Novel horizontal type multilevel vortex pump

Abstract

The invention relates to a horizontal type multilevel vortex pump which comprises a pump body, a rotor part connected with three groups of vortex pump impellers, and two bearing bodies, wherein the two bearing bodies are connected onto two ends of the pump body respectively; the rotor part is rotatably arranged in the pump body in a penetrating manner; two ends of the rotor part are connected with the bearing bodies respectively; a water inlet and a water outlet are formed in the outer sides of the pump body respectively; a water inlet section chamber, a middle section chamber and a water outlet section chamber communicated with each other are sequentially arranged in the middle of the pump body; the three groups of vortex pump impellers are positioned in the water inlet section chamber, the middle section chamber and the water outlet section chamber respectively; the water inlet section chamber is communicated with the water inlet; the water outlet section chamber is communicated with the water outlet; the water inlet section chamber and the middle section chamber are vortex pump type chambers; the vortex pump impellers are provided with corresponding back blades. The horizontal type multilevel vortex pump is not provided with a sealing ring, so that the horizontal type multilevel vortex pump has no sealing operation interval and can avoid the problem that the performance of the pump is declined due to increased operation interval of the pump body and the impellers after abrasion.

Description

technical field [0001] The invention relates to a horizontal multistage pump, and proposes to manufacture the horizontal multistage swirl pump by using the principle of the swirl pump. Background technique [0002] The existing horizontal multi-stage pump products mainly adopt centrifugal pump structure. The running gaps of the high and low pressure chambers in the pump, that is, the water inlet section, the middle section and the water outlet section, and the matching gap between them and the impeller are sealed with sealing rings; The impellers of multi-stage centrifugal pumps will add up to generate a large axial force. Therefore, it is necessary to set a balance plate to balance the axial force. It has the following disadvantages: to produce the same head, the diameter of the impeller of the centrifugal pump is about 20% larger than that of the swirl pump , resulting in an increase in the volume of the pump; in an environment with variable flow and constant pressure flui...

AI Technical Summary

Problems solved by technology

[0002] The existing horizontal multi-stage pump products mainly adopt centrifugal pump structure. The running gaps of the high and low pressure chambers in the pump, that is, the water inlet section, the middle section and the water outlet section, and the matching gap between them and the impeller are sealed with sealing rings; The impellers of multi-stage centrifugal pumps will add up to generate a large axial force. Therefore, it is necessary to set a balance plate to balance the axial force. It has the following disadvantages: to produce the same head, the diameter of the impeller of the centrifugal pump is about 20% larger than that of the swirl pump , resulting in an increase in the volume of the pump; in an environment with variable flow and constant pressure fluid delivery requirements, the head of the centrifugal pump changes with the flow rate, which will not meet the use requirements

After long-term operation, the pump seal ring and guide vane sleeve will wear quickly, resulting in a decline in pump performance; the balance plate and balance ring are a pair of high-speed rotating friction pairs, which wear out quickly during operation and need to be replaced frequently

Due to the axial series movement generated during the operation of the balance disc and the rotor will have a large axial displacement after rapid wear and tear, the shaft seal of this type of multi-stage centrifugal pump should not use a sealed structure, and only soft packing can be used. , resulting in large pump leakage and reduced efficiency

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