China Sealcon Company

Development Trend of Seals

With the increasingly harsh conditions of the use of mechanical products, higher requirements for the use of rubber sealing products are required. The use of rubber seals in aerospace, oil and mining industries, construction machinery and transportation industries, and energy industries often adapt to a wide temperature environment and harsh
environment such as high pressure sand and dust. According to the 1984 International Rubber Conference information, the using conditions for lip-type packing of rotation axis in automobiles and tractors have grown considerably. Due to the changes of usage conditions, the consumption of special rubber will increase continuously, and new types of seals will be required to improve the service life and reliability of the seals. The system pressure of the reciprocating dynamic seals is generally below 20MPa. The system pressure of high performance combination seal used in the aerospace and aviation industries can reach 56 MPa. At this point, the maximum operating speed is 1m/s. With the development of China’s economic construction, the requirements for the development of seals used in environments such as alpine, desert and underwater have been proposed. Extrusion seals: extrusion seals, especially O-rings, have always been widely used in seals. Other types such as X-type, T-type, D-type, square, triangular and other types, are suitable for different applications. The direction of improvement is to make its sealing performance stable and reliable, improving its pressure resistance and reducing friction. So that it can also be combined with low friction plastics such as polytetrafluoroethylene, nylon slip ring and support ring to form a combined seal. Improve its pressure resistance and reduce friction. Some manufacturers have licensed products at the speed of 7.5m/s and seal pressure of 5.6MPa.

Reciprocating lip seal: The reciprocating lip seal, which is also known as lip liner or seal cup, is widely used for hydraulic seals in hydraulic systems. This sealing surface is lip-shaped, with minimal interference during installation, making the lip fully in contact with the sealing surface to produce a sealing effect. When the oil cylinder is working, its contact force and contact area increase as the pressure increases, so that the sealing ability is improved. In the return stroke of the cylinder, the pressure is low, and the contact area and friction are lower than the working stroke, so the respiration is generated and the lip is lubricated.
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