Why are pneumatic cylinder pipes made of aluminum?

July 24, 2024

The cylinder tube is made of aluminum alloy, which has the characteristics of low specific gravity, corrosion resistance, fast thermal conductivity, and oil storage.

Most engine cylinder blocks are made of aluminum alloy. From a usage perspective, the advantages of cast aluminum cylinders are light weight, fuel savings, and weight reduction. In engines of the same displacement, using aluminum cylinder engines can reduce approximately 20kg. The weight of each vehicle can be reduced by 10%, and fuel consumption can be reduced by 6% to 8%. According to the latest data, the weight of foreign cars has decreased by 20% to 20% compared to the past. For example, Fox used a complete aluminum alloy material to improve engine cooling, increase engine efficiency, and extend lifespan while reducing vehicle weight. From the perspective of fuel efficiency, the advantages of cast aluminum engines in fuel saving have attracted too much attention.

However, the cost of material changes is higher. Due to differences in material prices and processing techniques, the price of using aluminum alloy cylinder engines will naturally be higher than that of cast iron engines. At this point, it is evident that cast iron engine cylinders dominate.

The cylinder is made of aluminum or aluminum alloy, and due to low-pressure pneumatic conveying, it is generally not higher than 0.8 MPa. The aluminum alloy cylinder is filled with pressure. The hydraulic transmission pressure can reach up to 32 MPa or even higher, and the strength of aluminum alloy material cannot be tolerated, so the main components of the hydraulic cylinder are made of steel.

Most small computers use aluminum alloy because the working pressure is not very high, and the heating and oxidation changes of aluminum are minimal, while large ship engines use other alloys.

Hydraulic and pneumatic cylinders have high pressure, and the oil is mostly conductive liquid, so there is basically no need to consider oxidation.

Aluminum cylinders (made of WEIYINGSI cylinder tubes) are lightweight and cost-effective, meeting the requirements for air tightness. Due to the permeability of oil molecules, hydraulic cylinders are less likely to leak from steel.

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