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Centrifugal pump with greatly distorted blades

A technology of centrifugal pumps and blades, which is applied to parts, pumps, pump elements, etc. of pumping devices for elastic fluids, and can solve the problems of blade distortion, energy loss, and efficiency reduction of centrifugal pumps, etc.

Inactive Publication Date: 2013-12-11
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the shortcomings of existing centrifugal pumps in terms of hydraulic performance improvement, the present invention provides a centrifugal pump with extremely twisted blades. The problem of reduced efficiency of centrifugal pumps

Method used

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  • Centrifugal pump with greatly distorted blades
  • Centrifugal pump with greatly distorted blades

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Embodiment Construction

[0007] figure 1 Including impeller blade 1, rear cover plate 2, blade rear cover streamline start A, blade front cover streamline start B, and blade front cover streamline end C, it is characterized in that: impeller blade 1 utilizes Bezier (bezier) The curve control presents a greatly distorted shape. The Bezier curve is defined with four points: the starting point, the anchor point, and two separated intermediate points. Sliding the two intermediate points will cause the shape of the Bezier curve to change, reaching The maximum twist value allowed for the blade angle. The present invention designs a greatly twisted impeller blade. The twist curvature range of the blade inlet side curve AB is 90°~140°, and the twist curvature of the blade front cover streamline BC is 110°~150°. The control of the Bezier curve realizes the greatly distorted shape of the blade, so that the blade streamline reaches the optimum value in line with the law of fluid motion, which not only avoids t...

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Abstract

The invention relates to fluid machine equipment, particularly a centrifugal pump with greatly distorted blades, which comprises impeller blades, a back cover plate, a blade back cover streamline start end, a blade front cover streamline start end and a blade front cover streamline tail end. The invention is characterized in that the impeller blades are controlled by a bezier curve and are in a greatly distorted shape; the distortion curvature of the blade inlet edge curve AB is 90-140 degrees; and the maximum distortion curvature of the blade front cover streamline BC is 110-150 degrees. The invention has the advantage that the bezier curve is utilized to control the blade profile to be in a greatly distorted shape, so that the blade streamline achieves the optimal value conforming to the fluid motion law, thereby avoiding the problems of reflux loss and vibration noise caused by balance holes, reducing the on-way resistance loss, and highlighting the hydraulic performance of the centrifugal pump.

Description

technical field [0001] The invention relates to fluid mechanical equipment, in particular to a centrifugal pump with extremely twisted blades, which is mainly used in large coal-fired enterprises such as thermal power plants, chemical plants, steel plants, paper mills, and cement plants. Background technique [0002] At present, the domestic centrifugal pump industry mostly uses impellers with balance holes (such as figure 2 ), the impeller of this structure has two disadvantages, one is that the backflow of the balance hole will affect the flow state of the impeller inlet, resulting in vibration and noise, and the other is that the energy loss caused by the backflow will affect the hydraulic performance of the pump, and its balance The effect is not significant. In addition, the impeller of the centrifugal pump with the back blade of the impeller will reduce the efficiency of the pump, thereby affecting the delivery performance of the centrifugal pump. From the perspective...

Claims

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Application Information

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IPC IPC(8): F04D29/24
Inventor 刘建瑞何小可刘博文
Owner JIANGSU UNIV
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