Pump characteristics test device and definition

Pump characteristic test device includes auxiliary pump, flow measurement pipeline, pressure measurement pipeline, valves, measuring instruments and other auxiliary pipeline. Among them the flow measuring line, the pressure measuring line, the valve, the measuring instrument and other auxiliary lines and the pump under the normal operating conditions are the same. The difference is the choice of auxiliary pump. Auxiliary pump flow and head of the test can play a decisive role in smooth development, under normal circumstances, the auxiliary pump flow should be used at least 2-3 times the pump being tested, lift at least because of the test pump 2-3 times . Speed ​​of zero in special conditions to measure the torque to use static torque sensor, the range of his selection can be calculated according to the auxiliary pump output power, but to consider the pipeline loss, pump loss and other factors

The so-called pump performance test refers to the performance test under normal operating conditions, but also the pump is running in the positive, positive (impeller export energy greater than the imported energy), positive flow (liquid flow from the suction port to the discharge port) Positive torque (the original motivation mechanical energy to the liquid) conditions. Contrary to the above, respectively, known as reverse, negative lift, negative flow, negative torque. Under special operating conditions, the pump can operate with one or more of these parameters negative. The four-quadrant characteristics of the pump refer to different combinations of these parameters.

Due to the increasing use and application of pumps, it is often the case that several pumps are operated in series or in parallel. This may cause other pumps to operate abnormally due to a pump failure. In addition due to the different use of the pump, the pump may also be reversed operation of the situation. Therefore, people are paying more and more attention to the characteristics of the pump under various working conditions. Therefore, studying the four-quadrant characteristics of the pump is essential to the designer of the pump.

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