screw vacuum pump of adjusting oil volume skill

Users who have used the screw vacuum pump know that there are many matters needing attention when using it. How much do you know about the skill of adjusting the oil quantity when using it? The following is a detailed introduction:

Screw vacuum pump by appropriate backwards starting point and end point in advance to meet the requirements of reducing fuel injection quantity, so it can control the combustion process, no matter in both low and high load on the check point near. This method is suitable for Marine diesel engines with high pressure and variable speed and load.

When the screw vacuum pump works, the starting time of oil supply remains the same, while the ending time of oil supply is changed due to the change of the position of the slant of the plunger against the oil hole of the plunger sleeve. With the different Angle of plunger rotation, the effective travel of plunger is different, so the oil supply is also changed.

Plunger for oil supply a rotation Angle, the greater the column inserting end face to open the hypotenuse on plug set of oil return hole distance, the greater the oil was greater, if the plunger rotation Angle is small, the broken oil started earlier, oil is also small. When the diesel engine stops, the oil must be cut off. For this reason, the longitudinal slot on the plunger can be turned to the upper return hole facing the plunger sleeve.

At this point, in the entire piston stroke of the screw vacuum pump, the fuel in the plunger sleeve has been flowing back to the oil channel through the longitudinal groove and oil return hole, and there is no oil pressure process, so the oil supply amount is equal to zero. When the plunger turns, the oil supply is adjusted by changing the end point of the oil supply.

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