(1) Analysis of steady-state hydrodynamic force and lateral force of each spool displacement return oil main spool according to the calculation results of flow field simulation, not only the internal static pressure distribution can be obtained, but also the force on the main spool can be obtained through the integration of its pressure distribution. The oil flow in the main valve chamber not only produces axial force (i.e. steady-state hydrodynamic force), but also has a certain lateral force in the radial direction. Now, the change curves of steady-state hydrodynamic force and lateral force valve opening of new and old valve cores are sorted as follows (10 discrete points are taken):
The change trend of core lateral force with valve core displacement is the same, indicating that the performance of the new valve has not changed; b) The figure shows the steady-state liquid in direction B
In the whole displacement process, it can be seen that the steady-state hydrodynamic force of the new valve core is basically less than that of the old valve, and the steady-state hydrodynamic force of the new valve core has the same trend with the displacement of the valve core, indicating that the performance of the new valve has not changed.
(2) Analysis of steady-state hydrodynamic force and lateral force of each spool displacement oil inlet main spool
The displacement of each spool of the directional valve is the steady-state hydrodynamic force and lateral force on the main spool of the oil inlet. Among them, a) the figure shows the force in Y direction. During the whole displacement process, it can be seen that the lateral force of the new valve core is less than that of the old valve, and when the valve core is left open, the direction of the lateral force of the valve core is opposite to that when the valve core is right open. The variation trend of the lateral force of the two valve cores with the displacement of the valve core is the same, indicating that the performance of the new valve has not changed; b) The figure shows the steady-state hydrodynamic force in direction B. during the whole displacement process, it can be seen that the steady-state hydrodynamic force of the new valve core is smaller than that of the old valve. When the valve core is left open, the steady-state hydrodynamic force direction of the new valve core is opposite to that of the right open valve core. Within the range of valve opening less than 3mm, the steady-state hydrodynamic force of the new valve is slightly larger than that of the old valve. The steady-state hydrodynamic force of the two valve cores changes the same trend with the displacement of the valve core, It indicates that the performance of the new valve has not changed.
