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Classification of common dynamic seals for rubber seals

Release time:

2019-04-25 12:30

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Classification of common dynamic seals for rubber seals
Rubber seals (Rubber seals) are a kind of general basic components in sealing devices, which play a very important role in the contradiction between leakage and sealing. -- It is a high elastic polymer compound. Divided into two kinds of rubber and synthetic rubber. Rubber is extracted from rubber trees, rubber grass and other plants after processing made of gum; synthetic rubber is made of various monomers by polymerization reaction. Rubber products are widely used in all aspects of industry or life.. Dynamic seal of rubber seal: dynamic seal rubber seal classification main seal parts of rubber seal> function and sealing material non-contact seal is also called gap seal (the general term of fluid dynamic mechanical seal and fluid static mechanical seal.)"
1. Clearance seal 2. Labyrinth seal 3. Damping gasket
1. Gap seal-Gap seal uses the tiny gap between moving parts to play a sealing role. It is a form of sealing. Its sealing effect depends on the size of the gap and the pressure difference, the length of the seal and the surface quality of the parts.
2. Labyrinth seal-Labyrinth seal is a series of annular sealing teeth arranged in sequence around the rotating shaft. A series of intercepting gaps and expansion cavities are formed between the teeth. The sealed medium will produce throttling when passing through the gaps of the labyrinth. Effect to achieve the purpose of leakage resistance.
3. Damping gasket-damping pad has a wide range of applications in automobile shock absorption technology. Damping and damping technology achieves the purpose of damping by attaching high damping materials to the surface of structural parts and dissipating structural parts. Contact seals (reciprocating seals such as the shafts of cylinders and cylinders in hydraulic systems, and the shafts are movable, and such seals are used in movable machinery. Also called rotary seal, self-sealing compression seal (it is a self-sealing compression seal that is automatically generated by the fitting surface and the sealing surface). The O-shaped rubber sealing ring is a low-friction filled polytetrafluoroethylene (PTFE) ring Combined with the O-shaped rubber sealing ring, the O-ring provides sufficient sealing preload and compensates for the wear of the PTFE ring. Coaxial sealing ring (Glaus ring, Sturt ring) 1. Glaus ring is composed of a rubber O-ring and PTFE ring. The O-ring applies the force, and the Grating ring is a double-acting piston seal. Low friction, no crawling, small starting force, high pressure resistance. 2. Sester ring is generally composed of a rubber O-ring and PTFE ring combination. The O-ring is the force element, which provides sufficient sealing force and compensates for the PTFE ring. Special-shaped sealing ring special-shaped cross-section rubber seal special shape rubber seal In general, in addition to circular and rectangular cross-sections, other shapes of cross-section rubber (or cloth) sealing ring are collectively referred to as special-shaped seal, such as cross-section Y-shaped, V-shaped, U-shaped, X-shaped, D-shaped, triangular, T-shaped sealing ring, etc. Metal hard seal, metal and non-metallic seal 1. Metal seals are made of high, high hardness sheet material refined, usually used in the mold or hardware adjustment and measurement, known as seals, sometimes also known as mold gasket or clearance. 2. Non-metallic materials are materials composed of non-metallic elements or compounds. Self-sealing self-tightening seal (also called lip seal) Y-shaped seal ring Y-shaped cross-section is Y-shaped, is a typical lip seal.
Widely used in reciprocating dynamic sealing device. The V-shaped sealing ring device is composed of three parts: support ring, sealing ring and pressure ring.
V-ring material to nitrile rubber and neoprene commonly used, rubber for water and air sealing, butyl rubber for non-combustible hydraulic oil and phosphate hydraulic oil.
The combined U-shaped sealing ring The combined U-shaped sealing ring is composed of two or more sealing elements. The U-rings have symmetrically arranged sealing lips for single-acting or double-acting standard hydraulic cylinders for piston rods or pistons. Star-shaped and composite lip sealing ring T star-shaped and composite lip sealing ring is a multifunctional sealing ring with multiple lips. star-shaped ring is a common sealing member in hydraulic cylinders. it is a typical lip sealing member, which can obtain good sealing effect no matter it is used for piston or piston rod. the supporting ring with supporting ring combined two-way sealing ring is also called guide ring, guide ring and support ring, it is a part used on the piston or piston rod of a hydraulic cylinder or cylinder to support the movement of the piston or piston rod. It can prevent the piston or piston rod from directly contacting and rubbing with the cylinder during the movement, and protect the cylinder. The role of not being damaged with the piston or piston rod.
The commonly used material of the guide ring is polyoxymethylene (POM). Including all kinds of seals or seals, gaskets, etc.
Piston ring (also called compression ring and oil ring) Metal piston ring (metal elastic ring) Metal piston ring (Piston Ring) is a piston ring made of cast iron and copper. It is used to embed the metal ring inside the piston groove. The piston ring is divided into Two types: compression ring and oil ring. The compression ring can be used to seal the combustible gas mixture in the combustion chamber; the oil ring is used to scrape off the excess oil on the cylinder.
Rotating shaft oil seal (commonly known as shaft oil seal belongs to the category of dynamic seal) oil seal (a kind of seal, with TC oil seal) oil seal is used to seal oil (oil is a common liquid substance in the transmission system, and also refers to the general The meaning of liquid substance), it isolates the parts that need to be lubricated in the transmission parts from the output parts, so as not to let the lubricating oil leak.
Hydraulic cylinder guide support ring element guide support ring (guide ring, guide sleeve, support ring, gear ring, etc.) guide support ring-is a kind of support piston or piston rod used on the piston or piston rod of hydraulic cylinder or cylinder The moving parts of the rod can prevent the piston or piston rod from direct contact and friction with the cylinder during the movement, and protect the cylinder and the piston or piston rod from being damaged.
The commonly used material of the guide ring is polyoxymethylene (POM). Hydraulic cylinder dust ring th = "124" dust ring (reciprocating seal) dust ring, the main function is to remove the reciprocating piston rod exposed on the outer surface of the cylinder attached to the dust, sand, rain and frost and other dirt, to prevent external dust, rain into the sealing mechanism. Including all kinds of seals or seals, gaskets, etc.

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