Air blower for a motor-driven compressor

摘要

A fluid compression system includes a compressor, an electric motor including a stator and a rotor positioned adjacent to the stator, and a shaft coupled to the rotor to support the rotor for rotation and having a drive end and a non-drive end. A plurality of flow-inducing elements are integrally-formed as part of the shaft and is adapted to induce a flow of fluid from the non-drive end toward the drive end in response to rotation of the shaft.

主权项

1. A fluid compression system comprising:
a compressor operable to produce a flow of compressed gas, a portion of the flow of compressed gas leaking toward an electric motor as a leakage flow;
the motor including a stator and a rotor positioned adjacent to the stator within a housing,a shaft coupled to the rotor to support the rotor for rotation and having a drive end connected to the compressor, and a non-drive end opposite the drive end and spaced further from the compressor than the drive end;a plurality of flow-inducing elements formed as a single piece with the shaft, spaced apart from the drive end and the non-drive end, the flow-inducing elements including an air inlet at a non-drive end of the flow-inducing elements and an air outlet at a drive end of the flow-inducing elements, the flow-inducing elements adapted to induce a flow of cooling air completely outside the shaft from the non-drive end toward the drive end in response to rotation of the shaft, wherein the shaft has a substantially uniform shaft diameter between the drive end and the flow-inducing elements, and wherein, the portion of the shaft including the flow-inducing elements defines an outside diameter that is less than or equal to the outside diameter of other portions of the shaft; anda cooling air flow path defined by the air inlet configured to ingress cooling air into the housing, a pathway formed between the rotor and stator in fluid communication with the inlet and a vent downstream of the pathway formed between the rotor and stator, the vent configured to egress the flow of cooling air and the leakage flow from the system.