CN111396474A - A high-speed train brake pad with optimized friction particle combination and installation method - Google Patents

Abstract

The invention belongs to the technical field of friction braking, and particularly relates to a high-speed train brake pad with optimized friction particle combination and installation mode. The problems of single shape of friction particles, eccentric wear, high braking noise and uneven heat distribution of a braking interface on the conventional brake pad are solved. The technical scheme of the invention is as follows: the idea of combining friction particles of different shapes and materials is provided, and the friction particles of various shapes and materials are flexibly arranged in different areas, so that the advantages of the friction particles of various shapes and materials are comprehensively utilized; optimizing the fixing mode of the friction particles; the rotation prevention mode of the friction particles is optimized, and the guide shaft and the mounting hole are optimized to be cylindrical with non-circular cross-sectional shapes. The invention organically combines the advantages of friction particles with different shapes and materials, and improves the reliability, safety and comfort of the brake system.

Description

A high-speed train brake pad with optimized friction particle combination and installation method

technical field

The invention belongs to the technical field of friction braking, and in particular relates to a high-speed train brake pad for optimizing the combination and installation of friction particles.

Background technique

High-speed trains usually use disc brakes. The brake disc is installed on the axle or on the side of the wheel spokes, and the two brake pads are pressed against the brake disc with the brake caliper, and the friction generates a braking force to stop the train. This braking method can greatly reduce the thermal load and mechanical wear of the wheel tread because the force is not on the wheel tread. In addition, the friction area of the disc brake is large, the braking is stable, and the braking effect is good. With the rapid development of the national economy, the running speed of high-speed trains is increasing day by day, constantly breaking through the maximum operating speed, which puts forward more stringent requirements for the safety and reliability of the braking system; Comfort is also a growing concern. Therefore, the optimal design for the safety, reliability and comfort of brake pads has great practical application significance in engineering.

At present, the brake pads in the braking system mostly use friction particles of the same shape, such as hexagonal friction particles and circular friction particles. However, existing research has shown that friction particles of different shapes have obvious differences in various manifestations of braking performance. Therefore, simply using friction particles of one shape cannot make the brake pad structure meet various performance requirements.

The optimization scheme of the existing braking system rarely involves the arrangement of friction particles in the brake pad structure. The friction speed of the outermost layer of friction particles on the brake pad is the largest, which brings a high-intensity impact to the outermost layer of friction particles, aggravates the interface wear and crack initiation, and causes a large area of severe wear and tear. High-intensity impact will cause continuous and violent vibration at the interface, which will excite high-frequency and high-intensity screaming noise. The number of particles arranged in the outermost layer is also larger, resulting in the largest contact area between this area and the brake disc. Compared with the inner layer, the grinding time is greatly prolonged. If non-circular friction particles are still used here, it will greatly affect the wear characteristics and contact pressure distribution on the surface of the friction particles, aggravate the wear, cause serious stress concentration, and cause high-frequency screaming during the braking process of the train. Noise, and lead to local high temperature phenomenon on the surface of friction particles, which seriously affects the operation accuracy and reliability of the interface, shortens the service life of the brake pads, and reduces the stability of the braking system.

On the other hand, the influence of the arrangement of the incision end of the brake pad structure on the braking performance is not considered. In fact, the characteristics of the incision end are closely related to the characteristics of the braking interface. During the braking process, the cut-in end area of the brake pads is subjected to the impact force of the maximum energy level, which greatly destroys the surface morphology of the friction particles in this area, aggravates the interface wear and crack initiation, and causes the accumulation of wear debris and adhesion and tearing. and other phenomena, a large area of severe wear occurs, and the huge impact force will cause violent fluctuations in the interface friction, causing continuous and violent vibration at the interface, and radiating high-frequency and high-intensity brake squeal noise. At the same time, serious stress concentration occurs, which causes high-intensity vibration and noise in the braking system and local high temperature on the surface of the friction particles, which greatly affects the safety and reliability of the braking process.

As the speed class of the train continues to increase, the braking energy is relatively large. The thermal load generated at the friction interface during braking is relatively large, and the existing brake pad friction particle fixing method generally adopts rivet fixed connection and high temperature pressing. When braking, the brake pads are prone to unbalanced load distribution, which leads to vibration of the friction interface, and the effective contact area is greatly reduced, resulting in a concentrated distribution of thermal loads on the contacted surfaces and shortened service life of the brake pads. Recently, there have been brake pad structures with adjusters, such as the adjuster for train brake pads invented by Changzhou Tiema Technology Industrial Co., Ltd. (application publication number: CN101982668A), which proposes a plum-shaped adjuster, which can adjust the three Each friction particle is fixed as a whole; a foreign patent (application number: US20190024735A1) proposes a peanut-shaped adjuster, which can fix two friction particles as a whole. Under the braking conditions of high speed and high pressure, the brake pads of this type of adjuster automatically adjust each friction particle to the same plane to increase the contact area during operation. However, this type of regulator has a complex structure, which is inconvenient for the flexible installation and arrangement of friction particles, and its performance in terms of vibration reduction, noise reduction and stress distribution is relatively poor.

The above discussion illustrates the problems existing in the current braking system, which can cause severe noise pollution during the braking process of the train, and harm the physical and mental health of passengers and residents along the way. And greatly shorten the service life of the brake pads, and may even lead to braking accidents, reducing the operating efficiency and economic benefits of the train. In a word, the existing technical solutions still have certain deficiencies in the safety, reliability and comfort of train braking. Therefore, the development of a new type of high-speed rail brake pads has important engineering application significance.

SUMMARY OF THE INVENTION

In view of the problems existing in the prior art, the present invention provides a high-speed train brake pad that optimizes the combination and installation of friction particles, the purpose of which is to propose a combination of friction particles of different shapes and materials, The advantages are organically combined to ensure braking reliability and safety, prolong the service life of the brake pads, thereby reducing production and operating costs.

The technical scheme adopted in the present invention is as follows:

A high-speed train brake pad with optimized friction particle combination and installation method, comprising a brake disc, a brake pad structure and a loading device, the loading device is connected with the brake pad structure, and the brake pad structure is connected with the brake pad structure. The brake pad structure includes a brake pad back plate, and a plurality of friction particles are arranged on the brake pad back plate, and the plurality of friction particles have at least two shapes.

After adopting the technical solution, the combination structure of the friction particles of the brake pad is optimized, and several combinations of friction particles of different shapes are used, which can organically combine the advantages of the friction particles of different shapes.

Preferably, the friction particles include polygonal friction particles and circular friction particles. By combining the circular friction particles and the polygonal friction particles, the safety and reliability of the train braking can be ensured, and the noise pollution of the environment can be reduced at the same time.

Preferably, the circular friction particles are located on the outer side and/or both ends of the back plate of the brake pad, and the polygonal friction particles are located on the inner side and the middle of the back plate of the brake pad.

After adopting this preferred solution, circular friction particles are arranged at both ends of the brake pads and/or the outermost layer of the brake pads with a relatively large friction speed, which can reduce the occurrence of serious wear during the braking process as much as possible, and avoid The accumulation of wear debris improves the stability of the braking process of the system, and achieves good vibration and noise reduction effects, further extending the service life of the brake pads. The hexagonal friction particles are arranged in the middle of the brake pad with mild impact, which can avoid stress concentration to a certain extent, ensure that the friction interface is closely fitted, improve braking efficiency, reduce braking distance, and further improve the safety of high-speed trains reliability and reliability, thus ensuring the safety of passengers on their journeys.

Preferably, the constituent materials of the friction particles include at least one powder metallurgy or at least one composite material.

After adopting this preferred solution, the properties of different materials can be comprehensively utilized to improve the overall uniformity and wear resistance of the brake pad.

Preferably, the wear resistance of the friction particles decreases from the two ends of the brake pad backing plate to the middle.

After adopting the optimal solution, the advantageous properties of different materials can be comprehensively utilized, the eccentric wear phenomenon of the brake pad during operation can be effectively improved, and the service life of the brake pad can be increased.

Preferably, a mounting hole is provided on the back plate of the brake pad, both ends of the mounting hole are provided with a first countersunk hole and a second countersunk hole, a guide shaft is provided in the mounting hole, and one end of the guide shaft is provided A friction particle support body is connected, the friction particle support body is connected with the friction particles, the other end of the guide shaft is connected with a spring clip, the spring clip is located in the second counterbore, the first counterbore A damping support pad is provided.

After adopting this preferred solution, the damping support pad can avoid the stress concentration phenomenon of friction particles, reduce friction vibration, and thus play the role of vibration reduction and noise reduction.

The guide shaft is a columnar structure, the cross-sectional shape of the guide shaft is non-circular, and the shape of the installation hole is matched with the guide shaft.

After adopting this preferred solution, the anti-rotation mode of the friction particles is optimized. Different from the shape of the guide shaft and the installation hole in the existing installation structure, the shape of the guide column is optimized from a cylindrical shape to a non-cylindrical shape (such as prismatic, elliptical column, etc.). shape, etc.), the shape of the mounting hole matches the shape of the guide shaft, which can prevent the friction particles from rotating. Compared with the existing anti-rotation means, such as setting the anti-rotation block or deliberately setting the installation position of the friction particles, the technical solution has a simpler structure, reduces the difficulty of processing and assembly, and further improves the efficiency of the enterprise.

Preferably, the damping support pad includes upper and lower layers, the lower layer is a metal damping washer, and the upper layer is a heat insulating layer, and the heat insulating layer is made of thermal insulating material.

After adopting this preferred solution, the thermal insulation layer can reduce the influence of frictional heat on the metal damping washer, ensure the working life of the metal damping washer, and adjust the contact state between the friction particles and the brake disc through the deformation of the metal damping washer during the braking process , can avoid the stress concentration phenomenon on the surface of the friction particles, improve the thermal distribution of the braking interface, reduce the friction and vibration intensity of the system, so as to improve the braking safety and the effect of vibration reduction and noise reduction.

Preferably, the friction particles, the friction particle support and the guide shaft are sintered together at high temperature.

After adopting this preferred solution, the connection between the friction particles, the friction particle support and the guide shaft is firmer, and the compressive and shear strength is higher, which can prevent the friction particles, the friction particle support and the guide shaft from being damaged during the braking process , prolong the service life of the braking system.

To sum up, due to the adoption of the above-mentioned technical solutions, the beneficial effects of the present invention are:

1. The combination structure of the friction particles of the brake pad is optimized, and several combinations of friction particles of different shapes are used, which can organically combine the advantages of friction particles of different shapes, so that the braking system of the high-speed train can not only ensure the reliability and safety of braking At the same time, it has the ability to reduce vibration, noise and wear, reduce the noise pollution of the environment, bring a comfortable ride experience to passengers, and prolong the service life of the brake pads, thereby reducing production and operating costs, and contributing to the national transportation. Business brings higher operational efficiency.

2. Friction particles include polygonal friction particles and circular friction particles. Compared with polygonal friction particles, circular friction particles have better vibration and noise reduction effects, but polygonal friction particles are better than circular friction particles in stress distribution and braking efficiency. . Disposing circular friction particles at both ends of the brake pads and/or the outermost layer of the brake pads with a relatively large friction speed can reduce the occurrence of serious wear during the braking process as much as possible, and improve the stability of the braking process of the system It also achieves good vibration and noise reduction effects, further extending the service life of the brake pads. The hexagonal friction particles are arranged in the middle of the brake pad with mild impact, which can avoid stress concentration to a certain extent, ensure that the friction interface is closely fitted, improve braking efficiency, reduce braking distance, and further improve the safety of high-speed trains reliability and reliability, thus ensuring the safety of passengers on their journeys.

3. It can comprehensively utilize the properties of different materials to improve the overall contact uniformity and wear resistance of the brake pads. The wear resistance of the friction particles decreases from the two ends of the brake pad back plate to the middle, which can effectively improve the eccentric wear phenomenon of the brake pad during operation by using the wear resistance of different materials, and improve the performance of the brake pad. service life.

4. The setting of the damping support pad can avoid the stress concentration phenomenon of the friction particles, reduce the friction vibration, and thus play the role of vibration reduction and noise reduction.

5. The damping support pad includes a metal damping washer and a heat insulation layer. The heat insulation layer can reduce the influence of frictional heat on the metal damping washer and ensure the working life of the metal damping washer. During the braking process, the deformation of the metal damping washer can adjust the friction The contact state between the particles and the brake disc can avoid stress concentration on the surface of the friction particles, improve the thermal distribution of the braking interface, and reduce the friction and vibration intensity of the system, thereby improving braking safety and reducing vibration and noise.

6. The anti-rotation method of the friction particles is optimized. Different from the shape of the guide shaft and the installation hole in the existing installation structure, the shape of the guide column is optimized from cylindrical to non-cylindrical (such as prismatic, elliptical cylindrical, etc.), The shape of the mounting hole matches the shape of the guide shaft to prevent the friction particles from rotating.

7. The friction particles, the friction particle support and the guide shaft are integrated by high temperature sintering. The connection between the friction particles, the friction particle support and the guide shaft is more firm, and the compressive and shear strength is higher, which can prevent friction particles and friction. Particle supports and guide shafts are damaged during braking, extending the service life of the braking system.

Description of drawings

The specific implementation of the present invention will be described by the following embodiments and with reference to the accompanying drawings, wherein:

Fig. 1 is the structural representation of the present invention;

Fig. 2 is the schematic diagram of the friction particle arrangement mode of the brake pad in the present invention;

3 is a schematic diagram of another arrangement of friction particles of brake pads in the present invention;

Fig. 4 is the structural representation of friction particle in the present invention;

Fig. 5 is the structural representation of the guide shaft in the present invention;

Fig. 6 is the rear view of the brake pad back plate in the present invention;

Fig. 7 is the partial cross-sectional view of A-A section in Fig. 6;

Figure 8 is a schematic structural diagram of a damping support pad;

Fig. 9 is the structural representation of heat insulating layer;

Figure 10 is a schematic structural diagram of a metal damping washer;

Fig. 11 is a contact pressure distribution diagram of the present invention.

Among them, 1-brake disc, 2-brake pad back plate, 3-loading connecting rod, 4-loading buffer block, 5-loading connecting frame, 6-loading thrust frame, 7-friction particle, 701-round Friction particle, 702-polygonal friction particle, 8-friction particle support, 9-guide shaft, 10-spring collar, 11-installation hole, 12-first counterbore, 13-second counterbore, 14-metal damping Gasket, 15-Insulation.

Detailed ways

All features disclosed in this specification, or steps in all methods or processes disclosed, except mutually exclusive features and/or steps, may be combined in any way, not limited to the embodiments described below.

The present invention will be described in detail below with reference to FIGS. 1 to 11 .

Example 1

A high-speed train brake pad with optimized friction particle combination and installation method, comprising a brake disc 1, a brake pad structure and a loading device, the loading device is connected with the brake pad structure, and the brake pad structure is connected with the brake pad structure. The brake disc 1 cooperates, and the brake pad structure includes a brake pad back plate 2, and several friction particles 7 are arranged on the brake pad back plate 2, and the several friction particles 7 have two types and above shape. In this embodiment, the structure of the brake pad back plate 2 is symmetrical on the left and right, the shape is arc-like, and is formed by stamping of steel material.

The friction particles 7 include polygonal friction particles 702 and circular friction particles 701 . In this embodiment, the polygonal friction particles 702 are regular hexagonal friction particles.

The research shows that the performance of hexagonal friction particles is obviously inferior to that of circular friction particles in terms of vibration reduction and noise reduction, but their stress distribution and braking efficiency are better than that of circular friction particles. As shown in FIG. 3 , in this embodiment, the number of friction particles 7 is eighteen, of which eight are circular friction particles 701 , and the remaining ten are regular hexagonal friction particles. The eight circular friction particles 701 are arranged at the incision ends (ie both ends) of the brake pad back plate 2 with relatively large relative speed and impact, and four are arranged at each end; ten regular hexagonal friction particles are arranged at the opposite ends. The inner layer and middle of the brake pad back plate 2 with less speed and impact. The circular friction particles 701 are arranged at the cutting end of the brake pad or the outermost layer of the brake pad with a relatively large relative speed of grinding, which can reduce the occurrence of serious wear during the braking process as much as possible, avoid the accumulation of wear debris, and improve the system stability. It can improve the stability of the moving process, and achieve a good vibration and noise reduction effect, which further prolongs the service life of the brake pads. The regular hexagonal friction particles are arranged on the inner and middle of the brake pad with mild impact, which can avoid stress concentration to a certain extent, ensure that the friction interface is closely attached, improve braking efficiency, reduce braking distance, and further improve the performance of high-speed trains. Safety and reliability, thereby ensuring the safety of passengers' journeys.

The friction particle combination of the regular hexagon and the circular shape is temporarily adopted in this embodiment. In practical applications, friction particles of other shapes can be used for combination (for example, regular triangle, regular quadrilateral, regular pentagon, regular octagon, regular oval, plum blossom, etc.). The number distribution of two or more friction particles can also be adjusted according to the requirements of the working conditions.

The constituent materials of the friction particles include at least one powder metallurgy or at least one composite material. According to the actual needs of use, different composition materials can be selected, and the different advantageous properties of different materials can be comprehensively utilized.

The wear resistance of the friction particles 7 decreases from the two ends of the brake pad back plate 2 to the middle. By arranging friction particles with relatively strong wear resistance in the cut-in area (ie both ends) of the brake pad back plate 2, and arranging friction particles with relatively weak wear resistance in the middle, it is possible to effectively utilize the wear resistance of different materials. Improve the eccentric wear of the brake pads during operation and increase the service life of the brake pads.

The brake pad back plate 2 is provided with a mounting hole 11 for mounting the friction particles 7 , the two ends of the mounting hole 11 are provided with a first countersunk hole 12 and a second countersunk hole 13 , and the mounting hole 11 is provided with a first countersunk hole 12 and a second countersunk hole 13 . Guide shaft 9. The guide shaft 9 is a columnar structure, and the cross-sectional shape of the guide shaft 9 may be any other shape than a circle. The shape of the installation hole 11 is matched with the guide shaft 9 . In this embodiment, the cross-sectional shape of the guide shaft 9 is a rectangle or an ellipse. One end of the guide shaft 9 is connected with the friction particle support body 8 , and the other end of the guide shaft 9 is connected with a spring clip 10 . The friction particle support body 8 is connected to the friction particles 7 for supporting the friction particles 7 . The spring collar 10 is located in the second countersunk hole 13 for fixing the guide shaft 9 . The first counterbore 12 is provided with a damping support pad, which is used to resist the pressure transmitted by the friction particles 7 together with the friction particle support body 8 .

In this embodiment, the friction particles 7 are made of copper-based powder metallurgy material, and the spring clip 3 is made of spring steel material. The friction particles 7 are integrated with the friction particle support body 8 and the guide shaft 9 through high temperature sintering.

The damping support pad is composed of upper and lower layers. The upper layer is an insulating layer 15 and the lower layer is a metal damping washer 14. The insulating layer 15 is used to reduce the influence of frictional heat on the metal damping washer 14 and ensure the working life of the metal damping washer 14. . During the braking process, through the deformation of the metal damping washer 14, the contact state of the friction particles 7 and the brake disc 1 is adjusted, which can avoid the stress concentration phenomenon on the surface of the friction particles 7, improve the heat distribution of the braking interface, and reduce the friction and vibration intensity of the system. To improve braking safety and vibration reduction and noise reduction effect. The heat insulating layer 15 is made of heat insulating material.

The loading device includes a loading connecting frame 5 and a loading thrust frame 6 , the loading thrust frame 6 is hingedly connected with the loading connecting frame 5 , and the loading thrust frame 6 can rotate around the loading connecting frame 5 . The loading thrust frame 6 is connected with a loading connecting rod 3 , the loading connecting rod 3 is connected with a loading buffer block 4 , and the loading buffer block 4 is connected with the brake pad back plate 2 . During braking, the loading reasoning frame 6 is controlled to rotate around the loading connecting frame 5, so that the brake pad back plate 2 clamps the brake disc 1 to achieve the purpose of braking.

The interface contact pressure distribution between the brake disc and the brake pad has an important influence on the stability of the braking system, and the unstable vibration of the system is often caused by the uneven pressure distribution. The uniformity of the contact pressure distribution is usually used as an important indicator to evaluate the performance of the braking system. The more uniform the contact pressure distribution, the better the system braking performance.

In this example, two kinds of brake pads are analyzed by finite element analysis. The combined brake pad composed of hexagonal friction particles and circular friction particles is used as the test group, and the brake pad composed of hexagonal friction particles is used as the test group. as a control group. The contact pressure distribution is shown in Figure 11: when the brake disc is stationary, the contact pressures of the two brake pads are close to symmetrical distribution, and the contact pressures of the two brake pads are not much different. When the brake disc starts to rotate, the contact pressure distribution on the brake pad surface is no longer symmetrical. Due to friction, the maximum contact pressure becomes larger, and the maximum contact pressure occurs at the contact front edge of the brake pad. For combined brake pads, the maximum contact pressure on the contact surface is about 14MPa. For hexagonal brake pads, the maximum contact pressure on the contact surface is about 18MPa. It can be seen from the above data that the contact pressure of the combined brake pads is significantly smaller than that of the brake pads with hexagonal friction particles, so the contact pressure distribution of the combined brake pads is more uniform. Therefore, the combined brake pad of the present invention has better braking performance.

Embodiment 2

This embodiment is basically the same as the technical solution of the first embodiment, and the difference is:

As shown in FIG. 2 , in this embodiment, the number of friction particles 7 is eighteen, of which ten are circular friction particles 701 , and the remaining eight are regular hexagonal friction particles 702 . The ten circular friction particles 701 are arranged on the outer layer and the cut-in end of the brake pad back plate 2 with relatively high relative speed and impact; The inner layer and middle part of the back plate 2 of the moving brake pad. Due to the large number of passengers in the city, excessive braking noise will seriously affect the passenger's ride experience. Therefore, high-speed trains running in cities have higher requirements on the vibration and noise reduction of the braking system. In addition, when the high-speed train running in the city is braked, the external environment is relatively friendly, so the combination method in this embodiment is adopted in the quantity distribution of the two friction particles. The technical solution can organically combine the advantages of friction particles of different shapes, while ensuring the braking reliability and safety of the braking system of the high-speed train, reducing vibration and noise as much as possible, reducing the noise pollution of the environment, and improving the safety of passengers. Come for a comfortable ride.

The above-mentioned embodiments only represent specific implementations of the present application, and the descriptions thereof are specific and detailed, but should not be construed as limiting the protection scope of the present application. It should be pointed out that for those of ordinary skill in the art, without departing from the concept of the technical solution of the present application, several modifications and improvements can be made, which all belong to the protection scope of the present application.

Claims (9)

1. a high-speed train brake pad of optimized friction particle combination and installation mode, is characterized in that: comprise brake disc (1), brake pad structure and loading device, described loading device and brake pad structure The brake pad structure is matched with the brake disc (1), the brake pad structure includes a brake pad back plate (2), and several friction pads are arranged on the brake pad back plate (2). The particles (7), the several friction particles (7) have at least two shapes. 2. the high-speed train brake pad of a kind of optimized friction particle combination and installation method as claimed in claim 1, is characterized in that, described friction particle (7) comprises polygonal friction particle (702) and circular friction particle ( 701). 3. the high-speed train brake pad of a kind of optimized friction particle combination and installation method as claimed in claim 2, is characterized in that, described circular friction particle (701) is located in the back plate of brake pad (2) On the outside and/or both ends, the polygonal friction particles (702) are located on the inside and the middle of the brake pad back plate (2). 4. The high-speed train brake pad for optimizing the combination and installation of friction particles according to claim 1, wherein the composition material of the friction particles (7) comprises at least one powder metallurgy or at least one composite material. 5. the high-speed train brake pad of a kind of optimized friction particle combination and installation method as claimed in claim 1, is characterized in that, the wear resistance of described friction particle (7) is from brake pad back plate (2) ) decreases toward the middle at both ends. 6. The high-speed train brake pad for optimizing the combination of friction particles and the installation method as claimed in claim 1, wherein the brake pad back plate (2) is provided with a mounting hole (11), Both ends of the mounting hole (11) are provided with a first countersunk hole (12) and a second countersunk hole (13), a guide shaft (9) is provided in the mounting hole (11), and the guide shaft (9) is provided with a guide shaft (9). One end is connected with a friction particle support (8), the friction particle support (8) is connected with the friction particles (7), the other end of the guide shaft (9) is connected with a spring clip (10), the spring The collar (10) is located in the second counterbore (13), and a damping support pad is arranged in the first counterbore (12). 7. The high-speed train brake pad for optimizing the combination and installation of friction particles according to claim 6, wherein the guide shaft (9) is a columnar structure, and the cross-sectional shape of the guide shaft (9) Being non-circular, the shape of the mounting hole (11) is matched with the guide shaft (9). 8. The high-speed train brake pad for optimizing the combination and installation of friction particles as claimed in claim 6, wherein the damping support pad comprises upper and lower layers, the lower layer is a metal damping washer (14), and the upper layer is a metal damping washer (14). For the heat insulating layer (15), the heat insulating layer (15) is made of thermal insulating material. 9. The high-speed train brake pad for optimizing the combination and installation of friction particles according to claim 6, wherein the friction particles (7), the friction particle support body (8), the guide shaft (9) ) is integrated by high temperature sintering.

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