1. Product Overview

NBR skeleton oil seal is a seal that combines the elasticity of nitrile rubber (NBR) with the strength and support of a metal skeleton. It is widely used in high-pressure, high-temperature, and highly corrosive environments such as hydraulic systems, automobile engines, mechanical equipment, and petrochemicals to prevent liquid leakage or prevent external contaminants from entering the equipment system. Its structural design can ensure stable sealing effects in harsh environments.

2. Working Principle

Sealing effect: NBR skeleton oil seal consists of rubber sealing lips, metal skeletons, and springs. The sealing lips form a close contact with the shaft or housing surface to prevent oil and gas leakage and maintain the sealing of the system. The spring continuously applies pressure to ensure that the sealing lips will not leak due to loss of elasticity under high pressure conditions.

Metal skeleton: The design of the metal skeleton enhances the mechanical strength of the oil seal and can effectively support work under high pressure and high load environments. It ensures that the oil seal does not deform under dynamic working conditions, thereby extending its service life.

3. Application areas

Hydraulic equipment: In hydraulic systems such as hydraulic pumps, hydraulic motors, and hydraulic cylinders, it is used to prevent liquid leakage and maintain sealing performance, and adapt to various high-pressure environments.

Automotive industry: used for sealing engines, gearboxes, wheels, etc. to prevent oil leakage and maintain the lubrication effect of the equipment.

Industrial machinery: used for oil seals in mechanical equipment to prevent the leakage of lubricating oil and coolant, and protect the inside of the equipment from contamination.

Petrochemical: used in oil drilling equipment, chemical reactors, pipeline seals and other equipment to prevent the leakage of fluids such as oil and natural gas, and ensure the safety and stable operation of the system.

4. Material selection

Sealing material: NBR (nitrile rubber) has excellent oil resistance and wear resistance, and is suitable for working environments in contact with oil and other petroleum-based liquids. According to different needs, the hardness and formula of NBR can be customized to adapt to different working conditions.

Metal skeleton material: corrosion-resistant materials such as stainless steel and carbon steel are usually used as skeleton materials to ensure that its structure is stable and can continue to work under high pressure and high temperature.

Spring material: The spring is usually made of stainless steel or carbon steel to ensure that the sealing lip provides stable pressure during use.

5. Size and Customization

Standard size: The size of NBR skeleton oil seals ranges from a few millimeters to hundreds of millimeters. Common oil seal diameters include 20mm, 40mm, 60mm, 80mm, etc. Different outer diameters, inner diameters and thicknesses are provided according to equipment requirements.

Customization options: Customization services can be provided according to customer requirements, including different hardness, sealing lip shapes, metal skeleton structures, spring designs, etc. to meet special application requirements.

6. Installation and maintenance

Installation: When installing NBR skeleton oil seals, it is necessary to ensure that the contact surface is smooth and clean to avoid dust and impurities affecting the sealing effect. The correct installation method can extend the service life of the oil seal and maintain the sealing performance.

Maintenance: Check the sealing status of the oil seal regularly to ensure that there is no leakage. If the oil seal is aged, worn or deformed, it should be replaced in time to avoid affecting the normal operation of the equipment.

7. Advantages

Strong oil resistance: It can provide efficient sealing in petroleum-based liquid environments such as oils, lubricants, diesel, etc.

High pressure and high temperature adaptability: It has good high pressure and high temperature resistance, and is suitable for high pressure and high temperature environments such as hydraulic systems and engines.

Wear resistance: Maintains a long service life in high friction and wear environments.

High structural strength: The metal skeleton enhances the mechanical strength of the oil seal and ensures the stability of the oil seal in a high-pressure environment.

8. Disadvantages

Poor low temperature resistance: NBR oil seals have poor elasticity in low temperature environments and are prone to becoming brittle, making them unsuitable for use in low temperature environments.

Not UV-resistant: Long-term exposure to UV rays may cause NBR oil seals to age, so long-term exposure to sunlight should be avoided.