CN114714081B - Decomposition method for decomposing front bearing seat casing - Google Patents
Decomposition method for decomposing front bearing seat casing Download PDFInfo
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- CN114714081B CN114714081B CN202210412108.6A CN202210412108A CN114714081B CN 114714081 B CN114714081 B CN 114714081B CN 202210412108 A CN202210412108 A CN 202210412108A CN 114714081 B CN114714081 B CN 114714081B
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- front bearing
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- pressure compressor
- bearing seat
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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
- B23P21/00—Machines for assembling a multiplicity of different parts to compose units, with or without preceding or subsequent working of such parts, e.g. with programme control
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Abstract
The invention discloses a tool and a method for disassembling a front bearing seat casing, which belong to the field of maintenance of aero-engines.
Description
Technical Field
The invention belongs to the field of maintenance of aero-engines, and particularly relates to a tool and a method for disassembling a front bearing seat casing.
Background
When the engine is subjected to oil leakage and troubleshooting because of a front bearing cavity, a front bearing seat casing needs to be separated from the engine so as to check and troubleshoot a front bearing sealing part, and the conventional decomposition process is carried out in reverse order from outside to inside and from back to front, namely, firstly separating external pipelines, cables, accessories and the like, then separating high-speed and auxiliary gear box components, then separating high-pressure components of the engine, and finally decomposing low-pressure components until the front bearing seat casing is separated. Namely, the engine needs to be decomposed from the state of the whole engine to the state that all parts are independent. The technical scheme of decomposing according to the conventional procedure has the problems of deep decomposition degree, long troubleshooting period, high repair cost and the like.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide a tool and a method for disassembling a front bearing seat casing, so as to solve the problems of deep disassembly degree, long troubleshooting period, high repair cost and the like in the disassembly process scheme in the prior art.
In order to achieve the purpose, the invention adopts the following technical scheme to realize the purpose:
the invention discloses a tool for disassembling a front bearing seat casing, which comprises a supporting rod, a sliding adapter and a supporting plate, wherein the supporting rod is connected with the sliding adapter through a bolt; one end of the supporting rod is rigidly connected with the oil sliding pipe, the lower part of the other end of the supporting rod is matched with the jack adapter, and the sliding adapter is sleeved on the supporting rod in a clearance fit manner and is fixed on the front bearing seat; the bearing plate is fixed on the mounting edge of the casing of the low-pressure compressor, and the middle part of the bearing plate is matched with the front sealing piece of the rotor of the low-pressure compressor.
Preferably, the bearing plate comprises a connecting part arranged on the outer edge and a semicircular bearing surface arranged in the middle, the semicircular bearing surface is matched with the front sealing part of the low-pressure compressor rotor, and the connecting part is fixed on the mounting edge of the low-pressure compressor casing.
The invention also discloses a tool decomposition method based on the front bearing seat casing decomposition, which comprises the following steps:
the method comprises the following steps: dismounting pipelines and other components surrounding and mounted outside the front bearing seat casing;
step two: disassembling a fairing, a front bearing lubricating oil pump and a coupling;
step three: installing a supporting rod and a sliding adapter to enable the jack to bear the weight of the rotor of the low-pressure compressor;
step four: installing a hanging plate above the front bearing seat casing, pulling the front bearing seat casing forwards along the supporting rod by using a hanging hook, and installing a sling on a front shaft neck of a low-pressure compressor rotor;
step five: moving the jack from the front to the rear of the front bearing seat casing, detaching a sling on a front journal of the low-pressure compressor, and detaching the front bearing seat casing;
step six: mounting a bearing plate on the front mounting edge of the casing of the low-pressure compressor, and removing the jack;
step seven: and the front bearing supports the casing to be reassembled after the maintenance work is finished.
Preferably, the engine is vertically placed on the mounting bracket for disassembly.
Preferably, the fairing, the front bearing lubricating oil pump and the coupling are disassembled after the engine is turned from the vertical state to the horizontal state.
Preferably, the support rod is mounted to the front end of the oil supply pipe assembly and fixed, and then the sliding adapter is fitted over the support rod and fixed to the front bearing housing.
Preferably, after the flange connecting bolt of the front bearing seat casing and the low-pressure casing is disassembled, the hanging plate is installed above the front bearing seat casing.
Preferably, the jack adapter is removed from the front end of the support bar and reattached to the rear end of the support bar, leaving the jack under the weight of the low pressure compressor rotor.
Preferably, the hook is used to continue pulling the front bearing housing forward along the support bar until disassembly.
Preferably, the bearing plate is bolted to the front mounting edge of the low pressure compressor case.
Compared with the prior art, the invention has the following beneficial effects:
the invention discloses a tool for disassembling a front bearing seat casing, which comprises a supporting rod, a sliding adapter and a supporting plate, wherein the supporting rod is connected with the sliding adapter through a bolt; the supporting rod solves the problem that the low-pressure compressor rotor lacks a front-end support after the front bearing supporting casing is disassembled, the supporting rod is rigidly connected with a slide oil pipe arranged in a hollow space of the low-pressure compressor shaft in a mode of rear end face positioning and bolt fixing, and the problem of the front-end support of the low-pressure compressor rotor is solved in a mode of switching a jack at the lower part of the rod after the supporting rod is arranged; due to the existence of the radial clearance of the rotor support bearing of the low-pressure compressor, in order to ensure the centering property between the support rod and the front support bearing after the support rod is installed, a sliding adapter is designed on the support rod in a matched manner, and the adapter is required to be in small clearance fit with the support rod in the radial direction in size design, so that the limiting effect in the height direction is provided when the support rod is installed, and the centering property requirement between the support rod and the front support bearing after the support rod is installed is ensured; the front bearing support casing needs a certain period for carrying out related maintenance work, and a support plate is designed for ensuring the safety and reliability of engine storage.
Compared with the prior art, the method for decomposing the front bearing seat casing disclosed by the invention has the advantages that the process scheme that the front bearing seat casing is decomposed from the front end of the engine in the state of the whole machine achieves the aim of quickly reaching a fault part to carry out maintenance work, reduces the decomposition depth of the engine during maintenance, and has strong operability, high efficiency and safety; because the decomposition depth is greatly reduced during the maintenance of the failed engine, the purposes of saving labor cost and time cost are achieved, and the cost of maintenance and replacement of related components caused by a large amount of decomposition is avoided.
Furthermore, the engine is vertically placed on the assembling frame to be disassembled in the step one, so that the engine can be conveniently separated from the pipeline and other components around and installed outside the front bearing seat casing.
Furthermore, the fairing, the front bearing lubricating oil pump and the coupling are disassembled after the engine is turned over from the vertical state to the horizontal state, so that the front bearing seat casing can be taken down from the front end.
Drawings
FIG. 1 is a schematic diagram of an engine;
FIG. 2 is a schematic view of a support rod;
FIG. 3 is a schematic view of a sliding adapter;
FIG. 4 is a schematic view of a support plate construction;
FIG. 5 is a schematic view of the present invention before the front end of the engine is separated from the front bearing housing;
FIG. 6 is a schematic view of the present invention taken from the front end of the engine and separated from the front bearing housing.
Wherein: 1-a fairing cap; 2-an air inlet casing; 3-hanging the plate; 4-a sliding adapter; 5-a support rod; 6-jack adapter; 7-a support plate; 8-bolt.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
The invention is described in further detail below with reference to the accompanying drawings:
referring to fig. 1, in order to improve the troubleshooting efficiency of the engine, shorten the repair period, reduce the repair cost, optimize and improve the decomposition process scheme, a decomposition scheme for quickly reaching a fault part to perform the repair work is researched, namely, a process method for separating the front bearing seat casing from the front end of the aircraft engine in the complete machine state is only needed to separate two parts, namely a fairing 1 and an air inlet casing 2, shown in fig. 1 from the front end of the engine in the complete machine state.
The invention aims to provide a technical scheme for disassembling a front bearing seat casing from the front end of the whole engine.
The technical scheme is as follows:
1) A support bar 5 as shown in fig. 2 is designed.
If the front bearing support casing is separated from the front end, the problem of how to continuously provide auxiliary front support for the low-pressure compressor rotor is firstly considered in the implementation process of the whole process scheme.
In order to solve the problem that the low-pressure compressor rotor lacks a front end support after the front bearing support casing is disassembled, a support rod 5 shown in figure 2 is designed by combining the structural characteristics of the engine. The supporting rod 5 is connected with a sliding oil pipe arranged in an inner hole of a front shaft of the low-pressure compressor by 3 bolts through the rear mounting edge.
One end of the supporting rod 5 is a connecting part, a threaded through hole is formed in the connecting part, an inner hole is formed in the other end of the supporting rod 5 along the axis, the supporting rod 5 is rigidly connected with a sliding oil pipe arranged in the inner hole of the shaft of the low-pressure compressor in a rear end face connecting part positioning and bolt fixing mode, and the problem of front end supporting of the rotor of the low-pressure compressor is solved in a mode that a jack is connected to the lower portion of the supporting rod 5 in a switching mode after the supporting rod 5 is installed. The support bar 5 is mounted as shown in figure 5.
2) A sliding adapter 4 as shown in fig. 3 is designed.
Because of the existence of the radial play of the rotor supporting bearing of the low-pressure compressor, in order to ensure the alignment of the supporting rod 5 and the front supporting bearing after installation, a sliding adapter 4 is designed on the supporting rod in a matching way, a through hole is formed in the sliding adapter 4 along the axis, a groove matched with the front bearing seat is formed in the bottom end of the sliding adapter 4, a threaded through hole is further formed in the sliding adapter 4, the sliding adapter 4 is in small-gap fit with the supporting rod 5, and is sleeved on the supporting rod 5 during use and then is fixed on the front bearing seat through bolts.
The supporting rod 5 is rigidly connected with the rotor of the low-pressure compressor, the sliding adapter 4 is rigidly connected with the front bearing seat, and the sliding adapter 4 is required to be in small clearance fit with the supporting rod 5 in the radial direction in the size design, so that the limiting effect in the height direction is provided for the mounting of the supporting rod 5, and the requirement on the alignment between the mounted supporting rod 5 and the front supporting bearing is ensured. The sliding adapter 4 is mounted as shown in fig. 5.
3) A support plate 7 as shown in fig. 4 is designed.
A certain period is needed for developing related maintenance work of a lower front bearing supporting casing, in order to ensure the safety and reliability of engine storage, a supporting plate 7 for supporting a low-pressure compressor rotor is designed as shown in figure 4, the outer edge of the supporting plate 7 is a connecting part, a through hole for bolt connection is formed in the connecting part, the middle of the supporting plate 7 is a semicircular supporting surface, the connecting part is fixed on the mounting edge of the low-pressure compressor casing through bolts, and the semicircular supporting surface is matched with a front sealing part of the low-pressure compressor rotor to realize the reliable supporting of the low-pressure compressor rotor. The support plate 7 is mounted as shown in fig. 6.
The detailed decomposition process scheme is as follows:
1) The engine is vertically placed on the assembly frame and is divided into a pipeline and other components which surround and are arranged outside the front bearing seat casing.
2) The engine is turned over from a vertical state to a horizontal state, the fairing and the front bearing lubricating oil pump are separated, the bolt for fixing the front bearing lubricating oil pump coupler is loosened, and the coupler is detached from the lubricating oil supply pipe.
3) As shown in fig. 5, a support bar 5 of the low pressure compressor rotor is mounted to the front end of the oil feed pipe assembly and fixed with bolts, and then a sliding adapter 4 is fitted over the support bar 5 and fixed with bolts to the front bearing housing. The jack adapter 6 is placed under the front of the support rod 5 so that the jack bears the weight of the low pressure compressor rotor.
4) Bolts are connected between the front bearing seat casing and the flange edge of the low-pressure casing, a hanging plate 3 is installed above the front bearing seat casing, the front bearing seat casing is pulled forwards along a supporting rod 5 by a hanging hook, so that a sling can be installed on a front shaft neck of a low-pressure compressor rotor through a gap between the front bearing seat casing and the low-pressure compressor casing and can bear the weight of the low-pressure compressor rotor.
5) The jack adapter 6 is taken down from the front end of the support rod 5, the jack adapter 6 is re-installed at the rear end of the support rod 5, namely, the jack is moved from the front to the rear of the casing of the front bearing seat, so that the jack bears the weight of the rotor of the low-pressure compressor, and the sling on the front journal of the low-pressure compressor is detached. The hook is used to continue pulling the front bearing block casing forward along the support bar until it is dropped.
6) As shown in fig. 6, the low-pressure rotor front journal bearing plate is mounted on the front mounting edge of the low-pressure compressor casing by using bolts 8 to bear the weight of the low-pressure compressor rotor, and the jack is removed from the support rod 5.
7) And after the maintenance work of the front bearing support casing is finished, the front bearing support casing is reassembled according to the decomposition reverse sequence.
The above contents are only for illustrating the technical idea of the present invention, and the protection scope of the present invention should not be limited thereby, and any modification made on the basis of the technical idea proposed by the present invention falls within the protection scope of the claims of the present invention.
Claims (8)
1. The utility model provides a decompose method of front axle bearing frame machine casket which characterized in that adopts specific frock, specific frock includes: a support rod (5), a sliding adapter (4) and a support plate (7); one end of a supporting rod (5) is rigidly connected with the oil slide pipe, the lower part of the other end of the supporting rod is matched with a jack adapter (6), and a sliding adapter (4) is sleeved on the supporting rod (5) in a clearance fit manner and is fixed on a front bearing seat; the bearing plate (7) is fixed on the mounting edge of the casing of the low-pressure compressor, and the middle part of the bearing plate (7) is matched with the front sealing piece of the rotor of the low-pressure compressor; the bearing plate (7) comprises a connecting part arranged at the outer edge and a semicircular bearing surface arranged at the middle part, the semicircular bearing surface is matched with a front sealing part of a low-pressure compressor rotor, and the connecting part is fixed on the mounting edge of a low-pressure compressor casing;
the decomposition method comprises the following steps:
the method comprises the following steps: dismounting pipelines and other components surrounding and mounted outside the front bearing seat casing;
step two: disassembling a fairing, a front bearing lubricating oil pump and a coupling;
step three: mounting a supporting rod (5) and a sliding adapter (4) to enable the jack to bear the weight of the rotor of the low-pressure compressor;
step four: a hanging plate (3) is arranged above the front bearing seat casing, the front bearing seat casing is pulled forwards along a supporting rod (5) by a hanging hook, and a sling is arranged on a front shaft neck of a low-pressure compressor rotor;
step five: moving the jack from the front to the rear of the front bearing seat casing, detaching a sling on a front journal of the low-pressure compressor, and detaching the front bearing seat casing;
step six: mounting a bearing plate (7) on the front mounting edge of the low-pressure compressor casing, and removing the jack;
step seven: and the front bearing supports the casing to be reassembled after the maintenance work is finished.
2. The method of claim 1, wherein in step one, the engine is vertically placed on a mounting bracket for disassembly.
3. The method for disassembling the front bearing seat casing according to claim 1, wherein in the second step, the fairing, the front bearing lubricating oil pump and the coupling are disassembled after the engine is turned over from a vertical state to a horizontal state.
4. The method for disassembling a front bearing housing casing according to claim 1, wherein in the third step, a support rod (5) is installed to the front end of the oil supply pipe assembly and fixed, and then the sliding adapter (4) is fitted over the support rod (5) and fixed to the front bearing housing.
5. The method as claimed in claim 1, wherein in the fourth step, after the front bearing housing and the low pressure housing are disassembled, the hanging plate is installed above the front bearing housing.
6. A method of disassembling a front bearing housing according to claim 1, wherein in step five, the jack adapter (6) is removed from the front end of the support bar (5), and the jack adapter (6) is reattached to the rear end of the support bar (5) to bear the weight of the low pressure compressor rotor.
7. A method of disassembling a front bearing housing according to claim 1, characterized in that in step five, the front bearing housing is pulled forward along the support bar (5) using the hook until disassembly.
8. The method of claim 1, wherein in step six, the support plate (7) is bolted to the front mounting edge of the low pressure compressor casing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210412108.6A CN114714081B (en) | 2022-04-19 | 2022-04-19 | Decomposition method for decomposing front bearing seat casing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210412108.6A CN114714081B (en) | 2022-04-19 | 2022-04-19 | Decomposition method for decomposing front bearing seat casing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114714081A CN114714081A (en) | 2022-07-08 |
| CN114714081B true CN114714081B (en) | 2023-01-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210412108.6A Active CN114714081B (en) | 2022-04-19 | 2022-04-19 | Decomposition method for decomposing front bearing seat casing |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3313475A (en) * | 1965-07-29 | 1967-04-11 | Gen Electric | Mounting of hardware on axial flow compressor casings |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205057476U (en) * | 2015-10-27 | 2016-03-02 | 沈阳黎明航空发动机(集团)有限责任公司 | Engine horizontal dismouting device of quick -witted casket that admits air |
| US10953501B2 (en) * | 2018-07-25 | 2021-03-23 | Raytheon Technologies Corporation | Method of removing bearing compartment |
| CN109648288B (en) * | 2018-12-18 | 2021-03-12 | 中国航发沈阳发动机研究所 | Aeroengine low pressure turbine installation device |
| CN210173466U (en) * | 2019-07-04 | 2020-03-24 | 山东太古飞机工程有限公司 | Auxiliary tool for jet removal of tail of aircraft engine |
| CN112743312B (en) * | 2019-10-31 | 2022-02-25 | 中国航发商用航空发动机有限责任公司 | Disassembling device and disassembling method for engine case |
| CN211028927U (en) * | 2019-11-29 | 2020-07-17 | 青岛中科国晟动力科技有限公司 | Horizontal assembly and disassembly support frame for engine |
| CN111761556B (en) * | 2020-07-06 | 2022-12-16 | 中国航发沈阳发动机研究所 | Air inlet casing disassembling tool |
| CN112719831B (en) * | 2020-12-21 | 2022-04-15 | 中国人民解放军第五七一九工厂 | Tool for in-situ replacement of air inlet casing of aircraft engine and replacement method |
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2022
- 2022-04-19 CN CN202210412108.6A patent/CN114714081B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3313475A (en) * | 1965-07-29 | 1967-04-11 | Gen Electric | Mounting of hardware on axial flow compressor casings |
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| CN114714081A (en) | 2022-07-08 |
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