CN113732618A - Method for repairing large gear ring of embedded shield main bearing - Google Patents
Method for repairing large gear ring of embedded shield main bearing Download PDFInfo
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- CN113732618A CN113732618A CN202111311539.5A CN202111311539A CN113732618A CN 113732618 A CN113732618 A CN 113732618A CN 202111311539 A CN202111311539 A CN 202111311539A CN 113732618 A CN113732618 A CN 113732618A
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- gear ring
- large gear
- embedded
- tooth
- teeth
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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
Abstract
The invention discloses a method for repairing a large gear ring of an embedded type shield main bearing, and belongs to the technical field of shield machines. The method solves the problems that in the prior art, the repair process is complex, the repair cost is high, and stress concentration is easily generated to influence the safety performance of the large gear ring. The invention comprises the following steps: 1. analyzing the material of the large gear ring; 2. analyzing and designing the shape of the tooth profile; 3. an installation groove for installing the embedded teeth is formed in the large gear ring; 4. carrying out insert tooth processing and heat treatment according to the shape, the size and the chemical components of the tooth shape; 5. mounting the embedded teeth and the mounting groove in interference fit; 6. and (3) arranging a threaded hole at the joint of the embedded tooth and the large gear ring, wherein one part of the hole wall of the threaded hole is positioned on the embedded tooth, the other part of the hole wall of the threaded hole is positioned on the mounting groove, and finally, cold welding is carried out on the gap between the embedded tooth and the large gear ring through a screw hole mounting screw. The repairing method is simple, the phenomenon of stress concentration can not occur, and the repairing effect and the safety performance of the large gear ring are improved.
Description
Technical Field
The invention belongs to the technical field of shield tunneling machines, and particularly relates to a method for repairing a large gear ring of an embedded shield main bearing.
Background
Along with the subway construction projects are continuously increased, subway lines are more and more dense, a plurality of subway line crossing phenomena exist, the geology of subway construction is more and more complex, in the construction process, the loads such as torque and the like borne by the main bearing are more and more close to the rated load designed by the large gear ring of the main bearing, microcracks often occur on the local tooth-shaped surface of the large gear ring, and the performance safety of the large gear ring is influenced.
In the prior art, for a tooth form which locally generates micro cracks or is locally damaged, a repairing method is generally adopted, wherein the damaged tooth form is replaced or cut off, and then welding surfacing repair is carried out, but the repairing method has strict process control and has the risk of scrapping. In the prior art, a method of fixing repair teeth on a large gear ring through a fixing piece and then welding and repairing is adopted, but welding processing can cause damage influence on tooth shapes of adjacent teeth, local heat treatment is needed after welding, and welding heat influence can cause local stress concentration to influence the repair effect and the performance safety of the large gear ring.
Disclosure of Invention
Aiming at the problems of complex repair process, high repair cost and easy stress concentration generation to influence the safety performance of a large gear ring in the prior art, the invention provides a method for repairing a large gear ring of an embedded shield main bearing, which aims to solve the problems that: the repair process is simplified, the scrapping risk is reduced, and the influence of stress concentration on the performance of the large gear ring is avoided.
The technical scheme adopted by the invention is as follows:
a method for repairing a large gear ring of an embedded shield main bearing comprises the following steps:
step 1: analyzing the material of the large gear ring: cutting and sampling the damaged teeth, and analyzing chemical components of the samples to determine the chemical components of the inlaid teeth;
step 2: analyzing and designing the shape of the tooth profile: determining the tooth shape and size of the embedded tooth by using a three-dimensional laser scanner, making a sample plate according to the determined tooth shape, size and chemical components, comparing the made sample plate with the tooth on the large gear ring, and performing modification design on the embedded tooth according to the comparison result;
and step 3: processing an installation groove for installing the embedded teeth on the large gear ring;
and 4, step 4: carrying out insert tooth processing according to the shape, size and chemical composition of the tooth shape, and carrying out heat treatment after the processing is finished;
and 5: mounting the heat-treated embedded teeth and the mounting groove in interference fit;
step 6: the connection part of the embedded tooth and the large gear ring is provided with a plurality of threaded holes, one part of the hole wall of each threaded hole is positioned on the embedded tooth, the other part of the hole wall of each threaded hole is positioned on the mounting groove, and the connection strength of the embedded tooth and the large gear ring is enhanced through the threaded hole mounting screws.
After the technical scheme is adopted, when a certain tooth on the large gear ring is damaged, the embedded tooth can be arranged on the large gear ring in an interference fit and screw connection mode.
Preferably, the mounting groove in the step 3 is in a T shape, and the bottom of the embedded tooth is matched with the mounting groove in shape.
After the preferred scheme is adopted, the T-shaped mounting groove can further limit the up-and-down movement of the embedded teeth, and the connection strength of the embedded teeth and the large gear ring is higher.
Preferably, the specific operation of step 5 is as follows: and cooling the embedded teeth by using liquid nitrogen, and then installing the cooled embedded teeth in the installation groove on the large gear ring.
After adopting this preferred scheme, after the inserted tooth is cooled by liquid nitrogen, the volume dwindles, after the inserted tooth is installed on the mounting groove, along with the rising of temperature, the volume of inserted tooth increases gradually, makes its and mounting groove zonulae occludens. The method is convenient to install, and the mosaic teeth can be installed on the installation groove only by small force.
Preferably, in step 6, the number of the threaded holes is 4, and the threaded holes are respectively located at two ends of the bottom of the connecting part of the mosaic tooth and the mounting groove.
After adopting this preferred scheme, through screw hole and hexagon socket head cap screw cooperation, can restrict the length direction that the embedded tooth followed the mounting groove and slide to further improve the installation intensity of embedded tooth, improve prosthetic reliability.
Preferably, in step 6, the screw is a socket head cap screw, and a nut of the socket head cap screw does not protrude out of the plane of the large gear ring.
After the preferred scheme is adopted, the screw cap does not protrude out of the plane of the large gear ring, so that the normal work of the large gear ring is prevented from being influenced.
Preferably, after step 6, cold welding is performed on the gap between the mosaic tooth and the large gear ring.
After the preferred scheme is adopted, the connection strength of the mosaic teeth and the large gear ring is higher, and because cold welding is carried out at normal temperature, the stress of the joint can be uniformly distributed on all rubber surfaces, the phenomenon of stress concentration can not occur, the fatigue strength is improved, and the safety performance of the large gear ring is improved.
The invention also provides a large gear ring repairing structure of the embedded shield main bearing.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:
1. according to the invention, the embedded teeth are arranged on the large gear ring in an interference fit and screw connection mode, the repairing method is simple, the process is reliable, the cost is lower, the connecting strength of the embedded teeth and the large gear ring is high, welding is not needed, the tooth form of adjacent teeth cannot be damaged and influenced, the phenomenon of stress concentration cannot occur, and the repairing effect and the safety performance of the large gear ring are improved.
2. The mounting groove is T-shaped, the up-and-down movement of the mosaic teeth can be further limited, and the connection strength of the mosaic teeth and the large gear ring is higher.
3. After the mosaic tooth is cooled by liquid nitrogen, the volume is reduced, and after the mosaic tooth is installed on the installation groove, along with the rise of temperature, the volume of the mosaic tooth is gradually increased, so that the mosaic tooth is tightly connected with the installation groove. The method is convenient to install, and the mosaic teeth can be installed on the installation groove only by small force.
4. Through screw hole and screw cooperation, can restrict the length direction that the inserted tooth followed the mounting groove and slide to further improve the installation intensity of inserted tooth, improve prosthetic reliability.
5. The nut of the socket head cap screw does not protrude out of the plane of the large gear ring, so that the normal work of the large gear ring is prevented from being influenced.
6. The cold welding treatment is carried out on the gap between the embedded teeth and the large gear ring, the connection strength of the embedded teeth and the large gear ring is higher, and the cold welding is carried out at normal temperature, so that the stress of the joint can be uniformly distributed on all rubber surfaces, the phenomenon of stress concentration cannot occur, the fatigue strength is improved, and the safety performance of the large gear ring is improved.
Drawings
The invention will now be described, by way of example, with reference to the accompanying drawings, in which:
fig. 1 is a schematic structural view of the present invention.
Wherein, 1-big gear ring, 2-embedded tooth and 3-inner hexagon screw.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all the embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present application without making any creative effort, shall fall within the protection scope of the present application.
In the description of the embodiments of the present application, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the present invention are usually placed in when used, and are only used for convenience of description and simplicity of description, but do not indicate or imply that the devices or elements that are referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present application. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
The present invention will be described in detail with reference to fig. 1.
A method for repairing a large gear ring of an embedded shield main bearing comprises the following steps:
step 1: analyzing the material of the large gear ring: cutting and sampling the damaged teeth, and carrying out chemical component analysis on the samples to determine the chemical components of the inlaid teeth (because the main bearing large gear ring usually does not know what the used raw materials are when the shield machine is maintained, the material analysis is carried out);
step 2: analyzing and designing the shape of the tooth profile: determining the tooth shape and size of the embedded tooth by using a three-dimensional laser scanner, making a sample plate according to the determined tooth shape, size and chemical components, comparing the made sample plate with the tooth on the large gear ring, and performing modification design on the embedded tooth according to the comparison result;
and step 3: processing an installation groove for installing the embedded teeth on the large gear ring;
and 4, step 4: according to the shape, the size and the chemical components of the tooth shape, the processing of the mosaic tooth is carried out in a processing factory, and the mosaic tooth 2 is subjected to heat treatment after the processing is finished; the embedded teeth 2 are separately processed, and then are subjected to heat treatment after being processed, and then are embedded after the heat treatment is finished, so that the size requirement of mechanical processing equipment and the size requirement of heat treatment equipment are lower;
and 5: mounting the heat-treated embedded teeth and the mounting groove in interference fit;
step 6: set up the several screw hole in the junction of mosaic tooth and bull gear, the pore wall of screw hole partly is located mosaic tooth, and another part is located the mounting groove, to mounting screw in the screw hole to restriction mosaic tooth 2 takes place relative displacement along mounting groove length direction with bull gear 1, reinforcing mosaic tooth and bull gear's joint strength.
In this embodiment, as shown in fig. 1, the mounting groove in step 3 is T-shaped, and the bottom of the insert is matched with the mounting groove. In another embodiment, the shape of the mounting groove may be other shapes, such as rectangular, trapezoidal, stepped, etc.
In this embodiment, the specific operation of step 5 is as follows: and cooling the mosaic tooth by using liquid nitrogen, pressing the cooled mosaic tooth into the mounting groove from the side surface of the mounting groove through pressing equipment or manpower, and then waiting for the slow temperature rise of the mosaic tooth to normal temperature.
As shown in fig. 1, in this embodiment, the number of the threaded holes in step 6 is 4, the threaded holes are blind holes, two threaded holes are respectively provided on two sides of the mosaic tooth 2, and two corners of the threaded holes, which are located at the bottoms of the mosaic tooth 2 and the mounting groove, are located. In another embodiment, the number of the threaded holes may be 6 or 8, and it is sufficient to ensure that a part of the hole walls of the threaded holes is located on the mosaic teeth 2 and a part of the hole walls of the threaded holes is located on the large gear ring 1.
In this embodiment, the screw in step 6 is the socket head cap screw 3, and the nut of the socket head cap screw 3 does not protrude out of the plane where the large gear ring is located (i.e., the depth of the threaded hole is greater than the length of the socket head cap screw 3), so as to avoid affecting the normal operation of the large gear ring. In another embodiment, cross or in-line screws may be used.
After the socket head cap screws are installed, cold welding is carried out on gaps between the embedded teeth and the large gear ring, the connection strength of the embedded teeth 2 and the large gear ring 1 is further improved, and stress concentration is not generated.
The above-mentioned embodiments only express the specific embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present application. It should be noted that, for those skilled in the art, without departing from the technical idea of the present application, several changes and modifications can be made, which are all within the protection scope of the present application.
Claims (6)
1. A method for repairing a large gear ring of an embedded shield main bearing is characterized by comprising the following steps:
step 1: analyzing the material of the large gear ring: cutting and sampling the damaged teeth, and analyzing chemical components of the samples to determine the chemical components of the inlaid teeth;
step 2: analyzing and designing the shape of the tooth profile: determining the tooth shape and size of the embedded tooth by using a three-dimensional laser scanner, making a sample plate according to the determined tooth shape, size and chemical components, comparing the made sample plate with the tooth on the large gear ring, and performing modification design on the embedded tooth according to the comparison result;
and step 3: processing an installation groove for installing the embedded teeth on the large gear ring;
and 4, step 4: carrying out insert tooth processing according to the shape, size and chemical composition of the tooth shape, and carrying out heat treatment after the processing is finished;
and 5: mounting the heat-treated embedded teeth and the mounting groove in interference fit;
step 6: the connection part of the embedded tooth and the large gear ring is provided with a plurality of threaded holes, one part of the hole wall of each threaded hole is positioned on the embedded tooth, the other part of the hole wall of each threaded hole is positioned on the mounting groove, and the connection strength of the embedded tooth and the large gear ring is enhanced through the threaded hole mounting screws.
2. The method for repairing the large gear ring of the embedded shield main bearing according to claim 1, wherein the method comprises the following steps: and 3, the mounting groove is T-shaped, and the bottom of the embedded tooth is matched with the mounting groove in shape.
3. The method for repairing the large gear ring of the embedded shield main bearing according to claim 1, wherein the method comprises the following steps: the specific operation of step 5 is as follows: and cooling the embedded teeth by using liquid nitrogen, and then installing the cooled embedded teeth in the installation groove on the large gear ring.
4. The method for repairing the large gear ring of the embedded shield main bearing according to claim 1, wherein the method comprises the following steps: in the step 6, the number of the threaded holes is 4, and the threaded holes are respectively positioned at two ends of the bottom of the connecting part of the mosaic teeth and the mounting groove.
5. The method for repairing the large gear ring of the embedded shield main bearing according to claim 4, wherein the method comprises the following steps: in the step 6, the screw is an inner hexagon screw, and the nut of the inner hexagon screw does not protrude out of the plane of the large gear ring.
6. The method for repairing the large gear ring of the embedded shield main bearing according to claim 1, wherein the method comprises the following steps: and after the step 6, performing cold welding treatment on the gap between the mosaic tooth and the large gear ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111311539.5A CN113732618A (en) | 2021-11-08 | 2021-11-08 | Method for repairing large gear ring of embedded shield main bearing |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111311539.5A CN113732618A (en) | 2021-11-08 | 2021-11-08 | Method for repairing large gear ring of embedded shield main bearing |
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| CN113732618A true CN113732618A (en) | 2021-12-03 |
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| CN202111311539.5A Pending CN113732618A (en) | 2021-11-08 | 2021-11-08 | Method for repairing large gear ring of embedded shield main bearing |
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Citations (10)
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|---|---|---|---|---|
| DD256668A1 (en) * | 1986-06-16 | 1988-05-18 | Kreisbetrieb F Landtechnik Gue | METHOD FOR THE REPAIR OF THREADED BRAKES |
| FR2866585A1 (en) * | 2004-02-25 | 2005-08-26 | Diag Metal | Gear tooth repairing process, involves placing blocking point on lower side of rim, and placing one blocking point on side of one tooth, and activating cutting tool for sharpening section of side of another tooth |
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| CN206065800U (en) * | 2016-08-31 | 2017-04-05 | 邢台德龙机械轧辊有限公司 | A kind of gear inlays prosthetic device |
| CN106795957A (en) * | 2014-10-24 | 2017-05-31 | 维斯塔斯风力系统有限公司 | Repair the gear parts in wind turbine |
| CN109551167A (en) * | 2018-11-26 | 2019-04-02 | 阳泉煤业集团华越机械有限公司煤机装备研究院 | A kind tooth reproduces gear restorative procedure |
| CN110735908A (en) * | 2019-10-29 | 2020-01-31 | 中交烟台环保疏浚有限公司 | Method for repairing broken gear |
| CN112222460A (en) * | 2020-09-17 | 2021-01-15 | 呼和牧仁 | Quick prosthetic devices during gear broken tooth |
| CN112958996A (en) * | 2021-02-09 | 2021-06-15 | 北京建工土木工程有限公司 | Repairing method of gear ring for shield machine |
-
2021
- 2021-11-08 CN CN202111311539.5A patent/CN113732618A/en active Pending
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| DD256668A1 (en) * | 1986-06-16 | 1988-05-18 | Kreisbetrieb F Landtechnik Gue | METHOD FOR THE REPAIR OF THREADED BRAKES |
| FR2866585A1 (en) * | 2004-02-25 | 2005-08-26 | Diag Metal | Gear tooth repairing process, involves placing blocking point on lower side of rim, and placing one blocking point on side of one tooth, and activating cutting tool for sharpening section of side of another tooth |
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| CN106795957A (en) * | 2014-10-24 | 2017-05-31 | 维斯塔斯风力系统有限公司 | Repair the gear parts in wind turbine |
| CN206065800U (en) * | 2016-08-31 | 2017-04-05 | 邢台德龙机械轧辊有限公司 | A kind of gear inlays prosthetic device |
| CN109551167A (en) * | 2018-11-26 | 2019-04-02 | 阳泉煤业集团华越机械有限公司煤机装备研究院 | A kind tooth reproduces gear restorative procedure |
| CN110735908A (en) * | 2019-10-29 | 2020-01-31 | 中交烟台环保疏浚有限公司 | Method for repairing broken gear |
| CN112222460A (en) * | 2020-09-17 | 2021-01-15 | 呼和牧仁 | Quick prosthetic devices during gear broken tooth |
| CN112958996A (en) * | 2021-02-09 | 2021-06-15 | 北京建工土木工程有限公司 | Repairing method of gear ring for shield machine |
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Application publication date: 20211203 |
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