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US 12,486,844 B2Granted
Rotor stator pump
AssigneeGraco Minnesota Inc.
InventorsMark D. Shultz, Joshua D. Roden
Life of this patent
Estimating the term…
Abstract
A rotor stator pump includes a rotating helical component and a static helical component. An electric motor is connected to the rotating helical component to drive rotation of the rotating helical component. The rotating helical component and the static helical component are disposed radially inward of the motor rotor of the electric motor.
Claims20
A pump comprising:
- an electric motor including a motor rotor configured to rotate on an axis and a motor stator disposed to electromagnetically drive rotation of the motor rotor;
- a pump stator disposed radially inward of the electric motor;
- and
- a helical rotor rod disposed at least partially within the pump stator, the helical rotor rod configured to rotate relative to the pump stator to form a series of progressing cavities to drive material along a cavity channel of the pump stator, the helical rotor rod connected to the electric motor to be rotated by the electric motor;
- an outer drive that extends axially outward from the electric motor in a first axial direction along a pump axis, the outer drive configured to rotate on the pump axis;
- and
- an inner drive connected to the outer drive to be rotated by the outer drive, wherein the inner drive extends in a second axial direction opposite to the first axial direction from the outer drive to the helical rotor rod to connect between the outer drive and the helical rotor rod, the inner drive configured to transmit rotational motion from the outer drive to the helical rotor rod such that the helical rotor rod rotates 1:1 with the motor rotor.
4 more elements
A pump comprising:
- an electric motor including a motor rotor configured to rotate on an axis and a motor stator disposed to electromagnetically drive rotation of the motor rotor;
- a pump stator disposed radially inward of the electric motor;
- and
- a helical rotor rod disposed at least partially within the pump stator, the helical rotor rod configured to rotate relative to the pump stator to form a series of progressing cavities to drive material along a cavity channel of the pump stator, the helical rotor rod connected to the electric motor to be rotated by the electric motor;
- an outer drive that extends axially outward from the electric motor in a first axial direction along a pump axis, the outer drive configured to rotate on the pump axis;
- an inner drive connected to the outer drive to be rotated by the outer drive, the inner drive extending in a second axial direction opposite the first axial direction, the inner drive including an inwardly projecting support connected to the outer drive and the inner drive including a drive link extending between the inwardly projecting support and the helical rotor rod;
- wherein the drive link is connected to the inwardly projecting support to rotate with the inwardly projecting support, and wherein the drive link interfaces with one of the inwardly projecting support and the helical rotor rod at a first slotted interface to allow the drive link to rock relative to the at least one of the helical rotor rod and the inwardly projecting support;
- wherein the inner drive is connected to the helical rotor rod to drive rotation of the helical rotor rod.
5 more elements
A pump comprising:
- a pump body;
- an electric motor disposed within the pump body, the electric motor including a motor rotor configured to rotate on an axis and a motor stator disposed around the motor rotor to electromagnetically drive rotation of the motor rotor;
- a pump stator disposed radially inward of the electric motor;
- a helical rotor rod disposed at least partially within the pump stator, the helical rotor rod configured to rotate relative to the pump stator to form a series of progressing cavities to pump material;
- an outer drive extending axially outward from the electric motor in a first axial direction along the axis, the outer drive configured to rotate on the pump axis;
- and
- an inner drive connected to the outer drive at a first interface to be rotated by the outer drive, the inner drive extending in a second axial direction opposite the first axial direction;
- wherein the inner drive is connected to the helical rotor rod at a second interface to drive rotation of the helical rotor rod;
- and
- wherein the second interface is spaced from the first interface in the second axial direction.
7 more elements
A pump comprising:
- a pump body;
- an electric motor disposed within the pump body, the electric motor including a motor rotor configured to rotate on an axis and a motor stator disposed around the motor rotor to electromagnetically drive rotation of the motor rotor;
- a pump channel extending through the pump body to define a flowpath for material to flow between the electric motor and between a pump inlet and a pump outlet;
- a pump stator disposed radially inward of the electric motor;
- a helical rotor rod disposed at least partially within the pump stator, the helical rotor rod configured to rotate relative to the pump stator to form a series of progressing cavities to pump the material;
- an outer drive configured to be rotated on the axis by the electric motor;
- and
- an inner drive connected to the outer drive to be rotated by the outer drive, the inner drive connected to the helical rotor rod to drive rotation of the helical rotor rod;
- wherein the pump channel extends through the outer drive such that the material flows within the outer drive;
- wherein the outer drive includes a drive opening through which the material can enter into the outer drive;
- and
- wherein the outer drive includes a funnel that directs the material inward towards the pump axis, the funnel disposed axially between the drive opening and a pump interface between the helical rotor rod and the pump stator.
9 more elements
Dependencies are inferred from the claim text.