| 摘要 |
989,588. Rotary pumps. R. LINDER. Aug. 7, 1963 [Aug. 30, 1962], No. 31235/63. Heading F1F. A rotary pump comprises a piston 1 having a uniform thickness and a central opening 20 having formed therein internal gear teeth; a chamber 4 bounding the piston and limited by transverse walls 6, 7 and peripheral wall 5, said peripheral wall having formed therein six cylindrical surfaces which form with the piston three separate elementary chambers 21, 22 and 23; and a driving shaft 3 extending through opening 20 and carrying eccentrically a pinion 2 meshing with the internal teeth in said opening 20 such that on rotation of the pinion the piston revolves and executes a translational movement in its plane of rotation, whereby the periphery of the piston permanently contacts the three convex surfaces of the peripheral wall. As shown, at the apex of each elementary chamber are positioned hollow cylindrical valves 13a, 13b and 13c which include two diametrically opposed ports 33 and 34. The valves are controlled by gearing 12 such that during rotation annular chamber 15 is connected through ports 33 and 34 with the interior of their respective elementary chambers and when the valve has rotated through 180 degrees, the elementary chambers are in communication with annular chamber 18 via ports 33 and 34. Fluid to be compressed enters chamber 15 via pipe 14 and at the appropriate position of the valves enters the respective elementary chamber where it is compressed and then expelled into chamber 18 and out of the pump via outlet 16. The three convex surfaces are formed of cylindrical rollers 24, 25 and 26 made, e.g. of metal or a selflubricating synthetic material, the rollers being sealed with reference to the corresponding surfaces of wall 5. Packing pieces 19 of self lubricating synthetic material or metal are employed in the transverse surfaces of piston 1. The eccentricity of the pinion 2 with respect to shaft 3 is given by e = P.C.D. of pinion/125 and the distance A separating the axis of shaft 3 from the axis of the rollers is given by A = 3�9722 x P.C.D. of pinion. The pump may be used as a vacuum pump, compressor or as a generator of compressed gas adapted to feed a compressed air engine. When the pump is modified to feed a gas engine or turbine, explosion chambers are incorporated. Channels may be included for the circulation of a coolant and auxilliary channels may be included for reversing the direction of flow of medium through the pump. |
