PUMP AUTHORITY SWITCHING APPARATUS FOR A FLUID DISTRIBUTION SYSTEM

摘要

A fluid distribution system includes a boost supply providing a fluid flow, and a fluid metering system downstream of the boost supply. The fluid metering system supplies fluid to a downstream device. A main fluid pump supplies at least a portion of the fluid flow to the fluid metering system. A shut-off valve is positioned upstream of a main fluid pump inlet. An actuation system is positioned downstream of the boost supply. The actuation system supplies fluid to one or more hydraulically-operated devices. An actuation pump supplies at least a portion of the fluid flow to the fluid metering system and to the actuation system. A first valve is positioned between the actuation pump and the fluid metering system. The first valve and the shut-off valve are operable to switch between the main fluid pump and the actuation pump as a source of fluid supply to the fluid metering system.

主权项

1. A fluid distribution system comprising:
a boost supply which provides a fluid flow; a fluid metering system positioned downstream of the boost supply, the fluid metering system configured to supply fluid at a minimum pressure to a downstream device; a main fluid pump configured to supply at least a portion of the fluid flow to the fluid metering system, a shut-off valve positioned upstream of a main fluid pump inlet; an actuation system positioned downstream of the boost supply, the actuation system configured to supply fluid to one or more hydraulically-operated devices; an actuation pump configured to supply at least a portion of the fluid flow to the fluid metering system and to the actuation system; a first valve positioned between the actuation pump and the fluid metering system, wherein the first valve and the shut-off valve are operable to switch between the main fluid pump and the actuation pump as a source of fluid supply to the fluid metering system.