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US 11,454,226 B2Granted
Electric off-axis opposing piston linear actuator pumping system
AssigneeSchaeffler Technologies AG & Co. KG
InventorsAndre Vazquez, Craig Hooker, Michael Conlin
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Abstract
A pumping system for fracking fluid is designed to provide nearly constant flow rate. The pumping system includes a set of linear actuator pumping units, each driven by an electric motor. Each pumping unit includes a first set of pumping chambers that expel fluid when the linear actuator is moving in a first direction and a second set of pumping chambers that expel fluid when the linear actuator is moving in an opposite direction. The speeds of the actuators are coordinated such that a total flow rate of the pumping system is substantially constant.
Claims8
A pumping unit comprising:
- a housing defining a central cavity and a plurality of bores radially around the central cavity;
- a shaft extending through the central cavity;
- a linear actuator within the central cavity configured to translate the shaft;
- a first set of pistons extending from a first subset of the bores and linked to a first end of the shaft;
- and
- a second set of pistons extending from a second subset of the bores and linked to a second end of the shaft, the second end of the shaft on an opposite side of the housing from the first end of the shaft.
3 more elements
Dependencies are inferred from the claim text.