A Design Method for Elbow Inlet Channel Used in Pumping Station

Abstract

The invention belongs to the application field of pump stations and particularly relates to a design method of an elbow inlet passage for a pump station. By the adoption of the design method, a design formula of main geometric parameters of the elbow inlet passage for the pump station involves the height L from the center of an impeller to a bottom plate of the inlet passage, the height M of an inlet of the inlet passage, a proportionality coefficient K, the length X from the inlet of the inlet passage to the axis of a pump, the width B of the inlet section of the inlet passage, the extrinsic curvature radius R of the bent section of the inlet passage, the intrinsic curvature radius r of the bent section of the inlet passage, the top convergent angle alpha of the inlet section of the inlet passage, the lower sideline dip angle beta of the inlet section of the inlet passage, the inlet height h of the bent section of the inlet passage, the height l of the outlet section of the inlet passage and the like. The operation stability and high efficiency of the pump station can be improved, and meanwhile the service life of the pump and the repair cycle of the pump station are prolonged. Moreover, the design method has good economic benefits, can be applied in combination with a computer more easily, and makes parametrization design become possible.

Description

technical field [0001] The invention belongs to the application field of pumping stations, and in particular relates to a design method of an elbow-shaped water inlet channel. Background technique [0002] Usually, in order to reduce the amount of construction in large pumping stations, the water inlet pool and the suction pipe are generally combined into one, which is the water inlet flow channel, and at the same time, it also makes the motor have a relatively good working environment. Generally, vertical pumps are used in large pumping stations, but due to the relatively large axial size of vertical pumps, the height of the pump room and the depth of the bottom plate of the pump room should be reduced as much as possible. However, too low pump room height and floor depth will affect the water flow state, and may even cause cavitation and vibration of the pump, and will reduce the operating efficiency of the pump station and reduce the economic benefits of the pump station....

AI Technical Summary

Problems solved by technology

However, it does not give the design formula for the taper angle at the top of the inlet section of the elbow-shaped inlet channel. Therefore, its design scheme is not perfect, and it has a great impact on the inlet flow pattern of the inlet channel to a certain extent.

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