A kind of multistage centrifugal pump guide vane and its processing method

Abstract

The invention provides a guide vane of a multistage centrifugal pump, the guide vane is a curved guide vane, and the curved guide vane is combined with the middle section to form a flow passage for fluid passing between the two. The curved guide vane includes a forward guide vane, a rear cover plate, an anti guide vane, and a vaneless bend formed by flowing from the forward guide vane to the reverse guide vane. The forward guide vane and the reverse guide vane are respectively arranged on the The front and back of the rear cover form an integral body with the rear cover, anti-rotation pin holes are arranged on the anti-rotation vane blades in the axial direction, and anti-rotation pins are arranged in the anti-rotation pin holes to prevent the rotor from driving the guide vanes to rotate . The invention also provides a processing method for guide vanes of multistage centrifugal pumps. The invention provides a guide vane of a multistage centrifugal pump and a processing method thereof, which can reduce the deviation of the hydraulic performance of the whole pump and can precisely control the hydraulic performance.

Description

technical field [0001] The invention relates to the technical field of centrifugal pump guide vanes, in particular to a multistage centrifugal pump guide vane and a processing method thereof. Background technique [0002] A multi-stage centrifugal pump is a centrifugal pump in which the final stage consisting of the first stage with better cavitation performance, several intermediate stages with the same performance, and the intermediate stage without anti-guide vanes is connected in series on a pump shaft. Since the fluid passes through the multi-stage centrifugal pump from the first stage, the middle stage to the final stage, and the first stage passes through in series, the performance deviation of each stage is accumulated step by step, which will eventually cause a large performance deviation of the whole pump. This is mainly reflected in two aspects. In terms of structural design, the dimensional tolerances of each stage accumulate, and in terms of hydraulic design, th...

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Problems solved by technology

However, since this radial guide vane can only be produced by integral casting, it cannot be integrally milled, and the defects and size deviations caused by integral casting will cause large deviations in the hydraulic performance of the multi-stage centrifugal pump, which is still not possible. Accurate control of hydraulic performance

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