Balance of Axial Force in Deep Well Pumps in Production Practice

Balance of Axial Force in Deep Well Pumps in Production Practice

In the production practice, the axial force of the Deep Well Pump is objectively exist, especially high-lift deep-well pump, if the design, operation properly, excessive axial force will lead to bearing burn, shaft damage or broken shaft and so on.In many The problem of excessive axial force, its seriousness has exceeded the efficiency, wear and other factors arising from the problem, a deep-well pump can be safe and stable operation of the decisive factor [19 |. Now on the deep-well pump The development of the axial force balance device is described as follows: Kwan, who put forward a new deep shaft axial force device, the balancing device will be a pair of dynamic and static friction pair installed in the final impeller, the new balance shaft seal device both Balanced axial force, and basically no leakage.Use this device after the pump is reliable, energy-saving effect is significant.Lu Weigang and so on, "a kind of impeller axial balance of its own multi-stage centrifugal pump, impeller inlet seal structure in the end On the basis of the impeller front cover area is greater than the impeller rear cover area, impeller front cover outer diameter and the guide shell with the gap fit, impeller inlet end seal is made to withstand the small axial force Thrust bearing, so as to achieve the effect of completely balancing the axial force by the impeller itself, completely solve the problem of axial force destruction, and can also reduce the production cost of the pump.According to changing the geometric size of the impeller back blade, A kind of balance drum combination device is proposed.The principle of the balance drum is the same as the principle of the balance disc.A combination of the balance drum and the balance disc is put forward.The design of a double- Balance wheel floating impeller balancing device for achieving automatic balance of axial force.

In addition, with the development of computer technology, the application of CFD in fluid machinery is gradually becoming mature. The performance prediction and optimization design of pump based on CFD has basically reached the practical level of engineering, and the calculation of axial force has been involved. Numerical simulation of the internal flow field of the submersible pump is carried out, and the axial force distribution and the axial force calculation and equilibrium analysis are obtained, so the axial force is calculated by numerical simulation and the new equilibrium axial Force method is an effective method for future research.