CN114135576B - Main bearing of heading machine and processing method of main bearing outer ring assembly - Google Patents
Main bearing of heading machine and processing method of main bearing outer ring assembly Download PDFInfo
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- CN114135576B CN114135576B CN202111515649.3A CN202111515649A CN114135576B CN 114135576 B CN114135576 B CN 114135576B CN 202111515649 A CN202111515649 A CN 202111515649A CN 114135576 B CN114135576 B CN 114135576B
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- outer ring
- hole
- mounting hole
- assembly
- pin shaft
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- 238000003672 processing method Methods 0.000 title claims abstract description 8
- 238000003754 machining Methods 0.000 claims abstract description 14
- 238000010791 quenching Methods 0.000 claims abstract description 5
- 230000000171 quenching effect Effects 0.000 claims abstract description 5
- 238000000034 method Methods 0.000 claims description 12
- 230000000149 penetrating effect Effects 0.000 claims description 5
- 238000004381 surface treatment Methods 0.000 claims description 4
- 238000007689 inspection Methods 0.000 claims description 3
- 238000005496 tempering Methods 0.000 claims description 3
- 239000006249 magnetic particle Substances 0.000 claims 1
- 238000010008 shearing Methods 0.000 abstract description 3
- 230000005641 tunneling Effects 0.000 description 5
- 239000006247 magnetic powder Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C19/00—Bearings with rolling contact, for exclusively rotary movement
- F16C19/50—Other types of ball or roller bearings
- F16C19/505—Other types of ball or roller bearings with the diameter of the rolling elements of one row differing from the diameter of those of another row
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/30—Parts of ball or roller bearings
- F16C33/58—Raceways; Race rings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/30—Parts of ball or roller bearings
- F16C33/58—Raceways; Race rings
- F16C33/60—Raceways; Race rings divided or split, e.g. comprising two juxtaposed rings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/30—Parts of ball or roller bearings
- F16C33/58—Raceways; Race rings
- F16C33/64—Special methods of manufacture
Abstract
The application provides a main bearing of a heading machine, which comprises an outer ring assembly, an inner ring assembly and a roller assembly. The processing method of the main bearing outer ring assembly comprises the following steps: after the inner and outer surfaces of the first outer ring and the second outer ring are processed, quenching is carried out on quenching areas of the first outer ring and the second outer ring; machining a threaded hole in the first outer ring and a third mounting hole in the second outer ring; the threaded hole of the first outer ring and the third mounting hole of the second outer ring are connected through bolts, and then a pin shaft hole is machined; after the first outer ring and the second outer ring are precisely positioned and connected through the pin shaft, a first mounting hole and a second mounting hole are machined. According to the application, the outer ring assembly is processed through the steps, so that the occurrence of step shearing main driving connecting bolts between contact surfaces of the first mounting hole and the second mounting hole during assembly of the outer ring assembly is avoided, the perpendicularity and processing precision between the first mounting hole and the second mounting hole are effectively ensured, and the assembly precision during repeated disassembly and assembly of the main bearing of the development machine is ensured.
Description
Technical Field
The application relates to the technical field of machining, in particular to a main bearing of a heading machine and a machining method of an outer ring component of the main bearing.
Background
In the development machine, the main bearing is used as a heart of the full-face tunnel development machine and bears the main load in the operation process of the development machine. The main drive of the heading machine is arranged on a shield body of the heading machine, the main bearing is arranged in the middle of the main drive, and a connecting bolt penetrating through a connecting through hole of the main bearing is used for firmly fixing an outer ring of the main bearing and the main drive between the main drive and the main bearing; the weight of silt in the cutter head and the tunneling process of the shield tunneling machine is transmitted to the inner ring of the main bearing through the main driving flange, and the roller assembly bears the running load of the tunneling machine, so that the processing precision of the connecting through hole on the main bearing is significant for the performances of the connecting bolt of the main driving and the main driving.
At present, the assembly methods of the mounting through holes on the main bearing all adopt split processing, and the method easily causes that the coaxiality of the connecting through holes cannot be ensured when the outer ring of the main bearing is assembled due to the reasons of machine tool positioning errors, cutter abrasion and the like, so that steps appear to cause the perpendicularity of the outer ring connecting through holes to deviate when the main bearing is assembled. However, when the heading machine is heading under severe working conditions, the coaxiality of the connecting through holes cannot be guaranteed when the outer ring is assembled, so that the main driving connecting bolt is sheared, the stressed working conditions of the main driving connecting bolt are deteriorated, and the risk that the main driving connecting bolt is cut off by an assembling step between the mounting holes exists.
Disclosure of Invention
Aiming at the defects of the prior art, the application provides a main bearing of a heading machine and a processing method of a main bearing outer ring component, which aim to ensure the perpendicularity between mounting holes of the main bearing outer ring, improve the processing efficiency of the mounting holes and avoid the occurrence of step shearing connecting bolts between the mounting holes during assembly.
In order to achieve the above purpose, the application provides a main bearing of a heading machine, which comprises an outer ring assembly, an inner ring assembly and a roller assembly; the outer ring assembly comprises a first outer ring and a second outer ring which are arranged in parallel with the central axis; the first outer ring is provided with a first connecting hole, a first mounting hole, a threaded hole and a first pin shaft hole, and the first connecting hole is arranged along the central axis of the first outer ring in a penetrating way; the first mounting hole, the threaded hole and the first pin shaft hole are respectively provided with a plurality of mounting holes distributed along the central axis of the first outer ring; the second outer ring is provided with a second connecting hole, a second mounting hole, a third mounting hole and a second pin shaft hole, and the second connecting hole is arranged in a penetrating manner along the central axis of the second outer ring; the second mounting hole, the third mounting hole and the second pin shaft hole are respectively provided with a plurality of mounting holes distributed along the central axis of the second outer ring, and are respectively arranged in one-to-one correspondence with the first mounting hole, the threaded hole and the first pin shaft hole; the first connecting hole and the second connecting hole form a mounting cavity for mounting the roller assembly and the inner ring, and the roller assembly is arranged between the outer ring assembly and the inner ring.
Optionally, the first pin shaft hole and the second pin shaft hole are both provided with a conical structure.
Optionally, the contact part of the inner wall surface of the first connecting hole and the inner ring is matched with the contact surface of the inner ring.
Optionally, the roller assembly comprises a main pushing roller, an auxiliary pushing roller and a radial roller, and the outer surface of the main pushing roller is simultaneously contacted with the inner wall of the first outer ring and the outer wall of the inner ring; the outer surface of the auxiliary pushing roller is simultaneously contacted with the inner wall of the second outer ring and the outer wall of the inner ring; the outer surface of the radial roller is contacted with the inner wall of the first outer ring and the outer wall of the inner ring simultaneously, and one end surface of the radial roller is aligned with the contact surfaces of the first outer ring and the second outer ring; the central axes of the main pushing roller and the auxiliary pushing roller are arranged in parallel, and the central axes of the radial rollers and the central axes of the main pushing rollers are arranged in a mutually perpendicular mode.
The application also provides a processing method of the main bearing outer ring assembly, which comprises the following steps:
1) Respectively processing the outer surface of the first outer ring, the outer surface of the second outer ring, the first connecting hole and the second connecting hole;
2) Respectively machining a first connecting hole threaded hole of the first outer ring and a second connecting hole through hole of the second outer ring;
3) Connecting the threaded hole and the third mounting hole with each other by adopting a connecting bolt;
4) Machining a first pin shaft hole of the first outer ring and a second pin shaft hole of the second outer ring;
5) The first pin shaft hole and the second pin shaft hole are connected with each other by adopting a pin shaft;
6) And processing the first mounting hole of the first outer ring and the second mounting hole of the second outer ring.
Optionally, the outer surface of the first outer ring and the outer surface of the second outer ring are processed in a rough processing, surface treatment and finish processing mode.
Optionally, the surface treatment comprises quenching treatment, tempering treatment and magnetic powder inspection treatment on the contact part of the first outer ring and the roller assembly and the contact part of the second outer ring and the roller assembly.
Alternatively, when the first connecting hole and the second connecting hole are machined, machining is performed from one end of the first outer ring to the direction of the second outer ring.
Compared with the prior art, the application has the following beneficial effects:
(1) According to the main bearing of the heading machine, the outer ring assembly is of the combined structure of the first outer ring and the second outer ring, so that the main bearing is convenient to assemble (the first outer ring is assembled with the main push roller assembly, the inner ring, the radial roller assembly and the auxiliary push roller assembly, and then the second outer ring is assembled, so that the installation difficulty is reduced).
(2) According to the processing method of the main bearing outer ring assembly, after other parts (the outer surface, the inner surface, the threaded holes and the third mounting holes) of the outer ring are processed, the first outer ring and the second outer ring are mutually locked and connected by adopting the connecting bolts, and then the first pin shaft hole and the second pin shaft hole are processed, so that the first pin shaft hole and the second pin shaft hole can be ensured to be positioned on the same axis when being repeatedly disassembled and installed; the pin shafts are adopted to accurately position and connect the first outer ring and the second outer ring, and then the first mounting hole and the second mounting hole are processed, so that the first mounting hole and the second mounting hole can be ensured to be positioned on the same axis when the first mounting hole and the second mounting hole are repeatedly detached and mounted; the occurrence of step shearing of the main driving connecting bolt between the contact surfaces of the first mounting hole and the second mounting hole during assembly of the outer ring assembly is avoided, the perpendicularity and the machining precision between the first mounting hole and the second mounting hole are effectively ensured, the stress working condition of the main driving connecting bolt is improved, the working performance of the main driving of the tunneling machine is improved, and the assembly precision of the main bearing of the tunneling machine during repeated disassembly and assembly is ensured.
In addition to the objects, features and advantages described above, the present application has other objects, features and advantages. The present application will be described in further detail with reference to the drawings.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application. In the drawings:
FIG. 1 is a schematic cross-sectional view of a main bearing of a heading machine along a first mounting hole and a second mounting hole to a central axis in an embodiment of the application;
FIG. 2 is a schematic cross-sectional view of a main bearing of the heading machine along a threaded hole, a third mounting hole and a central axis in an embodiment of the application;
FIG. 3 is a schematic cross-sectional view of a main bearing of a heading machine along a first pin bore, a second pin bore, and a central axis in accordance with an embodiment of the application.
Wherein:
1. the novel roller assembly comprises an outer ring assembly, 1.1, a first outer ring, 1.1.1, a first mounting hole, 1.1.2, a threaded hole, 1.1.3, a first pin shaft hole, 1.2, a second outer ring, 1.2.1, a second mounting hole, 1.2.2, a third mounting hole, 1.2.3, a second pin shaft hole, 2, an inner ring, 3, a roller assembly, 3.1, a main pushing roller, 3.2, an auxiliary pushing roller, 3.3 and a radial roller.
Detailed Description
In order that the above objects, features and advantages of the application will be readily understood, a more particular description of the application will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings. It should be noted that the drawings of the present application are in simplified form and are not precisely scaled, so as to facilitate the clear and convenient explanation of the implementation of the present application; the application is not limited to the specific numbers mentioned in the examples of the drawings; the directions and positional relationships indicated by the terms "rear", "left", "right", "upper", "lower", "top", "bottom", "middle", etc. in the present application are all based on the directions and positional relationships shown in the drawings of the present application, and do not indicate or imply that the device or component to be referred to must have a specific direction, nor should it be construed as limiting the present application.
Examples:
referring to fig. 1 to 3, the main bearing of the heading machine provided by the application comprises an outer ring assembly 1, an inner ring 2 and a roller assembly 3;
the outer ring assembly 1 comprises a first outer ring 1.1 and a second outer ring 1.2 which are arranged up and down, wherein a first connecting hole, a first mounting hole 1.1.1, a threaded hole 1.1.2 and a first pin shaft hole 1.1.3 are formed in the first outer ring 1.1, a second connecting hole, a second mounting hole 1.2.1, a third mounting hole 1.2.2 and a second pin shaft hole 1.2.3 are formed in the second outer ring 1.2, the first connecting hole penetrates through along the central axis of the first outer ring 1.1, the second connecting hole penetrates through along the central axis of the second outer ring 1.2, and a plurality of first mounting holes 1.1.1, threaded holes 1.1.2 and first pin shaft holes 1.1.3 are distributed along the central axis of the first outer ring 1.1 and are located outside the first connecting hole; the second mounting hole 1.2.1, the third mounting hole 1.2.2 and the second pin shaft hole 1.2.3 are respectively provided with a plurality of mounting holes distributed along the central axis of the second outer ring 1.2 and are respectively positioned outside the second connecting hole; the first mounting holes 1.1.1 and the second mounting holes 1.2.1 are arranged in a one-to-one correspondence manner, the threaded holes 1.1.2 and the third mounting holes 1.2.2 are arranged in a one-to-one correspondence manner, the first pin holes 1.1.3 and the second pin holes 1.2.3 are arranged in a one-to-one correspondence manner, the first mounting holes 1.1.1 and the second mounting holes 1.2.1 are used for being connected with a heading machine, the threaded holes 1.1.2 and the third mounting holes 1.2.2 are connected with each other through a plurality of connecting bolts, and the first pin holes 1.1.3 and the second pin holes 1.2.3 are connected with each other through a plurality of pins;
the inner ring 2 is arranged in the first connecting hole and the second connecting hole, and a roller component 3 is further arranged between the outer wall of the inner ring 2 and the inner walls of the first connecting hole and the second connecting hole.
Preferably, the roller assembly 3 comprises a main pushing roller 3.1, an auxiliary pushing roller 3.2 and a radial roller 3.3, wherein the main pushing roller 3.1 is arranged between the first outer ring 1.1 and the inner ring 2, the auxiliary pushing roller 3.2 is arranged between the second outer ring 1.2 and the inner ring 2, the radial roller 3.3 is arranged between the inner ring 2 and the first outer ring 1.1, one end of the radial roller 3.3 is in contact with the end face of the second outer ring 1.2, and the central axis of the radial roller 3.3 is mutually perpendicular to the central axes of the main pushing roller 3.1 and the auxiliary pushing roller 3.2.
Preferably, the first pin shaft hole 1.1.3 and the second pin shaft hole 1.2.3 are both arranged in a conical structure.
Preferably, the cross sections of the first connecting hole and the second connecting hole are consistent with the cross section of the matching part of the inner ring 2.
The processing method of the main bearing outer ring assembly comprises the following specific steps:
1) Rough machining is respectively carried out on the inner surface and the outer surface of the first outer ring and the second outer ring (the inner surface and the outer surface comprise the outer surface of the first outer ring, the outer surface of the second outer ring, the first connecting hole and the second connecting hole);
2) Quenching, tempering and magnetic powder inspection are sequentially carried out on the contact part of the first outer ring and the roller assembly and the contact part of the second outer ring and the roller assembly;
3) Finish machining is carried out on the inner and outer surfaces of the first outer ring and the second outer ring respectively, and the contact surfaces of the first outer ring and the second outer ring can be completely and tightly attached;
4) Machining a threaded hole of the first outer ring and a third mounting hole of the second outer ring respectively, and machining bottom holes of a first pin shaft hole of the first outer ring and a second pin shaft hole of the second outer ring;
5) The threaded holes and the third mounting holes are connected with each other through connecting bolts so as to realize that the first outer ring and the second outer ring are connected to form an outer ring assembly, and the outer ring assembly is placed on processing equipment to finish the first pin shaft hole and the second pin shaft hole, so that the coaxiality and the accuracy consistency of the first pin shaft hole and the second pin shaft hole are ensured; meanwhile, other parts (such as threaded holes and the like) can be processed one by one according to the structure of the outer ring assembly;
6) After the first pin shaft hole and the second pin shaft hole are connected through the pin shaft, the first mounting hole and the second mounting hole are processed, so that coaxiality and accuracy consistency of the first mounting hole and the second mounting hole are ensured;
7) And removing the pin shaft and the connecting bolt, and respectively performing deburring treatment on the first outer ring and the second outer ring.
Preferably, when the first mounting hole and the second mounting hole are drilled, the first outer ring and the second outer ring are drilled from one end of the first outer ring to the direction of the second outer ring, so that the problem that the first outer ring and the second outer ring are mutually offset is prevented (because the connecting bolt and the pin shaft are connected from the second outer ring to the direction of the first outer ring, when the first mounting hole and the second mounting hole are drilled, the first outer ring and the second outer ring are drilled from one end of the first outer ring to the direction of the second outer ring, so that the relative stability between the first outer ring and the second outer ring is facilitated).
The above description is only of the preferred embodiments of the present application and is not intended to limit the present application, but various modifications and variations can be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (7)
1. The processing method of the main bearing outer ring assembly of the heading machine is characterized in that the main bearing of the heading machine comprises an outer ring assembly, an inner ring assembly and a roller assembly;
the outer ring assembly comprises a first outer ring and a second outer ring which are arranged in parallel with the central axis; the first outer ring is provided with a first connecting hole, a first mounting hole, a threaded hole and a first pin shaft hole, and the first connecting hole is arranged along the central axis of the first outer ring in a penetrating way; the first mounting hole, the threaded hole and the first pin shaft hole are respectively provided with a plurality of mounting holes distributed along the central axis of the first outer ring; the second outer ring is provided with a second connecting hole, a second mounting hole, a third mounting hole and a second pin shaft hole, and the second connecting hole is arranged in a penetrating manner along the central axis of the second outer ring; the second mounting hole, the third mounting hole and the second pin shaft hole are respectively provided with a plurality of mounting holes distributed along the central axis of the second outer ring, and are respectively arranged in one-to-one correspondence with the first mounting hole, the threaded hole and the first pin shaft hole;
the first connecting hole and the second connecting hole form a mounting cavity for mounting a roller assembly and an inner ring, and the roller assembly is arranged between the outer ring assembly and the inner ring;
the method comprises the following steps:
1) Respectively processing the outer surface of the first outer ring, the outer surface of the second outer ring, the first connecting hole and the second connecting hole;
2) Processing the threaded part of the first connecting hole of the first outer ring and the through hole part of the second connecting hole of the second outer ring respectively;
3) Connecting the threaded hole and the third mounting hole with each other by adopting a connecting bolt;
4) Machining a first pin shaft hole of the first outer ring and a second pin shaft hole of the second outer ring;
5) The first pin shaft hole and the second pin shaft hole are connected with each other by adopting a pin shaft;
6) And processing the first mounting hole of the first outer ring and the second mounting hole of the second outer ring.
2. The method according to claim 1, wherein the outer surface of the first outer ring and the outer surface of the second outer ring are subjected to rough machining, surface treatment, and finish machining.
3. The method according to claim 2, wherein the surface treatment includes quenching, tempering, and magnetic particle inspection of a portion of the first outer ring in contact with the roller assembly and a portion of the second outer ring in contact with the roller assembly.
4. The method according to claim 2, wherein the first mounting hole and the second mounting hole are machined from one end of the first outer ring in a direction toward the second outer ring.
5. The method of claim 1, wherein the first pin bore and the second pin bore are each configured as a tapered structure.
6. The method according to claim 5, wherein the contact portion of the inner wall surface of the first connecting hole with the inner ring and the contact portion of the inner wall surface of the second connecting hole with the inner ring are matched in shape with the contact surface of the inner ring.
7. The method of claim 6, wherein the roller assembly comprises a main thrust roller, an auxiliary thrust roller, and a radial roller, the outer surface of the main thrust roller being disposed in contact with both the inner wall of the first outer race and the outer wall of the inner race; the outer surface of the auxiliary pushing roller is simultaneously contacted with the inner wall of the second outer ring and the outer wall of the inner ring; the outer surface of the radial roller is contacted with the inner wall of the first outer ring and the outer wall of the inner ring at the same time, and one end surface of the radial roller is contacted with the end surface of the second outer ring;
the central axes of the main pushing roller and the auxiliary pushing roller are arranged in parallel, and the central axes of the radial rollers and the central axes of the main pushing rollers are arranged in a mutually perpendicular mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111515649.3A CN114135576B (en) | 2021-12-13 | 2021-12-13 | Main bearing of heading machine and processing method of main bearing outer ring assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111515649.3A CN114135576B (en) | 2021-12-13 | 2021-12-13 | Main bearing of heading machine and processing method of main bearing outer ring assembly |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114135576A CN114135576A (en) | 2022-03-04 |
| CN114135576B true CN114135576B (en) | 2023-10-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111515649.3A Active CN114135576B (en) | 2021-12-13 | 2021-12-13 | Main bearing of heading machine and processing method of main bearing outer ring assembly |
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| CN (1) | CN114135576B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114962459B (en) * | 2022-06-30 | 2023-12-15 | 中国铁建股份有限公司 | Main bearing of heading machine and matching processing method of outer ring raceway surface of main bearing of heading machine and thin-wall ring piece |
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