Mechanical seal failure to take measures to deal with

If the mechanical seal parts fails, you need to replace parts or increase machining precision parts, precision mechanical seals to improve the precision and the pump itself, other components of the mechanical seal is very favorable. In order to improve the sealing effect of the movement of the ring and the friction surface finish roughness higher. Width of the friction surface of the ring movement is not, generally between 2 to 7 mm.
Mechanical seal vibration, heat treatment
If the gap between the sealing ring and the movement of the small chamber, the inner diameter of seal chamber should increase or decrease the outer diameter of rotation, a gap of at least 0.75mm guaranteed. If the friction pair is improper, it is necessary to change the static ring material to temperature, corrosion resistance. This will reduce the mechanical vibration and heat sealed.
Handling mechanical seal leakage
Mechanical seal leakage is due to a variety of causes, we have to deal with specific issues. In order to minimize the amount of leakage, must be strictly in accordance with the technical requirements for the installation of mechanical seal assembly, but also pay attention to the following matters.
(1) assembly to be clean and smooth. Mechanical seal parts, tools, lubricants, wiping material to be very clean. Movement ring seal face use a soft gauze wipe. (2) trimming chamfer rounding. Shaft seal cover, such as chamfers to trim and smooth, rounded shaft and cover related to sanding polish. (3) secondary seal assembly, the auxiliary seal rubber gasoline, kerosene can not be soaked and washed to avoid swelling deformation,bolt security seal premature aging. After the static ring assembly, hand pressed compensation loop, checking is in place, is flexible; elastic snap ring is positioned reliable. Ring is installed, you must ensure that it is flexible shaft axial movement.
Shaft channeling large processing
Rational design of axial force balance device, eliminating axial channeling. To meet this requirement, the multi-stage centrifugal pumps, design options are: balance disc plus axial thrust bearing, the balance disc balance the axial force, the axial thrust bearing on the shaft axial limit.
Adding auxiliary flushing system
Seal chamber sealing medium containing particles, impurities must be flushed, because otherwise the precipitated crystals, particles, deposition of impurities, the mechanical seal spring failure, if the particles entering the friction will cause rapid destruction of the mechanical seal. Therefore, secondary mechanical seal flush system is very important, it can effectively protect the sealing surface, played cooling, lubrication, wash away debris and so on.
Pump vibration treatment measures
In the manufacturing assembly process pump products in strict accordance with the standards and procedures to perform, to eliminate vibration source. Pumps, motors, chassis, piping and other auxiliary equipment on site during on-site installation, to strictly eliminate vibration source.
Studied more than simple mechanical seals on rotating equipment applications and emerging fault,metal seals later encountered mechanical seal failure problems, we must first consider the impact factors of mechanical seals itself, and then also consider some factors outside of the mechanical seal. For example: In analyzing the causes of the accident quality mechanical seal, taking into account the impact on other parts of the pump mechanical seal operation, take measures to continuously improve the mechanical seal effect.