CN113669395B - High-temperature-resistant brake system assembly and preparation method thereof - Google Patents

High-temperature-resistant brake system assembly and preparation method thereof Download PDF

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Publication number
CN113669395B
CN113669395B CN202110950566.0A CN202110950566A CN113669395B CN 113669395 B CN113669395 B CN 113669395B CN 202110950566 A CN202110950566 A CN 202110950566A CN 113669395 B CN113669395 B CN 113669395B
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heat insulation
surface layer
reinforcing piece
temperature
layer
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CN113669395A (en
Inventor
张继承
李帅帅
张蔓蔓
张东生
陆甲杰
陈帅
曹二伟
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Gongyi Van Research Yihui Composite Material Co Ltd
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Gongyi Van Research Yihui Composite Material Co Ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D65/00—Parts or details
    • F16D65/02—Braking members; Mounting thereof
    • F16D65/12—Discs; Drums for disc brakes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T1/00—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles
    • B60T1/02—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles acting by retarding wheels
    • B60T1/06—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles acting by retarding wheels acting otherwise than on tread, e.g. employing rim, drum, disc, or transmission or on double wheels
    • B60T1/065—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles acting by retarding wheels acting otherwise than on tread, e.g. employing rim, drum, disc, or transmission or on double wheels employing disc
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L59/00—Thermal insulation in general
    • F16L59/02—Shape or form of insulating materials, with or without coverings integral with the insulating materials
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L59/00—Thermal insulation in general
    • F16L59/02—Shape or form of insulating materials, with or without coverings integral with the insulating materials
    • F16L59/028—Composition or method of fixing a thermally insulating material
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2200/00—Materials; Production methods therefor
    • F16D2200/0034—Materials; Production methods therefor non-metallic
    • F16D2200/0039—Ceramics
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2200/00—Materials; Production methods therefor
    • F16D2200/006—Materials; Production methods therefor containing fibres or particles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2200/00—Materials; Production methods therefor
    • F16D2200/0082—Production methods therefor
    • F16D2200/0086—Moulding materials together by application of heat and pressure

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Thermal Insulation (AREA)
  • Braking Arrangements (AREA)

Abstract

The invention provides a high-temperature-resistant brake system assembly and a preparation method thereof, wherein the high-temperature-resistant brake system assembly comprises a brake disc and a high-temperature-resistant heat insulation pad connected to the brake disc, and the brake disc is reserved with a first central hole for a brake shaft to pass through and a plurality of first mounting holes for mounting the high-temperature-resistant heat insulation pad; the high-temperature-resistant heat insulation pad is arranged on the inner wall of the brake disc and comprises a heat insulation mechanism and a reinforcing mechanism, wherein the heat insulation mechanism comprises an upper surface layer, a lower surface layer and a heat insulation layer arranged between the upper surface layer and the lower surface layer, the upper surface layer, the lower surface layer and the heat insulation layer are respectively provided with a second central hole and a second mounting hole which are in one-to-one correspondence with the first central hole and the first mounting hole, and the reinforcing mechanism is arranged between the upper surface layer and the lower surface layer; the reinforcing mechanism comprises a first reinforcing piece, a second reinforcing piece and a third reinforcing piece, wherein the first reinforcing piece and the second reinforcing piece are respectively connected with the inner edge and the outer edge of the heat insulation layer, and the third reinforcing piece is arranged on the second mounting hole along the hole wall. The invention has good mechanical strength and high temperature resistance.

Description

High-temperature-resistant brake system assembly and preparation method thereof
Technical Field
The invention belongs to the field of brake systems, and particularly relates to a high-temperature-resistant brake system component and a preparation method thereof.
Background
The brake disc is a necessary part of all vehicle braking systems, and is fixed on an axle and rotates together with wheels, when in braking, a brake block is extruded onto the brake disc under the pushing of a clamping piston, and the speed of the wheels is reduced through the friction between the brake block and the brake disc, so that the aim of decelerating and braking the vehicle is fulfilled. The brake disc is subjected to the axial clamping force of the friction lining on it and the friction force of the friction lining on both. The larger the dead weight and load of the automobile, the faster the speed, and the larger the stress of the brake disc during deceleration and braking. Each time the automobile brakes, the running kinetic energy is converted into heat energy, wherein 90% of the heat is absorbed by the brake disc body. When the temperature rises to a certain value, the too high temperature can lead to heat fading and deformation of the brake pad and the brake disc, and in addition, the brake oil can be gasified, thereby affecting the braking effect and even leading to braking failure. In particular, the automobile is in overload running on a longer downhill road section such as a plateau, a mountain land and the like, the brake system continuously works, the surface temperature of the brake disc can reach 400-600 ℃, and the brake disc is in a dark red high-temperature state, so that the brake disc material is required to have excellent high-temperature resistance and wear resistance.
Disclosure of Invention
In order to solve the problems, the invention provides the high-temperature-resistant brake system component and the preparation method thereof, which have certain mechanical strength and good high-temperature resistance and can ensure the safe operation of the brake system.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
the utility model provides a high temperature resistant braking system subassembly, includes the brake disc and connects in the high temperature resistant heat insulating mattress of brake disc, its characterized in that: a first central hole for a brake shaft to pass through is reserved at the central shaft of the brake disc, and a plurality of first mounting holes for mounting the high-temperature-resistant heat insulation pad are reserved around the central hole of the brake disc; the high-temperature-resistant heat insulation pad is arranged on the inner wall of the brake disc and comprises a heat insulation mechanism and a reinforcing mechanism, the heat insulation mechanism comprises an upper surface layer, a lower surface layer and a heat insulation layer arranged between the upper surface layer and the lower surface layer, the upper surface layer, the lower surface layer and the heat insulation layer are respectively provided with a second central hole and a second mounting hole which are in one-to-one correspondence with the first central hole and the first mounting hole, and the reinforcing mechanism is arranged between the upper surface layer and the lower surface layer; the reinforcing mechanism comprises a first reinforcing piece, a second reinforcing piece and a third reinforcing piece, wherein the first reinforcing piece and the second reinforcing piece are respectively connected with the inner edge and the outer edge of the heat insulation layer, and the third reinforcing piece is arranged in a second mounting hole of the heat insulation layer along the hole wall.
Further, the upper surface layer, the lower surface layer and the heat insulation layer are all ring-shaped.
Further, the upper end face and the lower end face of the first reinforcing member, the second reinforcing member and the third reinforcing member are respectively connected with the upper surface layer and the lower surface layer, and the upper surface layer, the lower surface layer, the first reinforcing member and the second reinforcing member are surrounded to form a circular channel for the heat insulation layer to be arranged.
Further, the thickness of the heat insulation layer is the same as that of the first reinforcing member and the second reinforcing member.
Further, the third reinforcement is cylindrical.
A preparation method of a high-temperature-resistant brake system component is characterized by comprising the following steps of:
coating resin on fiber cloth, curing at a certain temperature, and cutting the cured resin fiber cloth to obtain an upper surface layer, a lower surface layer, a first reinforcing piece, a second reinforcing piece and a third reinforcing piece;
coating a layer of adhesive on the surfaces of the upper surface layer and the lower surface layer obtained in the first step, performing heat treatment in an oven to enable the adhesive to be in a semi-cured state, and paving a heat insulation layer above the lower surface layer coated with the semi-cured state adhesive;
step three, respectively paving a first reinforcing piece, a second reinforcing piece and a third reinforcing piece on the inner ring, the outer ring and the second mounting hole of the heat insulation layer obtained in the step two, and then covering one surface of the upper surface layer coated with the semi-cured adhesive on the upper part of the heat insulation layer paved with the reinforcing mechanism, and performing hot press molding to obtain the high-temperature-resistant heat insulation pad;
and fourthly, mounting the high-temperature-resistant heat insulation pad obtained in the third step on a brake disc through a second mounting hole to obtain the high-temperature-resistant brake system component.
Further, the resin is one of phenolic resin and organic silicon resin; the fiber cloth is one of high silica glass fiber cloth, carbon fiber cloth and high temperature resistant ceramic fiber cloth; the adhesive is one of organic silicon resin and phenolic resin; the heat insulation layer is ceramic fiber aerogel felt.
Further, the ceramic fiber is mullite fiber, aluminum silicate fiber, aluminum oxide fiber, zirconium oxide fiber, basalt fiber, silicon carbide fiber, silicon nitride fiber and boron nitride fiber; the aerogel is one or more than two of silicon dioxide aerogel, titanium oxide aerogel, zirconium oxide aerogel or aluminum oxide aerogel.
In the first step, the curing temperature is 150-200 ℃, and the curing time is 10-40 min.
Further, in the second step, the heat treatment condition is that the heat treatment is carried out for 40-90 min at 80-100 ℃ in an oven.
In the third step, the hot press molding temperature is 100-180 ℃, the pressure is 2-10MPa, and the time is 10-30 min.
The beneficial effects of the invention are as follows:
1. the high-temperature-resistant heat insulation pad adopts a sandwich structure, the first reinforcing piece, the second reinforcing piece and the third reinforcing piece are respectively arranged at the inner side, the outer side and the second mounting hole of the heat insulation layer, the reinforcing mechanism, the upper surface layer and the lower surface layer are jointly surrounded to form a heat insulation space with a tight structure, so that the occurrence of the powder falling phenomenon of the heat insulation layer can be prevented, the integral mechanical property of the high-temperature-resistant heat insulation pad can be improved, and meanwhile, the ceramic fiber aerogel felt is adopted as the heat insulation layer, so that the integral high-temperature resistance of the heat insulation pad can be improved;
2. according to the high-temperature-resistant heat insulation pad, the upper surface layer, the heat insulation layer, the first reinforcing piece, the second reinforcing piece, the third reinforcing piece and the lower surface layer are compounded through hot press molding, so that the structural integrity can be improved, and the tightness of the overall structure can be improved;
3. the high-temperature-resistant heat insulation pad is arranged on the inner wall of the brake disc and is matched with the brake system for use, so that the safe operation of the brake system can be ensured.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a mating view of a thermal barrier, a lower surface layer and a third stiffener;
FIG. 3 is an exploded view of the structure of the present invention;
figure 4 is a graph of the back temperature surface of the high temperature resistant insulation mat over time,
fig. 5 is a cross-sectional view taken along the A-A plane of fig. 1.
Wherein, each reference sign in the figure is: 1-upper surface layer, 2-heat insulating layer, 3-lower surface layer, 4-first reinforcement, 5-second reinforcement, 6-second mounting hole, 7-third reinforcement, 8-second centre hole.
Detailed Description
In order that those skilled in the art will better understand the technical solutions provided by the present invention, the following description is made with reference to specific embodiments.
Example 1
The high-temperature-resistant brake system component comprises a brake disc and a high-temperature-resistant heat insulation pad, wherein a first central hole for a brake shaft to pass through is formed in the middle of the brake disc, a plurality of first mounting holes are formed in the outer edge of the first central hole, a mounting bolt or a mounting screw passes through a second mounting hole 6 of the high-temperature-resistant heat insulation pad to mount the high-temperature-resistant heat insulation pad at the first mounting hole of the inner wall of the brake disc, the brake shaft passes through the first central hole and a second central hole 8 of the brake disc and the high-temperature-resistant heat insulation pad, and the brake disc and the high-temperature-resistant heat insulation pad are fixed, so that the high-temperature-resistant brake system component is mounted; the high-temperature-resistant heat insulation pad comprises a heat insulation mechanism and a reinforcing mechanism, wherein the heat insulation mechanism and the reinforcing mechanism further comprise an upper surface layer 1, a heat insulation layer 2, a first reinforcing piece 4, a second reinforcing piece 5, a third reinforcing piece 7 and a lower surface layer 3; the first reinforcing piece 4 and the second reinforcing piece 5 are respectively arranged on the inner side and the outer side of the heat insulation layer 2, and the upper surface layer 1 and the lower surface layer 3 are respectively arranged on the upper side and the lower side of the heat insulation layer 2; the upper surface layer 1, the heat insulation layer 2, the first reinforcing piece 4, the second reinforcing piece 5 and the lower surface layer 3 are hollow annular; the assembled upper surface layer 1, heat insulating layer 2, first reinforcing member 4, second reinforcing member 5, third reinforcing member 7, and lower surface layer 3 were heat-pressed together at 150 ℃ and 6MPa for 15min, and compounded.
The thickness of the heat insulating layer 2 of the high temperature resistant heat insulating pad is identical with that of the first reinforcing piece 4 and the second reinforcing piece 5, the height of the heat insulating layer is identical with that of the third reinforcing piece 7, and the sizes of the outer circular rings of the upper surface layer 1, the second reinforcing piece 5 and the lower surface layer 3 can be identical to those of the inner circular rings of the upper surface layer 1, the first reinforcing piece 4 and the lower surface layer 3 in order to realize the flatness of the appearance of the high temperature resistant heat insulating pad. The thickness of the high temperature resistant heat insulation pad can be set to be 3mm.
The second mounting holes 6 are formed in the high-temperature-resistant heat insulation pad structure, the aperture of the second mounting holes 6 of the heat insulation layer is larger than that of the second mounting holes 6 of the upper surface layer and the lower surface layer, and after the third reinforcing piece 7 is arranged in the second mounting holes 6 of the heat insulation layer, the aperture of the third reinforcing piece is identical with that of the second mounting holes 6 of the upper surface layer and the lower surface layer; the positions of the upper surface layer 1, the lower surface layer 3 and the second mounting holes 6 of the heat insulation layer 2 are corresponding to those of the mounting holes on the brake disc, and the number of the second mounting holes is consistent, so that the whole structure is convenient to mount.
The heat insulation layer 2 of the high-temperature-resistant heat insulation pad is ceramic fiber aerogel felt, the heat insulation performance is excellent, and the defects of powder falling and weak structural strength are overcome by the combination of the two surface layers and the reinforcing mechanism. In practical application, the upper surface layer 1, the first reinforcing member 4, the second reinforcing member 5, the lower surface layer 3 and the third reinforcing member 7 of the high-temperature-resistant heat insulation pad are all phenolic resin reinforced high silica glass fiber cloth, specifically, phenolic resin is coated on the high silica glass fiber cloth, and the high silica glass fiber cloth is cured at a certain temperature. During the assembly process, the side of the upper surface layer 1 and the lower surface layer 3, which is in contact with the heat insulation layer 2, is coated with a silicone resin adhesive.
The preparation method of the high-temperature-resistant brake system component comprises the following steps:
(1) Coating phenolic resin on high silica glass fiber cloth, curing for 20min at 175 ℃, cutting Cheng Kongxin into a circular ring shape to obtain a lower surface layer 3, and repeating the steps to obtain an upper surface layer 1, a first reinforcing member 4, a second reinforcing member 5 and a third reinforcing member 7;
(2) Coating a layer of organic silicon resin adhesive on the surfaces of the upper surface layer 1 and the lower surface layer 3 in the step (1), and carrying out heat treatment in an oven at 90 ℃ for 60min to enable the organic silicon resin adhesive to be in a semi-cured state;
(3) And (3) paving a heat insulation layer 2 above the surface, with the organic silicon resin adhesive, of the lower surface layer 3 obtained in the step (2), wherein the heat insulation layer 2 is a ceramic fiber reinforced aerogel felt, more specifically an aluminum silicate fiber reinforced silica aerogel felt. 5 second mounting holes 6 matched with the first mounting holes of the brake disc are uniformly distributed on the heat insulation layer 2, a first reinforcing piece 4, a second reinforcing piece 5 and a third reinforcing piece 7 are respectively paved on the inner side, the outer side and the inner side of the second mounting holes 6 of the heat insulation layer 2, the number of the third reinforcing pieces 7 is the same as the number of the second mounting holes 6 preset in the heat insulation layer 2, and a base material layer A is obtained;
(4) Paving one surface of the upper surface layer 1 obtained in the step (2) with the organic silicon resin adhesive above the substrate A obtained in the step (3) to obtain a substrate B; in the actual operation process, the upper surface layer 1 and the lower surface layer 3 in the step (1) are not cut into the second mounting hole 6 in the cutting process, and the third reinforcing piece 7 is also a solid cylindrical strip, and the upper surface layer 1 and the lower surface layer 3 are paved on the upper surface and the lower surface of the reinforcing mechanism and the heat insulation layer 2;
(5) And (3) hot-press molding the base material B obtained in the step (4) at 150 ℃ and 6MPa for 15min, punching holes at the second mounting holes 6 of the heat insulation layer 2 after hot-press molding, and punching central holes of the second mounting holes 6 and the third reinforcing piece 7. Compared with the mode of directly punching in the cutting process, the dislocation between the second mounting holes 6 on the upper surface layer 1 and the lower surface layer 3 and the second mounting holes 6 of the heat insulation layer 2 in the laying process can be avoided, and the heat insulation pad is obtained;
(6) And (5) installing the high-temperature-resistant heat insulation pad obtained in the step (5) on the inner wall of the brake disc through the installation hole to obtain the required high-temperature-resistant brake system component.
Example 2
The high-temperature-resistant brake system component comprises a brake disc and a high-temperature-resistant heat insulation pad, wherein a first central hole for a brake shaft to pass through is formed in the middle of the brake disc, a plurality of first mounting holes are formed in the outer edge of the first central hole, and a mounting bolt or a mounting screw passes through a second mounting hole 6 of the high-temperature-resistant heat insulation pad to mount the high-temperature-resistant heat insulation pad at the first mounting hole of the inner wall of the brake disc; the high-temperature-resistant heat insulation pad comprises a heat insulation mechanism and a reinforcing mechanism, wherein the heat insulation mechanism and the reinforcing mechanism further comprise an upper surface layer 1, a heat insulation layer 2, a first reinforcing piece 4, a second reinforcing piece 5, a third reinforcing piece 7 and a lower surface layer 3; the first reinforcing piece 4 and the second reinforcing piece 5 are respectively arranged on the inner side and the outer side of the heat insulation layer 2, and the upper surface layer 1 and the lower surface layer 3 are respectively arranged on the upper side and the lower side of the heat insulation layer 2; the upper surface layer 1, the heat insulation layer 2, the first reinforcing piece 4, the second reinforcing piece 5 and the lower surface layer 3 are hollow annular; the assembled upper surface layer 1, heat insulating layer 2, first reinforcing member 4, second reinforcing member 5, third reinforcing member 7, and lower surface layer 3 were heat-pressed together at 100℃and 10MPa for 30 minutes, and were compounded.
The thickness of the heat insulating layer 2 of the high temperature resistant heat insulating pad is identical with that of the first reinforcing piece 4 and the second reinforcing piece 5, the height of the heat insulating layer is identical with that of the third reinforcing piece 7, and the sizes of the outer circular rings of the upper surface layer 1, the second reinforcing piece 5 and the lower surface layer 3 can be identical to those of the inner circular rings of the upper surface layer 1, the first reinforcing piece 4 and the lower surface layer 3 in order to realize the flatness of the appearance of the high temperature resistant heat insulating pad. The thickness of the high temperature resistant heat insulation pad can be set to be 5mm. The high-temperature-resistant heat insulation pad is structurally provided with the second mounting holes 6, the third reinforcing piece 7 is arranged in the second mounting holes 6 of the heat insulation layer 2, the positions of the upper surface layer 1, the lower surface layer 3 and the second mounting holes 6 of the heat insulation layer 2 are corresponding to those of the mounting holes on the brake disc, the quantity of the mounting holes is kept consistent, and the mounting of the whole structure is facilitated.
The heat insulation layer 2 of the high-temperature-resistant heat insulation pad is ceramic fiber aerogel felt, the heat insulation performance is excellent, and the defects of powder falling and weak structural strength are overcome by the combination of the two surface layers and the reinforcing mechanism. In practical application, the upper surface layer 1, the first reinforcing member 4, the second reinforcing member 5, the lower surface layer 3 and the third reinforcing member 7 of the high-temperature-resistant heat insulation pad are all made of phenolic resin reinforced carbon fiber cloth, specifically, phenolic resin is coated on the carbon fiber cloth, and the carbon fiber cloth is cured at a certain temperature. During the assembly process, the sides of the upper surface layer 1 and the lower surface layer 3, which are contacted with the heat insulation layer 2, are coated with phenolic resin adhesive.
During the preparation process:
(1) Coating phenolic resin on carbon fiber cloth, curing for 40min at 150 ℃, cutting Cheng Kongxin into a circular ring shape to obtain a lower surface layer 3, and repeating the steps to obtain an upper surface layer 1, a first reinforcing member 4, a second reinforcing member 5 and a third reinforcing member 7;
(2) Coating a layer of phenolic resin adhesive on the surfaces of the upper surface layer 1 and the lower surface layer 3 in the step (1), and carrying out heat treatment for 90min at 80 ℃ in an oven to enable the phenolic resin adhesive to be in a semi-cured state;
(3) And (3) paving a heat insulation layer 2 above the surface, with the phenolic resin adhesive, of the lower surface layer 3 obtained in the step (2), wherein the heat insulation layer 2 is aluminum silicate fiber reinforced alumina aerogel. 4-6 second mounting holes 6 matched with the first mounting holes of the brake disc are uniformly distributed on the heat insulation layer 2, a first reinforcing piece 4, a second reinforcing piece 5 and a third reinforcing piece 7 are respectively paved on the inner side, the outer side and the inner side of the heat insulation layer 2, and the number of the third reinforcing pieces 7 is the same as that of the second mounting holes 6 preset in the heat insulation layer 2, so that a substrate layer A is obtained;
(4) Paving one surface of the upper surface layer 1 obtained in the step (2) with the phenolic resin adhesive above the base material A obtained in the step (3) to obtain a base material B; in the actual operation process, the upper surface layer 1 and the lower surface layer 3 in the step (1) are directly cut into second mounting holes 6 of the upper surface layer 1 and the lower surface layer 3 in the cutting process, in the process that the upper surface layer 1 and the lower surface layer 3 are paved on the upper surface and the lower surface of the reinforcing mechanism and the heat insulation layer 2 (namely, the base material B is obtained), the second mounting holes 6 of the upper surface layer 1, the lower surface layer 3 and the heat insulation layer 2 are in one-to-one correspondence, the third reinforcing piece 7 at the moment is directly applied to a cylindrical shape with an empty center, and paving and assembling are carried out on the basis of hole correspondence.
(5) Performing hot press molding on the base material B obtained in the step (4) at 100 ℃ and 10MPa for 30min to obtain a heat insulation pad;
(6) And (5) installing the high-temperature-resistant heat insulation pad obtained in the step (5) on the inner wall of the brake disc through the installation hole to obtain the required high-temperature-resistant brake system component.
Example 3
The high-temperature-resistant brake system component comprises a brake disc and a high-temperature-resistant heat insulation pad, wherein a first central hole for a brake shaft to pass through is formed in the middle of the brake disc, a plurality of first mounting holes are formed in the outer edge of the first central hole, and a mounting bolt or a mounting screw passes through a second mounting hole 6 of the high-temperature-resistant heat insulation pad to mount the high-temperature-resistant heat insulation pad at the first mounting hole of the inner wall of the brake disc; the high-temperature-resistant heat insulation pad comprises a heat insulation mechanism and a reinforcing mechanism, wherein the heat insulation mechanism and the reinforcing mechanism further comprise an upper surface layer 1, a heat insulation layer 2, a first reinforcing piece 4, a second reinforcing piece 5, a third reinforcing piece 7 and a lower surface layer 3; the first reinforcing piece 4 and the second reinforcing piece 5 are respectively arranged on the inner side and the outer side of the heat insulation layer 2, and the upper surface layer 1 and the lower surface layer 3 are respectively arranged on the upper side and the lower side of the heat insulation layer 2; the upper surface layer 1, the heat insulation layer 2, the first reinforcing piece 4, the second reinforcing piece 5 and the lower surface layer 3 are hollow annular; the assembled upper surface layer 1, heat insulating layer 2, first reinforcing member 4, second reinforcing member 5, third reinforcing member 7, and lower surface layer 3 were heat-pressed together at 180 ℃ and 2MPa for 10min, and compounded.
The thickness of the heat insulating layer 2 of the high temperature resistant heat insulating pad is identical with that of the first reinforcing piece 4 and the second reinforcing piece 5, the height of the heat insulating layer is identical with that of the third reinforcing piece 7, and the sizes of the outer circular rings of the upper surface layer 1, the second reinforcing piece 5 and the lower surface layer 3 can be identical to those of the inner circular rings of the upper surface layer 1, the first reinforcing piece 4 and the lower surface layer 3 in order to realize the flatness of the appearance of the high temperature resistant heat insulating pad. The thickness of the high temperature resistant heat insulation pad can be set to be 6mm. The second mounting holes 6 are formed in the high-temperature-resistant heat insulation pad structure, the aperture of the second mounting holes 6 of the heat insulation layer is larger than that of the second mounting holes 6 of the upper surface layer and the lower surface layer, and after the third reinforcing piece 7 is arranged in the second mounting holes 6 of the heat insulation layer, the aperture of the third reinforcing piece is identical with that of the second mounting holes 6 of the upper surface layer and the lower surface layer; the positions of the upper surface layer 1, the lower surface layer 3 and the second mounting holes 6 of the heat insulation layer 2 are corresponding to those of the mounting holes on the brake disc, and the number of the second mounting holes is consistent, so that the whole structure is convenient to mount.
In terms of material selection, the heat insulation layer 2 of the high-temperature-resistant heat insulation pad is ceramic fiber aerogel felt, the heat insulation performance is excellent, and the defects of powder falling and weak structural strength are overcome by the combination of two surface layers and a reinforcing mechanism. In practical application, the upper surface layer 1, the first reinforcing member 4, the second reinforcing member 5, the lower surface layer 3 and the third reinforcing member 7 of the high-temperature-resistant heat insulation pad are all made of organic silicon resin reinforced high-temperature-resistant ceramic fiber cloth, and the organic silicon resin is coated on the high-temperature-resistant ceramic fiber cloth and cured at a certain temperature to obtain the high-temperature-resistant heat insulation pad. In the assembly process, the side, which is contacted with the heat insulation layer 2, of the upper surface layer 1 and the lower surface layer 3 of the high-temperature-resistant heat insulation pad is coated with the organic silicon resin adhesive.
The actual preparation and assembly method comprises the following steps:
(1) Coating organic silicon resin on high-temperature-resistant ceramic fiber cloth, curing for 10min at 200 ℃, cutting Cheng Kongxin into a circular ring shape to obtain a lower surface layer 3, and repeating the steps to obtain an upper surface layer 1, a first reinforcing piece 4, a second reinforcing piece 5 and a third reinforcing piece 7;
(2) Coating a layer of organic silicon resin adhesive on the surfaces of the upper surface layer 1 and the lower surface layer 3 in the step (1), and carrying out heat treatment in an oven at 100 ℃ for 40min to enable the organic silicon resin adhesive to be in a semi-cured state;
(3) And (3) paving a heat insulation layer 2 above the surface, with the organic silicon resin adhesive, of the lower surface layer 3 obtained in the step (2), wherein the heat insulation layer 2 is mullite fiber reinforced zirconia aerogel felt. 6 second mounting holes 6 matched with the first mounting holes of the brake disc are uniformly distributed on the heat insulation layer 2, a first reinforcing piece 4, a second reinforcing piece 5 and a third reinforcing piece 7 are respectively paved on the inner side, the outer side and the inner side of the second mounting holes 6 of the heat insulation layer 2, the number of the third reinforcing pieces 7 is the same as the number of the second mounting holes 6 preset in the heat insulation layer 2, and a base material layer A is obtained;
(4) Paving one surface of the upper surface layer 1 obtained in the step (2) with the organic silicon resin adhesive above the substrate A obtained in the step (3) to obtain a substrate B; in the actual operation process, the upper surface layer 1 and the lower surface layer 3 in the step (1) are not cut into the second mounting hole 6 in the cutting process, and the third reinforcing piece 7 is also a solid cylindrical strip, and the upper surface layer 1 and the lower surface layer 3 are paved on the upper surface and the lower surface of the reinforcing mechanism and the heat insulation layer 2;
(5) And (3) hot-press molding the base material B obtained in the step (4) at 180 ℃ and 2MPa for 10min, punching holes at the second mounting holes 6 of the heat insulation layer 2 after hot-press molding, and punching central holes of the second mounting holes 6 and the third reinforcing piece 7. Compared with the mode of directly punching in the cutting process, the dislocation between the second mounting holes 6 on the upper surface layer 1 and the lower surface layer 3 and the second mounting holes 6 of the heat insulation layer 2 in the laying process can be avoided, and the heat insulation pad is obtained;
(6) And (5) installing the high-temperature-resistant heat insulation pad obtained in the step (5) on the inner wall of the brake disc through the installation hole to obtain the required high-temperature-resistant brake system component.
Comparative example 1: the high silica glass fiber cloth reinforced phenolic resin plate which is the same as the surface layer and the reinforcement layer of the embodiment 1 is used as the heat insulation pad, and the thickness of the heat insulation pad is consistent with that of the high temperature resistant heat insulation pad prepared in the embodiment 1.
Comparative example 2: the heat insulating layer of the high temperature resistant heat insulating pad is made of organic polymer solid-solid phase change material, and other operation steps are the same as in example 1.
Comparative example 3: the heat insulating layer of the high temperature resistant heat insulating pad is provided with a first reinforcing member and a second reinforcing member along the inner edge and the outer edge, and a third reinforcing member is not provided, the punching of the second mounting holes on the upper surface layer and the lower surface layer is not performed after the hot press molding, and other operation steps are the same as those of embodiment 1
And performing a temperature resistance test and a fire experiment on the high-temperature resistant heat insulation pad and the three groups of comparison samples.
The temperature resistance test and the two groups of comparison samples are carried out on a high-temperature heating platform, the temperature of the surface of the samples is recorded by a temperature recording instrument, the actual temperature of the high-temperature surface fluctuates at about 745 ℃, the test time is 20 minutes, and the time-dependent change curve of the back-temperature surface of the high-temperature heat insulation pad is shown in figure 4. The temperature of the back surface is lower than 238.5 ℃ within 20 minutes under the condition of less environmental influence. The high temperature resistant heat insulation pad is subjected to a fire experiment, and a butane spray gun is used, wherein the flame temperature is about 1000 ℃.
The test result shows that after 20 minutes, the back temperature of the high-temperature-resistant heat insulation pad is 238.5 ℃, no pungent smell exists in the temperature-resistant test process, and no open flame exists in the fire test. After 20 minutes, the heat insulation pad obtained in the comparative example 1 has the back temperature of 340.4 ℃, emits black smoke in the temperature resistance test process, has pungent smell, and has obvious open flame in the fire test. After 20 minutes, the heat insulation pad obtained in the comparative example 2 has a back temperature of 317.5 ℃ and has pungent smell and spicy eyes in the temperature resistance test process; the burning experiment has no open fire and has spicy smell. After 20 minutes, the back temperature of the high-temperature-resistant heat insulation pad obtained in the comparative example 3 is 236.6 ℃, no pungent smell exists in the temperature-resistant test process, and no open flame exists in the fire experiment.
The high-temperature-resistant heat-insulating pad prepared by the invention has the advantages of best temperature resistance, no pungent smell, no phenomenon of open flame in the process of burning, worst temperature resistance of sample 1 and obvious burning in the process of burning.
The density, specific heat capacity, heat conductivity coefficient and mechanical property of the prepared high-temperature-resistant heat insulation pad are measured. Table 1 shows performance data of the high temperature resistant heat insulation pad obtained by the test, wherein the heat conductivity coefficient test adopts the standard GB/T10294-2008, the equipment heat conductivity coefficient tester DR is selected, the specific heat capacity test standard adopts ASTME1269, the equipment DSC 200F3 is selected, the density test standard adopts GB/T5486-2008, the elastic modulus test standard adopts GB/T1040.2-2006, and the Poisson ratio test standard adopts GB/T1040.2-2006.
TABLE 1 high temperature resistant Heat insulation pad Performance test
Figure 391323DEST_PATH_IMAGE001
The high-temperature-resistant heat insulation pad prepared by the method has a heat conductivity coefficient as low as 0.04273 w/(m· ℃ C.) and a specific heat capacity of 1.004J/(kg· ℃ C.), and ensures good heat insulation performance. The high-temperature-resistant heat insulation pad has the elastic modulus and the poisson ratio of 5.27GPa and 0.13 respectively, has good mechanical properties, and can maintain good structural stability. Its density is 630+ -25 kg/m 3 The whole structure is lighter, and unnecessary load is lightened in practical application.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. The present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (9)

1. The preparation method of the high temperature resistant brake system component comprises a brake disc and a high temperature resistant heat insulation pad connected to the brake disc, and is characterized in that: a first central hole for a brake shaft to pass through is reserved at the central shaft of the brake disc, and a plurality of first mounting holes for mounting the high-temperature-resistant heat insulation pad are reserved around the central hole of the brake disc; the high-temperature-resistant heat insulation pad is arranged on the inner wall of the brake disc and comprises a heat insulation mechanism and a reinforcing mechanism, the heat insulation mechanism comprises an upper surface layer, a lower surface layer and a heat insulation layer arranged between the upper surface layer and the lower surface layer, the upper surface layer, the lower surface layer and the heat insulation layer are respectively provided with a second central hole and a second mounting hole which are in one-to-one correspondence with the first central hole and the first mounting hole, and the reinforcing mechanism is arranged between the upper surface layer and the lower surface layer; the reinforcing mechanism comprises a first reinforcing piece, a second reinforcing piece and a third reinforcing piece, wherein the first reinforcing piece and the second reinforcing piece are respectively connected with the inner edge and the outer edge of the heat insulation layer, and the third reinforcing piece is arranged on the second mounting hole of the heat insulation layer along the hole wall; the heat insulation layer is ceramic fiber aerogel felt;
the method comprises the following specific steps:
coating resin on fiber cloth, curing at a certain temperature, and cutting the cured resin fiber cloth to obtain an upper surface layer, a lower surface layer, a first reinforcing piece, a second reinforcing piece and a third reinforcing piece;
coating a layer of adhesive on the surfaces of the upper surface layer and the lower surface layer obtained in the first step, performing heat treatment in an oven to enable the adhesive to be in a semi-cured state, and paving a heat insulation layer above the lower surface layer coated with the semi-cured state adhesive;
step three, respectively paving a first reinforcing piece, a second reinforcing piece and a third reinforcing piece on the inner ring, the outer ring and the second mounting hole of the heat insulation layer obtained in the step two, and then covering one surface of the upper surface layer coated with the semi-cured adhesive on the upper part of the heat insulation layer paved with the reinforcing mechanism, and performing hot press molding to obtain the high-temperature-resistant heat insulation pad;
and fourthly, mounting the high-temperature-resistant heat insulation pad obtained in the third step on a brake disc through a second mounting hole to obtain the high-temperature-resistant brake system component.
2. The method for manufacturing a high temperature resistant brake system assembly according to claim 1, wherein: the upper surface layer, the lower surface layer and the heat insulation layer are all annular.
3. The method for manufacturing a high temperature resistant brake system assembly according to claim 1, wherein: the upper end face and the lower end face of the first reinforcing piece, the upper end face and the lower end face of the second reinforcing piece and the lower end face of the third reinforcing piece are respectively connected with the upper surface layer and the lower surface layer, and the upper surface layer, the lower surface layer, the first reinforcing piece and the second reinforcing piece are encircled to form a circular channel for the heat insulation layer to be arranged.
4. A method of manufacturing a high temperature resistant brake system assembly according to claim 3, wherein: the thickness of the heat insulation layer is the same as that of the first reinforcing piece and the second reinforcing piece.
5. The method for manufacturing a high temperature resistant brake system assembly according to claim 1, wherein: the third reinforcement is cylindrical.
6. The method for manufacturing a high temperature resistant brake system assembly according to claim 1, wherein: the resin is one of phenolic resin and organic silicon resin; the fiber cloth is one of high silica glass fiber cloth, carbon fiber cloth and ceramic fiber cloth; the adhesive is one of organic silicon resin and phenolic resin.
7. The method for manufacturing a high temperature resistant brake system assembly according to claim 1, wherein: in the first step, the curing temperature is 150-200 ℃, and the curing time is 10-40 min.
8. The method for manufacturing a high temperature resistant brake system assembly according to claim 1, wherein: and in the second step, the heat treatment condition is that the heat treatment is carried out for 40-90 min at 80-100 ℃ in an oven.
9. The method for manufacturing a high temperature resistant brake system assembly according to claim 1, wherein: and thirdly, hot press molding is carried out at the temperature of 100-180 ℃, the pressure of 2-10MPa and the time of 10-30 min.
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