Oil seals are generally made from nitrile rubber, fluorine rubbers, silicone rubber, acrylic rubber, polyurethane, PTFE and other materials. So choose to use oil seals to consider the characteristics of the working medium, so the oil seals are generally used in the engine before and after the crankshaft and camshaft or the transmission of the front and back and the oil seal rod.
Because of the simple structure of oil seals, it is easy to manufacture, it also has light weight, less supplies, use and testing are very convenient, the price is also very cheap, good sealing performance, long service life and so on.
Oil seal IT and mechanical seals are not the same, Oil Seals because the production of oil seal materials, so the working medium of oil seal temperature can not exceed 50 degrees, and in the use of oil seals installed in the mechanical equipment, must check its tightness and installation to meet technical requirements.
Oil seals are used to seal the mechanical equipment in the rotary shaft seal oil seals, and the cavity is basically static, so the oil seal is also known as rotary shaft lip-shaped sealing ring.
Mechanical friction is partly due to the oil entry in the mechanical operation, to prevent the oil from leaking from the mechanical gap and to use oil seals, Oil Seals and in addition to oil also need to prevent water and chemical solution leakage and dust and sand from the external intrusion, at this time also need to use oil seal seal State, one is the outer edge of the oil seal and the cavity between the static seal, while ensuring the edge of the oil seal in the cavity between the reliable positioning. The second is seal seal between sealing lip and shaft of oil seal, Oil Seals when the axle is rotated, it is sealed dynamically when the shaft is stationary. The comprehensive effect and interaction of various influencing factors have a great influence on seal performance and service life of oil seals.
The main use of oil seals for engine crankshaft and camshaft sealing cars, sealed forklifts for motor vehicles such as gear boxes, hubs, axle shafts, differential gears, Oil Seals excavators and other mechanical transmission systems, seals for industrial use of agricultural machinery and construction machinery; seals of hydraulic components (pumps, motors), sealed, daily-used machinery, for use in mechanical engineering and equipment processing industries
Main characteristics of oil seals
The outer part of the oil seal is used to guarantee the static sealing of the cavity-the outer edge of the inner cladding metal skeleton, and the outer edge of the exposed metal skeleton, most of which need to be polished and coated with anticorrosive coating. Oil Seals The sealing lip with spring ensures the dynamic and static sealing reliability of the shaft. After a long period of development and research results, seal lip structure of oil seal is improved to excellent performance, which can increase the sealing reliability in a wider load range to add dust-proof lip, Oil Seals or a plurality of dust-proof lip used in special cases to prevent external contamination and dust intrusion.
Oil seals are mainly composed of sealing body, reinforcing skeleton and self tightening helical spring. The sealing body is divided into the bottom, waist, edge and seal lip according to different parts.
Characteristics of oil Seals
1, oil seal structure simple, easy to manufacture. Simple oil seal can be molded once, even the most complex oil seals, manufacturing process is not complicated. Metal skeleton oil seals also only through stamping, bonding, inlay, molding and other processes can be metal and rubber composition of the required oil seal.
2, oil seal weight light, less supplies. Each type of oil seal is a combination of thin-walled metal and rubber parts, and its material consumption is very low, Oil Seals so the weight of each oil seal is very light.
3, the installation position of oil seal is small, the axial size is small, easy to process, and make the machine compact.
4, the seal of oil seal function is good, the service life is long. It has a certain adaptability to the vibration of the machine and the eccentricity of the spindle.
5, easy to remove oil seals, inspection and profits.
6. The price of oil seal is cheap.