High pressure multistage pump rotor shaft is to fine positioning device

High pressure multistage pump rotor shaft is to fine positioning device, balance drum's left side is provided with the mechanical seal subassembly, constitute the pressurization chamber between mechanical seal subassembly and the pump cover, the mechanical seal subassembly compresses tightly on the pump shaft through mechanical seal press cover, mechanical seal press cover fixes on the inner wallof pump cover, the left end of mechanical seal subassembly, the cover is equipped with the adjustment spacer on the pump shaft, the left end of adjustment spacer is through dividing half positioning ring restriction displacement, divide the half positioning ring to fix the shaft shoulder department at the pump shaft through tightening ring, tightening ring fixes the left side of sealing the seizeware at the machine, will be originally setting up the adjustment spacer antedisplacement in thrust disc department, and setting up and seal seize ware end at the machine, the independent function ofonly adjusting impeller cen