What are the replacement methods of horizontal pipeline centrifugal pump seal?

The method of replacing invalid mechanical equipment seal of horizontal pipeline centrifugal pump:

(1) Prepare the operating table for placing pump parts and special tools for disassembly, and avoid random stacking and abuse to prevent damage to pump parts.

(2) Make sure that the motor is in the maintenance state before disassembly; Unscrew the oil plug and suck out the grease in the sealing seat cavity with a plastic suction pipe.

(3) Disassemble the rational number coupling: directly unscrew the fixed hexagon socket head cap screw of the coupling, and then gently pull half of the coupling from the shaft gradually. Use an open-ended wrench to unscrew the anchor bolt and stop of the pump shaft, let the centrifugal impeller gradually move to the pump casing, remove the other half of the coupling, and get the flat washer of the pump shaft.

(4) Remove the seal seat: unscrew the seal seat compression nut, gently remove the seal seat and clean it.

(5) Disassemble and clean the bearing seat of the horizontal pipeline centrifugal pump: first loosen the bearing seat gently, lift up the bearing seat with the disassembly and assembly anchor bolts, and lift it upward along the pump axis and remove it; Clean the rolling bearing and seat with jet fuel, dry it before installation and apply a small amount of No.20 mechanical lubricating oil for lubrication and maintenance.

(6) Disassembly and assembly of mechanical equipment seal: grasp the sealing torsion spring and lift it up along the pump axis to disassemble and assemble.

(7) Mechanical equipment seal installation: apply a layer of clean No. 20 grease on the mirror glass of the moving and static rings; Apply grease to the guide bearing seat, and directly install the static ring into the guide bearing seat gently and accurately. Then apply grease to the pump shaft, gently install a part of the moving ring of the mechanical equipment seal into the pump shaft, and gently push the seal ring with your hand to make it large or small.

(8) Install the sealing seat: first install the rubber oil seal on the sealing seat, then install the sealing seat into the pump cover and press the bearing seat to tighten the nut.

(9) Install the coupling: first install a flat washer on the top of the motor shaft head, install half of the coupling, then install a stopper on the pump shaft end and the coupling groove body, and tighten the anchor bolt with an open-ended wrench; Then install the other half of the coupling and screw on the hexagon socket head cap screw. Be sure to tighten it tightly. Requirements for correct inspection of assembled coupling: balance the left and right gaps of rational coupling; It is convenient to check the rotation by turning the coupling several times by hand.

(10) The horizontal pipeline centrifugal pump shall be tested according to the application key points to check whether the mechanical equipment is sealed or not and whether the pump unit is operating normally.