CN102364144B - Application of rice husks in preparation of brake pad, and friction material for brake pad - Google Patents
Application of rice husks in preparation of brake pad, and friction material for brake pad Download PDFInfo
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- CN102364144B CN102364144B CN2011102850327A CN201110285032A CN102364144B CN 102364144 B CN102364144 B CN 102364144B CN 2011102850327 A CN2011102850327 A CN 2011102850327A CN 201110285032 A CN201110285032 A CN 201110285032A CN 102364144 B CN102364144 B CN 102364144B
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Abstract
The invention discloses application of rice husks in preparation of a brake pad, and a friction material for preparing the brake pad. The brake pad is prepared by the following materials in percentage by weight according to a conventional brake pad pressing method: 10 to 15 percent of mineral fiber, 5 to 10 percent of graphite, 15 to 25 percent of barium sulfate, 15 to 20 percent of steel wool, 1 to 3 percent of friction enhancement agent, 3 to 15 percent of coke dust, 1 to 4 percent of tire powder, 7 to 11 percent of resin, 1 to 3 percent of butyl powder, 1 to 2 percent of calcium oxide and 5 to 30 percent of rice husk. In the friction material, the rice husks are used as a friction filling; and the brake pad made of the friction filling and other raw materials by using the conventional brake pad pressing method is subjected to a four-class test on a fixed speed experiment according to the standard GB5763-2008; the friction coefficient is stable, the wear rate is low, and the national standard can be met. The brake pad used in Santana, sonata and jetta taxies is stable in breaking and noise-free; and a vehicle with the brake pad can run as long as 35,000 kilometers or more.
Description
Technical field
The present invention relates to a kind of new application of rice husk, the particularly application in the preparation brake block, and a kind of brake block friction material that contains rice husk.
Background technique
Most important safety system on the automobile is exactly a braking system, and all brake members all are safety members.Brake block is one of link important in the whole braking system, and it can directly have influence on the reliability of whole braking system.Brake block and brake disc (or brake drum) mutual friction have mutually formed friction pair, produce braking moment, and the kinetic energy of automobile is changed into heat energy, and the temperature of brake block and brake disc can rise 300-400 ℃ during braking.Braking brake block and brake disc (or brake drum) are to bear the maximum element of pressure in the vehicle, and they are vulnerable to high temperature, the extreme heavy burden of machinery and chemistry.. in addition, brake block all is exposed under the influence of external environment for a long time, and such as humidity, dust and spot etc., these all can exert an influence to its performance and life-span.
The brake block dynamic friction coefficient has determined the size of braking force, and friction factor also plays a decisive role to the stability of vehicle operating in brake compensation and the braking.The reduction of friction factor can cause the sizable variation of braking ability, perhaps can cause stopping distance significantly to increase, and causes the threat of personal safety.Therefore the friction factor of brake block must guarantee stablizing under all driving conditions (speed, temperature, humidity, pressure) and in whole working life.Good brake block, friction factor must satisfy the brake requirement, and under various driving conditions, can keep stable.
Brake block generally is made up of steel backing, adhesive layer and friction layer.The friction material that constitutes friction layer comprises binder, fiber, filler, increases the materials such as agent and anti-friction composition that rub.According to the vehicle difference sometimes also needs add process treating such as damping pad, brush coating, fluting, mill oblique angle, purpose is in order to increase the usefulness of brake system.
Because brake block is easy to generate brake noise in braking process; So the use of filler must be considered noise reduction function in the friction material; The filler of widely used noise reduction function comprises intumescent material such as expanded vermiculite on the existing market, and expanded perlite, this material are that mineral are through refining processing mostly; Dust is very big in the course of working, and environmental pollution is serious.Granular material such as granular graphite etc. are to extract back processing through mineral to synthesize, and energy consumption is big in manufacture process, and dust is big, very easily causes operator's breathing problem.
Rice husk is one deck shell of paddy outside, can be used for cooking soy sauce, wine, fuel.Rice husk is formed also different because of the place of production is different; Its basic chemical composition is: moisture content accounts for 7.5%～15%, and crude fiber accounts for 35.5%～45%, and lignin accounts for 21%～26%; Crude protein accounts for 2.5%～3.0%; Lipid accounts for 0.7%～1.3%, and pentosan accounts for 16%～22%, and ash content accounts for 13%～22%.
Paddy rice is one of crops that cultivated area is the widest in the world, output is maximum.More than 600,000,000 ton of paddy of the annual production in the whole world.After paddy was processed into rice, the rice husk major part abandoned as refuse or as low grade fuel, many local peasants also can burn rice husk and straw together.Directly to the airborne release great amount of carbon dioxide, produce amounts of dust during burning, the dense smoke that produces during burning also can cause breathing problem.Above-mentioned these processing modes are befouling environment not only, and has caused the waste of resource.
Summary of the invention
The purpose of this invention is to provide the new application of a kind of rice husk in the preparation brake block.Because the characteristic of rice husk itself has big voidage, ash content of high-load (chemical composition of this ash content mainly is a silica) and abundant fiber, surface area is very big, has good noise abatement performance, very suitable friction filler as brake block.Rice husk is used to prepare brake block as filler,, reduces noise pollution guaranteeing friction factor and in the life-span, in the braking process of brake block, can effectively absorbing brake noise.
The present invention also provides a kind of friction material that is used to prepare brake block, it is characterized in that, is prepared from by conventional brake block drawing method following materials in weight portion: mineral fibre 10 ~ 15%, graphite 5-10%; Barium sulphate 15-25%, steel wool 15-20% increases grinding agent 1-3%; Coke powder 3-15%, tyre talc 1-4%, resin 7-11%; Butyronitrile powder 1-3%, calcium oxide 1-2%, rice husk 5-30%.
Further, the friction material that is used to prepare brake block preferably is prepared from by conventional brake block drawing method following materials in weight portion: mineral fibre 15%, graphite 10%; Barium sulphate 25%, steel wool 17% increases grinding agent 2%; Coke powder 10%, tyre talc 2%, resin 7%; Butyronitrile powder 1%, calcium oxide 1%, rice husk 10%.
Further, increasing grinding agent can be the material that chromite powder, aluminium oxide or zirconium oxide etc. increase friction factor.
Among the present invention, the rice husk raw material can carry out physics or chemical process, also can directly be pressed into brake block as brake block friction filler with other component without processing.
The rice husk porosity is high, density low (packing density is lower than 20g/100ml), and intensity is high, and wear resistance is good.Rice husk is used to prepare brake block, can reduces the weight of brake block, thereby the weight that alleviates automobile is that vehicle energy saving plays a role.
It is the friction filler that friction material of the present invention is selected rice husk for use;, press the GB5763-2008 standard and in the constant speed test, press 4 class testings by the brake block that conventional brake block drawing method is prepared from other raw material, friction factor is steady; Wear rate is little, is up to state standards fully.Through in Santana, to use in a large number on the taxi of Suo Nata and Jetta, braking does not steadily have the noise complaint, and the life-span reaches more than 35000 kilometers.
The rice husk apparent availability is big, and raw material is easy to get, low price, and as the friction filler of brake block friction material, market application foreground is boundless.
Among the present invention; The new purposes of rice husk in the preparation brake block can not only reduce pollution, environment purification; And can refuse be made full use of, can also reclaim the resource and the energy to create economic benefit, meet the fundamental state policy of national energy-saving and emission-reduction, utilization of waste as resource, sustainable development.
The not special restriction of conventional brake block drawing method, as long as each component is mixed, mixing, compacting and heat treated condition and equipment are conventionally known to one of skill in the art.For example: press temperature: 160 ℃; Pressure: 400MPa; The property compression moulding next time of the condition of time: 1min/mm.Heat treatment process: 170 ℃ of insulation 2h, 190 ℃ of insulation 3h.
Embodiment
Embodiment 1:
Mineral fibre 15%, graphite 10%, barium sulphate 25%, steel wool 17% increases grinding agent 2%, coke powder 15%, tyre talc 2%, resin 7%, butyronitrile powder 1%, calcium oxide 1%, rice husk 5%, total amount 100%.
Above-mentioned material is processed brake block according to conventional drawing method, press the GB5763-2008 standard and on the constant speed testing machine, press 4 class testings, the result is as shown in table 1.
Table 1:
Can find out from the data of table 1, the brake block that the embodiment of the invention 1 obtains, in the temperature rise period, friction factor is at 0.35-0.41, and the temperature-fall period friction factor is at 0.36-0.40, and wear rate is little, is up to state standards fully.Through in Santana, to use in a large number on the taxi of Suo Nata and Jetta, braking is steady, and brake noise is little, and the friction material life-span reaches more than 35000 kilometers.
Embodiment 2:
Mineral fibre 15%, graphite 10%, barium sulphate 25%, steel wool 17% increases grinding agent 2%, coke powder 10%, tyre talc 2%, resin 7%, butyronitrile powder 1%, calcium oxide 1%, rice husk 10%, total amount 100%.
Above-mentioned material is processed brake block according to conventional drawing method, press the GB5763-2008 standard and on the constant speed testing machine, press 4 class testings, as a result shown in the table 2.
Table 2:
Can find out from the data of table 2, the brake block that the embodiment of the invention 2 obtains, in the temperature rise period, friction factor is at 0.34-0.42, and the temperature-fall period friction factor is at 0.35-0.40, and wear rate is little, is up to state standards fully.Through in Santana, to use in a large number on the taxi of Suo Nata and Jetta, braking is steady, and brake noise is little, and the friction material life-span reaches more than 35000 kilometers.
Embodiment 3:
Mineral fibre 15%, graphite 10%, barium sulphate 20%, steel wool 15% increases grinding agent 2%, coke powder 5%, tyre talc 2%, resin 9%, butyronitrile powder 1%, calcium oxide 1%, rice husk 20%, total amount 100%.
Above-mentioned material is processed brake block according to conventional drawing method, press the GB5763-2008 standard and on the constant speed testing machine, press 4 class testings, as a result shown in the table 3.
Table 3:
Can find out from the data of table 3, the brake block that the embodiment of the invention 3 obtains, in the temperature rise period, friction factor is at 0.31-0.39, and the temperature-fall period friction factor is at 0.34-0.37, and wear rate is little, is up to state standards fully.Through in Santana, to use in a large number on the taxi of Suo Nata and Jetta, braking is steady, and brake noise is little, and the friction material life-span reaches more than 35000 kilometers.
Embodiment 4:
Mineral fibre 10%, graphite 5%, barium sulphate 15%, steel wool 20% increases grinding agent 2%, coke powder 3%, tyre talc 2%, resin 11%, butyronitrile powder 1%, calcium oxide 1%, rice husk 30%, total amount 100%.
Above-mentioned material is processed brake block according to conventional drawing method, press the GB5763-2008 standard and on the constant speed testing machine, press 4 class testings, as a result shown in the table 4.
Table 4:
Can find out from the data of table 4, the brake block that the embodiment of the invention 4 obtains, in the temperature rise period, friction factor is at 0.34-0.40, and the temperature-fall period friction factor is at 0.34-0.36, and wear rate is little, is up to state standards fully.Through in Santana, to use in a large number on the taxi of Suo Nata and Jetta, braking is steady, and brake noise is little, and the friction material life-span reaches more than 35000 kilometers.
Claims (3)
1. a friction material that is used to prepare brake block is characterized in that, is prepared from by conventional brake block drawing method following materials in weight portion: mineral fibre 10 ~ 15%, graphite 5-10%; Barium sulphate 15-25%, steel wool 15-20% increases grinding agent 1-3%; Coke powder 3-15%, tyre talc 1-4%, resin 7-11%; Butyronitrile powder 1-3%, calcium oxide 1-2%, rice husk 5-30%.
2. the friction material that is used to prepare brake block as claimed in claim 1 is characterized in that, is prepared from by conventional brake block drawing method following materials in weight portion: mineral fibre 15%, graphite 10%; Barium sulphate 25%, steel wool 17% increases grinding agent 2%; Coke powder 10%, tyre talc 2%, resin 7%; Butyronitrile powder 1%, calcium oxide 1%, rice husk 10%.
3. according to claim 1 or claim 2 the friction material that is used to prepare brake block is characterized in that the said grinding agent that increases is chromite powder, aluminium oxide or zirconium oxide.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011102850327A CN102364144B (en) | 2011-09-23 | 2011-09-23 | Application of rice husks in preparation of brake pad, and friction material for brake pad |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011102850327A CN102364144B (en) | 2011-09-23 | 2011-09-23 | Application of rice husks in preparation of brake pad, and friction material for brake pad |
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| CN102364144B true CN102364144B (en) | 2012-11-28 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103820078B (en) * | 2012-12-27 | 2015-06-17 | 盐城市鑫浩机械制造有限公司 | Method for preparing brake pad friction material by using rice and wheat straws |
| CN103382977B (en) * | 2013-01-23 | 2016-01-27 | 杭州优纳摩擦材料有限公司 | A kind of industrial brake facing for wind power yawing system |
| CN103527683B (en) * | 2013-10-18 | 2016-05-04 | 江苏祥龙摩擦材料有限公司 | A kind of without metal carbon ceramics disc brake pad and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH03185031A (en) * | 1989-12-14 | 1991-08-13 | Nisshinbo Ind Inc | Nonasbestos-based friction material |
| JP2000179599A (en) * | 1998-12-15 | 2000-06-27 | Akebono Brake Ind Co Ltd | Friction material for brake |
| CN101956775B (en) * | 2010-05-20 | 2012-08-08 | 湖南博云汽车制动材料有限公司 | Resin-based yawing brake pad for wind-generated generator and preparation method thereof |
| CN102180618B (en) * | 2011-02-16 | 2012-10-31 | 杭州优纳摩擦材料有限公司 | Friction material for preparing NAO brake pad |
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