Gearbox Oil Foaming - How to Remove
Gearbox Oil Foaming - How to Remove
(OP)
I have an existing gearbox system being fed Dextron III oil. The system is 5.9:1, max speed of about 21000 RPM on the high side. It appears that my reservoir is not big enough to allow the oil to settle out all of the foam being generated at higher speeds. This problem is causing my gearbox to heat up quickly and my heat exchangers to lose their capability. Anyone have any ideas on how to speed up the de-foaming process. I am looking at ultrasonic cleaning devices as a possible solution. They help remove bubbles out of liquid. Any suggestions would be appreciated.





RE: Gearbox Oil Foaming - How to Remove
RE: Gearbox Oil Foaming - How to Remove
RE: Gearbox Oil Foaming - How to Remove
RE: Gearbox Oil Foaming - How to Remove
It is also better to check the diameter of the return line to the gear box also.
RE: Gearbox Oil Foaming - How to Remove
if you have any 21000RPM moving parts coming in contact with the oil in your carter, you will allways have foam. if you have space you can increase the carter volume to give more time to the bubles to disapear, or have an external tank to increase the amount of oil without running out of space.
hope this helps.
RE: Gearbox Oil Foaming - How to Remove
RE: Gearbox Oil Foaming - How to Remove
What oil does the manufacture recommend ?
Have the oil analysised, contact your oil supplier, they often will do this for you. The oil compinies have engineering staff that should be able to assist you.
Also, there are special additives that can help with foaming, again check with your lubrication company.
A breather is a definate need.