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Arc tenon blade root extension structure design method

A technology of structural design and circular arc, which is applied to mechanical equipment, parts of pumping devices for elastic fluids, non-variable pumps, etc., can solve problems such as unsatisfactory distribution, optimal processing, and inability to shorten the design Effects vs. modeling time, good results

Inactive Publication Date: 2021-08-10
BEIHANG UNIV
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  • Claims
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Problems solved by technology

At present, this part of the root extension design method is mainly drawn manually in UG software, and there are the following problems: (1) It is impossible to obtain a smooth leaf root surface. In the finite element analysis, the stress result is too large and the distribution Unsatisfactory; (2) manual adjustment, the next optimization process cannot be performed

Method used

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  • Arc tenon blade root extension structure design method
  • Arc tenon blade root extension structure design method
  • Arc tenon blade root extension structure design method

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Embodiment Construction

[0036] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them.

[0037] In order to solve the problems existing in the existing technology, such as Figure 1 to Figure 4 As shown, the present invention provides a method for designing the root extension structure of a circular tenon blade, comprising the following steps:

[0038] S1. Determine the design parameters:

[0039] like figure 1 As shown, the aerodynamic profile of the hollow blade and the characteristic parameters of the arc tenon are given. like figure 2 As shown, the solid model of the hollow blade body and the arc tenon is determined according to the shape data of the blade and the tenon; the radius of the inner and outer boundaries of the arc tenon ...

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Abstract

The invention provides an arc tenon blade root extension structure design method. The method comprises the following five steps of S1, determining design parameters; S2, extracting a thickness change rule; S3, drawing a control arc; S4, drawing a blade basin line and a blade back line; and S5, guiding in UG. According to the method, a complex blade root surface design problem is converted into a blade profile line generation problem, so that the problem is simplified; and through a group of parameters and equations, the curvature, the shape, the position and the thickness of a blade profile are flexibly controlled, and the method can well adapt to the complex distortion structure of a fan blade and is widely applied to the design of various arc tenon blades. The method can also provide a basis for designing hollow blades with more complex structures in the future; and an arc tenon blade root extension structure can be transformed by changing parameter variables, and optimization variables are provided for subsequent structure optimization. The method is applied to a design project, the design and modeling time is greatly shortened, and a good effect is achieved.

Description

technical field [0001] The invention relates to the technical field of design of aeroengine fan blades, in particular to a method for designing a circular-arc tenon blade extension root structure. Background technique [0002] The split-type titanium alloy wide-chord hollow fan blade is a new type of hollow fan blade currently being researched in China, and it is a key structure serving my country's large bypass ratio aeroengine. The fan blades of modern civil large-bypass turbofan engines are mostly designed with wide-chord blades. Compared with narrow-chord blades with damping tables, wide-chord blades have the advantages of increasing the engine surge margin, resisting foreign object damage, improving engine thrust, Advantages such as reducing the number of leaves. As engines have higher and higher requirements on thrust-to-weight ratio, wide-chord fan blades are also developing in the direction of larger and larger sizes, and the demand for weight reduction of blades is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D25/08F04D29/38
CPCF04D25/08F04D29/386F04D29/388
Inventor 蒋向华乔琛王延荣魏大盛
Owner BEIHANG UNIV
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