(1) Leakage Leakage is a phenomenon in which a small amount of fluid that does not perform useful work leaks out of the seal of a moving pair.
(2) Seals are used to prevent fluid or solid particles from leaking between adjacent bonding surfaces and foreign matter such as dust, silt, moisture, etc. intruded parts.
(3) static sealing surface static seal.
(4) The relative movement of the dynamic sealing seal.

(5) Extrusion seals produce a sealing effect by the contact pressure generated by the compression of the seal, such as O-ring seals.
(6) The lip seal has a flexible lip, which is sealed against the radial force exerted by the sealing edge to prevent leakage, also known as the "cup."
(7) Rotary Shaft lip seals are lip seals for rotary shaft seals, also known as "oil seals".
(8) Reciprocating lip seals are used for reciprocating parts such as lip seals in cylinders or cylinders.

(9) Hydrodynamic rotary shaft seal lip has a regular pattern on the back surface to change the contact state of the seal lip with the shaft. The lip seal returns the fluid leaking through the lip to the seal ring in the sealed chamber. .
(10) Seals are used for sheet seals between two stationary surfaces.
(11) Printed seals On a substrate, seals produced using a printing process.
(12) Coaxial seals Plastic rings and rubber rings together and all or most of the plastic ring as a combination of friction sealing surface seals.
(13) mechanical seal by at least a pair of end surfaces perpendicular to the axis of rotation in the fluid pressure and compensation mechanism elastic (or magnetic) and the role of auxiliary sealing and the auxiliary seal with the relative slip and constitute a device to prevent fluid leakage.

(14) Gap seals limit the leakage of seals by the effect of fluid resistance in the seal gap.
(15) The labyrinth seal restricts leaking seals by passing the fluid through tortuous gap channels and restricting flow resistance through multiple throttling.
(16) Ferrofluidic seals utilize a series of high-level (strength) magnetic fields generated by magnets and plates to concentrate the ferrofluid in an annular gap (or face gap) around the shaft in the enclosure to form a liquid ring seal for the seal. Fluid sealing device.
(17) The sealant is used for sealing between stationary joints. It is a liquid viscous material with fluidity before coating. It is easy to fill the gap between two joint surfaces, and has better sealing effect. Including liquid seal. Glue, anaerobic sealant, silicone sealant, etc.