黑山县绕阳河公社,地下静水位浅,由于来水不足,机井抽水时动水位下降较深,因而用离心泵抽水,如把水泵安在地面上,吸程大,出水量小;如采用落井安装,则每当汛期,地下水位上升,易被淹没。为了解决这个问题,他们试制成功了长轴无扬程泵(见右图),有的已连续运转300小时,效果良好。 Due to the insufficient water supply, the moving water level of the shaft drains down deeply. Therefore, centrifugal pumps are used to pump water. If the pump is placed on the ground, the suction stroke is large and the amount of water discharged is small. For example, Installation, then whenever the flood season, groundwater level rise, easily flooded. In order to solve this problem, they successfully produced a long-axis non-head pump (see photo to the right), some of which have been operating continuously for 300 hours and are working well.