Pumps, compressors, and expanders with a teardrop-shaped rotor
AssigneeRotoliptic Technologies Incorporated
InventorsGreg John Montie, Peter Thomas Christopher Suke, Rogan David Milatz, Robert John Charles Pearson, Braden Adam Murphy
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Abstract
Rotary positive displacement machines can include a rotor having a teardrop-shaped profile that undergoes planetary motion relative to a stator having an elliptical or near-elliptical profile. In some embodiments, these rotary positive displacement machines can be used for a variety of applications including as positive displacement pumps. In some embodiments the rotor and stator are helical. In some embodiments the rotor comprises a dynamic seal. Aspects of the machine geometry can be selected to provide operational and/or durability benefits.
Claims20
A rotary machine comprising a stator having a stator cavity and a rotor disposed within said stator cavity,
- said rotor having a rotor helical profile, and a rotor axis, and having a rotor shape in cross-section transverse to said rotor axis along at least a portion of a length of said rotor that is a teardrop shape,
- said stator cavity having a stator helical profile, a stator axis, and having a stator shape at any cross-section transverse to said stator axis along at least a portion of a length of said stator cavity that is an outer envelope formed when said teardrop shape undergoes planetary motion,
- wherein said rotary machine is configured so that, in operation of said rotary machine, said rotor undergoes planetary motion relative to said stator, and
- wherein said stator shape is an outwardly-offset ellipse, and said rotary machine has a geometry characterized by a radius R, an offset O and an eccentricity E, wherein E is the distance between said rotor axis and said stator axis, O is greater than zero, R is greater than E, and R+O≥3E.
A rotary machine comprising a stator having a stator cavity and a rotor disposed within said stator cavity,
- said rotor having a rotor helical profile, and a rotor axis, and having a rotor shape in cross-section transverse to said rotor axis along at least a portion of a length of said rotor that is a teardrop shape,
- said stator cavity having a stator helical profile, a stator axis, and having a stator shape at any cross-section transverse to said stator axis along at least a portion of a length of said stator cavity that is an outer envelope formed when said teardrop shape undergoes planetary motion,
- wherein said rotary machine is configured so that, in operation of said rotary machine, said rotor undergoes planetary motion relative to said stator, and
- wherein said stator shape is an outwardly-offset ellipse, and said rotary machine has a geometry characterized by a radius R, an offset O and an eccentricity E, wherein E is the distance between said rotor axis and said stator axis, O is greater than zero, R is greater than E, and R+O=3E.
A rotary machine comprising a stator having a stator cavity and a rotor disposed within said stator cavity,
- said rotor having a rotor helical profile, and a rotor axis, and having a rotor shape in cross-section transverse to said rotor axis along at least a portion of a length of said rotor that is a teardrop shape,
- said stator cavity having a stator helical profile, a stator axis, and having a stator shape at any cross-section transverse to said stator axis along at least a portion of a length of said stator cavity that is an outer envelope formed when said teardrop shape undergoes planetary motion,
- wherein said rotary machine is configured so that, in operation of said rotary machine, said rotor undergoes planetary motion relative to said stator, and
- wherein said stator shape is an outwardly-offset ellipse, and said rotary machine has a geometry characterized by a radius R, an offset O and an eccentricity E, wherein E is the distance between said rotor axis and said stator axis, O is greater than zero, R is greater than E, and R+O>3E.
Dependencies are inferred from the claim text.