Considering the convenient manufacturing processes and design algorithms, the involute tooth profile has been widely adopted in the industry. However, the evident drawbacks of the involute rotor profile include low space efficiency (smaller displacement for the same size) and limited effective sealing width, along with the issue of oil entrapment.
The Composite Integral Algorithm developed by APT breaks through the constraints of traditional profile solutions. It allows the use of more complex curves and segmented curves as base functions for solving rotor pair profiles. Compared to traditional involute rotor profiles, 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, optimization of volumetric efficiency, sealing performance, pressure pulsation, cavitation characteristics, etc., can be done on-demand. Moreover, it fundamentally eliminates the problem of oil entrapment, enabling the external meshing gear pump to achieve better hydraulic performance, transmission performance, and reliability.
The rotor profile types of the external meshing gear pump developed by APT are illustrated in the images above, with various profile types already maturely applied in the automotive and aviation industries. APT can also customize new specialized profiles according to customer-specific technical requirements.