Abstract: A simplified model of rocker arm intake head is established based on hydraulic equivalence, and a theoretical calculation model is established using the energy conservation equation. A correction factor is introduced in the theoretical model, which is further refined through experimental validation. Statistical analysis of the correction coefficient yields a standard deviation of 0.02, indicating that the modified calculation model $H=\left\{\bar{\varphi}\left(S_{\mathrm{EQ}}+S_{\mathrm{COD}}\right)+\frac{8}{g \pi^{2} d^{4}}\right\} Q_{z}^{2}$ meets the engineering design requirements.

Key words: siphon water decanter, rocker arm intake head, hydraulic calculation, mathematical model