Heat insulation device for brake disc
By combining the design of annular pressure plate and limiting components with annular honeycomb heat insulation plate, the problems of poor wear resistance and insufficient structural strength of traditional brake disc heat insulation pads are solved, achieving efficient heat insulation and structural stability, and meeting the requirements of high safety and reliability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- YOUCAITEC MATERIAL CO LTD
- Filing Date
- 2025-06-20
- Publication Date
- 2026-04-28
AI Technical Summary
Traditional brake discs have poor wear resistance, insufficient heat insulation and structural strength in their heat insulation pads, which cannot meet the requirements for high safety and reliability.
A rigid integral structure is formed by using an annular pressure plate and limiting components, combined with an annular honeycomb insulation plate and limiting components. The honeycomb structure improves the insulation performance and strength, and the limiting components prevent the insulation plate from sliding or warping.
It effectively prevents heat transfer, improves heat insulation, enhances structural stability and wear resistance, and ensures the safe and reliable operation of the brake disc.
Smart Images
Figure CN224174453U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of brake disc technology, and in particular to a heat insulation device for brake discs. Background Technology
[0002] During the operation of high-energy braking systems in aircraft and special vehicles, brake discs generate a large amount of heat during braking. If this heat is not isolated in time, it can damage surrounding components and affect the normal operation and service life of the equipment. The high temperature of aircraft brake discs may cause hydraulic system failures, while the heat from brake discs in special vehicles may affect tire performance and vehicle handling stability.
[0003] Traditional heat insulation pads are directly connected to other structures within the brake disc. Over long-term use, these pads are prone to detachment and wear, which is detrimental to the stable operation of the brake disc. Furthermore, traditional heat insulation pads are insufficient in terms of heat insulation performance and structural strength, failing to meet the stringent safety and reliability requirements of applications such as aircraft and special vehicles. Utility Model Content
[0004] (I) Purpose of the utility model
[0005] The purpose of this invention is to provide a heat insulation device for brake discs, which aims to solve the problems of poor wear resistance, insufficient heat insulation effect and structural strength of the heat insulation pads in traditional brake discs.
[0006] (II) Technical Solution
[0007] To address the aforementioned problems, this utility model provides a heat insulation device for brake discs, comprising a pressure-bearing component, a heat insulation component, and a limiting component;
[0008] The pressure-bearing component includes a first pressure-bearing plate and a second pressure-bearing plate, which are annular structures. The heat insulation component includes a heat insulation plate, which is an annular honeycomb structure. The first surface of the heat insulation plate abuts against the first pressure-bearing plate, and the second surface of the heat insulation plate abuts against the second pressure-bearing plate. The limiting component is fixedly connected to the first pressure-bearing plate and the second pressure-bearing plate, and abuts against the side of the heat insulation plate.
[0009] Preferably, the heat insulation component further includes a heat insulation part disposed within the honeycomb cells of the heat insulation plate.
[0010] Preferably, the limiting component includes a plurality of first limiting parts, the plurality of first limiting parts being fixedly connected to the first pressure plate and the plurality of first limiting parts being fixedly connected to the second pressure plate, and the plurality of first limiting parts being evenly distributed along the outer ring side of the heat insulation plate.
[0011] Preferably, the limiting component further includes a plurality of second limiting parts, which are fixedly connected to the first pressure plate and the second pressure plate, and are evenly distributed along the inner ring side of the heat insulation plate.
[0012] Preferably, the plurality of first limiting portions and the plurality of second limiting portions are arranged alternately along the radial direction of the heat insulation plate.
[0013] Preferably, the first limiting part and the second limiting part are arc-shaped structures, the first limiting part is attached to the outer ring side of the heat insulation plate, and the second limiting part is attached to the inner ring side of the heat insulation plate.
[0014] Preferably, the first bearing plate has a first elastic groove, which is uniformly distributed along the outer circumferential direction of the first bearing plate, and the second bearing plate has a second elastic groove, which is uniformly distributed along the outer circumferential direction of the second bearing plate.
[0015] Preferably, the first bearing plate has a third elastic groove, which is uniformly distributed along the inner circumferential direction of the first bearing plate, and the second bearing plate has a fourth elastic groove, which is uniformly distributed along the inner circumferential direction of the second bearing plate.
[0016] Preferably, the first elastic groove corresponds to the second elastic groove, and the third elastic groove corresponds to the fourth elastic groove.
[0017] Preferably, the first elastic groove and the third elastic groove are arranged alternately along the radial direction of the first pressure plate, and the second elastic groove and the fourth elastic groove are arranged alternately along the radial direction of the second pressure plate.
[0018] (III) Beneficial Effects
[0019] The above-mentioned technical solution of this utility model has the following beneficial technical effects:
[0020] 1. The first and second pressure plates are set as annular structures to fit the brake disc structure. Through the pressure-bearing components and limiting components, the heat insulation components are limited on both sides and in the circumference, so that the pressure-bearing components, heat insulation components and limiting components form a rigid whole to prevent the heat insulation plate from sliding or warping during braking, such as the high-frequency vibration during aircraft braking. The limiting components can firmly fix the heat insulation plate to prevent it from separating from the pressure-bearing components.
[0021] 2. The honeycomb structure of the heat insulation panel ensures the overall strength of the heat insulation panel, enabling it to withstand greater pressure and impact. On the other hand, it provides excellent heat insulation performance, effectively preventing heat transfer from the brake disc to surrounding components and greatly improving the heat insulation effect. Attached Figure Description
[0022] Figure 1 This is a schematic diagram of the overall structure of a heat insulation device for brake discs according to the present invention;
[0023] Figure 2 yes Figure 1 Cross-sectional view of AA;
[0024] Figure 3 This is a structural schematic diagram of a heat insulation component according to one embodiment of the present invention;
[0025] Figure 4 This is a structural schematic diagram of a pressure-bearing component according to one embodiment of the present invention.
[0026] List of reference numerals in the attached diagram:
[0027] 1. Pressure-bearing component; 1a. Connection hole;
[0028] 11. First bearing plate; 11a. First elastic groove; 11b. Third elastic groove;
[0029] 12. Second bearing plate; 12a. Second elastic groove; 12b. Fourth elastic groove;
[0030] 2. Thermal insulation components; 21. Thermal insulation panels; 22. Thermal insulation parts;
[0031] 3. Limiting component; 31. First limiting part; 32. Second limiting part. Detailed Implementation
[0032] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be understood that these descriptions are merely exemplary and not intended to limit the scope of this utility model. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of this utility model.
[0033] The accompanying drawings show schematic diagrams of layer structures according to embodiments of the present invention. These drawings are not to scale, and some details have been enlarged for clarity, and some details may have been omitted. The shapes of the various regions and layers shown in the drawings, as well as their relative sizes and positional relationships, are merely exemplary and may deviate from reality due to manufacturing tolerances or technical limitations. Furthermore, those skilled in the art can design regions / layers with different shapes, sizes, and relative positions as needed.
[0034] Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.
[0035] In the description of this utility model, it should be noted that the terms "first", "second", "third" and "fourth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0036] Combination Figures 1 to 4 This utility model provides a heat insulation device for brake discs, including a pressure-bearing component 1, a heat insulation component 2, and a limiting component 3. The pressure-bearing component 1 includes a first pressure plate 11 and a second pressure plate 12, which are annular structures. The heat insulation component 2 includes a heat insulation plate 21, which is an annular honeycomb structure. The first surface of the heat insulation plate 21 abuts against the first pressure plate 11, and the second surface of the heat insulation plate 21 abuts against the second pressure plate 12. The limiting component 3 is fixedly connected to the first pressure plate 11 and the second pressure plate 12, and abuts against the side of the heat insulation plate 21.
[0037] Specifically, the pressure-bearing component 1 consists of an annular first pressure-bearing plate 11 and a second pressure-bearing plate 12, used to withstand the mechanical impact and heat radiation of the brake disc. The first pressure-bearing plate 11 and the second pressure-bearing plate 12 are arranged on both sides of the heat insulation component 2 to ensure uniform load distribution. The heat insulation component 2 uses an annular honeycomb heat insulation plate 21 as the core heat insulation layer. The heat insulation plate 21 is collinear with the circles of the first pressure-bearing plate 11 and the second pressure-bearing plate 12. The first surface of the heat insulation plate 21 abuts against the first pressure-bearing plate 11 and the second surface abuts against the second pressure-bearing plate 12. 12. A layered structure is formed to further reduce heat transfer; the limiting component 3 is fixedly connected to the first pressure plate 11 and the second pressure plate 12, and abuts against the side of the heat insulation plate 21. The side of the heat insulation plate 21 here specifically refers to the outer ring side and / or inner ring side of the annular heat insulation plate 21. The limiting component 3 realizes the radial constraint of the heat insulation plate 21, restricts the displacement of the heat insulation plate 21, such as radial sliding caused by centrifugal force, and ensures the relative position stability of the heat insulation plate 21, the first pressure plate 11 and the second pressure plate 12.
[0038] With this configuration, the first pressure plate 11 and the second pressure plate 12 are set as annular structures to fit the brake disc structure. Through the pressure-bearing component 1 and the limiting component 3, the heat insulation component 2 is limited on both sides and in the circumference, so that the pressure-bearing component 1, the heat insulation component 2 and the limiting component 3 form a rigid whole, preventing the heat insulation plate 21 from sliding or warping during braking, such as the high-frequency vibration during aircraft braking. The limiting component 3 can firmly fix the heat insulation plate 21 and prevent it from detaching from the pressure-bearing component 1. The honeycomb structure of the heat insulation plate 21 can, on the one hand, ensure the overall structural strength of the heat insulation plate 21, so that the heat insulation plate 21 can withstand greater pressure and impact; on the other hand, it can provide good heat insulation performance, effectively preventing the transfer of heat from the brake disc to the surrounding components, and greatly improving the heat insulation effect.
[0039] It should be noted that the specific dimensions of the annular structures of the first pressure plate 11, the second pressure plate 12, and the heat insulation plate 21 are not limited here, and can be adapted according to the specific structure of the brake disc. In a preferred embodiment, the first pressure plate 11 and the second pressure plate 12 have identical structures and are symmetrically arranged with respect to the heat insulation plate 21. The annular section of the heat insulation plate 21 is located within the annular section of the first pressure plate 11 and the second pressure plate 12, that is, the annular portion of the heat insulation plate 21 is located between the annular portions of the first pressure plate 11 and the second pressure plate 12. With this arrangement, the heat insulation plate 21 is completely positioned between the first pressure plate 11 and the second pressure plate 12, and both sides of the heat insulation plate 21 are covered by the first pressure plate 11 and the second pressure plate 12 respectively, ensuring the heat insulation effect and protecting the heat insulation plate 21.
[0040] In a preferred embodiment, the heat insulation component 2 further includes a heat insulation portion 22 disposed within the honeycomb cells of the heat insulation plate 21. Specifically, the heat insulation portion 22 fills the honeycomb cells of the heat insulation plate 21 to enhance the heat insulation effect. The honeycomb air cavity itself is a low thermal conductivity medium, and the filling heat insulation material, such as ceramic aerogel or high-temperature resistant sol, further reduces the heat conduction efficiency within the cell.
[0041] By using this configuration, the geometric insulation of the honeycomb extends the heat transfer path, while the low thermal conductivity of the insulation part 22 blocks heat conduction, significantly reducing the heat flow penetration capability. After the insulation part 22 is filled, the mechanical strength of the honeycomb cell is improved, which can help bear the load transmitted by the pressure-bearing component 1 and prevent the honeycomb structure from collapsing due to pressure, such as the high pressure when a heavy vehicle brakes. The filled insulation part 22 can support the honeycomb wall of the insulation board 21, prevent deformation, and improve the overall stability of the insulation device.
[0042] In a preferred embodiment, the limiting component 3 includes a plurality of first limiting portions 31, which are fixedly connected to the first pressure plate 11 and the second pressure plate 12, and are evenly distributed along the outer ring side of the heat insulation plate 21. Specifically, the first limiting portions 31 are evenly distributed along the outer ring side of the heat insulation plate 21 and are fixedly connected to the first pressure plate 11 and the second pressure plate 12 to form an outer ring limiting structure for the heat insulation plate 21, preventing the heat insulation plate 21 from sliding outward due to centrifugal force.
[0043] With this configuration, the evenly distributed first limiting parts 31 ensure that the heat insulation plate 21 is subjected to balanced force in the outer circumference, avoiding local compression deformation. For example, during high-speed braking, centrifugal force attempts to throw the heat insulation plate 21 outward, and the first limiting parts 31 can simultaneously resist the thrust at each point in the circumference, keeping the center position of the heat insulation plate 21 unchanged. The evenly distributed layout along the outer circumference of the heat insulation plate 21 facilitates batch processing and installation, reduces the impact of assembly errors on the position of the heat insulation plate 21, and improves the versatility of the first limiting parts 31.
[0044] In a preferred embodiment, the limiting assembly 3 further includes a plurality of second limiting portions 32, which are fixedly connected to the first pressure plate 11 and the second pressure plate 12, and are evenly distributed along the inner ring side of the heat insulation plate 21. Specifically, the second limiting portions 32 are evenly distributed along the inner ring side of the heat insulation plate 21 and are fixedly connected to the first pressure plate 11 and the second pressure plate 12 to form an inner ring limiting structure of the heat insulation plate 21, preventing the heat insulation plate 21 from sliding inward due to braking contraction or expansion.
[0045] With this configuration, the first limiting part 31 and the second limiting part 32 cooperate to achieve radial bidirectional limiting of the heat insulation plate 21. Regardless of centrifugal force or central tension, the movement of the heat insulation plate 21 relative to the first pressure plate 11 and the second pressure plate 12 can be effectively restricted. For example, when the vehicle brakes suddenly, the central area of the brake disc contracts, and the second limiting part 32 can prevent the heat insulation plate 21 from shrinking inward, keeping the heat insulation plate 21 in close contact with the first pressure plate 11 and the second pressure plate 12. The uniform layout of the inner and outer rings improves the overall mechanical symmetry of the device, reduces deformation caused by off-center loading, and further improves the overall stability of the heat insulation device.
[0046] It should be noted that the specific positions of the first limiting part 31 and the second limiting part 32 are not limited here. They are evenly distributed along the outer and inner ring sides of the heat insulation plate 21, respectively. The first limiting part 31 and the second limiting part 32 can be arranged correspondingly along the radial direction of the heat insulation plate 21, or they can be arranged alternately along the radial direction of the heat insulation plate 21, as long as the limiting of the heat insulation plate 21 is achieved. In a preferred embodiment, multiple first limiting parts 31 and multiple second limiting parts 32 are arranged alternately along the radial direction of the heat insulation plate 21. Specifically, the first limiting parts 31 and the second limiting parts 32 are offset along the radial direction of the heat insulation plate 21 to improve the circumferential constraint of the heat insulation plate 21. (Stress distribution is uniform.)
[0047] With this arrangement, the staggered layout fills the blank areas of the circumferential constraint, so that multiple positions of the heat insulation plate 21 are indirectly constrained by the limiting components 3. For example, the gap between the first limiting parts 31 is constrained by the radially adjacent second limiting parts 32, realizing continuous circumferential constraint and preventing the heat insulation plate 21 from circumferentially torturing at the gap. After the first limiting parts 31 and the second limiting parts 32 are radially staggered, the fixing stress of the first limiting parts 31 and the second limiting parts 32 is also dispersed radially, avoiding structural deformation or damage caused by concentrated force on the first bearing plate 11 and the second bearing plate 12 at the same radial position.
[0048] It should be noted that the specific structure of the first limiting part 31 and the second limiting part 32 is not limited here, as long as they can be fixed with the first pressure plate 11 and the second pressure plate 12 and achieve radial limiting of the heat insulation plate 21. In a preferred embodiment, the first limiting part 31 and the second limiting part 32 are arc-shaped structures. The first limiting part 31 is fitted to the outer ring side of the heat insulation plate 21, and the second limiting part 32 is fitted to the inner ring side of the heat insulation plate 21. Specifically, the first limiting part 31 fits the arc-shaped contour of the outer ring side of the heat insulation plate 21, and the second limiting part 32 fits the arc-shaped contour of the inner ring side, increasing the contact area between the limiting part and the heat insulation plate 21 through curved surface contact. Excellent structural adaptability:
[0049] With this design, the curved surface fits perfectly against the side of the heat insulation plate 21, distributing the limiting force over a longer contact area. For example, the impact force during braking is evenly transmitted to the side of the heat insulation plate 21 through the curved surface, preventing excessive local pressure from causing damage to the honeycomb wall. The curved shape naturally adapts to the geometry of the annular heat insulation plate 21, simplifying processing and assembly. No additional cutting is required on the side of the heat insulation plate 21, maintaining the integrity of the honeycomb structure and improving the compatibility of the first limiting part 31, the second limiting part 32, and the heat insulation plate 21, thereby enhancing the limiting effect on the heat insulation plate 21.
[0050] It should be noted that the specific structure of the first bearing plate 11 and the second bearing plate 12 is not limited here. In a preferred embodiment, the first bearing plate 11 has a first elastic groove 11a, which is uniformly distributed along the outer circumferential direction of the first bearing plate 11. The second bearing plate 12 has a second elastic groove 12a, which is uniformly distributed along the outer circumferential direction of the second bearing plate 12. Specifically, the first elastic groove 11a and the second elastic groove 12a are uniformly opened along the outer circumferential direction of the first bearing plate 11 and the second bearing plate 12, respectively. The first elastic groove 11a and the second elastic groove 12a allow the first bearing plate 11 and the second bearing plate 12 to undergo elastic deformation during circumferential thermal expansion or under stress, thereby releasing stress.
[0051] With this design, the circumferentially distributed elastic grooves provide a controllable deformation path for the pressure plate. For example, when the brake disc is hot, the outer side of the pressure plate expands. The elastic grooves absorb the expansion by slightly opening, preventing the pressure plate from warping as a whole and improving the stress buffering capacity of the pressure plate. The elastic grooves disperse concentrated stress into local deformation, reducing fatigue cracks caused by cyclic loads, such as frequent braking, and improving the fatigue resistance of the pressure plate.
[0052] In a preferred embodiment, the first pressure plate 11 has a third elastic groove 11b, which is uniformly distributed along the inner circumferential direction of the first pressure plate 11. The second pressure plate 12 has a fourth elastic groove 12b, which is uniformly distributed along the inner circumferential direction of the second pressure plate 12. Specifically, the third elastic groove 11b and the fourth elastic groove 12b are uniformly arranged along the inner circumferential direction of the first pressure plate 11 and the second pressure plate 12, respectively, and cooperate with the outer first elastic groove 11a and the outer second elastic groove 12a to form inner and outer double deformation zones of the first pressure plate 11 and the second pressure plate 12.
[0053] With this design, the inner and outer elastic grooves work together to make the thermal expansion and contraction or stress deformation of the pressure plate more uniform. For example, the temperature difference between the center and the edge of the brake disc causes the inner and outer sides of the pressure plate to expand asynchronously. The inner and outer elastic grooves absorb the deformation respectively, avoiding the distortion of the plate surface and realizing the full-area deformation buffer of the pressure plate. The axially uniformly arranged elastic grooves improve the mechanical balance of the pressure plate and reduce the misalignment of the stacked structure caused by unilateral deformation.
[0054] It should be noted that the specific arrangement of the first pressure plate 11 and the second pressure plate 12 relative to the heat insulation plate 21 is not limited here. The elastic grooves on the first pressure plate 11 and the second pressure plate 12 can be arranged alternately or correspondingly. In a preferred embodiment, the first elastic groove 11a corresponds to the second elastic groove 12a, and the third elastic groove 11b corresponds to the fourth elastic groove 12b. Specifically, the first elastic groove 11a and the second elastic groove 12a are aligned, and the third elastic groove 11b and the fourth elastic groove 12b are aligned to ensure that the deformation of the first pressure plate 11 and the second pressure plate 12 is synchronous and in the same direction. For example, when the first pressure plate 11 is subjected to force, the first elastic groove 11a contracts, and at this time, the corresponding second elastic groove 12a on the second pressure plate 12 also contracts synchronously.
[0055] With this setup, the elastic grooves at the corresponding positions allow the deformation of the pressure plate to be completely synchronized. For example, during thermal expansion, the outer grooves of the upper and lower plates open simultaneously, and the heat insulation plate 21 is only subjected to uniform axial compression without shear force, thus protecting the structural integrity of the heat insulation component 2. At the same time, the corresponding positions can serve as an assembly reference, simplifying the alignment operation during installation and improving the assembly accuracy and efficiency of the overall structure.
[0056] In a preferred embodiment, the first elastic groove 11a and the third elastic groove 11b are arranged radially staggered along the first pressure plate 11, and the second elastic groove 12a and the fourth elastic groove 12b are arranged radially staggered along the second pressure plate 12. Specifically, the first elastic groove 11a and the third elastic groove 11b are radially offset on the first pressure plate 11, and the second elastic groove 12a and the fourth elastic groove 12b are radially offset on the second pressure plate 12.
[0057] With this configuration, the radially staggered elastic grooves distribute the deformation requirements of the pressure plate to different radius areas. For example, the pressure during braking is gradually relieved through the deformation of the outer and inner grooves, avoiding concentrated stress in the middle area of the pressure plate. The deformation space with full radial coverage allows the pressure plate to remain flat under complex loads. For example, during high-speed braking, the inner and outer sides of the pressure plate deform synchronously in the circumferential direction, and the plate surface is free from wavy twisting, ensuring a tight fit with the heat insulation plate 21.
[0058] It should be noted that the specific method of fixing the heat insulation device to the brake disc is not limited here. The appropriate position for installing and fixing the heat insulation device is selected according to the structure and layout requirements of the brake disc. In an optional case, the first pressure plate 11 and the second pressure plate 12 are provided with connecting holes 1a, through which the first pressure plate 11 and the second pressure plate 12 are fixedly connected to the brake disc.
[0059] It should be understood that the specific embodiments described above are merely illustrative or explanatory of the principles of this utility model and do not constitute a limitation thereof. Therefore, any modifications, equivalent substitutions, improvements, etc., made without departing from the spirit and scope of this utility model should be included within its protection scope. Furthermore, the appended claims are intended to cover all variations and modifications falling within the scope and boundaries of the appended claims, or equivalent forms of such scope and boundaries.
Claims
1. A heat insulation device for brake discs, characterized in that, The heat insulation device includes a pressure-bearing component (1), a heat insulation component (2), and a limiting component (3); The pressure-bearing component (1) includes a first pressure-bearing plate (11) and a second pressure-bearing plate (12), the first pressure-bearing plate (11) and the second pressure-bearing plate (12) having an annular structure. The heat insulation component (2) includes a heat insulation plate (21), the heat insulation plate (21) having an annular honeycomb structure. The first surface of the heat insulation plate (21) abuts against the first pressure-bearing plate (11), the second surface of the heat insulation plate (21) abuts against the second pressure-bearing plate (12), the limiting component (3) is fixedly connected to the first pressure-bearing plate (11), the limiting component (3) is fixedly connected to the second pressure-bearing plate (12), and the limiting component (3) abuts against the side of the heat insulation plate (21).
2. The heat insulation device according to claim 1, characterized in that, The heat insulation component (2) further includes a heat insulation part (22), which is disposed within the honeycomb cell of the heat insulation plate (21).
3. The heat insulation device according to claim 1, characterized in that, The limiting component (3) includes a plurality of first limiting parts (31), which are fixedly connected to the first pressure plate (11) and the second pressure plate (12). The plurality of first limiting parts (31) are evenly distributed along the outer ring side of the heat insulation plate (21).
4. The heat insulation device according to claim 3, characterized in that, The limiting component (3) further includes a plurality of second limiting parts (32), which are fixedly connected to the first pressure plate (11) and the second pressure plate (12), and are evenly distributed along the inner ring side of the heat insulation plate (21).
5. The heat insulation device according to claim 4, characterized in that, The plurality of first limiting parts (31) and the plurality of second limiting parts (32) are arranged alternately along the radial direction of the heat insulation plate (21).
6. The heat insulation device according to claim 5, characterized in that, The first limiting part (31) and the second limiting part (32) are arc-shaped structures. The first limiting part (31) is attached to the outer ring side of the heat insulation plate (21), and the second limiting part (32) is attached to the inner ring side of the heat insulation plate (21).
7. The heat insulation device according to claim 1, characterized in that, The first pressure plate (11) has a first elastic groove (11a) which is evenly distributed along the outer circumferential direction of the first pressure plate (11). The second pressure plate (12) has a second elastic groove (12a) which is evenly distributed along the outer circumferential direction of the second pressure plate (12).
8. The heat insulation device according to claim 7, characterized in that, The first pressure plate (11) has a third elastic groove (11b) which is evenly distributed along the inner circumferential direction of the first pressure plate (11). The second pressure plate (12) has a fourth elastic groove (12b) which is evenly distributed along the inner circumferential direction of the second pressure plate (12).
9. The heat insulation device according to claim 8, characterized in that, The first elastic groove (11a) corresponds to the second elastic groove (12a) in position, and the third elastic groove (11b) corresponds to the fourth elastic groove (12b) in position.
10. The heat insulation device according to claim 9, characterized in that, The first elastic groove (11a) and the third elastic groove (11b) are arranged alternately along the radial direction of the first pressure plate (11), and the second elastic groove (12a) and the fourth elastic groove (12b) are arranged alternately along the radial direction of the second pressure plate (12).