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Application US20180258829
Published 2018-09-13
Pneumatic Motor Assembly, Flow Induction System Using Same And Method Of Operating A Pneumatic Motor Assembly
A pneumatic motor assembly that includes a pneumatic motor, which is driven by a compressed gas. The pneumatic motor assembly has a magnet assembly that magnetically couples the pneumatic motor assembly to an implement. After having being used to drive a pneumatic motor, the gas, which has expanded and become colder, cools the magnet assembly The pneumatic motor assembly can thus enable the use to the implement at temperatures at which the magnet assembly would otherwise reach or exceed the maximum operating temperature of the magnet assembly. A flow induction system that includes the pneumatic motor assembly. A method of operating a pneumatic motor assembly that also cools a magnet assembly that is part of the pneumatic motor assembly.
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- 1. A pneumatic motor assembly comprising:
a pneumatic motor configured to receive gas, the gas received at the pneumatic motor being compressed gas, the gas to circulate through the pneumatic motor to drive the pneumatic motor into rotation, the pneumatic motor further configured to output the gas subsequent the gas having driven the pneumatic motor; a magnet assembly connected to the pneumatic motor, the pneumatic motor configured to rotate the magnet assembly; and a cooling structure thermally connected to the magnet assembly, the cooling structure configured to receive the gas output from the pneumatic motor, the gas received at the cooling structure to circulate through the cooling structure, the gas to expand when circulating through at least one of the pneumatic motor and the cooling structure, an expansion of the gas causing a reduction in temperature of the gas to obtain a cooled gas, the cooling structure to transfer heat from the magnet assembly to the cooled gas circulating in the cooling structure.
- 7. A flow induction system to induce flow in a liquid, the flow induction system comprising:
a pneumatic motor configured to receive gas, the gas received at the pneumatic motor being compressed gas, the gas to circulate through the pneumatic motor to drive the pneumatic motor into rotation, the pneumatic motor further configured to output the gas subsequent the gas having driven the pneumatic motor; a magnet assembly connected to the pneumatic motor, the pneumatic motor configured to rotate the magnet assembly; a shaft assembly magnetically coupled to the magnet assembly, the shaft assembly having a flow inducer assembly configured for immersion in a liquid, the magnet assembly configured to rotate the shaft assembly and the flow inducer assembly to induce flow in the liquid; and a cooling structure thermally connected to the magnet assembly, the cooling structure configured to receive the gas output from the pneumatic motor, the gas received at the cooling structure to circulate through the cooling structure, the gas to expand when circulating through at least one of the pneumatic motor and the cooling structure, an expansion of the gas causing a reduction in temperature of the gas to obtain a cooled, the cooling structure to transfer heat from the magnet assembly to the cooled gas circulating in the cooling structure.
- 17. A method of operating a pneumatic motor assembly, the method comprising:
circulating a gas through a pneumatic motor to drive the pneumatic motor into rotation, the pneumatic motor being configured to transfer torque to an implement connected to the pneumatic motor; directing the gas having driven the pneumatic motor to a cooling structure, the cooling structure being thermally connected to the implement; circulating the gas through the cooling structure, the gas to expand when circulating through at least one of the pneumatic motor and the cooling structure, an expansion of the gas causing a reduction in temperature of the gas to obtain a cooled gas; and transferring heat from the implement to the cooled gas circulating in the cooling structure.
