Double-inlet large-flow multistage centrifugal pump

Abstract

The invention discloses a double-inlet large-flow multistage centrifugal pump which has the structural characteristics that a pump shaft is supported by a bearing body component, a discharge double suction impeller and a discharge section are installed in the middle part of the pump shaft, guide vanes, impellers, middle sections, first-stage double suction impellers and suction inlet components are respectively installed on both sides of the pump shaft, and all components are tightly connected into a whole be means of bolts. The entire water pump is symmetrically arranged with the water outlet of the discharge section of the pump as a center, the automatic balancing of axial force is realized, the abrasion and the damages of parts and components are reduced, the service life of the pump is prolonged, and the maintenance cost of user equipment is reduced. The flow of the pump is doubled by adopting the double suction inlet structure and the double suction impeller, and the requirement for large flow of the user is realized. The pump has a few parts, simple structure, low cost, long service life, large flow, high efficiency and smooth and reliable operating state.

Description

1. Technical field [0001] The invention relates to a multi-stage centrifugal pump, in particular to a double-inlet large-flow multi-stage centrifugal pump. 2. Background technology [0002] At present, there are many types of pumps, which can be divided into vane pumps, positive displacement pumps and other types of pumps according to their working principles. Centrifugal pumps are a type of vane pumps, which are divided into single-stage centrifugal pumps and multi-stage centrifugal pumps. In order to increase the lift and flow, multi-stage centrifugal pumps are used more widely. The existing multistage centrifugal pumps are all single-suction centrifugal pumps, and their structure is that there is only one inlet, and all the impellers are arranged one by one in the same direction and installed on a pump shaft. The pump will generate axial force during use. , The balance of the axial force is usually balanced by a balance disc or a balance drum, but the axial force cannot ...

AI Technical Summary

Problems solved by technology

The existing multistage centrifugal pumps are all single-suction centrifugal pumps, and their structure is that there is only one inlet, and all the impellers are arranged one by one in the same direction and installed on a pump shaft. The pump will generate axial force during use. , the balance of axial force is usually balanced by a balance disc or a balance drum, but the axial force cannot be completely eliminated at all, and the residual axial force is borne by the bearing

During the use of the pump, the bearing bears a large axial force and is easily damaged. The wear of the balance mechanism will also cause the wear of other rotor parts, thus affecting the normal service life of the pump. Frequent replacement of worn parts also increases the user's equipment maintenance costs.

In addition, the single-suction multi-stage centrifugal pump with one inlet limits the flow rate of the pump and cannot achieve a large flow rate

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