Mechanical seal three seal point, the three seal sealing principle is as follows:

    1 ring sealing between the static ring: by the elastic component (spring, bellows etc.) and sealing liquid pressure in the dynamic and static ring ring relative motion of the contact surface (surface) to produce an adequate clamping force (pressure) to end two smooth, flat end surface tightly; to keep a very thin liquid film to achieve sealing effect. This film has the functions of liquid dynamic pressure and static pressure, it plays a role in balancing pressure and lubrication, both ends of the surface height must finish straight to create a perfect fit and ratio end than the uniform pressure condition, which is relatively rotating seal.

    The seal between 2 stationary ring and gland: various shapes of elastic support ring (such as rubber) to prevent liquid leakage from between the static ring and the gland, belongs to the static seal.

    The 3 moving between the sealing ring and the shaft is used: various shapes of elastic support ring to prevent leakage of liquid between the driven ring and the axis. This is a relatively static sealing. But when the end wear, allowing it to move axially wear compensation.

    Mechanical seal and stuffing seal

    A reliable sealing, long service period in will not leak or rarely leakage. Clean, no dead angle, can prevent microbial contamination.

    Two long service life, the correct choice of friction load than the pressure of mechanical seal can be used for 2 to 5 years to 9 years, the longest useful. In the

    Three repair cycle is long, working under normal circumstances, does not require repair.

    Four the shaft or sleeve are not subject to wear and tear.

    Five the friction power loss of small, usually around 10 ~ 50% stuffing seal

    Six mechanical seal on the shaft of the precision and smooth finish without stuffing requirements are so strict, the rotating shaft vibration and shaft deflection on the housing bore is not sensitive to small, shaft vibration sensitivity.

    Seven wide application range, can be used in low temperature, high temperature, high vacuum, high voltage, various speed and corrosive, abrasive, flammable, explosive,

    Sealed toxic medium.

    The working principle of the mechanical seal end face seal (Mechanicalseal), is a dynamic seal for rotary shafts. Mechanical sealing performance, a small amount of leakage, long service life, low power consumption. Without frequent repair, and can adapt the production process automation and high temperature, low temperature, high pressure, vacuum, high speed and strong corrosive medium. Requirements of medium containing solid particles such harsh conditions of the hungry seal. Mechanical seal is by one or several of the vertical axis for moving the end face relative profit in the fluid pressure and the compensation mechanism of the elastic (or magnetic) to maintain access under the merger with auxiliary seal and the seal to the resistance device leakage. Gear oil pump for mechanical seal, mechanical seal and soft packing seal is as follows:

    Advantage.

    1) reliable sealing, sealing condition is very stable in the long run, leakage is very small, its leak about soft packing seal

    2) and long service life, in oil, generally up to 1~2 years or longer in aqueous media. In the chemical medium generally work more than half a year:

    3) clean the power consumption is small, the friction power is only the soft packing seal 10%~50%

    4) the shaft or sleeve basically do not wear:

    5) repair cycle length. End after abrasion automatic compensation, generally do not need regular repair:

    6) resistant to vibration, rotating shaft and shaft deflection on the seal cavity insensitive:

    7) wide application range, the mechanical seal can used for high temperature, low temperature, high pressure, vacuum, different rotation frequencies, and all kinds of corrosive medium and abrasive

    Sealing granule medium.

    Shortcomings:

    1) is more complex, high requirements for processing

    2) and replacing the troublesome installation, require workers to have a certain level of Technology

    3) occurred accident, processing more difficult.