The widely adopted Gerotor profile in the industry has a history of over a century. There have been few new rotor profiles introduced in the past century, and the few variations are simple modifications of the Gerotor profile. This is because the conjugate solution algorithm is complex, and the simplest circular arc as the base curve function algorithm has been used due to its simplicity. While the circular arc profile is easy to solve, its sealing and driving characteristics are often contradictory, and its space efficiency is low, posing a significant obstacle to further improving rotor pump performance.
The composite integral algorithm (Cotegral® Algorithm) developed by APT breaks through the barriers of traditional profile solutions, enabling the conjugate solution based on complex and segmented curves as base functions. Compared to rotor profiles generated with a traditional circular arc base, the new series of rotor profiles based on the Composite Integral Algorithm can be highly flexible in multi-parameter optimization. Depending on actual working conditions and technical requirements, customization of volume efficiency, drive angle, drive curvature, sealing range, sealing curvature, etc., can be done as needed. This allows rotor pumps to achieve better hydraulic performance, transmission performance, and reliability.
The rotor profile types developed by APT are illustrated in the above images, with various profile types maturely applied in the automotive and aviation industries. APT can also customize entirely new specialized profiles according to customer-specific requirements or specific technical needs.