CN211801213U - Low-cost and repairable ceramic alloy composite grinding roller - Google Patents
Low-cost and repairable ceramic alloy composite grinding roller Download PDFInfo
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- CN211801213U CN211801213U CN202020013704.3U CN202020013704U CN211801213U CN 211801213 U CN211801213 U CN 211801213U CN 202020013704 U CN202020013704 U CN 202020013704U CN 211801213 U CN211801213 U CN 211801213U
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Abstract
The utility model discloses a low-cost and repairable ceramic alloy composite grinding roller, which comprises a ceramic prefabricated part, a metal ceramic composite roller skin lining plate, a grinding roller core, a clamping groove, a bolt, an end face flange and a ceramic cover, wherein the roller skin lining plate is formed by combining the ceramic prefabricated part and a wear-resistant alloy material, and the grinding roller core is formed by casting a parent metal material; the metal ceramic composite roll skin lining plate is assembled through a clamping groove structure arranged at the small end of the roll core, the end face flange, the large end of the roll core of the grinding roll and the large end of the metal ceramic composite roll skin lining plate are tightly pressed and fixed through bolts, and a ceramic cover is embedded above the bolts. The utility model discloses grinding roller later stage wearing and tearing back need not to change the roller core, can carry out the on-the-spot end flange of dismantling, tears the serious roller skin welt in wearing and tearing down, the installation more renew the roller skin welt can, can realize the repairable of pottery grinding roller, the purchase cost of greatly reduced grinding roller.
Description
Technical Field
The utility model relates to a low-cost, but repair formula combined ceramic roller is applicable in various welts of trades such as thermal power, cement, metallurgy, mine.
Background
In industries such as electric power, cement, metallurgy, mine and the like, the grinding roller is widely used in a powder making system and is used as a main wear-resistant part, and the wear resistance of the grinding roller directly influences the operation rate of powder making, the quality of pulverized coal, the consumption of the grinding roller and the production cost. Any grinding roller material is abraded seriously under the working condition of pulverizing, so that the coal powder efficiency of the coal mill is reduced after the grinding roller is abraded by serious pits and grooves, and the output of the coal mill is insufficient.
Most of grinding rollers used in the existing thermal power plant are integrally cast by high-chromium cast iron, the wear-resistant alloy layer is repeatedly surfacing welded on the grinding rollers after operation and abrasion, so that the service life of the grinding rollers can be prolonged, the times are limited, the cost is high, the surfacing layer is easy to fall off, and meanwhile, the frequent shutdown maintenance of the power plant causes great economic loss. The process solves the problems of short service life and high price of the whole high-chromium alloy grinding roller, but the defects of non-wear resistance of the ball-milled cast iron exist between each lining plate and the lining plate on the whole roller surface, once the wear is serious, the ceramic alloy lining plate can be accelerated, in addition, the whole grinding roller can not be repaired and directly scrapped after scrapping, and a large amount of maintenance cost is increased for a power plant.
SUMMERY OF THE UTILITY MODEL
Utility model purpose: the utility model aims at solving the defects in the prior art and providing a low-cost and repairable ceramic alloy composite grinding roller.
The technical scheme is as follows: the utility model discloses a low-cost, compound roller of repairable formula ceramal, including ceramic prefab, the compound roller skin welt of cermet, roller core, draw-in groove, bolt, end flange and ceramic lid, the compound roller skin welt of cermet combine with wear-resisting alloy material by ceramic prefab to form, ceramic prefab fixes on the ceramic alloy wearing parts casting mould cavity surface, obtains the compound roller skin welt of cermet that the surface combines by ceramic prefab and wear-resisting alloy material through pouring wear-resisting alloy molten metal, roller core be formed by the casting of parent metal material; the small head of the metal ceramic composite roll skin lining plate is assembled at the small head of the roll core with a clamping groove structure, the end face flange, the large head of the roll core of the grinding roll and the large head of the metal ceramic composite roll skin lining plate are pressed and fixed through bolts, and a ceramic cover is embedded above the bolts.
Further, the surface of the ceramic prefabricated part is in a honeycomb shape or a grid shape.
Further, the thickness of the ceramic prefabricated member is 10-60 mm.
Further, the bottom surface of the ceramic prefabricated member is a plane or a curved surface.
Furthermore, the clamping groove structure of the small end of the roller core is in an arc shape or an inverted angle shape, and the angle is smaller than 90 degrees.
Furthermore, the inner arc surface of the metal ceramic composite roller skin lining plate is provided with a groove.
Further, the area of the groove accounts for 50-70% of the area of the inner arc surface curved surface.
Furthermore, the grooves are distributed in a shape like a Chinese character 'tian'.
Further, the wear-resistant alloy material is high-chromium cast iron or high-manganese steel.
Further, the parent metal material is one of nodular cast iron, low-carbon steel or medium-carbon steel.
Has the advantages that: the utility model has the advantages as follows:
(1) the inner arc mounting surface of the roller shell lining plate adopts a groove-shaped structure, so that the polishing area can be reduced when the roller shell lining plate and a roller core are assembled, and the production cost is reduced;
(2) the roller core is made of common metal materials, so that the hardness is low, the processing is easy, and the machining cost is greatly reduced;
(3) after the grinding roller is worn later, the roller core does not need to be replaced, the end face flange can be disassembled on site, the roller shell lining plate which is seriously worn is disassembled, and a new roller shell lining plate is installed and replaced, so that the repairability of the ceramic grinding roller can be realized, and the purchase cost of the grinding roller is greatly reduced;
(4) the working surface of the grinding roller is formed by the abrasion-resistant alloy and the metal ceramic composite material in a staggered mode, is honeycomb-shaped, has double abrasion-resistant performance, and the service life of the high-chromium cast iron grinding roller is prolonged to more than 2 times.
Drawings
FIG. 1 is a sectional view of the composite grinding roller of the present invention;
FIG. 2 is a schematic view of the three-dimensional structure of the composite grinding roller of the present invention;
FIG. 3 is a schematic structural view of the honeycomb ceramic preform of the present invention;
FIG. 4 is a cross-sectional view of the structure of FIG. 3;
FIG. 5 is a schematic structural view of the roll skin lining plate of the present invention;
FIG. 6 is a cross-sectional view of the structure of FIG. 5;
FIG. 7 is a schematic structural view of the roll core of the present invention;
FIG. 8 is a cross-sectional view of the structure of FIG. 7;
fig. 9 is a schematic structural view of an end face flange of the present invention;
FIG. 10 is a cross-sectional view of the structure of FIG. 9;
fig. 11 is a schematic structural view of the clamp of the present invention.
Detailed Description
The technical solution of the present invention will be further described in detail with reference to the following specific embodiments.
As shown in fig. 1 to 11, the low-cost repairable ceramal composite grinding roller comprises a ceramic prefabricated part 1, a metal ceramic composite roller skin lining plate 2, a grinding roller core 3, a clamping groove 4, a bolt 5, an end flange 6 and a ceramic cover 7, wherein the metal ceramic composite roller skin lining plate 2 is formed by combining the ceramic prefabricated part 1 and a wear-resistant alloy material, the ceramic prefabricated part 1 is fixed on the surface of a ceramic alloy wear-resistant part casting mold cavity, the metal ceramic composite roller skin lining plate 2 with the surface combined by the ceramic prefabricated part 1 and the wear-resistant alloy material is obtained by pouring a wear-resistant alloy molten metal, and the grinding roller core 3 is formed by casting a parent metal material; the small end of the metal ceramic composite roll skin lining plate 2 is assembled at the small end of a roll core with a clamping groove structure, an end face flange 6, a grinding roll core 3 and the large end of the metal ceramic composite roll skin lining plate 2 are pressed and fixed through a bolt 5, and a ceramic cover 7 is embedded above the bolt 5.
The surface of the ceramic prefabricated member 1 is in a honeycomb shape or a grid shape, the thickness of the ceramic prefabricated member is 10-60mm, and the bottom surface of the ceramic prefabricated member is a plane or a curved surface.
The grinding roller core 3 is formed by casting a parent metal material, wherein the parent metal material is one of nodular cast iron, low-carbon steel or medium-carbon steel, firstly the parent metal material forms molten metal, and then the molten metal is poured into a casting mold cavity to obtain the grinding roller core 3.
During assembly, the small end of the metal ceramic composite roll skin lining plate 2 after the heat treatment and the machining grinding alloy hardness reaches 60-64HRC is assembled at the small end of the roll core with a clamping groove structure, the clamping groove structure is in an arc shape or an inverted angle shape, and the angle is smaller than 90 degrees. Fixing the metal ceramic composite roll skin lining plate 2 on the surface of the roll core 3 of the grinding roll by using a circumferential hoop (as shown in figure 11), pressing and fixing an end face flange 6 with the roll core 3 of the grinding roll and the big end of the metal ceramic composite roll skin lining plate 2 by using a bolt 5, removing the hoop, and embedding a ceramic cover 7 above the bolt 5 to obtain the low-cost and repairable ceramic alloy composite grinding roll compounded by the metal ceramic composite roll skin lining plate 2 and the roll core 3 of the grinding roll.
As shown in fig. 5 and 6, the inner arc surface of the metal ceramic composite roll skin lining plate 2 is also provided with grooves, the area of the grooves accounts for 50-70% of the curved surface area of the inner arc surface, and the grooves are distributed in a shape like a Chinese character 'tian'. The inner arc mounting surface of the lining plate of the roller shell adopts a groove-shaped structure, and the grinding area can be reduced and the production cost can be reduced when the inner arc mounting surface is assembled with a roller core of a grinding roller.
The composite grinding roller comprises a grinding roller core which is formed by casting a matrix metal material, wherein a metal ceramic composite roller skin lining plate is arranged on the surface of the grinding roller core, a groove is formed in the inner arc surface of the roller skin lining plate, the roller skin lining plate and the roller core are fixed through end face flanges, bolt holes are formed in the end face flanges, bolts connected with the roller core are installed in the bolt holes, the metal ceramic composite roller skin lining plate is formed by composite casting of a wear-resistant alloy material and a ceramic prefabricated member, and the ceramic prefabricated member is formed by mixing ceramic particles, a binder and ceramic powder under normal pressure.
The specific manufacturing method of the low-cost and repairable ceramic alloy composite grinding roller comprises the following steps:
(1) carrying out surface metallization pretreatment on ceramic particles with the particle size of 8-30 meshes;
(2) uniformly mixing the pretreated ceramic particles with a binder according to a certain proportion, wherein the addition amount of the binder is 1-6% of the mass of the ceramic;
(3) adding a certain proportion of ceramic powder into the mixture obtained in the step (2) and uniformly mixing to obtain a particle mixture, wherein the particle size of the ceramic powder is 200-500 meshes, and the adding amount is 1-8% of the mass of the mixture;
(4) uniformly loading the particle mixture obtained in the step (3) into a foamed ceramic boat mould, putting the whole ceramic boat after compaction into a drying oven for drying at 50-200 ℃ for 24-72 hours, and demoulding after drying out of the oven to obtain a ceramic prefabricated member;
(5) fixing the ceramic prefabricated part on the surface of the casting cavity of the roller skin lining plate, and then pouring wear-resistant alloy metal liquid to obtain a metal ceramic composite roller skin lining plate with the surface metallurgically bonded by the ceramic prefabricated part and the wear-resistant alloy material;
(6) carrying out heat treatment on the metal ceramic roller skin lining plate obtained in the step (5) to ensure that the surface hardness of the metal ceramic roller skin lining plate reaches 58-62HRC, and machining the heat-treated roller skin lining plate;
(7) smelting a parent metal material to form molten metal, pouring the molten metal into a casting mold cavity to obtain a roller core of the grinding roller, assembling the small end of the metal ceramic roller shell lining plate subjected to heat treatment in the step (6) on the small end of the roller core with a clamping groove structure, fixing the metal ceramic roller shell lining plate on the surface of the roller core by using a circumferential hoop, tightly pressing and fixing the end flange, the large end of the roller core and the large end of the metal ceramic roller shell lining plate by using bolts, removing the hoop, and embedding a ceramic cover above the bolts to obtain the low-cost and repairable ceramic alloy composite grinding roller compounded by the metal ceramic roller shell lining plate and the roller core.
Wherein, the ceramic particle metallization pretreatment is to coat the surface of the ceramic particle with an iron-based, nickel-based or cobalt-based low-melting-point alloy material.
Wherein, the ceramic particles are one or the combination of any more of alumina, zirconia, silicon carbide, titanium carbide, tungsten carbide and titanium nitride.
Wherein, the binder is one or the combination of any more of silica sol, water glass, aluminum sol, sodium carbonate, polyvinyl alcohol and phenolic resin.
Wherein, the ceramic powder is one or the combination of any several of boron carbide, silicon carbide and yttrium oxide.
Wherein, the wear-resistant alloy material in the step (5) is high-chromium cast iron or high-manganese steel.
Wherein, the parent metal material in the step (7) is one of nodular cast iron, low-carbon steel or medium-carbon steel.
The above description is only a preferred embodiment of the present invention, and the present invention is not limited to the above embodiments, and although the present invention has been disclosed with the preferred embodiments, it is not limited to the present invention, and any skilled person in the art can make some modifications or equivalent embodiments without departing from the scope of the present invention, but all the technical matters of the present invention are within the scope of the present invention.
Claims (10)
1. The utility model provides a low-cost, repairable formula ceramal composite grinding roller which characterized in that: the roll core is characterized by comprising a ceramic prefabricated part (1), a metal ceramic composite roll skin lining plate (2), a roll core (3), a clamping groove (4), a bolt (5), an end face flange (6) and a ceramic cover (7), wherein the metal ceramic composite roll skin lining plate (2) is formed by combining the ceramic prefabricated part (1) and a wear-resistant alloy material, the ceramic prefabricated part (1) is fixed on the surface of a ceramic alloy wear-resistant part casting mold cavity, the metal ceramic composite roll skin lining plate (2) with the surface combined by the ceramic prefabricated part (1) and the wear-resistant alloy material is obtained by pouring a wear-resistant alloy metal liquid, and the roll core (3) is formed by casting a parent metal material; the metal ceramic composite roll skin lining plate (2) is assembled through a clamping groove (4), an end face flange (6) and a large head of a grinding roll core (3) and a large head of the metal ceramic composite roll skin lining plate (2) are pressed and fixed through a bolt (5), and a ceramic cover (7) is embedded above the bolt (5).
2. A low-cost, repairable ceramic alloy composite grinding roll according to claim 1, wherein: the surface of the ceramic prefabricated part (1) is in a honeycomb shape or a grid shape.
3. A low cost, repairable ceramic alloy composite grinding roll according to claim 1 or 2, wherein: the thickness of the ceramic prefabricated part (1) is 10-60 mm.
4. A low cost, repairable ceramic alloy composite grinding roll according to claim 1 or 2, wherein: the bottom surface of the ceramic prefabricated part (1) is a plane or a curved surface.
5. A low-cost, repairable ceramic alloy composite grinding roll according to claim 1, wherein: the small end of the grinding roller core (3) is of a clamping groove structure, the clamping groove structure is in an arc shape or an inverted angle shape, and the angle is smaller than 90 degrees.
6. A low-cost, repairable ceramic alloy composite grinding roll according to claim 1, wherein: the inner arc surface of the metal ceramic composite roll skin lining plate (2) is provided with a groove.
7. A low-cost, repairable ceramic alloy composite grinding roll according to claim 6, wherein: the area of the groove accounts for 50-70% of the area of the inner arc surface curved surface.
8. A low-cost, repairable ceramic alloy composite grinding roll according to claim 6, wherein: the grooves are distributed in a shape like a Chinese character 'tian'.
9. A low-cost, repairable ceramic alloy composite grinding roll according to claim 1, wherein: the wear-resistant alloy material is high-chromium cast iron or high-manganese steel.
10. A low-cost, repairable ceramic alloy composite grinding roll according to claim 1, wherein: the matrix metal material is one of nodular cast iron, low-carbon steel or medium-carbon steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020013704.3U CN211801213U (en) | 2020-01-06 | 2020-01-06 | Low-cost and repairable ceramic alloy composite grinding roller |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020013704.3U CN211801213U (en) | 2020-01-06 | 2020-01-06 | Low-cost and repairable ceramic alloy composite grinding roller |
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| CN211801213U true CN211801213U (en) | 2020-10-30 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113718175A (en) * | 2021-09-02 | 2021-11-30 | 常熟市电力耐磨合金铸造有限公司 | Metal ceramic inlaid composite roller |
| CN114290708A (en) * | 2021-12-30 | 2022-04-08 | 中国科学院长春光学精密机械与物理研究所 | Integrated forming preparation process for large-size carbon fiber plate type workpiece |
| CN114505135A (en) * | 2022-01-21 | 2022-05-17 | 郑州机械研究所有限公司 | Metal-based ceramic composite grinding roller and preparation method thereof |
| CN114290708B (en) * | 2021-12-30 | 2024-04-26 | 中国科学院长春光学精密机械与物理研究所 | Integrated molding preparation process for large-size carbon fiber plate-type workpiece |
-
2020
- 2020-01-06 CN CN202020013704.3U patent/CN211801213U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113718175A (en) * | 2021-09-02 | 2021-11-30 | 常熟市电力耐磨合金铸造有限公司 | Metal ceramic inlaid composite roller |
| CN113718175B (en) * | 2021-09-02 | 2022-10-11 | 常熟市电力耐磨合金铸造有限公司 | Metal ceramic inlaid composite roller |
| CN114290708A (en) * | 2021-12-30 | 2022-04-08 | 中国科学院长春光学精密机械与物理研究所 | Integrated forming preparation process for large-size carbon fiber plate type workpiece |
| CN114290708B (en) * | 2021-12-30 | 2024-04-26 | 中国科学院长春光学精密机械与物理研究所 | Integrated molding preparation process for large-size carbon fiber plate-type workpiece |
| CN114505135A (en) * | 2022-01-21 | 2022-05-17 | 郑州机械研究所有限公司 | Metal-based ceramic composite grinding roller and preparation method thereof |
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