CN109807321A - A kind of high-performance wind-power high speed shaft brake(-holder) block and preparation method thereof - Google Patents
A kind of high-performance wind-power high speed shaft brake(-holder) block and preparation method thereof Download PDFInfo
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- CN109807321A CN109807321A CN201910237763.0A CN201910237763A CN109807321A CN 109807321 A CN109807321 A CN 109807321A CN 201910237763 A CN201910237763 A CN 201910237763A CN 109807321 A CN109807321 A CN 109807321A
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Abstract
The invention discloses a kind of high-performance wind-power high speed shaft brake(-holder) blocks and preparation method thereof.The friction material is made of the raw material of following mass percentage composition: copper powder 50~80%；Iron powder 1~6%；High carbon ferro-chrome 3~10%；Cu-cladding Al Rod 8~20%；Copper alloy powder 8~20%.Wind turbines provided by the invention high speed shaft brake(-holder) block, the mechanism of action that friction material therein passes through research each component, carry out rational proportion, Optimizing Process Parameters, adjust the content and existence form of control each component, keep brake lining carrying reasonable, perfect heat-dissipating, gained brake pad has with friction material stablizes suitable friction factor, intensity is high, wearability is good, the specific heat capacity and density of material are big, more frictional heat can be absorbed in unit volume, the peakload in operating condition can effectively be undertaken, good heat conductivity, high temperature resistant when military service, functional reliability is high, the materials'use service life is long, reduce maintenance frequency, significantly improve the generating efficiency of blower.
Description
Technical field
The present invention relates to a kind of high-performance wind-power high speed shaft brake(-holder) blocks and preparation method thereof.
Background technique
High speed shaft brake(-holder) block is component part indispensable in Wind turbines, and performance directly affects the reliable of unit
Property and safety.With the fast development of Wind Power Generation Industry, Wind turbines develop towards high speed, the high direction carried, Wind turbines system
Movable plate damage is one of the main reason for Wind turbines generate failure.
The main performance deficiency of current state's internal friction materials is: material compressive strength is poor, high temperature when be easily deformed and the system that rubs
Number is unstable, noise pollution is serious.Heavy metal Pb generally existing in friction material is also quite tight to the pollution of environment simultaneously
Weight, is unable to satisfy development of modern industry and environmental requirement, the wind-powered electricity generation friction plate on domestic market is import, and price is very
It is high.
Summary of the invention
The object of the present invention is to provide a kind of high-performance wind-power high speed shaft brake(-holder) block and preparation method thereof, the brake(-holder) block tool
There is stable friction factor, intensity is high, and wearability is good, and the thermal conductivity of friction block therein is good, and performance is stablized, and the service life is long, significantly
Improve the generating efficiency of blower.
Wind-powered electricity generation high speed shaft brake(-holder) block friction material provided by the present invention, by the raw material system of following mass percentage composition
At:
Copper powder 50~80%；
Iron powder 1~6%；
High carbon ferro-chrome 3~10%；
Cu-cladding Al Rod 8~20%；
Copper alloy powder 8~20%；
Concretely:
Copper powder 67%；
Iron powder 3%；
High carbon ferro-chrome 5%；
Cu-cladding Al Rod 15%；
Copper alloy powder 10%.
The present invention, as raw material, it is bad to solve the problems, such as that graphite is combined with copper wetting, while product using Cu-cladding Al Rod
Briquetting pressure is reduced to 2Mpa by 5MPa, after reducing briquetting pressure, can not only reduce pressing process energy consumption, more improve shaping mould
Has the service life.According to product testing, originaling forming die life is 1.5 ten thousand times, be can reach after pressure reduction 2.5 ten thousand times.
On the basis of the friction material, invention further provides a kind of preparation sides of wind-powered electricity generation high speed shaft brake(-holder) block
Method includes the following steps:
1) raw material of the friction material is mixed with lubricant and binder, it is then repressed to obtain friction block green body；
2) the friction block green body is placed on steel backing plate, carries out pressure sintering and obtains friction block；
The copper coating of the steel backing plate；
3) friction block is carried out melting infiltration processing to get the wind-powered electricity generation high speed shaft brake(-holder) block is arrived.
In above-mentioned preparation method, in step 1), the lubricant can be zinc stearate or micro mist wax；
The binder can be kerosene or atoleine；
The dosage of the lubricant can be the 0.2%~1.5% of the material quality of the friction material；
The dosage of the binder can are as follows: the raw material of friction material described in 1~10ml/kg.
In above-mentioned preparation method, in step 1), the mixed time be 2~8 hours, can in three-dimensional material mixer into
Row mixing.
In above-mentioned preparation method, in step 2), the steel backing plate is equipped with several grooves, and the groove rubs with described
The protrusion of cleaning block green compact matches, and cooperation in this way can play the work for enhancing the adhesion strength of the steel backing plate and the friction block
With.
In above-mentioned preparation method, in step 2), the condition of the pressure sintering is as follows:
Atmosphere is reducing atmosphere；
Pressure is 0.5~2.5MPa；
Temperature is 900~990 DEG C；
The heat-insulation pressure keeping time is 2.5~3.5h；
It is cooled down after heat-insulation pressure keeping.
In above-mentioned preparation method, in step 3), described melt seeps the mass percentage composition for melting infiltration material that processing uses
It is as follows:
Copper-tin alloy powder 90~95%；
Iron powder 5~10%；
Concretely:
Copper-tin alloy powder 93%；
Iron powder 7%；
It comprises the concrete steps that: melting infiltration material described in being put into and suppress on the friction block surface, carry out in a reducing atmosphere
High temperature sintering.
In above-mentioned preparation method, in step 3), the condition for melting infiltration processing is as follows:
Sintering temperature is 850 DEG C~950 DEG C；
Sintering time is 0.5~2h；
The wind-powered electricity generation high speed shaft brake(-holder) block is obtained after cooling.
The wind-powered electricity generation high speed shaft brake(-holder) block that the above method is prepared also belongs to protection scope of the present invention.
In the present invention, after the completion of friction material is sintered for the first time, addition is melted the secondary cementation process that melts of infiltration material progress and is handled, and is formed
Continuous and firm metal connects phase, effectively increases the mechanical property of friction material.
Wind turbines provided by the invention high speed shaft brake(-holder) block, the effect that friction material therein passes through research each component
Mechanism, carry out rational proportion, Optimizing Process Parameters, adjust control each component content and existence form, make brake lining carrying rationally,
Perfect heat-dissipating, gained brake pad friction material, which has, stablizes suitable friction factor, and intensity is high, and wearability is good, material
Specific heat capacity and density it is big, more frictional heat can be absorbed in unit volume, can effectively undertake the spike in operating condition
Load, good heat conductivity, high temperature resistant when military service, functional reliability is high, and the materials'use service life is long, reduces maintenance frequency, significantly
Improve the generating efficiency of blower.
Detailed description of the invention
Fig. 1 is schematic diagram when rubbing block green body and steel back cooperation.
Specific embodiment
Experimental method used in following embodiments is conventional method unless otherwise specified.
The materials, reagents and the like used in the following examples is commercially available unless otherwise specified.
Embodiment 1,
The main composition for the friction material that the present embodiment uses is as follows:
Copper powder 67%；Iron powder 3%；High carbon ferro-chrome 5%；Cu-cladding Al Rod 15%；Ormolu powder 10%.
High-performance wind-power high speed shaft brake(-holder) block is prepared as steps described below:
(1) mixing: the powder raw material proportionally weighing of above-mentioned friction material, it is put into three-dimensional material mixer, is added into
0.45% zinc stearate and the kerosene (with the ratio in friction material powder raw material) of 5ml/kg, mixing 4 hours.
(2) friction block is suppressed: mixed material being put into mold according to weight is calculated, is pressed into friction block green body；
Wherein, for Cu-cladding Al Rod as raw material, briquetting pressure is down to 2Mpa by 5Mpa, not only can be with after reducing briquetting pressure
Pressing process energy consumption is reduced, the molding die service life is more improved.Through testing, originaling forming die life is 1.5 ten thousand times, pressure drop
It can reach after low 2.5 ten thousand times.
(3) brake(-holder) block is sintered: as shown in Figure 1, friction block green body 3 is placed in sequence on the steel backing plate 1 after copper facing, being rubbed
Groove 2 on 3 high spot of cleaning block green compact and steel backing plate corresponds, to make rub block green body 3 and the cooperation of groove 2, is added
Pressure sintering, atmosphere are hydrogen, and pressure 1.0MPa, sintering temperature is 900 DEG C, and heat-insulation pressure keeping 3h, furnace cooling is rubbed
Block.
(4) melt infiltration processing: the above-mentioned brake(-holder) block friction block surface being prepared be put into suppress melt seep material (copper and tin
Alloyed powder: 93%, iron powder: 7%), high-temperature process is carried out in the reducing atmosphere (hydrogen), and sintering temperature is 885 DEG C, and the time is
1h, the wind-powered electricity generation high speed shaft brake(-holder) block of performance required for being obtained after cooling.
Brake(-holder) block prepared by the present embodiment extracts the square sample block of 3 pieces of 20mm × 15mm, in MM3000 friction-test instrument
Friction test is carried out, the highest friction temperature of product is reduced to 500 DEG C by 550 DEG C of conventional friction material, the shear strength of material
It is improved by 8MPa to 12MPa, compressive strength is improved by 110MPa to 160MPa or more, and product abrasion amount is by 0.15cm3/ MJ is reduced to
0.11cm3/MJ.Meanwhile stable friction factor is maintained between 0.3~0.4.Showing that prepared brake(-holder) block has to stablize is suitable for
Friction factor, intensity is high, and wearability is good.
Embodiment 2,
The main composition for the friction material that the present embodiment uses is as follows:
Copper powder 68%；Iron powder 3%；High carbon ferro-chrome 4%；Cu-cladding Al Rod 10%；Ormolu powder 15%.
High-performance wind-power high speed shaft brake(-holder) block is prepared as steps described below:
(1) mixing: the powder raw material proportionally weighing of above-mentioned friction material, it is put into three-dimensional material mixer, is added into
0.45% zinc stearate and the kerosene (with the ratio in friction material powder raw material) of 5ml/kg, mixing 4 hours.
(2) friction block is suppressed: mixed material being put into mold according to weight is calculated, is pressed into friction block green body；
(3) brake(-holder) block is sintered: pressure sintering, and atmosphere is hydrogen, and pressure 1.0MPa, sintering temperature is 880 DEG C, and heat preservation is protected
3h furnace cooling is pressed, friction block is obtained；
(4) melt infiltration processing: the above-mentioned brake(-holder) block friction block surface being prepared be put into suppress melt seep material (copper and tin
Alloyed powder: 95%, iron powder: 5%), high-temperature process is carried out in the reducing atmosphere (hydrogen), and sintering temperature is 850 DEG C, and the time is
1h, the wind-powered electricity generation high speed shaft brake(-holder) block of performance required for being obtained after cooling.
Brake(-holder) block prepared by the present embodiment extracts the square sample block of 3 pieces of 20mm × 15mm, in MM3000 friction-test instrument
Friction test is carried out, the shear strength of material is 14MPa, and compressive strength is 160MPa or more, product abrasion amount 0.06cm3/MJ。
Meanwhile stable friction factor is maintained between 0.25-0.35.Show that prepared brake(-holder) block abrasion loss is small, stable friction factor,
Suitable for offshore wind farm unit.
The specific heat capacity of brake(-holder) block friction material of the present invention is big, and good heat conductivity absorbs identical energy, friction material surface
Temperature can reduce by 50 ° or so, therefore high temperature resistant when having the advantages that military service, functional reliability is high, the materials'use service life
It is long, reduce maintenance frequency, significantly improves the generating efficiency of blower.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Anyone skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its
Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (9)
1. a kind of wind-powered electricity generation high speed shaft brake(-holder) block friction material, is made of the raw material of following mass percentage composition:
Copper powder 50~80%；
Iron powder 1~6%；
High carbon ferro-chrome 3~10%；
Cu-cladding Al Rod 8~20%；
Copper alloy powder 8~20%.
2. a kind of preparation method of wind-powered electricity generation high speed shaft brake(-holder) block, includes the following steps:
1) raw material of friction material described in claim 1 is mixed with lubricant and binder, it is then repressed to be rubbed
Block green body；
2) the friction block green body is placed on steel backing plate, carries out pressure sintering and obtains friction block；
The copper coating of the steel backing plate；
3) friction block is carried out melting infiltration processing to get the wind-powered electricity generation high speed shaft brake(-holder) block is arrived.
3. preparation method according to claim 2, it is characterised in that: in step 1), the lubricant be zinc stearate or
Micro mist wax；
The binder is kerosene or atoleine.
4. preparation method according to claim 2 or 3, it is characterised in that: in step 1), the mixed time is 2~8
Hour.
5. the preparation method according to any one of claim 2-4, it is characterised in that: in step 2), on the steel backing plate
Equipped with several grooves, the groove is matched with the protrusion of the friction block green body.
6. the preparation method according to any one of claim 2-5, it is characterised in that: in step 2), the pressure sintering
Condition it is as follows:
Atmosphere is reducing atmosphere；
Pressure is 0.5~2.5MPa；
Temperature is 900~990 DEG C；
The heat-insulation pressure keeping time is 2.5~3.5h.
7. the preparation method according to any one of claim 2-6, it is characterised in that: described to melt infiltration processing in step 3)
The mass percentage composition for melting infiltration material used is as follows:
Copper-tin alloy powder 90~95%；
Iron powder 5~10%.
8. the preparation method according to any one of claim 2-7, it is characterised in that: described to melt infiltration processing in step 3)
Condition it is as follows:
Sintering temperature is 850 DEG C~950 DEG C；
Sintering time is 0.5~2h.
9. the wind-powered electricity generation high speed shaft brake(-holder) block of any one of claim 2-8 the method preparation.
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| CN201910237763.0A CN109807321B (en) | 2019-03-27 | 2019-03-27 | High-performance wind power high-speed shaft brake pad and preparation method thereof |
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| CN201910237763.0A CN109807321B (en) | 2019-03-27 | 2019-03-27 | High-performance wind power high-speed shaft brake pad and preparation method thereof |
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| CN109807321B CN109807321B (en) | 2021-04-13 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110643848A (en) * | 2019-10-14 | 2020-01-03 | 武汉万邦激光金刚石工具股份有限公司 | Brake pad material and preparation method and application thereof |
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