 of equal capacity which are driven by a motor 11 of the squirrelcage type and are cooled by fans 29. Each pump comprises a wobble-plate 79 mounted on a shaft 63 disposed within a casing 35 having a partition 84, the plate 79 being notched to receive said partition. The two pumps are connected in series and phased to reduce pulsations. In a modification, Fig. 10, the two pump units 112, 113 are mounted in a common casing having a divider 137, 138 for the wobble-plates 163, 164 which are carried by a head 154. The member 154 is driven by two opposed driving-shafts such as 142 each of which is coupled to a shaft 156 journalled in bearings 157 as shown. The pump is also provided with counter-balances 196 and seals 173. In a second modification, Fig. 12, the pump units 212, 213 are mounted in a common casing 224 and have a common wobble-head 241, the plate 249 of which has attached to it spherical wings 251. The wings are received in grooves 229, 237 of casing inserts 225, 234, respectively, and separate the two concentrically-arranged pumping chambers 253, 254 from one another. In a modification of the pump described with reference to Fig. 12 the plate 249 extends radially from an annular rotor structure having opposed dish-shaped sides, see Figs. 16 and 17 (not shown).