Remotely reconfigurable high pressure fluid passive control system for controlling bi-directional piston pumps as active sources of high pressure fluid, as inactive rigid structural members or as isolated free motion devices

摘要

A bi-directional pump system that can be configured for a plurality of operating modes. The bi-directional pump system includes a plurality of bi-directional pumps each having their own valving system that are connected to a common high pressure manifold, a low pressure manifold and a suction manifold. Via the respective valve systems, each pump can be configured into: (1) a single-acting pumping mode; (2) a double-acting pumping mode; (3) an inactive free motion mode; and (4) an inactive rigid mode. One exemplary application of the bi-directional pump system is on an articulated wave energy conversion system that consists of three floating barges: a front barge, a center barge and a rear barge where the front barge and center barge are hingedly connected as are the center barge and the rear barge. A first set of the bi-directional pumps span the first hinge connection and the second set of bi-directional pumps span the second hinge connection. The bi-directional pump system intakes sea water and, using wave energy, outputs a high pressure flow of sea water for water desalination and/or for driving electrical generators.

主权项

1. A bi-directional pump system for providing a high pressure liquid output, said pump system comprising:
a first bi-directional pump having a single piston and piston rod that can translate within a single cylinder in two opposite directions, said piston separating said cylinder into two chambers, said piston displacing liquid located in each chamber when said piston is in motion due to external forces acting through said piston rod and said cylinder; each chamber being in liquid communication through a valve network to a high pressure manifold, a low pressure manifold and a suction manifold, said high pressure manifold having an output for delivering the high pressure liquid to a target process and wherein said suction manifold provides a liquid input into said bi-directional pump system; and wherein said valve network can be configured to deliver high pressure liquid from one of a single-acting pumping mode and a double-acting pumping mode, said single-acting pumping mode delivering high pressure liquid to said target process during piston motion in one of said two opposite directions and wherein said double-acting pumping mode delivers high pressure liquid to said target process during piston motion in both of said two opposite directions.