NEWS
O-ring sealing principle is designed with formula
Date:
2022-09-29
Source:
The O-ring rubber seal is a rubber product with a circular cross-sectional area. Its applications are in the fields of chemical industry, machinery, coal, petroleum, metallurgy, transportation, household appliances and so on. O-ring is a kind of sealing element with large production quantity and wide application among all rubber sealing products.
1. Performance and application of O-ring rubber seal
O-shaped rubber seals are widely used in various mechanical equipment, and play a sealing role in different temperatures, pressures and media to prevent oil leakage, air leakage, water leakage and intrusion of external environmental media and dust. Compared with other rubber seals, it has the following advantages:
Advantages of O-ring rubber seals:
1. Simple structure, small volume and compact installation location.
2. It has the function of self-sealing, no need for periodic adjustment.
3. Good sealing performance, no leakage during static sealing.
4. The movement friction resistance is small, which is suitable for occasions where the pressure is alternating.
5. The size and groove have been standardized, the price is cheap, the product is easy to obtain, easy to use and buy.
6. Strong adaptability and wide range of uses.
Disadvantages of O-ring rubber seal:
1. When used to compress the dynamic seal, the starting frictional resistance is large.
2. It is difficult to prevent leakage during dynamic sealing, and only the amount of leakage can be controlled to not meet the specified allowable value.
3. In the process of air pressure and water pressure sealing, lubricating oil needs to be added to prevent wear. In some occasions, it is often necessary to add dust-proof and protective retaining rings.
4. The processing size and precision of the dual mating parts (such as moving surfaces, grooves, gaps, etc.) are strict.
According to the relative motion state of the O-shaped rubber sealing ring and the sealed device, it can be divided into O-rings for static sealing, O-rings for reciprocating sealing, and O-rings for rotary sealing. According to the sealing structure, it can be divided into two types of O-rings: radial seal and axial seal.
The material for making O-ring rubber seals is mainly synthetic rubber. Depending on the working temperature, contact medium, and pressure, the selection of rubber types is also different.
keywords:
O-ring,rubber
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