The working principle and structure of mixed flow pump

Category: Water pump knowledge

2024-08-09

mixed flow pumpAlso known as mixed flow pump or mixing pump, it is a kind of fluid conveying equipment, which is widely used in industry, agriculture and municipal fields. Mixed flow pump is a kind of high-efficiency conveying equipment that combines the characteristics of centrifugal pump and axial flow pump. It not only has the characteristics of high head of centrifugal pump, but also has the characteristics of large flow of axial flow pump, so it performs well in the process of dealing with large flow, medium and low head liquid transportation. Its operating principle and structural features allow it to handle a variety of fluids and provide high efficiency while maintaining relatively simple operation and maintenance.

1. working principle

The working principle of mixed flow pump is based on the combination of centrifugal pump and axial flow pump. When the prime mover (such as an electric motor or a diesel engine) drives the impeller to rotate, the impeller drives the fluid to generate centrifugal force and form a pressure gradient. The fluid flows into the impeller from the inlet under the action of the pressure gradient, and flows out from the outlet after the acceleration and pressurization of the impeller. In this process, the fluid gains energy and is transported into the pipeline network. The characteristic of the mixed flow pump is the design of its impeller, which can handle axial and radial flow at the same time, making the fluid mixing more uniform.

The working principle of the mixed-flow pump is to use the combined action of centrifugal force and axial force to achieve the delivery of liquid. When the motor starts, the impeller starts to rotate, the liquid is sucked into the pump casing, and the flow is accelerated under the action of the impeller. When the impeller rotates, the liquid is subjected to centrifugal force and axial force at the same time, which changes the flow direction and is finally discharged from the outlet.

2. structure characteristics

The structure of the mixed-flow pump is relatively simple, mainly composed of a motor, a pump casing, an impeller and a guide vane. The motor is the driving force source of the mixed flow pump, which drives the pump shaft to rotate by providing power. The pump casing is the part that contains the water flow and provides pressure. It is usually welded with cast iron or steel plate and has good sealing performance. The impeller of the mixed-flow pump is a key component. It is located in the pump housing and is responsible for sucking the liquid in and accelerating the flow, and then pushing it to the outlet. The guide vane is a component located at the rear of the impeller. Its function is to control the direction of fluid flow and ensure that the fluid can be smoothly turned and discharged after flowing through the impeller.

The structure of the mixed flow pump is relatively simple, mainly composed of the following parts:

1. Impeller: The core component of a mixed-flow pump, responsible for generating the kinetic energy and pressure required for fluid flow. The design of the impeller determines the flow and head of the pump.

2. Pump casing: protect the impeller from the external environment, while guiding the fluid flow from the inlet to the outlet.

3. Import and export: the channel for fluid to enter and flow out, different interface sizes and shapes can be selected according to actual needs.

4. Shaft and bearing: connect the prime mover and impeller, responsible for transmitting power. The bearing supports the operation of the shaft to ensure the smooth operation of the pump.

5. Sealing device: a device to prevent fluid leakage, usually a mechanical seal or packing seal.

6. Other accessories: including base, flange, anchor bolts, etc., used to fix and support the entire pump body.

Mixed flow pump not only has the characteristics of high head of centrifugal pump, but also has the characteristics of large flow of axial flow pump, so it is widely used in the industrial field of water treatment, water supply, water supply and drainage and other fields. Its working principle is simple and efficient, and its structure is compact and reliable. For occasions where the demand for liquid transportation is large, the mixed flow pump is an ideal choice.

Mixed flow pump has a wide range of applications, suitable for conveying water, sewage, mud and other fluids. Its simple structure, convenient operation and stable performance make it show good performance in various environments. In addition, the mixed-flow pump also has good energy-saving performance, which can effectively reduce operating costs.

In short, the mixed flow pump through the combination of centrifugal and axial flow, to achieve the effective delivery of a variety of fluids. Its simple structure, stable performance and wide application make it play an important role in the fields of industry, agriculture and municipal administration.

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