First of all we have to get to know mechanical seal should do the preparation work before and after the maintenance:
Mechanical seal of the preparation work before installation and the matters needing attention.
1.Iif the upgrade, please check the mechanical seal model, the specification is correct, the quality is in accordance with the standards;
2.Static ring tail anti-rotating groove end and stop pin at the top should keep 1 mm - 2 mm axial clearance, lest the buffer failure;
3.Dynamic and static ring end face wash clean with alcohol, and the rest of the metal parts with gasoline and clean compressed air to blow dry cleaning, carefully check business heart guarantee the dynamic and static ring sealing surface without any damage.Before assembly, two pieces of "0" rubber seal should be coated with a layer of lubrication oil, dynamic and static ring end face no oil.
Mechanical seal installation sequence and matters needing attention.
1.The relative position of the rotor and the pump body is fixed, determine the installation position of mechanical seal, according to the installation of the seal to the size and the position of the static ring in the gland, measure the seal on the shaft or sleeve positioning size;
2.Install the machine sealing ring, ring after installation shall be guaranteed to its flexible on the shaft to move;
3.Wwill the assembled static ring and ring assembled;
4.The sealing end cover is installed in the seal, and the screw.
Mechanical seal is composed of high precision parts, under the condition of correct and reasonable use, sealed performance is good, but because of its using conditions is very complex, coupled with the sealing structure is more complex, the performance of the mechanical seal are easily damaged, so the reasonable maintenance and disassembly and assembly of mechanical seal is very important.So what mechanical seal remove the need to pay attention to?Please look at:
Mechanical seal sealed, matters needing attention.
Mechanical seal of the disassembly sequence is opposite to the sequence of installation.In the process of demolition of the mechanical seal must be carefully, can't use, with flat hammer, tapping machine, can't can't damage the machine moving and static ring sealing surface, if because of too much grease and other dirt, can remove, must be made after the first wash clean with kerosene, etc and then remove, so as to keep the machine to seal the parts in good condition.
Mechanical seal repair request and process.
Break off the plane after sealing, first inspection on organic seal installation of pump body, must meet the following requirements:
1.The maximum 0.05 mm or less shaft bending, axial channeling momentum is 0.05 mm or less;
2.Ring seal to beat 0.01 mm or less;
3.Install the machine seal parts of the surface roughness of the shaft or the shaft sleeve is 1.6 microns, and static ring sealing surface contact with the surface roughness of 3.2 microns;
4.Then repair mechanical seal:
(1) Check each component of the mechanical seal.All components shall be complete, nondestructive, dynamic and static ring sealing surface without defects such as scratches, damaged, if found to have damaged, shall be repaired or more replacement seal;
(2) Check whether the elasticity smaller, if smaller then must replace the spring;
(3) Check the seal body wall, seal end cover inner surface without damage, if discover the problem timely maintenance.