During the use of prefabricated rubber track membrane, the aging phenomenon is mainly caused by the combined effects of thermal oxidative aging, ozone aging, light aging and mechanical fatigue aging. Thermal oxidative aging is the oxidative cracking of rubber molecular chains under high temperature and oxygen environment, which causes the rubber to become hard and brittle; ozone reacts with unsaturated double bonds in rubber to form cracks; ultraviolet radiation causes light aging and destroys the molecular structure of rubber; and the repeated stress that the track bears during operation will accelerate the process of mechanical fatigue aging. Understanding these aging mechanisms is the basis for targeted improvement of anti-aging performance.
Optimizing material formulation is the key to improving the anti-aging performance of prefabricated rubber track membrane. In the selection of rubber matrix, rubber types with excellent aging resistance such as chloroprene rubber and EPDM rubber are preferred. Compared with natural rubber, they have stronger resistance to heat, oxygen and ozone. At the same time, adding high-efficiency antioxidants and anti-aging agents, such as hindered phenol antioxidants, can effectively capture free radicals and delay oxidation reactions; amine antioxidants can inhibit ozone cracking. In addition, nanomaterials such as nano silicon dioxide and nano zinc oxide are introduced to form a physical barrier by utilizing their small size effect and surface activity, which enhances the ability to block ultraviolet rays and further improves the anti-aging performance.
The production process directly affects the anti-aging performance of prefabricated rubber track membrane. In the mixing process, the mixing temperature and time are strictly controlled to ensure that the anti-aging additives are fully and evenly dispersed to avoid affecting the protective effect due to uneven local concentration. In terms of vulcanization process, the low-temperature long-time vulcanization method is used instead of the traditional high-temperature short-time vulcanization method to reduce the thermal degradation of the rubber molecular chain, reduce the internal stress, and improve the heat resistance of the product. In addition, the surface of the track membrane is post-treated, such as applying an anti-aging coating, which can form a protective film on the surface of the track, isolate oxygen, ozone and ultraviolet rays, and effectively delay the aging process.
Reasonable structural design helps to improve the anti-aging ability of prefabricated rubber track membrane. By optimizing the thickness distribution of the track, the thickness is increased in the parts that are prone to wear and high stress, and the mechanical fatigue aging caused by excessive deformation is reduced. Design a reasonable heat dissipation structure, such as setting a heat dissipation channel inside the track to accelerate heat dissipation and reduce the speed of thermal oxygen aging caused by high temperature. At the same time, a special transition structure design is adopted at the contact point between the track and the drive wheel and the supporting wheel to reduce stress concentration, reduce the risk of local aging, and achieve the coordinated optimization of structural design and anti-aging performance.
Taking anti-aging measures in actual use and maintenance can effectively extend the life of prefabricated rubber track membrane. Avoid long-term operation of the track in high temperature, high humidity or strong ultraviolet environment. If it cannot be avoided, a sunshade can be built and cooling measures can be taken. Clean the track regularly to remove pollutants such as mud, oil and other pollutants attached to the surface, which may accelerate the aging of rubber. In addition, control the running load of the track, avoid overloading, reduce mechanical fatigue aging caused by excessive stress, and slow down the aging speed of the track membrane through standardized use and maintenance.
The introduction of intelligent monitoring and aging warning system can grasp the aging status of prefabricated rubber track membrane in real time. Sensors are embedded inside the track to monitor parameters such as temperature, stress, strain, etc., and the data is transmitted to the background system through the Internet of Things technology. Using big data analysis and machine learning algorithms, the aging trend of the track is predicted. When the aging index is close to the critical value, an early warning is issued in time to remind the user to take replacement or maintenance measures to avoid sudden failures caused by aging, achieve preventive maintenance, and extend the service life of the track membrane.
To ensure the effectiveness of the anti-aging performance improvement strategy, a complete testing and verification system needs to be established. Laboratory accelerated aging tests are used to simulate aging environments such as thermal oxygen, ozone, and light, and the improved prefabricated rubber track membrane is tested for performance. The changes in mechanical performance indicators such as tensile strength and elongation at break before and after aging are compared. At the same time, long-term performance tests under actual working conditions are carried out, and the products are put into the construction machinery operation site to track and record their aging in the real environment. According to the test results, the improvement strategy is adjusted and optimized to ensure the realization of the goals of improving anti-aging performance and extending life.
