Mixed flow pumps are pumps whose flow rate and head are between those of centrifugal pumps and axial flow pumps; they are larger than centrifugal pumps but smaller than axial flow pumps. The head is lower than that of centrifugal pumps but higher than that of axial flow pumps; mixed flow pumps have high efficiency and a wide efficiency range; when the flow rate changes, the shaft power does not change much, and the prime mover can always operate at full load; they have good cavitation resistance, stable operation, and a wide operating range; they can operate continuously when the required flow rate is small; small and medium-sized horizontal mixed flow pumps have a simple structure, light weight, and are easy to use and maintain. They combine the advantages of centrifugal pumps and axial flow pumps, making them a good pump type.

　　Mixed flow pumps can be divided into horizontal pumps and vertical pumps according to the different pressure chambers. Vertical mixed flow pumps are used for large pumps. The structure of a horizontal volute mixed flow pump is similar to that of a single-stage single-suction centrifugal pump, except for the shape of the impeller. The outlet edges of the mixed flow pump blades are inclined, the number of blades is small, and the flow passage is wide. Generally, the flow rate of a mixed flow pump is larger than that of a centrifugal pump, and the volute casing is also larger. For stable support.

　　The base of the mixed flow pump is generally located below the pump body, and the bearing body is supported by the pump body. In addition, the sealing method of the horizontal volute mixed flow pump often uses a plane seal (also known as an axial seal), that is, the axial end face on the impeller is sealed with the corresponding sealing surface on the pump cover. During assembly, place paper between the volute casing and the pump cover or bearing body. When the axial clearance increases, the paper gasket can be removed or a copper gasket can be added to the hub end face of the impeller rear cover plate to reduce the clearance.

　　Guided vane mixed flow pumps come in vertical and horizontal types, and their structure is very similar to that of mixed flow pumps. The structure of the vertical guided vane mixed flow pump can also be divided into fixed type, semi-adjustable type, and fully adjustable type according to the blade angle adjustment method. Compared with volute mixed flow pumps, they have smaller radial dimensions but slightly worse hydraulic performance. The pump body of the horizontal guided vane mixed flow pump opens horizontally, making installation and maintenance convenient.

　　A mixed flow pump is a pump that is between a centrifugal pump and an axial flow pump. In terms of its working principle, it works by the dual action of the axial thrust and centrifugal force generated by the rotating impeller on the liquid. The liquid flows into the impeller axially and flows out of the impeller in an oblique flow, so the mixed flow pump is also called an oblique flow pump.

　　Why is the mixed flow pump not rotating during operation?

　　A mixed flow pump is a pump that uses the force generated by the rotating impeller blades to transport liquid axially. The reasons why a mixed flow pump is not working in application are as follows:

　　1. The water pump is not rotating, the belt is slipping, or the motor is not rotating.

　　2. The packing is too tight.

　　3. The impeller is stuck or blocked by debris between the impeller and the pump body.

　　4. The bearing housing is not round or damaged.

　　5. The clearance between the impeller and the seal ring is too small.

　　6. Disassembling the pump body.

7. The motor is not rotating, or the speed is very low, the 20ZLB-125 mixed flow pump is not rotating.

8. After the water pump is running, the packing heats up, burns, and smokes.

9. The pump shaft is bent and tense.