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.
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.
The minimum submerged depth of the pump is a prerequisite for proper operation of the pump. The samples on the factory are marked with clear data. The Panda pump indicates that the data is calculated on the basis of:
1. According to the pump’s abundance allowance calculation, to ensure that the pump does not occur cavitation.
2. For submersible pumps in the upper part of the motor, if the motor cooling cycle is not installed, the entire motor is immersed in water to cool the motor stator.
3. The minimum submerged depth is to ensure that the pump running, the sink does not occur in the whirlpool, the air is not involved in the import of the pump, and to ensure that the liquid flow into the pump evenly distributed.
Moreover, Nanjing lanshen Pump Corp.LTD. found that some pumping stations due to the flow and inhalation pool conditions are limited, the pump running after the change in the water level is very large, inhalation tank water level, resulting in the actual submerged depth below the minimum submerged depth, resulting in the pump can not run properly, Cavitation. Such as a pumping station, suction pool minimum water level elevation of 1m, up to 4.5m, water depth difference of 3.5m. If the pump station is designed according to the 1m elevation, the whole pumping station is dug deep and the elevation design is raised. The submerged depth is less than the minimum submerged depth.
Many industries will use submersible pumps, agricultural irrigation will also use submersible pumps, but the use of agricultural irrigation submersible pumps and most industries, after all, will be different. Now used to irrigate the drains of the land has been rare, but rather the more common submersible pumps for land irrigation, we will look at the use of agricultural submersible pump requirements.
Suitable for agricultural irrigation submersible pumps when installed, the pump should be ramped to reduce the elbow, or install the volute turn, so that the outlet can be facing the pool. As far as possible to shorten the submersible pump pipeline, we remove one meter of steel pipe, ten hours of irrigation work we can save 0.21 kg of diesel, a long time the greater the amount of diesel fuel savings, try to expand the submersible pump outlet diameter , If we put a four-meter-long 10 cm water hose into a 15 cm pipe, we can save 0.5 kg of petrol per ten hours.
In the submersible pump water can be kept clean, we can remove the filter. In order to prevent the impeller ring and axial clearance is not appropriate, we are in use, should be based on the submersible pump pump factory instructions to adjust, for submersible pumps in the pipeline blockage, we have to promptly clear, so as not to affect the submersible pump Normal work to prevent the submersible pump into the gas pump, because the pump intake will reduce the pump water, in order to prevent this situation, we should be in the submersible pump to check the various parts of the maintenance.
Crankshaft is an important part of the submersible pump, in the course of the use, it is often damaged, how to try to maintain its life, as we urgently need to solve the problem, then we introduce the submersible pump crankshaft daily maintenance measures:
1.Submersible pump crankshaft normal operation of the submersible pump every 8h maintenance time, by the shift pump workers, every 2h tour check a submersible pump and motor operation.
2.Check the submersible pump oil is in line with the requirements, there are problems in a timely manner to add or replace, to ensure that the lubrication of the normal work.
3.Check and adjust the submersible pump packing letter, and to ensure that the fixed, connecting bolts without loosening.
4.Check the unit vibration operation without abnormal sound, should meet the requirements of this standard, the instrument action sensitive and accurate.
5.Submersible pump crankshaft equipment to deal with leakage and do a good sanitation work.
The above is about the submersible pump crankshaft daily maintenance of the relevant matters related to the introduction, in the daily use of attention to these points will be able to ensure the normal operation of the submersible pump to extend its service life.
At present, China’s low-end pump industry has been basically realized in the field of domestic, high-end areas also by virtue of cost, service and other advantages to achieve the gradual replacement of imported products, and is committed to the pump industry, international competition. But in the impact of internal and external factors and many uncertain factors under the impact of domestic-funded enterprises in order to achieve the simultaneous development of the market, need to speed up the casting of “domestically produced advantages” in order to counter the international giants of flooding the pump market in China.
China’s pump industry is now in a relatively favorable demand for the development period, but also because of this many companies are trying to valve enterprises to expand the scale to achieve long-term or sustainable growth. At the same time, China’s pump industry has also ushered in a lot of new subjects to join. However, it is precisely because the collision between the two sides led to a “big but not strong,” the status of the pump industry.
From this, China’s pump industry in order to achieve sustainable development, expansion of enterprise scale is on the one hand, strengthen enterprise technology research and development and product development capability is the key. In other words, in the homogenization of the more serious at this stage, in order to maintain or stimulate the development of an industry must be to differentiate the competitive advantage to support, and “differentiated competitive advantage” is necessary to meet the current economic development needs But also to meet the target market demand, so as to achieve a sustainable development of China’s pump industry.
Lanshen Group production of submersible sewage pumps, submersible sewage pump is mounted in front of the base will be tightness tested to ensure that each sewage pump are qualified products.
Nanjing lanshen Pump Corp.LTD., founded in 1958,after 50 years of development, is now a registered capital of 50 million yuan, with assets exceeding 400 million yuan, accounting for area of 280 acres. China’s first submersible sewage pump and mixer in the birth and to fill the gap. Currently has a centrifugal pump, switch type electric control, water treatment equipment for mass production of special machines ability to produce its own sewage plant and pumping station for more than 70% of the equipment.
Lanshen Pump R & D and manufacture Submersible Sewage Pump ,sewage pump,axial pump,submersible sewage pump.
Submersible sewage pump because of the pump and motor shaft rotation, short, coaxial weight, so bearing parts of the radial load was relatively small, life than general pump is much longer. Don’t exist cavitation damage and irrigation water, etc. Especially after a operator has brought great convenience. Vibration noise, low temperature, motor of air pollution. In municipal engineering, industrial, building, hotel, hospital, water conservancy construction and other industries plays a very important role.
The key of submersible sewage pump is reliability problems, because of the use of sewage pump diving in liquid is under the situation, Transmission medium containing some solid materials is mixed liquid. Pump and motor on very near, pump for vertical layout, rotating components with impeller under water stress weight above. These problems are made in diving sewage pump seal, motor bearing capacity, bearing arrangement and the requirements of the selection of sewage pump than average.
In order to improve the life, submersible pumps manufacturer in the pump to protect system, namely in the pump leakage occurs, overload, overtemperature fault can make the automatic alarm, and automatic stop for repair. The submersible sewage pump set protection system is necessary, it can effectively protect the safe operation of pump.
Submersible sewage pump is provided which is adapted for location in a sump or the like, and which includes a motor case, a driving motor, an impeller case, and an impeller located in the impeller case, the impeller defining a back shroud space between its upper face and the confronting, superjacent portion of the impeller case.
The usual submersible pump is sealed against fluid entry for operation in a submerged condition, and is designed to be cooled by the liquid material within which it is submerged. Dangerous overheating can occur if such a pump is not operated in a submerged condition, and such overheating may result in burning or explosion of the motor.
The apparatus includes a vent which opens at one end into the back shroud space and at the other end opens to the exterior of the impeller case. Whenever air is drawn or injected into the low pressure vortex area of the sewage pump for controlling the amount of liquid discharged, the air collecting in the back shroud space is constantly vented to facilitate operation of the impeller and reprime the pump.