Optimization design of radial compensation structure of bidirectional involute internal gear pump

The force state of radial compensation structure of bidirectional involute internal gear pump is more complex because it is symmetrical distribution. In order to guide the development of bidirectional involute internal gear pump, the radial compensation structure of bidirectional involute pump was studied based on numerical calculation and CFD simulation. Based on the analysis of the working principle of the radial compensation crescent plate, the model was built, and the force of the crescent plate component during the operation of the internal gear pair was analyzed, and the calculation results were verified by Pumplinx simulation. The influence of the spring preload force and related structural parameters on the force state of the crescent plate assembly was explored and optimized. On the basis of small spring force, the compression coefficient of the crescent plate on the top surface of the internal gear pair was appropriately increased, which was beneficial to improve the compensation ability and reliability.