| 摘要 |
1,048,430. Dynamo-electric machine cooling. WORTHINGTON CORPORATION. Dec. 9, 1963 [March 8, 1963], No. 48431/63. Heading H2A. In a liquid-cooled dynamo-electric machine, e.g. electric motor driving a pump or gear reducer, comprising a rotor 30 rotatable within a stator 23 enclosed in a hermetically sealed casing 12... 14 having a fluid evacuating outlet 49 and a conduit 41 connected to a pressurized cooling liquid source and constructed to inject a high-velocity stream of liquid toward machineheated surfaces, a rotatable diffuser 53 is positioned within the casing to receive a portion of the cooling liquid and redirect it toward the rotor 30 to impinge against heated surfaces thereof as a swirling stream of liquid droplets stated to have initially a rotational velocity substantially coincidental with that of the rotor. The liquid may be vaporizable such as that of a refrigeration system. The diffuser may have impelling vanes and alternatively be formed integrally with rotor cooling vanes 62. In another embodiment, Fig. 3, not shown, the liquid stream is stated to be injected through openings in the diffuser whilst the droplet steam is redirected by vanes or baffles thereon. There may be a diffuser at each end of the machine. The liquid stream from nozzle 44 passes through axial and radial rotor passages 32, 36, radial stator passages 27, and axial passages 38 between the stator and casing, whilst the droplet stream also impinges on the stator ends and into the air gap 34. The casing parts may be welded together.
|
