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Design method for bell mouth of water inlet passage of bidirectional pump station

A technology of water inlet flow channel and design method, which is applied in special data processing applications, geometric CAD and other directions, can solve the problems of unsmooth profile transition and difficult parametric design, achieve smooth profile transition, improve design efficiency, and increase lift and efficiency effects

Active Publication Date: 2021-11-26
JIANGSU UNIV
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  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to provide a method for designing the bell mouth of the inlet channel of a two-way pumping station to solve the above-mentioned problems in the prior art, and to make up for the fact that the current hyperbolic and elliptical design methods are not smooth, and are not easy to parametric design Shortcomings

Method used

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  • Design method for bell mouth of water inlet passage of bidirectional pump station
  • Design method for bell mouth of water inlet passage of bidirectional pump station
  • Design method for bell mouth of water inlet passage of bidirectional pump station

Examples

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Embodiment 1

[0055] Such as figure 1 Shown is the structural schematic diagram of the water inlet channel of the bidirectional pumping station of the embodiment, and the main parameters are:

[0056] α = 10°, D 0 =292mm, D 1 =466mm

[0057] h 0 =156mm, h 2 =198mm, H=460mm

[0058] Determine the line combination:

[0059] Such as figure 2 Shown, bell mouth (1) type line is made up of parabola (6) and two first straight lines (5) and (7), and parabola (6) is positioned at the middle of first straight line (5) and (7), And are respectively tangent to the first straight line (5) and the second straight line (7);

[0060] Establish a coordinate system and list equations:

[0061] Such as figure 2 As shown, a Cartesian coordinate system is established with the center point of the outlet of the flow channel as the center of the circle, the horizontal direction as the X axis, and the vertical downward as the Y axis.

[0062] Parabola (6) is a quadratic parabola, and the general form o...

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Abstract

The invention discloses a design method for a bell mouth of a water inlet passage of a bidirectional pump station, which comprises the following steps of: segmenting the bell mouth to obtain parameters of each part of the bell mouth, establishing an equation of a parabola by the parameters, and solving the equation to obtain a specific line type of the parabola, namely, obtaining a design structure of the invention. The method overcomes the defects that according to an existing hyperbola and ellipse design method, molded line transition is not smooth, and parameterization design is not easy to achieve.

Description

technical field [0001] The invention relates to the technical field of water conservancy engineering, in particular to a method for designing a bell mouth of a bidirectional pumping station inlet flow channel. Background technique [0002] Pumping stations are important large-scale water diversion projects, which play an important role in solving regional water supply shortages, agricultural irrigation and drainage, and urban flood control and drainage. As a special low-head pumping station system with two-way drainage function, the vertical bidirectional pumping station is widely used in irrigation and drainage in my country. However, there are two outstanding problems in the two-way pumping stations that have been completed in our country: one is the low operating efficiency of the pumping station, and the other is the strong vibration of the unit during operation. The main reason for the above two is that there are defects in the design of the water inlet channel, which ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/13
CPCG06F30/13
Inventor 袁建平陆荣李彦军付燕霞
Owner JIANGSU UNIV
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