Composite motor stator
AssigneeHalliburton Energy Services, Inc.
InventorRichard Bottos
Life of this patent
Estimating the term…
Abstract
A hollow stator for a Moineau-style motor is constructed from a composite material such as fiberglass or graphite. A series of lobes arranged along its inner surface corresponds to the external lobes of a rotor inserted in the stator, and enables use of a constant width elastomer layer between the stator and the rotor. The composite stator includes a pair of box socket interface members at its ends to enable the stator to be attached to other components such as pipeline sections.
Claims23
A stator configured for use in a motor comprising:
- a hollow pipe, said pipe having a length, an inner profile and an outer profile, said pipe being made from a plurality of fibers adhered together by resin;
- wherein said inner profile of said pipe has a plurality of lobes, said lobes of inner profile being disposed in a helical arrangement along said length of said pipe.
A motor, comprising:
- A stator having a length, an inner profile and an outer profile, said stator being made from a plurality of fibers adhered together by resin, said inner profile of said stator has a plurality of lobes, said lobes of inner profile being disposed in a helical arrangement along said length of said stator;
- A rotor residing inside said stator, said rotor having an outer surface defining a plurality of lobes but one fewer than defined by said stator, said lobes of said rotor being disposed in a helical arrangement along said length of said rotor.
A method for joining a hollow, metal box housing to a composite stator tube, comprising:
- filling a relieved area on an interior surface of said metal box housing with epoxy;
- inserting an end of said composite stator tube into said metal box housing until said end of said stator tube is adjacent said relieved area;
- inserting a wedge ring into said metal box housing, said wedge ring abutting said end of said stator tube upon the insertion of both the stator and the wedge ring into said metal box housing such that said end of said stator is forced toward said relieved area;
- and
- affixing said stator tube to said metal box housing by hardening of said epoxy.
Dependencies are inferred from the claim text.