CN109304588B - Method for replacing and installing split large gear of ball mill - Google Patents
Method for replacing and installing split large gear of ball mill Download PDFInfo
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- CN109304588B CN109304588B CN201811075637.1A CN201811075637A CN109304588B CN 109304588 B CN109304588 B CN 109304588B CN 201811075637 A CN201811075637 A CN 201811075637A CN 109304588 B CN109304588 B CN 109304588B
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- 238000000034 method Methods 0.000 title claims abstract description 15
- 244000309464 bull Species 0.000 claims abstract description 54
- 238000009434 installation Methods 0.000 claims abstract description 10
- 230000005484 gravity Effects 0.000 claims abstract description 6
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P19/00—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
- B02C17/18—Details
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Abstract
The invention discloses a method for replacing and installing split bull gears of a ball mill, which comprises the steps of installing a spare upper half bull gear at the position of an old upper half bull gear after the old upper half bull gear is detached and hung by a crane, then rotating the spare upper half bull gear to the lower half part and the old lower half bull gear to the upper half part in a half circle of a slow disc ball mill, detaching and hanging the old lower half bull gear by the crane, installing the spare lower half bull gear above the spare upper half bull gear, and then performing split bull gear alignment to finish replacement and installation operation. The invention avoids the problem of gravity center shift caused by dismantling a half split bull gear in conventional operation, does not need the assistance of a crane when in slow disk, reduces the difficulty of the replacement and installation operation of the split bull gear of the ball mill, increases the safety and reliability of operation, improves the operation efficiency, and can be suitable for the ball mill with larger size specification.
Description
Technical Field
The invention belongs to the technical field of ore machine equipment, and particularly relates to a method for replacing and installing a split large gear of a ball mill.
Background
With the continuous development of the industrialization process of mineral processing, ball mills are becoming larger as key equipment for high-fine grinding of materials, the models of large gears of core transmission parts are increasing, the production method is convenient for processing and transportation, the ball mills are generally designed and installed on the ball mills in an opposite-opening large gear form, and after the equipment runs for a long time, the opposite-opening large gears with the expired life caused by the factors of tooth surface peeling or tooth root breaking need to be repaired and replaced.
The conventional replacement and installation operation method is to disassemble half by half the old split bull gear and then install half by half the spare split bull gear, specifically, a ball mill slow-driving mechanism is used to drive a ball mill pinion to plate two joint faces of the split bull gears to a horizontal plane, the old upper half bull gear is disassembled first, the old lower half bull gear is positioned at the lower half part of a cylinder body, the lower half part has no gear disassembly and installation space due to the existence of equipment installation cement foundation, the lower half bull gear is driven to be coiled upwards along the circumference by a slow disc mechanism, the center of gravity is deviated due to the remaining half bull gear, the slow disc mechanism is not enough to safely coil the lower half bull gear, the lower half bull gear is usually lifted by a steel wire rope of a large crane, the speed control and the lifting speed of the slow disc must be highly connected and consistent during the period, the slow disc mechanism is easy to be excessively overloaded and burnt due to slow disc too slow disc mechanism, the slow disc is too fast, so that the load of the crane is easily increased and even the crane is overloaded, and meanwhile, the large gear is easily disengaged from the small gear along the circumferential direction along with inertia when the hoisting is too fast, particularly when the hoisting is close to a disassembly horizontal plane, so that the crane is impacted without control; in the process of mounting the spare split bull gear, the spare upper half bull gear is lifted by a crane to be mounted and fastened with the cylinder, the bull gear is meshed with the pinion in a mode of slowly translating to one side of the slow disc mechanism and dropping the lifting hook, the slow disc and the crane are matched to be arranged on the lower half part in the same mode, and then the subsequent half gear mounting operation is carried out. Therefore, the operation method has the advantages of high operation difficulty, high safety risk and low efficiency, and is more obvious for ball mills with larger size specifications.
Disclosure of Invention
The invention aims to solve the technical problems in the prior art and provides a method for replacing and installing a split large gear of a ball mill, which has low operation difficulty, good operation safety and reliability and high operation efficiency.
In order to achieve the purpose, the invention adopts the following technical scheme: a method for replacing and installing a split large gear of a ball mill comprises the following steps:
A. the small gear is driven to rotate by the slow driving mechanism, the small gear is meshed with an old split large gear on the ball mill to drive the split large gear to rotate until two split joint surfaces of the split large gear are positioned on a horizontal plane, and the split large gear is divided into an old upper half large gear and an old lower half large gear at the moment, so that the gravity center balance of the ball mill is ensured;
B. detaching the split joint surfaces at the split joint surfaces to connect the fastening bolts and the locking pins;
C. the old upper half bull gear and a cylinder body connecting fastening bolt of the cylinder body part are disassembled, and the old upper half bull gear is disassembled and hung by a crane;
D. hoisting the spare upper half gearwheel by using a crane and pretightening and fixedly connecting and installing the spare upper half gearwheel and the barrel body part by using a barrel connecting and fastening bolt;
E. rotating the spare upper half large gear to the lower half and the old lower half large gear to the upper half in a half circle of the slow disc ball mill, detaching the old lower half large gear and a cylinder body connecting fastening bolt of the cylinder body part, and detaching and hanging the old lower half large gear by using a crane;
F. hoisting the spare lower half large gear by using a crane and pre-tightening and fixedly connecting and installing the spare lower half large gear and the cylinder body part by using a cylinder body connecting and fastening bolt;
G. connecting a fastening bolt and a locking pin on a split joint surface to connect a spare upper half big gear and a spare lower half big gear on the split joint surface;
H. taking the circumferential surface of the cylinder body as a reference, selecting 8-16 points on the circumferential clearance surface of the cylinder body and the split bull gear to measure the radial runout amount, utilizing a radial jackscrew to radially align the replaced split bull gear, and controlling the radial runout amount of the split bull gear within 0-0.35mm so as to ensure that technical parameters meet the operation requirements;
I. and (8) fastening the cylinder connecting and fastening bolt in the step D, F to finish the replacement and installation operation.
Further, when the spare upper half bull gear needs to be turned over in the step D, namely the upper half bull gear is turned over by 180 degrees forwards and backwards, the spare upper half bull gear is connected with the cylinder body in a pre-tightening and fixing mode through small bolts with enough strength, and the small bolts are replaced to original cylinder body connecting and fastening bolts one by one when the open bull gear is found in the step H.
Further, when the standby lower half large gear needs to be turned over for use in the step F, namely the lower half large gear is turned over by 180 degrees forwards and backwards, the standby lower half large gear is pre-tightened and fixedly connected with the cylinder part by using small bolts with enough strength, all the small bolts for connecting and fastening the standby lower half large gear are loosened when the split large gear is found in the step H, the standby lower half large gear is in a free state, and a space is reserved for mounting and positioning the standby upper half large gear.
Compared with the prior art, the invention has the following beneficial effects: the invention relates to a method for replacing and installing a split gearwheel of a ball mill, which comprises the steps of dismounting and hanging an old upper half gearwheel by a crane, installing a spare upper half gearwheel at the position of the old upper half gearwheel, then slowly coiling a half-circle ball mill, rotating the spare upper half gearwheel to the lower half, rotating the old lower half gearwheel to the upper half, dismounting and hanging the old lower half gearwheel by the crane, installing the spare lower half gearwheel above the spare upper half gearwheel, and then performing split gearwheel alignment to complete replacement and installation operation. The invention avoids the problem of gravity center shift caused by dismantling a half split bull gear in conventional operation, does not need the assistance of a crane when in slow disk, reduces the difficulty of the replacement and installation operation of the split bull gear of the ball mill, increases the safety and reliability of operation, improves the operation efficiency, and can be suitable for the ball mill with larger size specification.
Drawings
FIG. 1 is a schematic diagram of the present invention.
The reference numerals of the present invention have the following meanings: 1. a lower half large gear; 2. the split joint surfaces are connected with fastening bolts; 3. the upper half gearwheel; 4. the cylinder is connected with a fastening bolt; 5. radially jacking a screw; 6. a barrel portion; 8. a pinion gear.
Detailed Description
The invention is further described with reference to the following figures and specific examples.
As shown in fig. 1, a method for replacing and installing a split bull gear of a ball mill comprises the following steps:
A. the small gear 8 is driven to rotate by the slow driving mechanism, the small gear 8 is meshed with an old split large gear on the ball mill to drive the split large gear to rotate until two split joint surfaces of the split large gear are positioned on a horizontal plane, and at the moment, the split large gear is divided into an old upper half large gear 3 and an old lower half large gear 1, so that the gravity center balance of the ball mill is ensured.
B. And the split joint surface at the split joint surface is removed to connect the fastening bolt 2 and the locking pin.
C. The old upper half bull gear 3 and the cylinder body part 6 are disassembled to connect the fastening bolt 4, and the crane is used for disassembling and hanging the old upper half bull gear 3.
D. The spare upper half gearwheel 3 is hoisted by a crane and the spare upper half gearwheel 3 is pre-tightened and fixedly connected with the cylinder body part 6 by a cylinder body connecting and fastening bolt 4.
E. And (3) rotating the spare upper half large gear 3 to the lower half part and the old lower half large gear 1 to the upper half part in a half circle of the slow disc ball mill, disassembling the old lower half large gear 1 and the cylinder body connecting and fastening bolt 4 of the cylinder body part 6, and disassembling and hanging the old lower half large gear 1 by using a crane.
F. The spare lower half large gear 1 is hoisted by a crane and the spare lower half large gear 1 is pre-tightened and fixedly connected with the cylinder part 6 through the cylinder connecting and fastening bolt 4.
G. The split joint surface is used for connecting the fastening bolt 2 and the locking pin to connect the spare upper half gearwheel 3 and the spare lower half gearwheel 1 at the split joint surface.
H. Taking the circumferential surface of the cylinder part 6 as a reference, selecting 8-16 points on the circumferential clearance surface of the cylinder part 6 and the split bull gear to measure the radial runout amount, utilizing the radial jackscrew 5 to radially align the replaced split bull gear, and controlling the radial runout amount of the split bull gear within 0-0.35mm, thereby ensuring that technical parameters meet the operation requirements.
I. The cylinder connection fastening bolt 4 in step D, F is tightened to complete the replacement and installation work.
In addition, when the spare upper half bull gear 3 needs to be turned over in the step D, namely the upper half bull gear 3 is turned over by 180 degrees forwards and backwards, the spare upper half bull gear 3 is pre-tightened and fixedly connected with the cylinder part 6 by using a small bolt with enough strength, and the small bolts are replaced into the cylinder connecting and fastening bolt 4 with the original model one by one when the open bull gear is found in the step H. And F, when the standby lower half large gear 1 needs to be turned over for use, namely the lower half large gear 1 is turned 180 degrees forwards and backwards, the standby lower half large gear 1 is pre-tightened and fixedly connected with the barrel part 6 by using a small bolt with enough strength, and when the open large gear is found in the step H, the small bolt for connecting and fastening the standby lower half large gear 1 is completely loosened, so that the standby lower half large gear 1 is in a free state, and a space is reserved for mounting and positioning the standby upper half large gear 3.
Claims (3)
1. A method for replacing and installing a split large gear of a ball mill is characterized by comprising the following steps:
A. the small gear (8) is driven to rotate by the slow driving mechanism, the small gear (8) is meshed with an old split large gear on the ball mill to drive the split large gear to rotate until two split joint surfaces of the split large gear are positioned on a horizontal plane, and the split large gear is divided into an old upper half large gear (3) and an old lower half large gear (1) at the moment, so that the gravity center balance of the ball mill is ensured;
B. the split joint surface at the split joint surface is disassembled to connect the fastening bolt (2) and the locking pin;
C. the old upper half large gear (3) and a cylinder body of the cylinder body part (6) are disassembled to connect a fastening bolt (4), and the old upper half large gear (3) is disassembled and hung down by a crane;
D. hoisting the spare upper half gearwheel (3) by using a crane and pretightening and fixedly connecting and installing the spare upper half gearwheel (3) and the barrel body part (6) by a barrel connecting and fastening bolt (4);
E. the half-circle of the slow disc ball mill enables the spare upper half large gear (3) to rotate to the lower half part, the old lower half large gear (1) rotates to the upper half part, the old lower half large gear (1) and a cylinder body part (6) are disassembled to connect the fastening bolt (4), and the old lower half large gear (1) is disassembled and hung by a crane;
F. hoisting the standby lower half large gear (1) by using a crane and pretightening and fixedly connecting and installing the standby lower half large gear (1) and the barrel body part (6) by using a barrel connecting and fastening bolt (4);
G. a split joint surface is used for connecting a fastening bolt (2) and a locking pin to connect a spare upper half big gear (3) and a spare lower half big gear (1) at the split joint surface;
H. taking the circumferential surface of the cylinder body part (6) as a reference, selecting 8-16 points on the circumferential clearance surface of the cylinder body part (6) and the split bull gear to measure the radial runout amount, utilizing a radial jackscrew (5) to radially align the replaced split bull gear, and controlling the radial runout amount of the split bull gear within 0-0.35mm so as to ensure that technical parameters meet the operation requirements;
I. and (4) fastening the cylinder connecting and fastening bolt (4) in the step D, F to finish the replacement and installation operation.
2. The method for replacing and installing the split bull gear of the ball mill as claimed in claim 1, wherein: and D, when the spare upper half bull gear (3) needs to be turned over for use, namely the upper half bull gear (3) is turned over by 180 degrees forwards and backwards, the spare upper half bull gear (3) is pre-tightened and fixedly connected with the cylinder body part (6) by using a small-size bolt with enough strength, and the small-size bolt is replaced into the original cylinder body connecting and fastening bolt (4) one by one when the open bull gear is found in the step H.
3. The method for replacing and installing the split bull gear of the ball mill as claimed in claim 1, wherein: and F, when the standby lower half large gear (1) needs to be turned over for use, namely the lower half large gear (1) is turned over by 180 degrees forwards and backwards, the standby lower half large gear (1) is pre-tightened and fixedly connected with the barrel part (6) by using a small bolt with enough strength, when the split large gear is found out in the step H, the small bolt for connecting and fastening the standby lower half large gear (1) is completely loosened, the standby lower half large gear (1) is in a free state, and a space is reserved for mounting and positioning the standby upper half large gear (3).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811075637.1A CN109304588B (en) | 2018-09-14 | 2018-09-14 | Method for replacing and installing split large gear of ball mill |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811075637.1A CN109304588B (en) | 2018-09-14 | 2018-09-14 | Method for replacing and installing split large gear of ball mill |
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| Publication Number | Publication Date |
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| CN109304588A CN109304588A (en) | 2019-02-05 |
| CN109304588B true CN109304588B (en) | 2021-01-29 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113182027B (en) * | 2021-05-08 | 2022-04-15 | 中信重工机械股份有限公司 | Special open gear structure for alumina mill and installation operation method thereof |
| CN117619511B (en) * | 2024-01-25 | 2024-04-19 | 合肥华运机械制造有限公司 | Sand mill |
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| CN1921959A (en) * | 2004-02-18 | 2007-02-28 | Sms迪马格股份公司 | Method and device for exchanging sets of rolls in rolling frames of a rolling mill |
| CN102031320A (en) * | 2010-09-20 | 2011-04-27 | 中冶天工集团有限公司 | Method for replacing blast furnace shell |
| CN104596299A (en) * | 2015-02-05 | 2015-05-06 | 安徽芜湖海螺建筑安装工程有限责任公司 | Inner tube hanging sheet replacement construction method for preheater cyclone of cement clinker production line |
| CN105115294A (en) * | 2015-08-23 | 2015-12-02 | 安徽芜湖海螺建筑安装工程有限责任公司 | Gear ring replacement and kiln body edge turning method for cement clinker rotary kiln |
| CN207155174U (en) * | 2017-08-08 | 2018-03-30 | 泰兴市金城纺机齿轮制造有限公司 | A kind of gear of textile machine processing grinds wheel replacing device with gear grinding machines |
-
2018
- 2018-09-14 CN CN201811075637.1A patent/CN109304588B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5988222A (en) * | 1982-11-10 | 1984-05-22 | Nissan Motor Co Ltd | Jig exchanger |
| CN1921959A (en) * | 2004-02-18 | 2007-02-28 | Sms迪马格股份公司 | Method and device for exchanging sets of rolls in rolling frames of a rolling mill |
| CN102031320A (en) * | 2010-09-20 | 2011-04-27 | 中冶天工集团有限公司 | Method for replacing blast furnace shell |
| CN104596299A (en) * | 2015-02-05 | 2015-05-06 | 安徽芜湖海螺建筑安装工程有限责任公司 | Inner tube hanging sheet replacement construction method for preheater cyclone of cement clinker production line |
| CN105115294A (en) * | 2015-08-23 | 2015-12-02 | 安徽芜湖海螺建筑安装工程有限责任公司 | Gear ring replacement and kiln body edge turning method for cement clinker rotary kiln |
| CN207155174U (en) * | 2017-08-08 | 2018-03-30 | 泰兴市金城纺机齿轮制造有限公司 | A kind of gear of textile machine processing grinds wheel replacing device with gear grinding machines |
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| CN109304588A (en) | 2019-02-05 |
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Effective date of registration: 20240206 Address after: 737100 No. 2 Lanzhou Road, Beijing Road Street, Jinchuan District, Jinchang City, Gansu Province Patentee after: Jinchuan Group Nickel Cobalt Co.,Ltd. Country or region after: China Address before: 737103 No. 98, Jinchuan Road, Jinchang, Gansu Patentee before: JINCHUAN GROUP Co.,Ltd. Country or region before: China |