Will the pressure in the pump body of 7MPa cause the turning plate to not move?
Thread Content
There is a pump that was easy to turn when it was just repaired. After connecting the pipe, the pressure inside the pump will rise because the outlet valve will not close. Now with the valves closed, the pressure inside the pump is already 7MPa. At present, the cranking disk does not move. Some people say that the pressure in the pump is too high, which makes it impossible to crank. I would like to ask some experts to give their opinions on this point.
This is the alignment data. It was still possible to crank the car at that time. When the coupling was installed, the cranking was also normal.
Have you ever encountered such a high pressure situation? Has the medium in the pump solidified at low temperature?
The medium temperature is 20°, so the temperature change can be ignored?
It is an oil medium and will not solidify.
To add, this pump is a double-support pump.
This post was last posted by 3983596_FPPZ on 2019-1-14 08:06 Cantilever pump in the editorial meeting: 1. Large inlet static pressure will cause large shaft end force. This axial force should be considered when calibrating the bearing. If the bearing positioning clearance is not accurate and firm, it will cause the shaft to move backward, causing the parts with small axial clearance in the pump to jam, such as the back blade. ； 2. Large inlet static pressure will cause the bearing balls to deviate to one side, the clearance of the bearing itself disappears, and the balls are under pressure. ； 3. When the dynamic and static rings of the mechanical seal are pressed together, the turning plate will not move. Double support pump: Large inlet static pressure will cause the dynamic and static rings of the mechanical seal to be pressed together (even the balanced seal is no exception), causing the car to become immobile. Before placing a normal order, the pump factory with large inlet pressure has already considered the selection of mechanical seals.