Apparatus And Method For Controlling Or Limiting Rotor Orbit In Moving Cavity Motors And Pumps

摘要

Techniques involve a motor assembly including a rotor and a stator. The stator includes a contact surface for contacting an outer surface of the rotor. The contact surface includes a rigid material. The motor assembly also includes at least one constraint disposed along a length of the motor assembly, where the constraint constrains a radial and/or tangential movement of the rotor relative to the stator. The at least one constraint may be disposed at one or more proximate ends of the motor assembly, and/or along the length of the motor assembly. The contact surface of the stator may have a profile including peaks and valleys, and in some embodiments, the contact surface may be treated to reduce friction and/or wear.

主权项

1. A motor assembly comprising:
a rotor comprising; a stator comprising contact surface configured to contact an outer surface of the rotor, wherein the contact surface comprises a rigid material; and at least one constraint disposed along a length of the motor assembly, wherein the constraint is configured to constrain a radial movement of the rotor relative to the stator.