CN113275831B - Method for repairing shaft neck abrasion - Google Patents
Method for repairing shaft neck abrasion Download PDFInfo
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- CN113275831B CN113275831B CN202110766262.9A CN202110766262A CN113275831B CN 113275831 B CN113275831 B CN 113275831B CN 202110766262 A CN202110766262 A CN 202110766262A CN 113275831 B CN113275831 B CN 113275831B
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- mounting part
- journal
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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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Abstract
The invention relates to the technical field of journal repair, and particularly discloses a method for repairing journal abrasion. The method comprises the following steps: polishing the shaft neck of the mounting part by using an angle grinder; when the length of the shaft neck diameter of the mounting part smaller than the standard shaft neck diameter is within a first threshold value range, coating a metal repairing agent on the shaft neck of the mounting part; when the length of the diameter of the shaft neck of the installation part, which is larger than the diameter of the standard shaft neck, is within a second threshold range, sleeving the shaft sleeve mold on the installation part, and then disassembling the shaft sleeve mold; the rotating shaft is heated by a warm air drying box to be dried; wrapping the mounting part by using the sand paper, and then winding the cloth belt on the outer side of the sand paper; holding the two ends of the cloth belt and dragging in turn so as to grind the mounting part; the length up to the journal diameter of the mounting portion being greater than the standard journal diameter lies within a third threshold range. The method improves the repair process and procedure of the shaft neck, improves the working efficiency and ensures the repair success rate.
Description
Technical Field
The invention relates to the technical field of journal repair, in particular to a method for repairing journal abrasion.
Background
At present, a great number of chemical centrifugal pumps are used for conveying various fluid media in a gas purification and recovery system of a metallurgical coking plant, the types and specifications of the chemical pumps are various, and the power of the chemical pumps is mostly between 5 and 35 kW. Because most pumps are installed in the open air, lubricating oil of a pump body bearing box is very easy to be polluted by dust and rainwater to cause poor lubrication, and meanwhile, the continuous vibration of the pump body in the operation process can not only cause the abrasion failure of a bearing, but also cause the interference fit abrasion failure of the bearing inner ring and the shaft neck of the pump shaft.
If only the bearing is replaced during maintenance, the defects of the pump body cannot be thoroughly eliminated, so that the inner ring of the bearing can rotate along with the rotation of the pump shaft in the operation process, the service life of the bearing is shortened, the vibration of the pump body is aggravated, and a journal needs to be repaired before the bearing is replaced.
In the prior art, the mode of firstly welding and then polishing is mostly adopted for repairing the journal, and the chemical pump has small power and thinner pump shaft, most of the diameters are 30-50mm, and the pump shaft is very easy to bend and cannot be repaired due to welding heat influence in the welding process, so that the pump shaft is scrapped. The existence of the above conditions results in inefficient and high failure rates in the repair of the journal of the worn pump shaft.
Disclosure of Invention
The invention aims to provide a method for repairing the abrasion of a shaft neck so as to improve the working efficiency and the success rate of the abrasion repair of the shaft neck of a rotating shaft.
In order to achieve the purpose, the invention adopts the following technical scheme:
a method for repairing the abrasion of a shaft neck is applied to an installation part of a rotating shaft and comprises the following steps:
s11, polishing the shaft neck of the mounting part by using an angle grinder;
s20, measuring the diameter of the shaft neck of the mounting part, continuing to step S30 when the length of the diameter of the shaft neck of the mounting part, which is smaller than the diameter of a standard shaft neck, is within a first threshold range, and otherwise, returning to step S11;
s30, coating a metal repairing agent on the shaft neck of the mounting part;
s40, measuring the journal diameter of the mounting part, continuing to step S50 when the journal diameter of the mounting part is larger than the standard journal diameter and the length is in a second threshold range, otherwise, returning to step S30;
s50, sleeving a shaft sleeve mold on the mounting part, and then disassembling the shaft sleeve mold;
s60, heating the rotating shaft by using a warm air drying box to dry the rotating shaft;
s71, wrapping the mounting part by using sand paper, and then winding a cloth belt on the outer side of the sand paper;
s80, holding two ends of the cloth belts and dragging the cloth belts in turn so as to grind the mounting part;
s90, measuring the diameter of the shaft neck of the mounting part, finishing the processing of the shaft when the diameter of the shaft neck of the mounting part is larger than the diameter of the standard shaft neck and the length of the shaft neck is within a third threshold range, otherwise, returning to the step S80.
Wherein, the following steps are included before step S30:
and S31, pressing the metal repairing agent along the radial direction of the mounting part by using a scraper.
Preferably, the rotating shaft further includes a shoulder fixedly connected to the mounting portion, and the detailed step of step S50 includes:
s51, when the shaft sleeve mold is sleeved on the mounting portion, the shaft sleeve mold abuts against the shaft shoulder.
Further, the detailed step of step S51 further includes:
and S52, the shaft sleeve mold is rotatably sleeved on the mounting part, and then the shaft sleeve mold is rotatably separated from the mounting part.
Preferably, the detailed steps of step S60 include:
s61, heating the rotating shaft in the warm air drying box for two hours at the temperature of 80 ℃.
Preferably, step S71 is preceded by the steps of:
and S70, coating lubricating oil on the mounting part.
Preferably, the first threshold value ranges from 0.02 to 0.03 mm.
Preferably, the second threshold value is in the range of 0.06-0.08 mm.
Preferably, the third threshold value is in the range of 0.03-0.05 mm.
Preferably, the rotating shaft is mounted on a device, the bearing is sleeved on the mounting portion, and the method includes the following steps before step S11:
s10, taking out the rotating shaft from the equipment, and disassembling the bearing arranged on the mounting part;
the following steps are included after step S90:
s91, mounting the bearing on the mounting part, and then mounting the rotating shaft on the equipment.
The invention has the beneficial effects that:
according to the method, the shaft neck with the worn mounting part is uniformly polished by the angle grinder, then the repairing of the metal repairing agent is carried out, and then the repairing operation of the rotating shaft is completed in a mode of polishing again, the angle grinder is used for polishing, so that the subsequent repairing operation is conveniently and smoothly carried out, the repairing layer formed by the metal repairing agent after the surface of the mounting part is dried can be stably connected with the mounting part, the metal repairing agent is convenient to repair and simple to operate, the repairing efficiency is greatly improved, and the polishing effect is guaranteed and meanwhile the processing condition can be effectively held by an operator by the aid of manual polishing of the abrasive paper and the cloth belt. The method improves the repair process and procedure of the shaft neck, improves the repair efficiency of the rotating shaft and ensures the repair success rate.
Drawings
FIG. 1 is a flow chart of a method of repairing journal wear provided by an embodiment of the present invention;
FIG. 2 is a cross-sectional view of a shaft and bearing provided by an embodiment of the present invention;
FIG. 3 is a cross-sectional view of a spindle and bushing mold provided in accordance with an embodiment of the present invention;
fig. 4 is a schematic structural diagram of step S71 of a journal wear repairing method according to an embodiment of the present invention.
In the figure:
100. a rotating shaft; 110. an installation part; 120. a shaft shoulder; 200. repairing the layer; 300. a shaft sleeve mold; 400. sand paper; 500. a cloth belt; 600. and (5) a bearing.
Detailed Description
In order to make the technical problems solved, technical solutions adopted and technical effects achieved by the present invention clearer, the technical solutions of the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
In the description of the present invention, unless otherwise explicitly specified or limited, the terms "connected," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in a specific case to those of ordinary skill in the art.
In the present invention, unless expressly stated or limited otherwise, the recitation of a first feature "on" or "under" a second feature may include the recitation of the first and second features being in direct contact, and may also include the recitation that the first and second features are not in direct contact, but are in contact via another feature between them. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.
As shown in fig. 1, 3 and 4, the present embodiment provides a method for repairing a journal wear, which is applied to a mounting portion 110 of a rotating shaft 100, and includes the following steps:
step one, polishing the shaft neck of the mounting part 110 by using an angle grinder.
And step two, measuring the diameter of the journal of the mounting part 110, and continuing the step three when the length of the journal diameter of the mounting part 110 smaller than the standard journal diameter is within a first threshold range, otherwise, returning to the step one.
And step three, coating the metal repairing agent on the shaft neck of the mounting part 110.
Step four, measuring the journal diameter of the mounting part 110, when the length of the journal diameter of the mounting part 110 larger than the standard journal diameter is within a second threshold range, continuing to step five, otherwise, returning to step three.
And step five, sleeving the shaft sleeve mold 300 on the installation part 110, and then disassembling the shaft sleeve mold 300.
And sixthly, heating the rotating shaft 100 by using a warm air drying box to dry the rotating shaft 100.
And step seven, wrapping the mounting part 110 by using the sand paper 400, and then winding the cloth belt 500 on the outer side of the sand paper 400.
And step eight, holding the two ends of the cloth belt 500 and dragging in turn, thereby grinding the mounting part 110.
Step nine, measuring the diameter of the shaft neck of the mounting part 110, finishing the processing of the rotating shaft 100 when the length of the shaft neck diameter of the mounting part 110, which is larger than the standard shaft neck diameter, is within a third threshold range, and otherwise, returning to the step eight.
According to the method, the shaft neck abraded by the mounting portion 110 is uniformly polished by the angle grinder, then the repairing operation of the rotating shaft 100 is completed in a mode of repairing the metal repairing agent and polishing again, the angle grinder is used for polishing to facilitate the smooth proceeding of the subsequent repairing operation, the repairing layer 200 formed after the metal repairing agent is dried on the surface of the mounting portion 110 can be stably connected with the mounting portion 110, the metal repairing agent is convenient to repair and simple to operate, the repairing efficiency is greatly improved, and the polishing effect is guaranteed and the processing condition can be effectively grasped by an operator by the manual polishing of the abrasive paper 400 and the cloth belt 500. The above-mentioned content improves the repair process and procedure to the axle journal, and guarantees the success rate of repair while improving the repair efficiency of the rotating shaft 100.
Specifically, sandpaper 400 is oilstone sandpaper.
Preferably, when the journal of the mounting portion 110 is ground by the angle grinder, the grinding head of the angle grinder grinds in the axial direction of the mounting portion 110. The polishing quality of the angle grinder is guaranteed, and meanwhile, other components of the rotating shaft 100 are prevented from being accidentally damaged in the polishing process.
In this embodiment, the following steps are included before step one: the spindle 100 is cleaned and wiped with a veil. The arrangement ensures that the subsequent repairing process of the rotating shaft 100 is not influenced by the foreign matters attached to the rotating shaft 100 in the working process before the rotating shaft 100, improves the repairing effect of the rotating shaft 100 and prolongs the service life of the rotating shaft 100. Specifically, the rotating shaft 100 is cleaned by a cleaning agent, and the components of the cleaning agent are common knowledge in the art and are not described herein again.
In this embodiment, the following steps are included before step three: the metal healant is compressed in the radial direction of the mounting part 110 by means of a doctor blade. The pressing operation of the doctor blade ensures uniform adhesion of the metal healant on the shaft journal of the mounting portion 110, and ensures a compact structure of the repair layer 200 formed of the metal healant.
Preferably, the rotating shaft 100 further includes a shoulder 120 fixedly connected to the mounting portion 110, and the detailed step of step five includes: when the sleeve mold 300 is sleeved on the mounting portion 110, the sleeve mold 300 abuts against the shoulder 120. The arrangement that the shaft sleeve mold 300 is abutted to the shaft shoulder 120 ensures that the shaft sleeve mold 300 is fully contacted with the mounting portion 110, ensures the uniform coating of the repairing layer 200, and improves the repairing effect of the rotating shaft 100.
Specifically, the sleeve mold 300 is provided with a cylindrical shaping groove which is in contact with the mounting part 110, the diameter of the top of the shaping groove is 0.04-0.06mm larger than that of the standard shaft neck, and the diameter of the bottom of the shaping groove is 0.01mm larger than that of the standard shaft neck, so that the sleeve mold 300 can be sleeved smoothly, and the coaxiality of the repair part coated with the metal repairing agent can be guaranteed. The surface roughness of the inner wall of the sleeve mold 300 here is ra0.8.
Further, the detailed steps of step five further include: the sleeve mold 300 is rotatably coupled to the mounting portion 110, and then the sleeve mold 300 is rotated to be separated from the mounting portion 110. The mode of rotary sleeve joint and rotary separation can ensure that the shaft neck of the installation part 110 is fully contacted with the inner wall of the shaft sleeve die 300, the uniform stress of the metal repairing agent on each position of the shaft neck of the installation part 110 is ensured, the arrangement optimizes the distribution of the metal repairing agent on each position of the installation part 110, and the coaxiality of the coating position of the metal repairing agent is ensured.
Preferably, the detailed steps of the step six include: the shaft 100 was heated in a warm air drying oven at 80 ℃ for two hours. The heating temperature of the warm air drying box at 80 ℃ is lower than the highest temperature resistance of the metal repairing agent, meanwhile, the curing and forming of the metal repairing agent can be accelerated, and the hardness of the repairing layer 200 is ensured to be the same as that of the rotating shaft 100.
Specifically, the method comprises the following steps before the seventh step: the mounting portion 110 is coated with lubricating oil. The process of coating lubricating oil has improved the effect of manually polishing installation department 110 in step eight, has guaranteed that the axle journal surface of installation department 110 is even smooth, has improved the efficiency of whole pivot 100 repair flow.
Preferably, the first threshold range is 0.02-0.03 mm, the second threshold range is 0.06-0.08 mm, and the third threshold range is 0.03-0.05 mm. The numerical values optimize the processing details of the method, and the processing range is accurate while the shaft neck of the mounting part 110 is uniformly polished, the repairing layer 200 can be stably connected to the mounting part 110, and the mounting part 110 can be in interference fit with the bearing 600, so that the workload of operators is reduced, and the working efficiency is improved.
In the present embodiment, as shown in fig. 1 and 2, the shaft 100 is mounted to the device, the bearing 600 is sleeved on the mounting portion 110, and the following steps are included before the shaft 100 is cleaned and wiped with the veil: the rotating shaft 100 is taken out of the apparatus and the bearing 600 mounted to the mounting portion 110 is detached. The following steps are included after the step nine: the bearing 600 is mounted to the mounting portion 110, and the rotating shaft 100 is mounted to the device. The method combines the above contents, can complete the real-time maintenance operation of the rotating shaft 100 on the damaged equipment, thereby meeting the requirement of quick repair of the equipment, has low cost investment and high repair efficiency, can realize the quick recovery production of the equipment, and ensures the stable and smooth production. Specifically, the device is a chemical pump, and the rotating shaft 100 is a pump shaft.
In the present embodiment, if it occurs at step two or step nine that the journal diameter of the mounting portion 110 is smaller than the standard journal diameter by more than 0.03 mm in length, the journal of the mounting portion 110 should be coated with the metal healant, dried to form the mending layer 200 so that the journal of the mounting portion 110 is enlarged, and then returned to step one. If it happens at step four that the journal diameter of the mounting portion 110 is greater than the standard journal diameter by more than 0.08 mm, then it should be returned to step one to grind the journal of the mounting portion 110 so that the journal of the mounting portion 110 is reduced. The above-mentioned matters are conventional in the art, are well known and known to those skilled in the art, and are not described herein in detail.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (8)
1. A method for repairing journal wear applied to a mounting portion (110) of a rotating shaft (100), comprising the steps of:
s11, grinding the shaft neck of the mounting part (110) by using an angle grinder;
s20, measuring the journal diameter of the mounting part (110), and continuing to step S30 when the journal diameter of the mounting part (110) is smaller than the standard journal diameter and the length is within a first threshold range, or returning to step S11;
s30, coating a metal repairing agent on the shaft neck of the installation part (110), wherein the metal repairing agent forms a repairing layer (200) which is firmly connected with the installation part (110) after the surface of the installation part (110) is dried;
s40, measuring the journal diameter of the mounting part (110), and continuing to step S50 when the journal diameter of the mounting part (110) is larger than the standard journal diameter and the length is in a second threshold range, otherwise, returning to step S30;
s50, sleeving a shaft sleeve mold (300) on the installation part (110), and disassembling the shaft sleeve mold (300), wherein the shaft sleeve mold (300) is provided with a cylindrical shaping groove which is in contact with the installation part (110), the diameter of the top of the shaping groove is 0.04-0.06mm larger than that of a standard journal, and the diameter of the bottom of the shaping groove is 0.01mm larger than that of the standard journal;
the rotating shaft (100) further comprises a shaft shoulder (120) fixedly connected with the mounting part (110), and the detailed step of the step S50 comprises the following steps:
s51, when the shaft sleeve mold (300) is sleeved on the mounting part (110), the shaft sleeve mold (300) is abutted to the shaft shoulder (120);
the detailed step of step S50 further includes:
s52, the shaft sleeve mold (300) is sleeved on the mounting part (110) in a rotating mode, and then the shaft sleeve mold (300) is separated from the mounting part (110) in a rotating mode;
s60, heating the rotating shaft (100) by using a warm air drying box to dry the rotating shaft (100);
s71, wrapping the mounting part (110) by using sand paper (400), and then winding a cloth tape (500) on the outer side of the sand paper (400);
s80, holding two ends of the cloth belt (500) and dragging in turn, so that the mounting part (110) is ground;
s90, measuring the diameter of the shaft neck of the mounting part (110), finishing the processing of the rotating shaft (100) when the diameter of the shaft neck of the mounting part (110) is larger than the diameter of the standard shaft neck and the length is within a third threshold range, otherwise, returning to the step S80.
2. The method for repairing journal wear according to claim 1, wherein the detailed step of step S30 includes:
and S31, pressing the metal repairing agent along the radial direction of the mounting part (110) by using a scraper.
3. The method for repairing journal wear according to claim 1, wherein the detailed step of step S60 comprises:
s61, heating the rotating shaft (100) in the warm air drying box for two hours at the temperature of 80 ℃.
4. The method for repairing journal wear according to claim 1, comprising the steps of, before step S71:
s70, applying lubricating oil to the mounting part (110).
5. The method of repairing journal wear according to claim 1, wherein the first threshold range is 0.02-0.03 mm.
6. A method of repairing journal wear as in claim 1 wherein the second threshold is in the range of 0.06-0.08 mm.
7. The method of repairing journal wear according to claim 1, wherein the third threshold range is 0.03-0.05 mm.
8. The method for repairing journal wear according to any one of claims 1-7, wherein the rotating shaft (100) is installed in a device, the bearing (600) is sleeved on the installation part (110), and the method comprises the following steps before step S11:
s10, taking out the rotating shaft (100) from the equipment, and disassembling the bearing (600) mounted on the mounting part (110);
the following steps are included after step S90:
s91, mounting the bearing (600) on the mounting part (110), and then mounting the rotating shaft (100) on the equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110766262.9A CN113275831B (en) | 2021-07-07 | 2021-07-07 | Method for repairing shaft neck abrasion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110766262.9A CN113275831B (en) | 2021-07-07 | 2021-07-07 | Method for repairing shaft neck abrasion |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113275831A CN113275831A (en) | 2021-08-20 |
| CN113275831B true CN113275831B (en) | 2023-04-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110766262.9A Active CN113275831B (en) | 2021-07-07 | 2021-07-07 | Method for repairing shaft neck abrasion |
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Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN206855281U (en) * | 2017-04-05 | 2018-01-09 | 兰州金研激光再制造技术开发有限公司 | A kind of instrument for cylindrical outer surface of being polished using sand paper |
| CN111633379A (en) * | 2020-07-01 | 2020-09-08 | 中材萍乡水泥有限公司 | Shaft repairing process |
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