LU503759B1 - Detachable ceramic composite metal matrix grinding roller of medium-speed coal mill - Google Patents

Detachable ceramic composite metal matrix grinding roller of medium-speed coal mill Download PDF

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Publication number
LU503759B1
LU503759B1 LU503759A LU503759A LU503759B1 LU 503759 B1 LU503759 B1 LU 503759B1 LU 503759 A LU503759 A LU 503759A LU 503759 A LU503759 A LU 503759A LU 503759 B1 LU503759 B1 LU 503759B1
Authority
LU
Luxembourg
Prior art keywords
wear pad
grinding roller
metal matrix
medium
composite metal
Prior art date
Application number
LU503759A
Other languages
German (de)
Inventor
Jia Song
Guang Yang
Xiangsheng Meng
Jiute Zhao
Shiwei Jiang
Zhonghua Ma
Xiang Li
Xin Feng
Xiangjie Ding
Pengfei Qi
Guangxu Liu
Hongliang Teng
Original Assignee
Huaneng Power Int Inc Yingkou Power Plant
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Huaneng Power Int Inc Yingkou Power Plant filed Critical Huaneng Power Int Inc Yingkou Power Plant
Application granted granted Critical
Publication of LU503759B1 publication Critical patent/LU503759B1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C15/00—Disintegrating by milling members in the form of rollers or balls co-operating with rings or discs
    • B02C15/004—Shape or construction of rollers or balls
    • B02C15/005—Rollers or balls of composite construction
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B1/00—Cleaning by methods involving the use of tools
    • B08B1/10—Cleaning by methods involving the use of tools characterised by the type of cleaning tool
    • B08B1/12—Brushes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B1/00—Cleaning by methods involving the use of tools
    • B08B1/20—Cleaning of moving articles, e.g. of moving webs or of objects on a conveyor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C15/00—Disintegrating by milling members in the form of rollers or balls co-operating with rings or discs
    • B02C15/04—Mills with pressed pendularly-mounted rollers, e.g. spring pressed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C15/00—Disintegrating by milling members in the form of rollers or balls co-operating with rings or discs
    • B02C2015/008—Roller drive arrangements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C2210/00—Codes relating to different types of disintegrating devices
    • B02C2210/02—Features for generally used wear parts on beaters, knives, rollers, anvils, linings and the like

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  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Grinding (AREA)

Abstract

A detachable ceramic composite metal matrix grinding roller of a medium-speed coal mill is provided. The present application relates to the technical field of coal mills. The grinding roller includes a housing. An inner wall of the housing is connected with a connecting rod via a connecting shaft, a screw rod is mounted on one side of the housing, a threaded sleeve is sleeved on an outer surface of the screw rod, one end of the connecting rod is connected with a mounting block, and one side of the mounting block is provided with a fixed rod, a rotatable shaft and a rotating shaft. According to the present application, the screw rod, the threaded sleeve, the connecting rod and the connecting shaft are provided. When coal powder with different particle sizes needs to be produced, the staff rotates the screw rod, and the screw rod rotates to drive the threaded sleeve to move, so that the connecting rod moves under the cooperation of the connecting shaft. In this way, a distance between the grinding roller and the grinding bowl can be adjusted, and thus the power with different particle sizes can be produced, thereby improving the functionality of grinding roller.

Description

DETACHABLE CERAMIC COMPOSITE METAL MATRIX GRINDING ROLLER
OF MEDIUM-SPEED COAL MILL
FIELD
[0001] The present application relates to the field of coal mills, in particular to a detachable ceramic composite metal matrix grinding roller of a medium-speed coal mill.
BACKGROUND
[0002] A medium-speed coal mill refers to a coal mill with a working speed ranging from 50r/min to 300r/min. A motor drives a grinding plate to rotate by a reducer, a material falls into the center of the grinding plate from a feed inlet through an air lock feeder, and the hot air enters the grinding plate from an air inlet. With the rotation of the grinding plate, the material moves towards an edge of the grinding plate under the action of centrifugal force, and is crushed by a grinding roller when passing through an annular groove on the grinding plate.
The crushed material at the edge of the grinding plate is blown by the high-speed airflow of the air ring, and the large particles directly fall onto the grinding plate for re-crushing. When the material in the airflow passes through an upper portion of a centrifuge, the coarse powder falls from a cone bucket to the grinding plate for re-grinding under the action of a rotating rotor, and the qualified fine powder leaves the grinding plate together with the airflow and is collected through by a dust collection device. The collected fine powder is the product.
[0003] In the conventional art, a distance between a grinding roller and a grinding bowl is constant, being not convenient to produce coal powder with different particle sizes according to the requirements, resulting in the poor practicability. Wear occurs after the grinding roller works for a period of time. When the grinding roller of the coal mill fails due to wear, the grinding roller is required to be replaced as a whole. Taking the HP-1003 medium-speed coal mill as an example, a diameter of the grinding roller is 1451mm, and the weight of the grinding roller is 1.71 tons, resulting in that the grinding roller is difficult to be replaced and the use cost is high. In addition, when the grinding roller grinds coal, part of the coal is easy to adhere to the grinding roller, resulting in that the sticky substances always rotate with the grinding roller. In the long run, the grinding effect of coal is affected. -1-
SUMMARY
[0004] In view of this, a detachable ceramic composite metal matrix grinding roller of a medium-speed coal mill is provided according to the present application, so as to solve the technical problems of poor practicability, short service life of the grinding roller and inconvenience in cleaning the grinding roller.
[0005] The following technical solution is provided according to the present application. A detachable ceramic composite metal matrix grinding roller of a medium-speed coal mill including a housing is provided. An inner wall of the housing is connected with a connecting rod via a connecting shaft, a screw rod is mounted on one side of the housing, a threaded sleeve is sleeved on an outer surface of the screw rod, one end of the connecting rod is connected with a mounting block, one side of the mounting block is provided with a fixed rod, a rotatable shaft and a rotating shaft, a rotating roller is mounted at one end of the rotating shaft, an outer surface of the rotating roller is provided with a first anti-wear pad and a second anti-wear pad, one end of the rotatable shaft is connected with a fan blade, an outer surface of the rotatable shaft is provided with a driven gear, an outer surface of the rotating shaft is provided with a driving gear, and the bottom of the fixed rod is provided with a brush strip.
[0006] According to an embodiment of the present application, one end of the screw rod is connected with a knob, and an outer surface of the knob is provided with anti-slip stripes.
[0007] By using the above technical solution, the knob facilitates the rotation of the screw rod, and the anti-slip stripes can increase the friction force of the knob, so that the knob rotates more conveniently.
[0008] According to an embodiment of the present application, the driving gear is meshed with the driven gear, and a diameter of the driving gear is larger than a diameter of the driven gear.
[0009] By using the above technical solution, the driving gear can drive the driven gear to rotate, and the driven gear can rotate quickly when the driving gear rotates.
[0010] According to an embodiment of the present application, a sink is defined on one side of the first anti-wear pad and a sink 1s defined on one side of the second anti-wear pad, and a bolt is provided inside the sink. -2-
[0011] By using the above technical solution, the sinks facilitate the accommodation and hiding of the bolts, to prevent the wear of the bolts. The first anti-wear pad and the second anti-wear pad can be mounted more conveniently with the bolts.
[0012] According to an embodiment of the present application, an insertion groove 1s defined on one side of the first anti-wear pad, an insertion block is provided on one side of the second anti-wear pad, and the insertion block is matched with the insertion groove.
[0013] By using the above technical solution, the first anti-wear pad and the second anti-wear pad can be mounted more conveniently and stably with the insertion groove and the insertion block.
[0014] According to an embodiment of the present application, an outer surface of the first anti-wear pad and an outer surface of the second anti-wear pad are provided with bevel teeth.
[0015] By using the above technical solution, with the bevel teeth, the coal can be crushed easier and more thoroughly.
[0016] According to an embodiment of the present application, the brush strip is made of nylon, and the bottom of the brush strip is in contact with an outer surface of the first anti-wear pad and an outer surface of the second anti-wear pad.
[0017] By using the above technical solution, the first anti-wear pad and the second anti-wear pad are always in contact with the brush strip when the grinding roller rotates, and the brush strip can brush off sticky powder.
[0018] According to an embodiment of the present application, the number of the first anti-wear pad is greater than one, the number of the second anti-wear pad is greater than one, the first anti-wear pad and the second anti-wear pad are made of ceramic-reinforced metal matrix composites.
[0019] By using the above technical solution, the strength of the anti-wear pads is enhanced, so that the first anti-wear pad and the second anti-wear pad are more wear-resistant and more practical.
[0020] In summary, the present application can achieve at least the following beneficial effects:
[0021] 1. According to the present application, the screw rod, the threaded sleeve, the -3-
connecting rod and the connecting shaft are provided. When coal powder with different particle sizes needs to be produced, the staff rotates the screw rod, and the screw rod rotates to drive the threaded sleeve to move, so that the connecting rod moves under the cooperation of the connecting shaft, a distance between the grinding roller and the grinding bowl can be adjusted, and thus the power with different particle sizes can be produced, thereby improving the functionality of grinding roller.
[0022] 2. According to the present application, the first anti-wear pad, the second anti-wear pad, the insertion block, the insertion groove and the bolts are provided. When the first anti-wear pad and the second anti-wear pad are worn, the staff can loosen the bolts, so that the first anti-wear pad and the second anti-wear pad can be detached from the rotating roller.
When the first anti-wear pad and the second anti-wear pad are to be mounted, the staff inserts the insertion block into the insertion groove, and then fixes the anti-wear pads to the rotating roller by the bolts, without replacing the whole grinding roller, thereby saving the material cost of replacing the grinding roller;
[0023] 3. According to the present application, the driving gear, the driven gear, the rotatable shaft, the fan blade and the brush strip are provided. The rotating shaft rotates during the grinding, so that the driving gear drives the driven gear to rotate. The rotation of the driven gear enables the rotatable shaft to drive the fan blade to rotate, the brush strip can brush off the sticky powder; the fan blade generates wind during rotation, and the grinding roller can be cleaned with the cooperation of the fan blade and the brush strip, thereby preventing sticky substances from always rotating with the grinding roller to affect the grinding effect of the coal.
BRIEF DESCRIPTION OF THE DRAWINGS
[0024] FIG. 1 is a schematic structural view of a detachable ceramic composite metal matrix grinding roller of a medium-speed coal mill of the present application;
[0025] FIG. 2 is a schematic structural view of a first anti-wear pad and a second anti-wear pad of the present application;
[0026] FIG. 3 is a schematic structural view of a brush strip of the present application; and
[0027] FIG. 4 is a schematic enlarged view of portion A in FIG. 1 according to the present -4.
application.
[0028] Reference numerals are as follows: 1, housing; 2, screw rod; 3, knob; 4, connecting rod; 5, connecting shaft; 6, mounting block; 7, rotating shaft; 8, rotating roller; 9, driving gear; 10, rotatable shaft; 11, driven gear; 12, fan blade; 13, fixed rod; 14, brush strip; 15, first anti-wear pad; 16, second anti-wear pad; 17, bevel teeth; 18, insertion block; 19, insertion groove; 20, sink; 21, bolt; 22, threaded sleeve.
DETAILED DESCRIPTION OF EMBODIMENTS
[0029] The technical solutions in embodiments of the present application are described clearly and completely in conjunction with the drawings in embodiments of the present application hereinafter. The embodiments described below with reference to the drawings are only exemplary embodiments which are used to explain the present application, and should not be construed to limit the present application.
[0030] The embodiments of the present application are described below according to the overall structure of the present application.
[0031] As shown in FIG. 1 to FIG. 4, a detachable ceramic composite metal matrix grinding roller of a medium-speed coal mill including a housing 1 is provided. An inner wall of the housing 1 is connected with a connecting rod 4 via a connecting shaft 5, a screw rod 2 is mounted on one side of the housing 1, one end of the screw rod 2 is connected with a knob 3, and an outer surface of the knob 3 is provided with anti-slip stripes. The knob 3 facilitates the -5.
rotation of the screw rod 2, and the anti-slip stripes can increase the friction force of the knob 3, so that the knob 3 rotates more conveniently. À threaded sleeve 22 is sleeved on an outer surface of the screw rod 2, one end of the connecting rod 4 is connected with a mounting block 6, one side of the mounting block 6 1s provided with a fixed rod 13, a rotatable shaft 10 and a rotating shaft 7, a rotating roller 8 is mounted at one end of the rotating shaft 7, an outer surface of the rotating roller 8 is provided with a first anti-wear pad 15 and a second anti-wear pad 16, a sink 20 is defined on one side of the first anti-wear pad 15 and a sink 20 is defined on one side of the second anti-wear pad 16, and a bolt 21 is provided inside the sink 20. The sinks 20 facilitate the accommodation and hiding of the bolts 21, to prevent the wear of the bolts 21. The first anti-wear pad 15 and the second anti-wear pad 16 are mounted more conveniently with the bolts 21. An insertion groove 19 is defined on one side of the first anti-wear pad 15, an insertion block 18 is provided on one side of the second anti-wear pad 16, and the insertion block 19 is matched with the insertion groove 18. The first anti-wear pad 15 and the second anti-wear pad 16 are mounted more conveniently and stably with the insertion groove 19 and the insertion block 18. An outer surface of the first anti-wear pad 15 and an outer surface of the second anti-wear pad 16 are provided with bevel teeth 17. With the bevel teeth 17, the coal can be crushed easier and more thoroughly. One end of the rotatable shaft 10 is connected with a fan blade 12, an outer surface of the rotatable shaft 10 is provided with a driven gear 11, an outer surface of the rotating shaft 7 is provided with a driving gear 9, and the bottom of the fixed rod 13 is provided with a brush strip 14.
[0032] Referring to FIG. 1, in the above embodiment, the driving gear 9 is meshed with the driven gear 11, and a diameter of the driving gear 9 is larger than a diameter of the driven gear 11. The driving gear 9 can drive the driven gear 11 to rotate, and the driven gear 11 can rotate quickly when the driving gear 9 rotates.
[0033] Referring to FIG. 1 and FIG. 3, in the above embodiments, the brush strip 14 is made of nylon, and the bottom of the brush strip 14 is in contact with an outer surface of the first anti-wear pad 15 and an outer surface of the second anti-wear pad 16. The first anti-wear pad 15 and the second anti-wear pad 16 are always in contact with the brush strip 14 when the grinding roller rotates, and the brush strip 14 can brush off sticky powder.
[0034] Referring to FIG. 1, FIG. 2 and FIG. 4, in the above embodiments, multiple groups of first anti-wear pads 15 and multiple groups of second anti-wear pads 16 are provided. The -6-
first anti-wear pads 15 and the second anti-wear pads 16 are made of ceramic-reinforced metal matrix composites, thus the strength of the anti-wear pads is enhanced, so that the first anti-wear pad 15 and the second anti-wear pad 16 are more wear-resistant and more practical.
[0035] The implementation principle of this embodiment is as follows. In the working process, when the coal powder with different particle sizes needs to be produced, the staff rotates the screw rod 2, and the screw rod 2 rotates to drive the threaded sleeve 22 to move, so that the connecting rod 4 moves under the cooperation of the connecting shaft 5, the distance between the grinding roller and the grinding bowl can be adjusted, and thus the power with different particle sizes can be produced. The rotating shaft 7 rotates during the grinding, so that the driving gear 9 drives the driven gear 11 to rotate. The rotation of the driven gear rotates 11 enables the rotatable shaft 10 to drive the fan blade 12 to rotate, the brush strip 14 can brush off sticky powder, the fan blade 12 generates wind during rotation, and the grinding roller can be cleaned under the cooperation of the fan blades 12 and the brush strip 14. When the first anti-wear pad 15 and the second anti-wear pad 16 are worn, the staff can loosen the bolts 21, so that the first anti-wear pad 15 and the second anti-wear pad 16 can be detached from the rotating roller 8. When the first anti-wear pad 15 and the second anti-wear pad 16 are to be mounted, the staff inserts the insertion block 18 into the insertion groove 19, and then fixes the anti-wear pads to the rotating roller 8 by the bolts 21.
[0036] Although embodiments of the present application have been shown and described, the described embodiments are intended to only explain the present application rather than limit the present application. The specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. After reading this specification, those skilled in the art can make modifications, substitutions and variations to the embodiments as needed without departing from the principles and purposes of the present application. These modifications, substitutions and variations should fall within the protection scope of the claims of the present application. -7-

Claims (8)

1. A detachable ceramic composite metal matrix grinding roller of a medium-speed coal mill, comprising a housing (1), wherein an inner wall of the housing (1) is connected with a connecting rod (4) via a connecting shaft (5), a screw rod (2) is mounted on one side of the housing (1), a threaded sleeve (22) is sleeved on an outer surface of the screw rod (2), one end of the connecting rod (4) is connected with a mounting block (6), one side of the mounting block (6) is provided with a fixed rod (13), a rotatable shaft (10) and a rotating shaft (7), a rotating roller (8) is mounted at one end of the rotating shaft (7), an outer surface of the rotating roller (8) is provided with a first anti-wear pad (15) and a second anti-wear pad (16), one end of the rotatable shaft (10) is connected with a fan blade (12), an outer surface of the rotatable shaft (10) is provided with a driven gear (11), an outer surface of the rotating shaft (7) is provided with a driving gear (9), and the bottom of the fixed rod (13) is provided with a brush strip (14).
2. The detachable ceramic composite metal matrix grinding roller of the medium-speed coal mill according to claim 1, wherein one end of the screw rod (2) is provided with a knob (3), and an outer surface of the knob (3) is provided with anti-slip stripes.
3. The detachable ceramic composite metal matrix grinding roller of the medium-speed coal mill according to claim 1, wherein the driving gear (9) is meshed with the driven gear (11), and a diameter of the driving gear (9) is larger than a diameter of the driven gear (11).
4. The detachable ceramic composite metal matrix grinding roller of the medium-speed coal mill according to claim 1, wherein a sink (20) is defined on one side of the first anti-wear pad (15) and a sink (20) is defined one side of the second anti-wear pad (16), and a bolt (21) is provided inside the sink (20).
5. The detachable ceramic composite metal matrix grinding roller of the medium-speed -8-
coal mill according to claim 1, wherein an insertion groove (19) 1s defined on one side of the first anti-wear pad (15), an insertion block (18) is provided on one side of the second anti-wear pad (16), and the insertion block (18) is matched with the insertion groove (19).
6. The detachable ceramic composite metal matrix grinding roller of the medium-speed coal mill according to claim 1, wherein an outer surface of the first anti-wear pad (15) and an outer surface of the second anti-wear pad (16) are provided with bevel teeth (17).
7. The detachable ceramic composite metal matrix grinding roller of the medium-speed coal mill according to claim 1, wherein the brush strip (14) is made of nylon, and the bottom of the brush strip (14) is in contact with an outer surface of the first anti-wear pad (15) and an outer surface of the second anti-wear pad (16).
8. The detachable ceramic composite metal matrix grinding roller of the medium-speed coal mill according to claim 1, wherein the number of the first anti-wear pad (15) is greater than one, the number of the second anti-wear pad (16) is greater than one, the first anti-wear pad (15) and the second anti-wear pad (16) are made of ceramic-reinforced metal matrix composites.
-9.
LU503759A 2022-06-23 2023-03-29 Detachable ceramic composite metal matrix grinding roller of medium-speed coal mill LU503759B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210717976.5A CN115155743A (en) 2022-06-23 2022-06-23 Detachable ceramic composite metal base medium speed pulverizer grinding roller

Publications (1)

Publication Number Publication Date
LU503759B1 true LU503759B1 (en) 2024-01-09

Family

ID=83486508

Family Applications (1)

Application Number Title Priority Date Filing Date
LU503759A LU503759B1 (en) 2022-06-23 2023-03-29 Detachable ceramic composite metal matrix grinding roller of medium-speed coal mill

Country Status (2)

Country Link
CN (1) CN115155743A (en)
LU (1) LU503759B1 (en)

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Publication number Publication date
CN115155743A (en) 2022-10-11

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