Assembly of complex mechanical seal for vertical multiple stage pump

Abstract

Complex mechanical seal for vertical multiple stage pump comprises: a hollow cylinder fixed plate positioned in the final stage of outlet gate in the vertical multiple stage pump, it is coupled with an inner wall surface of fixed barrel to form a sealed face, the bottom hole of fixed barrel is used the passage of pump axle; a long axle bushing in the inner part of the fixed plate is fixed on the pump axle; a balance plate is positioned below long axle bushing and combined with said long axle bushing becoming one part of it, the circumference of balance plate has a promotion flange to divide with the inner wall surface to form a gap; the mechanical seal is fixed on the upper place of the balance plate and fixed on long axle bushing; and a return water passage which communicated with the upper part of balance plate and connected to inlet of pump, thus within the fixed plate, the high pressure region A and low pressure region B formed at the lower part and upper part respectively are need as the pushing force of the balance axle. Simultaneously, the complex structure of balance plate and mechanical seal is more easily and quickly in assembly and disassembly.

Dependencies are inferred from the claim text.