Automobile power steering pump NBR FKM seals

Automobile power steering pump NBR FKM seals

The automobile power steering pump is an important component that provides hydraulic power to the steering system, and the rubber sealing ring plays a key sealing role in the power steering pump. In this article, I will introduce in detail the functions, characteristics and common seal types of the automotive power steering pump rubber seal.

1. Function of rubber sealing ring
The rubber sealing ring of the power steering pump mainly has the following functions

Sealing function: The rubber sealing ring can effectively prevent hydraulic oil from leaking from the pump body and shaft of the steering pump, ensuring the sealing performance of the hydraulic system.
Blocking function: The sealing ring can block the gap between the pump body and the shaft to prevent leakage and loss of hydraulic oil during work.
Prevent impurities from entering: The rubber sealing ring can also effectively prevent external impurities such as dust, moisture, etc. from entering the power steering pump, keeping the system clean and working normally.

2. Characteristics of rubber sealing rings

Oil resistance: Rubber seals need to have good oil resistance to cope with the erosion and corrosion of hydraulic oil used in hydraulic systems.
Elasticity and resilience: The sealing ring needs to have a certain degree of elasticity and resilience to ensure that it can maintain a tight seal during the rotation of the pump body and shaft.
Wear resistance: Due to friction and high pressure when the power steering pump works, the sealing ring needs to have high wear resistance to ensure long-term reliability.
Adapt to a wide temperature range: The sealing ring needs to adapt to a wide temperature range, including high and low temperature environments, to ensure normal operation under various working conditions.

3. Common sealing ring types:
In automobile power steering pumps, common types of rubber seals include

• O-ring: O-ring is one of the most common types of sealing rings. It has an annular cross-section and is widely used for static sealing and dynamic sealing.
• V-ring: V-ring is a sealing ring with a V-shaped cross-section. It is usually used for sealing rotating shafts and can prevent liquid and impurities from entering the shaft area.
• U-ring: U-ring is a sealing ring with a U-shaped cross-section. It is often used for dynamic sealing and can effectively prevent liquid leakage.
• X-ring: X-ring is a sealing ring with an X-shaped cross-section. Compared with O-rings, it has better sealing performance and anti-rotation characteristics.

These sealing rings are usually made of rubber materials, such as nitrile rubber (NBR), fluorine rubber (FKM), etc. Different materials and sealing ring types are suitable for different working conditions and requirements. Therefore, when selecting and replacing sealing rings, you need to make a reasonable selection based on the specific power steering pump model and application requirements.

In the automobile power steering pump, when selecting the material of the rubber sealing ring, the following factors need to be considered

• Oil resistance: Since the power steering pump uses hydraulic oil as the working medium, the sealing ring needs to have good oil resistance to prevent the hydraulic oil from eroding and corroding the sealing ring. Commonly used rubber materials with good oil resistance include nitrile rubber (NBR) and fluorine rubber (FKM).
• Wear resistance: There is friction and high pressure when the power steering pump works, and the sealing ring needs to have high wear resistance to ensure long-term reliability. Materials such as nitrile rubber (NBR) and fluoroelastomer (FKM) generally have better wear resistance.
• Temperature range: Seals need to adapt to a wide range of temperatures, including high and low temperature environments. Fluorine rubber (FKM) materials generally have better high temperature resistance, while nitrile butadiene rubber (NBR) is suitable for general temperature ranges.

Based on the above considerations, nitrile rubber (NBR) and fluoroelastomer (FKM) are commonly used materials for automotive power steering pump seals. Nitrile rubber (NBR) has good oil resistance and wear resistance, and is suitable for power steering pumps under general working conditions. Fluorine rubber (FKM) has excellent oil resistance, high temperature resistance and wear resistance, and is suitable for power steering pumps in high-demand and high-temperature environments.

NBR car power steering pump rubber seal

NBR (nitrile butadiene rubber) is a commonly used rubber material, often used in rubber seals for automobile power steering pumps. The following are the characteristics and advantages of NBR rubber seals in automobile power steering pumps

Oil resistance: NBR rubber has good oil resistance and can resist the erosion and corrosion of hydraulic oil, ensuring the reliability of the sealing ring in the hydraulic system.

Wear resistance: NBR rubber has good wear resistance and can be used for a long time under the high pressure and friction environment of the power steering pump, reducing leakage and loss.

Elasticity and resilience: NBR rubber sealing rings have good elasticity and resilience and can maintain a tight sealing state during the rotation of the pump body and shaft.

Adaptable to a wide temperature range: NBR rubber sealing rings adapt to a wide temperature range, including conventional operating temperature ranges, and are suitable for power steering pumps in a variety of climate and environmental conditions.

High cost-effectiveness: NBR rubber is a relatively affordable sealing ring material with low production costs and is suitable for mass production and wide application.

It should be noted that despite the advantages of NBR rubber, other material options may need to be considered in certain special operating conditions, such as high-temperature and high-pressure environments, or applications requiring higher oil and chemical resistance. Such as fluorine rubber (FKM), etc.

Automobile power steering pump rubber seal FKM

FKM (fluoroelastomer) is a material commonly used in the rubber sealing rings of automotive power steering pumps. The following are the characteristics and advantages of FKM rubber seals in automobile power steering pumps

• Oil resistance: FKM rubber has excellent oil resistance and can resist the erosion and corrosion of hydraulic oil in the hydraulic system for a long time, maintaining the reliability of the sealing ring.
• High temperature resistance: FKM rubber has excellent high temperature resistance and can maintain stable performance under high temperature conditions. It is suitable for power steering pump applications in high temperature environments.
• Wear resistance: FKM rubber sealing ring has good wear resistance and can be used for a long time under the high pressure and friction environment of the power steering pump, reducing leakage and loss.
• Chemical stability: FKM rubber has good resistance to a variety of chemicals and can resist the erosion of some acids, alkalis and solvents, ensuring the reliability of the sealing ring in harsh environments.
• Sealing performance: FKM rubber sealing ring has good elasticity and resilience, and can maintain a tight sealing state during the rotation of the pump body and shaft to prevent hydraulic oil leakage.