What is the minimum speed of a gear oil pump?
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It is possible for a gear pump to operate at 120 r/min. A lubricating oil pump is now required; the crankshaft to which it is connected rotates at a speed of only 110–130 r/min. It is feasible to use a lubricating gear oil pump with a flow rate of 6.4 L/min, a maximum output pressure of 0.3 MPa, and a volumetric efficiency of only 50%. So, can this gear pump operate?
Firstly, the pressure generated by this gear pump is related to its speed. Then, achieving this rotational speed is accomplished through a gearbox connected to the main engine; the structure of this gearbox, as well as that of the gear oil pump, require specialized design considerations regarding their layout and gear ratios. That’s a pretty big request of you; I guess someone might take on this task in exchange for several months’ worth of your salary. It’s unlikely that a random question here will solve the problem.
This post was last edited by lcmqh@163.com on 2019-6-10 at 20:25. The gear oil pump is a positive-displacement pump; the pressure is not proportional to the pump’s speed, but rather depends on the gap between the pump components. The flow rate isn’t very high, so it should be easy to achieve 120 r/min. You can conduct simulation experiments and leave some margin before making the final configuration. It’s not professional; please forgive any imperfections!
It’s possible; just keep the outlet unobstructed. The outlet pressure of a gear oil pump is not related to its speed, but rather to the pressure in the outlet pipeline.
Now this problem has been resolved; the shaft-mounted gear pump we developed works perfectly at 120 R/MIN. Since it is a lubrication pump, we stopped the experiment when the pressure reached 0.6 MPa ； Based on the test results, it is feasible even if there are only 50 revolutions without any division ； Thank you all for your replies and answers ；