Parameterized design method, device and equipment of elbow-shaped water inlet channel and storage medium

Abstract

Embodiments of the present application relate to a kind of elbow-shaped water inlet flow passage parameterization design method, device, equipment and storage medium.The method comprises: according to the preset three-dimensional structure of elbow-shaped water inlet flow passage, four-order Bezier curve is used to fit flow passage three-dimensional space guide line;Wherein, the three-dimensional space guide line is defined by five control points;Five control points are set in the symmetry plane of the elbow-shaped water inlet flow passage, and meet the preset constraint condition;Along the flow passage three-dimensional space guide line, feature cross section is placed at multiple preset positions;Wherein, the feature cross section is perpendicular to the flow passage three-dimensional space guide line, cross section area is continuously contracted along flow direction, and cross section shape gradually changes from the rectangle or rounded rectangle of the inlet of the elbow-shaped water inlet flow passage to the circularity of outlet, and the corner radius gradually increases along flow direction;Based on the feature cross section, continuous smooth flow passage side wall is generated, and three-dimensional flow passage model is obtained.The embodiment of the present application can control flow passage curvature variation, facilitate parameterization optimization.

Description

Technical Field

[0001] This invention relates to the field of water pump design technology, and in particular to a parametric design method, apparatus, equipment and storage medium for elbow-shaped inlet channels. Background Technology

[0002] The function of the inlet channel is to smoothly guide water from the suction tank to the pump inlet. Inlet channels are classified by their shape into elbow-shaped, bell-shaped (volute-type), and scoop-shaped channels, among others. Elbow-shaped channels offer smooth flow and high efficiency. A well-designed elbow shape guides the water flow during a 90° turn, ensuring a uniform increase in velocity and a gentle transition from horizontal to vertical direction. This significantly reduces eddies and flow separation, thereby minimizing hydraulic losses and improving pump efficiency.

[0003] In existing technologies, traditional elbow-shaped inlet channel designs often employ combinations of various curves such as circular arcs and elliptical arcs, designing shapes according to known cross-sectional variation patterns. Dimensions are primarily based on empirical formulas, defining only a subset of parameters. The geometric shape is as follows: Figure 1 As shown.

[0004] Current technologies use simple curve combinations such as circular arcs and elliptical arcs, resulting in poor curve continuity and discontinuous curvature at the junctions of different curve segments. This leads to unstable flow field quality and a tendency to generate flow separation and eddies. The design freedom is low, and adjusting a single parameter affects the overall shape, making optimization difficult. The design quality largely depends on the designer's experience and lacks a systematic parameter control system. The optimization cycle is long, and each modification requires redrawing, resulting in low efficiency of CFD analysis. Summary of the Invention

[0005] The present invention aims to provide a design method for elbow-shaped inlet channels that has good curvature continuity, is easy to optimize, and has excellent hydraulic performance.

[0006] In a first aspect, embodiments of the present invention provide a parametric design method for an elbow-shaped inlet channel, comprising: Based on the preset three-dimensional structure of the elbow-shaped water inlet channel, a fourth-order Bezier curve is used to fit the three-dimensional spatial guide line of the channel; wherein, the three-dimensional spatial guide line is defined by five control points; The five control points are set in the symmetrical plane of the elbow-shaped water inlet channel and satisfy the preset constraint conditions. Feature sections are placed at multiple preset positions along the three-dimensional spatial guide line of the flow channel; wherein, the feature sections are perpendicular to the three-dimensional spatial guide line of the flow channel, the cross-sectional area continuously shrinks along the flow direction, and the cross-sectional shape gradually changes from a rectangle or rounded rectangle at the inlet of the elbow-shaped water inlet to a circle at the outlet, with the radius of the rounded corners gradually increasing along the flow direction. Based on the aforementioned characteristic cross-section, a continuous and smooth flow channel sidewall is generated, resulting in a three-dimensional flow channel model.

[0007] Secondly, embodiments of the present invention provide a parametric design device for an elbow-shaped water inlet channel, comprising: The guide line determination module is used to fit the three-dimensional spatial guide line of the flow channel using a fourth-order Bézier curve based on the preset three-dimensional structure of the elbow-shaped water inlet channel; wherein, the three-dimensional spatial guide line is defined by five control points; The control point setting module is used to set the five control points in the symmetrical plane of the elbow-shaped water inlet channel and satisfy the preset constraint conditions. A feature section placement module is used to place feature sections at multiple preset positions along the three-dimensional spatial guide line of the flow channel; wherein, the feature section is perpendicular to the three-dimensional spatial guide line of the flow channel, the cross-sectional area continuously shrinks along the flow direction, and the cross-sectional shape gradually changes from a rectangle or rounded rectangle at the inlet of the elbow-shaped water inlet to a circle at the outlet, with the rounded radius gradually increasing along the flow direction; The three-dimensional flow channel model determination module is used to generate continuous and smooth flow channel sidewalls based on the characteristic cross-section to obtain a three-dimensional flow channel model.

[0008] Thirdly, embodiments of the present invention provide an electronic device, comprising: One or more processors; Memory, used to store one or more programs; When the one or more programs are executed by the one or more processors, the one or more processors implement the parameterized design method for elbow-shaped inlet channels provided in any embodiment of the present invention.

[0009] Fourthly, embodiments of the present invention provide a storage medium containing computer-executable instructions, which, when executed by a computer processor, are used to perform the elbow-shaped inlet flow channel parametric design method provided in any embodiment of the present invention.

[0010] This invention provides a parametric design method, apparatus, device, and storage medium for elbow-shaped inlet channels. By decomposing the complex three-dimensional entity of the elbow-shaped channel into a parametric modeling system of guide lines and characteristic sections, and by using fourth-order Bézier curves to achieve precise mathematical control of the channel center path, it solves the problems of unstable flow field quality and difficulty in design optimization in channel design. This invention realizes an elbow-shaped channel design method that can accurately control the curvature change of the channel and facilitate parametric optimization. Attached Figure Description

[0011] Figure 1 A schematic diagram of the parameter design of the elbow-shaped water inlet channel in the prior art; Figure 2 A flowchart illustrating a parametric design method for an elbow-shaped inlet channel provided in an embodiment of the present invention; Figure 3 A schematic diagram of the structure of a parametric design device for an elbow-shaped water inlet channel provided in an embodiment of the present invention; Figure 4 A schematic diagram of the X-axis and Z-axis of the elbow-shaped water inlet channel provided in an embodiment of the present invention; Figure 5 A schematic diagram of a three-dimensional spatial guide line provided in an embodiment of the present invention; Figure 6 A schematic diagram of the placement feature section provided in an embodiment of the present invention; Figure 7 A schematic diagram of a three-dimensional model of an elbow-shaped water inlet channel provided in an embodiment of the present invention; Figure 8 Vector diagram of the inlet section flow field for existing elbow-shaped inlet channel design; Figure 9 This is a vector diagram of the flow field in the inlet section of the elbow-shaped inlet channel design according to an embodiment of the present invention. Figure 10 This is a schematic diagram of the structure of an electronic device provided in an embodiment of the present invention. Detailed Implementation

[0012] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0013] Figure 2 This is a flowchart illustrating a parametric design method for an elbow-shaped inlet channel provided by an embodiment of the present invention. This embodiment is applicable to the case of elbow-shaped inlet channels in water pumps. The method can be executed by a parametric design device for elbow-shaped inlet channels, which can be implemented by hardware and / or software and is generally integrated into electronic devices, such as computer equipment. The method specifically includes: Step 110: Based on the preset three-dimensional structure of the elbow-shaped water inlet channel, use a fourth-order Bezier curve to fit the three-dimensional spatial guide line of the channel. The pre-defined three-dimensional structure of the elbow-shaped inlet channel mainly includes the opening directions of the inlet and outlet, the cross-sectional shapes of the inlet and outlet, the curvature of the elbow-shaped channel, the length of the inlet section, and the impeller center height. These three-dimensional structures are determined according to the design requirements of the elbow-shaped inlet channel, and it is understandable that the parameter values ​​of these three-dimensional structures have corresponding ranges. The continuity of the third derivative provided by the fourth-order Bézier curve ensures the smoothness of the curvature of the channel centerline. The three-dimensional spatial guide line of the channel is the centerline of the internal flow space of the elbow-shaped inlet channel. The three-dimensional spatial guide line is defined by five control points, which are set sequentially from the inlet direction of the elbow-shaped inlet channel. The three-dimensional spatial guide line of the channel is defined by these control points.

[0014] Step 120: Set the five control points in the symmetrical plane of the elbow-shaped water inlet channel and satisfy the preset constraint conditions; To facilitate the determination of the three-dimensional model of the elbow-shaped inlet channel using coordinate parameters, a three-dimensional spatial coordinate system can be established. In one implementation, the three-dimensional spatial coordinate system is a Cartesian coordinate system, with the X-axis and Z-axis established within the plane of symmetry of the elbow-shaped inlet channel, such as... Figure 4 As shown, the Y-axis runs along the width of the elbow-shaped inlet channel. To ensure that the three-dimensional guide line of the channel, defined by five control points, conforms to the preset three-dimensional structure of the elbow-shaped inlet channel, preset constraints are set for the five control points. These preset constraints can be geometric constraints related to the pump mounting surface, pump axis, inlet section length, impeller center height, and elbow bending shape.

[0015] Step 130: Place feature sections at multiple preset positions along the three-dimensional spatial guide line of the flow channel; The characteristic cross-section is perpendicular to the three-dimensional guide line of the flow channel, and the cross-sectional area continuously contracts along the flow direction, with a preferred contraction angle. The cross-sectional shape gradually changes from a rectangular or rounded rectangle at the inlet of the elbow-shaped inlet channel to a circular shape at the outlet, with the radius of the rounded corners gradually increasing along the flow direction. The shapes of the inlet and outlet of the elbow-shaped inlet channel are predetermined and contained within a pre-defined three-dimensional structure. Using a fourth-order Bézier curve as a guide line, multiple feature sections are sequentially laid out at several pre-defined positions along the guide line, ensuring that each feature section remains perpendicular to the guide line throughout the laying process. The pre-defined positions can be selected based on the length of the guide line in three-dimensional space.

[0016] Step 140: Generate continuous and smooth flow channel sidewalls based on the feature cross-section to obtain a three-dimensional flow channel model.

[0017] In this process, after lofting multiple feature sections, the cross-sectional shape of the feature sections is automatically interpolated to achieve a smooth transition from an inlet rectangle or rounded rectangle to an outlet circle, ultimately generating a continuous and smooth elbow-shaped water inlet channel 3D model.

[0018] Existing elbow-shaped inlet channel designs employ combinations of various curves, such as circular arcs and elliptical arcs, and define certain parameters, such as... Figure 1 In the middle, the cone angle of the conical segment : Flow channel length : Flow channel inlet width : If the inlet velocity of the control channel is controlled within 0.6~1.0 m / s, the inlet height can be adjusted. Angle of inclination with the top edge Bottom line inclination angle : , , , , , The impact on the flow field at the outlet of the flow channel is not significant, and its value can be more considered in terms of the hydraulic layout requirements of the pumping station.

[0019] The technical solution of this application embodiment mainly involves decomposing the complex three-dimensional solid of the elbow-shaped flow channel into a parametric modeling system of guide lines and characteristic sections, and achieving precise mathematical control of the flow channel center path through fourth-order Bézier curves. This application embodiment has the following advantages: the continuity of the third derivative provided by the fourth-order Bézier curves ensures the smoothness of the flow channel centerline curvature. This geometrically eliminates the root cause of flow separation and vortex problems caused by abrupt curvature changes in traditional designs, resulting in a very uniform velocity distribution within the flow channel. This provides optimal inlet conditions for the impeller and significantly reduces hydraulic losses, directly improving pump operating efficiency. Parametric flow channel driving condenses the design intent into the coordinates of a few key control points, facilitating the establishment of optimization processes, making design quality controllable, predictable, and replicable, improving design efficiency, and shortening the R&D cycle.

[0020] Optionally, based on the preset three-dimensional structure of the elbow-shaped inlet channel, a fourth-order Bézier curve is used to fit the three-dimensional spatial guide line of the channel, including: Based on the three-dimensional shape of the elbow-shaped inlet channel, a fourth-order Bézier curve is used as the three-dimensional spatial guide line of the channel. Five control points are established along the inlet flow direction as follows: , , , and Define the three-dimensional guide lines of the flow channel: Wherein, B(t) represents the three-dimensional guide line of the flow channel. t is a unitless real number parameter used to uniquely determine a point on the curve. In the above formula... , , , and Both are expressed in coordinates within the XZ plane, equivalent to It can be expressed by two fractions respectively. Since the three-dimensional guide line of the flow channel lies in the XZ plane, the Y-axis coordinate of the three-dimensional guide line of the flow channel is 0. The fraction of the X-axis coordinate is: , The Z-axis coordinate fraction is: .

[0021] Optionally, the five control points are set within the symmetrical plane of the elbow-shaped inlet channel and satisfy preset constraints, including: All five control points are located within the plane of symmetry, which is the XZ plane. The control points use two-dimensional coordinates within the XZ plane. It is represented as such, and satisfies the following geometric constraints: The direction of flow is consistent with the inlet flow direction and coincides with the pump mounting surface. , , ,in, The outlet diameter of the elbow-shaped water inlet channel is [missing information]. Set the first parameter, optional. ; The direction is consistent with the direction of the water pump axis. , , ,in, The second parameter is optional. ; Among them, the length of the water intake section The setting is determined based on the total length of the pump body, and is usually half of the total length of the pump body. The height is the center height of the impeller; Control the elbow flexion shape. , , .

[0022] Optionally, feature sections are placed at multiple preset locations along the three-dimensional guide line of the flow channel, including: The positions of the five characteristic sections are defined by the t-value; Configure the parameter specifications of the feature section to create the corresponding feature section; wherein, the parameter specifications include the section shape, size, fillet radius and section area; The feature section is placed at a defined t value along the guide line.

[0023] Optionally, a continuous and smooth flow channel sidewall is generated based on the characteristic cross-section to obtain a three-dimensional flow channel model, including: Based on the characteristic cross-section, interpolation of the flow channel sidewall cross-section is performed to achieve a smooth transition from the inlet shape to the outlet shape, generating a continuous and smooth elbow-shaped inlet flow channel three-dimensional flow channel model.

[0024] In one specific embodiment, taking the elbow-shaped inlet channel design of a water pump as an example, the elbow-shaped inlet channel design is as follows: (1) Confirm the basic design parameters, outlet diameter mm, the flow channel type is a 90° elbow-shaped inlet flow channel, and the length of the inlet section is... The diameter is 90mm, and the impeller center height is 16mm (i.e., the center of the flow channel outlet). Z coordinate (16mm).

[0025] (2) Based on the confirmed design parameters, determine the coordinates of the control points for the fourth-order Bézier curve. For example, The origin of the coordinate system is taken as the center point of the flow channel inlet. (0,0); The center point of the flow channel outlet. The coordinates are (90, 16); As the tangent control point for the import, take ,Right now (24,0); As the exit tangent control point, take ,Right now The coordinates are (90, 46); As the main control point of the bend, it dominates the bend shape, and is taken as follows: The coordinates are (36, 56). The generated 3D spatial guide lines are as follows: Figure 5 As shown.

[0026] (3) The fourth-order Bézier curve is The location of the feature sections is defined using the t-value. Five feature sections are defined at t=0, t=0.3, t=0.6, t=0.8, and t=1 respectively. The section parameter specifications are shown in Table 1. The created feature sections are as follows: Figure 6 As shown.

[0027] Table 1

[0028] (4) Using the fourth-order Bézier curve as the guide line, create or select five feature sections in sequence according to Table 1 for lofting operations; set the lofting attributes to ensure that each section remains perpendicular to the guide line, and the section shape is automatically interpolated according to the software algorithm to achieve a smooth transition from the inlet rectangle to the outlet circle, finally generating a continuous and smooth elbow-shaped inlet flow channel three-dimensional model, such as Figure 7 As shown; the simulation comparison flow field vector diagram is as follows. Figure 8-9 As shown, Figure 8 This is a vector diagram of the inlet flow field in the traditional design method of existing technology. Figure 9The vector diagram of the inlet section of the design method in this embodiment of the invention is shown in Table 2. The hydraulic losses under different flow rates are shown in Table 2. It can be seen that the elbow-shaped flow channel designed in this embodiment of the invention has a more uniform flow field distribution and less hydraulic loss.

[0029] Table 2

[0030] Figure 3 This is a schematic diagram of the structure of a parametric design device for an elbow-shaped water inlet channel provided in an embodiment of the present invention, as shown below. Figure 3 As shown, the parametric design device for the elbow-shaped water inlet channel includes: The guide line determination module 310 is used to fit the three-dimensional spatial guide line of the flow channel using a fourth-order Bézier curve based on the preset three-dimensional structure of the elbow-shaped water inlet channel; wherein, the three-dimensional spatial guide line is defined by five control points; The control point setting module 320 is used to set the five control points in the symmetrical plane of the elbow-shaped water inlet channel and satisfy the preset constraint conditions. The feature section placement module 330 is used to place feature sections at multiple preset positions along the three-dimensional spatial guide line of the flow channel; wherein, the feature section is perpendicular to the three-dimensional spatial guide line of the flow channel, the cross-sectional area continuously shrinks along the flow direction, and the cross-sectional shape gradually changes from a rectangle or rounded rectangle at the inlet of the elbow-shaped water inlet to a circle at the outlet, with the rounded radius gradually increasing along the flow direction. The three-dimensional flow channel model determination module 340 is used to generate a continuous and smooth flow channel sidewall based on the feature cross section to obtain a three-dimensional flow channel model.

[0031] Optionally, the guide line determining module 310 is specifically used for: Based on the three-dimensional shape of the elbow-shaped inlet channel, a fourth-order Bézier curve is used as the three-dimensional spatial guide line of the channel, and five control points are sequentially set along the inlet flow direction. , , , and Define the three-dimensional guide lines of the flow channel: Wherein, B(t) represents the three-dimensional guide line of the flow channel. .

[0032] Optional, the control point setting module 320 is specifically used for: All five control points are located within the symmetry plane, which is the XZ plane. The control points use two-dimensional coordinates within the XZ plane. It is represented as such, and satisfies the following geometric constraints: The direction of flow is consistent with the inlet flow direction and coincides with the pump mounting surface. , , ,in, The outlet diameter of the elbow-shaped water inlet channel is [missing information]. Set the parameters for the first one; The direction is consistent with the direction of the water pump axis. , , ,in, Set parameters for the second one; Among them, the length of the water intake section The setting is determined based on the total length of the pump body. The height is the center height of the impeller; Control the elbow flexion shape. , , .

[0033] Optionally, the feature section placement module 330 is used for: The positions of the five characteristic sections are defined by the t-value; Configure the parameter specifications of the feature section to create the corresponding feature section; wherein, the parameter specifications include the section shape, size, fillet radius and section area; The feature section is placed at a defined t value along the guide line.

[0034] Optional, the three-dimensional flow channel model determination module 340 is used for: Based on the characteristic cross-section, interpolation of the flow channel sidewall cross-section is performed to achieve a smooth transition from the inlet shape to the outlet shape, generating a continuous and smooth elbow-shaped inlet flow channel three-dimensional flow channel model.

[0035] The elbow-shaped inlet flow channel parameterization design device provided in the embodiments of the present invention can execute the elbow-shaped inlet flow channel parameterization design method provided in any embodiment of the present invention, and has the corresponding functional modules and beneficial effects of the method execution.

[0036] Figure 10 This is a schematic diagram of the structure of an electronic device provided in Embodiment 3 of the present invention, as shown below. Figure 10 As shown, the electronic device includes a processor 410, a memory 420, an input device 430, and an output device 440; the number of processors 410 in the electronic device can be one or more. Figure 10 Taking a processor 410 as an example; the processor 410, memory 420, input device 430, and output device 440 in the electronic device can be connected via a bus or other means. Figure 10Taking the example of a connection between China and Israel via a bus.

[0037] The memory 420, as a computer-readable storage medium, can be used to store software programs, computer-executable programs, and modules, such as the program instructions / modules corresponding to the elbow-shaped inlet flow channel parameterization design method in this embodiment of the invention (e.g., modules in the elbow-shaped inlet flow channel parameterization design device). The processor 410 executes various functional applications and data processing of the electronic device by running the software programs, instructions, and modules stored in the memory 420, thereby realizing the above-mentioned elbow-shaped inlet flow channel parameterization design method.

[0038] The memory 420 may primarily include a program storage area and a data storage area. The program storage area may store the operating system and at least one application program required for a given function; the data storage area may store data created based on terminal usage. Furthermore, the memory 420 may include high-speed random access memory and non-volatile memory, such as at least one disk storage device, flash memory device, or other non-volatile solid-state storage device. In some instances, the memory 420 may further include memory remotely located relative to the processor 410, which can be connected to the electronic device via a network. Examples of such networks include, but are not limited to, the Internet, intranets, local area networks, mobile communication networks, and combinations thereof.

[0039] Input device 430 can be used to receive input digital or character information, and to generate key signal inputs related to user settings and function control of the electronic device. Output device 440 may include display devices such as a display screen.

[0040] This invention also provides a storage medium containing computer-executable instructions, which, when executed by a computer processor, are used to perform a parametric design method for an elbow-shaped inlet channel, including: Based on the preset three-dimensional structure of the elbow-shaped water inlet channel, a fourth-order Bezier curve is used to fit the three-dimensional spatial guide line of the channel; wherein, the three-dimensional spatial guide line is defined by five control points; The five control points are set in the symmetrical plane of the elbow-shaped water inlet channel and satisfy the preset constraint conditions. Feature sections are placed at multiple preset positions along the three-dimensional spatial guide line of the flow channel; wherein, the feature sections are perpendicular to the three-dimensional spatial guide line of the flow channel, the cross-sectional area continuously shrinks along the flow direction, and the cross-sectional shape gradually changes from a rectangle or rounded rectangle at the inlet of the elbow-shaped water inlet to a circle at the outlet, with the radius of the rounded corners gradually increasing along the flow direction. Based on the aforementioned characteristic cross-section, a continuous and smooth flow channel sidewall is generated, resulting in a three-dimensional flow channel model.

[0041] Of course, the computer-executable instructions provided in the embodiments of the present invention are not limited to the method operations described above, but can also execute related operations in the parameterized design method of the elbow-shaped water inlet channel provided in any embodiment of the present invention.

[0042] Based on the above description of the implementation methods, those skilled in the art can clearly understand that the present invention can be implemented using software and necessary general-purpose hardware, and of course, it can also be implemented using hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as a computer floppy disk, read-only memory (ROM), random access memory (RAM), flash memory, hard disk, or optical disk, etc., including several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods described in the various embodiments of the present invention.

[0043] It is worth noting that in the embodiments of the above-mentioned elbow-shaped water inlet parametric design device, the various units and modules included are only divided according to functional logic, but are not limited to the above division, as long as the corresponding functions can be achieved; in addition, the specific names of each functional unit are only for easy differentiation and are not used to limit the scope of protection of the present invention.

[0044] Although the present invention has been described in detail above with general descriptions, specific embodiments, and experiments, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, all such modifications or improvements made without departing from the spirit of the present invention fall within the scope of protection claimed by the present invention.

Claims

1. A parametric design method for an elbow-shaped water inlet channel, characterized in that, include: Based on the preset three-dimensional structure of the elbow-shaped water inlet channel, a fourth-order Bezier curve is used to fit the three-dimensional spatial guide line of the channel; wherein, the three-dimensional spatial guide line is defined by five control points; The five control points are set in the symmetrical plane of the elbow-shaped water inlet channel and satisfy the preset constraint conditions. Feature sections are placed at multiple preset positions along the three-dimensional spatial guide line of the flow channel; wherein, the feature sections are perpendicular to the three-dimensional spatial guide line of the flow channel, the cross-sectional area continuously shrinks along the flow direction, and the cross-sectional shape gradually changes from a rectangle or rounded rectangle at the inlet of the elbow-shaped water inlet to a circle at the outlet, with the radius of the rounded corners gradually increasing along the flow direction. Based on the aforementioned characteristic cross-section, a continuous and smooth flow channel sidewall is generated, resulting in a three-dimensional flow channel model.

2. The method according to claim 1, characterized in that, Based on the pre-designed three-dimensional structure of the elbow-shaped inlet channel, a fourth-order Bézier curve is used to fit the three-dimensional spatial guide line of the channel, including: Based on the three-dimensional shape of the elbow-shaped inlet channel, a fourth-order Bézier curve is used as the three-dimensional spatial guide line of the channel, and five control points are sequentially set along the inlet flow direction. , , , and Define the three-dimensional guide lines of the flow channel: Wherein, B(t) represents the three-dimensional guide line of the flow channel. .

3. The method according to claim 2, characterized in that, The five control points are set within the symmetrical plane of the elbow-shaped water inlet channel and satisfy preset constraints, including: All five control points are located within the symmetry plane, which is the XZ plane. The control points use two-dimensional coordinates within the XZ plane. It is represented as such, and satisfies the following geometric constraints: The direction of flow is consistent with the inlet flow direction and coincides with the pump mounting surface. , , ,in, The outlet diameter of the elbow-shaped water inlet channel is [missing information]. Set the parameters for the first one; The direction is consistent with the direction of the water pump axis. , , ,in, Set parameters for the second one; Among them, the length of the water intake section The setting is determined based on the total length of the pump body. The height is the center height of the impeller; Control the elbow flexion shape. , , .

4. The method according to claim 2, characterized in that, Feature sections are placed at multiple preset positions along the three-dimensional spatial guide line of the flow channel, including: The positions of the five characteristic sections are defined by the t-value; Configure the parameter specifications of the feature section to create the corresponding feature section; wherein, the parameter specifications include the section shape, size, fillet radius and section area; The feature section is placed at a defined t value along the guide line.

5. The method according to claim 1, characterized in that, Based on the aforementioned characteristic cross-section, a continuous and smooth flow channel sidewall is generated, resulting in a three-dimensional flow channel model, including: Based on the characteristic cross-section, interpolation of the flow channel sidewall cross-section is performed to achieve a smooth transition from the inlet shape to the outlet shape, generating a continuous and smooth elbow-shaped inlet flow channel three-dimensional flow channel model.

6. A parametric design device for an elbow-shaped water inlet channel, characterized in that, include: The guide line determination module is used to fit the three-dimensional spatial guide line of the flow channel using a fourth-order Bézier curve based on the preset three-dimensional structure of the elbow-shaped water inlet channel; wherein, the three-dimensional spatial guide line is defined by five control points; The control point setting module is used to set the five control points in the symmetrical plane of the elbow-shaped water inlet channel and satisfy the preset constraint conditions. A feature section placement module is used to place feature sections at multiple preset positions along the three-dimensional spatial guide line of the flow channel; wherein, the feature section is perpendicular to the three-dimensional spatial guide line of the flow channel, the cross-sectional area continuously shrinks along the flow direction, and the cross-sectional shape gradually changes from a rectangle or rounded rectangle at the inlet of the elbow-shaped water inlet to a circle at the outlet, with the rounded radius gradually increasing along the flow direction; The three-dimensional flow channel model determination module is used to generate continuous and smooth flow channel sidewalls based on the characteristic cross-section to obtain a three-dimensional flow channel model.

7. The apparatus according to claim 6, characterized in that, The guide line determination module is specifically used for: Based on the three-dimensional shape of the elbow-shaped inlet channel, a fourth-order Bézier curve is used as the three-dimensional spatial guide line of the channel, and five control points are sequentially set along the inlet flow direction. , , , and Define the three-dimensional guide lines of the flow channel: Wherein, B(t) represents the three-dimensional guide line of the flow channel. .

8. The apparatus according to claim 7, characterized in that, The control point setting module is specifically used for: All five control points are located within the symmetry plane, which is the XZ plane. The control points use two-dimensional coordinates within the XZ plane. It is represented as such, and satisfies the following geometric constraints: The direction of flow is consistent with the inlet flow direction and coincides with the pump mounting surface. , , ,in, The outlet diameter of the elbow-shaped water inlet channel is [missing information]. Set the parameters for the first one; The direction is consistent with the direction of the water pump axis. , , ,in, Set parameters for the second one; Among them, the length of the water intake section The setting is determined based on the total length of the pump body. The height is the center height of the impeller; Control the elbow flexion shape. , , .

9. An electronic device, characterized in that, include: One or more processors; Memory, used to store one or more programs; When the one or more programs are executed by the one or more processors, the one or more processors implement the parameterized design method for elbow-shaped inlet channels as described in any one of claims 1-5.

10. A storage medium containing computer-executable instructions, characterized in that, The computer-executable instructions, when executed by a computer processor, are used to perform the parameterized design method for the elbow-shaped inlet channel as described in any one of claims 1-5.

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