The pressure of the control oil in the turbine rises very slowly
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The drive motor for the recycle hydrogen compressor in our plant is an NK25/28 model from Hangzhou Engine Co., Ltd. During the process of establishing the oil system before starting up, the rise in oil pressure is very slow; it takes 2 hours or even longer for the oil pressure to reach its normal level of 0.86 MPa. The oil pressures in the other oil systems can all be established normally. Since it does not affect usage and only impacts driving time, the oil pipelines have never been examined carefully; a brief check of the pressure tap valves also revealed no throttling. I wonder if anyone has encountered such a situation? Where should I start checking?
What’s the situation? It usually takes just a few minutes
Is there a place where oil returns that wasn’t noticed?
Check if the pressure sensing area is blocked
If both the valve and the pressure guiding pipes are in good condition, is it related to the refueling of the high-level oil tank?
Start checking from the point where the control oil and lubricating oil are separated
I think it might be a throttle issue; I’m not sure if the feedback mechanism has been touched
The oil returns too quickly, resulting in slow pressure buildup.