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The seals of high quality china oil seal design are widely used. Seals can be seen in everything from daily life to industrial machinery and equipment. Seals are mainly divided into static seals and dynamic seals. The static seal refers to the relatively fixed device chamber of the seal and its seal, while the dynamic seal is relatively movable. For example, the sealing part of a hydraulic cylinder is sealed within the cylinder wall. If it moves back and forth on the cylinder wall, it is a dynamic seal.
The difference between dynamic sealing and static sealing
Static sealing is divided into three categories: pads, glue sealing, and contact sealing.
Dynamic sealing can be divided into two categories: rotating dynamic seals and linear dynamic seals. The sealing method is divided into a relative stop -connected seal between the relatively stop connection and the relative motion to connect the dynamic seal.
Static seal: According to the pressure of the operation, the static seal can be divided into low -voltage static seals and high -pressure static seals. The low and medium -voltage static seal is often softer with raw materials, the pads with wide pads, and the high -voltage static seal is used with hard material and narrow touch width.
Dynamic seal: Whether the parts of the components that are relative to the relative movement can be divided into contact -type sealing and non -contact sealing.
Generally speaking, the sealing of contact -type seal is good, but due to conflict and wear constraints, it is suitable for lower sealing surface lines. In the contact seal, the touch orientation of the sealing part can be divided into round (radial) sealing and end surface sealing. The end -faced seal is also called mechanical seal.
Non -contact dynamic seals include maze sealed and power sealing. The former leaks is large, which is generally used in occasions where sealing and demand are not high. Power sealing has centrifugal sealing, floating ring sealing, spiral sealing, etc., which rely on the pressure difference between the power element to offset the pressure difference between the sealing sides to overcome the leak. pressure.
Non -contact sealing, because the cover is not directly touched, the starting power is small, and the life span is long. If the plan is reasonable, the leakage will not be too large. However, this type of seal is operated with the balance of fluid mechanics. If the working conditions change, it will lead to a large amount of leakage, and such seals cannot be purchased in the market.
