change the agitators motor 1

[lahcen]

we use an agitator to separate the natural gas from sealing oil of a compreseur, and we want to change the agitators motor (speed = 1000 r / m) with a motor that has the same features except for its speed (1500 r / m)? is that possible? and does it have an ifluence on the separation operation or not?

 

[ScottyUK]

You'll need a more powerful motor, likely around 2x - 2.5x the present rating although that depends on how the load from the agitator increases with speed. That probably means a larger frame size and heavier motor with a larger shaft, which in turns means a new or modified mounting arrangement and coupling. You'll need a larger motor starter, and maybe an uprated supply to the starter. Will the agitator itself withstand the increased mechanical forces?

A lot to consider.

 

[Artisi]

ScottyUK: not necessarily correct going from 6 pole to 4 pole might even reduce a frame size.

It is a capital mistake to theorise before one has data. Insensibly one begins to twist facts to suit theories, instead of theories to suit facts. (Sherlock Holmes - A Scandal in Bohemia.)

 

[ScottyUK]

Artisi - I agree that from 6 pole to 4 pole of equal power likely will drop a frame size, but doubling the power would probably more than counteract the effect. Maybe the OP will post a bit more detail and we can actually give some values.

 

[DubMac]

Agitators/mixers have fairly complicated required HP equations; especially due to viscosity. Why would anyone think rpm would NOT have an effect on separation? Simple test: See if 0 rpm has the same mixing/separation effects as 1000 rpm; if it does, then the blades have fallen off your agitator.

Call Lightnin or Chemineer mixers and ask them what they recommend.

 

[lahcen]

hi guys, sorry for the delay
just for clarification;
the characteristics of our asynchronous motor are:
power 0.75 KW
380 V
2.3 A
925 RPM
6 poles
but because of the failure of the engine, we want to change to one that has the same characteristics except for the speed which is equal to 1500 RPM
other information is: the oil viscosity 46 cSt at 40 ° C
is it possible to make the change? and what are the recommended calculations?
thank you