First, the submersible pump in the pump suction pipe set on the vacuum pump, pump start before the start of the vacuum pump, so that the first water pump filled with water to ensure that the pump automatically and quickly start. This type of water absorption requires a sound automatic control system to ensure proper operation.
Second, relative to the following are also relatively simple: no clogging submersible pump to reduce the water pipe corners, drop height and horizontal interval.
Third, this way need to set up a suction pipe in the pump, the pump in the first run before the tank should be filled with water, the first run after the end of the water tank due to the height of the water pipe height , Although the water level in the pool below the tank surface height, the tank of water will not turn back.
The last way to install the suction end valve at the end of the suction pipe of the submersible pump. The suction valve is actually a check valve, which ensures that the water can only enter the suction pipe from the pool and can not be reversed, so if the suction pipe is filled with water, although the pump axis elevation is higher than the working water level of the pool. The role of the end of the valve, the water pipe will not flow into the pool, the suction pipe has been filled with water, to ensure that the pump can automatically and quickly start.
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After the hub of the pump assembly coupling is assembled on the shaft, the vertical and coaxial degrees of the hub and the shaft should be carefully checked. Usually in the hub of the end and the outer circle set up two dial indicator, turning the wheel when the rotation, observe the hub of the whole beating (including the end of beating and radial run) values, determine the vertical axis and the axis of the axis and coaxial The situation of the situation. Different speed coupling of the requirements of the whole beating different values, different types of coupling on the requirements of the whole beating are also different, but the wheel assembly on the axis after the hub must be the total beating deviation of the value of Design requirements within the tolerance range, which is one of the main quality requirements of the coupling assembly.
Pump assembly caused by the hub of the total beating value does not meet the requirements of many reasons, the first may occur in the manufacturing process due to the error caused by processing for the field assembly, mainly due to correct the wheel hole surface treatment is not correct, so that the hub and axis concentric The degree of deviation. Another reason is that there is a key coupling in the assembly, due to improper assembly of the key caused by the hub and the shaft different axis. The correct installation of the key should be the key side of the key and the keyway wall tightly fit, usually in the assembly with color inspection, with a bad time can be used to repair the file or blade to meet the requirements. Key upper part of the general gap, about 0.1-0.2mm or so. High-speed rotating machinery for the hub and the axis of the coaxial degree of high demand, with a single bond can not get a high degree of coaxial, with double bond or spline connection can make the coaxial degree of both improved.
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The upper part of the submersible motor shaft is equipped with a labyrinth sand control and two return-mounted skeletal seals to prevent flow sand from entering the motor. The submarine motor adopts water lubricated bearing, the lower part is equipped with rubber regulating film, regulating spring, regulating the pressure chamber, adjusting the pressure change caused by the temperature; the motor winding adopts polyethylene insulation, the nylon sleeve sets of water resistant magnetic wire, Cable connector technology, the connector insulation off scraping paint layer, were connected, welding firmly, with raw rubber around a layer.
And then wrapped with waterproof adhesive tape 2-3 layer, the outer layer of 2-3 layers of waterproof tape or glue adhesive layer of rubber (bike tire) to prevent water seepage.
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Frequent use of submersible pump users will have encountered more or less tripping, then you will get the relationship between electricity, this must be caused by a short circuit, this is also a reason. In addition to a lot The reasons for the impact of submersible pump trip, you are not stable current or submersible pump switch bad contact and so on. But sometimes we found that these reasons are not.
There is also a problem with the cable of the submersible pump. Current transformer polarity is connected correctly. After troubleshooting the cause of the equipment failure and wiring errors, the differential protection operates during motor start, indicating that the differential current in the differential circuit exceeds the differential relay setting during this process. Above can be regarded as often cause submersible pump failure reasons, we can follow a certain order, overall troubleshooting first, then troubleshooting partial.
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