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waterproof shaft seal?
"Paul" wrote in message news:PxVwb.309584$Fm2.326329@attbi_s04... http://www.pyiinc.com/?section=pss_shaft_seal&sn=4 "MBS" wrote in message m... I am trying to waterproof a small electric motor (submerged) so that shaft will be sticking out of waterproof enclosure. Can anyone point me to a source of water sealed bushings or bearings for this sort of application? I have been looking all over the net and can't seem to come up with ideas or supplies to do this. The shaft size will be = 1/4" Thanks! Bailey-- Just an idea... Would it not be possible to submerge the whole electric motor unit in a kind of container completely filled with a nonconductive (non toxic) oil. If e.g. the container is kept upright with the shaft protruding downwards and the oil being lighter than water, it seems to me that the motor could be safely operated without expensive water sealed bearings and/or bushings. As the container would remain opened to the surrounding water, the hydrostatic pressure inside and outside would be equal. Fluids can not easily be compressed so this unit could be used in any depth of water with only a lightweight protective container and a closely fitting shaft-tube leaving a small enough opening for pressure compensation but too small to allow the spilling of the oil when tilted. The only setback would be that the motor could only be tilted a little less than 90° from the upright position and that the internal turbulence caused by the rotor (at higher rpm) would certainly slow down the motor (depending on the construction of the motor). With this system one could easily insulate the motor completely from the container/vessel. (No maintenance, no galvanic effects) JP |
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