Recently, the plastic fuel tank developed by the New Technology Materials Group and the Small Excavator Research Institute has been verified to meet all design requirements and successfully applied to the CLG9035E excavator.

The traditional fuel tank is made of metal, the process is complicated, the process is cumbersome, and the environment is polluted. Corrosion has been a thorny issue for a long time. Under the action of diesel oil with weak acidic corrosive medium, the inner surface of the fuel tank is easy to rust, the corroded products block the filter element, causing frequent engine flameout, and the user feedback is strong.

In 2015, the New Technology Materials Group teamed up with the Small Excavator Research Institute to develop a plastic fuel tank, and selected the CLG9035E excavator as the development model, strictly implementing the C-LDP R&D process for parts, from competitors' research and raw material selection analysis. Detailed and in-depth development of materials, material testing, supplier visits, process comparisons and embedded parts design. Plastic tank performance is thoroughly tested and evaluated through sealability, mechanical strength, low temperature shock, fire, high temperature, vibration acceleration and stress strain to ensure reliability and durability. After more than a year of hard work, the plastic fuel tank has been successfully applied to the CLG9035E excavator. All performance indicators have met the design requirements and passed two 600h reliability installation verification.

Compared with the metal fuel tank, the CLG9035E excavator plastic fuel tank will not damage the engine due to the corrosion-causing impurities causing the fuel supply system to enter the engine. At the same time, due to the good stability of high molecular weight polyethylene, the service life of plastic fuel tank can reach 10 years.

Second, plastic fuel tanks are usually formed in one piece, which can form shaped products with complex shapes. It is advantageous to form a suitable fuel tank shape according to the existing remaining space of the chassis, and to increase the volume of the fuel tank as much as possible, in the case where the overall arrangement of the frame has been determined.

Third, most plastic fuel tanks are made of high molecular weight polyethylene, saving 48% of the cost. The thermal conductivity of this material is very low, only 1% of the metal. At the same time, high molecular weight polyethylene has good elasticity and rigidity, and can maintain good mechanical properties at -40 ° C and 90 ° C, and can rebound by itself without impact. In the process of friction or impact, no electric spark will be generated and an explosion accident will occur. Even if the fire is accidentally caught, the plastic fuel tank will not explode due to thermal expansion. (This article is from Liugong)

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