The compression of the O-rings
The compression of the O-rings is generally determined by the hardness and material of the O-rings. If the hardness of the O-rings is 70 degrees, then the compression of the O-rings is equal to 20%. Of course, the lower the hardness of the O-rings, O-rings compression is greater, mainly for low-pressure places. Then the higher the O-rings hardness, O-rings compression is smaller, mainly for high pressure, pressure, resistance to the use of small environment. And so on, you can get what you need any hardness O-rings compression.
O-rings material is different and O-rings compression changes, the general materials such as NBR nitrile rubber, NR natural rubber, CR chloroprene rubber, EPDM EPDM rubber, HNBR hydrogenated nitrile rubber, SILICOME silicone, SBR Styrene butadiene rubber, Buna Dinar rubber, acrylic rubber ACM, O-rings compression or 20% to calculate. If it is a special material FKM, VITON, fluorine rubber, PU, FLS silicone rubber, polyurethane, the O-rings of these materials compression is calculated in 15%.
The above is our O-rings compression test value, so that you businesses, engineers, friends reference, accurate or to your actual assembly of the product to determine the results. For more information, please call us.
O-rings rotation seal resistance formula: Newton N = hardness value * cross-sectional area * 1/16 * rubber Mooney viscosity. O-rings rotation seal resistance and hardness, area, rubber Mooney viscosity is directly related.
National Rubber O-rings quality supervision and inspection center can also be measured you need O-rings rotation seal resistance, can now officially undertake O-rings rolling resistance test, the machine is the first development of the first O-rings rolling Resistance testing machine, but also the domestic third-party dedicated rolling resistance testing machine. The machine adopts the steady-state dynamometer method, draws on the advanced experience of foreign equipment and carries on the technical innovation, the frame adopts the integral structure, the mechanical positioning precision is very high, the key components are imported from abroad to ensure the precision of the testing machine can meet the relevant standard Claim. Repetitive test results show that the standard deviation of the test can meet the ISO / CD28580 standard for the car and O-rings standard deviation requirements. National Rubber Tire Quality Supervision and Inspection Center rolling resistance testing machine to complete the acceptance work.
O-rings is an axial effect of the elastic rubber seal, for the shaft without pressure seal. Seal lip has a better activity and adaptability, can compensate for greater tolerance and angular deviation, to prevent the internal grease or oil leakage, but also to prevent the outside of the splashing or dust intrusion. O-rings can be used as a seal for host products and can also be used for retrofit and repair applications.
O-rings are mainly used for static and reciprocating seals. For rotary motion seals, only for low speed rotary seals. O-rings is generally installed in the outer or inner circle on the rectangular cross-section of the seal from the role.
O-rings in the oil, acid, grinding, chemical erosion and other environments still play a good seal, shock absorption in the machine tools, ships, automobiles, aerospace equipment, metallurgical machinery, chemical machinery, engineering machinery, construction machinery, Petroleum machinery, plastic machinery, agricultural machinery, and various types of instruments, a large number of applications of various types of sealing components.
O-rings is widely used in reciprocating seal device, its service life is higher than the O-rings. O-rings for the working pressure is not greater than 40MPa, the working temperature of -30 ~ 80 ℃.
The Compression Of The O-rings
- Aug 11, 2017-
The compression of the O-rings