There are many classifications of diesel fire pumps, it is based on different structural characteristics and classification.
Works are classified according to the number of impellers
1 or single-stage pump: that is, there is only one impeller on the pump shaft. 2 or multi-stage pump. : There are two or more diesel fire pumps on the pump shaft. At this time, the total head of the impeller pump impeller is the sum of n.
Two or two categories
1根据前期工作ssure or low pressure pump, the pressure is less than 100 meters of water column; 2 or medium pressure pump, the pressure is between 100 ~ 650 meters of water column; 3 or high pressure pump, the pressure is higher than 650 meters of water.
Third, the classification through the impeller entrance
1 or unilateral feed pump: also known as single suction pump, the impeller has only one inlet, 2 or bilateral feed pump: also known as double suction pump, both sides of the impeller inlet. Its flow rate is twice that of a single suction pump, which can be regarded as two impellers of single suction pump back to back together.
Four or press the pump casing seam form classification
1 or open the pump horizontally: that is, through the union of the horizontal surface of the shaft. 2 Pump or vertical joint surface: the combined line of surface and vertical axis.
Five or according to the position of the pump shaft
1 or horizontal pump: the pump shaft is in a horizontal position. 2 or vertical pump: the pump shaft is in a vertical position.
6. Classification according to the way of impeller water pressure chamber
1 or screw pump: Water comes out of the impeller and directly enters the pump spiral shape.
2 or guide vane pump: water comes out of the impeller, to the outer guide vane, and then enters the next level or flows to the outlet pipe. We usually say it is a multi-stage pump, which refers to the number of impellers.
According to other structural features, it may be a horizontal pump or vertical surface pump or guide vane pump, high pressure pump or single inlet pump, etc. According to different, the name is different. In addition, according to the use can also be classified, such as oil pump water pump, condensate pump or ash pump or circulating water pump, etc. ,,,, What should be paid attention to in the assembly of multistage centrifugal pump manufacturers?