| 摘要 |
<p>A hydraulic fluid-driven, multicylinder, modular, reciprocating piston pumping machine of non pulsating flow and independently variable forward and return stroke speeds comprises several pumping modules (A, B...E) each having one primary cylinder (A1, B1...E1) and one secondary cylinder (A2, B2...E2) coaxially joined by an angularly and radially oscillating bushing (100) through which slides a piston rod (A3, B3...E3) with an angularly oscillating piston (A4, B4...E4; A5, B5...E5) at each of its ends. Each primary cylinder (A1, B1...E1) has the end opposed to the bushing closed by valve monifolds (A11, B11...E11) interconnected through a pressurized hydraulic fluid distritubor conduit (5) through which pressurized hydraulic fluid is supplied to the primary cylinder of each module by at least one hydraulic pump (1, 2). A hydraulic fluid chamber (A18, B18...E18) formed in each primary cylinder by the piston back, said bushing (100), the rod's surface and the cylinder's interior wall, communicates with all such chambers (A18, B18...E18) of the rest of the modules by a distributor-collector conduit (11) provided with at least one hydro-pneumatic accumulator (12) connected to a relatively large, second supplementary gas reservoir (23) constituting a volumetric compensator for all the hydraulic fluid contained in all said chambers (A18, B18...E18), and at the same time providing pressure for the pistons back stroke. One or more further hydro-pneumatic accumulators (8) are provided in a return fluid collector connected (7) to the valve manifolds (A11, B11...E11), and further individual hydro-pneumatic accumulators (A14, B14...E14) are provided for the valve manifolds (A11, B11...E11).</p> |
