Oil seal is an essential precision component in mechanical equipment, mainly used to prevent liquid or gas leakage and block external impurities from entering. The following provides a detailed analysis from five aspects: definition, types, uses, industrial applications, and selection criteria:
Oil seal manufacturer procurement
1、 Definition and core functions
Oil seal is a dynamic sealing component designed specifically for rotating shafts, which achieves sealing through the combination of rubber elastomer and metal skeleton, and utilizes the radial pressure of lip springs. Its core functions are:
Leak prevention: prevent lubricating oil, cooling water, or chemical media from leaking from equipment gaps.
Intrusion prevention: Block dust, moisture, or corrosive substances from entering the interior of the machinery.
Adapt to dynamic working conditions: Maintain continuous sealing during shaft rotation or reciprocating motion.
2、 Main Categories and Characteristics
Oil seal components can be classified into various types based on their structure, material, and purpose:
3、 Core industrial application scenarios
Automobile industry
Engine crankshaft, camshaft oil seal
Transmission shift lever seal
Axle differential seal (to prevent gear oil leakage)
construction machinery
Sealing of excavator hydraulic cylinder
Dust resistant oil seal for rotary joint
High pressure pump shaft end seal
Chemical industry field
Fluorine rubber oil seal for corrosion-resistant pumps
Sealing of mixing shaft in reaction kettle
Pipeline valve sealing
New Energy and Precision Manufacturing
Sealing of semiconductor wafer processing equipment
Lithium battery injection port dustproof oil seal
Sealing of robot joint reducer
4、 Key points of selection
Media compatibility
Oil: Mineral oil and synthetic oil need to be matched with rubber material (such as nitrile rubber, which is not suitable for phosphate hydraulic oil).
Chemical medium: Strong acid/strong alkali should be coated with fluororubber or PTFE.
Operating condition parameters
Temperature: Choose silicone rubber for low temperature and fluororubber or PTFE for high temperature.
Pressure: Standard oil seals are used for normal pressure (≤ 0.05MPa), and special design is required for high pressure.
Speed: High speed shafts (≥ 15m/s) require VC type or power reflux type.
Environmental adaptability
Dusty environment: Choose a double lip oil seal with dust-proof lips.
Vibration impact: Metal skeleton oil seal enhances stability.
5、 Market development trend
Material upgrade: PTFE composite oil seals are gradually replacing traditional rubber, improving corrosion resistance and lifespan.
Precision machining: Nano scale mold technology improves the uniformity of lip contact.
Intelligent monitoring: Integrated sensors achieve real-time warning of sealing status (such as SKF intelligent oil seals).
If you need to further match specific working conditions or obtain manufacturer selection support, please provide the following information:
Equipment types (such as excavators, chemical pumps, robot joints);
Working medium (oil/water/chemicals);
Operating parameters (temperature, pressure, speed).
