Characteristics of the diagonal flow pump
As we all know, the axial flow pump uses large flow rate and low lift. Its main advantages are simple structure, small volume, light weight and floor space. The single disadvantage is that the performance of the small flow area is unstable. As the flow rate decreases, the shaft power increases sharply. The axial flow pump has a narrow efficiency range and cannot be used in applications where the head change is large. Centrifugal pumps have excellent hydraulic performance, but are not suitable for use in teaching low lifts. The structural performance of the oblique flow pump is between the axial flow pump and the centrifugal pump. It is an ideal pump type that takes advantage of the centrifugal pump and the axial flow pump to compensate for the two disadvantages. The scope of use is toward the traditional centrifugal pump and axial flow. The range of pumps has expanded.
The working principle of the diagonal flow pump
The name of the oblique flow pump: compared with the centrifugal pump and the axial flow pump, the difference of the mixed flow pump is that the outlet side of the impeller is inclined, and when the water flows out from the impeller, it is subjected to centrifugal force and thrust, and the flow direction is between radial and The axial flow is inclined, so the mixed flow pump is called a diagonal flow pump.
The shape of the impeller of the mixed flow pump is between the centrifugal pump and the axial flow pump. It has the characteristics of the centrifugal pump impeller and the characteristics of the axial flow pump impeller. When the mixed flow pump is working, it has the characteristics of the centrifugal pump and the axial flow pump. The water flow generates both centrifugal force and water thrust. The mixed flow pump relies on these two forces to pump water. Like the centrifugal pump, a certain vacuum low pressure zone is generated behind the impeller to pump water.
When the impeller rotates rapidly, the water in the impeller is emitted from the periphery of the impeller by centrifugal force, resulting in a vacuum (low-lying zone) at the center of the impeller, where the pressure is lower than atmospheric pressure, and the downstream water surface acts on atmospheric pressure. The water of a F swim flows from the downstream to the center of the impeller under the action of the downstream water surface atmospheric pressure and the low balance of the pump impeller to form the brigade.
Comparison of advantages and disadvantages of oblique flow pump and axial flow pump
As we all know, the axial flow pump uses large flow rate and low lift. Its main advantages are simple structure, small volume, light weight and floor space. The single disadvantage is that the performance of the small flow area is unstable. As the flow rate decreases, the shaft power increases sharply. The axial flow pump has a narrow efficiency range and cannot be used in applications where the head change is large. Centrifugal pumps have excellent hydraulic performance, but are not suitable for use in teaching low lifts. The structural performance of the oblique flow pump is between the axial flow pump and the centrifugal pump. It is an ideal pump type that takes advantage of the centrifugal pump and the axial flow pump to compensate for the two disadvantages. The scope of use is toward the traditional centrifugal pump and axial flow. The range of pumps has expanded.
The working principle of the diagonal flow pump
The name of the oblique flow pump: compared with the centrifugal pump and the axial flow pump, the difference of the mixed flow pump is that the outlet side of the impeller is inclined, and when the water flows out from the impeller, it is subjected to centrifugal force and thrust, and the flow direction is between radial and The axial flow is inclined, so the mixed flow pump is called a diagonal flow pump.
The shape of the impeller of the mixed flow pump is between the centrifugal pump and the axial flow pump. It has the characteristics of the centrifugal pump impeller and the characteristics of the axial flow pump impeller. When the mixed flow pump is working, it has the characteristics of the centrifugal pump and the axial flow pump. The water flow generates both centrifugal force and water thrust. The mixed flow pump relies on these two forces to pump water. Like the centrifugal pump, a certain vacuum low pressure zone is generated behind the impeller to pump water.
When the impeller rotates rapidly, the water in the impeller is emitted from the periphery of the impeller by centrifugal force, resulting in a vacuum (low-lying zone) at the center of the impeller, where the pressure is lower than atmospheric pressure, and the downstream water surface acts on atmospheric pressure. The water of a F swim flows from the downstream to the center of the impeller under the action of the downstream water surface atmospheric pressure and the low balance of the pump impeller to form the brigade.
Comparison of advantages and disadvantages of oblique flow pump and axial flow pump
Diagonal flow pump | Axial flow pump |
High lift (20m or more) | Low lift (to 10m) |
Wide range of applicable lifts | Applicable narrow range of head change |
The power curve is flat and can be turned off again. | The power curve is very steep and cannot be operated near the dead lift point |
High efficiency range | Narrow range of efficiency |
Adapt to a wide range of flow, continuous operation in situations where small flow is required | When a small flow is required, the intermittent operation can only be started frequently. |
Complex structure, slightly sized | Simple structure and small size |
Not easy to cavitation | Cavitation is prone to occur under the same conditions |
Easy to start | Hard to start |
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