CN113618332A - Cold repair method for shafts - Google Patents
Cold repair method for shafts Download PDFInfo
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- CN113618332A CN113618332A CN202110872706.7A CN202110872706A CN113618332A CN 113618332 A CN113618332 A CN 113618332A CN 202110872706 A CN202110872706 A CN 202110872706A CN 113618332 A CN113618332 A CN 113618332A
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- shaft
- welding
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- repair method
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- 238000000034 method Methods 0.000 title claims abstract description 14
- 238000005516 engineering process Methods 0.000 claims abstract description 28
- 238000003466 welding Methods 0.000 claims abstract description 26
- 238000005299 abrasion Methods 0.000 claims abstract description 16
- 239000002131 composite material Substances 0.000 claims abstract description 10
- 229920000642 polymer Polymers 0.000 claims abstract description 10
- 238000005498 polishing Methods 0.000 claims description 10
- 238000004140 cleaning Methods 0.000 claims description 9
- 238000003754 machining Methods 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 5
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 3
- 238000005520 cutting process Methods 0.000 claims description 3
- 239000012535 impurity Substances 0.000 claims description 3
- 230000008901 benefit Effects 0.000 abstract description 7
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 238000010276 construction Methods 0.000 abstract 1
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Classifications
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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
- B23P6/00—Restoring or reconditioning objects
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
Abstract
The invention belongs to the technical field of machinery, and relates to a shaft cold repair method, which adopts a rapid cold repair technology combining a precision cold welding technology and a polymer composite material repair technology, and is a rapid repair technology carried out under the condition without a cold welding girth welding technology; the repair technology can be used for rapidly repairing shaft abrasion, the repair quality can meet the production requirement, the repair construction period is effectively shortened, the repair cost is reduced, and the production benefit is improved.
Description
Technical Field
The invention belongs to the technical field of machinery, and relates to a shaft cold repair method.
Background
The existing shaft repair technology mainly adopts a welding processing repair technology; while some shafts (such as a fan rotor shaft) are long, bending deformation can be caused by conventional welding repair; and the bearing position is returned to a manufacturer for repairing after being worn, so that the period is long and the cost is high. Because the abrasion area is large and long, the abrasion depth reaches 2mm, the existing repair technology cannot ensure that the shaft does not bend and deform, and cannot achieve quick repair.
Disclosure of Invention
In view of the above, the present invention is to provide a method for cold repairing a shaft, which can ensure that the shaft does not bend and deform, highlight the cold repairing technology, and realize quick repairing.
In order to achieve the purpose, the invention provides the following technical scheme: a shaft cold repair method comprises the following steps:
s1, cleaning the wear section of the shaft, polishing the fatigue layer to expose the base material, and dividing the polished wear section into n sections of spiral belts by using a marking pen;
s2, welding the polished shaft by adopting a precise cold welding technology to form a spiral band-shaped body;
s3, after welding, polishing the periphery of the welding position by a straight grinding machine, and cleaning an oxide layer;
s4, after polishing, cutting the axial surface of the wear segment except the spiral band into a net shape by using an angle grinder;
s5, repairing the surface of the abrasion section to be clean without oil stain and impurities, filling the abrasion section with a polymer composite material, and curing the abrasion section;
and S6, machining the wear section of the repaired shaft to an assembly size by adopting a lathe machining technology, and finishing the repair.
Optionally, in the step S1, the number of segments and the width of the helical band are matched with the size of the shaft, and n is greater than or equal to 2.
Optionally, in the step S1, the helical ribbon and the axial direction of the shaft form an included angle of 35 to 45 °.
Optionally, in the step S2, the height of the solder is greater than the nominal dimension height, and a machining allowance is left.
Optionally, in step S5, the surface of the wear segment is cleaned by baking with fire and cleaning with alcohol.
Optionally, in step S5, the filling height of the polymer composite material to the wear segment is greater than the nominal dimension height.
The invention has the beneficial effects that: the invention relates to a shaft cold repair method, which adopts a rapid cold repair technology combining a precision cold welding technology and a polymer composite material repair technology, and is a rapid repair technology carried out under the condition without a cold welding girth welding technology; the shaft can be quickly repaired by adopting the repairing technology, the repairing quality can meet the production requirement, the repairing period is effectively shortened, the repairing cost is reduced, and the production benefit is improved.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention may be realized and attained by the means of the instrumentalities and combinations particularly pointed out hereinafter.
Drawings
For the purposes of promoting a better understanding of the objects, aspects and advantages of the invention, reference will now be made to the following detailed description taken in conjunction with the accompanying drawings in which:
fig. 1 is a schematic structural view of a rotor shaft of a wind turbine in an embodiment of the present invention.
Reference numerals: shaft 1, wearing segment 2, spiral band 3.
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention in a schematic way, and the features in the following embodiments and examples may be combined with each other without conflict.
Wherein the showings are for the purpose of illustrating the invention only and not for the purpose of limiting the same, and in which there is shown by way of illustration only and not in the drawings in which there is no intention to limit the invention thereto; to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar components; in the description of the present invention, it should be understood that if there is an orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "front", "rear", etc., based on the orientation or positional relationship shown in the drawings, it is only for convenience of description and simplification of description, but it is not an indication or suggestion that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes, and are not to be construed as limiting the present invention, and the specific meaning of the terms may be understood by those skilled in the art according to specific situations.
Referring to fig. 1, a shaft cold repair method applied to repair a rotor shaft of a wind turbine includes the following steps:
s1, cleaning and polishing a fatigue layer of a bearing position abrasion section 2 of a fan rotor shaft 1 to expose a base material, dividing the abrasion section 2 after polishing into 6 sections of spiral belts by using a marking pen, setting the spiral belts to form an included angle with the axial direction of the shaft 1, wherein the included angle is 35 degrees, and the width of the spiral belts is about 8 mm;
s2, welding the polished shaft 1 by adopting a precise cold welding technology, surfacing according to 6-segment lines during welding to form a spiral band-shaped body 3, wherein the welding height is greater than the nominal dimension height, and a machining allowance is reserved;
s3, after welding, polishing the periphery of the welding position by a straight grinding machine, and cleaning an oxide layer;
s4, after polishing, cutting the axial surface of the abrasion section 2 except the spiral belt-shaped body 3 into a net shape by using an angle grinder;
s5, cleaning the surface of the abrasion section 2 by baking and alcohol until no oil stain or impurity exists, filling the abrasion section 2 with a polymer composite material, and curing the material until the filling height of the polymer composite material to the abrasion section 2 is greater than the nominal size height;
and S6, machining the wear section 2 of the repaired shaft 1 to an assembly size by adopting a lathe machining technology, and finishing the repair.
In this embodiment, the polymer composite material can be more favorably adhered to the base material by the network structure in step S4.
The invention adopts a rapid cold repair technology combining a precise cold welding technology and a high polymer composite material repair technology, and is a rapid repair technology which is carried out under the condition without a cold welding girth welding technology; by adopting the repairing technology, the shaft 1 position can be rapidly repaired, the repairing quality can meet the production requirement, the repairing period is effectively shortened, the repairing cost is reduced, and the production benefit is improved.
Finally, the above embodiments are only intended to illustrate the technical solutions of the present invention and not to limit the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all of them should be covered by the claims of the present invention.
Claims (6)
1. The shaft cold repair method is characterized by comprising the following steps:
s1, cleaning the wear section of the shaft, polishing the fatigue layer to expose the base material, and dividing the polished wear section into n sections of spiral belts by using a marking pen;
s2, welding the polished shaft by adopting a precise cold welding technology to form a spiral band-shaped body;
s3, after welding, polishing the periphery of the welding position by a straight grinding machine, and cleaning an oxide layer;
s4, after polishing, cutting the axial surface of the wear segment except the spiral band into a net shape by using an angle grinder;
s5, repairing the surface of the abrasion section to be clean without oil stain and impurities, filling the abrasion section with a polymer composite material, and curing the abrasion section;
and S6, machining the wear section of the repaired shaft to an assembly size by adopting a lathe machining technology, and finishing the repair.
2. The shaft cold repair method according to claim 1, characterized in that: in the step S1, the number of segments and the width of the spiral band are matched with the size of the shaft, and n is more than or equal to 2.
3. The shaft cold repair method according to claim 1, characterized in that: in the step S1, the helical ribbon and the axial direction of the shaft form an included angle of 35-45 degrees.
4. The shaft cold repair method according to claim 1, characterized in that: in the step of S2, the height of the welding is larger than the nominal size height, and a machining allowance is reserved.
5. The shaft cold repair method according to claim 1, characterized in that: in the step of S5, the surface of the abrasion section is cleaned by baking and alcohol cleaning.
6. The shaft cold repair method according to claim 1, characterized in that: in step S5, the filling height of the polymer composite material to the wear segment is greater than the nominal dimension height.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110872706.7A CN113618332A (en) | 2021-07-30 | 2021-07-30 | Cold repair method for shafts |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110872706.7A CN113618332A (en) | 2021-07-30 | 2021-07-30 | Cold repair method for shafts |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113618332A true CN113618332A (en) | 2021-11-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110872706.7A Pending CN113618332A (en) | 2021-07-30 | 2021-07-30 | Cold repair method for shafts |
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| Country | Link |
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Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5341554A (en) * | 1992-08-05 | 1994-08-30 | David Diperstein | Method for repairing a cracked metal part using repair plugs coated with a surface layer of zinc |
| CN102492916A (en) * | 2011-12-21 | 2012-06-13 | 神龙汽车有限公司 | Recovering method for worn shaft surface of speed changing box |
| CN103008966A (en) * | 2012-12-05 | 2013-04-03 | 中国海洋石油总公司 | Repairing method of scrapped mud pump cylinder sleeve |
| US20130152389A1 (en) * | 2011-12-16 | 2013-06-20 | Sikorsky Aircraft Corporation | Rotor blade repair structure and method |
| CN106216938A (en) * | 2016-08-22 | 2016-12-14 | 怀宁吉利来精密机械科技有限公司 | A kind of water conservancy oscillating bearing rust cleaning and renovation technique |
| CN106826092A (en) * | 2017-02-10 | 2017-06-13 | 合肥福莱妮信息科技有限公司 | A kind of grinding roller abrasion and liner plate, clamping plate crack Repairing Technology |
| CN106984941A (en) * | 2017-03-10 | 2017-07-28 | 中广核核电运营有限公司 | Pump shaft surface corrosion restorative procedure |
| CN108997712A (en) * | 2018-06-27 | 2018-12-14 | 江苏宝力泰新材料科技有限公司 | A kind of polyimide fiber prepreg and preparation method thereof and application |
| CN109128684A (en) * | 2018-08-21 | 2019-01-04 | 首钢京唐钢铁联合有限责任公司 | Method for repairing main shaft of mixing machine |
| CN111843373A (en) * | 2020-07-27 | 2020-10-30 | 云南联合电力开发有限公司 | Method for improving abrasion damage rapid cold repair strength of flow passage component of water turbine |
-
2021
- 2021-07-30 CN CN202110872706.7A patent/CN113618332A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5341554A (en) * | 1992-08-05 | 1994-08-30 | David Diperstein | Method for repairing a cracked metal part using repair plugs coated with a surface layer of zinc |
| US20130152389A1 (en) * | 2011-12-16 | 2013-06-20 | Sikorsky Aircraft Corporation | Rotor blade repair structure and method |
| CN102492916A (en) * | 2011-12-21 | 2012-06-13 | 神龙汽车有限公司 | Recovering method for worn shaft surface of speed changing box |
| CN103008966A (en) * | 2012-12-05 | 2013-04-03 | 中国海洋石油总公司 | Repairing method of scrapped mud pump cylinder sleeve |
| CN106216938A (en) * | 2016-08-22 | 2016-12-14 | 怀宁吉利来精密机械科技有限公司 | A kind of water conservancy oscillating bearing rust cleaning and renovation technique |
| CN106826092A (en) * | 2017-02-10 | 2017-06-13 | 合肥福莱妮信息科技有限公司 | A kind of grinding roller abrasion and liner plate, clamping plate crack Repairing Technology |
| CN106984941A (en) * | 2017-03-10 | 2017-07-28 | 中广核核电运营有限公司 | Pump shaft surface corrosion restorative procedure |
| CN108997712A (en) * | 2018-06-27 | 2018-12-14 | 江苏宝力泰新材料科技有限公司 | A kind of polyimide fiber prepreg and preparation method thereof and application |
| CN109128684A (en) * | 2018-08-21 | 2019-01-04 | 首钢京唐钢铁联合有限责任公司 | Method for repairing main shaft of mixing machine |
| CN111843373A (en) * | 2020-07-27 | 2020-10-30 | 云南联合电力开发有限公司 | Method for improving abrasion damage rapid cold repair strength of flow passage component of water turbine |
Non-Patent Citations (1)
| Title |
|---|
| 拉季科夫斯基: "粘接剂在电气安装施工中的应用", 中国建筑工业出版社, article 王凯,王宝林, pages: 28 - 65 * |
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Application publication date: 20211109 |
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| RJ01 | Rejection of invention patent application after publication |