Plastic gears molded from Vestakeep polyetheretherketone (PEEK) produced by Evonik are used for the first time in automotive transmissions. To replace metal gears, Evonik has developed a PEEK molding compound whose tribological properties and durability can withstand the harsh environment of internal combustion engines.
Mass balancers ensure smooth operation of internal combustion engines by reducing vibrations caused by pistons to surrounding structures. The gears of the mass balancer are in contact with the engine oil and, therefore, are exposed to temperatures of up to 130°C. So far, only metal gears have been used in this environment.
With Vestakeep PEEK 5000 G, Evonik offers a high-resistance and high-performance material to replace these metal gears. In addition to the required shock absorption, plastic gears have a high mechanical and tribological stress resistance. They have lower friction losses and are noticeably quieter than traditional metal gears. In addition, the lower mass moment of inertia saves energy. Finally, gears made of Vestake PEEK are manufactured by injection molding, which is inexpensive and eliminates the extensive rework required when using metal.
By using its own gear test platform, Evonik supports development activities in close coordination with customers. "We can generate specific material data for optimal design of gears made of high-performance plastics," said the person. "We can perform tests at temperatures ranging from -20°C to 260°C, including in dry and lubricated conditions. Down."
The use of high-performance plastics under the difficult conditions of mass-balanced transport is believed to be another step in the material's success. "We have demonstrated the extraordinary performance of Vestakeep here. These are also suitable for other challenging applications and we are the right development partner for new projects. Our customers are well supported, from material selection and computer-aided simulations, to our The technical implementation of the application technology team.”