Centrifugal pump with simple structure

Abstract

The invention relates to a centrifugal pump with a simple structure. The centrifugal pump comprises a horizontal pump shaft, wherein a single-suction impeller and a balance drum are arranged on the pump shaft, the balance drum is located on the water outlet side of the single-suction impeller, mechanical seals are arranged between both ends of a pump case and the pump shaft, and a spitting high-pressure area which communicates with the water outlet side of the single-suction impeller and a suction low-pressure area which communicates with the water inlet side of the single-suction impeller areformed in the pump case; a first sealing area is formed between a part, in which the suction low-pressure area is formed and which is far from the water inlet side of the single-suction impeller, ofthe pump case and the mechanical seal on the corresponding side, and a second sealing area is formed between the balance drum and the mechanical seal on the water outlet side of the single-suction impeller; the leakproof surfaces of the two mechanical seals are located in the corresponding sealing areas; the first sealing area communicates with the second sealing area through an external balance pipe; and the second sealing area communicates with the spitting high-pressure area, and the first sealing area communicates with the suction low-pressure area. According to the centrifugal pump, the balance pipe and a mechanical seal flushing pipeline are used together, so that the structure is simplified, the fluid pressure is reasonably used, and the overall efficiency of the pump is improved.

Description

technical field [0001] The invention belongs to the technical field of non-variable pumps, and in particular relates to a simplified structure centrifugal pump. Background technique [0002] A centrifugal pump is a pump that delivers fluid by the centrifugal force generated when the impeller rotates. The fluid is sucked in from the water inlet and pumped out from the water outlet. When working, the pump shaft drives the impeller in the pump casing to rotate at a high speed, and the fluid in the pump casing is thrown to the outer edge of the impeller under the action of centrifugal force, flows into the pressure water pipeline through the discharge channel of the pump casing, and is pumped out. At the center of the impeller, The negative pressure area is formed due to the fluid being thrown out, and the external fluid is sucked from the water inlet under the pressure, and flows continuously to the negative pressure area of ​​the impeller axis through the suction channel, that...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the above-mentioned deficiencies in the prior art, the technical problem to be solved by the present invention is to provide a centrifugal pump with a simplified structure, which avoids the problem of relatively complicated structure caused by connecting the balance pipe and the mechanical seal flushing pipeline respectively on the centrifugal pump, and achieves a reasonable utilization of the fluid. Pressure to reduce fluid energy loss, the effect of a more streamlined structure

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