Regenerative pump with variable regenerative flow
AssigneeEaton Intelligent Power Limited
InventorsCody Mackey, Martin Augustine Clements, Matthew Reinhardt
Life of this patent
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Abstract
A regenerative pump includes a housing defining a cavity having a fluid inlet arrangement and fluid outlet arrangement, and a channel having an open volume extending between the fluid inlet arrangement and the fluid outlet arrangement. A rotatable shaft extends into the housing. An impeller is mounted to the shaft within the cavity and has a plurality of vanes spaced circumferentially around the axis and opening into the channel. An arm arrangement at least partially defines walls of the channel. The arm arrangement is radially movable to vary the volume of the channel. Enlarging the volume of the channel inhibits regenerative circulatory flow during pumping and limits the pressure generated.
Claims15
A regenerative pump comprising:
- a housing defining a cavity having a fluid inlet arrangement and fluid outlet arrangement, and a channel having an open volume extending between the fluid inlet arrangement and the fluid outlet arrangement;
- a rotatable shaft extending into the housing having a longitudinal axis;
- an impeller mounted to the shaft within the cavity;
- the impeller having a plurality of vanes spaced circumferentially around the axis and opening into the channel;
- and
- an arm arrangement including a wall that partially bounds the channel, the wall defining a groove that faces the impeller;
- the arm arrangement being radially movable with respect to the axis to vary the volume of the channel.
A regenerative pump comprising:
- an impeller rotatable about an impeller axis, the impeller including a first axial side and a second axial side, the impeller including a first plurality of regenerative pump vanes spaced about a circumference of the impeller at the first axial side of the impeller, the impeller also including a second plurality of regenerative pump vanes spaced about the circumference of the impeller at the second axial side of the impeller;
- and
- a pump housing in which the impeller is rotatably mounted, the pump housing defining an inlet and an outlet, the pump housing also defining a channel that extends circumferentially about the impeller between the inlet and the outlet, the channel including first and second regenerative flow sections respectively corresponding to the first and second pluralities of regenerative pump vanes, each of the first and second regenerative flow sections having a rounded cross-sectional profile, the pump housing including an arm that defines at least a portion of the channel, the arm opposing the circumference of the impeller, the arm being moveable away from the impeller axis to enlarge a volume of the channel and being moveable toward the impeller axis to reduce the volume of the channel.
A regenerative pump comprising:
- an impeller rotatable about an impeller axis, the impeller including a first plurality of regenerative pump vanes spaced about a circumference of the impeller at a first axial side of the impeller, the impeller also including a second plurality of regenerative pump vanes spaced about a circumference of the impeller at a second axial side of the impeller;
- a pump housing in which the impeller is rotatably mounted, the pump housing defining an inlet and an outlet, the pump housing also defining a channel that extends circumferentially about the impeller between the inlet and the outlet;
- and
- wherein the channel comprises a regenerative section and a pressure limiting section;
- each of the regenerative section and the pressure limiting section having a length that varies responsive to an amount of pressure in the channel;
- wherein the regenerative section of the channel deflects fluid towards the regenerative pump vanes and wherein the pressure limiting section of the channel has an expanded size compared to the regenerative section of the channel;
- wherein the regenerative pump includes an arm arrangement having a wall that partially bounds the channel, wherein the wall defines a groove that faces the impeller, and wherein the arm arrangement is radially movable with respect to the impeller axis to vary a volume of the channel.
Dependencies are inferred from the claim text.