1.Check the rationality of pump selection:
According to the pump performance and pipeline system, check the pump in the design of the head, the maximum head and minimum head when the operating parameters. Requirements in the design of head, the pump in the efficient range of operation; in the highest and lowest head, the pump can run safely and stably. Such as a pump station, the design of pump head 4.24M, perennial running head 2.5~4.2m, and the design of the axial flow pump head 7.0m. Because the pump often work under the low head, so that the operating point of the high efficiency zone, and the efficiency curve of the axial flow pump is more steep, the efficiency of pump operation is greatly reduced, resulting in long-term low efficiency of pump operation.
Main causes of low lift pump long-term operation is: this kind of multi pump station was built in twentieth Century 50? 60s, the pumping station design due to pump type less, no suitable pump optional; or because of the lack of supply, and engineering and eager to start, can only choose other pump types; in addition to the high guarantee rate to determine the design head high. Even some of the highest lift pump selection, resulting in the actual head below the pump head design.
After the review for lift, power and turn Hunchun supporting unreasonable water pump should be adjusted or modified.
2.Reasonable adjustment of pump performance:
If the performance parameters of the pump operating point does not meet the actual needs, the pump operation deviate from the long-term high efficiency area, using the method of changing the pump performance curve to adjust the operating point of the water pump to work, to meet the actual needs. For the centrifugal pump and pump (speed n, <350), can be adjusted by the speed reducer and method. For the blade adjustable axial flow pump, mixed flow pump, the general use of speed, variable angle adjustment method. The three ways to regulate the pump operating point of the method has been described before, and here is no longer repeat.
3.To strengthen the maintenance of water pumps :
Pump for a long time to run, it will inevitably produce wear and tear, increase the energy loss of the pump, reduce the efficiency of fixed submersible sewage pump. Therefore, to strengthen the monitoring work, timely maintenance, replacement of damaged parts, to ensure long-term efficient operation of the pump.
4. Ensure the installation quality of water pump :
The working performance of the pump is good or not, it has a great relationship with the installation quality of the pump. If the installation quality does not meet the requirements, not only to reduce the efficiency of the pump, it will also produce a serious vibration and noise, causing overheating of the motor, and even can not run. The vertical unit to ensure that each axis in the same vertical line. Vane adjustable axial flow pump and mixed flow pump, the installation angle of each blade should be equal. For the case of water pump, the axis of the spiral case and the impeller axis should be coincident, if the deviation from running to produce vibration, affect the efficiency of the pump.
