Ceramic matrix composite 2D winding shaft reinforcement test fixture and test method

Abstract

The present invention provides a ceramic-based composite material 2D winding shaft reinforcement test fixture and test method, which solves the problem of poor stopping performance of the ceramic-based composite material 2D winding shaft and the inability to conduct effective reinforcement effect testing. In the present invention, the ceramic-based composite material 2D winding shaft reinforcement structure includes a 2D winding shaft and a metal corner box, and the 2D winding shaft is provided with three V-shaped stopping grooves; the metal corner box includes a first side plate, a second side plate connected to the side of the first side plate, and two end plates respectively arranged at the two ends of the first side plate and the second side plate; the outer walls of the first side plate and the second side plate are respectively fixed to the two side walls of the stopping groove; the outer walls of the two end plates are fixed to the side walls at both ends of the stopping groove, and the outer edge of the metal corner box is flush with the outer wall of the 2D winding shaft; at the same time, the present invention also provides a reinforcement method for the ceramic-based composite material 2D winding shaft reinforcement structure, a reinforcement test fixture and test method for the reinforcement structure.

Description

Technical Field

[0001] The present invention relates to a reinforcement structure and a reinforcement method of a ceramic matrix composite material, as well as a test tool and a test method for the reinforcement structure, and in particular to a test tool and a test method for a 2D winding shaft reinforcement structure of a ceramic matrix composite material. Background Art

[0002] The performance of 2D-wound shafts made of ceramic matrix composites (CMCs) is currently primarily focused on their load-bearing and torsional properties, with relatively little research on their stopping properties. With the continuous development of CMC applications, the requirements for stopping properties during rotation are also increasing.

[0003] There are two main existing technologies. One is to achieve the stopping performance of the winding shaft by directly slotting it, but the results obtained by this method are not ideal. The other is to improve the stopping performance of the retaining groove by bonding L-shaped composite angle plates into the slot. Although this method improves the stopping performance of the winding shaft to a certain extent, it still cannot meet the requirements of actual working conditions. Therefore, further improving the stopping performance of the winding shaft is of great significance. Summary of the Invention

[0004] The purpose of the present invention is to address the technical problems of the prior art in that the improvement in the stopping performance of winding shafts is less than ideal and that the improvement in the stopping performance of winding shafts cannot be effectively tested. By providing a ceramic matrix composite 2D winding shaft reinforcement test fixture and test method. The present invention improves the stopping performance of winding shafts by designing a ceramic matrix composite 2D winding shaft reinforcement structure, reinforcement method, and corresponding test fixture and test method. The improvement in stopping performance is tested using the test fixture to meet the needs of winding shafts in actual operation.

[0005] To achieve the above-mentioned purpose, the technical solution provided by the present invention is:

[0006] The present invention provides a ceramic matrix composite 2D wound shaft reinforcement structure, comprising a cylindrical 2D wound shaft with two through ends. The 2D wound shaft is made of ceramic matrix composite material, and its outer wall is provided with three retaining grooves of the same size and structure, extending axially and evenly distributed circumferentially. The retaining grooves are of V-shaped structure, and the special features thereof are:

[0007] Includes three metal corner boxes;

[0008] The metal corner box is arranged in the retaining groove;

[0009] The metal corner box includes a first side panel, a second side panel connected to the side edge of the first side panel, and two end panels respectively arranged at the two ends of the first side panel and the second side panel; the angle between the first side panel and the second side panel is the same as the angle between the two side walls of the retaining groove, and the outer side walls of the first side panel and the second side panel are respectively fixed on the two side walls of the retaining groove, and the outer edges of the first side panel and the second side panel are respectively flush with the outer side walls of the 2D winding shaft; the outer sides of the two end panels are fixed with the side walls at both ends of the retaining groove, and the outer edges of the two end panels are flush with the outer side walls of the 2D winding shaft; flush here means that the outer edges of the first side panel, the second side panel and the two end panels are consistent with the shape of the outer side walls of the 2D winding shaft.

[0010] Furthermore, the metal corner box is made of high-temperature alloy.

[0011] Furthermore, the two end plates of the metal corner box are connected to the first side plate by an arc transition and are connected to the second side plate by a right angle.

[0012] Furthermore, the outer side walls of the first side plate and the second side plate are respectively adhered to the two side walls of the retaining groove by high temperature glue, and the outer side walls of the two end plates are respectively adhered to the two end walls of the retaining groove by high temperature glue.

[0013] Furthermore, the angle between the two side walls of the retaining groove extending axially is 95°-110°, and the side opposite to the angle is an opening, which opens toward the outer wall of the 2D winding shaft and has a length less than the length of the 2D winding shaft. The depth of the retaining groove along the radial direction is consistent with the wall thickness of the 2D winding shaft; the two ends of the retaining groove are equidistant from the two ends of the ceramic-based composite material 2D winding shaft; the thickness of the first side plate, the second side plate and the two end plates is 1.5-2mm.

[0014] The present invention also provides a ceramic matrix composite material 2D winding shaft reinforcement method for realizing the above-mentioned ceramic matrix composite material 2D winding shaft reinforcement structure, which is special in that it includes the following steps:

[0015] 1) Processing the 2D winding shaft blank according to the preset size requirements so that the 2D winding shaft blank is cylindrical with both ends connected;

[0016] 2) machining three retaining grooves of the same size and structure on the outer side wall of the 2D winding shaft blank machined in step 1), extending axially and evenly distributed circumferentially;

[0017] 3) According to the size and structure of the retaining groove, three metal corner boxes are processed;

[0018] 4) Apply adhesive to the outer walls of the first side panel, the second side panel, and the two end panels of the metal corner box;

[0019] 5) The three metal corner boxes are respectively embedded and glued into the retaining grooves to ensure that the outer edges of the first side plate, the second side plate and the two end plates are flush with the outer side walls of the 2D winding shaft to obtain a 2D winding shaft reinforcement structure.

[0020] Furthermore, in step 4), the adhesive is a high temperature glue;

[0021] Step 4) also includes applying high-temperature glue on the inner side walls of the retaining groove at the same time.

[0022] The present invention also provides a ceramic matrix composite material 2D wound shaft reinforcement test fixture, which is used for the reinforcement test of the above-mentioned ceramic matrix composite material 2D wound shaft reinforcement structure. The special features of the fixture are:

[0023] It includes a base, a first positioning pin, a second positioning pin, a protective cover and a locking pin pressure head;

[0024] The length and inner diameter of the protective sleeve are respectively adapted to the length and outer diameter of the 2D winding shaft, and is used to be sleeved on the outer surface of the 2D winding shaft; the protective sleeve is provided with through holes corresponding to the three retaining grooves of the 2D winding shaft, and a disconnection seam provided at the top and extending in the axial direction;

[0025] The length of the base is adapted to the length of the protective sleeve, and an arc-shaped groove is provided on the base, the opening of the arc-shaped groove faces upward, and the inner surface of the arc-shaped groove is adapted to the outer surface of the protective sleeve, and the protective sleeve is arranged in the arc-shaped groove; the end surfaces on both sides of the opening of the arc-shaped groove are respectively a high end surface and a low end surface, the height of the high end surface is higher than the axis of the protective sleeve, and the height of the low end surface is lower than the axis of the protective sleeve; one of the three through holes of the protective sleeve is located between the disconnection seam and the low end surface and is arranged close to the disconnection seam;

[0026] The base is further provided with two positioning pin holes corresponding to the other two through holes on the protective cover, for inserting the first positioning pin and the second positioning pin respectively;

[0027] The outer profile and dimensions of the front ends of the first and second locating pins match the inner profile and dimensions of the metal corner box, and the first and second locating pins pass through the corresponding locating pin holes and through holes, respectively, to contact the metal corner box;

[0028] The structure and size of the upper part of the locking pin pressure head are adapted to the mounting end of the static testing equipment and are used to apply pressure; the structure and size of the lower part are adapted to the structure and size of the metal corner box, and the lower part of the locking pin pressure head passes through the through hole near the disconnection seam in a direction perpendicular to the horizontal plane and is used to contact the corresponding metal corner box.

[0029] Furthermore, the width of the disconnection seam is 3-5 mm; and the protective cover is made of nylon.

[0030] The present invention also provides a ceramic matrix composite material 2D wound shaft reinforcement test method, which uses the above-mentioned ceramic matrix composite material 2D wound shaft reinforcement test tool to perform a reinforcement test on the above-mentioned ceramic matrix composite material 2D wound shaft reinforcement structure. The special feature of the method is that it includes the following steps:

[0031] Step 1) Insert the 2D wound shaft reinforcement structure into the protective cover, and rotate the 2D wound shaft reinforcement structure so that the position of the metal corner box corresponds to the position of the through hole on the protective cover;

[0032] Step 2) Install the protective cover with the 2D winding shaft reinforcement structure into the arc-shaped groove of the base. Rotate the protective cover so that the positions of the two through holes in the cover correspond to the positions of the two locating pin holes on the base. Install the first locating pin and the second locating pin, respectively, so that the front ends of the first locating pin and the second locating pin abut against the inner wall of the metal corner box.

[0033] Step 3) Place the structure assembled in Step 2) on a static test bench, install the locking pin indenter, and insert the lower end of the locking pin indenter into the through hole and abut against the corresponding metal corner box;

[0034] Step 4) Apply pressure to the locking pin indenter to perform a static test to obtain a compression load-compression displacement curve, completing the ceramic matrix composite 2D winding shaft reinforcement test.

[0035] The beneficial effects of the present invention are:

[0036] 1. The ceramic-based composite material 2D wound shaft reinforcement structure provided by the present invention uses a metal corner box to reinforce the ceramic-based composite material 2D wound shaft, which has a better reinforcement effect than the L-shaped composite material reinforcement in the prior art, and its load-bearing capacity can be 4 times higher than the load-bearing capacity of the unreinforced ceramic-based composite material 2D wound shaft.

[0037] 2. The ceramic-based composite material 2D wound shaft reinforcement structure and reinforcement method provided by the present invention can effectively solve the problem of easy damage between the compressed layers of the ceramic-based composite material 2D wound shaft retaining groove.

[0038] 3. The ceramic-based composite material 2D wound shaft reinforcement test tooling and test method provided by the present invention are specifically used to test the reinforcement effect of the ceramic-based composite material 2D wound shaft reinforcement structure provided by the present invention. It can not only effectively fix the ceramic-based composite material 2D wound shaft, but also realize the strength test of the ceramic-based composite material 2D wound shaft retaining groove. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 This is a schematic diagram of the three-dimensional structure of an embodiment of a ceramic matrix composite material 2D wound shaft reinforcement structure of the present invention (assembled with a metal corner box);

[0040] Figure 2 This is a schematic structural diagram of a radial cross section of an embodiment of a ceramic matrix composite 2D wound shaft reinforcement structure of the present invention;

[0041] Figure 3 This is a three-dimensional schematic diagram of a metal corner box in an embodiment of a ceramic matrix composite material 2D wound shaft reinforcement structure of the present invention;

[0042] Figure 4 This is a schematic structural diagram of the opening side of the metal corner box in an embodiment of the ceramic matrix composite material 2D winding shaft reinforcement structure of the present invention;

[0043] Figure 5 for Figure 4 Cross-sectional view at CC;

[0044] Figure 6 Schematic diagram of the structure of an embodiment of a ceramic matrix composite material 2D winding shaft reinforcement test fixture of the present invention (locking pin indenter not shown);

[0045] Figure 7 This is a schematic diagram of the structure of fixing the ceramic matrix composite material 2D winding shaft reinforcement structure on the test fixture in step 3) of the embodiment of the ceramic matrix composite material 2D winding shaft reinforcement test method of the present invention;

[0046] Figure 8 Schematic diagram of the structure of an existing ceramic matrix composite 2D winding shaft reinforced by an L-shaped composite material (Comparative Example 1);

[0047] Figure 9 Schematic diagram of the structure of an existing ceramic matrix composite 2D winding shaft without reinforcement (Comparative Example 2);

[0048] Figure 10 This is a compression load-compression displacement curve diagram in an embodiment of the ceramic matrix composite material 2D winding shaft reinforcement test method of the present invention;

[0049] Figure 11 The compression load-compression displacement curve is obtained by performing a reinforcement test on Comparative Example 1 using the same test method as the present invention;

[0050] Figure 12 The compression load-compression displacement curve is obtained by performing a reinforcement test on Comparative Example 2 using the same testing method as the present invention.

[0051] Reference numerals:

[0052] 1-2D winding shaft, 2-metal corner box, 3-base, 4-first positioning pin, 5-second positioning pin, 6-protective cover, 7-locking pin pressure head, 8-first side plate, 9-second side plate, 10-end plate, 11-high end surface, 12-low end surface, 13-disconnection seam, 14-through hole. DETAILED DESCRIPTION

[0053] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0054] The present invention provides a ceramic matrix composite material 2D winding shaft reinforcement structure, such as Figure 1 、 Figure 2 As shown, it includes a cylindrical, through-ended 2D winding shaft 1 and three metal corner boxes 2. The 2D winding shaft 1 is made of a ceramic-based composite material. Its outer wall is provided with three retaining grooves of identical size and structure, extending axially and evenly distributed circumferentially. The retaining grooves are V-shaped, with the angle between the two axially extending walls of the retaining grooves ranging from 95° to 110°. In this embodiment, the angle is preferably 95°. The side opposite the angle is open, facing the outer wall of the 2D winding shaft 1. The length of the retaining groove is less than the length of the 2D winding shaft 1. The radial depth of the retaining groove is consistent with the wall thickness of the 2D winding shaft 1. The ends of the retaining grooves are equidistant from the ends of the ceramic-based composite 2D winding shaft 1. The metal corner boxes 2 are disposed within the retaining grooves.

[0055] like Figure 3-Figure 5 As shown, the metal corner box 2 includes a first side plate 8, a second side plate 9 connected to the side of the first side plate 8, and two end plates 10 respectively arranged at the two ends of the first side plate 8 and the second side plate 9. The angle between the first side plate 8 and the second side plate 9 is the same as the angle between the two side walls of the retaining groove, and the outer side walls of the first side plate 8 and the second side plate 9 are respectively fixed on the two side walls of the retaining groove, and the outer edges of the first side plate 8 and the second side plate 9 are respectively flush with the outer side walls of the 2D winding shaft 1; the outer sides of the two end plates 10 are fixed to the side walls at both ends of the retaining groove, and the outer edges of the two end plates 10 are flush with the outer side walls of the 2D winding shaft 1; flush here means that the outer edges of the first side plate 8, the second side plate 9 and the two end plates 10 are consistent with the shape of the outer side wall of the 2D winding shaft 1. The metal corner box 2 is made of a high-temperature alloy material that is resistant to high temperatures above 800°C. The high-temperature alloy used in this embodiment is GH4099 high-temperature alloy. For ease of fabrication, the two end panels 10 of the metal corner box 2 are connected to the first side panel 8 via a circular transition and to the second side panel 9 at a right angle. The outer walls of the first and second side panels 8, 9, are bonded to the two side walls of the retaining groove using high-temperature adhesive. The outer walls of the two end panels 10 are also bonded to the two end walls of the retaining groove using high-temperature adhesive. The thickness of the first and second side panels 8, 9, and the two end panels 10 ranges from 1.5 to 2 mm, with 1.5 mm being preferred in this embodiment.

[0056] The present invention also provides a method for reinforcing a ceramic matrix composite 2D wound shaft, which is used to realize the above-mentioned ceramic matrix composite 2D wound shaft reinforcement structure, comprising the following steps:

[0057] 1) Processing the 2D winding shaft 1 blank according to the preset size requirements so that the 2D winding shaft 1 blank is cylindrical with both ends through; after preliminary processing, the 2D winding shaft 1 blank has an outer diameter of 100 mm, an inner diameter of 80 mm, a wall thickness of 10 mm, and a length of 100 mm;

[0058] 2) Three retaining grooves of identical size and structure, extending axially and evenly distributed circumferentially, are machined on the outer wall of the 2D winding shaft 1 blank processed in step 1); the retaining grooves are 39 mm long, with a 95° angle between their two side walls, an opening on the side opposite the angle, the opening facing the outer wall of the 2D winding shaft 1, and a radial depth consistent with the wall thickness of the 2D winding shaft 1;

[0059] 3) According to the size and structure of the retaining groove, three metal corner boxes 2 are processed, and the wall thickness of the metal corner boxes 2 is 1.5 mm;

[0060] 4) Apply adhesive (high-temperature glue) to the outer walls of the first and second side panels 8 and 9 and the two end panels 10 of the metal corner box 2. To enhance adhesion, apply high-temperature glue to the inner walls of the retaining groove.

[0061] 5) The three metal corner boxes 2 are respectively embedded and fixed in the retaining grooves to ensure that the outer edges of the first side plate 8, the second side plate 9 and the two end plates 10 are flush with the outer side walls of the 2D winding shaft 1 to obtain a 2D winding shaft reinforcement structure.

[0062] like Figure 6 、 Figure 7 As shown, the present invention also provides a ceramic matrix composite 2D wound shaft reinforcement test fixture for use in reinforcement testing of the aforementioned ceramic matrix composite 2D wound shaft reinforcement structure. The reinforcement test fixture of the present invention includes a base 3, a first locating pin 4, a second locating pin 5, a protective cover 6, and a locking pin indenter 7.

[0063] The length and inner diameter of the protective sleeve 6 are respectively adapted to the length and outer diameter of the 2D winding shaft 1, and are used to be sleeved on the outer surface of the 2D winding shaft 1; the protective sleeve 6 is provided with through holes 14 corresponding to the three retaining grooves of the 2D winding shaft 1, and a disconnection seam 13 arranged at the top and extending axially. The disconnection seam 13 is arranged between the two through holes 14 and close to the side of the through hole 14 for fixing the locking pin pressure head. It passes through the entire wall surface along the length direction of the protective sleeve. The width of the disconnection seam 13 is 3-5mm, and the width of this embodiment is 3mm; the protective sleeve 6 is made of nylon.

[0064] The length of the base 3 is adapted to the length of the protective sleeve 6. The base 3 is provided with an arc-shaped groove with two ends extending therethrough. The opening of the arc-shaped groove faces upward, and the inner surface of the arc-shaped groove is adapted to the outer surface of the protective sleeve 6. The protective sleeve 6 is arranged in the arc-shaped groove. The end faces on both sides of the opening of the arc-shaped groove are respectively the high end face and the low end face. The height of the high end face is higher than the axis of the protective sleeve 6, and the height of the low end face 12 is lower than the axis of the protective sleeve 6. One of the three through holes 14 of the protective sleeve 6 is located between the disconnection seam 13 and the low end face 12 and is arranged close to the disconnection seam 13. The base 3 is also provided with two positioning pin holes corresponding to the other two through holes 14 on the protective sleeve 6, which are used for inserting the first positioning pin 4 and the second positioning pin 5 respectively.

[0065] The outer surface and size of the front end of the first locating pin 4 and the second locating pin 5 are adapted to the inner surface and size of the metal corner box 2. The first locating pin 4 and the second locating pin 5 respectively pass through the corresponding locating pin holes and through holes 14 in sequence to contact the metal corner box 2.

[0066] The structure and size of the upper part of the locking pin press head 7 are adapted to the mounting end of the static testing equipment and are used to apply pressure; the structure and size of the lower part are adapted to the structure and size of the metal corner box 2. The lower part of the locking pin press head 7 passes through the through hole 14 near the disconnection seam 13 in a direction perpendicular to the horizontal plane and is used to abut against the corresponding metal corner box 2. The locking pin press head 7 is made of metal.

[0067] The present invention also provides a ceramic matrix composite material 2D wound shaft reinforcement test method, using the above-mentioned ceramic matrix composite material 2D wound shaft reinforcement test tool, the ceramic matrix composite material 2D wound shaft reinforcement structure of the present invention is reinforced and tested, comprising the following steps:

[0068] Step 1) Insert the 2D winding shaft reinforcement structure into the protective sleeve 6 and rotate the 2D winding shaft reinforcement structure so that the position of the metal corner box 2 corresponds to the position of the through hole 14 on the protective sleeve 6;

[0069] Step 2) Install the protective cover 6 with the 2D winding shaft reinforcement structure into the arc-shaped groove of the base 3. Rotate the protective cover 6 so that the positions of the two through holes 14 therein correspond to the positions of the two positioning pin holes on the base 3. Install the first positioning pin 4 and the second positioning pin 5, and make the front ends of the first positioning pin 4 and the second positioning pin 5 respectively abut the inner wall of the metal corner box 2;

[0070] Step 3) Place the structure assembled in step 2) on the static test bench, install the locking pin press head 7, insert the lower end of the locking pin press head 7 into the through hole 14 and abut against the corresponding metal corner box 2, as shown in the figure. Figure 5 As shown;

[0071] Step 4) Apply pressure to the locking pin pressure head 7 and perform a static test to obtain a compression load-compression displacement curve, such as Figure 10 As shown, the ceramic matrix composite material 2D winding shaft reinforcement test was completed.

[0072] The advantages of the structure of the present invention are further illustrated below by comparing two comparative examples of existing ceramic matrix composite 2D wound shaft reinforcement structures with an embodiment of the ceramic matrix composite 2D wound shaft reinforcement structure of the present invention.

[0073] Comparative Example 1

[0074] The ceramic matrix composite material 2D winding shaft reinforcement structure used in this comparative example is different from the ceramic matrix composite material 2D winding shaft reinforcement structure embodiment of the present invention in that the retaining groove is filled with an L-shaped composite material that matches its shape and size, such as Figure 8 As shown, the rest of the structure is the same.

[0075] The ceramic matrix composite material 2D winding shaft reinforcement structure was tested under the same test conditions as in the embodiment of the present invention. The compression load-compression displacement curve obtained by the test is shown in FIG. Figure 11 shown.

[0076] Comparative Example 2

[0077] The ceramic matrix composite material 2D winding shaft reinforcement structure used in this comparative example is different from the ceramic matrix composite material 2D winding shaft reinforcement structure embodiment of the present invention in that no reinforcement structure is installed in the stop groove, such as Figure 9 As shown, the rest of the structure is the same.

[0078] The ceramic matrix composite material 2D winding shaft reinforcement structure was tested under the same test conditions as in the embodiment of the present invention. The compression load-compression displacement curve obtained by the test is shown in FIG. Figure 12 shown.

[0079] The following table shows the maximum compression displacement and maximum compression load obtained for the embodiment of the present invention, comparative example 1 and comparative example 2:

[0080] 2D winding axis Maximum compression displacement (mm) Maximum compression load (kN) Example 2.012 27.093 Comparative Example 1 1.628 15.600 Comparative Example 2 3.794 6.214

[0081] The results in the table above show that the order of compressive load, from highest to lowest, is: metal corner box reinforcement > L-shaped composite reinforcement > no reinforcement. Furthermore, the maximum compressive load of the CMC 2D wound shaft reinforced with metal corner boxes is four times greater than that of the unreinforced CMC 2D wound shaft. This indicates that metal corner box reinforcement significantly improves the retaining capacity of the CMC 2D wound shaft's retaining groove.

[0082] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A ceramic matrix composite material 2D wound shaft reinforcement test fixture, used for reinforcement testing of a ceramic matrix composite material 2D wound shaft reinforcement structure, the ceramic matrix composite material 2D wound shaft reinforcement structure comprising a cylindrical 2D wound shaft (1) with two ends through, the 2D wound shaft (1) being a ceramic matrix composite material, and having three retaining grooves of the same size and structure and extending axially and evenly distributed circumferentially on its outer wall, the retaining grooves being a V-shaped structure and comprising three metal corner boxes (2); The metal corner box (2) is arranged in the retaining groove; The metal corner box (2) includes a first side plate (8), a second side plate (9) connected to the side of the first side plate (8), and two end plates (10) respectively arranged at the two ends of the first side plate (8) and the second side plate (9); the angle between the first side plate (8) and the second side plate (9) is the same as the angle between the two side walls of the retaining groove, and the outer sides of the first side plate (8) and the second side plate (9) are respectively fixed on the two side walls of the retaining groove, and the outer edges of the first side plate (8) and the second side plate (9) are respectively flush with the outer sides of the 2D winding shaft (1); the outer sides of the two end plates (10) are fixed to the two end walls of the retaining groove, and the outer edges of the two end plates (10) are flush with the outer sides of the 2D winding shaft (1); flush here means that the outer edges of the first side plate (8), the second side plate (9) and the two end plates (10) are consistent with the shape of the outer sides of the 2D winding shaft (1); Its characteristics are: It comprises a base (3), a first positioning pin (4), a second positioning pin (5), a protective cover (6) and a locking pin pressure head (7); The length and inner diameter of the protective sleeve (6) are respectively adapted to the length and outer diameter of the 2D winding shaft (1), and is used to be sleeved on the outer surface of the 2D winding shaft (1); the protective sleeve (6) is provided with through holes (14) respectively corresponding to the three retaining grooves of the 2D winding shaft (1), and a disconnection seam (13) provided at the top and extending in the axial direction; The length of the base (3) is adapted to the length of the protective sleeve (6), and an arc-shaped groove is provided on the base (3), the opening of the arc-shaped groove faces upward, and the inner surface of the arc-shaped groove is adapted to the outer surface of the protective sleeve (6), and the protective sleeve (6) is arranged in the arc-shaped groove; the end surfaces on both sides of the opening of the arc-shaped groove are respectively a high end surface (11) and a low end surface (12), the height of the high end surface (11) is higher than the axis of the protective sleeve (6), and the height of the low end surface (12) is lower than the axis of the protective sleeve (6); the three through holes (14) of the protective sleeve (6), one of which is located between the disconnection seam (13) and the low end surface (12) and is arranged close to the disconnection seam (13); The base (3) is further provided with two positioning pin holes corresponding to the other two through holes (14) on the protective cover (6), respectively used for inserting the first positioning pin (4) and the second positioning pin (5); The outer profile and dimensions of the front ends of the first positioning pin (4) and the second positioning pin (5) are adapted to the inner profile and dimensions of the metal corner box (2); the first positioning pin (4) and the second positioning pin (5) respectively pass through the corresponding positioning pin holes and through holes (14) in sequence, and are used to abut against the metal corner box (2); The structure and size of the upper portion of the locking pin press head (7) are adapted to the mounting end of the static test equipment and are used to apply pressure; the structure and size of the lower portion are adapted to the structure and size of the metal corner box (2), and the lower portion of the locking pin press head (7) passes through the through hole (14) near the disconnection seam (13) in a direction perpendicular to the horizontal plane and is used to abut against the corresponding metal corner box (2).

2. The ceramic matrix composite material 2D winding shaft reinforcement test fixture according to claim 1, characterized in that: The metal corner box (2) is made of high-temperature alloy.

3. A ceramic matrix composite material 2D winding shaft reinforcement test fixture according to claim 1 or 2, characterized in that: The two end plates (10) of the metal corner box (2) are connected to the first side plate (8) in a circular arc transition and are connected to the second side plate (9) in a right angle.

4. The ceramic matrix composite material 2D winding shaft reinforcement test fixture according to claim 3, characterized in that: The outer side walls of the first side plate (8) and the second side plate (9) are respectively adhered to the two side walls of the retaining groove by means of high-temperature glue, and the outer side walls of the two end plates (10) are respectively adhered to the two end walls of the retaining groove by means of high-temperature glue.

5. The ceramic matrix composite material 2D winding shaft reinforcement test fixture according to claim 4, characterized in that: The angle between the two side walls of the retaining groove extending in the axial direction is 95°-110°, the side opposite to the angle is an opening, the opening faces the outer side wall of the 2D winding shaft (1), the length is less than the length of the 2D winding shaft (1), and the depth of the retaining groove in the radial direction is consistent with the wall thickness of the 2D winding shaft (1); The two ends of the retaining groove are equidistant from the two ends of the ceramic matrix composite material 2D winding axis (1); The thickness of the first side plate (8), the second side plate (9) and the two end plates (10) is 1.5-2 mm.

6. The ceramic matrix composite material 2D winding shaft reinforcement test fixture according to claim 1, characterized in that: The 2D winding shaft reinforcement structure is prepared by the following steps: 1) Processing the 2D winding shaft (1) blank according to preset size requirements, so that the 2D winding shaft (1) blank is cylindrical with both ends penetrated; 2) processing three retaining grooves of the same size and structure on the outer wall of the 2D winding shaft (1) blank processed in step 1) and extending in the axial direction and evenly distributed in the circumferential direction; 3) According to the size and structure of the retaining groove, three metal corner boxes (2) are obtained by processing; 4) applying adhesive to the outer side walls of the first side plate (8), the second side plate (9) and the two end plates (10) of the metal corner box (2); 5) The three metal corner boxes (2) are respectively embedded and fixed in the retaining grooves, ensuring that the outer edges of the first side plate (8), the second side plate (9) and the two end plates (10) are flush with the outer side walls of the 2D winding shaft (1), thereby obtaining a 2D winding shaft reinforcement structure.

7. The ceramic matrix composite material 2D winding shaft reinforcement test fixture according to claim 6, characterized in that: In step 4), the adhesive is a high temperature glue; Step 4) also includes applying high-temperature glue on the inner side walls of the retaining groove.

8. The ceramic matrix composite material 2D winding shaft reinforcement test fixture according to claim 1, characterized in that: The width of the disconnection seam (13) is 3-5 mm; The protective cover (6) is made of nylon.

9. A ceramic matrix composite material 2D winding shaft reinforcement test method, using the ceramic matrix composite material 2D winding shaft reinforcement test tool according to any one of claims 1 to 8, characterized in that: The following steps are involved: Step 1) inserting the 2D winding shaft reinforcement structure into the protective sleeve (6), and rotating the 2D winding shaft reinforcement structure so that the position of the metal corner box (2) corresponds to the position of the through hole (14) on the protective sleeve (6); Step 2) Install the protective cover (6) equipped with the 2D winding shaft reinforcement structure into the arc-shaped groove of the base (3), rotate the protective cover (6) so that the positions of the two through holes (14) therein correspond to the positions of the two positioning pin holes on the base (3), install the first positioning pin (4) and the second positioning pin (5), and respectively make the front ends of the first positioning pin (4) and the second positioning pin (5) abut against the inner wall of the metal corner box (2); Step 3) Place the structure assembled in step 2) on a static test workbench, install the locking pin press head (7), insert the lower end of the locking pin press head (7) into the through hole (14) and abut against the corresponding metal corner box (2); Step 4) Apply pressure to the locking pin pressure head (7) to perform a static test to obtain a compression load-compression displacement curve, thereby completing the ceramic matrix composite material 2D winding shaft reinforcement test.

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