CN112935788A - Butt joint guiding device of unit body with long shaft and technological method - Google Patents
Butt joint guiding device of unit body with long shaft and technological method Download PDFInfo
- Publication number
- CN112935788A CN112935788A CN201911257671.5A CN201911257671A CN112935788A CN 112935788 A CN112935788 A CN 112935788A CN 201911257671 A CN201911257671 A CN 201911257671A CN 112935788 A CN112935788 A CN 112935788A
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- unit body
- shaft
- rollers
- long shaft
- butt joint
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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
- B23P19/00—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes
- B23P19/10—Aligning parts to be fitted together
- B23P19/12—Alignment of parts for insertion into bores
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
Abstract
The invention provides a butt joint guiding device and a process method of a unit body with a long shaft, wherein the butt joint guiding device can be used for avoiding the occurrence of a head hanging phenomenon and butt joint the unit body to another unit body with a deep hole, the butt joint guiding device comprises a rear end clamping mechanism, the rear end clamping mechanism is used for realizing multi-degree-of-freedom posture adjustment of the unit body, and in the butt joint guiding device, a virtual shaft is used for being connected with the front end of the long shaft of the unit body and is in sliding fit with the inner structure of the deep hole to form front end support for the virtual shaft; the auxiliary centering device is arranged on the inlet side of the deep hole and comprises three rollers, the three rollers can be rotatably arranged, and a cylinder tangent to the three rollers defines a moving channel of the long shaft; and the radial runout monitoring device is used for monitoring the radial runout of the three rollers.
Description
Technical Field
The invention relates to a butt joint guiding device of a unit body with a long shaft and a process method.
Background
The main structure of an aircraft engine of one type comprises a fan unit body, a core machine unit body and a low-pressure turbine unit body, and has the characteristics of complex structure, large size, high precision, heavy weight and the like. The low-pressure turbine unit body comprises a low-pressure turbine shaft, a low-pressure turbine rotor, a low-pressure turbine casing and the like, and the weight is concentrated on the rear end, namely the low-pressure turbine rotor and the casing end. The low-pressure turbine unit is 800kg in weight, the low-pressure turbine shaft is 2000mm in length, the front end of the low-pressure turbine unit is connected with a fan shaft through a spline and is positioned in an engine, the double short spigots are matched, and the matching between the spigots is 0-0.067mm of clearance and 0-0.057mm of clearance respectively; the sealing clearance between the rear sealing labyrinth on the rear side of the low-pressure turbine shaft and the rear sealing assembly is 0.2-0.276 mm, and the fit clearance between the front sealing labyrinth of the low-pressure turbine rotor and the sealing assembly of the interstage casing is 0.2-0.28 mm.
In the whole engine assembling process, the low-pressure turbine unit bodies are assembled in a horizontal butt joint mode, as shown in fig. 1, the low-pressure turbine unit bodies are clamped by the rear-end clamping structure along a fixed track to realize butt joint and assembly of the low-pressure turbine unit bodies, the low-pressure turbine unit bodies can be adjusted in multiple degrees of freedom by the rear-end clamping structure, the low-pressure turbine unit bodies are long in span, large in weight and inclined to the rear side in gravity center, the phenomenon of hanging-down easily occurs in the horizontal assembling process, in addition, the fit clearance is small, once the phenomenon of hanging-down occurs, the scraping and collision among parts is easily caused, and the parts are. In addition, the low-pressure turbine unit body is assembled through deep blind holes, the contact part is invisible, an operator cannot acquire the actual state of the contact part, the posture of the low-pressure turbine unit body is adjusted according to the contact state, and interference among parts is eliminated.
Disclosure of Invention
An object of the present invention is to provide a docking guide device for a unit body having a long axis, which can be used to prevent a drooping phenomenon from occurring.
It is another object of the present invention to provide a butt joint guiding process for a unit body having a long axis, which can effectively prevent a sagging phenomenon.
In order to achieve the purpose, the butt joint guide device of the unit body with the long shaft is used for butt joint of the unit body to another unit body with a deep hole, and comprises a rear end clamping mechanism which is used for achieving multi-degree-of-freedom posture adjustment of the unit body; the auxiliary centering device is arranged on the inlet side of the deep hole and comprises three rollers, the three rollers can be rotatably arranged, and a cylinder tangent to the three rollers defines a moving channel of the long shaft; and the radial runout monitoring device is used for monitoring the radial runout of the three rollers.
In one or more embodiments of the docking guide device, the auxiliary centering device further includes a fixing base having a groove, three spaced sliding grooves are respectively provided at circumferential sides of the groove, and a support pillar bracket having a positioning rib corresponding to the sliding groove, the support pillar bracket being positioned on the fixing base by means of the positioning rib being engaged with the sliding groove and being fixed by a fastener; the support column support is provided with the rotatable roller and the radial run-out monitoring device.
In one or more embodiments of the docking guidance device, the radial run-out monitoring device is a dial indicator.
In one or more embodiments of the docking guide, the roller is a roller having an axis disposed parallel to an axis of the long shaft.
In one or more embodiments of the docking guiding apparatus, the unit body having the long axis is a low pressure turbine unit body, and the other unit body is a combination of a core unit body and a fan unit body.
In order to achieve the above object, a docking guide process of a unit body having a long axis includes any one of the docking guide apparatuses, including:
mounting the assembled secondary centering device to an inlet side of the deep hole of the other unit;
mounting the virtual shaft to a front end of the long shaft;
mounting a radial runout monitoring device to the auxiliary centering device for monitoring radial runout of the roller;
moving the unit body having the long axis in an axial direction so that the long axis passes through the auxiliary centering device;
the low-pressure turbine unit body is prevented from drooping under the support and guide of the auxiliary centering device, and the posture of the unit body with the long shaft is adjusted through the readings of the three radial runout monitoring devices, so that the long shaft is aligned with the axis of the deep hole;
after the virtual shaft is contacted with the inner structure of the deep hole, the auxiliary centering device is removed;
and continuously pushing the unit body with the long shaft along the axial direction, guiding the long shaft into the hole structure under the centering and guiding of the virtual shaft, and then completing the installation of the unit body with the long shaft.
The technical scheme has the following beneficial effects:
by adding the virtual shaft in front of the long shaft, the virtual shaft and the structure in the hole form a front end support, so that the unit body with the long shaft is prevented from hanging down, and the unit body is guided to be assembled;
by adding the auxiliary support at the rear end and adopting a three-roller centering mode, the effective support is formed from the front end of the long shaft, so that the unit body with the long shaft is prevented from hanging;
through the mode that the gyro wheel supported, reduce the long axis and the frictional force of supplementary centring means to reduce the unit body and assemble resistance, easily the assembly of long axis.
Drawings
The above and other features, properties and advantages of the present invention will become more apparent from the following description of the embodiments with reference to the accompanying drawings, in which:
fig. 1 is a schematic view of a low pressure turbine unit body rear end clamping mechanism.
Fig. 2 is a perspective view of a low pressure turbine unit body installed horizontally.
Fig. 3 is a schematic front view of a low pressure turbine unit body installed horizontally.
Fig. 4 is a partially enlarged schematic view at a in fig. 3.
Fig. 5 is a perspective view of the auxiliary centering device.
Fig. 6 is a front view of the auxiliary centering device.
Fig. 7 is a perspective view of the auxiliary centering device with one of the rollers removed.
Fig. 8 is a front view of the auxiliary centering device with one of the rollers removed.
FIG. 9 is a partial sectional view taken along A-A in FIG. 8.
Detailed Description
The following discloses many different embodiments or examples for implementing the subject technology described. Specific examples of components and arrangements are described below to simplify the present disclosure, but these are merely examples and do not limit the scope of the invention. For example, if a first feature is formed over or on a second feature described later in the specification, this may include embodiments in which the first and second features are formed in direct contact, and may also include embodiments in which additional features are formed between the first and second features, such that the first and second features may not be in direct contact. Additionally, reference numerals and/or letters may be repeated among the various examples throughout this disclosure. This repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. Further, when a first element is described as being coupled or coupled to a second element, the description includes embodiments in which the first and second elements are directly coupled or coupled to each other, as well as embodiments in which one or more additional intervening elements are added to indirectly couple or couple the first and second elements to each other.
In the embodiments described later, the unit body having the long axis is exemplified by a low pressure turbine unit body, and the other unit body is exemplified by a combination of a core unit body and a fan unit body.
As shown in fig. 1, the low-pressure turbine unit body 1 has a turbine shaft 11, and the turbine shaft 11 has a front end 110. The turbine shaft 11 is rotatable in the direction RX, the low-pressure turbine unit 1 is held by the rear-end holding mechanism 2, and the coordinate system XYZ of the rear-end holding mechanism 2 has degrees of freedom in the directions RX1 and X1. In another embodiment, the system also has other degrees of freedom in other directions, and the configuration with adjustable postures of the degrees of freedom can be determined according to actual requirements.
As shown in fig. 2, the low pressure turbine unit body 1 is to be butt-guided into a combination of the core unit body 2 and the fan unit body 3, which has a deep hole into which the turbine shaft 11 of the low pressure turbine unit body 1 is inserted. As shown in fig. 4, an internal bore structure is provided in the fan unit body 3, i.e. a support section 310 is provided in the fan stub shaft 31, which support section 310 serves to support the turbine shaft 11 guided into position.
With continued reference to fig. 2, the docking guiding device comprises an auxiliary centering device 4 and, as shown with reference to fig. 3 and 4, a virtual shaft 5, the virtual shaft 5 being connected to the front end 110 of the turbine shaft 11. The auxiliary centering device 4 is installed on the inter-stage casing 21 of the core unit body, i.e., corresponding to the inlet side of the deep hole. A virtual shaft is added in front of the low-pressure turbine shaft, and the virtual shaft and a short shaft of the fan form a front end support, so that the low-vortex unit body is prevented from hanging down, and the low-vortex unit body is guided to be assembled. By adding the auxiliary support at the rear end of the interstage casing and adopting a three-column centering mode, the effective support is formed from the front end of the low-pressure turbine unit body, and the low-pressure turbine unit body is prevented from hanging.
As shown in fig. 5 and 6, the auxiliary centering device 4 comprises three rollers 43, and the circle which is commonly circumscribed by the three rollers 43 defines a moving passage of the turbine shaft 11, i.e. a moving passage through which the virtual shaft 5 and the turbine shaft 11 are to be guided, and during the guiding movement, the axes of the virtual shaft 5 and the turbine shaft 11 are ensured to be located on a set axis.
The radial runout monitoring device is used for monitoring runout of the three rollers 43, if the runout is within a set error range, the axial line of the virtual shaft 5 and the axial line of the turbine shaft 11 are located on a set axial line, otherwise, if the runout is too large, the posture of the low-pressure turbine unit body 1 is adjusted through the rear-end clamping mechanism, and the adjustment is carried out according to the direction of reducing the runout, so that the guide butt joint can be carried out continuously. The radial run-out monitoring device is illustrated in fig. 5 to 9 as a dial indicator.
As will be understood from the method described later, the auxiliary centering device 4 and the dummy shaft 5 may not simultaneously perform the guiding and supporting functions, and after the dummy shaft 5 is in contact with the support segment 310 to form the support, the auxiliary centering device 4 may be removed, and the dummy shaft 5 may be guided and supported by the support segment 310, thereby guiding and supporting the turbine shaft 11.
As shown in fig. 5 to 9, the auxiliary centering device 4 further includes a fixed seat 41 and a support column bracket 42, the fixed seat 41 has a groove 411, three spaced sliding grooves 410 are respectively provided at circumferential sides of the groove 411, the support column bracket 42 has a positioning rib 420 corresponding to the sliding grooves, and the support column bracket 42 is positioned on the fixed seat 41 by means of a positioning surface 444 between the positioning rib 420 and the sliding grooves 410, and is fixed by a fastener. The support post holder 42 is provided with a rotatable roller 43 and a radial run-out monitoring device 45.
Three roller assemblies of the auxiliary centering device can slide along the radial direction, and when the auxiliary centering device is dismounted, the three support column brackets 42 only need to slide outwards and can be dismounted quickly after being separated from the low-pressure turbine shaft.
The dial indicator is arranged on the auxiliary centering device, the radial runout change of the centering roller is monitored, the actual central position of the low-pressure turbine shaft is identified, and then the attitude of the low-pressure turbine unit body is adjusted through the actual central position of the low-pressure turbine shaft, so that the interference between parts is eliminated.
Through the mode that the gyro wheel supported, reduce the low-pressure turbine shaft and the frictional force of auxiliary stay device to reduce low-pressure turbine unit body assembly resistance, easily low-pressure turbine shaft assembly.
As shown in fig. 5 and 6, the roller 43 is a roller whose axis is arranged parallel to the axis of the long shaft.
With reference to fig. 1 to 9, the implementation process of the guided docking process method is as follows:
1. as shown in fig. 5 and 6, a roller 43 is mounted on the bracket 42 and fixed by a connecting pin 44 to form a roller assembly;
2. mounting the three assembled roller assemblies into the sliding grooves of the fixing base 41, as shown in fig. 7 to 9;
3. the roller assembly is pushed inwards along the radial direction, so that the positioning surface 444 of the bracket 42 is attached to the sliding groove positioning surface of the fixing seat 41, and the roller assembly is fixed through the bolt 46 to form an auxiliary centering device;
4. mounting the assembled secondary centering device to an interstage casing on an engine core unit block, as shown in fig. 2, 3 and 4;
5. mounting the virtual shaft 7 to the low pressure turbine shaft head;
6. installing a dial indicator on the bracket 2, and monitoring the radial deviation of the roller through the reading of the dial indicator;
7. as shown in fig. 1, starting the device to drive the low-pressure turbine unit body to move axially and butt joint with the rest parts of the engine;
8. the low-pressure turbine unit body is supported and guided by the auxiliary centering device, the phenomenon that the low-pressure turbine unit body hangs down can be effectively avoided, and the posture of the low-pressure turbine shaft unit body is adjusted through the reading of three dial indicators, so that the low-pressure turbine unit body is aligned with the axes of other parts of the engine;
9. after the virtual shaft is contacted with the supporting section of the short shaft of the fan, as shown in fig. 3, the fixing bolt 6 of the roller assembly is loosened, and the roller assembly is pushed out of the chute along the radial direction, and then the auxiliary centering device is removed from the interstage casing;
10. and continuously pushing the low-pressure turbine unit body along the axial direction, and finishing the installation of the low-pressure turbine unit body under the centering and guiding of the virtual shaft 7.
Through the description of the foregoing embodiments, it can be understood that the foregoing embodiments have the following beneficial effects:
1. the horizontal installation resistance of the low-pressure turbine unit body is reduced, the assembly centering quality of the low-pressure turbine unit body is improved, and the assembly quality and efficiency are improved;
2. the phenomenon of the low-pressure turbine unit body hanging head is effectively reduced, and the scraping risk in the assembling process of the low-pressure turbine unit body is reduced;
3. the auxiliary centering device has simple structure, low manufacturing cost and easy operation.
Although the present invention has been disclosed in terms of the preferred embodiment, it is not intended to limit the invention, and variations and modifications may be made by one skilled in the art without departing from the spirit and scope of the invention. Therefore, any modification, equivalent change and modification of the above embodiments according to the technical essence of the present invention are within the protection scope defined by the claims of the present invention, unless the technical essence of the present invention departs from the content of the present invention.
Claims (6)
1. The butt joint guiding device of the unit body with the long axis is used for butt joint the unit body to another unit body with a deep hole, the butt joint guiding device comprises a rear end clamping mechanism, and the rear end clamping mechanism is used for realizing multi-degree-of-freedom posture adjustment of the unit body, and is characterized by further comprising:
the virtual shaft is used for being connected with the front end of the long shaft of the unit body and is in sliding fit with the inner structure of the deep hole to form front end support for the virtual shaft;
the auxiliary centering device is arranged on the inlet side of the deep hole and comprises three rollers, the three rollers can be rotatably arranged, and a cylinder tangent to the three rollers defines a moving channel of the long shaft; and
and the radial runout monitoring device is used for monitoring the radial runout of the three rollers.
2. The docking guide of claim 1, wherein the auxiliary centering device further comprises a fixing base having a groove, three spaced slide grooves are provided at circumferential sides of the groove, respectively, a support pillar bracket having a positioning rib corresponding to the slide grooves, the support pillar bracket being positioned on the fixing base by means of the positioning rib being engaged with the slide grooves and being fixed by a fastening member; the support column support is provided with the rotatable roller and the radial run-out monitoring device.
3. A docking guide according to claim 1 wherein the radial run-out monitoring means is a dial gauge.
4. A docking guide according to claim 1 wherein said rollers are rollers having axes disposed parallel to the axis of said long shaft.
5. The docking guide apparatus of claim 1, wherein the unit body having the long axis is a low pressure turbine unit body, and the other unit body is a combination of a core unit body and a fan unit body.
6. A butt-joint guiding process method of a unit body having a long axis, using the butt-joint guiding apparatus according to any one of claims 1 to 5, characterized by comprising:
mounting the assembled secondary centering device to an inlet side of the deep hole of the other unit;
mounting the virtual shaft to a front end of the long shaft;
mounting a radial runout monitoring device to the auxiliary centering device for monitoring radial runout of the roller;
moving the unit body having the long axis in an axial direction so that the long axis passes through the auxiliary centering device;
the low-pressure turbine unit body is prevented from drooping under the support and guide of the auxiliary centering device, and the posture of the unit body with the long shaft is adjusted through the readings of the three radial runout monitoring devices, so that the long shaft is aligned with the axis of the deep hole;
after the virtual shaft is contacted with the inner structure of the deep hole, the auxiliary centering device is removed;
and continuously pushing the unit body with the long shaft along the axial direction, guiding the long shaft into the hole structure under the centering and guiding of the virtual shaft, and then completing the installation of the unit body with the long shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911257671.5A CN112935788B (en) | 2019-12-10 | 2019-12-10 | Butt joint guiding device of unit body with long shaft and technological method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911257671.5A CN112935788B (en) | 2019-12-10 | 2019-12-10 | Butt joint guiding device of unit body with long shaft and technological method |
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| Publication Number | Publication Date |
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| CN112935788A true CN112935788A (en) | 2021-06-11 |
| CN112935788B CN112935788B (en) | 2022-08-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911257671.5A Active CN112935788B (en) | 2019-12-10 | 2019-12-10 | Butt joint guiding device of unit body with long shaft and technological method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115319438A (en) * | 2021-07-20 | 2022-11-11 | 无锡航亚科技股份有限公司 | Method for assembling elastic buckle connection type grate disc and turbine disc |
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| Publication number | Publication date |
|---|---|
| CN112935788B (en) | 2022-08-19 |
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