How does the rubber O-ring work in low-pressure conditions?

introduction

Rubber O-ring sealing ring is a common sealing device widely used in various industrial and mechanical fields, especially under low pressure conditions. This article will take an in-depth look at how rubber O-rings work under low-pressure conditions to help you better understand its role in sealing applications.

1. Structure of rubber O-ring seal

The working principle of the rubber O-ring seal is closely related to its structure. It usually includes the following key parts:

O-shaped cross-section: This is the characteristic shape of the sealing ring, which is round or oval and can be compressed and deformed to adapt to the shape of the sealing surface.

Rubber material: O-rings are usually made of rubber materials, such as nitrile rubber (NBR), fluororubber (FKM), silicone rubber (VMQ), etc. Different rubber materials are suitable for different working conditions and media.

Circular cross-section: The circular cross-section of the rubber O-ring seal enables it to form a seal when subjected to pressure and maintain its elasticity, ensuring the sealing effect.

Compressibility: The rubber material of the sealing ring is compressible and can adapt to the sealing surface to form a seal when subjected to external pressure or extrusion.

2. Working principle under low pressure conditions

Under low pressure conditions, the working principle of rubber O-ring seals is very simple and efficient. When a seal is placed between two interconnected parts and no liquid or gas leaks, here's how it works:

Compression Adaptation: When low pressure is applied between the two components, the rubber material of the seal will slightly compress and deform under the action of external forces to adapt to the shape of the sealing surface.

Forms a Seal: The round cross-section and compressibility of a rubber O-ring seal enable it to form a tight seal at low pressure, preventing leakage of liquid or gas. It creates an effective sealing barrier between components.

Prevent the intrusion of external substances: In addition to preventing leaks, the sealing ring can also prevent external impurities, dust, liquids and other substances from entering the sealing area, ensuring internal cleanliness and normal operation.

Elastic recovery: When the external pressure is relieved, the rubber O-ring will quickly return to its original shape and size, maintaining sealing performance.

in conclusion

Rubber O-ring seals are known for their simple yet efficient working principle under low pressure conditions. It is an important sealing element in various industrial applications, used to prevent leakage of liquids and gases while preventing the intrusion of impurities. Whether in hydraulic systems, fluid transmission pipelines, automotive engines or other low-pressure applications, rubber O-rings play a key role in ensuring the normal operation of equipment and systems.

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