Cooling for an electrically operated displacement pump
AssigneeGraco Minnesota Inc.
InventorsBradley H. Hines, Paul W. Scheierl, Brian W. Koehn, Jacob D. Higgins, Benjamin J. Paar, David L. Fehr
Life of this patent
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Abstract
An electrically operated displacement pump includes an electric motor having a stator and a rotor. The rotor is connected to the fluid displacer to power pumping by the fluid displacer. A cooling circuit extends at least partially about an exterior of a motor housing that houses the electric motor. A fan assembly blows cooling air through the cooling circuit.
Claims18
A displacement pump for pumping a fluid, the displacement pump comprising:
- an electric motor disposed in a motor housing, the electric motor including a stator and a rotor;
- a first fluid displacer configured to pump the fluid and connected to the rotor to be driven by the rotor;
- a second fluid displacer configured to pump the fluid and connected to the rotor to be driven by the rotor, wherein the rotor is disposed directly between the first fluid displacer and the second fluid displacer;
- a cooling circuit including a flowpath about an exterior of the motor housing that houses the electric motor, wherein a first portion of the flowpath wraps at least partially around the motor housing and is disposed between the first fluid displacer and the second fluid displacer;
- and
- a fan assembly configured to blow air through the cooling circuit.
A displacement pump for pumping a fluid, the displacement pump comprising:
- an electric motor including a stator and a rotor;
- a fluid displacer configured to pump the fluid and connected to the rotor to be driven by the rotor;
- a cooling circuit including a flowpath about an exterior of a motor housing that houses the electric motor;
- and
- a fan assembly configured to blow air through the cooling circuit;
- wherein at least one first heat sink of a plurality of heat sinks extends between and connects the motor housing and a control housing within which electrical control components of the displacement pump are disposed, such that a portion of the flowpath is at least partially defined by the motor housing, the control housing, and the at least one first heat sink of the plurality of heat sinks.
A displacement pump for pumping a fluid, the displacement pump comprising:
- an electric motor including a stator and a rotor;
- a fluid displacer configured to pump the fluid and connected to the rotor to be driven by the rotor;
- a cooling circuit including a flowpath about an exterior of a motor housing that houses the electric motor;
- and
- a fan assembly configured to blow air through the cooling circuit, wherein the fan assembly comprises:
- an impeller disposed within the flowpath and configured to rotate on a fan axis;
- a fan motor disposed within a control housing that is connected to the motor housing;
- and
- a fan shaft extending through a wall of the control housing between the fan motor and the impeller, wherein the wall of the control housing isolates an interior of the control housing from the flowpath and is exposed to the flowpath.
Dependencies are inferred from the claim text.