A riveting structure of a ceramic matrix composite and a metal material

Abstract

The utility model discloses a riveting structure of ceramic matrix composite material and metal material belongs to riveting technical field of ceramic matrix composite material, solves the problem that the difference of deformation of ceramic matrix composite material and metal material is big under high temperature environment, and then leads to the low problem of the connecting strength of both, and its specific including ceramic matrix composite material cylinder part and metal ring connecting part, metal ring connecting part is sleeved on ceramic matrix composite material cylinder part, and ceramic matrix composite material cylinder part and metal ring connecting part are connected through the rivet of first reserved hole and second reserved hole, in the utility model, metal ring connecting part is sleeved on ceramic matrix composite material cylinder part, and sets up the rivet at the sleeved part, and the connecting strength of both is strengthened, can keep stable connection even under high temperature environment, simultaneously, the rivet still consolidates ceramic matrix composite material cylinder part, avoids the separation of ceramic matrix composite material own layer in the vibration environment.

Description

Technical Field

[0001] This utility model relates to the field of riveting technology for ceramic matrix composite materials, and in particular to a riveting structure for ceramic matrix composite materials and metal materials. Background Technology

[0002] To improve the high-temperature resistance of military aircraft engines, existing technologies use ceramic matrix composites to prepare all-composite engine hot-end components. However, ceramic matrix composites inevitably need to be connected and overlapped with metal materials in engine systems. Since the coefficient of thermal expansion of metal materials is larger than that of ceramic matrix composites, the deformation of metal materials and ceramic matrix composites at high temperatures is not synchronized. Therefore, the connection structure between the two is prone to loosening under high temperatures, leading to damage to engine components. In addition, in periodic vibration environments, ceramic matrix composites made of multilayer carbon felt are also prone to delamination at bending points.

[0003] To address the aforementioned issues, Chinese invention patent CN105948825A discloses a ceramic composite layer for brazing and its manufacturing method. In this patent, a metallization layer is formed on the surface of a ceramic substrate, and a solder layer, prepared by a printing process and sintered, is formed on the metallization layer, allowing for a tight bond between the solder layer and the ceramic. While this connection method can achieve the connection between the metal material and the ceramic composite material, it still cannot reduce the difference in deformation between the metal material and the ceramic matrix composite material under high-temperature conditions. Furthermore, due to the vibration environment of the components, the weld layer and the carbon felt-laid ceramic matrix composite material may detach.

[0004] Chinese invention patent CN110293491A discloses a statically determinate bonding fixture and method for a ceramic-based composite cover and a metal insert ring. While the statically determinate bonding method in this patent can minimize process stress, deformation and cracking under severe vibration are still unavoidable. Utility Model Content

[0005] To address the shortcomings of existing technologies, this invention provides a riveting structure for ceramic matrix composite materials and metal materials, which solves the problem of low connection strength between the two materials due to the large difference in deformation between ceramic matrix composite materials and metal materials under high temperature environments.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] A riveting structure for ceramic matrix composite material and metal material includes a ceramic matrix composite cylindrical component and a metal ring connecting component; the metal ring connecting component is sleeved on the ceramic matrix composite cylindrical component; a first reserved hole is opened on the ceramic matrix composite cylindrical component, a second reserved hole is opened on the metal ring connecting component, and the ceramic matrix composite cylindrical component and the metal ring connecting component are connected by rivets passing through the first reserved hole and the second reserved hole.

[0008] In this design, the metal ring connecting component is connected to the ceramic matrix composite cylindrical component by a sleeve, and the sleeve is reinforced by rivets to enhance the connection strength, ensuring a stable connection even in high-temperature or vibration environments. At the same time, the rivets also reinforce the ceramic matrix composite cylindrical component, preventing the ceramic matrix composite layer from separating in vibration environments.

[0009] Furthermore, several second reserved holes are provided, and these several second reserved holes are evenly distributed along the circumference of the metal ring connecting component.

[0010] Furthermore, a rectangular notch is provided between two adjacent second reserved holes on the metal ring connecting component;

[0011] The rectangular notch is open at the end near the metal ring connecting component's sleeve interface, and closed at the end away from the metal ring connecting component's sleeve interface.

[0012] In this design, several rectangular notches are made on the metal ring connecting component. When the metal ring connecting component deforms under high temperature, the rectangular notches can shrink their width to adapt to the deformation of the metal ring connecting component, thereby reducing the deformation of the metal ring connecting component relative to the ceramic matrix composite cylindrical component, and thus overcoming the defect of loose connection caused by the large difference in deformation between the two under high temperature.

[0013] Furthermore, a circular notch is machined at one end of the rectangular notch that is closed;

[0014] The radius of the circular notch is greater than the width of the rectangular notch.

[0015] In this design, when the radius of the circular notch is greater than the width of the rectangular notch, the deformation of the metal ring connecting component caused by high temperature is minimized, thus minimizing the impact on the connection strength between the ceramic matrix composite cylindrical component and the metal ring connecting component.

[0016] Furthermore, a high-temperature adhesive is applied between the contact surfaces of the ceramic matrix composite cylindrical component and the metal ring connecting component.

[0017] In this solution, a high-temperature adhesive is applied between the ceramic matrix composite cylindrical component and the metal ring connecting component. After the high-temperature adhesive solidifies, the stability of the connection structure is further improved.

[0018] Furthermore, the rivets are coated with high-temperature adhesive.

[0019] The beneficial effects of this utility model are:

[0020] In the riveting structure of ceramic matrix composite material and metal material provided by this utility model, rivets are used to rivet the sleeved ceramic matrix composite cylindrical component and the metal ring connecting component, increasing their connection strength and preventing the separation of the ceramic matrix composite layer itself in a vibration environment. Several rectangular notches are machined on the metal ring connecting component, and circular notches are machined at the ends of the rectangular notches. The rectangular and circular notches can reduce the thermal deformation of the metal ring connecting component in a high-temperature environment through their own shrinkage deformation, ensuring that the connection between the ceramic matrix composite cylindrical component and the metal ring connecting component remains secure and preventing damage to the components. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of a riveting structure between a ceramic matrix composite material and a metal material according to the present invention;

[0022] Figure 2 This is a schematic diagram of the structure of the metal ring connecting component of this utility model;

[0023] Figure 3 This is a schematic diagram of the ceramic matrix composite cylindrical component of this utility model.

[0024] Figure label:

[0025] 1. Ceramic matrix composite cylindrical component; 101. First reserved hole; 2. Metal ring connecting component; 201. Circular notch; 202. Rectangular notch; 203. Second reserved hole; 301. Rivet; Detailed Implementation

[0026] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. The specific embodiments of the present invention are described below to facilitate understanding by those skilled in the art. However, it should be understood that the present invention is not limited to the scope of the specific embodiments. For those skilled in the art, various changes are obvious as long as they fall within the spirit and scope of the present invention as defined and determined by the appended claims. All inventions utilizing the concept of the present invention are protected.

[0027] Example 1

[0028] like Figures 1-3As shown, this embodiment provides a riveting structure for a ceramic matrix composite material and a metal material. This riveting structure has high connection strength and can prevent loosening at the connection point caused by the large difference in deformation between the ceramic matrix composite material and the metal material under high temperature conditions. Simultaneously, the structure between the layers of the ceramic matrix composite material itself is reinforced to prevent detachment between the layers in a vibration environment. Specifically, it includes:

[0029] Ceramic matrix composite cylindrical component 1 and metal ring connecting component 2;

[0030] The metal ring connecting component 2 is sleeved on the ceramic matrix composite cylindrical component 1; the ceramic matrix composite cylindrical component 1 has a first reserved hole 101, and the metal ring connecting component 2 has a second reserved hole 203. The ceramic matrix composite cylindrical component 1 and the metal ring connecting component 2 are connected by rivets 301 that pass through the first reserved hole 101 and the second reserved hole 203.

[0031] Several second reserved holes 203 are provided, and the several second reserved holes 203 are evenly distributed along the circumference of the metal ring connecting component 2.

[0032] A rectangular notch 202 is provided between two adjacent second reserved holes 203 on the metal ring connecting component 2; the rectangular notch 202 is open at one end near the sleeve interface of the metal ring connecting component 2, and closed at the other end away from the sleeve interface of the metal ring connecting component 2; when the metal ring connecting component 2 deforms in a high-temperature environment, the rectangular notch 202 can adapt to the deformation of the metal ring connecting component 2 by shrinking its width, so as to reduce the deformation of the metal ring connecting component 2 relative to the ceramic matrix composite cylindrical component 1, thereby overcoming the defect of loose connection caused by the large difference in deformation between the two in a high-temperature environment.

[0033] A circular notch 201 is machined at one closed end of the rectangular notch 202; the radius of the circular notch 201 is greater than the width of the rectangular notch 202. When the radius of the circular notch 201 is greater than the width of the rectangular notch 202, the deformation caused by high temperature to the metal ring connecting component 2 is minimized, and thus the impact on the connection strength between the ceramic matrix composite cylindrical component 1 and the metal ring connecting component 2 is minimized.

[0034] As a preferred embodiment, the rivet 301 is made of metal.

[0035] Example 2

[0036] This embodiment is based on the riveting structure of ceramic matrix composite material and metal material provided in Embodiment 1. High-temperature adhesive is applied between the contact surfaces of the ceramic matrix composite cylindrical component 1 and the metal ring connecting component 2, and high-temperature adhesive is applied to the rivet 301 to further improve the stability of its connection structure.

[0037] The connection method using high-temperature adhesive is as follows:

[0038] High-temperature adhesive is applied to the contact surfaces of the ceramic matrix composite cylindrical component 1 and the metal ring connecting component 2 respectively. After the coating is completed, the metal ring connecting component 2 is fitted onto the ceramic matrix composite cylindrical component 1.

[0039] Then, apply a layer of high-temperature adhesive to the rivet 301. After the coating is completed, pass the rivet 301 through the first reserved hole 101 and the second reserved hole 203 to connect the ceramic matrix composite cylindrical component 1 and the metal ring connecting component 2.

[0040] Place the assembled assembly at room temperature until the high-temperature adhesive solidifies, and the connection is complete.

[0041] As a preferred embodiment, the rivet 301 is made of ceramic matrix composite material.

[0042] Those skilled in the art will recognize that the embodiments described herein are intended to help the reader understand the principles of this invention, and should be understood that the scope of protection of this invention is not limited to such specific statements and embodiments. Those skilled in the art can make various other specific modifications and combinations based on these technical teachings disclosed in this invention without departing from the essence of this invention, and these modifications and combinations are still within the scope of protection of this invention.

Claims

1. A riveting structure for a ceramic matrix composite material and a metal material, characterized in that: The device includes a ceramic matrix composite cylindrical component (1) and a metal ring connecting component (2); the metal ring connecting component (2) is sleeved on the ceramic matrix composite cylindrical component (1); the ceramic matrix composite cylindrical component (1) has a first reserved hole (101), the metal ring connecting component (2) has a second reserved hole (203), and the ceramic matrix composite cylindrical component (1) and the metal ring connecting component (2) are connected by rivets (301) that pass through the first reserved hole (101) and the second reserved hole (203); The second reserved hole (203) is provided in a plurality of them, and the plurality of the second reserved holes (203) are evenly distributed along the circumference of the metal ring connecting component (2); A rectangular notch (202) is provided between two adjacent second reserved holes (203) on the metal ring connecting component (2); the rectangular notch (202) is open at one end near the sleeve interface of the metal ring connecting component (2), and closed at the other end away from the sleeve interface of the metal ring connecting component (2); The rectangular notch (202) has a circular notch (201) at one closed end; the radius of the circular notch (201) is greater than the width of the rectangular notch (202).

2. The riveting structure of ceramic matrix composite material and metal material according to claim 1, characterized in that: A high-temperature adhesive is applied between the contact surfaces of the ceramic matrix composite cylindrical component (1) and the metal ring connecting component (2).

3. The riveting structure of ceramic matrix composite material and metal material according to claim 1, characterized in that: The rivet (301) is coated with high-temperature adhesive.

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