CN103776367B - Aero-engine multi-shaft rotor assembling method and device based on genetic algorithm optimization - Google Patents
Aero-engine multi-shaft rotor assembling method and device based on genetic algorithm optimization Download PDFInfo
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- CN103776367B CN103776367B CN201410051543.6A CN201410051543A CN103776367B CN 103776367 B CN103776367 B CN 103776367B CN 201410051543 A CN201410051543 A CN 201410051543A CN 103776367 B CN103776367 B CN 103776367B
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Abstract
The invention discloses an aero-engine multi-shaft rotor assembling method and device based on genetic algorithm optimization, and belongs to the mechanical assembling technology. A measurement method and device determine a rotation standard based on a pneumatic-magnetic combined rotation shaft system; angle positioning of a rotary platform is determined according to an inductosyn, a radial error of a rotor radial assembling surface and an inclination error of an axial assembling surface are extracted based on a four-measurement-head measuring device, and the influence weight of each rotor on the coaxiality of all the assembled rotors is obtained; all the rotors needing by assembly are measured respectively, and the influence weight of each rotor on the coaxiality of all the assembled rotors is obtained; vector optimization is carried out on the weights of all the rotors, and the assembling angle of each rotor is obtained. The aero-engine multi-shaft rotor assembling method and device based on genetic algorithm optimization can effectively resolve the problem that the coaxiality is low after the rotors of an aero-engine are assembled, and has the advantages that the coaxiality is high after the rotors are assembled, vibration is reduced, installation is easy, flexibility is high, and the performance of the aero-engine is improved.
Description
Technical field
The invention belongs to mechanical assembly technique, relate generally to a kind of aeromotor multiaxis rotor assembling method based on genetic algorithm optimizing and device.
Background technology
Aeromotor assembling is the final tache in aeromotor manufacture process, is also one of of paramount importance manufacture link.Under existing Aeroengine Design scheme and process technology level conditions, the quality of assembling and work efficiency have material impact for the quality of engine, performance and production efficiency.So the right alignment of installing rear rotor will be improved in assembling process as much as possible, and then reduce the vibration of aeromotor, improve the performance of aeromotor.But, in reality is produced, the assembling of aeromotor is complete manual setting, height and operating experience and the technical merit of whether stablizing the assembler that places one's entire reliance upon of assembly precision, lack a kind of method that high speed effectively instructs aeroengine rotor to assemble, and then raising efficiency of assembling, reduce aeroplane engine machine vibration, improve the performance of aeromotor.
Along with aeromotor assembling measuring technology more and more comes into one's own, aeromotor assembling measuring technology more and more comes into one's own, and becomes the focus of research.Increasing researchist has carried out deep discussion for aeroengine rotor, and Rools-Royce proposes a kind of scheme (System and method for improving the damage tolerance of a rotor assembly.European Patent Publication No: EP2525049A2), mainly through each sub-test macro being obtained the stress signal of rotor each position, the signal that each subsystem gathers is analyzed by main system, damage the impact of Parameter analysis on assembling from the appearance of each rotor, and then improve the assembling of aeroengine rotor.The method Problems existing is: the impact of geometric sense on assembling, on the impact of assembling, cannot be improved in the geometric sense aspect not analyzing rotor.
Xi'an Communications University proposes a kind of method for testing assembly performance of rotor of aircraft engine (a kind of method for testing assembly performance of rotor of aircraft engine.Publication number: CN101799354A).First the method adopts vibrator exciting aeroengine rotor, utilizes vibration transducer and signal acquiring system software to obtain the impulse response signal of the aeroengine rotor of a multicarrier coupling; Then adopt dual-tree complex wavelet transform method to analyze to the impulse response signal of the aeroengine rotor of obtained multicarrier coupling, obtain the impulse response subsignal of the aeroengine rotor of eight single carriers; Finally average assembly performance index is extracted to the impulse response subsignal of the aeroengine rotor of obtained eight single carriers, if the average assembly performance desired value of gained is more than or equal to 10, then judge that the assembling of this aeroengine rotor is qualified, if the mean value of gained is less than 10, then judge defective, need to do over again rebuilding.The method Problems existing is: do not instruct aeroengine rotor assembling.
Luoxin Precision Parts (shanghai) Co., Ltd. proposes a kind of right alignment of measuring and equips (a kind of axiality measuring apparatus.Publication number: CN202024752U).This device comprises the transmission main shaft that a pair of being arranged on apparatus subject is rotated by synchronizing linkage synchro control, and this transmission main shaft the inner respectively correspondence is provided with measuring head and positioning reference plane; Above position, there is transducer probe assembly between described measuring head.The right alignment that it mainly solves existing precision component, the measurement of beating.The method Problems existing is: the right alignment only measuring measured piece, does not solve the problem of the rear right alignment difference of rotor assembling.
Liming Aeroplane Engine (Group) Co., Ltd., Shenyang City proposes a kind of gap measuring method (non-contact measuring method for leaf apex radial clearance of engine rotor.Publication number: CN102175135A).The method adopts capacitance measurement technology, and measuring process is as follows, first assembles measuring system, calibration sensor, determines the relation between blade tip radial play and voltage, then is fixed on blade by sensor, finally measures engine rotor blade tip radial play.The method Problems existing is: do not consider that in rotor assembling process, axial installed surface is on the impact after rotor assembling.
The tested object of aeromotor assembling is stators and rotor, and under the condition that component processing precision meets the demands, final inspection is by installing the Determines after coordinating, and the index of evaluation mainly assembles the right alignment parameter of rear rotor.Engine rotation produces high pressure, and its rotor is made up of multiple single part combined, ideal during the dead in line of the revolving shaft of each parts and whole engine.High Rotation Speed speed during high-performance enginer work is greater than 10000rpm, single part axis or radial beat will inevitably cause turbine disk misalignment engine rotation axis, very large centrifugal force can be produced in such a situa-tion, cause the imbalance of rotor turns, cause engine luggine, thus ensure that the right alignment after the assembling of each parts is the Focal point and difficult point installed.
A Model Mounting not using right alignment optimization method, the axis of all parts and radial due to machining precision restriction existence beat, eccentric, inclination equal error.If directly assembled randomly, just may form the bending situation being similar to " banana ", namely upper component have accumulated bias or the droop error of all parts below, and beat overall after causing assembling is huge with inclination, cause the non-constant of engine rotor right alignment, be difficult to meet request for utilization.
At present, domestic engine assembly still adopts traditional assembly method, tests manually based on clock gauge.According to assembled in sequence engine from top to bottom, measure after assembling parts, guarantee that the entirety after at every turn increasing parts can meet the threshold condition of right alignment, and then another parts are upwards installed.Each all using previous parts as benchmark, the right alignment of final requirement entirety within the specific limits.The time of this method at substantial, and the possibility of doing over again is large, affects very much efficiency and the one-time success rate of installation, usually once successfully assembles needs 4 to 5 days.And because be not optimum assembling position, usually need dismounting 4 to 5 times, also need workman to assemble with rich experiences, each assembling all needs experience hot-working and cold working.So current aerospace engine assembly method installation effectiveness is low, not easily install, and after assembling, right alignment is poor, affects engine performance.
Summary of the invention
For the deficiency that above-mentioned prior art exists, a kind of aeromotor multiaxis rotor assembling method based on genetic algorithm optimizing and device are proposed, the object assemble the low problem of rear right alignment to solve aeroengine rotor, after reaching rotor assembling, right alignment is high, reduction is vibrated, be easy to installation, flexibility ratio is high, improved engine performance.
The object of the present invention is achieved like this:
A kind of structure of the aeromotor multiaxis rotor assembling apparatus based on genetic algorithm optimizing is that rotary axis system is nested on base central position, described rotary axis system is by rotary main shaft, worktable, platen on revolving shaft, revolving shaft pressing disc, inductosyn scale, inductosyn slide rule, permanent magnet and coil are formed, described worktable to be configured on revolving shaft on platen upper end, on revolving shaft, platen is configured on rotary main shaft upper end, rotary main shaft is configured on revolving shaft pressing disc upper end, inductosyn slide rule is nested on revolving shaft pressing disc outer shroud, inductosyn scale fits over base central position lower inside admittedly, and be positioned at above inductosyn slide rule, permanent magnet is enclosed within rotary main shaft outer shroud, and be fixed on revolving shaft pressing disc upper end, coil is enclosed within rotary main shaft outer shroud, and be fixed on base interior, 5-10cm place above permanent magnet, aligning adjusts the worktable that inclines to be configured on rotary axis system center, and four paws oild chuck is configured in aligning tune and inclines on worktable center, left column and right column are symmetrically distributed in the both sides of rotary axis system and are packed on pedestal, removablely successively from top to bottom on left column be adjustably set with upper left mast web member and lower-left mast web member, the horizontal measuring staff horizontal nest in upper left is on the mast web member of upper left, the horizontal measuring staff of upper sensor adaptor and upper left is connected, and upper axial current vortex sensor and upper sensor adaptor are connected, the horizontal measuring staff horizontal nest in lower-left is on the mast web member of lower-left, and the horizontal measuring staff of lower sensor adaptor and lower-left is connected, and lower axial current vortex sensor and lower sensor adaptor are connected, removablely successively from top to bottom on right column be adjustably set with upper right mast web member and bottom right mast web member, the horizontal measuring staff horizontal nest of upper right is on upper right mast web member, and upper radial current vortex sensor is connected with upper right transverse direction measuring staff, the horizontal measuring staff horizontal nest in bottom right is on the mast web member of bottom right, and the horizontal measuring staff of lower radial current vortex sensor and bottom right is connected.
Compared with prior art, feature of the present invention is:
The present invention can obtain the right alignment weights of each rotor by the concentricity and verticality measuring each rotor, again the right alignment weights of each rotor are carried out vector optimization, just can obtain instructing setting angle, save 40% set-up time and expense, the one-step installation success ratio of 98%, measurable installation progress, improve engine stabilization, reduce engine luggine, save motor fuel consumption, reduce CO
2discharge, reduces engine noise and pollutes.
Accompanying drawing illustrates:
Fig. 1 is four gauge head measurement mechanism structural representations
Fig. 2 is rotary axis system structural representation
Piece number in figure: 1-pedestal, 2-rotary axis system, 2a-rotary main shaft, 2b-worktable, platen on 2c-revolving shaft, 2d-revolving shaft pressing disc, 2e-inductosyn scale, 2f-inductosyn slide rule, 2g-permanent magnet, 2h-coil, 3-aligning adjusts the worktable that inclines, 4-four paws oild chuck, 5a-left column, 5b-right column, the horizontal measuring staff in 6a-lower-left, the horizontal measuring staff in 6b-bottom right, the horizontal measuring staff in 6c-upper left, the horizontal measuring staff of 6d-upper right, 7a-lower-left mast web member, 7b-bottom right mast web member, 7c-upper left mast web member, 7d-upper right mast web member, 8a-lower axial current vortex sensor, 8b-upper axial current vortex sensor, 9a-lower radial current vortex sensor, 9b-upper radial current vortex sensor, 10a-lower sensor adaptor, 10b-upper sensor adaptor.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in further detail:
Based on aeromotor multiaxis rotor assembling method and the device of genetic algorithm optimizing, described method and apparatus is: four paws oild chuck 4 is configured in aligning tune and inclines on worktable 3 center.Left column 5a and right column 5b is symmetrically distributed in the both sides of rotary axis system 2 and is packed on pedestal 1, on left column 5a from top to bottom successively removable be adjustably set with upper left mast web member 7c and lower-left mast web member 7a, upper left horizontal measuring staff 6c horizontal nest is on the mast web member 7c of upper left, upper sensor adaptor 10b and the horizontal measuring staff 6c in upper left is connected, and upper axial current vortex sensor 8b and upper sensor adaptor 10b is connected; Lower-left horizontal measuring staff 6a horizontal nest is on the mast web member 7a of lower-left, and lower sensor adaptor 10a and the horizontal measuring staff 6a in lower-left is connected, and lower axial current vortex sensor 8a and lower sensor adaptor 10a is connected.On right column 5b from top to bottom successively removable be adjustably set with upper right mast web member 7d and bottom right mast web member 7b, upper right horizontal measuring staff 6d horizontal nest is on upper right mast web member 7d, and upper radial current vortex sensor 9b and the horizontal measuring staff 6d of upper right is connected; Bottom right horizontal measuring staff 6b horizontal nest is on the mast web member 7b of bottom right, and lower radial current vortex sensor 9a and the horizontal measuring staff 6b in bottom right is connected.Rotary axis system 2 is nested on pedestal 1 center, described rotary axis system 2 is by rotary main shaft 2a, worktable 2b, platen 2c on revolving shaft, revolving shaft pressing disc 2d, inductosyn scale 2e, inductosyn slide rule 2f, permanent magnet 2g and coil 2h is formed, described worktable 2b to be configured on revolving shaft on platen 2c upper end, on revolving shaft, platen 2c is configured on rotary main shaft 2a upper end, rotary main shaft 2a is configured on revolving shaft pressing disc 2d upper end, inductosyn slide rule 2f is nested on revolving shaft pressing disc 2d outer shroud, inductosyn scale 2e fits over pedestal 1 center lower inside admittedly, and be positioned at above inductosyn slide rule 2f, permanent magnet 2g is enclosed within rotary main shaft 2a outer shroud, and be fixed on revolving shaft pressing disc 2d upper end, coil 2h is enclosed within rotary main shaft 2a outer shroud, and it is inner to be fixed on pedestal 1, 5-10cm place above permanent magnet 2g, rotary axis system 2 drives measured rotor at the uniform velocity to rotate with the speed of 6 ~ 10r/min, lower axial current vortex sensor 8a carries out equal interval sampling on the axial datum clamp face of measured rotor, lower radial current vortex sensor 9a carries out equal interval sampling on the radial datum clamp face of measured rotor, sampling number should meet and often encloses 1000 ~ 2000 points, by the sampled data on the radial datum clamp face of measured rotor by Least Square Circle matching, assess offset, by the axial datum clamp face up-sampling data of measured rotor by least square plane matching, assess tilt quantity, aligning adjusts the worktable 3 that inclines to be configured on rotary axis system 2 center, according to size and the angle of offset, regulates aligning to adjust to incline worktable 3 until the size meeting radial reference face offset is within the scope of 0 ~ 3 μm, according to size and the angle of tilt quantity, regulate aligning to adjust to incline worktable 3 until the size meeting axial reference field tilt quantity is 0 ~ 2 " in scope, upper right mast web member 7d is vertically nested in the upside of right column 5b, upper right horizontal measuring staff 6d horizontal nest is on upper right mast web member 7d, upper radial current vortex sensor 9b and the horizontal measuring staff 6d of upper right is connected, the radial direction that upper radial current vortex sensor 9b measures measured rotor is installed and measured face, upper left mast web member 7c is vertically nested in the upside of left column 5a, upper left horizontal measuring staff 6c horizontal nest is on the mast web member 7c of upper left, upper axial current vortex sensor 8b and upper sensor adaptor 10b is connected, the axis that upper axial current vortex sensor 8b measures measured rotor installs and measures face, rotary axis system 2 at the uniform velocity rotates with the speed of 6 ~ 10r/min, and upper radial current vortex sensor 9b installs and measures equal interval sampling on face in the radial direction of measured rotor, and upper axial current vortex sensor 8b installs and measures equal interval sampling on face in the axis of measured rotor, sampling number should meet and often encloses 1000 ~ 2000 points, the data upper radial current vortex sensor 9b being installed and measured face up-sampling in the radial direction of measured rotor are by Least Square Circle matching and assess concentricity, the data upper axial current vortex sensor 8b being installed and measured face up-sampling in the axis of measured rotor are by least square plane matching and assess verticality, combined axis is to the radius in the face of installing and measuring and this measured rotor and the difference in height of finally assemble rotor, and obtaining this rotor affects weights to the rear rotor coaxial degree of assembling, respectively measure assembling needed for whole rotors, obtain each rotor on assembling after rotor coaxial degree affect weights, adopt genetic algorithm to carry out vector optimization the weights of each rotor, obtain the angle of assembling of each rotor, the account form affecting weights of rotor coaxial degree is:
in formula: C represents that measured rotor radial direction installs and measures the concentricity in face,
represent the radial eccentric angle installing and measuring the matching center of circle, face, H represents measured rotor and the difference in height of finally assembling rotor, R represents the radius axially installing and measuring face, P represents that measured rotor axially installs and measures the verticality in face, and θ represents the angle axially installing and measuring the fit Plane peak place in face.
Claims (1)
1. the aeromotor multiaxis rotor assembling apparatus based on genetic algorithm optimizing, it is characterized in that rotary axis system (2) is nested on pedestal (1) center, described rotary axis system (2) is by rotary main shaft (2a), worktable (2b), platen (2c) on revolving shaft, revolving shaft pressing disc (2d), inductosyn scale (2e), inductosyn slide rule (2f), permanent magnet (2g) and coil (2h) are formed, described worktable (2b) is configured on platen on revolving shaft (2c) upper end, on revolving shaft, platen (2c) is configured on rotary main shaft (2a) upper end, rotary main shaft (2a) is configured on revolving shaft pressing disc (2d) upper end, inductosyn slide rule (2f) is nested on revolving shaft pressing disc (2d) outer shroud, inductosyn scale (2e) fits over pedestal (1) center lower inside admittedly, and be positioned at inductosyn slide rule (2f) top, permanent magnet (2g) is enclosed within rotary main shaft (2a) outer shroud, and be fixed on revolving shaft pressing disc (2d) upper end, coil (2h) is enclosed within rotary main shaft (2a) outer shroud, and it is inner to be fixed on pedestal (1), apart from 5-10cm place, permanent magnet (2g) top, aligning adjusts the worktable (3) that inclines to be configured on rotary axis system (2) center, and four paws oild chuck (4) is configured in aligning tune and inclines on worktable (3) center, left column (5a) and right column (5b) are symmetrically distributed in the both sides of rotary axis system (2) and are packed on pedestal (1), removablely successively from top to bottom on left column (5a) be adjustably set with upper left mast web member (7c) and lower-left mast web member (7a), horizontal measuring staff (6c) horizontal nest in upper left is on upper left mast web member (7c), upper sensor adaptor (10b) is connected with the horizontal measuring staff (6c) in upper left, and upper axial current vortex sensor (8b) and upper sensor adaptor (10b) are connected, horizontal measuring staff (6a) horizontal nest in lower-left is on lower-left mast web member (7a), lower sensor adaptor (10a) is connected with the horizontal measuring staff (6a) in lower-left, and lower axial current vortex sensor (8a) and lower sensor adaptor (10a) are connected, removablely successively from top to bottom on right column (5b) be adjustably set with upper right mast web member (7d) and bottom right mast web member (7b), horizontal measuring staff (6d) horizontal nest of upper right is on upper right mast web member (7d), and upper radial current vortex sensor (9b) is connected with the horizontal measuring staff (6d) of upper right, horizontal measuring staff (6b) horizontal nest in bottom right is on bottom right mast web member (7b), and lower radial current vortex sensor (9a) is connected with the horizontal measuring staff (6b) in bottom right.
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| CN107869963B (en) * | 2017-11-16 | 2020-11-24 | 深圳立仪科技有限公司 | Measuring device |
| CN110969538A (en) * | 2019-12-20 | 2020-04-07 | 哈尔滨工业大学 | Large-scale high-speed rotation equipment blade assembly method based on genetic algorithm |
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| CN1635589A (en) * | 2004-10-22 | 2005-07-06 | 中国工程物理研究院应用电子学研究所 | A concentric assembly method and device for regulating same |
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| US7111407B2 (en) * | 2004-11-30 | 2006-09-26 | Tennessee Valley Authority | Vertical shaft alignment tool |
| US8567060B2 (en) * | 2007-12-27 | 2013-10-29 | Pratt & Whitney Canada Corp. | Gas turbine rotor assembly method |
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| CN1635589A (en) * | 2004-10-22 | 2005-07-06 | 中国工程物理研究院应用电子学研究所 | A concentric assembly method and device for regulating same |
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