The end face structure, product development and application of liquid film mechanical seal-

The end face structure, product development and application of liquid film mechanical seal

　2018-08-07　　

The end structure, product development and application of liquid film mechanical seal:

So far, the liquid film seal end face structure types that have been developed mainly include 4 types shown in Ge 3-13, among which spiral groove types include spiral grooves, arc grooves, straight grooves, curved grooves, etc. Because of its best performance such as fluid flow efficiency or frictional power consumption, it is the most common application.

The non-contact liquid film mechanical seal is divided into zero leakage liquid film seal and zero escape liquid film seal, which can be used as a rotary type for conveying various media (such as oil, aqueous solution, etc.) whose saturated vapor pressure is lower than the ambient atmospheric pressure Pump shaft seals, parking seals, backup seals, safety seals, high-speed bearing lubricating oil seals, and can be used as shaft seals for rotary pumps to transport various media with saturated vapor pressure higher than the ambient atmospheric pressure (such as liquid light hydrocarbons, etc.). It can replace ordinary contact double end face seal. American John Crane Sealing Company has successfully developed the 8000 upstream pumping seal series products, and gradually popularized and applied them in the industry. It is believed that the industrial application prospects of upstream pumping seals will be very broad.

Figure 3-13 Sealing end surface structure for upstream pump

108u mechanical seal 　　936.html,

Technical advantages of liquid film seal 　　 the choice of liquid film mechanical seal