Effect of medium viscosity on pump unit
The influence of medium viscosity on pump sets is mainly reflected in the following aspects:
1. The influence of flow rate and head:
When the viscosity of the medium increases, the head curve of the pump will decrease, resulting in a decrease in the head and flow rate of the working condition. This is because the medium with higher viscosity will produce greater resistance when flowing inside the pump body, so that the pump needs to consume more energy to promote the flow of the medium, resulting in a decrease in flow rate and head.
2. The influence of efficiency:
The increase in medium viscosity will lead to an increase in internal energy loss of the pump, thereby reducing the efficiency of the pump. This is because the medium with higher viscosity will produce more friction loss and turbulence loss when flowing in the pump, so that the pump needs to consume more energy to complete the same work.
3. The influence of shaft power:
Although the increase in viscosity will cause the flow rate and head of the pump to decrease, the shaft power of the pump will increase accordingly. This is because the pump needs more energy input to overcome the resistance caused by the viscosity of the medium, resulting in an increase in shaft power.
4. The influence of pump type selection:
When choosing a pump type, the viscosity of the medium is an important consideration. For media with lower viscosity, centrifugal pumps and other types of pumps can generally be selected; for media with higher viscosity, such as slurries, pastes and viscous liquids, it is necessary to select pumps with stronger conveying capacity, such as screw pumps. For example, the G single screw pump is suitable for media with a viscosity of up to 1000000cst, which can meet the conveying needs of high-viscosity media.
5. Impact of operation and maintenance:
The change of medium viscosity will also affect the operation and maintenance of the pump unit. Media with higher viscosity are prone to scale and blockage in the pump body, so the pump unit needs to be cleaned and maintained regularly to ensure its normal operation.
In summary, the viscosity of the medium has a significant impact on the pump unit. When designing and selecting the pump unit, the viscosity characteristics of the medium need to be fully considered to ensure that the pump unit can operate efficiently and stably.
