阅读说明：本技术 一种使用稳定的碳块及其制备工艺 (Carbon block stable in use and preparation process thereof ) 是由 张建新 庄建平 于 2020-05-25 设计创作，主要内容包括：本发明公开了一种使用稳定的碳块及其制备工艺。碳块主要包含如下原料：石墨粉、粘合剂、云母粉、阻燃粉和润滑剂,其制备方法为：通过分筛组件分筛石墨粉,破碎大颗粒的原料颗粒；混入云母粉和阻燃粉,将混合的原料倒入搅拌装置中,加热搅拌；静置混合的物料,待物料充分冷却后再度对其进行破碎处理,破碎处理后的物料由分筛组件二度分筛；将粘合剂和润滑剂加入分筛后的物料中,再将物料移运至密封焙烧炉内高温煅烧,出炉冷却的物料再经机械加工以制得产品；其具有有效减少碳块在使用过程中出现火花溅射的现象,进而可有效保障碳块的使用稳定性,并保障其正常使用寿命的优点；另外,本发明的制备方法具有碳块制备工艺简单、易于操作的优点。(The invention discloses a carbon block stable in use and a preparation process thereof. The carbon block mainly comprises the following raw materials: graphite powder, adhesive, mica powder, flame retardant powder and lubricant, and the preparation method comprises the following steps: screening the graphite powder by a screening component, and crushing large-particle raw material particles; mixing mica powder and flame retardant powder, pouring the mixed raw materials into a stirring device, heating and stirring; standing the mixed materials, crushing the materials again after the materials are fully cooled, and screening the crushed materials by a screening component for two degrees; adding an adhesive and a lubricant into the sieved material, transferring the material into a sealed roasting furnace for high-temperature calcination, and mechanically processing the discharged and cooled material to obtain a product; the carbon block has the advantages that the phenomenon of spark sputtering in the use process of the carbon block is effectively reduced, the use stability of the carbon block can be effectively guaranteed, and the normal service life of the carbon block is guaranteed; in addition, the preparation method has the advantages of simple carbon block preparation process and easy operation.)

1. A carbon block stable in use is characterized by comprising the following raw materials in parts by weight: 20-35 parts of graphite powder, 45-70 parts of adhesive, 5-12 parts of mica powder, 6-15 parts of flame retardant powder and 3-8 parts of lubricant.

2. The carbon block stabilized by use of claim 1, wherein said graphite powder is composed of 299 graphite powder and FM-50 graphite powder, and the ratio of the parts by weight of 299 graphite powder to FM-50 graphite powder is 1: 1.

3. The carbon block stabilized by use of claim 1, wherein said binder is composed of T999 binder powder and asphalt, and the ratio of T999 binder powder to asphalt is 1.2:1 by weight.

4. A use stabilized carbon block as claimed in claim 1 wherein said lubricant is tungsten disulphide.

5. A process for the preparation of a carbon block using stabilization according to claims 1-4, characterized by the following steps: s100, preprocessing, namely screening graphite powder through a screening component, and crushing large-particle raw materials; mixing mica powder and flame retardant powder, pouring the mixed raw materials into a stirring device, heating and stirring; s200, cooling, then processing, standing the mixed material, fully cooling the material, then crushing the material again, and screening the crushed material by a screening component for two degrees; s300, mixing materials, calcining at high temperature, adding an adhesive and a lubricant into the sieved materials, transferring the materials into a sealed roasting furnace for calcining at high temperature, and mechanically processing the discharged and cooled materials to obtain the product.

6. The process for preparing carbon block using stabilization as claimed in claim 5, wherein the temperature of the material heating and stirring in step S100 is controlled to be 100-250 ℃.

7. The process for preparing using stabilized carbon block as claimed in claim 6, wherein in step S100, the time for heating and stirring the material is at least more than 1 h.

8. The preparation process using the stabilized carbon block as claimed in claim 5, wherein in step S200, the standard of the secondary screening of the material by the screening component is 120-180 mesh.

9. The process for preparing carbon block using stabilization according to claim 5, wherein the calcination temperature of the material in the sealed roasting furnace is controlled to 2200-3500 ℃ in step S300.

10. The process for preparing using stabilized carbon block as claimed in claim 9, wherein in step S300, the calcination time of the material in the high temperature roasting furnace is 6-8h, and the calcination process must be continuously performed.

Technical Field

The invention relates to the field of carbon brush materials, in particular to a carbon block stable in use and a preparation process thereof.

Background

Carbon brushes are graphite blocks, commonly referred to as carbon blocks, that transfer energy or signals between a stationary and a rotating part of an electric motor, generator or other rotating machinery. The carbon block can be used as an important conducting medium in the motor, and has extremely low friction coefficient and excellent self-lubricating effect, so that the normal operation of the motor can be effectively guaranteed. Meanwhile, the carbon block has low acquisition cost and is easy to replace, so the carbon block is widely applied to various large motor devices.

Chinese patent publication No. CN1495975A is a carbon brush which provides a resin-cured carbon brush having excellent heat dissipation and an improved brush life, and the resin-cured carbon brush is produced by adding a fatty acid amide in an amount of 0.1 to 3.0 when a filler and a binder thermosetting resin are kneaded together to produce a molded carbon brush.

The prior art described above has the following drawbacks: the common carbon block is frequently worn between the fixed end and the rotating end of the motor in the use process, so that the phenomenon of spark sputtering between the carbon block and a motor component is easily caused, the use stability of the carbon block is easily influenced, the normal service life of the carbon block is shortened, and the improvement is needed.

Disclosure of Invention

Aiming at the defects in the prior art, the first purpose of the invention is to provide a carbon block which is stable in use and has the advantages that the phenomenon of spark sputtering in the use process of the carbon block can be effectively reduced, the use stability of the carbon block can be effectively ensured, and the normal service life of the carbon block can be ensured.

The second purpose of the invention is to provide a preparation process using a stable carbon block, which has the advantages of simple preparation process and easy operation.

In order to achieve the first object, the invention provides the following technical scheme: a stable carbon block comprises the following raw materials in parts by weight: 20-35 parts of graphite powder, 45-70 parts of adhesive, 5-12 parts of mica powder, 6-15 parts of flame retardant powder and 3-8 parts of lubricant.

By adopting the technical scheme, the adhesion degree among the raw material components in the carbon block is improved by adopting the adhesive, so that the quality of the formed carbon block can be more stable; the mica powder is used for increasing the wear resistance and high temperature resistance of each carbon block finished product and the adhesive strength of each raw material component in the carbon block during forming, so that the use quality and the service life of the formed carbon block are effectively guaranteed; the lubricant is used for reducing the friction coefficient of the finished carbon block, and simultaneously can improve the compressive strength of the carbon block, thereby achieving the effects of prolonging the service life of the carbon block and improving the smoothness of the outer surface of the product, effectively reducing the phenomenon of spark sputtering when the carbon block operates in a motor, and ensuring the use stability and the normal service life of the carbon block by reducing scratches on the outer surface of the carbon block.

Furthermore, the graphite powder consists of 299 graphite powder and FM-50 graphite powder, and the ratio of the 299 graphite powder to the FM-50 graphite powder in parts by weight is 1: 1.

By adopting the technical scheme, the two different types of graphite powder have the characteristics of high crystallinity and high purity, and have better high temperature resistance and self-lubricating property compared with the common single graphite powder under the same use environment, so that the use quality and the stability of the finished carbon block can be effectively guaranteed.

Further, the adhesive consists of T999 adhesive powder and asphalt, and the weight ratio of the T999 adhesive powder to the asphalt is 1.2: 1.

By adopting the technical scheme, the T999 glue agent powder has the characteristic of quickly bonding all raw materials, the asphalt is a high-viscosity organic cementing material, and the bonding firmness and viscosity of the raw materials can be improved after the asphalt and the raw materials are matched with each other, so that the finished carbon block has stronger plasticity in the forming process, and the quality stability of the finished carbon block is greatly improved.

Further, the lubricant is tungsten disulfide.

By adopting the technical scheme, when the tungsten disulfide is used as the lubricant, compared with common lubricants such as molybdenum disulfide and the like, the tungsten disulfide has higher application stability and strength, can greatly improve the smoothness of the outer surface of the finished carbon block, further reduces the friction coefficient when the carbon block is abutted against foreign objects, improves the compressive strength of the carbon block, and achieves the effects of effectively ensuring the service quality and the service life of the carbon block.

In order to achieve the second object, the present invention provides a preparation process using a stable carbon block, comprising the steps of:

s100, preprocessing, namely screening graphite powder through a screening component, and crushing large-particle raw materials; mixing mica powder and flame retardant powder, pouring the mixed raw materials into a stirring device, heating and stirring;

s200, cooling, then processing, standing the mixed material, fully cooling the material, then crushing the material again, and screening the crushed material by a screening component for two degrees;

s300, mixing materials, calcining at high temperature, adding an adhesive and a lubricant into the sieved materials, transferring the materials into a sealed roasting furnace for calcining at high temperature, and mechanically processing the discharged and cooled materials to obtain the product.

By adopting the technical scheme, the carbon block with stable quality and guaranteed service life can be reproducibly prepared by enabling an operator to be simple and rapid.

Further, in the step S100, the temperature of the material during heating and stirring needs to be controlled at 100 ℃ and 250 ℃.

By adopting the technical scheme, the uniform mixing and filling degree of the raw materials can be effectively guaranteed in the temperature range of 100-250 ℃, and the raw material particles can be rapidly combined in a heating mode so as to improve the aging of subsequent production.

Further, in the step S100, the time for heating and stirring the material at least exceeds 1 h.

By adopting the technical scheme, the heating and stirring are fully carried out for a long time, the combination degree of materials can be ensured, the particle dissociation phenomenon is reduced, and the quality stability of the carbon block prepared from the raw materials can be further ensured.

Further, in the step S200, the standard of the secondary screening of the screening component on the material is 120-180 meshes.

By adopting the technical scheme, part of raw material particles with larger diameters can be effectively filtered by the secondary screening standard, so that all the raw material particles are in a uniform state in the preparation process, and the smooth finish of the outer surface of the formed raw material and the quality stability of the raw material can be effectively guaranteed.

Further, in the step S300, the calcination temperature of the material in the sealed calcined aluminum is controlled to be 2200-.

By adopting the technical scheme, the high-low peak value of the calcining temperature is limited, the phenomenon of inconsistent quality during product forging can be effectively reduced, and the quality stability and uniformity of all finished carbon blocks are further effectively guaranteed.

Further, in the step S300, the calcination time of the material in the high-temperature roasting furnace is 6-8 hours, and the calcination process must be continuously performed.

By adopting the technical scheme, the molding quality of the carbon block product can be further ensured by limiting the calcination time, and the stability and the outer surface finish degree of the carbon block after the carbon block is discharged from the furnace can be effectively ensured in the continuous calcination process.

In conclusion, the invention has the following beneficial effects:

firstly, the adhesive degree among the raw material components in the carbon block is improved by adopting the adhesive, so that the quality of the formed carbon block can be more stable; the mica powder is used for increasing the wear resistance and high temperature resistance of each carbon block finished product and the adhesive strength of each raw material component in the carbon block during forming, so that the use quality and the service life of the formed carbon block are effectively guaranteed; the lubricant is used for reducing the friction coefficient of the finished carbon block, and simultaneously can improve the compressive strength of the carbon block, thereby achieving the effects of prolonging the service life of the carbon block and improving the smoothness of the outer surface of the product, effectively reducing the phenomenon of spark sputtering when the carbon block operates in a motor, and ensuring the use stability and the normal service life of the carbon block by reducing scratches on the outer surface of the carbon block.

Secondly, the preparation method of the invention has clear flow and simple operation, and is convenient for operators to reproducibly prepare a certain amount of carbon blocks with stable quality and guaranteed service life.

Detailed Description

The present invention will be described in further detail with reference to examples.