CN101876011A - Copper-base powder metallurgy brake pad for high-power wind turbine generator sets and preparation technique thereof - Google Patents
Copper-base powder metallurgy brake pad for high-power wind turbine generator sets and preparation technique thereof Download PDFInfo
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- CN101876011A CN101876011A CN2009103111838A CN200910311183A CN101876011A CN 101876011 A CN101876011 A CN 101876011A CN 2009103111838 A CN2009103111838 A CN 2009103111838A CN 200910311183 A CN200910311183 A CN 200910311183A CN 101876011 A CN101876011 A CN 101876011A
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Abstract
The invention relates to a copper-base powder metallurgy brake pad which is composed of copper, graphite, sea sand, ferrochromium, tin and ferrosilicon. The preparation technique comprises the following steps: weighing the powder components according to the proportion, incorporating zinc stearate and aviation kerosene, and evenly mixing; pressing into a pressed compact; and putting the pressed compact on a steel backing of which the surface is plated with copper, covering a graphite plate on the surface of the pressed compact, pressure-sintering in a sintering furnace in a gradient-temperature gradient-pressure mode, cooling in a water-cooling hood to room temperature, and discharging to obtain the copper-base powder metallurgy brake pad blank. The invention has the advantages of reasonable component proportioning, convenient manufacture, favorable wearability and long service life; the service life and braking performance of the brake pad can meet the braking requirements for a high speed shaft in the wind turbine generator set of which the power is greater than 2.5 MW; and the brake pad can be industrially produced, and has wide industrialization prospects.
Description
Technical field:
The present invention relates to a kind of powder metallurgy brake pad and preparation technology, be meant a kind of high-power wind turbine unit copper-base powder metallurgy brake pad and preparation technology thereof especially; Be a kind of high performance and long service life copper-base powder metallurgy brake pad and preparation technology who is applied to the high-power wind turbine unit specifically, belong to powder metallurgical technology.
Background technology:
Wind energy is known as " blue sky anthracite ", is one of whole world renewable energy source of attracting attention.The development of high-power homemade wind power generating set (more than the 2.5MW) and use are listed in Eleventh Five-Year Plan national science and technology supporting plan major project, are the important leverages that China's realization the year two thousand fifty wind-powered electricity generation accounts for the great-leap-forward development plan realization of the total electric weight 10% in the whole nation.High speed shaft braking in the wind-powered electricity generation unit has the outstanding feature of " three height (high torque and high pressure at a high speed) special (special wind sand environment) " with friction pair, adopting powder metallurgy friction material pairing structural alloy steel to join pair on the application choice of friction pair material, is the security of high-power wind turbine unit and the important leverage system of reliability.Brake pad is the attrition component in the high-power wind turbine unit drift stop, needs periodic replacement.The powder metallurgy brake pad material is one of critical material in the high-power wind turbine unit drift stop, utilize the brake pad material and the frictional force of pairing disc material to make the kinetic energy of high-power wind turbine unit change the energy of heat energy and other form into, be dispersed in the air, thereby make drift stop reach arresting effect.
The main powder metallurgy brake lining that uses of high-power wind turbine unit braking at present.Existing powder metallurgy does not generally design special wear-resisting wiping component owing at the material design aspect, do not consider arresting harsh the requirement and high frictional coefficient of wind-powered electricity generation.Exist damping force deficiency, poor reliability, work-ing life short and to technological deficiencies such as the retarding disc damage are big.
Summary of the invention
The objective of the invention is to overcome the deficiency of prior art and provide that a kind of reasonable mixture ratio of components, convenient processing and manufacture, wear resistance are good, the high-power wind turbine unit of long service life is with copper-base powder metallurgy brake pad and preparation technology thereof.
A kind of high-power wind turbine unit copper-base powder metallurgy brake pad of the present invention, by the percentage composition by weight of following component:
Copper 65～75
Graphite 10～15
Sea sand 1～3
Ferrochrome 10～15
Tin 1～3
Ferrosilicon 1～3.
A kind of high-power wind turbine unit of the present invention copper-base powder metallurgy brake pad preparation technology comprises step:
The first step: preparation brake pad material compound
According to the total mass of compound by concrete set of dispense than the powder that takes by weighing each component, mix the Zinic stearas and the aviation kerosene of compound total mass 1～2%, mix;
Second step: produce powder compact
The first step gained compound is poured in the die cavity of pressing mold,, made pressed compact with the compacting of 350～600MPa pressure;
The 3rd step: support steel backing and prepare
Adopt steel plate process support steel backing, supporting the copper facing of steel backing surface electrical, electrolytic coating thickness 10～20 μ m;
The 4th step: the pressure sintering of powder compact
The second step gained powder compact is positioned on the prescribed position of steel backing, graphite cake is covered on described powder compact, insert and carry out pressure sintering in the sintering oven; Pressure sintering technology is as follows: furnace pressure: furnace temperature is below 700 ℃, and the control furnace pressure is 1.0～2MPa, 700 ℃ to 950 ℃ of furnace temperature, and the control furnace pressure is: 2～3MPa; Furnace atmosphere: hydrogen shield atmosphere; Temperature increasing schedule: be warming up to 600～620 ℃ with 5～10 ℃/minute speed, then, be warming up to 850～950 ℃, be incubated and add water-cooling cover after 2～4 hours and be cooled to normal temperature with 2～5 ℃/minute speed, come out of the stove, promptly obtain copper-base powder metallurgy brake pad base of the present invention.
The present invention adopts said components prescription and complete processing by material design and manufacturing process research, with respect to existing powder metallurgy brake lining material and technology of preparing, has the following advantages:
1, adopt aviation kerosene and Zinic stearas as binder mixture, on the one hand, aviation kerosene can effectively improve graphite blended homogeneity, and on the other hand, Zinic stearas can improve the adhesive property of material, guarantees that the material pressing process does not ftracture;
2, at the material design aspect, adopted high-content macrobead ferrochrome as the friction constituent element, mixing of macrobead ferrochrome, can effectively improve the wear resistance of material, enough and stable frictional coefficient have been obtained, overcome and adopted small-particle low levels ferrochrome in the past, material can not satisfy the drawback of service requirements, and the material that the present invention is obtained has high, stable frictional coefficient and high braking moment;
3, in order to adopt gradient increased temperature and classification pressure sintering technology, can guarantee each composition constituent element sufficient reacting and guarantee that brake pad keeps homogeneous deformation at thickness direction in sintering process, avoid taking place the bulging phenomenon, guarantee that effectively the densification of brake lining material and each constituent element of material fully react; Prepared product property parameter reaches: density (g/cm
3): 4.8-6.8; Brinell hardness (HB): 0-50; Ultimate compression strength (MPa): 〉=80; Porosity (%)＜2.0; Satisfy power fully greater than 2.5MW wind-powered electricity generation unit high speed shaft brake request.
In sum, reasonable mixture ratio of components of the present invention, convenient processing and manufacture, good, the long service life of wear resistance; Its work-ing life and braking ability can satisfy power greater than 2.5MW wind-powered electricity generation unit high speed shaft brake request, can realize suitability for industrialized production, and industrialization prospect is good.
Embodiment
The specific embodiment of the present invention describes in detail below in conjunction with embodiment,
Embodiment 1
The brake material constituent element is (weight percent): copper 70, graphite 11, extra large sand 2, tin 3, ferrochrome 11, ferrosilicon 3.
Manufacturing process is as follows:
Zinic stearas=1: 1) and adopt the three-dimensional blender device to mix after mixing by proportioning, each component mixes the aviation kerosene of compound total mass 1～2% and Zinic stearas (aviation kerosene:; Compound is pressed into powder compact with 600MPa pressure; Adopt No. 45 steel plates of thickness 2.5mm to be processed into steel backing, copper facing, thickness of coating 10～20 μ m; Pressed compact pressure sintering technology is as follows: furnace pressure is: furnace temperature is below 700 ℃, and the control furnace pressure is 1.0MPa, 700 ℃ to 850 ℃ of furnace temperature, and the control furnace pressure is: 2MPa; Furnace atmosphere: hydrogen shield atmosphere; Temperature increasing schedule is: be warming up to 600 ℃ with 5 ℃/minute speed, then, be warming up to 850 ℃ with 2 ℃/minute speed, be incubated and add water-cooling cover after 2 hours and be cooled to normal temperature, come out of the stove; Resulting copper-base powder metallurgy brake pad base, performance perameter is: density (g/cm
3): 6.1～6.3; Brinell hardness (HB): 20～40; Ultimate compression strength (MPa): 100～120; Porosity (%): 1.6～1.8; At rotation speed n=6500rpm, inertia J=1.0kg.cm.s
2, brake pressure P=1.0MPa brakes 10 times, and average friction coefficient is: μ=0.40～0.45;
With the copper-base powder metallurgy brake pad base of present embodiment preparation by product size requirements processing after, be applied to the braking of 2.5MW wind-powered electricity generation unit high speed shaft, through the reality application test of installing, meet design requirement fully.
Embodiment 2:
The brake material constituent element is (weight percent): copper 75, graphite 10, extra large sand 3, tin 1, ferrochrome 10, ferrosilicon 1.
Manufacturing process is as follows:
Zinic stearas=1: 1) and adopt the three-dimensional blender device to mix after mixing by proportioning, each component mixes the aviation kerosene of compound total mass 1～2% and Zinic stearas (aviation kerosene:; Compound is with pressing pressure 500MPa shaping powder compact; Adopt No. 45 steel plates of thickness 2.5mm to be processed into steel backing, copper facing, thickness of coating 10～20 μ m; Pressed compact pressure sintering technology is as follows: furnace pressure is: furnace temperature is below 700 ℃, and the control furnace pressure is 1.5MPa, 700 ℃ to 850 ℃ of furnace temperature, and the control furnace pressure is: 2.5MPa; Furnace atmosphere: hydrogen shield atmosphere; Temperature increasing schedule is: be warming up to 610 ℃ with 7 ℃/minute speed, then, be warming up to 900 ℃ with 3 ℃/minute speed, be incubated and add water-cooling cover after 3 hours and be cooled to normal temperature, come out of the stove; Resulting copper-base powder metallurgy brake pad base, performance perameter is: density (g/cm
3): 6.3～6.7; Brinell hardness (HB): 20～40; Ultimate compression strength (MPa): 100～120; Porosity (%): 1.5～1.7. is at rotation speed n=6500rpm, inertia J=1.0kg.cm.s
2, brake pressure P=1.0MPa brakes 10 times, and average friction coefficient is: μ=0.38～0.43;
With the copper-base powder metallurgy brake pad base of present embodiment preparation by product size requirements processing after, be applied to the braking of 2.5MW wind-powered electricity generation unit high speed shaft, through the reality application test of installing, meet design requirement fully.
Embodiment 3:
The brake material constituent element is (weight percent): 65 bronze medals, 15 graphite, 1 extra large sand, 2 tin, 15 ferrochrome, 2 ferrosilicon.
Manufacturing process is as follows:
Zinic stearas=1: 1) and adopt the three-dimensional blender device to mix after mixing by proportioning, each component mixes the aviation kerosene of compound total mass 1～2% and Zinic stearas (aviation kerosene:; Compound is with pressing pressure 350MPa shaping powder compact; Adopt No. 45 steel plates of thickness 2.5mm to be processed into steel backing, copper facing, thickness of coating 10～20 μ m; Pressed compact pressure sintering technology is as follows: furnace pressure is: furnace temperature is below 700 ℃, and the control furnace pressure is 2MPa, 700 ℃ to 850 ℃ of furnace temperature, and the control furnace pressure is: 3MPa; Furnace atmosphere: hydrogen shield atmosphere; Temperature increasing schedule is: be warming up to 620 ℃ with 10 ℃/minute speed, then, be warming up to 950 ℃ with 5 ℃/minute speed, be incubated and add water-cooling cover after 3 hours and be cooled to normal temperature, come out of the stove; Resulting copper-base powder metallurgy brake pad base, performance perameter is: density (g/cm
3): 5.2～6.0; Brinell hardness (HB): 30～50; Ultimate compression strength (MPa): 110～130; Porosity (%): 1.5～1.8; At rotation speed n=6500rpm, inertia J=1.0kg.cm.s
2, brake pressure P=1.0MPa brakes 10 times, and average friction coefficient is: μ=0.36～0.40;
With the copper-base powder metallurgy brake pad base of present embodiment preparation by product size requirements processing after, be applied to the braking of 2.5MW wind-powered electricity generation unit high speed shaft, through the reality application test of installing, meet design requirement fully.
Claims (2)
1. high-power wind turbine unit copper-base powder metallurgy brake pad, by the percentage composition by weight of following component:
Copper 65～75
Graphite 10～15
Sea sand 1～3
Ferrochrome 10～15
Tin 1～3
Ferrosilicon 1～3.
2. prepare the technology of this copper-base powder metallurgy brake pad according to claim 1, may further comprise the steps:
The first step: preparation brake pad material compound
According to the total mass of compound by concrete set of dispense than the powder that takes by weighing each component, mix the Zinic stearas and the aviation kerosene of compound total mass 1～2%, mix;
Second step: produce powder compact
The first step gained compound is poured in the die cavity of pressing mold,, made pressed compact with the compacting of 350～600MPa pressure;
The 3rd step: support steel backing and prepare
Adopt steel plate process support steel backing, supporting the copper facing of steel backing surface electrical, electrolytic coating thickness 10～20 μ m;
The 4th step: the pressure sintering of powder compact
The second step gained powder compact is positioned on the prescribed position of steel backing, graphite cake is covered on described powder compact, insert and carry out pressure sintering in the sintering oven; Pressure sintering technology is as follows: furnace pressure: furnace temperature is below 700 ℃, and the control furnace pressure is 1.0～2MPa, 700 ℃ to 950 ℃ of furnace temperature, and the control furnace pressure is: 2～3MPa; Furnace atmosphere: hydrogen shield atmosphere; Temperature increasing schedule: be warming up to 600～620 ℃ with 5～10 ℃/minute speed, then, be warming up to 850～950 ℃, be incubated and add water-cooling cover after 2～4 hours and be cooled to normal temperature with 2～5 ℃/minute speed, come out of the stove, promptly obtain copper-base powder metallurgy brake pad base of the present invention.
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| CN2009103111838A CN101876011B (en) | 2009-12-10 | 2009-12-10 | Copper-base powder metallurgy brake pad for high-power wind turbine generator sets and preparation technique thereof |
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| CN2009103111838A CN101876011B (en) | 2009-12-10 | 2009-12-10 | Copper-base powder metallurgy brake pad for high-power wind turbine generator sets and preparation technique thereof |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102002609A (en) * | 2010-12-07 | 2011-04-06 | 中南大学 | Copper-base powder metallurgical brake pad material for sea-base wind turbine generator system and preparation process thereof |
| CN102653670A (en) * | 2011-03-02 | 2012-09-05 | 北京古特莱航空科技发展有限公司 | Metal ceramic friction material and preparation method thereof |
| CN102676871A (en) * | 2011-03-09 | 2012-09-19 | 北京古特莱航空科技发展有限公司 | Sintered friction material for brake of wind power generation equipment and its preparation method |
| CN103567448A (en) * | 2013-10-10 | 2014-02-12 | 铜陵国方水暖科技有限责任公司 | Powder metallurgy wind power pivoting support and preparation method thereof |
| CN103639404A (en) * | 2013-11-29 | 2014-03-19 | 国网河南省电力公司平顶山供电公司 | Brake pad material for high-power wind turbine generator and preparation process thereof |
| CN103785824A (en) * | 2013-12-12 | 2014-05-14 | 北京百慕航材高科技股份有限公司 | Powder metallurgy friction pair for braking of heavy-load vehicle and preparation technology thereof |
| CN106424709A (en) * | 2016-10-21 | 2017-02-22 | 广西南宁智翠科技咨询有限公司 | High hardness powder metallurgy material for train brake lining |
| CN106424710A (en) * | 2016-10-21 | 2017-02-22 | 广西南宁智翠科技咨询有限公司 | High compression resistant strength powder metallurgy material for train brake lining |
| CN107523716A (en) * | 2016-06-17 | 2017-12-29 | 贺尔碧格传动技术控股有限公司 | Sintered friction material for friction facing |
| CN109807321A (en) * | 2019-03-27 | 2019-05-28 | 山东百德瑞轨道交通科技有限公司 | A kind of high-performance wind-power high speed shaft brake(-holder) block and preparation method thereof |
| CN112342429A (en) * | 2020-10-19 | 2021-02-09 | 北京瑞斯福高新科技股份有限公司 | Powder metallurgy connecting material and using method thereof |
| CN112517904A (en) * | 2020-11-27 | 2021-03-19 | 无锡科宇模具有限公司 | Preparation method of tough anti-friction part |
| CN112981171A (en) * | 2021-03-16 | 2021-06-18 | 郑州轻工业大学 | Copper-based powder metallurgy friction material containing mixed graphite and preparation method |
| EP4202219A1 (en) * | 2021-12-22 | 2023-06-28 | Global Tech I Offshore Wind GmbH | Brake device for a wind turbine and method for increasing the wear resistance and minimizing the brake dust attack in such a brake device |
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2009
- 2009-12-10 CN CN2009103111838A patent/CN101876011B/en active Active
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102002609A (en) * | 2010-12-07 | 2011-04-06 | 中南大学 | Copper-base powder metallurgical brake pad material for sea-base wind turbine generator system and preparation process thereof |
| CN102653670A (en) * | 2011-03-02 | 2012-09-05 | 北京古特莱航空科技发展有限公司 | Metal ceramic friction material and preparation method thereof |
| CN102676871A (en) * | 2011-03-09 | 2012-09-19 | 北京古特莱航空科技发展有限公司 | Sintered friction material for brake of wind power generation equipment and its preparation method |
| CN103567448A (en) * | 2013-10-10 | 2014-02-12 | 铜陵国方水暖科技有限责任公司 | Powder metallurgy wind power pivoting support and preparation method thereof |
| CN103639404A (en) * | 2013-11-29 | 2014-03-19 | 国网河南省电力公司平顶山供电公司 | Brake pad material for high-power wind turbine generator and preparation process thereof |
| CN103785824A (en) * | 2013-12-12 | 2014-05-14 | 北京百慕航材高科技股份有限公司 | Powder metallurgy friction pair for braking of heavy-load vehicle and preparation technology thereof |
| CN107523716A (en) * | 2016-06-17 | 2017-12-29 | 贺尔碧格传动技术控股有限公司 | Sintered friction material for friction facing |
| CN107523716B (en) * | 2016-06-17 | 2021-11-02 | 贺尔碧格传动技术控股有限公司 | Sintered friction material for friction linings |
| CN106424710A (en) * | 2016-10-21 | 2017-02-22 | 广西南宁智翠科技咨询有限公司 | High compression resistant strength powder metallurgy material for train brake lining |
| CN106424709A (en) * | 2016-10-21 | 2017-02-22 | 广西南宁智翠科技咨询有限公司 | High hardness powder metallurgy material for train brake lining |
| CN109807321A (en) * | 2019-03-27 | 2019-05-28 | 山东百德瑞轨道交通科技有限公司 | A kind of high-performance wind-power high speed shaft brake(-holder) block and preparation method thereof |
| CN109807321B (en) * | 2019-03-27 | 2021-04-13 | 山东百德瑞轨道交通科技有限公司 | High-performance wind power high-speed shaft brake pad and preparation method thereof |
| CN112342429A (en) * | 2020-10-19 | 2021-02-09 | 北京瑞斯福高新科技股份有限公司 | Powder metallurgy connecting material and using method thereof |
| CN112517904A (en) * | 2020-11-27 | 2021-03-19 | 无锡科宇模具有限公司 | Preparation method of tough anti-friction part |
| CN112981171A (en) * | 2021-03-16 | 2021-06-18 | 郑州轻工业大学 | Copper-based powder metallurgy friction material containing mixed graphite and preparation method |
| CN112981171B (en) * | 2021-03-16 | 2022-06-17 | 郑州轻工业大学 | Copper-based powder metallurgy friction material containing mixed graphite and preparation method |
| EP4202219A1 (en) * | 2021-12-22 | 2023-06-28 | Global Tech I Offshore Wind GmbH | Brake device for a wind turbine and method for increasing the wear resistance and minimizing the brake dust attack in such a brake device |
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