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| Engineering mechanical seal technology application of four stages | For application in rubber seal of engineering machinery seal technology development process can be divided into four stages.
1 stage (1960-1970)
During the Chinese mechanical engineering products hydraulic system working pressure for 12-14MPa roughly. The sealing system by using seal: 0 form rubber sealing ring (NBR), A rotating seal cowhide shell, Corrugated steel skin ten cork ten spring metal seal face, Asbestos pan-gen, 10 rubber asbestos gasket, V sealing ring (cowhide ten phenolic ten bakelite), V sealing ring (10) : clip fabric NBR soft metal sealing gaskets, etc.
2 entrepreneurial stage (1971-1980),
During the production of Chinese mechanical engineering major products of hydraulic pressure system for 14-350 MPa roughly. Its sealing system USES in rubber seals, remaking eliminated cowhide, asbestos fibres and corrugated steel skin of sealing ten cork. Main type D: 0 seal ring (NBR, FKM), Caterpillar D chassis with duo-cone floating (metal ring dry 0 charts), D inner frame rotating seal FKM, ZACM BR, sichuan. Hydraulic and pneumatic reciprocating movement is 0 form seals D sealing ring (FKM), NBR, U-shaped secret D shoot circle (NBR, AU, BU) : V sealing ring (10); clamp fabric NBR Glass seal ring (NBR ten clip fabric), etc.
In this decade, such as engineering machinery, to adapt the metalforming machinery, etc, high-pressure hydraulic technology development needs, formed by the former ministry seven seals manufacturer specialized rubber. In addition, in order to promote the development of China's sealing technology, founded in 1975 and was established in 1979, "the hydraulic and pneumatic standardization technical committee of a hydraulic, pneumatic and" national standardization technical committee HuaFen standard rubber seal technology committee "(and old ISO/TCI3 / SC7 corresponding) and friction to fluid sealing points technical committee.
3 consolidate and develop the stage (1981-1990),
Main products of domestic engineering machinery hydraulic system working pressure reached 16-40MPa, its sealing system adopts the seals with rubber seal products form. Main types: o-shape sealing ring (NBR, FKM), Caterpillar chassis with duo-cone floating (o-shape figure 10 metal ring), Lubrication seal with seal components (caterpillar + AU) : NBR skeleton and the rotating oil born ten (NBR, FKM, ACM, EPDM), Combined sealing washer (NBR + metal), Hydraulic cylinder piston and piston fixed. Sealed with coaxial seal components (PTFE + NBR), Fixed hydraulic oil with backflow axis (NBR, FKM, ACM), And working pressure for 1? The voltage type rotating seal 3MPa FKM); (NBR, Double medium rotating seal (NBR, FKM), liquid o-ring pressure cylinders with double role in supporting ring seal components (reciprocating D dynamic NBR + PTFE + POM), etc.
4 the high-speed development stage (1991)
Engineering machinery and other high-pressure hydraulic industry and has introduced a lot of product manufacturing technology, promote foreign merchants into China market sealing seal. Foreign capital and technology, improve the Chinese seal into the overall level of industry.
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