Installation of pipeline centrifugal pump and factors affecting the efficiency of centrifugal pump

Pipeline centrifugal pump is a very common pump, pipeline centrifugal pump installation you should check the fasteneris loose phenomenon, there is no blockage of pump flow, so as to avoid damage during the operation of water pump impeller and pump body, don't put the weight of the pipe and in the pump, the pump body is to avoid deformation. Here is a brief introduction of the installation method of pipeline centrifugal pump:
1 pipeline centrifugal pump installation technology is the key to determine the installation height of the pump.
The height is the vertical distance from the water surface to pump impeller center line, and it allowed to smoke confused on a high vacuum, high vacuum suction on the vacuum pump inlet section refers to the value of the pump product specifications or nameplate is allowed, and the water temperature at 1 standard atmospheric pressure, 20 degrees Celsius, the determination of test. It does not take into account the current situation of water after the water pipe.
The pump installation height should be allowed to suck up the vacuum after deducting the suction pipe loss head, the remaining part of the value, it is to overcome the actual height of water absorption. Pump installation height can not exceed the calculated value, otherwise, the pump will not draw water to.
2 calculated values affect the size of water pipe resistance loss of lift, therefore, should adopt the shortest piping layout, and minimize the elbow and other parts, can also be appropriately equipped with larger diameter pipe to reduce the flow tube.
3 it should be noted that the installation location of the pipeline centrifugal pump elevation and water temperature is different from the test conditions, such as local elevation more than 300 meters or more than 20 degrees Celsius water temperature, the calculated value to be modified.
Atmospheric pressure at different altitudes and the saturation vapor pressure at temperatures above 20 degrees celsius. However, when the water temperature is below 20 degrees Celsius, the saturated vapor pressure is negligible.
4 from the pipeline installation technology, suction pipes require strict sealing, no leakage, Water Leakage, otherwise it will damage the intake pump vacuum to pump out the water, even when serious pumping Sheung shui.
Therefore, to do a good job in the pipeline interface, to ensure the quality of the construction of the pipeline connection.
Several factors affecting the efficiency of pipeline centrifugal pump:
1 pipeline centrifugal pump itself efficiency is the most fundamental impact. Under the same working conditions of the pump, the efficiency may be a difference of more than 15%.
2 the operating condition of the pipeline centrifugal pump is lower than the rated condition of the pump, the pump efficiency is low and the energy consumption is high.
3 motor efficiency in the use of basic remain unchanged. Therefore, it is important to choose a high efficiency motor.
4 the influence of pipeline centrifugal pump efficiency is mainly related to the design and manufacture quality. Pump selected, the late management of small.
5 hydraulic loss, including hydraulic friction and local resistance loss. After running a certain period of centrifugal pump, the impeller and guide vane are inevitably to be worn out, the hydraulic loss is increased, and the hydraulic efficiency is reduced.
6 pipeline centrifugal pump volume loss, also known as leakage loss, including impeller seal ring, the class, the axial force balance between the three kinds of leakage loss. Volume efficiency is not only related to the design and manufacture, but also with the management of the late. After running for a certain period of time, due to the friction between the components, the gap increases, the volume efficiency decreases.
7 as the filter cylinder block, intake and other causes of pipeline centrifugal pump and idling.
8 pipeline centrifugal pump before the start, the staff do not pay attention to the centrifugal pipeline pump before the start of the preparation work, heating pump, plate pump, infusion pumps and other basic operating procedures are not complete, often caused by pump cavitation, causing the pump noise, vibration, low pump efficiency.
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