Views: 0 Author: Site Editor Publish Time: 2024-10-15 Origin: Site
When oil seals are classified by material, they can be divided into the following common types according to different working environments, media, temperatures and pressures:
Nitrile rubber oil seals are commonly used oil seal materials with good oil resistance, wear resistance and elasticity, and are suitable for general lubricating oils and mineral oil media. In the temperature range of -40°C to 120°C, NBR oil seals can maintain good sealing effects and are mainly used in medium temperature and pressure environments such as automobile engines, gearboxes, and hydraulic machinery.
Fluororubber oil seals have excellent high temperature resistance, oil resistance and chemical corrosion resistance. They are suitable for high temperature (-20°C to 200°C) and high pressure working conditions, and can resist corrosion from a variety of chemical substances. Therefore, it is often used in environments that require high temperature resistance or chemical corrosion resistance, such as automobile engines, heavy machinery, and chemical equipment.
Silicone rubber oil seal has good high and low temperature resistance (-60°C to 200°C) and strong anti-oxidation and ozone resistance, but its oil resistance is poor. Silicone rubber oil seals are usually used for static sealing occasions under more extreme temperature conditions, such as refrigeration equipment, food machinery and medical equipment.
Polyurethane oil seals have extremely high wear resistance and mechanical strength, good adaptability to mineral oil and grease, suitable for medium temperature and pressure environments (-30°C to 80°C), and are commonly used in hydraulic cylinders, excavators, lifting equipment and other applications that require wear resistance.
PTFE oil seal has excellent chemical corrosion resistance, high temperature resistance (-100°C to 250°C) and wear resistance, and is suitable for high temperature, high pressure, strong corrosion and high speed conditions. Therefore, it is widely used in sealing requirements under extreme conditions such as petrochemical, food and pharmaceutical equipment.
EPDM oil seal has good aging resistance, high temperature resistance (-50°C to 150°C) and ozone resistance, suitable for hot water, steam and alcohol environments, but not resistant to mineral oil and gasoline. It is mainly used in cooling systems, refrigeration equipment, hot water pipes, etc.
Oil seals of different materials are suitable for different use environments and media. The appropriate oil seal material should be selected according to the actual working conditions to ensure long-term and reliable operation of the equipment.
When oil seals are classified by structure, different types of oil seals have different structures, and each has different sealing characteristics and applicable occasions. The following are common oil seal types and their structural details:
• Structural details: Combined oil seals are composed of multiple sealing lips or sealing elements, usually including multiple rubber sealing bodies and supporting structures. The combined structure multi-layer lip and multiple sealing lip design can provide better sealing effect.
• Features and functions: Strong sealing effect, with multiple sealing properties of dustproof, waterproof and oilproof, high pressure resistance, suitable for diversified sealing needs.
• Applications: Commonly used in environments with high sealing requirements such as high-pressure hydraulic systems and heavy machinery.
• Structural details: The sealing lip of the lip oil seal is designed to be V-shaped, U-shaped or Y-shaped, and the sealing lip can fit the shaft surface more closely under pressure. The spring is tightened around the lip, which increases the contact pressure between the lip and the shaft.
• Features and functions: Suitable for high-pressure environments, can enhance the sealing effect, and is particularly suitable for sealing reciprocating parts.
• Applications: Widely used in reciprocating seals such as hydraulic cylinders and cylinders that need to withstand high pressure.
• Structural details: The open oil seal has an opening design on the oil seal ring, usually in a "C" shape, which can be flexibly separated and installed without disassembling the shaft. The sealing lip may have a spring to increase the sealing effect.
• Features and functions: The open structure is easy to install and disassemble, especially suitable for places where the shaft end is closed or difficult to replace.
• Applications: Suitable for shaft sealing of large industrial equipment, such as heavy equipment such as metallurgy and papermaking, especially for large shaft diameters and limited space.
• Structural details: High-pressure oil seals usually have multiple sealing lips and reinforced skeletons. The material is usually made of special rubber or polymer that is resistant to high pressure, and the structure can withstand high pressure. Some high-pressure oil seals will add anti-extrusion design to enhance high-pressure resistance.
• Features and functions: The structure is resistant to high pressure and impact, suitable for use under high-pressure conditions to prevent leakage of high-pressure liquid.
• Application occasions: Widely used in high-pressure hydraulic systems, hydraulic cylinders, and engineering machinery to seal liquids.
Oil seals of different structures are designed to meet different sealing requirements. They can be reasonably selected according to the actual use environment, temperature, pressure, shaft speed and other factors to achieve the best sealing effect of the equipment.
Jinwoseal was founded in 2013 and has been focusing on the research of seals for 11 years. Our products are sold to seven continents in the world, providing reliable sealing solutions for many customers. We produce oil seals, O-rings, and gaskets of various sizes, structures, and materials. From raw materials to final delivery, every step is strictly inspected by us. Every product is a promise, and we look forward to every cooperation with you.
