A 160km/h express truck brake pad for preventing thermal cracking of brake disc and manufacturing method thereof

A fast-moving truck, heat generation technology, applied in the direction of chemical instruments and methods, friction linings, other chemical processes, etc., can solve the problems of brake pad friction coefficient reduction, brake disc thermal cracking, driving safety threats, etc., to achieve wear resistance The effect of low rate, increased strength, and reduced material density

Active Publication Date: 2021-02-23
SHANGHAI REINPHEN NEW MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Excessively high temperature will reduce the friction coefficient of the brake pad, cause thermal recession, and cause serious wear. The brake disc may produce thermal cracks under the action of thermal load, which poses a certain threat to driving safety and causes large economic losses.
The 25T passenger car is designed and manufactured to meet the fifth speed increase of 160km / h for China's railways, and the brake discs used also have thermal cracking problems
[0004] At present, the brake pads of 160km / h express trucks currently in use in China have defects such as severe high temperature wear and thermal cracking of the brake disc.

Method used

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  • A 160km/h express truck brake pad for preventing thermal cracking of brake disc and manufacturing method thereof
  • A 160km/h express truck brake pad for preventing thermal cracking of brake disc and manufacturing method thereof
  • A 160km/h express truck brake pad for preventing thermal cracking of brake disc and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] A method for manufacturing brake pads for express freight cars with a maximum speed of 160km / h for preventing thermal cracking of brake discs, comprising the following steps:

[0039] (1) Preparation of raw materials:

[0040]

[0041] (2) Preparation:

[0042]The above-mentioned raw materials are proportioned. Add boron-modified phenolic resin and butyl rubber in proportion to the high-speed rake mixer and mix for 10 minutes, then add vermiculite, fluorite, magnesium oxide, clay and dispersant in proportion to mix and stir for 8 minutes, and finally Add reinforcing fiber, carbon fiber and sepiolite fiber in proportion and mix and stir for 8 minutes until uniform.

[0043] Put the bottom plate in the molding mold first, then put the obtained mixture into the molding mold, control the molding temperature to 70°C, and the molding pressure to 200kg / cm 2 , the response time is 500 seconds. Then the formed brake pads are sintered at high temperature and solidified. Th...

Embodiment 2

[0052] A method for manufacturing brake pads for express freight cars with a maximum speed of 160km / h for preventing thermal cracking of brake discs, comprising the following steps:

[0053] (1) Preparation of raw materials:

[0054]

[0055] (2) Preparation:

[0056] The above-mentioned raw materials are proportioned. Add boron-modified phenolic resin and butyl rubber in proportion to the high-speed rake mixer and mix for 12 minutes, then add vermiculite, fluorite, magnesium oxide, clay and dispersant in proportion to mix and stir for 10 minutes, and finally Add reinforcing fiber, carbon fiber and sepiolite fiber in proportion and mix and stir for 10 minutes until uniform.

[0057] Put the bottom plate in the forming mold first, then place the obtained mixture in the forming mold, control the forming temperature to 100°C, and the forming pressure to 300kg / cm 2 , the reaction time is 600 seconds. Then sinter the formed brake pads at high temperature to solidify. The sin...

Embodiment 3

[0060] A method for manufacturing brake pads for express freight cars with a maximum speed of 160km / h for preventing thermal cracking of brake discs, comprising the following steps:

[0061] (1) Preparation of raw materials:

[0062]

[0063] (2) Preparation:

[0064] The above-mentioned raw materials are proportioned. Add boron-modified phenolic resin and butyl rubber in proportion to the high-speed rake mixer and mix for 15 minutes, then add vermiculite, fluorite, magnesium oxide, clay and dispersant in proportion to mix and stir for 10 minutes, and finally Add reinforcing fiber, carbon fiber and sepiolite fiber in proportion and mix and stir for 10 minutes until uniform.

[0065] Put the bottom plate in the molding mold first, then put the obtained mixture into the molding mold, control the molding temperature to 130°C, and the molding pressure to 500kg / cm 2 , the response time is 800 seconds. Then sinter the formed brake pads at high temperature to solidify. The sin...

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Abstract

The invention relates to a 160km / h express freight car brake pad for preventing thermal cracking of the brake disc and a manufacturing method thereof. The 160km / h express truck brake pads for preventing heat cracking of the brake discs include the following components and weight percentages: boron modified phenolic resin 20%-40%, butyl rubber 10%-18%, reinforcing fiber 6% ‑10%, carbon fiber 10%‑18%, sepiolite fiber 1%‑5%, vermiculite 1%‑8%, fluorite 2%‑8%, magnesium oxide 2%‑9%, clay 2%‑8 %, dispersant 0.2%‑3%. Compared with the prior art, the brake disc of the invention has a lower density, is more convenient to use, and can reduce vehicle quality. The brake pad of the present invention has a microporous structure, and the micropores play the role of heat dissipation, which can effectively reduce the friction temperature, the friction coefficient does not decline at a high temperature of 600°C, and the brake disc has no hot spots and cracks, effectively protecting the couple. The wear of the brake pads is low and the service life is longer than that of similar products.

Description

technical field [0001] The invention relates to a friction material, in particular to a 160km / h express truck brake pad for preventing heat cracking of the brake disc and a manufacturing method thereof. Background technique [0002] Freight transportation is an important part of railway transportation. The speed of railway freight cars is also gradually increasing. Express freight cars are developing towards heavy load and high speed. The speed has been increased from the original 120km / h to the current 160km / h, which will greatly improve the freight efficiency. The main features of the 160km / h fast freight train braking system: ①The control valve adopts a non-slide valve structure, and has the switching function of "fast and normal", which can adapt to the braking requirements of trains with different formations and different operating speeds. ②The indirect action mode is adopted, and the disc brake is equipped with a stepless empty-load truck adjustment device. ③ Adding ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16D69/02C09K3/14
CPCF16D69/023F16D69/025F16D69/027F16D2069/002F16D2200/0034F16D2200/0052F16D2200/0056F16D2200/0065F16D2200/0086F16D2250/0023
Inventor 张定权
Owner SHANGHAI REINPHEN NEW MATERIAL TECH CO LTD
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