Synthetic brake shoe for urban railway vehicle and preparation method thereof

A technology for synthesizing brake shoes and urban rail vehicles, which is applied in the field of rail transit vehicle accessories, can solve the problems of brake shoe braking performance degradation, aramid pulp easy agglomeration, and mechanical performance degradation, and achieve easy control, high strength and moldability The effect of less quantity and defects

Inactive Publication Date: 2011-07-27
DALIAN JIAOTONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, phenolic resin is easy to decompose at high temperature, so that its mechanical properties will decline during use.
At the same time, the addition of steel fibers will cause noise, and aramid pulp is easy to agglomerate during the mixing process, which will cause the braking performance of the brake shoe to decrease and become unstable, which is also a recognized technical problem.

Method used

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  • Synthetic brake shoe for urban railway vehicle and preparation method thereof
  • Synthetic brake shoe for urban railway vehicle and preparation method thereof
  • Synthetic brake shoe for urban railway vehicle and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The composition (percentage by weight) of synthetic brake shoes for urban rail vehicles is as follows:

[0026] Component Weight percent

[0027] Polybismaleimide resin 12%

[0028] Nitrile Rubber 10%

[0029] Graphite 18%

[0030] Iron powder 10%

[0031] Wollastonite 8%

[0032] Friction powder 10%

[0033] Barite 30%

[0034] Coupling agent (commercially available NANDA-42) 2%

[0035] Mix the raw materials uniformly in proportion for 20 minutes, put the mixed plastic into the mold for hot pressing, and the process parameters are: temperature 220°C, pressure 40MPa, time 1.2min / mm. Finally, the molded product is put into a heat treatment furnace, and finally heat treated at 220° C. for 10 hours to obtain a product.

[0036] The friction and wear test was carried out on a GF150D constant speed friction machine, the friction pressure was 0.57MPa, the material of the friction disc was H13, the friction radius was 150mm, and the adjustable speed range was 0-3000r / ...

Embodiment 2

[0042] The composition (percentage by weight) of synthetic brake shoes for urban rail vehicles is as follows:

[0043] Component Weight percent

[0044] Polybismaleimide resin 14%

[0045] Nitrile Rubber 14%

[0046] Graphite 18%

[0047] Iron powder 4%

[0048] Wollastonite 8%

[0049] Friction powder 10%

[0050] Barite 30%

[0051] Coupling agent (commercially available NANDA-42) 2%

[0052] The preparation method is the same as in Example 1, wherein the process parameters of hot pressing are: temperature 220° C., pressure 40 MPa, time 1.5 min / mm. Finally, the molded product is put into a heat treatment furnace, and finally heat treated at 220° C. for 10 hours to obtain a product.

[0053] The synthetic brake shoe of urban rail vehicle that makes adopts GF150D type constant speed friction machine to test, and concrete test operation is with embodiment 1, and test result is as follows:

[0054] The friction and wear data of table 2 embodiment 2

[0055]

Embodiment 3

[0057] The composition (percentage by weight) of synthetic brake shoes for urban rail vehicles is as follows:

[0058]Component Weight percent

[0059] Polybismaleimide resin 10%

[0060] Nitrile Rubber 14%

[0061] Graphite 12%

[0062] Iron powder 7%

[0063] Wollastonite 8%

[0064] Friction powder 10%

[0065] Barite 37%

[0066] Coupling agent (commercially available NANDA-42) 2%

[0067] The preparation method is the same as in Example 1, wherein the process parameters of hot pressing are: temperature 220° C., pressure 40 MPa, time 1.5 min / mm. Finally, the molded product is put into a heat treatment furnace, and finally heat treated at 220° C. for 10 hours to obtain a product.

[0068] The synthetic brake shoe of urban rail vehicle that makes adopts GF150D type constant speed friction machine to test, and concrete test operation is with embodiment 1, and test result is as follows:

[0069] The friction and wear data of table 3 embodiment 3

[0070]

[0071] ...

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Abstract

The invention discloses a synthetic brake shoe for an urban railway vehicle and a preparation method thereof. The synthetic brake shoe for an urban railway vehicle is prepared from acicular wollastonite used as a reinforcing material, polybismaleimide resin used as a base material, and a filling and frictional property regulator by a hot pressing technique. The synthetic brake shoe for an urban railway vehicle is prepared from 8-16% of polybismaleimide resin, 6-14% of nitrile-butadiene rubber, 12-24% of graphite, 4-16% of iron powder, 4-12% of wollastonite, 6-14% of friction powder, 21-39% ofbarite and 0-6% of coupling agent. The synthetic brake shoe for an urban railway vehicle has the advantages of stable friction factor, wear resistance, low abrasion, no cracking or metal inlay, favorable weather resistance and low noise, does not damage wheels, does not pollute the city, and can satisfy the operational requirements for urban railway trains.

Description

technical field [0001] The invention relates to the field of rail transit vehicle accessories, in particular to a synthetic brake shoe for urban rail vehicles and a manufacturing method thereof. Background technique [0002] At present, rail transportation is developing in the direction of high speed and heavy load. Based on safety considerations, the requirements for brake shoes are also getting higher and higher. In the case of urban rail vehicle braking, the working temperature of the brake shoe surface can reach 500°C or even higher. This requires brake shoe materials with high temperature resistance and high wear resistance to maintain the stability of the braking performance of urban rail vehicles and ensure driving safety. Braking materials widely used in the railway sector mainly include high-phosphorus cast iron brake shoes, polymer-based synthetic brake shoes and copper-based powder metallurgy brake shoes. Early high-phosphorus cast iron brake shoes were used in ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L79/08C08L9/02C08K3/04C08K3/08C08K3/34C08K3/30B61H1/00F16D69/02B29C43/58B29C71/02
Inventor 陆兴王才朋覃作祥
Owner DALIAN JIAOTONG UNIVERSITY
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