Performance of four-column hydraulic double-acting vane pump
1. Stator transition curve. Since the curve of the inner surface of the four-column hydraulic press consists of four arcs and four transition curves, the dynamic characteristics of the pump are largely affected by the transition curves. The ideal transition curve should not only make the radial velocity change uniform when the blade slides in the groove, but also make the acceleration change at the transition curve and the arc segment node of the blade not abruptly changed, so as to reduce the impact and noise, and at the same time. The pulsation of the instantaneous flow of the pump should be minimized.
2. Blade placement angle. In order to ensure that the four-column hydraulic press vane slides out of the vane groove smoothly and reduce the pressure angle of the vane, according to the dynamic characteristics of the transition curve, the vane groove of the double-acting vane pump is usually processed to be inclined forward along the rotation direction by a placement angle. When the vane has a placement angle, the vane pump is not allowed to reverse.
3. Automatic compensation of end face clearance. In order to increase the pressure reduction, the outer side of the distribution plate is connected with the oil discharge chamber, so that the distribution plate of the four-column hydraulic press will be closer to the rotor when the hydraulic pressure distribution plate is pushed.
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