There is a positive proportional relationship between the lift and the series of stainless steel multistage pumps

Category: Water pump knowledge

2024-07-12

multistage pumpIt is a high-pressure pump composed of two or more single-stage pumps. The lift calculation formula is: H = H1 H2... Hn, where H1, H2,... and Hn are the head of the single-stage pump, respectively. Multi-stage pump is a composite mechanical equipment composed of multiple similar single-stage pumps connected in series. They connect the drainage end of each single-stage pump with the suction end of the next single-stage pump. Multi-stage pump is a kind of small size, light mechanical equipment, because of its high head, large flow advantages, is widely used in municipal water supply, industrial circulation, fire protection systems and other fields.

During the normal operation of the stainless steel multi-stage pump, there is a certain proportional relationship between the lift and the series. The total lift increases with the increase of the series of the pump, and the relationship between the lift and the power is not big. It has a great relationship with the diameter of the pump impeller and the series of the impeller. The larger the series, the higher the lift. Here is what is the relationship between the lift and the series of the stainless steel multi-stage.

The relationship between lift and series has the following points:

1. The pump head is proportional to the series, and the total head is increased by increasing the impeller to increase the series of the pump.

2. The total lift of the stainless steel multi-stage pump is equal to the single-stage lift multiplied by the number of stages.

3. The relationship between head and power is not big. It is related to the diameter of the impeller and the series of the impeller. The larger the series, the higher the water.

Other factors that determine the size of the head:

1. Relationship with the number of blades

When the other is a fixed value, there is no flow loss. For an impeller with the same impeller diameter, the head will increase as the number of blades increases.

2. Relationship with speed

According to the Euler equation, the higher the speed, the greater the theoretical head.

3. Relationship with blade outlet placement angle β2A

If it is a fixed value, the blade outlet angle is large, the theoretical head of the flow increase will also increase, and the blade outlet placement angle is small, the theoretical head of the flow increase will also decrease.

what is the pump head and series:

Head refers to the height at which the pump can lift water. Generally, "H" is used instead, and the unit is m. The head of the pump is generally composed of the suction head and the pressure head. The number of stages indicates the number of impellers and the multiple of the head. An impeller is called a single-stage pump, and the number of stages is 1 (generally not marked). More than 2 stages are called multi-stage pumps. The stages of multi-stage pumps should be marked. For example, 3 stages indicate that there are 3 impellers.

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