Equal-section film disc and simulation model construction method
By using equal-section film discs composed of functional gradient materials in the film discs, the problem of uneven strain distribution of traditional film disc materials is solved, and the effect of uniform strain in the radial direction of the film discs is achieved.
Patent Information
- Application Number
- CN202411640776.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-18
- Publication Date
- 2025-02-18
AI Technical Summary
Traditional membrane disk materials have problems such as single elastic modulus and uneven strain distribution, which leads to prone to deformation and failure under complex stress states. At the same time, it is difficult to process, low yield and safety hazards.
The iso-sectional film disc composed of functional gradient materials is formed by stacking titanium alloys and graphene materials with different elastic modulus layer by layer to form a gradient structure to ensure uniform thickness in the radial direction, and the performance of the film disc is constructed by HyperMesh software. simulation.
The membrane disk is uniform in the radial direction, the processing difficulty and yield of the traditional membrane disk structure are optimized, safety hazards are reduced, and the overall performance of the membrane disk is improved.
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Figure CN119475627A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of mechanical transmission protection, and in particular to a uniform cross-section diaphragm disk and a simulation model construction method. Background Art
[0002] The diaphragm is a core component of rotating machinery and is widely used in high-precision mechanical equipment such as aviation and ships. As a part that compensates for various deviations of the rotor system, the diaphragm plays a vital role. The diaphragm is a flexible and thin body that is easily deformed. During operation, the diaphragm bends under force, and its bending deformation has a great influence on the radial and axial vibrations of the diaphragm. However, traditional diaphragm materials often have problems such as a single elastic modulus and uneven strain distribution, which makes the parts prone to deformation and failure under complex stress conditions.
[0003] The cross-section of existing diaphragm discs is mostly curved, and the thickness is often nonlinear with the change in the radial direction. As the radius increases, the thickness becomes smaller and smaller. As a result, the processing difficulty of the diaphragm disc increases, the yield is low and the cost is high. At the same time, when the diaphragm disc is subjected to axial force, the excessively thin thickness may bring a certain degree of safety hazard.
[0004] Therefore, it is necessary to design a diaphragm disk that is easy to process while ensuring uniform radial strain of the diaphragm disk.
[0005] The above contents are only used to assist in understanding the technical solution of the present application and do not constitute an admission that the above contents are prior art. Summary of the invention
[0006] The main purpose of the present application is to provide a diaphragm disk with a uniform cross-section, aiming to solve the problem of how to design an easy-to-process diaphragm disk under the premise of ensuring uniform radial strain of the diaphragm disk.
[0007] To achieve the above-mentioned purpose, the present application provides a uniform cross-section membrane disk, including a membrane disk body, characterized in that the membrane disk body has a uniform thickness along the radial direction, the material of the uniform cross-section membrane disk includes titanium alloy and graphene, and the uniform cross-section membrane disk forms a gradient structure by stacking basic material layers with different elastic moduli layer by layer.
[0008] Optionally, the expression of the composite elastic modulus of the uniform cross-section membrane disk is:
[0009]
[0010] in,
[0011]
[0012] Where, E is the composite elastic modulus of the uniform cross-section membrane disk, E GPLis the elastic modulus of graphene, E M is the elastic modulus of the titanium matrix, V GPL is the volume fraction of graphene, W M is the volume fraction of titanium matrix, ξ L is graphene of graphene, ξ W is the aspect ratio, and L, W, and t are the length, width, and thickness of graphene, respectively.
[0013] Optionally, the material property of the base material layer at any position thereof is expressed by the following formula:
[0014]
[0015] In the formula, Q eff is the overall property of the material, V i is the volume fraction of the material, Q i are the effective properties of the material at that location, including the elastic modulus, density, and Poisson's ratio.
[0016] Optionally, the inner radius of the equal-thickness membrane disk is 18 mm, the outer radius is 60 mm, and the thickness of the membrane disk is 2.4 mm.
[0017] In addition, to achieve the above purpose, the present application also provides a method for constructing a simulation model for the uniform cross-section membrane disk as described above, the method comprising the following steps:
[0018] Basic properties of titanium alloy functional enhanced composite materials with graphene added based on HyperMesh software, including elastic modulus, density and Poisson's ratio;
[0019] applying the basic properties to different layers of a membrane disk of uniform cross-section;
[0020] The membrane disks with different layers are meshed based on HyperMesh software to obtain the simulation model of the membrane disk with equal cross-section.
[0021] Optionally, after the step of meshing the membrane disks of different layers based on the HyperMesh software to obtain a simulation model of the membrane disks of equal cross-section, the method further includes:
[0022] The modal analysis of the diaphragm disk of the simulation model is simulated based on the workbench, including the strain distribution under torque load, the strain distribution under axial deviation and the strain distribution under angular deviation.
[0023] This application has at least the following technical effects:
[0024] The present application provides a uniform cross-section diaphragm disk made of a functional gradient material, which is based on titanium alloy material and titanium alloy material with added graphene. The uniform cross-section diaphragm disk with an elastic modulus gradually decreasing along the radial direction is obtained through additive manufacturing and other methods. Under the premise of ensuring that the radial strain of the variable cross-section diaphragm disk is uniform, the shortcomings of the existing variable cross-section diaphragm disk structure, such as difficult processing and low yield, are optimized. BRIEF DESCRIPTION OF THE DRAWINGS
[0025] Figure 1 A schematic diagram of a curve showing a change in elastic modulus versus radius of a functional gradient material according to an embodiment of the present application;
[0026] Figure 2 This is a curve showing the change of density of the functional gradient material according to the embodiment of the present application with respect to the radius;
[0027] Figure 3 A schematic diagram of the axial nonlinear stiffness of a uniform cross-section diaphragm disk according to an embodiment of the present application;
[0028] Figure 4 A schematic diagram showing the effect of the rotation speed on the stiffness of a diaphragm disk of equal cross-section involved in an embodiment of the present application;
[0029] Figure 5 This is a schematic diagram of the first-order mode of the membrane disk involved in the embodiment of the present application;
[0030] Figure 6 It is a schematic diagram of the second-order mode of the membrane disk involved in the embodiment of the present application;
[0031] Figure 7 It is a schematic diagram of the third-order mode of the membrane disk involved in the embodiment of the present application;
[0032] Figure 8 It is a finite element cloud diagram of strain distribution under output torque load involved in the embodiment of the present application;
[0033] Fig. 9 A curve diagram showing the variation of strain in the radial direction under the output torque load involved in the embodiment of the present application;
[0034] Fig.10 This is a strain distribution diagram under output axial deviation involved in an embodiment of the present application;
[0035] Fig.11 A curve diagram showing the variation of strain along the radial direction under the output axial deviation involved in the embodiment of the present application;
[0036] Fig.12 This is a strain distribution diagram under output angular deviation involved in an embodiment of the present application;
[0037] Fig.13 This is a curve diagram of the strain changing with the radial direction under the output angular deviation involved in the embodiment of the present application.
[0038] Fig.14 This is a schematic diagram of a uniform cross-sectional membrane disk structure involved in an embodiment of the present application.
[0039] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION
[0040] In order to better understand the above technical solution, exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.
[0041] First embodiment
[0042] Reference Fig.14 A schematic diagram of a uniform cross-sectional membrane disk structure is shown. This embodiment provides a uniform cross-sectional membrane disk, including a membrane disk body, wherein the membrane disk body has a uniform thickness along the radial direction (i.e., the thickness in the figure is a), and the material of the uniform cross-sectional membrane disk includes titanium alloy and graphene. The uniform cross-sectional membrane disk forms a gradient structure by stacking basic material layers with different elastic moduli layer by layer.
[0043] Optionally, the expression of the composite elastic modulus of the uniform cross-section membrane disk is:
[0044]
[0045] in,
[0046]
[0047] Where, E is the composite elastic modulus of the uniform cross-section membrane disk, E GPL is the elastic modulus of graphene, E M is the elastic modulus of the titanium matrix, V GPL is the volume fraction of graphene, V M is the volume fraction of titanium matrix, ξ L is graphene of graphene, ξ W is the aspect ratio, and L, W, and t are the length, width, and thickness of graphene, respectively.
[0048] Optionally, the layer-by-layer stacking may be performed by chemical vapor deposition, physical evaporation, plasma spraying, self-propagating high temperature synthesis, and the like.
[0049] Optionally, the material property of the base material layer at any position thereof is expressed by the following formula:
[0050]
[0051] In the formula, Q eff is the overall property of the material, V i is the volume fraction of the material, Q i are the effective properties of the material at that location, including the elastic modulus, density, and Poisson's ratio.
[0052] Optionally, in some specific embodiments, the inner radius of the equal-thickness membrane disk is 18 mm, the outer radius is 60 mm, and the thickness of the membrane disk is 2.4 mm.
[0053] In the technical solution provided in this embodiment, a uniform cross-section diaphragm disk made of a functional gradient material is provided. Based on titanium alloy material and titanium alloy material with added graphene, a uniform cross-section diaphragm disk with an elastic modulus gradually decreasing along the radial direction is obtained through additive manufacturing and other methods. This ensures that the radial strain of the variable cross-section diaphragm disk is uniform, while optimizing the shortcomings of the existing variable cross-section diaphragm disk structure, such as difficult processing and low yield.
[0054] Second embodiment
[0055] In this embodiment, a method for constructing a simulation model of a uniform cross-section membrane disk is provided, and the method comprises the following steps:
[0056] Step S10, adding basic properties of the titanium alloy functional enhanced composite material with graphene based on HyperMesh software, wherein the basic properties include elastic modulus, density and Poisson's ratio;
[0057] Step S20 applies the basic properties to different layers of the uniform cross-sectional membrane disc;
[0058] Step S30 is to mesh the membrane disks of different layers based on the HyperMesh software to obtain a simulation model of the membrane disk with a uniform cross section.
[0059] After S30, the following steps are also included:
[0060] Step S40, based on Workbench simulation, modal analysis of the diaphragm disk of the simulation model, strain distribution under torque load, strain distribution under axial deviation, and strain distribution under angular deviation are performed.
[0061] In this embodiment, the performance simulation test of the uniform cross-section membrane disk constructed based on the description in the first embodiment is carried out by combining HyperMesh software and workbench software.
[0062] Firstly, the elastic modulus, density, axial nonlinear stiffness and rotational speed of the equal-section diaphragm disk were simulated based on HyperMesh software, and the following results were obtained: Figure 1The schematic diagram of the curve of elastic modulus of functional gradient material changing with radius is shown in Figure 2 The schematic diagram of the curve of density variation of functional gradient materials with radius is shown in Figure 3 The schematic diagram of the axial nonlinear stiffness of the uniform cross-section membrane disk is shown in Figure 4 Schematic diagram showing the effect of rotation speed on the stiffness of a diaphragm disk with equal cross-section.
[0063] like Figure 3 As shown in Figure 2, the effect of different stretching and compression on the axial stiffness K is analyzed. z The influence of 0%, 0.5% and 1% graphene content on the axial stiffness is discussed. With the increase of graphene content and the increase of tensile and compressive amounts, the axial stiffness shows an increasing trend. Figure 4 The effect of rotation speed on stiffness K is analyzed. n With the increase of graphene content, the stiffness shows a weaker increasing trend.
[0064] Next, the performance of the model is simulated using workbench, and the following results are obtained: Figure 5 , Figure 6 and Figure 7 Shown are the schematic diagram of the first-order mode of the diaphragm disk, the schematic diagram of the second-order mode of the diaphragm disk, and the schematic diagram of the third-order mode of the diaphragm disk.
[0065] Figure 5 , Figure 6 and Figure 7 They are the two-node diameter mode, three-node diameter mode and one-node circle mode of the diaphragm disk respectively.
[0066] A torque of 950 Nm is applied to the grinding wheel, and the finite element cloud diagram of strain distribution under the output torque load is shown as follows: Figure 8 As shown in the figure, the curve of strain variation with radial direction under output torque load is as follows: Fig. 9 shown.
[0067] like Fig. 9 As shown in the figure, the strain distribution of FGM uniform cross-section diaphragm is more uniform than that of uniform cross-section diaphragm and variable cross-section diaphragm.
[0068] An axial displacement of 1 mm is applied to the diaphragm disk, and the strain distribution under the output axial deviation is as follows: Fig.10 As shown in the figure, the curve of strain variation with radial direction under output axial deviation is as follows: Fig.11 As shown;
[0069] like Fig.11 As shown in the figure, the strain distribution of FGM uniform cross-section diaphragm is more uniform than that of uniform cross-section diaphragm and variable cross-section diaphragm.
[0070] An angular asymmetry of 1° is applied to the membrane disk, and the strain distribution under the output angular deviation is as follows: Fig.12As shown in the figure, the curve of strain changing with radius under output angular deviation is as follows: Fig.13 As shown;
[0071] like Fig.13 As shown in the figure, the strain of FGM uniform cross-section membrane disk is significantly smaller than that of uniform cross-section membrane disk and variable cross-section membrane disk near the inner circle.
[0072] Although the preferred embodiments of the present application have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present application.
[0073] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.
Claims
1. A uniform cross-section membrane disk, comprising a membrane disk body, characterized in that: The thickness of the membrane disc body is uniform along the radial direction. The material of the uniform cross-section membrane disc includes titanium alloy and graphene. The uniform cross-section membrane disc forms a gradient structure by stacking basic material layers with different elastic moduli layer by layer.
2. The uniform cross-section membrane disk according to claim 1, characterized in that: The expression of the composite elastic modulus of the uniform cross-section membrane disk is: in, Where, E is the composite elastic modulus of the uniform cross-section membrane disk, E GPL is the elastic modulus of graphene, E M is the elastic modulus of the titanium matrix, V GPL is the volume fraction of graphene, V M is the volume fraction of titanium matrix, ξ L is graphene of graphene, ξ W is the aspect ratio, and L, W, and t are the length, width, and thickness of graphene, respectively.
3. The uniform cross-section membrane disk according to claim 2, characterized in that: The material properties of the base material layer at any position thereof are expressed by the following formula: In the formula, Q eff is the overall property of the material, V i is the volume fraction of the material, Q i are the effective properties of the material at that location, including the elastic modulus, density, and Poisson's ratio.
4. The uniform cross-section membrane disk according to claim 1, characterized in that: The inner radius of the equal-thickness membrane disk is 18 mm, the outer radius is 60 mm, and the thickness of the membrane disk is 2.4 mm.
5. A method for constructing a simulation model of a uniform cross-section membrane disk as claimed in any one of claims 1 to 4, characterized in that: The method comprises the following steps: Basic properties of titanium alloy functional enhanced composite materials with graphene added based on HyperMesh software, including elastic modulus, density and Poisson's ratio; applying the basic properties to different layers of a membrane disk of uniform cross-section; The membrane disks with different layers are meshed based on HyperMesh software to obtain the simulation model of the membrane disk with equal cross-section.
6. The method according to claim 5, characterized in that After the step of meshing the membrane disks of different layers based on the HyperMesh software to obtain the simulation model of the membrane disks with equal cross-section, the method further includes: The modal analysis of the diaphragm disk of the simulation model is simulated based on the workbench, including the strain distribution under torque load, the strain distribution under axial deviation and the strain distribution under angular deviation.