Questions about multi-stage pumps
Thread Content
I have two questions for experts: 1) D-type multi-stage pumps use a balance disk mechanism, with the rotor floating back and forth. How is it possible to control the amount of movement of the mechanical seal? 2) What are the technical differences or requirements between slurry multistage pumps, mining multistage pumps, and ordinary multistage water pumps? Thank you!
Regarding the position of the working clearance of the balance disc
The running serial momentum is not that large; the position at the time of contact with the balance disk serves as the reference
In terms of the principle of the balance disk, there is a series effect; in actual operation, when the operating conditions are stable, this series effect is very small. Moreover, the serial flow cannot be absorbed by mechanical seals; it is absorbed by thrust bearings. These are personal opinions and not necessarily correct.
The serial data size is related to three factors, one of which is the stability of the operating conditions. Second is the pressure level of the same flow pump. Third is the size of the balance tube. The balance disc uses internal pressure to force water out of the gap in the balance disc and send it to the pump inlet. The working principle is simple, but the above three points are crucial. Imported pumps perform well because they are backed by a comprehensive set of theories and extensive test data. Many domestic pumps are designed to be difficult to tamper with, and there are very few that actually go through testing platforms to generate theoretical and practical data on shaft movement.
What profound insights; you must come from the manufacturing industry
This pump needs too many repairs! Prolonged illness makes one a good doctor – experience is key. The more you know about pumps, the better you understand their performance. Now, we are upgrading pumps to improve energy efficiency. Currently, over 90% of domestic pumps have more than 20% room for energy savings. If you have a circulation pump, you might want to give it a consideration; we will cover the initial investment, and we will only charge for the energy savings over two years. Imported pumps are used.
Under normal conditions, the axial movement of the balanced rotor string does not exceed 0.2 mm, which has almost no impact on the mechanical seal!
The boiler feed pump manufacturers here simply don’t do a good job; problems with the pump shaft pushing against the motor occur frequently
Personally, I think the allowable play for your mechanical seal should be greater than that of the shaft