CN111992981A - Disassembling method of bearing inner ring - Google Patents
Disassembling method of bearing inner ring Download PDFInfo
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- CN111992981A CN111992981A CN202010857986.XA CN202010857986A CN111992981A CN 111992981 A CN111992981 A CN 111992981A CN 202010857986 A CN202010857986 A CN 202010857986A CN 111992981 A CN111992981 A CN 111992981A
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- bearing
- inner ring
- disassembling
- bearing inner
- heating coil
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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
- B23P11/00—Connecting or disconnecting metal parts or objects by metal-working techniques not otherwise provided for
- B23P11/02—Connecting or disconnecting metal parts or objects by metal-working techniques not otherwise provided for by first expanding and then shrinking or vice versa, e.g. by using pressure fluids; by making force fits
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Automatic Assembly (AREA)
- Mounting Of Bearings Or Others (AREA)
- Rolling Contact Bearings (AREA)
Abstract
The invention relates to a method for disassembling a bearing inner ring, which belongs to the technical field related to bearing installation and comprises the following processes: the method comprises the following steps: firstly, the outer ring of the bearing, the roller and the retainer inside the bearing are disassembled: step two: winding the heating coil on the outer surface of the inner ring, and heating the bearing inner ring through the heating coil to expand the diameter of the bearing inner ring: step three: the outer surface of the heating coil is wound with a sling to tighten the inner ring of the bearing, and the inner ring of the bearing is taken down by dragging the sling. The method solves the problem that heat cannot be transferred to the inner ring when the outer ring is simply heated, and meanwhile, the bearing inner ring is uniformly heated and heated, and has assembly reversibility.
Description
Technical Field
The disclosure belongs to the technical field of bearing installation, and particularly relates to a method for disassembling a bearing inner ring.
Background
The statements herein merely provide background related to the present disclosure and may not necessarily constitute prior art.
In a wind generating set, if the shaft diameter of a main shaft and a bearing are in interference fit, the bearing is generally heated by hot-charging. The bearing is sleeved on the shaft shoulder of the main shaft by heating to a set temperature to increase the inner diameter of the bearing and generate a gap between the bearing and the main shaft.
During the assembly and falling process of the self-aligning roller bearing, the temperature of the inner diameter of the bearing is rapidly transferred to the main shaft by contacting with the main shaft, namely, the temperature is reduced, and the contraction of the inner diameter of the bearing is reduced. This requires that the bearings be controlled within 10 minutes from completion of heating to assembly in place.
The inventor finds that: the bearing is influenced by various factors such as environment temperature, operating personnel, heating temperature, shrinkage of the inner diameter of the bearing and the like, the bearing assembly is inevitably influenced, and the problem that the bearing is not smoothly dropped onto a shaft shoulder and is tightly clamped with the shaft diameter of the main shaft occurs. Because the fit relation between the shaft diameter of the main shaft and the bearing is interference, the bearing cannot be directly taken out at normal temperature, and the inner diameter of the bearing is heated to be increased by a heating method. The self-aligning roller bearing is of an internal and external integral type and is limited by a structure, heat is transferred to an inner ring through a pure heating outer ring, the effect is very little, the heating is uneven, the temperature is not controllable, and a gap cannot be generated between the self-aligning roller bearing and a main shaft to take out the bearing.
Disclosure of Invention
Aiming at the technical problems in the prior art, the disclosure provides a method for disassembling a bearing inner ring, which solves the problem that heat cannot be transferred to the inner ring when an outer ring is simply heated, and simultaneously, the bearing inner ring is heated uniformly and has assembly reversibility.
At least one embodiment of the present disclosure provides a method for disassembling a bearing inner race, including the following steps:
the method comprises the following steps: firstly, disassembling an outer ring of a bearing, a roller and a retainer in the bearing;
step two: winding a heating coil on the outer surface of the inner ring, and heating the bearing inner ring through the heating coil to expand the diameter of the bearing inner ring;
step three: the outer surface of the heating coil is wound with a sling to tighten the inner ring of the bearing, and the inner ring of the bearing is taken down by dragging the sling.
Further, in the second step, firstly, a hard paper shell is wrapped on the outer surface of the bearing inner ring, and then the heating coil is uniformly and neatly wound on the surface of the hard paper shell.
Further, a layer of insulating and high-temperature-resistant adhesive tape is wound on the outer surface of the hard paper shell.
Further, a layer of insulating and high-temperature resistant adhesive tape is wound on the outer surface of the heating coil.
Furthermore, in the second step, two ends of the heating coil are connected with a heater, and the heating speed of the coil is controlled by adjusting the current in the heater, so that the temperature rising speed of the bearing inner ring is greater than the temperature rising speed of the main shaft.
Further, in the second step, in the heating process, the temperature of the bearing inner ring and the surface adjacent to the main shaft is detected in real time, and the clearance between the bearing inner ring and the surface adjacent to the main shaft is measured by using a feeler gauge.
Further, in the third step, at least two annular hanging belts are symmetrically wound on the outer surface of the heating coil, and the bearing inner ring is removed through the tightening force between the hanging belts.
Furthermore, the hanging strip is connected with a travelling crane, and the bearing inner ring is taken out by controlling the hanging strip through the travelling crane.
Further, the step one specific process is as follows: a crowbar is plugged into the oil injection hole of the bearing outer ring to pry and incline the bearing outer ring, so that the inner roller is exposed; the bearing lifting tool is hooped on the outer ring of the bearing, and the rollers are taken out one by one.
At least one embodiment of the present disclosure further provides a bearing inner race dismantling method based on any one of the above, characterized in that: the self-aligning roller bearing dismounting device is used for dismounting a self-aligning roller bearing in a wind generating set.
The beneficial effects of this disclosure are as follows:
(1) the bearing inner ring is heated in a coil winding mode, so that the bearing inner ring is better heated and expanded, and the problems that the heating quality and the expansion efficiency of the bearing inner ring are influenced due to low heat conduction efficiency and nonuniform heating of the bearing are solved; while ensuring the accuracy of the heating.
(2) According to the bearing inner ring dismounting method, after the heating coil heats the bearing inner ring, the sling is wound on the outer surface of the coil, the bearing inner ring is tightened through the tightening force of the sling, the bearing inner ring is pulled, and the inner ring is taken down by utilizing the tightening force of the sling and the bearing inner ring.
Drawings
The accompanying drawings, which are included to provide a further understanding of the disclosure, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure and are not to limit the disclosure.
Fig. 1 is a structural view of a self-aligning roller bearing provided in an embodiment of the present disclosure;
FIG. 2 is a state diagram of an embodiment of the present disclosure providing a winding of a heating coil around the bearing inner race;
FIG. 3 is a state diagram of a bearing inner race being lifted by an annular sling according to an embodiment of the disclosure.
In the figure: 1-1 parts of bearing outer ring, 1-2 parts of bearing inner ring, 1-3 parts of roller, 1-4 parts of retainer, 1-5 parts of oil injection hole, 2-1 parts of heating coil, 3-1 parts of annular hanging strip.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs.
In the description of the present disclosure, it is to be understood that the terms "upper", "lower", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present disclosure and simplifying the description, and do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present disclosure.
In order to solve the problem that a bearing cannot be taken out due to the fact that a bearing inner ring cannot generate a gap due to nonuniform heating in the process of disassembling a self-aligning roller bearing in the conventional wind generating set, the embodiment of the disclosure provides a method for disassembling a self-aligning roller bearing, which takes a self-aligning roller bearing of 240 and 950 as an example as shown in fig. 1; the self-aligning roller bearing mainly comprises an outer ring, a roller, a retainer and an inner ring, when the bearing is disassembled, the outer ring of the bearing is disassembled, and the step can be carried out by a professional technician of the bearing.
The method comprises the following steps as shown in figures 1-3:
A. and (3) plugging a crowbar into the oil injection hole 1-5 of the bearing outer ring 1-1, and forcibly breaking the outer ring of the crowed bearing to enable the roller in the bearing to leak out.
B. The rollers 1-3 are taken out one by hooping a bearing hanger on a bearing outer ring;
C. and (4) hanging out the bearing outer ring 1-1 and the retainer 1-4, and remaining the bearing inner ring 1-2.
Further, after the outer ring of the bearing is taken out, a heating coil 2-1 is wound on the inner ring of the bearing for induction heating, and the method for heating the inner ring of the bearing by winding induction by using the heating coil 2-1 comprises the following steps:
firstly, a layer of hard paper shell is wound on the inner ring of the bearing, an insulating and high-temperature resistant adhesive tape is wound on the outer surface of the hard paper shell to fix the hard paper shell,
then, the heating coil is evenly and tidily wound on the outer surface of the hard paper shell, meanwhile, an insulating and high-temperature-resistant adhesive tape is wound on the outer surface of the heating coil to fix the heating coil, meanwhile, at least two annular hanging strips 3-1 are symmetrically wound on the outer surface of the heating coil, and a hook of a travelling crane is hung on each hanging strip.
And finally, when the coil is heated to enable a gap to be formed between the inner ring and the main shaft, the lifting of the hook is controlled through a crane, and the bearing inner ring is pulled out of the main shaft by utilizing the tightening force of the hanging strips and the bearing inner ring in the lifting process of the hook.
Specifically, in the embodiment, heaters are connected to two ends of a heating coil for heating, a heating target temperature is set on the heaters, the temperature of the surface of the bearing inner ring and the surface of the adjacent spindle is detected in real time in the heating process, and the gap between the bearing inner ring and the adjacent spindle is measured by using a high-temperature-resistant feeler gauge. When a certain gap is formed between the inner ring of the bearing and the main shaft, the travelling crane is controlled to take out the inner ring of the bearing through the hanging belt by hanging the hanging belt.
The caution of heating by winding the inner ring with the induction coil in this embodiment: the bearing inner ring is of an annular closed structure, and can cut magnetic induction lines to generate alternating current, so that a heating effect is achieved. Because the bearing inner ring also transmits heat to the main shaft when heating, in order to avoid that the temperature difference between the bearing inner ring and the main shaft is too small, the heater can not generate a gap, when in work, the heating speed is controlled by adjusting the current of the heater, the requirement that the temperature rising speed of the bearing inner ring is far greater than that of the main shaft is met, and after multiple times of verification, the requirement that the current is greater than or equal to 50A can be met.
Therefore, the bearing dismounting method provided by the embodiment solves the problem that heat cannot be transferred to the inner ring due to the fact that the outer ring is simply heated, meanwhile, the temperature of the bearing inner ring is uniformly raised due to heating, the bearing inner ring has assembly reversibility, and meanwhile, after the bearing inner ring is heated by the heating coil, the sling is wound on the outer surface of the coil, the bearing inner ring is tightened through tightening force of the sling, the bearing inner ring is dragged, the inner ring is taken down by the tightening force of the sling and the bearing inner ring, and the bearing inner ring cannot be damaged.
Finally, the above embodiments are only intended to illustrate the technical solutions of the present disclosure and not to limit, although the present disclosure has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present disclosure without departing from the spirit and scope of the technical solutions, and all of them should be covered in the claims of the present disclosure.
Although the present disclosure has been described with reference to specific embodiments, it should be understood that the scope of the present disclosure is not limited thereto, and those skilled in the art will appreciate that various modifications and changes can be made without departing from the spirit and scope of the present disclosure.
Claims (10)
1. A method for disassembling a bearing inner ring is characterized in that: the method comprises the following steps:
the method comprises the following steps: firstly, disassembling an outer ring of a bearing, a roller and a retainer in the bearing;
step two: winding a heating coil on the outer surface of the inner ring, and heating the bearing inner ring through the heating coil to expand the diameter of the bearing inner ring;
step three: the outer surface of the heating coil is wound with a sling to tighten the inner ring of the bearing, and the inner ring of the bearing is taken down by dragging the sling.
2. The method for disassembling the bearing inner race of claim 1, wherein: in the second step, firstly, a hard paper shell is wrapped on the outer surface of the bearing inner ring, and then the heating coil is uniformly and neatly wound on the surface of the hard paper shell.
3. The method for disassembling the bearing inner race of claim 2, wherein: and a layer of insulating and high-temperature-resistant adhesive tape is wound on the outer surface of the hard paper shell.
4. The method for disassembling the bearing inner race of claim 2, wherein: and a layer of insulating and high-temperature-resistant adhesive tape is wound on the outer surface of the heating coil.
5. A method for adjusting roller bearing removal as set forth in claim 1 wherein: in the second step, two ends of the heating coil are connected with a heater, and the heating speed of the coil is controlled by adjusting the current in the heater, so that the temperature rising speed of the inner ring of the bearing is larger than the temperature rising speed of the main shaft.
6. The method for disassembling the bearing inner race according to claim 1, wherein: in the second step, in the heating process, the temperature of the bearing inner ring and the surface adjacent to the main shaft is detected in real time, and the clearance between the bearing inner ring and the surface adjacent to the main shaft is measured by using a feeler gauge.
7. The method for disassembling the bearing inner race according to claim 1, wherein:
and in the third step, at least two annular hanging belts are symmetrically wound on the outer surface of the heating coil, and the inner ring of the bearing is taken down through the tightening force between the hanging belts.
8. The method for disassembling an inner race of a bearing according to claim 7, wherein: the hanging strip is connected with the travelling crane, and the bearing inner ring is taken out by controlling the hanging strip through the travelling crane.
9. The method for disassembling the bearing inner race according to claim 1, wherein: the specific process of the step one is as follows: a crowbar is plugged into an oil injection hole on the outer side of the bearing to pry and incline the outer ring of the bearing, so that the inner roller is exposed; the bearing lifting tool is hooped on the outer ring of the bearing, and the rollers are taken out one by one.
10. A method for disassembling a bearing inner race according to any one of claims 1 to 9, wherein: the self-aligning roller bearing dismounting device is used for dismounting a self-aligning roller bearing in a wind generating set.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010857986.XA CN111992981A (en) | 2020-08-24 | 2020-08-24 | Disassembling method of bearing inner ring |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010857986.XA CN111992981A (en) | 2020-08-24 | 2020-08-24 | Disassembling method of bearing inner ring |
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| Publication Number | Publication Date |
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| CN111992981A true CN111992981A (en) | 2020-11-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010857986.XA Pending CN111992981A (en) | 2020-08-24 | 2020-08-24 | Disassembling method of bearing inner ring |
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| CN (1) | CN111992981A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114654182A (en) * | 2022-02-28 | 2022-06-24 | 明阳智慧能源集团股份公司 | Method for replacing bearing tower of semi-direct-drive permanent magnet wind power generator |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11228051A (en) * | 1998-02-10 | 1999-08-24 | Hitachi Building Systems Co Ltd | Method for replacing boss fitted in shaft |
| CN101462221A (en) * | 2007-12-21 | 2009-06-24 | 广东明阳风电技术有限公司 | Method for disassembling self-aligning roller bearing matched with long shaft |
| CN101913053A (en) * | 2010-08-20 | 2010-12-15 | 常州宝隆冶金设备制造有限公司 | Method and device for quickly and simply disassembling bearing inner ring |
| CN103624525A (en) * | 2013-10-28 | 2014-03-12 | 武汉中冶易新科技有限公司 | Disassembling device and method of coiler cylinder |
| CN203887466U (en) * | 2014-04-17 | 2014-10-22 | 郑州国钧电子技术有限公司 | Medium-large bearing thermal installing and detaching device |
| CN204504704U (en) * | 2015-02-13 | 2015-07-29 | 山西省长治经坊煤业有限公司 | A kind of New mechanical couple Shaft drawer |
-
2020
- 2020-08-24 CN CN202010857986.XA patent/CN111992981A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11228051A (en) * | 1998-02-10 | 1999-08-24 | Hitachi Building Systems Co Ltd | Method for replacing boss fitted in shaft |
| CN101462221A (en) * | 2007-12-21 | 2009-06-24 | 广东明阳风电技术有限公司 | Method for disassembling self-aligning roller bearing matched with long shaft |
| CN101913053A (en) * | 2010-08-20 | 2010-12-15 | 常州宝隆冶金设备制造有限公司 | Method and device for quickly and simply disassembling bearing inner ring |
| CN103624525A (en) * | 2013-10-28 | 2014-03-12 | 武汉中冶易新科技有限公司 | Disassembling device and method of coiler cylinder |
| CN203887466U (en) * | 2014-04-17 | 2014-10-22 | 郑州国钧电子技术有限公司 | Medium-large bearing thermal installing and detaching device |
| CN204504704U (en) * | 2015-02-13 | 2015-07-29 | 山西省长治经坊煤业有限公司 | A kind of New mechanical couple Shaft drawer |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114654182A (en) * | 2022-02-28 | 2022-06-24 | 明阳智慧能源集团股份公司 | Method for replacing bearing tower of semi-direct-drive permanent magnet wind power generator |
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Application publication date: 20201127 |
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