CN112476316B - Dismounting device for rear shaft nut of high-pressure turbine rotor of aircraft engine - Google Patents
Dismounting device for rear shaft nut of high-pressure turbine rotor of aircraft engine Download PDFInfo
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- CN112476316B CN112476316B CN202011226400.6A CN202011226400A CN112476316B CN 112476316 B CN112476316 B CN 112476316B CN 202011226400 A CN202011226400 A CN 202011226400A CN 112476316 B CN112476316 B CN 112476316B
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- spline
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- stopping
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
- B25B27/14—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for assembling objects other than by press fit or detaching same
Abstract
The invention belongs to the technical field of assembly of aero-engines, and relates to a device for dismounting a rear shaft nut of a high-pressure turbine rotor of an aero-engine. The method comprises the following steps: the middle part of the lower stop frame is provided with a circular through hole, the outer side of the lower stop frame is bent downwards and flanged outwards, and the flanged outer side of the lower stop frame is provided with an outer flange edge for fixing with an engine stator casing mounting edge; the lower end of the stopping cylinder body is fixedly connected with the outer side of the through hole of the lower stopping frame; the upper stop spline plate is fixedly connected with the upper end of the stop cylinder body, and the head of the upper stop spline plate is provided with an internal spline; the stop end tooth spline block is provided with an external spline and is meshed with the internal spline of the upper stop spline plate through the external spline, the lower end of the stop end tooth spline block is provided with a fan-shaped ring, and the lower part of the fan-shaped ring is provided with end teeth; the nut wrench, the nut wrench cylinder and the little clearance fit of the internal cylinder of locking barrel upper end. The problem of the gland nut dismouting difficulty on certain type engine rotor is solved.
Description
Technical Field
The invention belongs to the technical field of assembly of aero-engines, and particularly relates to a device for disassembling and assembling a rear shaft nut of a high-pressure turbine rotor of an aero-engine.
Background
In the assembly process of an aircraft engine, the compression nut on an engine rotor is difficult to disassemble and assemble generally, and the main difficulty of the assembly and disassembly is that the rotor component needs to be effectively stopped during disassembly and assembly. If the engine rotor part is not stopped, when the compression nut on the engine rotor part is disassembled and assembled, the rotor is impacted and disassembled by utilizing the large mass of the rotor, a bearing supported by the rotor is damaged to a certain extent, the blade tip of the rotor and a casing can be collided and abraded, and the more important point is that the disassembly and assembly torque of the compression nut cannot be accurately controlled, so that certain quality and safety risks exist. The difficulties also exist when the rear shaft nut of the high-pressure turbine rotor is disassembled and assembled in a certain engine complete machine.
Disclosure of Invention
The purpose of the invention is as follows: the utility model provides an aeroengine high pressure turbine rotor rear axle nut dismouting device to solve the problem of the gland nut dismouting difficulty on certain type engine rotor.
The technical scheme is as follows:
in a first aspect, a device for dismounting and mounting a rear shaft nut of a high-pressure turbine rotor of an aircraft engine is provided, which comprises: the engine stator casing mounting structure comprises a lower stop frame 1, wherein a circular through hole is formed in the middle of the lower stop frame 1, the outer side of the lower stop frame is bent downwards and flanged outwards, and an outer flange edge is arranged on the flanged edge of the outer side of the lower stop frame and used for being fixed with a mounting edge of an engine stator casing; the lower end of the stopping cylinder 2 is fixedly connected with the outer side of the through hole of the lower stopping frame 1; the upper stop moving spline plate 3 is fixedly connected with the upper end of the stop cylinder 2, the upper stop moving spline plate 3 comprises a head part and a rod part, and the head part is provided with an internal spline; the stop end tooth spline block 4 is provided with an external spline and is meshed with the internal spline of the upper stop spline plate 3 through the external spline, the lower end of the stop end tooth spline block 4 is provided with a fan-shaped ring, and the lower part of the fan-shaped ring is provided with end teeth; the nut wrench 5, the nut wrench 5 cylinder and the little clearance fit of the internal cylinder of the upper end of the locking barrel 2.
Further, the rod part of the upper stop spline plate 3 is provided with two threaded holes.
Further, the distance between the two threaded holes is smaller than the length of the waist-shaped hole of the torque multiplier.
Furthermore, a circular through hole is formed in the middle of the stop end tooth spline block 4, and the circular through hole is in small clearance fit with the outer cylindrical surface of the input interface of the nut wrench.
Further, two sections of sector holes are formed in the upper end face of the nut wrench 5, the length of each sector hole is larger than that of the sector ring of the stop end tooth spline block 4, the sector ring of the stop end tooth spline block 4 is inserted into the sector hole of the nut wrench 5, and the nut wrench 5 can rotate along the sector ring.
Further, the end teeth at the lower end of the stopping end tooth spline block 4 are meshed with the outer end teeth of the rotor to stop the rotor.
Further, a cylindrical ring is arranged on the inner side of the lower end of the nut wrench 5, and the outer cylindrical surface of the cylindrical ring is matched with the inner cylindrical surface of the rotor shaft neck.
Further, the outer side of the lower end of the nut wrench 5 is provided with teeth which are radially and inwardly protruded and matched with the outer tooth grooves of the rotor rear shaft nut.
Has the advantages that:
according to the dismounting device for the back shaft nut of the high-pressure turbine rotor of the aircraft engine, the stopping moment of the engine rotor is transmitted to the mounting edge of the engine stator casing through the stopping cylinder body 2 and the lower stopping frame 1 in sequence to perform effective stopping by utilizing the end teeth at the lower end of the stopping end tooth spline block 4 through two sector-shaped slotted holes formed in the nut wrench 5. And the external spline of the stop end tooth spline block 4 is matched with the internal spline of the upper stop spline plate 3, so that the spline can be meshed and fixed at any circumferential position. The high-pressure turbine rotor rear shaft nut dismounting device realizes effective locking of the high-pressure turbine rotor, can realize accurate torque fastening of the compression nut on the rotor according to design requirements, and effectively ensures the assembly quality of the engine rotor.
Drawings
Fig. 1 is a front sectional view and a top view of a novel high-pressure turbine rotor rear shaft nut dismounting device according to an embodiment of the invention.
Fig. 2 is a front view and a top cross-sectional view of an upper stop spline plate of a high-pressure turbine rotor rear shaft nut dismounting device according to an embodiment of the present invention.
Fig. 3 is a front view and a top cross-sectional view of a stop end tooth spline block of a high pressure turbine rotor rear axle nut dismounting device according to an embodiment of the present invention.
Fig. 4 is a front view, a left side view and a direction view of a nut runner of the high-pressure turbine rotor rear shaft nut dismounting device according to the embodiment of the invention.
Fig. 5 is an operation schematic diagram of the novel high-pressure turbine rotor rear axle nut dismounting device according to the embodiment of the invention.
The torque multiplier comprises a lower stop frame 1, a stop barrel 2, an upper stop spline plate 3, a stop end tooth spline block 4, a nut wrench 5 and a torque multiplier fixing bolt 6.
Detailed Description
The disassembly of large nuts on aircraft engine rotors is generally difficult to a certain extent, and usually requires that corresponding tooling is manufactured to connect the engine rotor and the stator case together by means of special structures or positions on the rotor structure so as to stop the engine rotor. This situation makes it relatively easy to stop and disassemble the rotor when the stop position on the rotor is outside the large nut (stop position diameter is larger than nut diameter). The tool stop frame is only required to connect and fix the rotor stop position with the engine stator casing, and the nut tool wrench can freely disassemble and assemble the nut without influence; however, when the stopping position on the rotor is on the inner side of the large nut (the diameter of the stopping position is smaller than that of the nut), the rotor is relatively difficult to stop and disassemble under the condition, because the tool stopping frame is used for connecting and fixing the stopping position of the rotor with the engine stator casing, the nut tool wrench must interfere with the tool stopping frame, and the problem that the design of the nut tool wrench and the tool stopping frame is difficult is caused.
The invention uses the end teeth on the rear shaft of the turbine rotor of the engine as the stop position, and the stop of the turbine rotor is realized by fixedly connecting the turbine rotor of the engine and the stator casing of the engine into a whole by using the dismounting device of the invention. The invention discloses a device for dismounting a rear shaft nut of a high-pressure turbine rotor of an aircraft engine, which is shown in figures 1 to 5. The device includes: the engine stator casing mounting structure comprises a lower stop frame 1, wherein a circular through hole is formed in the middle of the lower stop frame 1, the outer side of the lower stop frame is bent downwards and flanged outwards, and an outer flange edge is arranged on the flanged edge of the outer side of the lower stop frame and used for being fixed with a mounting edge of an engine stator casing; the lower end of the stopping cylinder 2 is fixedly connected with the outer side of the through hole of the lower stopping frame 1; the upper stop moving spline plate 3 is fixedly connected with the upper end of the stop cylinder 2, the upper stop moving spline plate 3 comprises a head part and a rod part, and the head part is provided with an internal spline; the stop end tooth spline block 4 is provided with an external spline and is meshed with the internal spline of the upper stop spline plate 3 through the external spline, the lower end of the stop end tooth spline block 4 is provided with a fan-shaped ring, and the lower part of the fan-shaped ring is provided with end teeth; the nut wrench 5, 5 cylinder of nut wrench and the little clearance fit of the internal cylinder of locking barrel 2 upper end. The rod part of the upper stop spline plate 3 is provided with two threaded holes. The distance between the two threaded holes is smaller than the length of the torque multiplier waist-shaped hole. A circular through hole is formed in the middle of the stop end tooth spline block 4 and is in small clearance fit with the outer cylindrical surface of the input interface of the nut wrench. The upper end face of the nut wrench 5 is provided with two sections of sector holes, the length of each sector hole is larger than that of a sector ring of the stop end tooth spline block 4, the sector ring of the stop end tooth spline block 4 is inserted into the sector hole of the nut wrench 5, and the nut wrench 5 can rotate along the sector ring. The end teeth at the lower end of the stop end tooth spline block 4 are engaged with the outer end teeth of the rotor to stop the rotor. The inner side of the lower end of the nut wrench 5 is provided with a cylindrical ring, and the outer cylindrical surface of the cylindrical ring is matched with the inner cylindrical surface of the rotor shaft neck. The outer side of the lower end of the nut wrench 5 is provided with teeth which are radially and inwards protruded and matched with an external tooth groove of a rotor rear shaft nut.
The working principle of the device of the invention is explained below with reference to the accompanying drawings:
the high-pressure turbine rotor rear shaft nut dismounting device comprises a lower stop frame 1, a stop cylinder 2, an upper stop spline plate 3, a stop end tooth spline block 4, a nut wrench 5 and a torque multiplier fixing bolt 6. The lower stop frame 1 is a welded part, the outer flange edge of the lower stop frame is fixed with the mounting edge of the engine stator casing, and the inner flange edge of the lower stop frame is fixed with the stop cylinder 2 by screws. The lower flange edge of the stopping cylinder body 2 is connected with the lower stopping frame 1, and the upper inner cylindrical surface of the stopping cylinder body is matched with the outer cylindrical surface of the nut wrench 5 to play a role in centering and fixing. The flange edge of the upper stop spline plate 3 (shown in figure 2) is fixed with the upper flange edge of the stop cylinder 2 by screws, the inner round hole of the flange edge is of an inner spline structure, the extension plate is provided with two inner threaded holes, and the threaded holes are matched with the torque multiplier fixing bolts 6 to fix the finished torque multiplier. The lower extreme of locking end tooth spline piece 4 (see fig. 3) is provided with the end tooth with the axle head tooth complex behind the engine, and the outer lane face is external spline structure, and this external spline cooperates with the internal spline of last stop spline board 3, plays and can all be fixed in the meshing in arbitrary circumferential position, and the center of locking end tooth spline piece 4 sets up to the round hole, can be with the little former cylindrical surface cooperation centering in upper end of nut spanner 5. The nut wrench 5 (see fig. 4) is provided with a square hole at the center thereof, which is matched with the output interface of the torque multiplier, and two fan-shaped slotted holes are arranged at the circumference thereof, and the fan-shaped slotted holes are used for allowing the end teeth at the lower end of the locking end tooth spline block 4 to extend out to be matched with the end teeth of the rear shaft of the turbine rotor of the engine for locking. The torque multiplier fixing bolt 6 is used to fix the torque multiplier to the upper stop spline plate 3. As shown in fig. 5, the high-pressure turbine rotor rear shaft nut dismounting device uses the end teeth of the engine turbine rotor rear shaft as the stopping position, fixes the turbine rotor rear shaft through the end teeth at the lower end of the stopping end tooth spline block 4, and uses the external spline of the stopping end tooth spline block 4 to be matched with the internal spline of the upper stopping spline plate 3, so that the turbine rotor is transmitted to the mounting edge of the engine stator casing through the stopping cylinder 2 and the lower stopping frame 1 in sequence to be effectively stopped. And the compression nut on the rotor can be fastened by accurate torque according to design requirements, so that the assembly quality of the engine rotor is effectively ensured.
This novel turbine rotor rear axle nut dismouting device has solved the difficult problem of certain type engine turbine rotor rear axle nut decomposition difficulty. The end teeth on the rear shaft of the turbine rotor of the engine are used as stop positions, the turbine rotor of the engine and the stator casing of the engine are fixedly connected into a whole by the dismounting device to realize the stop of the turbine rotor, and the dismounting device is convenient to mount and reliable in stop, so that the dismounting function of the rear shaft nut of the turbine rotor is realized.
Claims (3)
1. The utility model provides an aeroengine high pressure turbine rotor rear axle nut dismouting device which characterized in that includes:
the engine stator casing mounting structure comprises a lower stopping frame (1), wherein a circular through hole is formed in the middle of the lower stopping frame (1), the outer side of the lower stopping frame is bent downwards and turned outwards, and an outer flange edge is arranged on the turned edge of the outer side of the lower stopping frame and used for being fixed with a mounting edge of an engine stator casing;
the lower end of the stopping cylinder (2) is fixedly connected with the outer side of the through hole of the lower stopping frame (1);
the upper stop spline plate (3) is fixedly connected with the upper end of the stop cylinder (2), the upper stop spline plate (3) comprises a head part and a rod part, and the head part is provided with an internal spline;
the rotor locking device comprises a stopping end tooth spline block (4), wherein the stopping end tooth spline block (4) is provided with an external spline and is meshed with an internal spline of an upper stopping end tooth spline plate (3) through the external spline, the lower end of the stopping end tooth spline block (4) is provided with a fan-shaped ring, the lower part of the fan-shaped ring is provided with end teeth, and the end teeth at the lower end of the stopping end tooth spline block (4) are meshed with the outer end teeth of the rotor to stop the rotor;
the nut wrench (5), the little clearance fit of nut wrench (5) cylinder and the internal cylinder in locking barrel (2) upper end, the up end of nut wrench (5) is provided with two sections sector hole, sector hole length is greater than the length of the sector ring of locking end tooth spline piece (4), the sector ring of locking end tooth spline piece (4) inserts the sector hole of nut wrench (5) and nut wrench (5) can rotate along the sector ring, nut wrench (5) lower extreme inboard is provided with the cylinder ring, the cylinder ring outer cylinder cooperates with rotor journal internal cylinder, locking end tooth spline piece (4) middle part is provided with circular through-hole, circular through-hole and the little clearance fit of the input interface external cylinder of nut wrench, nut wrench (5) lower extreme outside is provided with the tooth of radial inward bulge and rotor rear axle nut's external tooth socket complex.
2. Device according to claim 1, characterized in that the stem of the upper stop splined plate (3) is provided with two threaded holes.
3. The device of claim 1, wherein the pitch of the two threaded holes is less than the length of the torque multiplier kidney-shaped hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011226400.6A CN112476316B (en) | 2020-11-05 | 2020-11-05 | Dismounting device for rear shaft nut of high-pressure turbine rotor of aircraft engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011226400.6A CN112476316B (en) | 2020-11-05 | 2020-11-05 | Dismounting device for rear shaft nut of high-pressure turbine rotor of aircraft engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112476316A CN112476316A (en) | 2021-03-12 |
| CN112476316B true CN112476316B (en) | 2022-09-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011226400.6A Active CN112476316B (en) | 2020-11-05 | 2020-11-05 | Dismounting device for rear shaft nut of high-pressure turbine rotor of aircraft engine |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113400254B (en) * | 2021-05-14 | 2023-01-06 | 中国航发哈尔滨东安发动机有限公司 | Thread decomposing device of self-locking mechanism |
| CN113370153B (en) * | 2021-06-30 | 2022-09-30 | 中国航发贵州黎阳航空动力有限公司 | Torque amplification type nut dismounting device |
| CN113386087A (en) * | 2021-07-06 | 2021-09-14 | 中科航星科技有限公司 | Nut dismouting frock before space engine fan |
| CN114029901A (en) * | 2021-11-10 | 2022-02-11 | 中国航发南方工业有限公司 | Tool and method for assembling rotor of gas generator of aircraft engine |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5772373A (en) * | 1994-11-02 | 1998-06-30 | Warn Industries, Inc. | Nut and locking device |
| CN104440779B (en) * | 2014-11-07 | 2016-07-13 | 沈阳黎明航空发动机(集团)有限责任公司 | A kind of engine rotor and stator tighten stop device and the using method thereof of part |
| CN209774503U (en) * | 2019-04-30 | 2019-12-13 | 九州云箭(北京)空间科技有限公司 | Liquid rocket engine turbopump assembly shafting arresting gear |
| CN110653736B (en) * | 2019-08-30 | 2021-09-28 | 中国航发动力股份有限公司 | Rotary rotor and stator accurate positioning device and method for bearing large axial load |
| CN210588042U (en) * | 2019-09-18 | 2020-05-22 | 中国航发商用航空发动机有限责任公司 | Device for screwing nut of main shaft of aircraft engine |
| CN211541057U (en) * | 2019-11-28 | 2020-09-22 | 中国航发商用航空发动机有限责任公司 | Ring piece dismounting tool and vortex reducer dismounting tool |
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| CN112476316A (en) | 2021-03-12 |
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