Double volute structure of a centrifugal pump

Abstract

The invention relates to the field of fluid machinery, in particular to a double-volute structure of a centrifugal pump. The double-volute structure comprises volutes, a vortex chamber arranged in thevolutes and a diffusing pipe arranged at outlets of the volutes. A partition tongue is arranged at the contact position of the volutes and the diffusing pipe. A partition plate is arranged in the volutes. The vortex chamber is partitioned into two volute channels through the partition plate. The head end of the partition plate is a sharp corner, and the tail edge of the partition plate is a sharpcorner. The disadvantage that due to the partition tongue, pressure distribution of the front ends of two flowing channels has the large difference, and consequently the radial force borne by an impeller is increased is eliminated through the sharp corner of the head end of the partition plate, the phenomenon that the flowing loss of the tail edge of a partition plate of a traditional double-volute structure is serious, and thus flowing separating occurs is overcome through the sharp corner of the tail edge of the partition plate, the lift of a fluid is increased, and thus the efficiency is improved.

Description

technical field [0001] The invention relates to the field of fluid machinery, in particular to a double volute structure applied to a centrifugal pump. Background technique [0002] Most of the volute forms currently studied are conventional single volutes. Since the double volute structure can make the internal flow of the pump more symmetrical, the radial force is greatly weakened compared with the single volute structure, and the operation of the pump is more stable, so the application is more widely. [0003] The double volute form is symmetrically arranged by two separate flow passages, and the sum of the two symmetrical throat areas is equal to the throat area of ​​the single volute. The double volute has the following characteristics, the radial force is basically balanced, and the pump runs smoothly; the efficiency of the double volute pump is similar to that of the single volute, and it is 1% to 1.5% lower than the single volute in the optimal working condition. T...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a double volute structure of a centrifugal pump to overcome the problem of large radial force on the double volute impeller in the prior art

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