1 to eliminate shaft channeling large measures

　　Rational design of the axial force of the balancing device, and to eliminate the axial amount of channeling. In order to meet this requirement, multistage centrifugal pump, ideal design: a balance disc and axial thrust bearing, balanced by balance disc axial force by the axial thrust bearing on the shaft axial limit; another balancing drum and the axial thrust bearing, to balance out the majority of the axial force by the balance drum, the remaining of the axial force by the thrust bearing bears the axial thrust bearing on the shaft axis limit. The second key to the program is reasonably designed balance drum, so that can really balance out most of the axial force. For single-stage pump, pump products, designed to take some measures to ensure that within the scope of the pump shaft channeling the required amount of mechanical seal.

　　2 measures to eliminate axial force is too large

　　Reasonable design axial force balance mechanism, so really fully balance out the axial force to create a favorable condition for mechanical seal. Important for applications in the field of power plant, petroleum, chemical and other products, before the product is shipped, you must do Channel test to detect and identify and solve problems. Some important pump rotor design of an axial force measuring ring at any time to monitor the size of the axial force, the problems to solve.

　　3 to eliminate the pump shaft deflection is too large measures

　　This phenomenon is mostly horizontal multistage centrifugal pump designed to take the following measures:

　　(1) to reduce the distance between both ends of the bearing. Pump impeller of the series is not too much, in the case of higher pump head requirements, try to improve each stage impeller head, reducing the number of stages.

　　(2) increasing the diameter of the shaft. In the design of the shaft diameter, do not simply consider only the size of the transmitted power, mechanical seals, shaft deflection, starting methods and the inertial load, radial force and other factors to consider. Many designers do not fully understand it.

　　(3) improve the level of the pump shaft material.

　　(4) after the completion of the pump shaft design, shaft deflection to check the test calculation.