On Thursday 28 March 2019 22:01:39 Jon Elson wrote: > On 03/28/2019 04:24 PM, Gene Heskett wrote: > > This one has a PM rotor, and it all runs in the bore of a potted > > stator, which I assume has a shaded pole lashup for starting. I not > > shaded pole, then it will run synchronously, either direction. If if > > runs at all. > > Yes, the pumps in our washing machine have a PM rotor, and > the stator looks a LOT like the old "phonograph" motors, but > without the shaded pole. When the AC is applied, the rotors > vibrate wildly until they manage to jump into synch with the > field, and so it starts in a random direction. > They have a 1/4 turn slip coupling between the rotor and the > pump that allows this vibration start to develop. Pretty > crazy scheme. > > Jon > There is no such slip coupling in this pump that I felt. The nylon paddles are firmly attached to the pm rotor. So I wonder if that has become frozen from sitting 3 days or so. I've not changed the distilled water for the rv antifreeze yet. So I'm mentally questioning if the antifreeze would have an lubricating effect that would restore this slip by lubricating it.
The water has slowly turned slightly yellow, so there is something reacting else it would remain clear. This is not purified by osmosis, but is steam distilled according to the label. When I am next near the tank, I'll check the waters resistance. I have a feeling it will be well below a megohm. If the antifreeze isn't a long term fix, I may resort to seeing if Culligan will sell me some of their deinizer resin, and bring my return line back to dump into about a 10" tall tube of 4" on top of the tank similar to your white swarf catcher/filter. Maybe even bury it in the tank with a milk or coffee filter to keep the resin in the tube. When cooling broadcast klystrons, we used up to 30% ethylene glycol in the cold months, any thicker a mix got so viscous the 15 hp pumps couldn't maintain the flow, about 70 GPM but that was technical grade pure stuff since the automotive additives to control corrosion also made if very low resistance, so there we bled about a gallon a minute off the high side of the pump and ran it thru a deionizer cartridge on its way back to the 500 gallon storage tank. When the mix could be read for any resistance below 10 megohms, it was time to replace the cartridge as that style was not rechargeable. Cartridges were about $200 ea then, but once the coolant was in good shape it only took 3 or 4 a year to keep it that way. With a decent lid on the tank, makeup water was only a couple gallons a month. That deionizer setup saved us the cost of replacing all the brass stuff in the water connections by stretching the replacement schedule from 6 months to 3 years or more. 2" quick disconnects were about $120/copy then & there were 4 of them, plus 4 more smaller ones for the body cooling circuit. Are any of you old enough to remember a capacitor shortage when OPEC raised the oil price in the 70's? I caused some of that, getting deep into October I couldn't find a barrel of tech grade stuff at any of the petroleum peddlers until I found a barrel about to be shipped to Sprague as thats the same stuff used in electrolytic capacitors. It was already sitting on the dock in Omaha at the Mobile wholesaler. The last one in the country, and I conned the Mobile folks into selling it to the state of Nebraska and shipping it to me at KXNE-tv. So I caused that nationwide cap shortage by buying that barrel of tech grade. Mobile, nor anyone else that winter had stock enough to even keep vehicle radiators at full 50/50 mix. The places that sold it were upping the price to around $12 a gallon. I got that last barrel for $8.50/gallon before it went clear out of sight. The year before it was about $2.35/gallon. Like Paul Harvey was fond of saying, now you have heard the "rest of the story". ;-) > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users Cheers, Gene Heskett -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) Genes Web page <http://geneslinuxbox.net:6309/gene> _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
