Vertical axial-flow pump belongs to the blade, the pump has the big flow, low head, high rotation, high efficiency, cover an area of an area small, performance parameters variability, and suitable for low water conditions, etc. Accordingly, often become agriculture irrigation and drainage, city water supply and drainage, power transmission project priority of circulating water pump type selection.

First, basic structure and function

By breathing in pools of water flow through to, through the inhaled horn tube, because indoor impeller impeller in force water rotation, and water into the diffuser, body, to produce energy conversion of head and flows through pump cylinder from drainage tube bending eduction. Pump through the coupling (rigid) and aligning intermediate shaft coupling. Under the support of motor rotor bearing all down the axial force. Intermediate bearing and the motor shaft coupling with flexible coupling.

The axial impeller (wheel body) with blades, according to whether the blade can be adjustable pump performance parameters change, hoping the following three points:

Fixed axial-flow-impeller (wheel body) and blade for the whole structure, the leaves can not be adjusted;

Half a regulation axial-flow impeller blades-(wheel body) and blade for composite structures can only downtime, dismantling the leaf blade adjustment placed Angle (such as 0 °, ± 2 °, ± 4 °, ± 6 °, ± 8 °), the Angle of control is the cascade;

Adjust the blade-through a set of reliable regulation institutions (mechanical or hydraulic pressure), pump can be used in the operation manual and electric, computer control methods was Angle of the blade stepless adjustment.

Second, inlet and wet pit, dry pit installation

Axial-flow (especially large pump) to the inlet type and size requirement is very strict, it directly influence the performance of the pump (such as pump efficiency, cavitation performance, etc.), so must through the formal design (design institute design).

Wet pit installation, refers to the pump all or part of the submerged in pumping fluid, pump partly submerged in inhaled pool;

Dry pit installation, refers to the pump for all surrounded by air, the water flow in the form of cubits pump.

 



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