Experimental Study on the Movement Properties of the Swing Arm for the PY1_(30) Impact Sprinkler
YU Fen-fen
YAN Hai-jun
WANG Fu-jun
Abstract：An experiment study on the swing arm forced by the jet flow from the nozzle of the PY_1 30 impact sprinkler was conducted by using the high speed photography technique.The movement properties of the swing arm was obtained and compared with the calculated results by the analytical equations.The results show that the positive rotation cycle increases with the inlet working pressure,while the reverse rotation cycle and the restricted motion time during both positive and reverse rotations decrease with the increasing inlet pressure.The free motion time is much larger than the restricted motion time in positive rotation,while the restricted motion time accounts for about 25% of the reverse rotation cycle.The ration angle fits a sinusoidal curve shape in free motion process of the position rotation.But the angular velocity changes in an unpredictable way in the restricted motion process of both positive and reverse rotations.Both the rotation angles and angular velocities of experiment and calculation are in the same order of magnitude,while the experimental one is larger than the calculated results.
Keywords：impact sprinklerhigh speed photography techniqueswing arm movementjet flow
Publication Date：2009-01-01
Online Publishing Date：2026-09-12(First online date of this platform, not the publication date of the document)
Pages：4( 68-71 )