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Brake disc with high friction coefficient

A technology of high friction coefficient and brake pads, which is applied in the direction of friction linings, mechanical equipment, gear transmission mechanisms, etc., can solve problems such as the decrease of friction coefficient of friction pads, difficulty in guaranteeing service life, and affecting driving safety, so as to improve the friction coefficient , maintaining stability and maintaining thermal conductivity

Active Publication Date: 2019-07-05
SHANDONG DOUBLE LINK BRAKE MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] At present, the research on friction materials with high friction coefficient at home and abroad is facing the same technical problem, that is, when the brake pad has a high friction coefficient, it is easy to generate resonance when braking. With the appearance of noise, the friction coefficient is higher The higher the friction coefficient, the easier it is to generate noise. When it reaches 0.45-0.5 or higher, it is very easy to generate noise; at the same time, the high friction coefficient also means that the wear resistance is poor, and the service life is difficult to guarantee; especially in the high-temperature braking process, this defect The performance is particularly obvious, not only the friction coefficient will decrease, but also the high-frequency vibration will increase, the probability of noise will increase, and the wear and tear will increase accordingly.
In addition, brake pads with a high friction coefficient will generate instantaneous high temperature during braking. Under high temperature conditions, the friction coefficient of the friction pad will decrease, and the thermal degradation will be serious, which will affect the safety of driving.

Method used

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  • Brake disc with high friction coefficient
  • Brake disc with high friction coefficient
  • Brake disc with high friction coefficient

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] Embodiment 1: Preparation of high friction coefficient brake pad

[0067] 1. Raw material composition (by weight percentage):

[0068] Polyacrylonitrile fiber 15%, hybrid reinforcing fiber 15%, zirconium silicate 7%, magnesium oxide 7%, antimony sulfide 3%, graphite 6%, molybdenum disulfide 4%, foam iron powder 8%, light calcium carbonate 16% %, barium sulfate 12%, resin 7%.

[0069] Among them: hybrid reinforcing fiber is made of aramid pulp, glass fiber and mineral fiber in a weight ratio of 1:2:4.

[0070] The resin is liquid cashew nut shell liquid modified phenolic resin.

[0071] 2. Preparation method:

[0072] Dry mix other raw materials except resin evenly to obtain a mixture, spread the mixture on a sieve with a thickness of 1cm, the mesh number of the sieve is smaller than the particle size of the mixture, so that the mixture will not Slip through the sieve.

[0073] Select dehydrated alcohol as solvent for use, it is 20% that resin is diluted to concentr...

Embodiment 2

[0075] Embodiment 2: Preparation of high friction coefficient brake pad

[0076] 1. Raw material composition (by weight percentage):

[0077]Polyacrylonitrile fiber 8%, hybrid reinforcing fiber 20%, zirconium silicate 10%, magnesium oxide 5%, antimony sulfide 5%, graphite 5%, molybdenum disulfide 5%, foam iron powder 10%, light calcium carbonate 12 %, barium sulfate 15%, resin 5%.

[0078] Among them: hybrid reinforcing fiber is made of aramid pulp, glass fiber and mineral fiber in a weight ratio of 1:2:4.

[0079] The resin is liquid cashew nut shell liquid modified phenolic resin.

[0080] 2. Preparation method:

[0081] Dry mix other raw materials except resin evenly to obtain a mixture, spread the mixture on a sieve with a thickness of 1cm, the mesh number of the sieve is smaller than the particle size of the mixture, so that the mixture will not Slip through the sieve.

[0082] Use acetone as the solvent, dilute the resin to a concentration of 15%, and obtain the res...

Embodiment 3

[0084] Embodiment 3: Preparation of high friction coefficient brake pad

[0085] 1. Raw material composition (by weight percentage):

[0086] Polyacrylonitrile fiber 15%, hybrid reinforcing fiber 10%, zirconium silicate 5%, magnesium oxide 10%, antimony sulfide 2%, graphite 10%, molybdenum disulfide 2%, foam iron powder 5%, light calcium carbonate 20% %, barium sulfate 11%, resin 10%.

[0087] Among them: hybrid reinforcing fiber is made by mixing aramid pulp and mineral fiber at a weight ratio of 1:4.

[0088] The resin is liquid cashew nut shell liquid modified phenolic resin.

[0089] 2. Preparation method:

[0090] Dry mix other raw materials except resin evenly to obtain a mixture, spread the mixture on a sieve with a thickness of 1cm, the mesh number of the sieve is smaller than the particle size of the mixture, so that the mixture will not Slip through the sieve.

[0091] Select dehydrated alcohol as solvent for use, it is 25% that resin is diluted to concentration...

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Abstract

The invention discloses a brake disc with a high friction coefficient. The brake disc is prepared from following raw materials in percentage by weight: 8 to 15% of polyacrylonitrile fibers, 10 to 20%of hybrid reinforcing fibers, 5 to 10% of zirconium silicate, 5 to 10% of magnesium oxide, 2 to 5% of antimony sulfide, 5 to 10% of graphite, 2 to 5% of molybdenum disulfide, 5 to 10% of porous iron powder, 10 to 20% of light calcium carbonate, 10 to 15% of barium sulfate, and 5 to 10 of resin. A friction material of asbestos-free low metal formula is adopted; the friction coefficient of the brakedisc is designed to be a FG grade, namely the friction coefficient is in a range of 0.40 to 0.50; the defects of a half metal formula are overcome; and the requirements of domestic automobiles and European automobiles are satisfied. The friction coefficient reaches the FG grade (0.40-0.50); the high temperature heat fade is small, the stability is high; the friction coefficient is high, the brakesensitivity is high, the safety is guaranteed, at the same time, the noise index reaches 9.1, the braking noise is reduced, the wear resistant performance is also improved, and the contradiction between the friction coefficient and wear resistant performance / comfort level is resolved.

Description

technical field [0001] The invention belongs to the technical field of vehicle braking, in particular to a brake pad with a high friction coefficient, and relates to a formulation design and a preparation method of a brake pad with a high friction coefficient. Background technique [0002] For brake pads, people usually have the following basic requirements for their performance: [0003] (1) Appropriate and stable friction coefficient. Friction coefficient is one of the most important technical indicators of friction materials, which determines the basic braking torque of brake pads. Usually it is not a constant, it is changed by temperature, pressure, speed or surface state, friction environment. The friction coefficient of the brake pads does not mean that the larger the better the performance, the friction coefficient must be appropriate, too high or too low will affect the braking performance, especially when the car needs emergency braking during high-speed driving, ...

Claims

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Application Information

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IPC IPC(8): C08L33/20C08L77/10C08L61/14C08K13/04C08K7/14C08K7/04C08K3/34C08K3/22C08K3/30C08K3/04C08K3/26C08K7/24F16D69/02
CPCC08K2003/222C08K2003/265C08K2003/3009C08K2003/3045C08K2201/014C08L33/20C08L2201/08C08L2205/03C08L2205/16F16D69/023F16D69/028F16D2200/0008F16D2200/0052F16D2200/006F16D2200/0086C08L77/10C08L61/14C08K13/04C08K7/14C08K7/04C08K3/34C08K3/22C08K3/30C08K3/04C08K3/26C08K7/24
Inventor 耿浩洋
Owner SHANDONG DOUBLE LINK BRAKE MATERIAL
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