Reasons for shaft wear in the NYP160 internal ring gear pump
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This pump is used in the tank area as a feed pump for crude oil; it has a power rating of 11 KW and a pressure of 0.6 MPa. It has been functioning well all along. Recently, a white clay tank was added to the unit to filter the crude oil. This pump is used to pressurize the clay tank for feeding; the inlet pressure is 0.5 MPa, while the outlet pressure is 0.2 MPa. These past two days, this pump has been making a lot of noise. After taking it apart, I found that the copper sleeve on the pump cover was worn away; the shaft used for starting the pump was worn down by half, and there was also a layer of wear on the pump cover itself. What could be the cause of this? How to handle it? Please ask an expert for advice.
It’s probably caused by too high inlet pressure; the high pressure exerts force on the gears and in the axial exit direction, resulting in wear of the shaft sleeves
If the inlet pressure is higher than the outlet pressure, then what’s the need for a pump?
Use this pump to feed the crude oil, then send it to the clay tank, and finally to the crude oil buffer tank. The inlet pressure of the clay pot is higher than the outlet pressure of the gear pump – is the gear pump grinding dry?
The inlet pressure of the clay pot is higher than the outlet pressure of the pump; how can the pump deliver fluid into it?
So how can it be improved? Recently, Baitu Guan went to Baitu and porcelain balls twice.
The situation you mentioned is unlikely; focus rather on the radial forces acting on gear pumps. Due to the presence of high-pressure and low-pressure areas in gear pumps, the difference in pressure causes radial forces on the gears. In the case of external gear pumps, the outlet area is generally smaller than the inlet area. Internal engagement may require capillary unloading grooves on the side end caps. Since I work on centrifugal pumps, I’m not particularly familiar with the specific structure of gear pumps