High pressure magnetic coupling shrouds and methods of producing the same
High pressure magnetic coupling shrouds and methods of producing the same are disclosed herein. An example shroud disclosed herein includes an inner shell including a thermoplastic composite or a metal, and an outer shell including a composite material.
1 . A shroud for a fluid pump comprising:
an inner shell including a thermoplastic composite; and
an outer shell including an inner radial surface directly coupled to an outer radial surface of the thermoplastic composite, the outer shell including a composite material, wherein the outer shell includes a thickness between 25 mils and 125 mils.
2 . The shroud of claim 1 , wherein the inner shell includes a nickel-based alloy.
3 . The shroud of claim 1 , wherein the thermoplastic composite is a polyetheretherketone.
4 . The shroud of claim 1 , wherein the composite material includes an epoxy resin.
5 . The shroud of claim 1 , wherein the composite material includes at least one of carbon fibers or graphite fibers.
6 . The shroud of claim 5 , wherein at least one of the carbon fibers or the graphite fibers are positioned in more than one orientation.
7 . The shroud of claim 1 , wherein the composite material includes fibers positioned in a first orientation, a second orientation different from the first orientation, a third orientation different from the first orientation and the second orientation, and a fourth orientation different from the first orientation, the second orientation, and the third orientation.
8 . The shroud of claim 7 , wherein the first orientation is substantially orthogonal to the second orientation.
9 . The shroud of claim 8 , wherein the third orientation is substantially orthogonal to the fourth orientation.
10 . The shroud of claim 1 , wherein the thermoplastic composite is a polyamide-imide.
11 . A magnetically driven pump comprising:
a first shaft;
a second shaft at least partially positioned around the first shaft, the second shaft magnetically engaged with the first shaft; and
a shroud positioned between the first shaft and the second shaft, the shroud including:
a composite shell, wherein the composite shell includes fibers positioned in a first orientation, a second orientation different from the first orientation, a third orientation different from the first orientation and the second orientation, and a fourth orientation different from the first orientation, the second orientation, and the third orientation, wherein the composite shell includes a thickness between 25 mils and 125 mils; and
a liner including an outer radial surface in contact with an inner radial surface of the composite shell, the liner including a thermoplastic.
12 . The magnetically driven pump of claim 11 , wherein the composite shell includes pores.
13 . The magnetically driven pump of claim 11 , wherein the composite shell includes fibers and an epoxy resin.
14 . The magnetically driven pump of claim 13 , wherein a ratio of eddy current loss caused by the shroud to a thickness of the liner is less than 0.06.
15 . The magnetically driven pump of claim 11 , wherein the fibers include at least one of carbon or graphite.
16 . The magnetically driven pump of claim 11 , wherein the liner includes a nickel-chromium based alloy.
17 . A shroud for a canned motor pump, the shroud comprising:
a composite shell including first fibers in a first orientation and second fibers in a second orientation, wherein the composite shell includes a thickness between 25 mils and 125 mils; and
an inner shell including an outer radial surface in contact with an inner radial surface of the composite shell, the inner shell including a thermoplastic.
18 . The shroud of claim 17 , wherein the composite shell includes third fibers in a third orientation and fourth fibers in a fourth orientation, the third orientation substantially orthogonal to the fourth orientation.
19 . The shroud of claim 17 , wherein the first orientation is approximately 45 degrees from the second orientation.