China Sealcon Company

Basic Components and Functions of Mechanical Seals

1. Dynamic and static rings

The sealing surface shall be tightly adhered to prevent medium leakage. It is required that the moving ring and the static ring have good wear resistance. The moving ring can move axially and automatically compensate for the wear on the sealing surface of the mechanical seal to make it fit well with the static ring. The static ring has buoyancy and plays a buffering role.

2. Elastic components (spring, corrugated plate, snake sleeve, etc.)

It mainly plays the role of compensation, pre - tightening and buffering, but also is the factor of mechanical seal sealing surface to produce a reasonable pressure. Elasticity is always required to overcome friction between the auxiliary seal and the drive, and the starter ring compensates. The material is required to be corrosion resistant.

3. Auxiliary seal (0-ring, v-ring, wedge ring and other special-shaped seal ring)

It mainly plays the sealing role of static ring and the moving ring, also plays the floating and the buffering role. The auxiliary sealing elements of the static ring are required to ensure the sealing between the static ring and the gland, so that the static ring has a certain degree of buoyancy. The auxiliary sealing element of the moving ring ensures the sealing between the moving ring and the shaft or shaft sleeve. The material shall be close to the medium in heat and cold resistance.

4. Driving medium

The mechanical seal transmission part includes the transmission pin, the transmission ring, the transmission seat, the transmission sleeve, the transmission key, the transmission lug or the tooth inserts type coupling. Its function is to transmit the shaft torque to the moving ring. Materials shall be resistant to corrosion and wear.

5. Fastener

Mechanical seal fastening parts include: set screw, spring seat, gland, assembly sleeve, shaft sleeve. It plays the positioning, fixation role of static ring and moving ring. Correct positioning is required to ensure that the friction pair sealing surface is in the correct position, and maintain a good fit of the spring specific pressure. At the same time , easy disassembly and assembly, easy positioning, repeat use is required. In the joint with the auxiliary seal, we shall pay attention to the chamfer angle and the pressure spring of the sealing ring. Pay special attention to corrosion and wear resistance in the movable ring seal ring and axle sleeve joint. If necessary, we can use hardfaced cladding.
Related News
  • Sealing Sense

    Sealing Sense

    November 29, 2017Thermal growth rate differences of head flanges, tube-sheets, bolts and gaskets create an upset of the gasket-flange interface and a loss of seating stress on the gasket that can cause flanges to leak...view
  • Classification Of Rubber Seal Ring

    Classification Of Rubber Seal Ring

    May 4, 2018There are all kinds of rubber seal rings in rubber seal factory. According to the ssutting shape, it can be divided as follows:O seal ring series (DSH seal series)It has many kinds of products, such a...view
  • Leakage Analysis And Maintenance Of Mechanical Seal

    Leakage Analysis And Maintenance Of Mechanical Seal

    May 4, 2018Leakage analysis and maintenance of mechanical seal1. Repair of mechanical sealMechanical seal flygt pump do not need special tools and materials for maintenance. Generally speaking, mechanical seals ...view
  • Common Problems In Mechanical Seal Pump

    Common Problems In Mechanical Seal Pump

    May 4, 2018The following are several common failure about the seal of mechanical seal flygt pump:(1). Leakage during installation of static test. After the mechanical seal is installed and debugged, the static p...view
  • The Mechanical Seal Of The Pump

    The Mechanical Seal Of The Pump

    May 4, 2018The mechanical seal of the pump is the material or part that prevents the leakage of fluid or solid particles from the adjacent surface and prevents the external impurities, such as dust and water, in...view
  • Sealing Technology

    Sealing Technology

    May 4, 2018Sealing technology mainly refers to the use of a certain combination of sealing materials, sealing elements and the corresponding seal structure form, to prevent or cut off the mass transfer process b...view