The Head And Stage Of A Stainless Steel Multi-stage Pump Have A Certain Proportional Relationship

Aug 16, 2024

A multi-stage pump is a high-pressure pump composed of two or more single-stage pumps. The head calculation formula is: H=H1+H2+...+Hn, where H1, H2,..., Hn are the heads of single-stage pumps, respectively. A multi-stage pump is a composite mechanical device composed of multiple similar single-stage pumps connected in series. They connect the drainage end of each single-stage pump to the suction end of the next single-stage pump through some special connection methods. Multi stage pump is a small and lightweight mechanical equipment, which is widely used in municipal water supply, industrial circulation, fire protection systems and other fields due to its advantages of high head and large flow rate.
During normal operation, there is a certain proportional relationship between the head and the number of stages of a stainless steel multi-stage pump. The total head increases with the number of stages of the pump, and the relationship between the head and power is not significant. It is closely related to the diameter of the pump impeller and the number of stages of the impeller. The larger the stage, the higher the water lift. Below are the relationships between the head and the number of stages of a stainless steel multi-stage pump.
The relationship between head and number of stages is as follows:
1. The head of the water pump is directly proportional to the number of stages, which is achieved by increasing the number of stages of the pump by adding impellers to increase the total head.
2. The total head of a stainless steel multi-stage pump is equal to the single-stage head multiplied by the number of stages.
3. The relationship between head and power is not significant, but rather related to the diameter of the impeller and the number of impeller stages. The larger the stage, the higher the water lift.
Other factors that determine the size of the lift:
1. Relationship with the number of leaves
When other values are constant, there is no flow loss. For impellers with the same diameter, an increase in the number of blades will also increase the head.
2. Relationship with rotational speed
According to Euler's equation, the higher the rotational speed, the greater the theoretical head.
3. Relationship with the placement angle β 2A at the blade outlet
If it is a fixed value, a larger blade outlet angle will increase the theoretical head with an increase in flow rate, while a smaller blade outlet installation angle will decrease the theoretical head with an increase in flow rate.
What is the head and stage of a water pump:
Head refers to the height at which a water pump can lift water, usually represented by "H" in meters. The head of a water pump is generally composed of the suction head and the pressure head. The number of stages represents the number of impellers and the multiple of head. One impeller is called a single-stage pump, with a stage of 1 (usually not labeled). A multi-stage pump with a stage of 2 or above is called a multi-stage pump, and the stage of the multi-stage pump should be marked. For example, 3 stages indicate that there are 3 impellers.