Method for Determining Flow Deflection Parameters of Outlet Channel of Inclined Axial Flow Pump
A parameter determination, axial-flow pump technology, applied in non-variable-capacity pumps, components of pumping devices for elastic fluids, pumps, etc. Avoid difficulty and optimize the effect of design
Active Publication Date: 2020-03-17
CHINA AGRI UNIV +1
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Problems solved by technology
[0006] The present invention aims to solve at least one of the technical problems existing in the prior art or the related art: the on-site measurement of the deflection parameters of the outlet channel of the inclined axial flow pump is difficult, costly, and low-precision
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[0062] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.
[0063] So far, there is no report on the quantitative description of the circulation change, velocity change and flow change of the outlet channel caused by the flow deflection of the inclined axial flow pump. To solve this problem, the present invention provides a simple and efficient determination method. The present invention systematically studies the internal flow state of the inclined axial flow pump, and quantitatively gives the flow channel velocity and flow deflection of each part of the outlet flow channel. The determination method of the parameters provides a basis for the optimal design and efficient and stable operation of the oblique axial flow pump.
[0064...
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The invention relates to the field of flow calculation, and provides a determining method for flow and deflection parameters of a water outlet runner of an inclined type axial-flow pump. The determining method comprises the following steps: determining parameters of a pump section and the water outlet runner of the inclined type axial-flow pump, obtaining impeller outlet equivalent circular rectordensity Gamma d, water outlet runner flow and deflection intensity Ds, and obtaining a water outlet runner inlet circular rector of the inclined type axial-flow pump, average overflow speed of a section channel specified by the pump section and the water outlet runner, and one or more of a defection-flow ratio and flow at the two sides of a separating pier in the water outlet runner according tothe impeller outlet equivalent circular rector density Gamma d and the water outlet runner flow and deflection intensity Ds. The determining method for flow and deflection parameters of the water outlet runner of the inclined type axial-flow pump provided by the invention is simple and efficient, and is used for guiding optimized design, working condition control as well as safe and stable operation of the inclined type axial0flow pump.
Description
technical field [0001] The invention relates to the field of flow calculation, in particular to a method for determining flow deflection parameters of an oblique axial flow pump outlet channel. Background technique [0002] Inclined axial flow pump, often referred to as inclined axis pump, is a low-lift, high-flow water pump used in the field of irrigation and drainage projects in my country. Usually, the diameter of the impeller is greater than 3 meters and the flow rate is greater than 30 cubic meters per second. The main advantages of the inclined axial flow pump are small hydraulic loss in the inlet channel, uniform flow at the impeller inlet, and high efficiency of the pump section. [0003] However, the double curved section at the front of the outlet flow channel of the inclined axial flow pump will cause the axial flow pump guide vane outlet circulation to present a nonlinear distribution in the radial direction, and a high intensity in the same direction as the impe...
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IPC IPC(8): F04D29/18F04D29/52G06F30/17
Inventor 王福军王超越谢丽华汤远张树存汪宝罗苏胜利赵浩儒潘利国戴琪悦
Owner CHINA AGRI UNIV