Is the oil return color different for the compressor gearbox and the bearing housing?
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As shown in the figure, for the fan of the catalytic unit, the one close to the camera is the oil return viewing window of the gearbox, while the one a bit further away is the oil return of the bearing box. Why are the color and transparency of the return oil so different?
Bubbles in the return oil of the gearbox are caused by the gears agitating the lubricating oil and air. After the lubricating oil returns to the tank, air bubbles are removed. It is functioning normally and does not affect use. If you still have doubts, you can take a sample and let it sit to see.
The third floor is correct; it’s due to the bubbles created by the gears.
The third floor is the correct answer; both temperature and bubbles are factors that have an impact, but I think bubbles have a greater influence here.
It’s caused by bubbles; when it stops, the color returns to being uniform, and changes can also be observed during the process of the rotation speed decreasing gradually when the machine stops