Oil seals in hydraulic systems for construction machinery are used to prevent leaks of hydraulic fluid from the system. They are also used to prevent the ingress of dirt and other contaminants into the system.

There are a variety of different types of oil seals available, each with its own unique properties. The type of oil seal used in a particular application depends on a number of factors, including the operating pressure, temperature, speed, and fluid type.

Some of the most common types of oil seals used in hydraulic systems for construction machinery include:

• Radial lip seals: Radial lip seals are the most common type of oil seal. They have a single lip that seals against the rotating shaft. Radial lip seals are suitable for a wide range of applications and are relatively inexpensive.
• Double lip seals: Double lip seals have two lips that seal against the rotating shaft. They provide a higher level of sealing performance than radial lip seals but are also more expensive.
• Cartridge seals: Cartridge seals are self-contained units that contain all of the necessary components, including the seal, spring, and housing. Cartridge seals are easy to install and maintain, and they provide a high level of sealing performance.
• Mechanical face seals: Mechanical face seals are used in high-performance applications where a high level of sealing is required. They have two flat faces that are sealed together by a spring. Mechanical face seals are more complex and expensive than other types of oil seals, but they provide the highest level of sealing performance.

Oil seals are an essential component of hydraulic systems in construction machinery. By selecting the right type of oil seal for the application, and by following proper maintenance procedures, oil seals can help to extend the life of hydraulic components and reduce the risk of downtime.

Here are some additional technical details about oil seals in hydraulic systems for construction machinery:

• Materials: Oil seals are typically made of a soft and durable material, such as nitrile rubber or polyurethane. These materials are resistant to wear and tear, and they can withstand a wide range of operating conditions.
• Operating pressure: Oil seals are available for a wide range of operating pressures. The type of oil seal selected must be able to withstand the operating pressure of the hydraulic system.
• Operating temperature: Oil seals are also available for a wide range of operating temperatures. The type of oil seal selected must be able to withstand the operating temperature of the hydraulic system.
• Speed: Oil seals are also available for a wide range of speeds. The type of oil seal selected must be able to withstand the rotational speed of the shaft.
• Fluid type: Oil seals are also available for a variety of different fluid types. The type of oil seal selected must be compatible with the fluid used in the hydraulic system.

TCN and TB oil seals are both types of radial shaft seals used in hydraulic systems. They are designed to seal rotating shafts and prevent the leakage of hydraulic fluid.

TCN oil seals are pressure-resistant oil seals with an auxiliary cage to minimize lip deformation under pressure. They are typically used in high-pressure applications, such as hydraulic pumps and motors. TCN oil seals are made of a variety of materials, including nitrile rubber, Viton, and PTFE.

TB oil seals are low-pressure dual lip radial shaft seals with a garter spring to provide protection from contaminants. They are typically used in lower-pressure applications, such as hydraulic cylinders and actuators. TB oil seals are made of a variety of materials, including nitrile rubber, Viton, and polyurethane.

Comparison of TCN and TB oil seals

Selection of TCN and TB oil seals