Dynamic seal and static seal concept

Dynamic seal and static seal are two important concepts in sealing technology, they are different in definition, application scenarios and characteristics.

Dynamic seal, also known as motion seal, it refers to the relative motion between the sealed components in the working state. This relative motion can be reciprocating or rotating. The main purpose of dynamic sealing is to prevent media (such as gas, liquid, etc.) from leaking between components in relative motion. In order to achieve dynamic sealing, sealing filler is usually used as the main sealing means. The role of the sealing filler is to form a barrier between the components to prevent the leakage of the medium.

Static seal, also known as fixed seal, it refers to the case that there is no relative movement between the sealed components. The main purpose of static sealing is to prevent media leakage between stationary components. Usually, static sealing is achieved by sealing gaskets. The sealing gasket is placed between two components that need to be sealed, and a tight fit between the gasket and the component is formed by pressing or bolting, etc., so as to achieve the sealing effect.

In practical applications, the choice of dynamic seal and static seal depends on the specific working environment and requirements. For example, on a rotating shaft that needs to prevent media leakage, a dynamic seal is usually selected; Where two static interfaces need to be sealed, such as pipe joints, static sealing is usually chosen. In addition, the choice of sealing materials is also very important, need to be considered according to the nature of the medium, temperature, pressure and other factors.

In general, dynamic sealing and static sealing are two important concepts in sealing technology, and they are different in definition, application scenarios and characteristics. In practical applications, appropriate sealing methods and materials need to be selected according to the specific working environment and requirements.