For gear pump mechanical seal

Mechanical seal is also called the face seal ( Mechanicalseal) , use dynamic seal is the axis of rotation. Mechanical seal performance and reliable, small amount of leakage, long service life, low power consumption. Need not often maintenance, and can be adapted to the production process automation and high temperature, low temperature, high pressure, vacuum, high speed and strong corrosive medium. Solid granules medium harsh conditions such as hungry containment requirements. Mechanical seal is to rely on a couple or a few to make relatively smooth move perpendicular to the axis of end face in fluid pressure and compensation mechanism of elastic * ( Or magnetic force) Keep the role under combined with auxiliary seal resistance, due to leakage of the shaft sealing device. For gear pump mechanical seal, mechanical seal and soft packing seal are as follows: advantage: ( 1) Reliable sealing and sealing state in the long run is stable, leak amount is very small, it reveal that about 1% of the soft packing seal: ( 2) Long service life, in the oil, water medium generally can reach 1 ~ 2 years or longer. More than half a year of work: (in the chemical medium 3) Clean power consumption is small, the friction power is only 10% ~ 50% of soft packing seal ( 4) The shaft or the shaft sleeve is basically no friction losses: ( 5) Maintenance cycle is long. End face can automatically compensate after wear, generally do not need regular maintenance: ( 6) Good vibration resistance, the vibration of the axis of rotation and axial deflection of the sealed cavity insensitive: ( 7) Applicability is wide and mechanical seal can be used for high temperature, low temperature, high pressure, vacuum, different rotating frequency, as well as a variety of corrosive medium and seal containing abrasive medium. Disadvantages: ( 1) More complex, high requirements for processing, 2) Installation and replacement more troublesome, requirement worker must have technical level ( 3) Accidental accident occurs, processing more difficult. The preparing work before sealing: (and high prices 1) Check the mechanical seal type. Specifications and design drawings requirements, so the parts ( Especially the sealing surface, auxiliary seal) Presence of lesions. Out of shape. The phenomenon such as cracks, if flawed, and must be replaced or repair ( 2) Check the mechanical seal parts fit size, roughness, parallelism is in line with the design requirements, 3) When using a small spring mechanical seal, should check whether the length of the small spring and rigid (same 4) Check the host of the momentum. Momentum and round degree meets the technical requirements and sealed cavity is in line with the installation dimensions, sealing cover and shaft is vertical, general requirements: axial momentum is not more than plus or minus 0. 5 mm: shaft throwing ( Rotating ring seal) Not greater than zero. 06 mm: shaft around the biggest degree is not greater than zero. 05 mm: sealing cover and gasket contact surface is not perpendicular to the centerline to allow poor 0. 03 ~ 0. 05mm( 5) Should be kept clean, especially the rotating ring and static ring sealing surface and auxiliary seal surface should be without impurities. Dust. Not allowed to use not clean dry sealing surface polishing. ( 6) Tap on a packing element is not allowed to use tools. In order to prevent the seal is damaged