CN101660581B - Metallic matrix spindle brake pad for wind driven generator and preparation method thereof - Google Patents
Metallic matrix spindle brake pad for wind driven generator and preparation method thereof Download PDFInfo
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- CN101660581B CN101660581B CN200910308206XA CN200910308206A CN101660581B CN 101660581 B CN101660581 B CN 101660581B CN 200910308206X A CN200910308206X A CN 200910308206XA CN 200910308206 A CN200910308206 A CN 200910308206A CN 101660581 B CN101660581 B CN 101660581B
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Abstract
The invention relates to a metallic matrix spindle brake pad for a wind driven generator and a preparation method thereof. The material comprises iron powder, copper powder, tin powder, sulphur, short cut steel fiber, copper fiber, high alumina ceramic fiber, inorganic oxide, graphite, etc. The preparation method comprises: weighing the components of the material according to the formulation, stirring and mixing the components in a special dry-type mixer, and ensuring the fibers to be fully dispersed and even; pressing the mixture for molding at the normal temperature, then sintering at the certain pressure and temperature, and cooling along with a furnace; finally, machining to obtain the metallic matrix spindle brake pad. Compared with the common powder metallurgy brake pad, the friction material prepared by the method is added with metals and the ceramic fiber, so as to remarkably improve the mechanical properties of the material and the static friction torque; meanwhile, the product has the advantages of moderate and stable coefficient of dynamic friction, better wear resistance, low brake noise and less dual wear, can completely meet the requirement of the wind driven generator for high speed brake of a spindle, and realizes environmental protection in deed.
Description
Technical field
The present invention relates to a kind of brake block, particularly relate to a kind of brake block that is used for the wind driven generator principal shaft braking system, the invention still further relates to the preparation method of this brake block.
Background technique
Along with the progress and the rapid development of economy of science and technology, human demand to electric power constantly enlarges.Utilize non-renewable energy resources generatings such as coal, oil, all face the poor day by day awkward situation of resource, and do not meet the strategic decision of national sustainable development.Wind energy is as green clean energy resource, and it not only meets the national energy reform orientation, and is again renewable resources, and environmental protection is also had positive meaning.Advance to be subjected in decades the particularly favor of developed countries such as America and Europe, Japan of countries in the world.
During wind energy power, when running into emergency situations or overhauling, main shaft need be braked it is stopped operating.General every typhoon machine is installed 5 axle brakes.Their actings in conjunction are in a brake disc.Brake is opened and water brake by spring force.Two brake blocks are arranged on every axle brake.During brake, brake block is under the pressure effect of piston, and symmetry branch two-stage compresses brake disc up and down.The brake weight of one-level brake is that nominal torque is slowed down main shaft, and when main shaft stall (or slowly rotating), the brake weight of secondary brake is that the nominal torque of twice is pinned main shaft, reliably checks brake disc, and axle is stopped operating.
Advantages such as the powder metallurgy friction plate has that friction factor is higher, good braking effect, heat resistance are good, long service life are particularly suitable for using under the environment of heavy duty, high temperature.Therefore, spindle brake pad generally adopts copper based powder metallurgy friction material at present.
Summary of the invention
First technical problem to be solved by this invention provides the metallic matrix spindle brake pad for wind driven generator of a kind of low cost, safety and the more high and low noise of reliability.
Second technical problem to be solved by this invention provides the preparation method of this metallic matrix spindle brake pad for wind driven generator.
In order to solve above-mentioned first technical problem, metallic matrix spindle brake pad for wind driven generator provided by the invention, its material prescription count by weight percentage into:
Copper powder and glass putty 40～60%, its granularity are≤70 μ m, copper powder purity 〉=98%, wherein copper powder: glass putty=10: 1;
Iron powder 20～40%, its granularity are≤70 μ m, iron powder purity 〉=98.5%;
Weak point is cut Steel Fibre 5～10%, and its length is 2～5mm, and diameter is 50～150 μ m;
Brass fiber 4～10%, its length are 2.5～3.5mm, and diameter is 100～200 μ m;
High alumina ceramic fiber 1～5%, its length are 0.5～1.5mm, and diameter is 50～100 μ m;
Granular graphite 4～10%, fixed carbon content 〉=95%, ash content≤10%, its granularity is≤200 μ m.
Prepare the method for metallic matrix spindle brake pad for wind driven generator, comprise the steps:
(1), batching: by proportioning weighing copper powder, glass putty, iron powder, short Steel Fibre, brass fiber, high alumina ceramic fiber, sulphur, aluminium oxide, silica, crystalline flake graphite and the granular graphite material cut;
(2), batch mixing: will mix mixing time 6～10 hours in load weighted each material input dry type batch mixer;
(3), moulding: take by weighing mixture by the brake block model, pour in the mould, cold moudling under the room temperature, pressing pressure 200～400Mpa;
(4), sintering: the cold base of brake block is placed on the steel backing of copper facing or nickel, put by stacked, separate with the high-strength graphite backing plate between sheet and the sheet, carry out sintering in bell-jar type pressure sintering stove the inside, adopt restitutive protection's atmosphere, sintering pressure 1～2Mpa, 800～1000 ℃ of sintering temperatures during sintering, sintering time 3～8 hours cools off with stove then;
(5), the more above-mentioned product that makes is carried out plain grinding, chamfering, fluting by technical requirements, through spraying paint, print mark, promptly make product again.
Adopt metallic matrix spindle brake pad for wind driven generator of technique scheme and preparation method thereof, spindle brake pad of the present invention is compared with the metallurgical brake block of ordinary powder, mix enhancing by adding different metal fiber and ceramic fiber, when improving mechanical properties of materials, reduce the wear rate of material, and improve its friction stability.In addition, by in material, adding granular artificial graphite, except playing stable friction factor, can also significantly reduce the brake noise in the friction disc brake process, the real environment friendly of realizing, product has the moderate and stable coefficient of kinetic friction simultaneously, better wear resistance, low brake noise and to the less advantage of antithesis wearing and tearing, static friction coefficient can reach about 0.5, mean coefficient of kinetic sliding friction is about 0.3, braking process is steady, the brakeless noise is a kind of cost performance higher friction material product, can fully satisfy the requirement that wind driven generator principal shaft is braked at a high speed.
Description of drawings
Fig. 1 is the braking curve of blower fan main shaft brake block experiment 1;
Fig. 2 is the braking curve of blower fan main shaft brake block experiment 2;
Fig. 3 is the braking curve of blower fan main shaft brake block experiment 3;
Fig. 4 is the braking curve of blower fan main shaft brake block experiment 4;
Fig. 5 is the braking curve of blower fan main shaft brake block experiment 5;
Fig. 6 is the braking curve of blower fan main shaft brake block experiment 6;
Fig. 7 is the braking curve of blower fan main shaft brake block experiment 7;
Fig. 8 is the braking curve of blower fan main shaft brake block experiment 8;
Fig. 9 is the braking curve of blower fan main shaft brake block experiment 9;
Figure 10 is the braking curve of blower fan main shaft brake block experiment 10.
Embodiment
The invention will be further described below in conjunction with embodiment.
Embodiment 1:
The dispensing information of wind driven generator principal shaft brake block provided by the invention
Copper powder 50 (wt.%), its granularity are≤70 μ m, copper powder purity 〉=98%,
Glass putty 5 (wt.%), its granularity are≤70 μ m,
Iron powder 20 (wt.%), its granularity are≤70 μ m, iron powder purity 〉=98.5%;
Weak point is cut Steel Fibre 5 (wt.%), and its length is 2～5mm, and diameter is 50～150 μ m;
Brass fiber 5 (wt.%), its length are 2.5～3.5mm, and diameter is 100～200 μ m;
High alumina ceramic fiber 3 (wt.%), its length are 0.5～1.5mm, and diameter is 50～100 μ m;
Sulphur 1 (wt.%), its granularity are≤200 μ m;
Aluminium oxide 2 (wt.%), its granularity are 70 μ m～200 μ m;
Silica 3 (wt.%), its granularity are 70 μ m～200 μ m;
Crystalline flake graphite 2 (wt.%), fixed carbon content 〉=90%, ash content≤10%, its granularity is≤70 μ m;
Granular graphite 4 (wt.%), fixed carbon content 〉=95%, ash content≤10%, its granularity is≤200 μ m.
In this formula system, it is matrix that friction material adopts copper, iron, and aluminium oxide, silica are for increasing the agent that rubs, and glass putty, crystalline flake graphite are as lubricant component, and sulphur adds Steel Fibre, copper fiber and ceramic fiber as reinforcing phase as strengthening constituent element.
Preparation process's explanation of wind driven generator principal shaft brake block
(1), batching: by each component materials of said ratio weighing;
(2), batch mixing: will mix mixing time 8 hours in load weighted each material input dry type batch mixer;
(3), moulding: take by weighing mixture by the brake block model, pour in the mould, cold moudling under the room temperature, pressurize promptly got cold base in 3 seconds under the pressing pressure of 300Mpa;
(4), sintering: the cold base of brake block is placed on the copper-plated steel backing, put by stacked, separate with the high-strength graphite backing plate between sheet and the sheet, carry out sintering in bell-jar type pressure sintering stove the inside, adopt the reductive hydrogen protection during sintering, sintering pressure 2Mpa, 900 ℃ of sintering temperatures, sintering time 3 hours cools off with stove then;
(5), the more above-mentioned product that makes is carried out deburring, plain grinding, chamfering, fluting by technical requirements, through spraying, seal mark, promptly making becomes product of the present invention again.
Embodiment 2:
The dispensing information of wind driven generator principal shaft brake block provided by the invention
Copper powder and glass putty 50%, its granularity are≤70 μ m, copper powder purity 〉=98%, wherein copper powder: glass putty=10: 1;
Iron powder 20 (wt.%), its granularity are≤70 μ m, iron powder purity 〉=98.5%;
Weak point is cut Steel Fibre 5 (wt.%), and its length is 2～5mm, and diameter is 50～150 μ m;
Brass fiber 4 (wt.%), its length are 2.5～3.5mm, and diameter is 100～200 μ m;
High alumina ceramic fiber 4 (wt.%), its length are 0.5～1.5mm, and diameter is 50～100 μ m;
Aluminium oxide 5 (wt.%), its granularity are 70 μ m～200 μ m;
Silica 5 (wt.%), its granularity are 70 μ m～200 μ m;
Crystalline flake graphite 3 (wt.%), fixed carbon content 〉=90%, ash content≤10%, its granularity is≤70 μ m;
Granular graphite 4 (wt.%), fixed carbon content 〉=95%, ash content≤10%, its granularity is≤200 μ m.
In this formula system, it is matrix that friction material adopts copper, iron, and aluminium oxide, silica are for increasing the agent that rubs, and glass putty, crystalline flake graphite add Steel Fibre, copper fiber and ceramic fiber as reinforcing phase as lubricant component.
Preparation process's explanation of wind driven generator principal shaft brake block
(1), batching: by each component materials of said ratio weighing;
(2), batch mixing: will mix mixing time 8 hours in load weighted each material input dry type batch mixer;
(3), moulding: take by weighing mixture by the brake block model, pour in the mould, cold moudling under the room temperature, pressurize promptly got cold base in 3 seconds under the pressing pressure of 400Mp a;
(4), sintering: the cold base of brake block is placed on the steel backing of nickel plating, put by stacked, separate with the high-strength graphite backing plate between sheet and the sheet, carry out sintering in bell-jar type pressure sintering stove the inside, adopt the reductive hydrogen protection during sintering, sintering pressure 1Mp a, 900 ℃ of sintering temperatures, sintering time 5 hours cools off with stove then;
(5), the more above-mentioned product that makes is carried out deburring, plain grinding, chamfering, fluting by technical requirements, through spraying, seal mark, promptly making becomes product of the present invention again.
Embodiment 3:
The dispensing information of wind driven generator principal shaft brake block provided by the invention
Copper powder and glass putty 40wt.%, its granularity is≤70 μ m, copper powder purity 〉=98%, wherein copper powder: glass putty=10: 1;
Iron powder 20 (wt.%), its granularity are≤70 μ m, iron powder purity 〉=98.5%;
Weak point is cut Steel Fibre 10 (wt.%), and its length is 2～5mm, and diameter is 50～150 μ m;
Brass fiber 10 (wt.%), its length are 2.5～3.5mm, and diameter is 100～200 μ m;
High alumina ceramic fiber 3 (wt.%), its length are 0.5～1.5mm, and diameter is 50～100 μ m;
Aluminium oxide 2 (wt.%), its granularity are 70 μ m～200 μ m;
Silica 3 (wt.%), its granularity are 70 μ m～200 μ m;
Crystalline flake graphite 8 (wt.%), fixed carbon content 〉=90%, ash content≤10%, its granularity is≤70 μ m;
Granular graphite 4 (wt.%), fixed carbon content 〉=95%, ash content≤10%, its granularity is≤200 μ m.
In this formula system, it is matrix that friction material adopts copper, iron, and aluminium oxide, silica are for increasing the agent that rubs, and glass putty, crystalline flake graphite add Steel Fibre, copper fiber and ceramic fiber as reinforcing phase as lubricant component.
Preparation process's explanation of wind driven generator principal shaft brake block
(1), batching: by each component materials of said ratio weighing;
(2), batch mixing: will mix mixing time 8 hours in load weighted each material input dry type batch mixer;
(3), moulding: take by weighing mixture by the brake block model, pour in the mould, cold moudling under the room temperature, pressurize promptly got cold base in 5 seconds under the pressing pressure of 200Mpa;
(4), sintering: the cold base of brake block is placed on the copper-plated steel backing, put by stacked, separate with the high-strength graphite backing plate between sheet and the sheet, carry out sintering in bell-jar type pressure sintering stove the inside, adopt the reductive hydrogen protection during sintering, sintering pressure 2Mpa, 800 ℃ of sintering temperatures, sintering time 8 hours cools off with stove then;
(5), the more above-mentioned product that makes is carried out deburring, plain grinding, chamfering, fluting by technical requirements, through spraying, seal mark, promptly making becomes product of the present invention again.
Embodiment 4:
The dispensing information of wind driven generator principal shaft brake block provided by the invention
Copper powder and glass putty 40wt.%, its granularity is≤70 μ m, copper powder purity 〉=98%, wherein copper powder: glass putty=10: 1;
Iron powder 35 (wt.%), its granularity are≤70 μ m, iron powder purity 〉=98.5%;
Weak point is cut Steel Fibre 5 (wt.%), and its length is 2～5mm, and diameter is 50～150 μ m;
Brass fiber 4 (wt.%), its length are 2.5～3.5mm, and diameter is 100～200 μ m;
High alumina ceramic fiber 3 (wt.%), its length are 0.5～1.5mm, and diameter is 50～100 μ m;
Sulphur 1 (wt.%), its granularity are≤200 μ m;
Aluminium oxide 2 (wt.%), its granularity are 70 μ m～200 μ m;
Silica 2 (wt.%), its granularity are 70 μ m～200 μ m;
Crystalline flake graphite 3 (wt.%), fixed carbon content 〉=90%, ash content≤10%, its granularity is≤70 μ m;
Granular graphite 5 (wt.%), fixed carbon content 95%, ash content≤10%, its granularity is≤200 μ m.
In this formula system, it is matrix that friction material adopts copper, iron, and aluminium oxide, silica are for increasing the agent that rubs, and glass putty, crystalline flake graphite are as lubricant component, and sulphur adds Steel Fibre, copper fiber and ceramic fiber as reinforcing phase as strengthening constituent element.
Preparation process's explanation of wind driven generator principal shaft brake block
(1), batching: by each component materials of said ratio weighing;
(2), batch mixing: will mix mixing time 8 hours in load weighted each material input dry type batch mixer;
(3), moulding: take by weighing mixture by the brake block model, pour in the mould, cold moudling under the room temperature, pressurize promptly got cold base in 3 seconds under the pressing pressure of 300Mpa;
(4), sintering: the cold base of brake block is placed on the steel backing of nickel plating, put by stacked, separate with the high-strength graphite backing plate between sheet and the sheet, carry out sintering in bell-jar type pressure sintering stove the inside, adopt the reductive hydrogen protection during sintering, sintering pressure 2Mpa, 1000 ℃ of sintering temperatures, sintering time 3 hours cools off with stove then;
(5), the more above-mentioned product that makes is carried out deburring, plain grinding, chamfering, fluting by technical requirements, through spraying, seal mark, promptly making becomes product of the present invention again.
Embodiment 5:
The dispensing information of wind driven generator principal shaft brake block provided by the invention
Copper powder and glass putty 40wt.%, its granularity is≤70 μ m, copper powder purity 〉=98%, wherein copper powder: glass putty=10: 1;
Iron powder 35 (wt.%), its granularity are≤70 μ m, iron powder purity 〉=98.5%;
Weak point is cut Steel Fibre 5 (wt.%), and its length is 2～5mm, and diameter is 50～150 μ m;
Brass fiber 6 (wt.%), its length are 2.5～3.5mm, and diameter is 100～200 μ m;
High alumina ceramic fiber 1 (wt.%), its length are 0.5～1.5mm, and diameter is 50～100 μ m;
Sulphur 1 (wt.%), its granularity are≤200 μ m;
Aluminium oxide 2 (wt.%), its granularity are 70 μ m～200 μ m;
Silica 2 (wt.%), its granularity are 70 μ m～200 μ m;
Crystalline flake graphite 3 (wt.%), fixed carbon content 〉=90%, ash content≤10%, its granularity is≤70 μ m;
Granular graphite 5 (wt.%), fixed carbon content 95%, ash content≤10%, its granularity is≤200 μ m.
In this formula system, it is matrix that friction material adopts copper, iron, and aluminium oxide, silica are for increasing the agent that rubs, and glass putty, crystalline flake graphite are as lubricant component, and sulphur adds Steel Fibre, copper fiber and ceramic fiber as reinforcing phase as strengthening constituent element.
Preparation process's explanation of wind driven generator principal shaft brake block
(1), batching: by each component materials of said ratio weighing;
(2), batch mixing: will mix mixing time 8 hours in load weighted each material input dry type batch mixer;
(3), moulding: take by weighing mixture by the brake block model, pour in the mould, cold moudling under the room temperature, pressurize promptly got cold base in 3 seconds under the pressing pressure of 300Mpa;
(4), sintering: the cold base of brake block is placed on the steel backing of nickel plating, put by stacked, separate with the high-strength graphite backing plate between sheet and the sheet, carry out sintering in bell-jar type pressure sintering stove the inside, adopt the reductive hydrogen protection during sintering, sintering pressure 2Mpa, 1000 ℃ of sintering temperatures, sintering time 3 hours cools off with stove then;
(5), the more above-mentioned product that makes is carried out deburring, plain grinding, chamfering, fluting by technical requirements, through spraying, seal mark, promptly making becomes product of the present invention again.
Embodiment 6:
The dispensing information of wind driven generator principal shaft brake block provided by the invention
Copper powder and glass putty 40wt.%, its granularity is≤70 μ m, copper powder purity 〉=98%, wherein copper powder: glass putty=10: 1;
Iron powder 33 (wt.%), its granularity are≤70 μ m, iron powder purity 〉=98.5%;
Weak point is cut Steel Fibre 5 (wt.%), and its length is 2～5mm, and diameter is 50～150 μ m;
Brass fiber 4 (wt.%), its length are 2.5～3.5mm, and diameter is 100～200 μ m;
High alumina ceramic fiber 5 (wt.%), its length are 0.5～1.5mm, and diameter is 50～100 μ m;
Sulphur 1 (wt.%), its granularity are≤200 μ m;
Aluminium oxide 2 (wt.%), its granularity are 70 μ m～200 μ m;
Silica 2 (wt.%), its granularity are 70 μ m～200 μ m;
Crystalline flake graphite 3 (wt.%), fixed carbon content 〉=90%, ash content≤10%, its granularity is≤70 μ m;
Granular graphite 5 (wt.%), fixed carbon content 〉=95%, ash content≤10%, its granularity is≤200 μ m.
In this formula system, it is matrix that friction material adopts copper, iron, and aluminium oxide, silica are for increasing the agent that rubs, and glass putty, crystalline flake graphite are as lubricant component, and sulphur adds Steel Fibre, copper fiber and ceramic fiber as reinforcing phase as strengthening constituent element.
Preparation process's explanation of wind driven generator principal shaft brake block
(1), batching: by each component materials of said ratio weighing;
(2), batch mixing: will mix mixing time 8 hours in load weighted each material input dry type batch mixer;
(3), moulding: take by weighing mixture by the brake block model, pour in the mould, cold moudling under the room temperature, pressurize promptly got cold base in 3 seconds under the pressing pressure of 300Mpa;
(4), sintering: the cold base of brake block is placed on the steel backing of nickel plating, put by stacked, separate with the high-strength graphite backing plate between sheet and the sheet, carry out sintering in bell-jar type pressure sintering stove the inside, adopt the reductive hydrogen protection during sintering, sintering pressure 2Mpa, 1000 ℃ of sintering temperatures, sintering time 3 hours cools off with stove then;
(5), the more above-mentioned product that makes is carried out deburring, plain grinding, chamfering, fluting by technical requirements, through spraying, seal mark, promptly making becomes product of the present invention again.
The performance of wind driven generator principal shaft brake block
Carry out frictional wear experiment on the MM-1000 friction material test machine, choose pressure and be respectively 1MPa, 3MPa, 1MPa brakes 7 times down, and 3MPa brakes 3 times down, brakes altogether 10 times.Mean coefficient of kinetic sliding friction is 0.26, and static friction coefficient is 0.5; Fret wear is m/ faces of 1.7 μ, and antithesis (45# steel) wearing and tearing are m/ face of 0.26 μ, and braking process is steady, the brakeless noise.Braking curve such as Fig. 1-shown in Figure 10.
Claims (2)
1. metallic matrix spindle brake pad for wind driven generator is characterized in that: its material prescription count by weight percentage into:
Copper powder and glass putty 40～60%, its granularity are≤70 μ m, copper powder purity 〉=98%, wherein copper powder: glass putty=10: 1;
Iron powder 20～40%, its granularity are≤70 μ m, iron powder purity 〉=98.5%;
Weak point is cut Steel Fibre 5～10%, and its length is 2～5mm, and diameter is 50～150 μ m;
Brass fiber 4～10%, its length are 2.5～3.5mm, and diameter is 100～200 μ m;
High alumina ceramic fiber 1～5%, its length are 0.5～1.5mm, and diameter is 50～100 μ m;
Sulphur 0～5%, its granularity are≤200 μ m;
Aluminium oxide 2～5%, its granularity are 70 μ m～200 μ m;
Silica 2～5%, its granularity are 70 μ m～200 μ m;
Crystalline flake graphite 2～8%, fixed carbon content 〉=90%, ash content≤10%, its granularity is≤70 μ m;
Granular graphite 4～10%, fixed carbon content 〉=95%, ash content≤10%, its granularity is≤200 μ m.
2. prepare the method for the described metallic matrix spindle brake pad for wind driven generator of claim 1, it is characterized in that: comprise the steps:
(1), batching: by proportioning weighing copper powder, glass putty, iron powder, short Steel Fibre, brass fiber, high alumina ceramic fiber, sulphur, aluminium oxide, silica, crystalline flake graphite and the granular graphite material cut;
(2), batch mixing: will mix mixing time 6～10 hours in load weighted each material input dry type batch mixer;
(3), moulding: take by weighing mixture by the brake block model, pour in the mould, cold moudling under the room temperature, pressing pressure 200～400Mpa;
(4), sintering: the cold base of brake block is placed on the steel backing of copper facing or nickel, put by stacked, separate with the high-strength graphite backing plate between sheet and the sheet, carry out sintering in bell-jar type pressure sintering stove the inside, adopt restitutive protection's atmosphere, sintering pressure 1～2Mpa, 800～1000 ℃ of sintering temperatures during sintering, sintering time 3～8 hours cools off with stove then;
(5), the more above-mentioned product that makes is carried out plain grinding, chamfering, fluting by technical requirements, through spraying paint, print mark, promptly make product again.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN200910308206XA CN101660581B (en) | 2009-10-12 | 2009-10-12 | Metallic matrix spindle brake pad for wind driven generator and preparation method thereof |
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| CN200910308206XA CN101660581B (en) | 2009-10-12 | 2009-10-12 | Metallic matrix spindle brake pad for wind driven generator and preparation method thereof |
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| CN101660581B true CN101660581B (en) | 2011-04-06 |
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| 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 |
| CN104259466A (en) * | 2014-10-20 | 2015-01-07 | 北京科技大学 | Method for connecting copper-based power metallurgy composite materials and steel |
| CN105422702B (en) * | 2015-12-22 | 2018-06-22 | 江西华伍制动器股份有限公司 | Wind driven generator principal shaft brake rim and preparation method thereof |
| CN106119668A (en) * | 2016-08-15 | 2016-11-16 | 合肥万向钱潮汽车零部件有限公司 | A kind of material prescription of automobile brake drum |
| CN106402218B (en) * | 2016-11-16 | 2019-07-26 | 威海蓝科复合材料科技有限公司 | The preparation method of polyacrylonitrile-radical short carbon fiber brake block |
| CN110259859A (en) * | 2019-06-03 | 2019-09-20 | 山西中聚晶科半导体有限公司 | A kind of brake block and preparation method thereof using sapphire preparation |
| CN112377548B (en) * | 2020-11-16 | 2022-06-10 | 武汉理工大学 | Wear-resistant noise-reducing metal-based high-speed rail brake pad and preparation method thereof |
| CN113004867B (en) * | 2021-02-23 | 2022-03-04 | 山东金麒麟股份有限公司 | Environment-friendly friction material, high-speed rail brake pad and preparation method |
| CN113275554B (en) * | 2021-03-31 | 2022-10-25 | 西安铁路信号有限责任公司 | Copper-based powder metallurgy clutch friction plate for point switch and manufacturing method thereof |
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| US2877198A (en) * | 1956-07-30 | 1959-03-10 | Goodrich Co B F | Molding composition comprising fused aluminum silicate in fiber and pellet form and process of making same |
| CN1317530A (en) * | 2001-04-20 | 2001-10-17 | 清华大学 | Cermet friction material containing steel fibres and its preparing process |
| CN101382175A (en) * | 2008-10-15 | 2009-03-11 | 贵州新安航空机械有限责任公司 | Shaft brake flat |
-
2009
- 2009-10-12 CN CN200910308206XA patent/CN101660581B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2877198A (en) * | 1956-07-30 | 1959-03-10 | Goodrich Co B F | Molding composition comprising fused aluminum silicate in fiber and pellet form and process of making same |
| CN1317530A (en) * | 2001-04-20 | 2001-10-17 | 清华大学 | Cermet friction material containing steel fibres and its preparing process |
| CN101382175A (en) * | 2008-10-15 | 2009-03-11 | 贵州新安航空机械有限责任公司 | Shaft brake flat |
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| CN101660581A (en) | 2010-03-03 |
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