Difference between Dry motor and wet motor
Difference between Dry motor and wet motor
(OP)
Hi All,
I like to know the difference between Dry motor and wet motor can any 1 explain.
I like to know the difference between Dry motor and wet motor can any 1 explain.





RE: Difference between Dry motor and wet motor
The wet wound motors I'm familiar with are for boiler water circulating pumps and submersible water supply pumps. Wet wind motors have a fluid (the fluid the unit is pumping) in the gap between rotor and stator and surrounding the conductors in the stator slots. The magnetic gap tends to be a bit larger the conventional motors and they use hydrodynamic journal bearings which are also lubricated by the pumping fluid. The conductors are covered with a thicker insulation (Cross linked poly-ethylene) and use a random wind (conductors are pulled through the stator slots one at a time and the end turns and individually formed). A heat exchanger is used to supply cooling water to the wind and bearings as they are susceptible to heat damage. I hope this helps.
RE: Difference between Dry motor and wet motor
Keith Cress
Flamin Systems, Inc.- http://www.flaminsystems.com
RE: Difference between Dry motor and wet motor
JRaef.com
"Engineers like to solve problems. If there are no problems handily available, they will create their own problems." Scott Adams
For the best use of Eng-Tips, please click here -> FAQ731-376
RE: Difference between Dry motor and wet motor
The smaller canned rotor pumps on forced hlt water heating systems have a paramagnetic wall between the rotor and stator that allows the rotor to live in the circulating water and uses water cooled bearings. The stator winding operates dry. The water circulation between the pumping chamber and the rotor is restricted to just enough to lubricate the bearings so that passive air cooling is enough to keep the bearings and stator cool enough. The lamination varnish of the rotor needs to be rated for a highly elevated temperature which is just another materials science problem.
Mike Cole
RE: Difference between Dry motor and wet motor
http://www.sunstarusa.com/products/hitachi.html
JRaef.com
"Engineers like to solve problems. If there are no problems handily available, they will create their own problems." Scott Adams
For the best use of Eng-Tips, please click here -> FAQ731-376
RE: Difference between Dry motor and wet motor
RE: Difference between Dry motor and wet motor
An open drip proof motor could be considered dry and a weather-proof motor considered wet.
Are we talking about the whole motor being externally wet, or are we discussing the various types of motors with the rotors and/or windings wetted by the process fluid or some other fluid?
respectfully
RE: Difference between Dry motor and wet motor
http://www.flygt.co.uk/14174.asp
No-one has yet mentioned roller motors. These machines are oil filled with the oil being shared between the winding and gearbox providing both cooling and lubrication.
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RE: Difference between Dry motor and wet motor
It doesn't appear he is a student posting to get an answer on a homework problem, so hopefully he will grace us with more information so we can sleep at night.
JRaef.com
"Engineers like to solve problems. If there are no problems handily available, they will create their own problems." Scott Adams
For the best use of Eng-Tips, please click here -> FAQ731-376
RE: Difference between Dry motor and wet motor
In most of the cases we can see submersible pumps uses wet motors, but there are some companies manufacture both wet and dry motors submersible pump.wht is the merits and demerits between them.if 1 performs quite well than the other what is the necessity 2 manufacture the other 1.
pls advise.
RE: Difference between Dry motor and wet motor
JRaef.com
"Engineers like to solve problems. If there are no problems handily available, they will create their own problems." Scott Adams
For the best use of Eng-Tips, please click here -> FAQ731-376
RE: Difference between Dry motor and wet motor
RE: Difference between Dry motor and wet motor
With an oil filled well pump motor the winding wire is not insulted. The motor is filled with oil and The seal at the ouput shaft protects the winds. The seal can be mercy(Byron Jackson) or mechanical (Sun-star, Byron Jackson, Reda and others).
All the motors are "sealed" It more a matter of what will happen when the seal fails. Water filled motors can keep running and oil filled well ppump motors short out. However, both types of motor have there benifits.
RE: Difference between Dry motor and wet motor
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