Elastic ring, method for adjusting rigidity of elastic ring, and method for manufacturing elastic ring

Abstract

The application provides an elastic ring, a rigidity adjusting method of the elastic ring and a manufacturing method of the elastic ring, and belongs to the technical field of elastic support. The elastic ring specifically comprises a ring body, the inner circumferential side and the outer circumferential side of the ring body are both distributed with convex bosses protruding in the radial direction, the inside of the convex boss is provided with a cavity, the cavity is filled with a lattice structure, the lattice structure is connected with the inner wall of the cavity, and the radial rigidity of the elastic ring is adjusted by adjusting the filling coefficient of the lattice structure in the cavity. Through the processing scheme, the rigidity of the elastic ring can be adjusted under the condition that the material and geometric parameters of the elastic ring are unchanged.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of elastic support, in particular to an elastic ring and a rigidity adjusting method thereof, and a manufacturing method of the elastic ring. BACKGROUND

[0002] The working speed of modern aero-engines is generally above 10000r / min, and the working speed of some small engines is as high as 40000-50000r / min. For such high-speed engines, the vibration and stability of the rotor-support system are the key to structural integrity and reliability. In the design of the engine, it is often very difficult to adjust the critical speed by changing the rotor structure (the diameter of the shaft, the distance of the support point, etc.), especially when the overall structure of the engine has been determined. At this time, the most effective and feasible method is to use elastic support. The elastic ring has circumferentially uniform and staggered inner and outer bosses, the inner bosses bear the pressure of the bearing, and the outer bosses transmit the pressure to the casing. In the dynamic analysis and design of the rotor system, the rigidity parameter of the elastic ring is a very important design constant, and its value will directly affect the critical speed, vibration mode, unbalance response and transmission characteristics of the rotor system.

[0003] At present, the methods for adjusting the rigidity of the elastic ring are mostly adjusting the geometric parameters of the elastic ring or changing the materials used by the elastic ring. However, due to the overall design limitation, the range of adjustment of the geometric parameters of the elastic ring is very limited; at the same time, due to the working condition limitation of the elastic ring, the types of materials that can be used are limited. Therefore, the existing method for adjusting the rigidity of the elastic ring is very limited. SUMMARY

[0004] Therefore, the present application provides an elastic ring and a rigidity adjusting method thereof, and a manufacturing method of the elastic ring, which solves the problem that the rigidity adjustment of the elastic ring in the prior art is limited by the geometric parameters and the types of materials of the elastic ring, and can adjust the rigidity of the elastic ring without changing the materials and the geometric parameters of the elastic ring.

[0005] In one aspect, the present application provides an elastic ring using the following technical solution:

[0006] An elastic ring, comprising a ring body, the inner and outer circumferential sides of the ring body are distributed with bosses protruding in the radial direction, the inside of the boss is provided with a cavity, the cavity is filled with a lattice structure, and the lattice structure is connected to the inner wall of the cavity.

[0007] Optionally, the lattice structure is consistent with the material of the boss.

[0008] Optionally, the unit lattice of the lattice structure is a cross-intersecting vertical lattice.

[0009] Optionally, the lattice structure is uniformly filled in the cavity.

[0010] In another aspect, the application provides a method for adjusting the stiffness of an elastic ring, which adopts the following technical solution:

[0011] A method for adjusting the stiffness of an elastic ring, the elastic ring comprising a ring body, the inner and outer circumferential sides of the ring body being distributed with radially protruding bosses, the radial stiffness of the elastic ring being adjusted by adjusting the equivalent elastic modulus of the bosses.

[0012] The radial stiffness of the elastic ring is adjusted by adjusting the filling factor of the lattice structure in the cavity.

[0013] In another aspect, the application provides a method for manufacturing an elastic ring, which adopts the following technical solution:

[0014] A method for manufacturing an elastic ring, the elastic ring being manufactured by additive technology, the filling factor of the lattice structure in the cavity being adjusted according to the required radial stiffness of the elastic ring.

[0015] An opening is provided on the outer wall of the top end of the boss, the powder remaining inside the cavity is discharged through the opening, and the opening is blocked after the overall elastic ring production is completed.

[0016] In summary, the application has the following beneficial technical effects:

[0017] The elastic ring structure of the application can change the equivalent Young's modulus of the boss structure by adjusting the density of the lattice structure in the boss cavity of the elastic ring, i.e., the filling factor of the lattice structure, and ultimately achieve the effect of changing the radial stiffness of the overall structure of the elastic ring, thereby changing the overall radial stiffness of the elastic ring without changing the material and other geometric parameters of the elastic ring.

[0018] At the same time, since the boss of the elastic ring is changed from the original solid structure to the existing lattice structure, the mass is reduced, which plays a role in reducing the weight of the overall design.

[0019] The method of changing the stiffness of the elastic ring by changing the filling factor of the lattice structure in the boss cavity of the elastic ring brings more possibilities to the design of the elastic ring. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the application, the drawings needed in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor.

[0021] Figure 1 It is an external structure diagram of the elastic ring of the application.

[0022] Figure 2 Part cross-sectional view of the elastic ring of the present application;

[0023] Figure 3 Structure diagram of the outer boss of the present application;

[0024] Figure 4 Structure diagram of the cavity filled with lattice structure of the present application;

[0025] Figure 5 Structure diagram of the cross-shaped intersecting vertical unit lattice of the present application;

[0026] Figure 6 Structure diagram of the opening on the outer wall surface of the boss top of the present application.

[0027] Explanation of reference numerals: 1, ring body; 2, outer boss; 3, inner boss; 4, cavity; 5, lattice structure; 6, opening. DETAILED DESCRIPTION

[0028] The embodiments of the present application will be described in detail below with reference to the drawings.

[0029] The embodiments of the present application will be described in detail below with reference to the drawings.

[0030] It should be noted that various aspects of the embodiments described below are within the scope of the appended claims. It should be apparent that the aspects described herein can be embodied in a wide variety of forms and that any specific structure and / or function described herein is merely illustrative. Based on the teachings herein one skilled in the art should appreciate that an aspect described herein can be implemented independently of any other aspects and that an aspect described herein can be implemented both as any number of software and / or hardware configurations and that the examples described herein are not the only way to implement such aspects. In addition, two or more aspects described herein can be implemented as a single aspect and vice versa.

[0031] It should also be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of this application. The drawings only show the components related to this application and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0032] Furthermore, specific details are provided in the following description to facilitate a thorough understanding of the examples. However, those skilled in the art will understand that the described aspects can be practiced without these specific details.

[0033] This application provides an elastic ring.

[0034] like Figure 1 An elastic ring is shown, comprising a ring body 1. Both the inner and outer circumferential sides of the ring body 1 are provided with radially protruding bosses. The inner side of the ring body 1 is provided with a plurality of bosses evenly distributed in the circumferential direction. The bosses on the inner side of the ring body 1 protrude radially inward to form inner bosses 3. The outer side of the ring body 1 is provided with a plurality of bosses evenly distributed in the circumferential direction. The bosses on the outer side of the ring body 1 protrude radially outward to form outer bosses 2.

[0035] In one embodiment, the number of inner bosses 3 and outer bosses 2 are the same, and they are staggered.

[0036] like Figures 2-4 As shown, in one embodiment, the boss has a closed cavity 4 inside, and the cavity 4 is filled with a lattice structure 5, which is connected to the inner wall of the cavity 4. The lattice structure 5 provides support for the inner wall of the cavity 4.

[0037] By adjusting the filling coefficient (density) of lattice structure 5, the equivalent Young's modulus of the boss structure is changed, ultimately altering the overall radial stiffness of the elastic ring. This allows for the modification of the overall radial stiffness of the elastic ring without changing the material or other geometric parameters (number of bosses, boss width, or other geometric parameters of the elastic ring).

[0038] At the same time, as the elastic ring boss changes from the original solid structure to the existing lattice structure 5, its mass is reduced, which plays a role in reducing the weight of the overall design.

[0039] The lattice structure 5 is made of the same material as the protrusion.

[0040] like Figure 5 As shown, the unit cell lattice of the crystal structure 5 is a cross-shaped perpendicular lattice. In other embodiments, other types of unit cell lattices can also be used to form the crystal structure 5 used to fill the cavity 4.

[0041] The lattice structure 5 is uniformly filled in the cavity 4.

[0042] In this application embodiment, a method for adjusting the stiffness of an elastic ring is also disclosed.

[0043] A method for adjusting the stiffness of an elastic ring, wherein the elastic ring includes a ring body 1, and the inner and outer circumferential sides of the ring body 1 are provided with radially protruding bosses. The radial stiffness of the elastic ring is adjusted by adjusting the equivalent elastic modulus of the bosses.

[0044] Specifically, the radial stiffness of the elastic ring is adjusted by adjusting the filling coefficient of the lattice structure 5 filling the cavity 4.

[0045] By adjusting the density of the lattice structure 5 in cavity 4, i.e., the filling coefficient of the lattice structure 5, the equivalent Young's modulus of the boss structure is changed, ultimately altering the radial stiffness of the overall elastic ring structure. Wherein: Lattice structure filling coefficient = lattice structure volume / cavity volume.

[0046] For example, without changing the material used, when the lattice structure 5 filling factor inside the boss cavity 4 is 50%, the equivalent elastic modulus of the boss will become about 50% of the original material, and the overall radial stiffness of the elastic ring will decrease by about 20%.

[0047] This application also discloses a method for manufacturing an elastic ring.

[0048] A method for manufacturing an elastic ring, wherein the elastic ring is manufactured by additive manufacturing technology: selective laser melting technology is used, and the filling coefficient of the lattice structure 5 in the cavity 4 is adjusted according to the radial stiffness required by the design of the elastic ring.

[0049] like Figure 6 As shown, an opening 6 is made on the outer wall of the top of the boss. The opening 6 connects the internal cavity 4 of the boss to the outside of the boss. Powder remaining in the cavity 4 is discharged through the opening 6. The opening 6 is sealed after the production of the overall elastic ring is completed.

[0050] In one embodiment, the opening 6 can be sealed by welding or other processes after the overall elastic ring is produced, so as to ensure the various other properties of the elastic ring in the working state.

[0051] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. An elastic ring comprising a ring body, the inner and outer peripheral sides of which are provided with projections projecting in the radial direction, characterized in that, The boss is internally provided with a cavity, the cavity is filled with a lattice structure, the lattice structure is connected to the inner wall of the cavity, and the unit lattice of the lattice structure is a cross-over vertical lattice. The elastic ring is manufactured by additive technology, and the filling coefficient of the lattice structure in the cavity is adjusted according to the radial stiffness requirement of the elastic ring design; An opening is arranged on the outer wall of the top end of the boss, powder remaining in the cavity is discharged through the opening, and the opening is blocked after the production of the whole elastic ring is completed.

2. The elastomeric ring of claim 1, wherein, The lattice structure is consistent with the material of the boss.

3. The elastomeric ring of claim 1, wherein, The lattice structure is uniformly filled in the cavity.

4. The elastomeric ring of claim 1, wherein, The elastic ring comprises a ring body, the inner and outer circumferential sides of the ring body are distributed with bosses protruding in the radial direction, and the radial stiffness of the elastic ring is adjusted by adjusting the equivalent elastic modulus of the bosses.

5. A method of adjusting the stiffness of an elastomeric ring, characterized in that, The radial stiffness of the elastic ring is adjusted by adjusting the filling coefficient of the lattice structure in the cavity according to any one of claims 1-3.

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