What is the reason for the low speed of the multi stage centrifugal pump after startup?

(1) human factors. Some users because of original motor damage, may be accompanied by another motor, resulting in a flow of small, low head or even the consequences of Sheung shui.

(2) the mechanical failure of the centrifugal pump. Impeller and pump shaft fastening nut loose or pump shaft deformation and bending, resulting in multi impeller, direct friction with the pump body, or bearing damage, it is possible to reduce the pump speed.

(3) power machine maintenance. Motor due to the winding burn, and loss of magnetism, maintenance of the winding turns, wire diameter, wiring method changes, or the failure of the maintenance of the fault is not completely eliminated factors will make the pump speed change.

(4) before starting the multi-stage centrifugal pump is not filled with enough water, sometimes it looks like the water from the vent overflow, but did not turn the pump shaft to the air completely discharged, resulting in a little air left in the water pipe or pump body.

(5) in contact with the multistage centrifugal pump inlet of the horizontal application of reverse flow direction, fell more than 0.5 slope, connect one end of the highest import pumps, do not completely level. If the upward tilt, will be retained within the inlet air, reduce water pipes and pumps in the vacuum, the impact of water.

(6) a multistage centrifugal pump packing has been used for long-term wear or packing pressed too loose, discharge gap caused by the large amounts of water from filling with the shaft sleeve, the external air gap into the pump from the inside, affected the water.

(7) because of the long-term potential of the water pipe, the pipe wall corrosion appeared holes, the water level of the multi-stage centrifugal pump was decreased. When these holes are exposed, the air enters the water inlet pipe from the hole.

(8) there is a crack in the water inlet pipe bend pipe, the water inlet pipe and the water pump connection in the small gap, it is possible to make the air into the water inlet pipe.

Analysis of the development status of vertical single stage centrifugal pump

Pump began to take root in the country since 60s, economic development and living standards for the pump market have more choices, the development of China economy promotes people to improve the quality of life, improve the quality of life of colleagues and to promote the development of the industry as one of the beneficiaries is the pump, pump, began to emerge in all walks of life quickly the development of the domestic pump market also blossom everywhere, showing a momentum of prosperity. Centrifugal pump on the basis of the development of a new kind of pump can be extended out: vertical single - stage centrifugal pump. This is a more superior performance of the type of centrifugal pump.

There is vertical single-stage centrifugal pump centrifugal pump, gives a chance of development, compared with the conventional centrifugal pump, vertical single-stage centrifugal pump has its unique advantages, has also been recognized by the people, is very popular in the industry, and the dosage gradually increased, there have been many domestic the manufacturer, Zhuluzhongyuan competition, large and small enterprises want to share, which led to the market heavy load, small enterprise development limited, the gradual emergence of vicious competition, this competition to bring to the market impact, began to vicious spiral.
And, with the growth of demand, future not only for enterprises, will also have higher requirements for vertical single stage centrifugal pump, this will eliminate a number of poor capacity of enterprises, the result must be mighty wave crashing on a sandy shore, the survival of the fittest, but a protracted process, for the current pump, no chaos can not afford such a protracted war.
The imported products began streamed in people's lives, will produce a certain pressure on the existing domestic enterprises. Therefore, the development of vertical single stage centrifugal pump to promote more powerful, independent innovation is one kind of driving force, independent innovation industry enterprise is equivalent to the self-help industry.
Jiangsu Quan Department of domestic well-known liquid pump enterprises, shouldering important responsibility pump development, always adhere to innovation, the introduction of technology of fresh, exercise their ability to pump output, it can promote the development of enterprises with more pump to drive their own development, and ultimately, to obtain even win-win good situation.