Mechanical seal of the maintenance of common sense

Mechanical seal is made up of two pieces of sealing element ( Static ring and ring) Perpendicular to the axis, light and straight appearance each other nicely, and relatively rolling and sealing devices. It depends on the pressure of sealing medium in rotary dynamic cyclization static ring touching appearance ( End face) On proper clamping force, make the two ends together, established between end face mechanical seal with a thin layer of liquid membrane in order to seal intentions. This layer of liquid membrane, mechanical seal fluid dynamic pressure and static pressure plays a smooth and balance effect. 1. Clean and examination of the mechanical seal 1) The operation principle of mechanical seal mechanical seal request inside without any impurities. In front of the assembled mechanical seal to fully clean the ring and static ring, shaft sleeve, etc. 2) View the dynamic existence appearance isn't scratch, crack, fault, these shortcomings exist form mechanical seal leakage serious. Conditional can use a special tool to check the sealing surface is flat, sealing surface is not flat, pressure water will enter the assembly of mechanical seal dynamic ring sealing surface, will ring space, dynamic mechanical seal failure. When necessary to make tooling before assembling the water pressure experiment. 3) To check the dynamic ring does affect the sealing flawed. Such as dynamic loop with dynamic seal cooperate to look whether exists faults. 4) Check the mechanical seal counter is spring deformation, damage and tenacious coefficient is changed. Usually indicates that seal face weeks by uniform sealing surface peripheral speed rate. Peripheral speed is higher than 25 m/s seal is usually attributed to high speed seal, about high-speed seal, in order to avoid the influence of centrifugal force and mixing hot, should choose to stop the seal. Peripheral speed is high, the high pV value, can choose the way such as center ring decreased peripheral speed, or choose fluid dynamic pressure seal or fluid static pressure seal.