CN112081848A - Friction lining for wind power coupler and preparation method thereof - Google Patents
Friction lining for wind power coupler and preparation method thereof Download PDFInfo
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- CN112081848A CN112081848A CN202011012840.1A CN202011012840A CN112081848A CN 112081848 A CN112081848 A CN 112081848A CN 202011012840 A CN202011012840 A CN 202011012840A CN 112081848 A CN112081848 A CN 112081848A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D69/00—Friction linings; Attachment thereof; Selection of coacting friction substances or surfaces
- F16D69/02—Compositions of linings; Methods of manufacturing
- F16D69/027—Compositions based on metals or inorganic oxides
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/02—Compacting only
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/10—Sintering only
- B22F3/1017—Multiple heating or additional steps
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C9/00—Alloys based on copper
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C9/00—Alloys based on copper
- C22C9/06—Alloys based on copper with nickel or cobalt as the next major constituent
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D69/00—Friction linings; Attachment thereof; Selection of coacting friction substances or surfaces
- F16D69/02—Compositions of linings; Methods of manufacturing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2200/00—Materials; Production methods therefor
- F16D2200/0004—Materials; Production methods therefor metallic
- F16D2200/0026—Non-ferro
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2200/00—Materials; Production methods therefor
- F16D2200/006—Materials; Production methods therefor containing fibres or particles
- F16D2200/0073—Materials; Production methods therefor containing fibres or particles having lubricating properties
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2200/00—Materials; Production methods therefor
- F16D2200/0082—Production methods therefor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2250/00—Manufacturing; Assembly
- F16D2250/0023—Shaping by pressure
Abstract
The invention belongs to the technical field of friction plates, and particularly relates to a friction lining for a wind power coupling and a preparation method thereof. The friction lining comprises the following components in parts by weight: 60 to 70 parts of electrolytic copper powder, 8 to 18 parts of adhesive, 7 to 20 parts of wear-resistant agent, and 10 to 34 parts of friction reducer; the friction lining produced by the preparation method has the characteristics of high structural strength, good mechanical property, high material toughness, low braking noise, wear resistance and long service life.
Description
Technical Field
The invention belongs to the technical field of friction plates, and particularly relates to a friction lining for a wind power coupling and a preparation method thereof.
Background
The wind power coupler is used for connecting a high-speed shaft of a gearbox and a main shaft of a generator, is suitable for adjusting the torsional vibration characteristic of a shafting of a transmission device under the conditions of high speed and heavy load, compensates the axial, radial and angular displacement of a driving shaft and a driven shaft caused by vibration and impact, absorbs extra energy generated by the fluctuation of an external load of the shafting, and continuously transmits torque and motion. Meanwhile, the coupling has a torque limiting function, when the short circuit or overload occurs to the unit, the torque on the coupling exceeds the set torque, the torque limiter can slide, and the coupling is automatically recovered after the overload situation disappears, so that the mechanical damage and the expensive shutdown loss are effectively prevented.
The friction plate plays a key part in the torque limiter for friction braking, the maintenance is not required under the condition of long-term continuous operation in consideration of the working condition and maintenance difficulty of a fan, and the braking process of the torque limiter of the wind driven generator belongs to high-pressure and low-linear-velocity braking, so that the friction performance, mechanical strength and particularly braking noise of a braking material are high. The existing coupling friction plates for wind power have the adverse phenomena of low structural strength, high braking noise, abrasion resistance of friction linings and the like, so that no friction plate which can meet the standard requirements exists.
Disclosure of Invention
The invention aims to provide a novel processing method and a processing device which have the advantages of high structural strength, good mechanical property, high material toughness, low braking noise, wear resistance and long service life.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a friction lining for a wind power coupling, characterized in that: the paint comprises the following components in parts by weight: 60 to 70 parts of electrolytic copper powder, 8 to 18 parts of adhesive, 7 to 20 parts of wear-resistant agent, and 10 to 34 parts of friction reducer; wherein the adhesive comprises 4 to 8 parts of tin powder, 2 to 5 parts of nickel powder and 2 to 5 parts of cobalt powder.
The additional technical features constituting the friction lining for the wind power coupling as described above further include:
-the anti-attrition agent comprises 2 to 10 parts of alumina, 5 to 10 parts of reduced iron powder;
-the friction reducer comprises 1 to 6 parts of molybdenum disulphide, 9 to 28 parts of graphite;
-the graphite comprises 5 to 13 parts of flake graphite, 4 to 15 parts of particulate graphite.
The invention also provides a preparation method for manufacturing the friction lining of the wind power coupler, which is characterized by comprising the following steps of: the method comprises the following steps:
step one, weighing various components of the friction lining according to the weight part ratio: the electrolytic copper powder comprises 60 to 70 parts of electrolytic copper powder, 4 to 8 parts of tin powder, 2 to 5 parts of nickel powder, 2 to 5 parts of cobalt powder, 2 to 10 parts of alumina, 5 to 10 parts of reduced iron powder, 1 to 6 parts of molybdenum disulfide, 5 to 13 parts of flake graphite and 4 to 15 parts of granular graphite;
step two, putting the components weighed in the step one into a V-shaped mixer, and stirring for 3 to 4 hours to uniformly mix the components;
step three, cold press molding, namely adding the raw materials mixed in the step three into a die cavity of a hydraulic press, pressurizing to 15-20 MPa, and demolding after molding to obtain a blank;
and step four, sintering and curing, namely placing the blank prepared in the step four into a sintering furnace, and sintering and curing the blank in a sectional pressurizing and heating manner.
Additional technical features constituting the above-described method for manufacturing a friction lining further include:
the sectional pressurizing and heating mode is that,
firstly, under the condition of normal pressure, within 90-100 minutes, the temperature in the furnace is raised from room temperature to 400 ℃, and the temperature is kept for 50-60 minutes;
secondly, under the condition of normal pressure, within 60-90 minutes, the temperature in the furnace is increased from 400 ℃ to 650-750 ℃;
thirdly, the pressure in the furnace is between 2 and 2.5MPa, and the temperature in the furnace is increased from 650-750 ℃ to 900-950 ℃ within 150 minutes;
The invention also provides a brake piece for the wind power coupler, which is characterized in that: comprises a copper-plated substrate and a friction lining arranged on the copper-plated substrate; wherein the friction lining is the friction lining, and the thickness of the copper plating layer of the copper-plated substrate is not less than 20 μm.
Compared with the prior art, the friction lining for the wind power coupler and the preparation method thereof provided by the invention have the following advantages: firstly, because the raw material components of the friction lining comprise tin powder, nickel powder and cobalt powder which are matched according to the weight portion proportion, and the three components form the adhesive, the friction lining is made of electrolytic copper powder as a base material, tin powder is added to the friction lining, and tin bronze alloy is generated through high-temperature sintering, so that the friction structure strength and the mechanical property are improved, the wear resistance of the friction material is obviously enhanced, meanwhile, the nickel powder has the effect of catalytic reaction on the premise of enhancing the bonding strength of the gasket, and particularly, the cobalt powder has higher activity when being added as a bonding agent during densification and sintering, the diffusion process can be accelerated during hot-pressing sintering, the consumed fracture work is high, the lining can obtain higher strength, other components of the mixture are more uniform, the material toughness of the lining is obviously increased, the wear rate is obviously reduced, and the continuous work of the wind power coupler is free from maintenance; the friction lining contains the friction reducer consisting of molybdenum disulfide, crystalline flake graphite and granular graphite, wherein the molybdenum disulfide has excellent thermal conductivity, thermal stability and seizure resistance, is particularly suitable for the working conditions of high load, high rotating speed, temperature sudden change and compression and abrasion resistant equipment, improves the lubricating property of the friction lining, and meanwhile, the granular artificial graphite can reduce the compactness of the material, increase the porosity and play a role in sound absorption and noise reduction; the preparation method of the friction lining of the wind power coupler manufactures the friction lining through the procedures of weighing, mixing, cold press molding, sintering and curing and the like, has the advantages of clear procedure links, tight connection, simplicity in operation and the like, and particularly adopts a segmented pressurizing and heating mode to perform sintering and curing, so that the friction lining is ensured to have the quality characteristics of high structural strength, good mechanical property, wear resistance and long service life.
Drawings
FIG. 1 is a performance test data chart of a friction lining for a wind power coupling according to the present invention.
Detailed Description
The friction lining for a wind power coupling and the preparation method thereof according to the present invention are further explained with reference to the following embodiments:
implement one
Step one, weighing various components of the friction lining according to the weight part ratio: 60 parts of electrolytic copper powder, 8 parts of tin powder, 5 parts of flake graphite, 5 parts of artificial graphite, 2 parts of aluminum oxide, 2 parts of cobalt powder, 10 parts of reduced iron powder, 2 parts of nickel powder and 6 parts of molybdenum disulfide to obtain a premix;
step two, putting the premix weighed in the step one into a V-shaped mixer, and stirring for 3 hours to uniformly mix the premix and the V-shaped mixer to obtain a finished mixture;
step three, mounting a preset model die on a hydraulic machine, and putting the mixture obtained in the step two into a die cavity for cold press molding to obtain a friction lining blank, wherein the working pressure is set to be 16MPa, and the pressure maintaining time is set to be 2 seconds;
step four, placing the friction lining blank prepared in the step three into a sintering furnace, and sintering and curing the friction lining blank according to the following modes:
under the condition of normal pressure, the temperature in the furnace is increased from room temperature to 400 ℃ within 90 minutes, and the temperature is kept for 60 minutes;
under the condition of normal pressure, the temperature in the furnace is increased from 400 ℃ to 700 ℃ within 90 minutes;
increasing the pressure in the furnace to 2.2MPa, and increasing the temperature in the furnace from 700 ℃ to 950 ℃ within 150 minutes;
increasing the pressure in the furnace to 4.3MPa, increasing the temperature in the furnace from 950 ℃ to 980 ℃ within 30 minutes, and keeping the temperature for 180 minutes;
the pressure in the furnace is kept at 4.3MPa, the temperature in the furnace is reduced to room temperature from 980 ℃, and then the sintering furnace is opened to take out a finished product;
example two
Step one, weighing various components of the friction lining according to the weight part ratio: 60 parts of electrolytic copper powder, 4 parts of tin powder, 5 parts of flake graphite, 6 parts of artificial graphite, 10 parts of aluminum oxide, 5 parts of cobalt powder, 5 parts of reduced iron powder, 4 parts of nickel powder and 1 part of molybdenum disulfide to obtain a premix;
step two, putting the premix weighed in the step one into a V-shaped mixer, and stirring for 4 hours to uniformly mix the premix and the V-shaped mixer to obtain a finished mixture;
step three, mounting a preset model die on a hydraulic machine, and putting the mixture obtained in the step two into a die cavity for cold press molding to obtain a friction lining blank, wherein the working pressure is set to be 18MPa, and the pressure maintaining time is set to be 4 seconds;
step four, placing the friction lining blank prepared in the step three into a sintering furnace, and sintering and curing the friction lining blank according to the following modes:
under the condition of normal pressure, the temperature in the furnace is increased from room temperature to 400 ℃ within 90 minutes, and the temperature is kept for 60 minutes;
under the condition of normal pressure, the temperature in the furnace is increased from 400 ℃ to 650 ℃ within 90 minutes;
increasing the pressure in the furnace to 2.5MPa, and increasing the temperature in the furnace from 650 ℃ to 900 ℃ within 150 minutes;
increasing the pressure in the furnace to 4.7MPa, increasing the temperature in the furnace from 900 ℃ to 960 ℃ within 60 minutes, and keeping the temperature for 180 minutes;
the pressure in the furnace is kept at 4.7MPa, the temperature in the furnace is reduced to the room temperature from 960 ℃, and then the sintering furnace is opened to take out the finished product.
EXAMPLE III
Step one, weighing various components of the friction lining according to the weight part ratio: 70 parts of electrolytic copper powder, 4 parts of tin, 5 parts of flake graphite, 5 parts of artificial graphite, 2 parts of alumina, 5 parts of cobalt powder, 5 parts of reduced iron powder, 2 parts of nickel powder and 2 parts of molybdenum disulfide to obtain a premix;
step two, putting the premix weighed in the step one into a V-shaped mixer, and stirring for 4 hours to uniformly mix the premix and the V-shaped mixer to obtain a finished mixture;
step three, mounting a preset model die on a hydraulic machine, and putting the mixture obtained in the step two into a die cavity for cold press molding to obtain a friction lining blank, wherein the working pressure is set to be 20MPa, and the pressure maintaining time is set to be 3 seconds;
step four, placing the friction lining blank prepared in the step three into a sintering furnace, and sintering and curing the friction lining blank according to the following modes:
under the condition of normal pressure, within 100 minutes, the temperature in the furnace is increased from room temperature to 400 ℃, and the temperature is kept for 50 minutes;
under the condition of normal pressure, the temperature in the furnace is increased from 400 ℃ to 750 ℃ within 60 minutes;
increasing the pressure in the furnace to 2MPa, and increasing the temperature in the furnace from 750 ℃ to 900 ℃ within 150 minutes;
increasing the pressure in the furnace to 4MPa, increasing the temperature in the furnace from 900 ℃ to 950 ℃ within 60 minutes, and keeping the temperature for 180 minutes;
keeping the pressure in the furnace at 4MPa, reducing the temperature in the furnace from 950 ℃ to room temperature, opening the sintering furnace and taking out a finished product;
example four
Step one, weighing various components of the friction lining according to the weight part ratio: 60 parts of electrolytic copper powder, 4 parts of tin powder, 13 parts of flake graphite, 5 parts of artificial graphite, 5 parts of aluminum oxide, 2 parts of cobalt powder, 6 parts of reduced iron powder, 2 parts of nickel powder and 3 parts of molybdenum disulfide to obtain a premix;
step two, putting the premix weighed in the step one into a V-shaped mixer, and stirring for 3.5 hours to uniformly mix the premix and the V-shaped mixer to obtain a finished mixture;
step three, mounting a preset model die on a hydraulic machine, and putting the mixture obtained in the step two into a die cavity for cold press molding to obtain a friction lining blank, wherein the working pressure is set to be 15MPa, and the pressure maintaining time is set to be 3 seconds;
step four, placing the friction lining blank prepared in the step three into a sintering furnace, and sintering and curing the friction lining blank according to the following modes:
under the condition of normal pressure, within 100 minutes, the temperature in the furnace is increased from room temperature to 400 ℃, and the temperature is kept for 50 minutes;
under the condition of normal pressure, the temperature in the furnace is increased from 400 ℃ to 700 ℃ within 60 minutes;
increasing the pressure in the furnace to 2.5MPa, and increasing the temperature in the furnace from 700 ℃ to 900 ℃ within 150 minutes;
increasing the pressure in the furnace to 4.8MPa, increasing the temperature in the furnace from 900 ℃ to 950 ℃ within 60 minutes, and keeping the temperature for 180 minutes;
the pressure in the furnace is kept at 4.8MPa, the temperature in the furnace is reduced to the room temperature from 950 ℃, and then the sintering furnace is opened to take out a finished product;
EXAMPLE five
Step one, weighing various components of the friction lining according to the weight part ratio: 60 parts of electrolytic copper powder, 5 parts of tin powder, 5 parts of flake graphite, 4 parts of artificial graphite, 3 parts of aluminum oxide, 6 parts of cobalt powder, 5 parts of reduced iron powder, 7 parts of nickel powder and 5 parts of molybdenum disulfide to obtain a premix;
step two, putting the premix weighed in the step one into a V-shaped mixer, and stirring for 3.8 hours to uniformly mix the premix and the V-shaped mixer to obtain a finished mixture;
step three, mounting a preset model die on a hydraulic machine, and putting the mixture obtained in the step two into a die cavity for cold press molding to obtain a friction lining blank, wherein the working pressure is set to be 17MPa, and the pressure maintaining time is set to be 5 seconds;
step four, placing the friction lining blank prepared in the step three into a sintering furnace, and sintering and curing the friction lining blank according to the following modes:
under the condition of normal pressure, within 100 minutes, the temperature in the furnace is increased from room temperature to 400 ℃, and the temperature is kept for 50 minutes;
under the condition of normal pressure, the temperature in the furnace is increased from 400 ℃ to 700 ℃ within 60 minutes;
increasing the pressure in the furnace to 2MPa, and increasing the temperature in the furnace from 700 ℃ to 920 ℃ within 150 minutes;
increasing the pressure in the furnace to 4.2MPa, increasing the temperature in the furnace from 920 ℃ to 990 ℃ within 60 minutes, and keeping the temperature for 180 minutes;
the pressure in the furnace is kept at 4.2MPa, the temperature in the furnace is reduced to the room temperature from 990 ℃, and then the sintering furnace is opened to take out the finished product;
EXAMPLE six
Step one, weighing various components of the friction lining according to the weight part ratio: 60 parts of electrolytic copper powder, 5 parts of tin powder, 5 parts of flake graphite, 15 parts of artificial graphite, 4 parts of aluminum oxide, 3 parts of cobalt powder, 5 parts of reduced iron powder, 2 parts of nickel powder and 1 part of molybdenum disulfide to obtain a premix;
step two, putting the premix weighed in the step one into a V-shaped mixer, and stirring for 4 hours to uniformly mix the premix and the V-shaped mixer to obtain a finished mixture;
step three, mounting a preset model die on a hydraulic machine, and putting the mixture obtained in the step two into a die cavity for cold press molding to obtain a friction lining blank, wherein the working pressure is set to be 19MPa, and the pressure maintaining time is set to be 2 seconds;
step four, placing the friction lining blank prepared in the step three into a sintering furnace, and sintering and curing the friction lining blank according to the following modes:
under the condition of normal pressure, within 100 minutes, the temperature in the furnace is increased from room temperature to 400 ℃, and the temperature is kept for 60 minutes;
under the condition of normal pressure, the temperature in the furnace is increased from 400 ℃ to 700 ℃ within 60 minutes;
increasing the pressure in the furnace to 2.3MPa, and increasing the temperature in the furnace from 700 ℃ to 950 ℃ within 150 minutes;
increasing the pressure in the furnace to 4.6MPa, increasing the temperature in the furnace from 950 ℃ to 990 ℃ within 60 minutes, and keeping the temperature for 200 minutes;
the pressure in the furnace is kept at 4.6MPa, the temperature in the furnace is reduced to the room temperature from 990 ℃, and then the sintering furnace is opened to take out the finished product;
the performance test was performed on the finished friction linings obtained in examples one to six, and the test data are shown in fig. 1.
The brake pad for the wind power coupling is formed by assembling a friction lining and a copper-plated substrate into a whole, wherein the thickness of a copper-plated layer of the copper-plated substrate is not less than 20 mu m, the copper-plated substrate and the friction lining can be simultaneously stacked in a sintering furnace for curing treatment, and the sintering process also adopts the segmented pressurizing and heating mode.
Claims (7)
1. A friction lining for a wind power coupling, characterized in that: the paint comprises the following components in parts by weight: 60 to 70 parts of electrolytic copper powder, 8 to 18 parts of adhesive, 7 to 20 parts of wear-resistant agent, and 10 to 34 parts of friction reducer; wherein the adhesive comprises 4 to 8 parts of tin powder, 2 to 5 parts of nickel powder and 2 to 5 parts of cobalt powder.
2. A friction lining for a wind power coupling according to claim 1, wherein: the anti-wear agent comprises 2 to 10 parts of alumina and 5 to 10 parts of reduced iron powder.
3. A friction lining for a wind power coupling according to claim 1 or 2, characterized in that: the friction reducer comprises 1 to 6 parts of molybdenum disulfide and 9 to 28 parts of graphite.
4. A friction lining for a wind power coupling according to claim 3, wherein: the graphite comprises 5 to 13 parts of crystalline flake graphite and 4 to 15 parts of granular graphite.
5. A method of making a friction lining characterized by: a friction lining for a wind power coupling for producing a wind power coupling according to claims 1 to 4, comprising the steps of:
step one, weighing various components of the friction lining according to the weight part ratio: the electrolytic copper powder comprises 60 to 70 parts of electrolytic copper powder, 4 to 8 parts of tin powder, 2 to 5 parts of nickel powder, 2 to 5 parts of cobalt powder, 2 to 10 parts of alumina, 5 to 10 parts of reduced iron powder, 1 to 6 parts of molybdenum disulfide, 5 to 13 parts of flake graphite and 4 to 15 parts of granular graphite;
step two, putting the components weighed in the step one into a V-shaped mixer, and stirring for 3 to 4 hours to uniformly mix the components;
step three, cold press molding, namely adding the raw materials mixed in the step three into a die cavity of a hydraulic press, pressurizing to 15-20 MPa, and demolding after molding to obtain a blank;
and step four, sintering and curing, namely placing the blank prepared in the step four into a sintering furnace, and sintering and curing the blank in a sectional pressurizing and heating manner.
6. The method for producing a friction lining according to claim 5, wherein: the sectional pressurizing and heating mode is that,
firstly, under the condition of normal pressure, within 90-100 minutes, the temperature in the furnace is raised from room temperature to 400 ℃, and the temperature is kept for 50-60 minutes;
secondly, under the condition of normal pressure, within 60-90 minutes, the temperature in the furnace is increased from 400 ℃ to 650-750 ℃;
thirdly, the pressure in the furnace is between 2 and 2.5MPa, and the temperature in the furnace is increased from 650-750 ℃ to 900-950 ℃ within 150 minutes;
7. A brake piece for a wind power coupling, characterized in that: comprises a copper-plated substrate and a friction lining arranged on the copper-plated substrate; wherein the friction lining is as defined in claims 1 to 4
The friction lining of (3), wherein the copper-plated layer of said copper-plated substrate has a thickness of not less than 20 μm.
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| CN202011012840.1A CN112081848A (en) | 2020-09-24 | 2020-09-24 | Friction lining for wind power coupler and preparation method thereof |
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| CN202011012840.1A CN112081848A (en) | 2020-09-24 | 2020-09-24 | Friction lining for wind power coupler and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116571742A (en) * | 2023-07-12 | 2023-08-11 | 衡水众成摩擦材料有限公司 | Copper-based powder metallurgy friction lining and preparation method and application thereof |
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| 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 |
| KR20130088313A (en) * | 2012-01-31 | 2013-08-08 | 주식회사 에스지오 | Sintered metallic friction material for brake pad |
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| CN111043199A (en) * | 2019-12-17 | 2020-04-21 | 湘电风能有限公司 | Powder metallurgy material and method for preparing wind power yaw brake pad |
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