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Structural characteristics, classification and application of X-type rubber sealing ring

Release time:

2019-05-06 12:30

Source:

Structural characteristics, classification and application of X-type rubber sealing ring
 
Star seal ring is one of the common seals in hydraulic machinery equipment, with a typical four lip sealing structure, so it is also called X-ring (star ring).
In the hydraulic piston or hydraulic piston rod seal using star seal ring can obtain a good sealing effect, in low pressure conditions, need to rely on the lip of the amount of interference deformation and produce sealing effect. Secondly, because the contact surface of the lip is too low, the friction force is also too low. With the increase of pressure, the deformation of the elastic material of the sealing lip increases after pressure stretching, compression and bending, so that the radial pressing force of the rubber sealing ring automatically increases and the contact length with the sealing surface increases continuously until the entire axial length of the rubber sealing ring contacts the sealing surface, thus ensuring good sealing performance under high pressure.
What are the application areas of 1. star rubber seals? Such seals are widely used, but are generally mainly used in dynamic seals, such as sealing reciprocating pistons, piston rods, plungers, and sealing swing, rotation or spiral movement of the shaft or mandrel. Static seals are generally used for radially stationary parts, such as sleeves, end caps, pipes, and axially stationary parts, such as flanges and covers. By selecting materials with different characteristics, it is possible to seal all liquids, gases and chemicals in time.

What are the characteristics of the design structure of the 2. star seal ring? X-ring can completely replace the use of O-ring, because of the flying round seal section, in the process can avoid the rolling phenomenon of hydraulic reciprocating motion, so that the seal performance and application to improve the sealing effect.

The working principle of the 3. star rubber seal ring? X-type rubber seal ring is a double-acting seal with its own elastic sealing ability. The radial or axial contact stress generated by the pre-compression during the initial installation is superimposed with the system pressure to achieve the sealing function. The sealing force after superposition increases as the system pressure increases. Under pressure, the star seal ring, like a fluid with high surface tension, can transmit the pressure evenly to all surfaces.

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