CN113564299A - Method for rapidly replacing converter bearing on line - Google Patents
Method for rapidly replacing converter bearing on line Download PDFInfo
- Publication number
- CN113564299A CN113564299A CN202110730133.4A CN202110730133A CN113564299A CN 113564299 A CN113564299 A CN 113564299A CN 202110730133 A CN202110730133 A CN 202110730133A CN 113564299 A CN113564299 A CN 113564299A
- Authority
- CN
- China
- Prior art keywords
- converter
- bearing
- jacks
- tilting mechanism
- total weight
- Prior art date
- Legal status (The legal status 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 status listed.)
- Pending
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
- C21C5/42—Constructional features of converters
- C21C5/46—Details or accessories
- C21C5/4633—Supporting means
- C21C5/464—Trunnion bearings
Abstract
The invention provides a method for quickly replacing a converter bearing on line, which is characterized by comprising the following steps: 1) selecting a jack and a support column with the total jacking weight being 2.5-3.0 times of the total weight of the converter as a jacking assembly; 2) taking the central axis of the converter as a center, symmetrically distributing support columns between the converter and the ground, arranging jacks at the tops of the support columns, and arranging the jacks below the tilting mechanism of the converter; 3) the converter bearing adopts a split bearing; 4) removing the upper cover of the bearing seat; 5) the converter is integrally lifted by 300-400 mm, and the bearing is separated from the bearing seat; 6) replacing a new split bearing, and controlling the assembling clearance to be 0.01-0.014 mm; 7) operating the jack to synchronously descend by 300-400 mm, and covering an upper cover of the bearing seat; (8) and (4) dismantling the jack and the support column, and fixing the converter tilting mechanism on the base, so that the production of the converter can be recovered. The whole replacing process is time-saving and labor-saving.
Description
Technical Field
The invention relates to a method, in particular to a method for rapidly replacing a converter bearing on line, belonging to the technical field of steel smelting.
Background
The converter is the main equipment for steel making, and occupies an important position in the steel making process, and once the converter fails, the converter directly influences the steel making production. After the converter operates for a period of time, the consumable parts need to be repaired and replaced, and the consumable parts generally do not comprise trunnion bearings, so that the trunnion bearings are easy to damage in the period of non-furnace service maintenance. The converter body, the trunnion bearing upper cover and the converter tilting device are required to be sequentially dismantled before the existing trunnion bearing is replaced, then a backing ring outside the converter is lifted, and then the tilting device, the bearing upper cover and the converter shell are sequentially installed again after a new bearing is replaced. The complicated disassembling and assembling method can be completed in at least 7 days, the construction task amount and difficulty are large, the converter is easy to be damaged in the construction process, the turnover rate of the converter is reduced, and the normal production is influenced. There is therefore a need for improvements in the prior art.
Disclosure of Invention
The invention provides a method for quickly replacing a converter bearing on line, which aims to solve the problems of long construction period, large construction task amount, high difficulty, easy damage to a converter in a disassembly and assembly process and the like in the replacement of the trunnion bearing of the existing converter, so that the maintenance and replacement efficiency of the bearing is improved, the construction difficulty is reduced, and the damage to the converter is avoided.
The invention is completed by the following technical scheme: a method for rapidly replacing a converter bearing on line is characterized by comprising the following steps:
(1) adding the mass of a converter body, an apron plate, a backing ring, a tilting mechanism and a lining brick to obtain the total weight of the converter, and selecting four jacks with the same specification and four support columns as jacking components, wherein the jacking total weight of the jacks is 2.5-3.0 times of the total weight of the converter;
(2) on a ground ladle conveying track positioned below the converter, taking the central axis of the converter as the center, symmetrically distributing the first, second, third and fourth support columns in the step (1) between a converter backing ring and the ground ladle conveying track, arranging corresponding first to fourth jacks at the top of each support column, and arranging a fifth jack with the weight being the same as the total weight of the converter between the lower part of a converter tilting mechanism and a base;
(3) the bearings of the driving end and the moving end of the converter are both split bearings formed by combining an upper semicircular bearing and a lower semicircular bearing;
(4) sequentially removing upper covers of the bearing seats of the driving end and the moving end;
(5) operating the five jacks to synchronously lift, so that the converter, the backing ring, the tilting mechanism, the rotating shaft and the whole body are lifted by 300-400 mm, and the bearings at the driving end and the moving end of the converter are completely separated from the base of the bearing seat;
(6) dismantling the damaged split bearing, replacing a new split bearing, filling lithium-based lubricating grease, and controlling the assembly gap to be 0.01-0.014 mm;
(7) operating five hydraulic jacks to synchronously descend by 300-400 mm, placing the split type bearing on the corresponding bearing seat base, and covering the upper cover of the bearing seat;
(8) and (4) detaching the five jacks and the four support columns, and fixing the lower part of the converter tilting mechanism on the base, so that the production of the converter can be recovered.
The support column is made of H-shaped steel with the diameter larger than or equal to 400 mm.
The jack is a conventional hydraulic jack.
The split bearing is a conventional product.
The invention has the following advantages and effects: by adopting the technical scheme, after the converter, the backing ring and the tilting mechanism are integrally jacked up by the jack, the bearings at the driving end and the moving end of the converter are completely separated from the base of the bearing seat, and the damaged split bearing can be removed and replaced by a new split bearing. The whole replacement process is time-saving and labor-saving, the overhaul period is shortened from original more than 7 days to within 2 days, and meanwhile, the overhaul cost is saved by about 60 percent compared with the original overhaul cost. In addition, the maintenance and replacement process does not cause any damage to the converter. Not only ensures the normal production, but also saves the production and maintenance cost for enterprises.
Drawings
FIG. 1 is a block diagram of the present invention.
In the figure, 1 is a base, 2 is a fifth jack below the tilting mechanism, 3 is the tilting mechanism, 4 is a driving end split type bearing, 5 is a driving end bearing seat upper cover, 6 is a backing ring, 7 is a converter, 8 is a moving end bearing seat upper cover, 9 is a moving end split type bearing, 10 is a jack, 11 is a support column, and 12 is a ladle conveying track.
Detailed Description
Example 1
The invention provides a method for quickly replacing a converter bearing on line, which is characterized by comprising the following steps:
(1) adding the mass of a converter body 7, an apron plate, a trunnion ring 6, a tilting mechanism 3 and a lining brick of the converter to obtain the total weight of the converter, selecting four jacks 10 with the same specification and four support columns 11 with the jacking total weight 2.5 times of the total weight of the converter as jacking components, wherein each support column 11 is H-shaped steel with the diameter of 500 mm;
(2) on a ground ladle conveying track 12 positioned below a converter 7, taking the central axis of the converter 7 as the center, symmetrically distributing a first support column 11, a second support column 11, a third support column 11 and a fourth support column 11 in the step (1) between a backing ring 6 of the converter 7 and the ground ladle conveying track 12, arranging corresponding first to fourth jacks 10 at the top of each support column 11, and arranging a fifth jack 2 with the weight being the same as the total weight of the converter between the lower part of a tilting mechanism 3 of the converter 7 and a base 1;
(3) the bearings at the driving end and the moving end of the converter 7 are both split bearings 4 and 9 which are combined by an upper semicircular bearing and a lower semicircular bearing;
(4) sequentially removing upper covers 5 and 8 of the bearing seats at the driving end and the moving end;
(5) operating the five jacks 10 and 2 to synchronously jack up, so that the converter 7, the backing ring 6, the tilting mechanism 3, the rotating shaft and the whole body are lifted by 300mm, and the bearings 4 and 9 at the driving end and the moving end of the converter 7 are completely separated from the base of the bearing seat;
(6) dismantling the damaged split bearings 4 and 9, replacing the new split bearing, filling lithium-based lubricating grease, and controlling the assembly gap to be 0.01 mm;
(7) operating five hydraulic jacks 10 and 2 to synchronously descend by 300mm, so that the split bearings 4 and 9 are placed on the corresponding bearing seat bases, and covering the upper covers 5 and 8 of the bearing seats;
(8) and (3) dismantling the five jacks 10 and 2 and the four support columns 11, and fixing the lower part of the tilting mechanism 3 of the converter 7 on the base 1, so that the production of the converter can be recovered.
Example 2
The invention provides a method for quickly replacing a converter bearing on line, which is characterized by comprising the following steps:
(1) adding the mass of a converter body 7, an apron plate, a trunnion ring 6, a tilting mechanism 3 and a lining brick of the converter to obtain the total weight of the converter, selecting four jacks 10 with the same specification and the jacking total weight of which is 3 times of the total weight of the converter and four support columns 11 as jacking components, wherein each support column 11 is H-shaped steel with the diameter of 400 mm;
(2) on a ground ladle conveying track 12 positioned below a converter 7, taking the central axis of the converter 7 as the center, symmetrically distributing a first support column 11, a second support column 11, a third support column 11 and a fourth support column 11 in the step (1) between a backing ring 6 of the converter 7 and the ground ladle conveying track 12, arranging corresponding first to fourth jacks 10 at the top of each support column 11, and arranging a fifth jack 2 with the weight being the same as the total weight of the converter between the lower part of a tilting mechanism 3 of the converter 7 and a base 1;
(3) the bearings at the driving end and the moving end of the converter 7 are both split bearings 4 and 9 which are combined by an upper semicircular bearing and a lower semicircular bearing;
(4) sequentially removing upper covers 5 and 8 of the bearing seats at the driving end and the moving end;
(5) operating the five jacks 10 and 2 to synchronously jack up, so that the converter 7, the backing ring 6, the tilting mechanism 3, the rotating shaft and the whole body rise by 400mm, and the bearings 4 and 9 at the driving end and the moving end of the converter 7 are completely separated from the base of the bearing seat;
(6) dismantling the damaged split bearings 4 and 9, replacing the new split bearing, filling lithium-based lubricating grease, and controlling the assembly gap to be 0.014 mm;
(7) operating five hydraulic jacks 10 and 2 to synchronously descend for 400mm, so that the split bearings 4 and 9 are placed on the corresponding bearing seat bases, and covering the upper covers 5 and 8 of the bearing seats;
(8) and (3) dismantling the five jacks 10 and 2 and the four support columns 11, and fixing the lower part of the tilting mechanism 3 of the converter 7 on the base 1, so that the production of the converter can be recovered.
Claims (2)
1. A method for rapidly replacing a converter bearing on line is characterized by comprising the following steps:
(1) adding the mass of a converter body, an apron plate, a backing ring, a tilting mechanism and a lining brick to obtain the total weight of the converter, and selecting four jacks with the same specification and four support columns as jacking components, wherein the jacking total weight of the jacks is 2.5-3.0 times of the total weight of the converter;
(2) on a ground ladle conveying track positioned below the converter, taking the central axis of the converter as the center, symmetrically distributing the first, second, third and fourth support columns in the step (1) between a converter backing ring and the ground ladle conveying track, arranging corresponding first to fourth jacks at the top of each support column, and arranging a fifth jack with the weight being the same as the total weight of the converter between the lower part of a converter tilting mechanism and a base;
(3) the bearings of the driving end and the moving end of the converter are both split bearings formed by combining an upper semicircular bearing and a lower semicircular bearing;
(4) sequentially removing upper covers of the bearing seats of the driving end and the moving end;
(5) operating the five jacks to synchronously lift, so that the converter, the backing ring, the tilting mechanism, the rotating shaft and the whole body are lifted by 300-400 mm, and the bearings at the driving end and the moving end of the converter are completely separated from the base of the bearing seat;
(6) dismantling the damaged split bearing, replacing a new split bearing, filling lithium-based lubricating grease, and controlling the assembly gap to be 0.01-0.014 mm;
(7) operating five hydraulic jacks to synchronously descend by 300-400 mm, placing the split type bearing on the corresponding bearing seat base, and covering the upper cover of the bearing seat;
(8) and (4) detaching the five jacks and the four support columns, and fixing the lower part of the converter tilting mechanism on the base, so that the production of the converter can be recovered.
2. The method of claim 1, wherein the support column is made of H-shaped steel with a diameter of 400mm or more.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110730133.4A CN113564299A (en) | 2021-06-29 | 2021-06-29 | Method for rapidly replacing converter bearing on line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110730133.4A CN113564299A (en) | 2021-06-29 | 2021-06-29 | Method for rapidly replacing converter bearing on line |
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| Publication Number | Publication Date |
|---|---|
| CN113564299A true CN113564299A (en) | 2021-10-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110730133.4A Pending CN113564299A (en) | 2021-06-29 | 2021-06-29 | Method for rapidly replacing converter bearing on line |
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| CN (1) | CN113564299A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106011369A (en) * | 2016-08-04 | 2016-10-12 | 攀钢集团工程技术有限公司 | Converter trunnion bearing replacing method |
| CN112119228A (en) * | 2018-02-27 | 2020-12-22 | 库珀滚动轴承有限公司 | Double-row spherical rolling bearing |
-
2021
- 2021-06-29 CN CN202110730133.4A patent/CN113564299A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106011369A (en) * | 2016-08-04 | 2016-10-12 | 攀钢集团工程技术有限公司 | Converter trunnion bearing replacing method |
| CN112119228A (en) * | 2018-02-27 | 2020-12-22 | 库珀滚动轴承有限公司 | Double-row spherical rolling bearing |
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Application publication date: 20211029 |
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| RJ01 | Rejection of invention patent application after publication |