Views:2 Author:Site Editor Publish Time: 2019-10-16 Origin:Site
What is the froth centrifugal slurry pump operating point?
To understand the significance of the operating point of the slurry pump, the slurry pump can be selected better. The slurry pump working condition refers to the actual water output Q, head H, shaft power N, efficiency n, etc. when the slurry pump is running. These values are plotted on the head curve, power curve, and efficiency curve. This is a specific point. Because the slurry pump is connected to the pipeline, it is subject to the piping.we are provide froth centrifugal slurry pump,We can guarantee quality.
The intersection of the characteristic curve of the slurry pump and the characteristic curve of the pipeline is the working point of the slurry pump, which is also called the operating point. The working point of the slurry pump reflects the instantaneous working condition of the slurry pump.
In addition to the capabilities of the slurry pump itself, the specific location of the slurry pump operating point depends on other factors. The slurry pump operating conditions depend on three factors: the performance of the slurry pump, the performance of the pipeline, and the water level difference between the inlet and outlet.
If any of the factors change, the working point of the slurry pump will change accordingly, and the working point of the slurry pump device actually moves in a relatively wide range.
There are two factors that determine the operating point of the slurry pump:
1inherent working capacity of the slurry pump;
2The working environment of the slurry pump, for example, the operating conditions of all the sewage slurry pump products are calculated according to the clear water, that is, the layout of the pipeline system of the slurry pump and the boundary conditions of the water level of the pool and the water tower.
It must be noted that the head (total head) indicated on the slurry pump label is different from the water head (actual head) when used, because there is a certain resistance loss when the water flows through the water pipe and the pipeline.
Therefore, the actual lift of the slurry pump is generally 10% to 20% lower than the total lift, and the amount of water is also reduced accordingly. Therefore, in actual use, it can only be estimated from 80% to 90% of the head and flow rate of the sign.
The selection of the supporting power of the slurry pump can be selected according to the power indicated on the label. In order to make the slurry pump start quickly and safely used, the power of the power machine can be slightly larger than the power required by the slurry pump, generally about 10% higher. Suitable; if there is power, when purchasing the slurry pump, you can purchase the matching slurry pump according to the power of the power machine.
In practical application, the operating point of the pump: the vane pump such as the centrifugal pump is expressed by the flow rate and the corresponding head; the reciprocating pump is expressed by the differential pressure and the corresponding flow amount: when the pump performance curve is expressed, the blade The intersection of the pump flow and head curve, the differential pressure and flow curve of the volumetric pump and the resistance curve of the pump discharge system is the operating point of the pump.
Problems with packing seals in the use of slurry pumps:
The shaft seal of the slurry pump generally has the advantages of wear resistance, heat resistance, good flexibility and high strength. However, in the case of packing packing, it has the following disadvantages:
1.The surface of the filler is rough, the friction coefficient is large, and there is leakage. In addition, the lubricant that has been immersed for a long time is easily lost.
2,the newly repaired equipment, the shaft seal is in good condition at the beginning of operation, but it will not be used for a long time, the leakage will increase continuously, and the work of adjusting the gland and replacing the packing is also gradually frequent. After running for less than one cycle, the sleeve has worn out. In the form of a vase, the sleeve will be worn out in severe cases, and the packing packing that cannot be replaced behind the water sealing ring has rotted and cannot seal.we are provide froth centrifugal slurry pump,We can guarantee quality.
3.The packing is in direct contact with the shaft and rotates relative to each other, causing wear of the shaft and the sleeve, so the sleeve must be replaced periodically or irregularly.
4.In order to dissipate the frictional heat generated between the packing and the shaft or the bushing in time, the packing seal must maintain a certain amount of leakage and is difficult to control.
5.The friction between the packing and the shaft or the bushing causes the principle of the effective packing of the motor to be reduced, and the power is consumed.
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