Slurry characteristics change according to the proportionality law and cutting theory

Several methods Slurry flow regulation Change change Slurry pipeline flow characteristic curves easiest way is to use the pump outlet valve opening to control , and its essence is to change the location of the pipeline characteristic curve to change the pump ‘s operating point.

Slurry characteristics change according to the proportionality law and cutting theory , changing the pump speed, change the pump structure ( such as cutting impeller diameter, method, etc. ) can change both methods centrifugal pump characteristic curve , so as to adjust the flow ( while changing the pressure head ) purposes.

Deviation from the operating point is Slurry efficient district governor of the basic conditions required . When Slurry speed changes, the valve opening remains unchanged ( usually maximum opening ) , piping system characteristics remain unchanged , while the water supply capacity and lift characteristics change.

Change the pump speed , the pump characteristic curve increased or decreased , so that the pump characteristics and device characteristics to change the location of the intersection , the pump also will change the flow rate , to achieve the purpose of flow control . From the figure can be analyzed , when changing the pump speed to regulate the flow down from Q1 to Q3 , the pump speed is decreased from n1 to n3, n3 speed of the pump characteristic curve H0 pipeline characteristic curve intersect at point A3 , point A3 to adjust the flow through the speed after the new operating point.

This method is fast, secure and reliable adjustment effect is obvious , slurry pump manufacturer no throttling losses , not only help to reduce the possibility of pump cavitation , but also through the right increases the speed / deceleration time is preset to extend the start / stop process that allows dynamic torque is greatly reduced , thus largely eliminating the devastating effects of water hammer , can extend the life of the pump energy savings , the disadvantage is the speed of the pump frequency equipment needed to change the speed of the prime mover , the principle of complex , investment is large , flow control valve regulating scope than smaller.