跳至主要内容

A modification project for dirty water pump sealing

The mechanical seal of a sewage circulating pump in a factory has been seriously leaking since it was put into operation.It can not be operated normally after several times of replacement.The leakage of wastewater containing organic matter, acid, alkali, salt, etc.It has resulted in varying degrees of corrosion to the equipment,and caused pollution to the environment, the loss is more serious.the dirty water pump leakage become a problem affecting the production of the factory.
After a thorough renovation of the sealing structure of the dirty water pump, good results have been achieved.
Let's talk about the modification design, we will know better about how to make dirty water pump to work better.
Field analysis
This dirty water pump is a cantilever centrifugal pump,Internal rotation, internal leakage, single spring, non - balanced carbide cemented carbide mechanical seal.After disassembly, it is found that the sealing device is seriously damaged and the friction material has been worn and broken,Spring seat was damaged, transmission parts and shaft worn and broken, the impeller and pump connection has heavy wear marks.
These conditions indicate that the pump works with vibration and that the coaxiality of the installation is poor, resulting in greater axial thrust and greater swing.
In addition, there are traces of wear and burn in front of the friction pairs, indicating that the internal circulation cooling structure of the pump is not good, and the cycle is bad.there are a lot of impurities in the circulation liquid, and there are hard particles in it, the dirty water pump is in the lack of routine maintenance.
Corrective actions 
Considering the use of the factory environment, the sealing requirements of the pump is not very high, there are too many hard particles in the circulating liquid,the equipment management level of this factory is low, it is not suitable to choose the mechanical seal of the pump shaft seal.
Therefore, transformation design scheme selection combined new type packing seal instead of the original mechanical seal
.This project design has the advantages of less investment, low installation cost and low maintenance requirements, it completely can meet the sealing requirements. It is very suitable for the actual situation of the factory.
We chose carbon fiber and flexible graphite as a sealing mechanism, Flexible graphite has not only low friction factor, but also good self lubrication performance and high resilience, the flexible graphite also has enough floating performance, can be well attached to the shaft, to prevent leakage. In this scheme, carbon fiber packing with high strength, good heat resistance, good corrosion resistance and erosion resistance has been added.The graphite packing is adopted in the middle five layers, which makes the material rebound well,the material of sealing has good elasticity, low friction coefficient, high and low temperature resistance, softness, corrosion resistance and good self lubrication
After modification of the dirty water pump ,since the pump was put into operation, the effect has been very good, almost reached the level of no leakage, and the axle temperature is completely normal.
More information,please contact us,we can make free pump system design for you!

评论

发表评论

此博客中的热门博文

Causes of Electric Motor Burning by Water pump

1. First, find out whether the motor burns the bearing (mechanical fault) or the coil (electrical fault). If it is the fault of burning coil, it is mainly caused by overcurrent, sometimes too high or too low voltage will also cause the coil to heat and short circuit, so check that the voltage when running is too different from the rated voltage.There may be several reasons for over-current short-circuiting: A. the equipment is overloaded to make the motor run for a long time at rated or over rated current. In particular, the starting current of the motor is 3-5 times that of the rated current. Therefore, we should try to avoid running with load or full load when starting the equipment (mainly depending on the matching allowance of rated current and normal operating current of motor). B, the motor works in a wet working environment. The insulation of the coils should be checked before the motor starts. The insulation requirements of different voltage grades are also different. May r...
发表评论
阅读全文

Several type of pumps for changing human life

Today we will talk about several type of water pump ,which changes our life. 1, Booster pump :The last decades,people who lives in high building can feel pains caused by the low water pressure,especially in rush hour.But now,the convenience booster pump takes to us become a part of our life. We nearly forget it exist.In nowadays,building is taller and taller,but even on the top of the high cloud bulding,the flow of water is also very stable and strong. 2,Ro booster pump:As ro technology developed,ro booster pump step into our daily life,since the pump appeared ,make water clean and safety is not a hard work,this type of pump helps a lot of people drink clean water,avoid disease,especially some people who is required only drink purified water,do not need to pay too much money to buy purified water,we can get it anywhere.Even in desert,bottle water can be brought easily.some sweet water purified by sea water,how magical pump is it? 3, Aquarium water pump ,fishes which we can see on...
发表评论
阅读全文

How much is the stainless steel water pump?

We are very concerned about the price of the stainless steel centrifugal pump? How much money of stainless steel pump, in fact, this has a great relationship with product quality,some stainless steel pump like Grundfos,the price is higher, the quality is good. But there are also some stainless steel water pump,like Gelaili pump,the quality is good, but the price is not so high,it’s like buying a steak with the cabbage money. There are some small factories, the quality of their water pump production is not stable, the user experience is very poor, the price is very cheap, but in the process of using, maintenance costs have far exceeded the saved money when the pump was brought down. Therefore, how much is the stainless steel pump, really depends on the quality of the product, there is no enterprise willing to do business at a loss. How much is the stainless steel pump, stainless steel pump manufacturers and production experience affected price.Grundfos pump manufacturing history, c...
发表评论
阅读全文