Space guide blade with auxiliary vanes

Abstract

The invention discloses a space guide blade which is used for a deep well centrifugal pump or other forms of multi-level centrifugal pumps and provided with auxiliary vanes. The auxiliary vanes are arranged in the middle of all runners of the space guide blade, the change rule of the auxiliary vanes in the axial direction conforms to the streamline shape of vanes of the space guide blade, the thickness of the auxiliary vanes is smaller than that of the vanes of the space guide blade, and the auxiliary vanes occupy small space. The space guide blade is simple in structure, the flowing form that the middle of the space guide blade is attached to a lower cover plate area of the space guide blade can be effectively improved, the probability of vortex and secondary flow is reduced, the hydraulic loss in the runners of the space guide blade can be reduced, and the overflowing efficiency of the space guide blade is improved.

Description

Technical field [0001] The space guide vane involved in the invention is a key hydraulic component of a multi-stage centrifugal pump and belongs to the field of hydraulic machinery. Background technique [0002] The space guide vane, also known as the guide casing, is located behind the impeller and together with the impeller constitutes the flow-passing part of the pump. Space guide vanes are widely used in deep well centrifugal pumps and guide vane mixed flow pumps. The main function of the space guide vane is to collect the liquid at the outlet of the impeller and transport it to the outlet or the suction port of the next stage impeller; reduce the velocity of the liquid flow and convert the velocity energy into pressure energy; eliminate the velocity circulation of the liquid flow as much as possible . Therefore, the space guide vane is an important speed-energy conversion device, and its design has a major impact on the performance of the pump. Some data show that the...

AI Technical Summary

Problems solved by technology

[0003] Relevant studies have shown that the internal flow of the space guide vane is very complex, and there are phenomena such as flow separation, secondary flow, and vortex, resulting in large hydraulic losses

While these flow phenomena reduce the pump efficiency, they will also aggravate the flow-induced vibration and noise of the pump body, and lead to a decrease in the stability of the pump operation.

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