High-speed pump sealing
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What is the form of the sealing assistance system for high-speed pumps at Beihang University, and what is its principle? I would appreciate some guidance from experts. In some cases, the auxiliary sealing system cannot be seen from the outside, while in other cases there are multiple 52 units
It is determined by the medium: high-risk pumps dealing with toxic, harmful, flammable, and explosive light hydrocarbons generally use the 52 system. If the medium leakage is harmless, simple sealing is sufficient.
Some of them have 52 plus 11, while others have 13. What on earth is 13? Moreover, no structure can be seen inside the pump chamber
What does 52 refer to regarding the flushing method? Add isolation fluid?
Managing such equipment involves adding an external circulation flushing system to the mechanical seal; there is a flushing fluid tank used to store the flushing liquid, which is usually a clean liquid that poses little hazard, has a high boiling point, and can mix with the medium being transported； There is a pressurization port at the top of the flushing fluid tank; the pressurizing medium can be a stable gas such as nitrogen. The pressure is set to be slightly higher than the pressure inside the sealed chamber, and this value can be calculated ； Then there are the pipes connected to the sealed chamber, one for inlet and one for outlet ； The flushing fluid circulates on its own within the flushing system due to siphoning effect (heat generated by the operation of the mechanical seal) and the rotation of the pump shaft, thereby achieving the purpose of lubricating and cooling the mechanical seal.
Do you know what shape 13 is? Some high-speed pumps come in the 13 format
It can be found online; search for articles titled “API Sealing and Flushing Solution” on Baidu Wenku, and once you find it, look for PLAN 13. I didn’t download the coupon; otherwise I would have downloaded it for you.
I just took a look; is it something like this: the medium used for pumping serves as the sealing coolant, which is introduced from the high-pressure area of the pump chamber into the sealing chamber to flush the mechanical seal, then passes through a throttle orifice plate, and finally returns to the low-pressure area of the pump chamber (at the pump inlet).
Isn’t that 11? 13 shouldn’t be visible in a high-speed pump; it’s inside the pump chamber