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Dongguan Minz Rubber & Plastics Co., Ltd.

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Star-shaped sealing ring small common sense

Release time:

2019-06-10 12:30

Source:

Star seal ringLittle common sense
 
Star seal ringThe sealing form is double lip seal, its shape is X, so the outside world can also be called X-ring. This seal ring is used in the hydraulic system. Its hydraulic seal is built on the basic performance of the O-ring to make better improvement and innovation. Its standard size and specification are completely the same as the American standard O-ring specification, which can replace most hydraulic seals (O-ring) working conditions.
 
Star sealing ring sealing material: nitrile rubber, fluorine rubber, silicone rubber; Technical parameters of star sealing ring: O-ring working pressure: 30MPa reciprocating speed: ≦ 0.5 m/s operating temperature:-30 ℃- 200 ℃ applicable medium: hydraulic oil, steam, water, etc;
 
Star seal ring features:
1. Compared with the O-ring, because the star-shaped sealing ring forms a lubricating mouth between the sealing lips, it has the resistance to reduce friction and start;
2. Because the flash of the sealing ring is located in the recess of the section, the sealing effect is very good;
3, the second non-circular cross-section, can avoid the rolling phenomenon in the process of reciprocating motion; star seal ring mechanism: star seal ring is a self-tightening seal type double-acting sealing element. The radial and axial force depends on the pressure of the hydraulic system. The greater the pressure, the greater the compression deformation of the star seal ring, and the total sealing force increases, thus forming a high-quality and reliable seal.
Star seal ring
 
Star seal ring is the most commonly used in a hydraulic cylinder seal, it is a typical lip seal, the pressure distribution on the section is uniform, the sealing effect is good, so the piston or piston rod can get good sealing effect. However, in the case of low pressure, the U-shaped sealing ring relies on the interference deformation of the lip to produce a seal. Because the contact area of the seal is small, the friction force is relatively low, and the pressure increases, the elastic deformation of the lip of the sealing ring also increases, the tensile, compression and bending stress increases, the radial pressing force of the U-shaped sealing ring will automatically become larger, and the length of contact with the sealing surface will continue to increase, until the entire shaft length of the U-shaped ring is in contact with the sealing surface, thus achieving good sealing performance. Star seal ring is widely used, mainly for dynamic sealing. The star seal ring is a double-acting seal with elastic sealing ability. The radial or axial contact stress is generated by the pre-compression during the initial installation and the system pressure is superimposed to realize the sealing function. The superimposed sealing force increases with the system pressure. Under pressure, the star seal acts like a fluid with a high surface tension. The pressure can be evenly transmitted to each sealing surface. The radial stress required by the star seal ring is smaller than that of the O-ring, the friction is small and the life is long, so it can completely replace the O-ring, non-circular section, and avoid rolling.
 

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