Integrated lubricating fluid filtering and metering device

A method of manufacturing an attritable engine lubrication system, the method comprising:

• manufacturing a bearing chamber, a fluid filtering inlet configured to receive a fluid, and a fluid filtering outlet located downstream of the fluid filtering inlet and configured to deliver the fluid to the bearing chamber;
• manufacturing a lattice, integral and conformal with the attritable engine, configured to filter the fluid, and located between the fluid filtering inlet and the fluid filtering outlet, wherein the lattice is formed of a repeated pattern of multiple spar assemblies formed adjacent one another, wherein each of the multiple spar assemblies comprises a plurality of spars that are sized and oriented to filter particulates in the fluid, and wherein a first of the multiple spar assemblies comprises six of the plurality of spars extending radially out from a center point;
• and
• manufacturing a metering port configured to meter the fluid, the metering port located adjacent and downstream of the lattice and located upstream of and spaced from the fluid filtering outlet.

A lubrication system for an attritable engine, the lubrication system comprising:

• a bearing chamber;
• a passage extending from a fluid filtering inlet to a fluid filtering outlet, the fluid filtering inlet configured to receive a fluid, and the fluid filtering outlet located downstream of the fluid filtering inlet and configured to deliver the fluid to the bearing chamber;
• a three dimensional lattice configured to filter the fluid, the three dimensional lattice arranged fluidly in line between the fluid filtering inlet and the fluid filtering outlet, the three dimensional lattice comprising a repeating pattern of a plurality of spar assemblies, each of the plurality of spar assemblies comprising a plurality of spars sized and oriented to filter particulates in the fluid passing through the lattice from the fluid filtering inlet to the fluid filtering outlet, the plurality of spars in a first of the plurality of spar assemblies radiating out from a common point and comprising a first spar, a second spar and a third spar, the first spar and the second spar lying along a reference plane, and the third spar angularly offset from the reference plane;
• and
• a wall extending across the passage between an upstream portion of the passage and a downstream portion of the passage, a metering port extending through the wall and fluidly coupling the upstream portion of the passage and the downstream portion of the passage, the metering port configured to meter the fluid, and the metering port disposed downstream of the three dimensional lattice and upstream of the fluid filtering outlet;
• the three dimensional lattice disposed within the upstream portion of the passage, and the downstream portion of the passage extending from the wall to the fluid filtering outlet.