If you want to ensure the high efficiency of multi-stage centrifugal pump, then the factors which affect the multi-stage centrifugal pump will be destroyed or controlled within a certain range. We want to know the efficiency of multi-stage centrifugal pump is the volume, hydraulic and mechanical efficiency of the three multiplication of the results. Here we have to talk about the cause of multi-stage centrifugal pump to reduce the effectiveness of what causes.
1. The effect of the pump itself will cause a great impact, the same conditions under their efficiency difference of up to 15%.
2. If the multi-stage centrifugal pump his operating conditions lower than expected, then the pump performance will decline, the energy consumption increased.
3. motor his efficiency is generally not change, so we must be careful when choosing the motor.
4. To pay attention to the efficiency of his machinery will have an impact on the quality, so when we choose a good pump, after the management of the impact is very small.
5. Hydraulic friction and resistance are collectively referred to as hydraulic losses. If the pump after a period of operation, it will inevitably make the impeller wear, this time the loss of water will increase.
6. Because the filter cylinder will appear toxins, intake and other issues, these problems will affect the multi-stage centrifugal pump his evacuation and operation.
7. Before we open the pump operation, pay attention to the appropriate preparation work, if it is not in place so there will be pump cavitation problems, but also make the pump increase the amount of noise, pump efficiency will decline.
Stainless steel centrifugal pump in the operation of the sudden leakage is mostly due to changes in operating conditions or operation, improper maintenance caused.
1) Take the time, cavitation or a long time to suppress pressure, leading to seal damage;
2) The actual output of the pump is too small, a large number of media pump cycle, the accumulation of heat caused by media gasification, resulting in sealing failure;
3) For a long time outage, restart the manual when there is no manual car, friction due to adhesion and tear off the sealing surface;
4) Medium corrosive, polymerizability, gelatinous material increased;
5) Sudden changes in ambient temperature.
So Nanjing lanshen Pump Corp.LTD., to remind you, pay attention to the daily protection of the pump, do not have to start a long time to do the appropriate treatment, pay attention to the pump operating conditions
Submersible pump leakage, if not very serious, generally do not need to deal with, if the submersible pump leakage, but it is necessary to take timely measures. So not only pumping the water is not efficient, and will waste a lot of resources in vain, like the pump with oil ah and so on. This time we can use the exclusion method to find out the reasons, the general reason is that the use of submersible pumps is too long, serious wear, submersible pump seal set bad, or the aging of the sealing device caused. In addition to replacing some of the components of the submersible pump, we can also take simple measures, such as its sealing device is not very good, resulting in this result is a great reason for the loss of elasticity of the seal, this time you can tape a few laps.
1. Installation or maintenance of multi-stage pump shaft and motor shaft size tolerance, causing vibration caused by bearing overheating.
2. The bearing is damaged and the bearing wears to cause the bearing to overheat.
3. Filling Agents, scratching the sleeve to produce overheating affect the bearing.
4. Bearing grease lubricant does not match. Too much will make the bearing overheating.
5. Bearing transparent oil lubricant added too little or leakage, the bearings have to overheat.
6. Lubricant oil tank deterioration or water, but also make the bearing overheating.
7. Bearing cooling water is not enough or interrupted, so that the bearing overheating.
Users’ water consumption is generally dynamic, so water shortage or excess water situation occurs. And the imbalance between water and water is reflected in the water supply pressure, that is, water and water supply less, the pressure is low; water and water supply more, the pressure is large. Maintain the constant water supply pressure, so that water and water can be maintained between the balance, that is, water supply for many times, less water when the water is less, thus improving the quality of water supply.
Constant pressure water supply system is very important for users. In the production of domestic water supply, if the water supply for some reason or lack of water, may affect the quality of life, serious will affect the safety of survival, such as the occurrence of fire, if the water supply is insufficient or water supply, can not fire, Causing significant economic losses and casualties. Therefore, the water area is used constant pressure water supply system, can produce greater economic and social benefits.
With the development of power technology, frequency control technology is improving, with frequency control as the core of the intelligent water supply control system to replace the previous high water tank and pressure tank and other water supply equipment, starting smooth, starting current can be limited to within the rated current, Thus avoiding the impact of the start of the power grid; the average speed of the centrifugal pump is reduced, which can extend the life of pumps and valves and other things; can eliminate the start and stop when the water hammer effect. Its stable and safe operation performance, simple and convenient mode of operation, and complete and thoughtful function, will make water supply to achieve water, energy saving, saving manpower, and ultimately achieve efficient operation purposes.
The deep well infusion techniques of deep well submersible pumps are extremely harmful to human health and the environment, and may minimize the risk of harm, as compared with other disposal technologies such as surface landfill, storage tank or incineration. Because it has the following advantages: Perfusion liquid stored in the deep geological layer, to avoid pollutants into the biosphere circulatory system; can reduce the atmospheric, water and shallow stratospheric environmental pressure; can replace the surface environmental capacity; when the environmental capacity is highly scarce And high processing costs, can reduce the cost of pollutant treatment; expand the scope of pollutant control technology selection. In all cases envisioned by the risk analysis, the risk of deep well infiltration is between one and one millionth of a million, and the safety factor is much higher than other waste disposal techniques.
Drainage pumps used in buildings are submersible sewage pumps, liquid sewage pumps, vertical sewage pumps and horizontal sewage pumps.
As the general site of the building is small, the displacement is not large, the drainage pump can give priority to the use of submersible sewage pump and liquid sewage pump, which liquid sewage pump is generally used in important places; vertical sewage pump and horizontal sewage pump requirements set Earthquake foundation, self-irrigation, and occupy a certain site, so use less in the building.
1.Use low noise water pump.
2.The pump unit should be set vibration device, the base should be installed under the rubber vibration pad, rubber vibration isolator, rubber shock absorber, spring shock absorber and so on. Refer to “Waterproof and installation of water pump and its installation Atlas” SS657.3, in the pump suction pipe and outlet pipe, should be set up vibration devices, such as flexible rubber joints.
4.Pipe stents and pipes through the wall, wear floor, should take anti-solid sound measures, such as the pump room with flexible hanger, elastic bracket or in the wall through the pipe and hole between the glass fiber.
5.If necessary, can be taken on the building sound insulation and sound absorption measures, such as the pump room with double glass doors and windows, walls, ceiling installation of porous sound-absorbing panels.
6.The basis of vibration isolation, pipe vibration isolation and vibration isolation vibration isolation area of the number of layers, the number and number of flexible joints must be calculated.
7.Fire dedicated pump.
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.
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.