New sand washing machine work, the motor through the belt, reducer, gear reducer driven impeller slow rotation, sand and gravel into the wash tank to the trough in the impeller driven rolling and grinding each other, remove the cover the surface of sand and gravel impurities and destruction of the vapor layer of the coated sand, in order to facilitate dehydration; add water to form a strong water flow, timely impurities and a small proportion of foreign matter away from the bowl overflow export discharged to complete the cleaning effect. Clean sand from the leaves away, the final sand and gravel from the rotation of the impeller into the trough to complete the cleaning effect of the gravel.The inverter is a power converter in the motion control system. Today's motion control system includes a variety of disciplinary areas, the overall trend is: driven alternating current, the Raymond machine high frequency power converter, digital control, intelligence and networking. Therefore, the inverter transform components as system power, providing controlled, high-performance VVVF AC power has been the rapid development.