Patent GB-831008-A (GB)
Title: Improvements in rotary fluid pumps and motors
IPC: F04C14/22
Filed: 1957-04-04
Abstract: 831,008. Rotary pump or vector. WEBSTER, B. July 4, 1958 [April 4, 1957], No. 11009/57. Class 110 (2). [Also in Groups II and XXIX] In a variable capacity fluid pump or vector of the sliding- rocking vane-type the rotor 5 rotates about a fixed centre A concentric in the housing 1, driving vanes 6A-6G which rotate about the centre B of a pin 15 adjustably eccentric in the housing. The vane-tips cooperate with an abutment formed by the arc X, Y (of length at least equal to the greatest distance between the tips of adjacent vanes, and of radius equal to the length of the vanes from centre B) of a segment 22 slidable in an arc about the centre C of the boss 18 of a disc 19, in which is fixed pin 15. Segment 22 is coupled by pin carrier 28 and pins 23A, 23B, 23C to the flange 20 if disc 19 and to a guide ring 30 coaxial with disc 19. Thus, if the eccentricity of pin 15 is altered by rotating disc 19, the arc X, Y of segment 22 continues to co-operate with the tips of the vanes. Fig. 1 shows the machine in the position of maximum capacity. In the other limiting position (Fig. 3, not shown), the centres of B and A coincide, the vanes are withdrawn completely within the periphery of the rotor, the segment 22 and the rotor 5 have only working clearance and new fluid passes through the mechanism. Segment 22 is attached by link 32 to piston 34 fitted in cylinder 36 and having an extension 39 to which may be attached levers, servo-devices, &c. for varying the capacity of the mechanism. Fluid pressure on segment 22 may be balanced by admitting fluid through duct 25 to chamber 29 and via duct 37 to cylinder 36. A block 43 (Fig. 4, not shown) may replace piston 34 and carry a threaded extension engaging with a threaded adjusting coupling. Seals 24, 27 limit leakage past segment 22 and an adjustable seal 48 past rotor 5. A further seal 55 (Fig. 4, not shown), may replace blanking plug 58. Leakage fluid drains to a sump 61 to which may be attached an external container 62 (Fig. 5, not shown). The mechanism may be used as a mixer by supplying a second fluid through duct 60 and a hollow adapter 59 (Fig. 3, not shown), which may replace blanking plug 58. By varying the displacement of the mechanism at constant speed the proportions of the two fluids may be varied. Provision is made for coupling two mechanisms together so that their shafts lie on the same centre line (Fig. 5, not shown), and their parts connected by short lengths of external piping 68, 69. Alternatively the second mechanism may be circulated and the inlet and outlet parts of the two mechanisms directly coupled (Fig. 4, not shown). Fluid then passes between the two mechanisms in a continuous closed cycle and they function as an hydraulic coupling or torque converter. In these configurations leakage fluid may be returned to circulation via a ball valve 71 (Fig. 4, not shown). In a modification the mechanism may be provided with a second segment on the opposite side of rotor 5 to segment 22 and operate as a pump or vector in which the fluid flow is reversible for a given direction of rotation, or as a fluid brake.