Drive shaft connector with counterweight and blades for cooling pump motor
AssigneeAgilent Technologies, Inc.
InventorsVannie Lu, George Galica, Aileen Cheang
Life of this patent
Estimating the term…
Abstract
A fluid pump includes a pump head and a motor coupled by a drive shaft. The pump head includes a pump inlet, a pump outlet, and a pumping stage in which a movable pump element is driven by the drive shaft. The motor includes a motor rotor and a motor stator. A connector couples the motor rotor and the drive shaft. The connector includes a plate rotatable with the drive shaft, fan blades attached to the plate for establishing a flow of air for cooling the motor, and one or more counterweights attached to the plate for reducing or eliminating imbalance created by certain forces generated by the pump during operation.
Claims20
A fluid pump, comprising:
- a pump head comprising a pump inlet, a pump outlet, and a pumping stage comprising a movable pump element, wherein the pumping stage is configured to pump a fluid from the pump inlet to the pump outlet in response to movement of the movable pump element;
- a motor comprising a motor rotor a motor stator, and a motor housing enclosing the motor rotor and the motor stator;
- a drive shaft comprising a front shaft end and a rear shaft end, wherein the front shaft end is coupled to the movable pump element, the rear shaft end is coupled to the motor rotor, the motor rotor is configured to drive rotation of the drive shaft about a drive axis, and the drive shaft is configured to drive movement of the movable pump element;
- and
- a connector coupling the motor rotor and the rear shaft end, wherein the connector comprises a plate rotatable about the drive axis, a plurality of fan blades attached to the plate and configured to establish a flow of ambient air through the motor housing, and a counterweight attached to the plate.
A fluid pump, comprising:
- a pump head comprising a pump inlet, a pump outlet, and a pumping stage comprising a movable pump element, wherein the pumping stage is configured to pump a fluid from the pump inlet to the pump outlet in response to movement of the movable pump element;
- a motor comprising a motor rotor and a motor stator, wherein the motor rotor has a front side facing toward the pump head and a rear side facing away from the pump head;
- a drive shaft comprising a front shaft end and a rear shaft end, wherein the front shaft end is coupled to the movable pump element, the rear shaft end is coupled to the motor rotor, the motor rotor is configured to drive rotation of the drive shaft about a drive axis, and the drive shaft is configured to drive movement of the movable pump element;
- and
- a connector coupling the motor rotor and the rear shaft end, wherein the connector is positioned at the rear side of the motor rotor and comprises a plate rotatable about the drive axis, a plurality of fan blades attached to the plate, and a counterweight attached to the plate.
Dependencies are inferred from the claim text.