CN109117581B - Helicopter transmission shaft installation coaxiality digital simulation optimization method - Google Patents
Helicopter transmission shaft installation coaxiality digital simulation optimization method Download PDFInfo
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- CN109117581B CN109117581B CN201811008932.5A CN201811008932A CN109117581B CN 109117581 B CN109117581 B CN 109117581B CN 201811008932 A CN201811008932 A CN 201811008932A CN 109117581 B CN109117581 B CN 109117581B
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- transmission shaft
- speed reducer
- reducer
- intersection point
- coaxiality
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/10—Geometric CAD
- G06F30/17—Mechanical parametric or variational design
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
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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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
Abstract
The invention belongs to a helicopter assembly technology, and relates to a digital simulation optimization method for the installation coaxiality of a helicopter transmission shaft. The transmission system of the helicopter comprises a main speed reducer, a middle speed reducer, six sections of transmission shafts and corresponding transmission shaft supports, and the coaxiality requirements of two adjacent shafts among an output shaft of the main speed reducer, the six sections of transmission shafts and an input shaft of the middle speed reducer are ensured by adjusting the positions of the transmission shaft supports. The invention realizes the digital simulation of the spatial position of the multi-section transmission shaft, realizes the virtual calculation analysis of the spatial coaxiality, realizes the coordination precision and optimization of the spatial installation and greatly improves the installation accuracy of the transmission shaft.
Description
Technical Field
The invention belongs to a helicopter assembly technology, and relates to a digital simulation optimization method for the installation coaxiality of a helicopter transmission shaft.
Background
The existing calculation method of the measurement means can only realize the calculation and adjustment of the installation deviation of the two-dimensional plane of the transmission shaft, and cannot realize the tolerance distribution of the space coaxiality of the multi-section transmission shaft by analyzing the installation angle deviation of the butted two-section transmission shaft on a certain installation plane.
Disclosure of Invention
The purpose of the invention is: the method is characterized in that in the process of installing and adjusting the helicopter transmission shaft, the installation deviation of the transmission shaft is optimized and calculated, the analog measurement of the coaxiality of the multi-section transmission shaft is realized, and the influence of the error of a machine body structure manufacturing system on the installation precision of the transmission shaft is eliminated.
The technical scheme of the invention is as follows: a helicopter transmission shaft installation coaxiality digital simulation optimization method is characterized in that a transmission system of a helicopter comprises a main speed reducer, a middle speed reducer, six sections of transmission shafts and corresponding transmission shaft supports, and the coaxiality requirements of two adjacent shafts among a main speed reducer output shaft, the six sections of transmission shafts and a middle speed reducer input shaft are ensured by adjusting the positions of the transmission shaft supports; the method comprises the following steps:
step one, in CATIA software, constructing a theoretical position part of a transmission shaft assembly model through a point line, wherein the theoretical position part comprises a main reducer mounting surface and a middle reducer mounting surface, and the central positions of a main reducer plane and a middle reducer plane are represented by points on the planes; the position of the transmission shaft support mounting surface is shown by a plane.
And secondly, measuring the intersection point of the axis of the output shaft of the main speed reducer on the mounting surface of the middle speed reducer by using an optical telescope, and constructing the axis of the output shaft of the main speed reducer and the intersection points of the axis of the output shaft of the main speed reducer and the mounting surfaces of the support seats of each transmission shaft in the transmission shaft assembly model.
And step three, measuring the intersection point of the axis of the input shaft of the intermediate speed reducer on the mounting surface of the main speed reducer by using an optical telescope, and constructing the axis of the input shaft of the intermediate speed reducer and the intersection point of the axis of the input shaft of the intermediate speed reducer and the mounting surface of each transmission shaft support in a transmission shaft assembly model.
And step four, constructing an intersection point of a straight line connection main reducer output axis and an intersection point of a middle reducer input axis on each transmission shaft support mounting surface in the transmission shaft assembly model.
And step five, selecting a point on the straight line in the step four to serve as an intersection point of the actual installation positions of the transmission shaft support. And connecting the center position of a main speed reducer, the intersection point of the actual installation positions of all the transmission shaft supports and the center position of the middle speed reducer in the transmission shaft assembly model, wherein the actual installation positions are the actual installation positions of the helicopter transmission system.
And step six, calculating the actual installation coaxiality of each section of transmission shaft by utilizing the self measurement function of CATIA software in the transmission shaft assembly model, and if the actual installation coaxiality of each section of transmission shaft does not meet the requirement, adjusting the position relation of the intersection point of the actual installation position of the transmission shaft support on the straight line in the step four until the coaxiality of each section of transmission shaft meets the adjustment requirement.
And step seven, calculating the deviation of the coordinate value of the actual mounting position intersection point of the transmission shaft support optimized in the step six and the theoretical coordinate value, and taking the deviation as data for adjusting the position of the onboard mounting intersection point.
The invention has the advantages that: the helicopter transmission shaft installation coaxiality digital simulation optimization method realizes digital simulation of the spatial position of the multi-section transmission shaft, realizes virtual calculation analysis of spatial coaxiality, realizes coordination precision and optimization of spatial installation, and greatly improves the installation accuracy of the transmission shaft.
Drawings
FIG. 1 is a perspective view of a propeller shaft assembly model according to the present invention;
FIG. 2 is a schematic view of the drive shaft support mounting surface position in a model according to the present invention;
the method comprises the following steps of 1-theoretical installation surface and central position point of a main speed reducer, 2-theoretical installation surface and central position point of a middle speed reducer, 3-position plane of installation surface of each transmission shaft support, L1-step two straight line, L2-step three straight line, L3, L4-actual installation position of transmission shafts on two sides of the transmission shaft support plane, L5-step four straight line, a-step two intersection point, b-step three intersection point and c-actual installation position intersection point of the transmission shaft support.
Detailed Description
The following description will further describe the embodiments of the present invention with reference to the drawings.
Referring to fig. 1 and 2, a helicopter transmission shaft installation coaxiality digital simulation optimization method of the invention includes a main reducer, a middle reducer, six sections of transmission shafts and corresponding transmission shaft supports, and the coaxiality requirements of two adjacent shafts among an output shaft of the main reducer, the six sections of transmission shafts and an input shaft of the middle reducer are ensured by adjusting the positions of the transmission shaft supports; the method comprises the following steps:
step one, in CATIA software, constructing a theoretical position part of a transmission shaft assembly model through a dotted line, wherein the theoretical position part comprises a main reducer mounting surface and a main reducer central position point, and is shown as a surface 1 in figure 1; the mid-retarder mounting surface and the mid-retarder center point, as shown at plane 2 in FIG. 1; the drive shaft support mounting surface position is shown as plane 3 in fig. 1.
And secondly, measuring the intersection point of the axis of the output shaft of the main reducer on the mounting surface of the middle reducer by using an optical telescope, and constructing the axis of the output shaft of the main reducer in a transmission shaft assembly model, wherein the intersection point is shown as a line L1 in figure 2, and the intersection point of the axis of the output shaft of the main reducer and the mounting surface of each transmission shaft support is shown as a line a in figure 2.
And step three, measuring the intersection point of the axis of the input shaft of the middle speed reducer on the mounting surface of the main speed reducer by using an optical telescope, and constructing the axis of the input shaft of the middle speed reducer in a transmission shaft assembly model, as shown by a line L2 in figure 2, and the intersection point of the axis of the input shaft of the middle speed reducer and the mounting surface of each transmission shaft support, as shown by a line b in figure 2.
And fourthly, constructing an intersection point of the straight line connection of the output axis of the main reducer and the input axis of the intermediate reducer on each transmission shaft support mounting surface in the transmission shaft assembly model, wherein the intersection point is shown as a line L5 in the figure 2.
And step five, selecting a point on the straight line of the step four, and using the point as an actual installation position intersection point of the transmission shaft support as shown by a point c in the figure 2. And connecting the center position of a main speed reducer, the intersection point of the actual installation positions of all the transmission shaft supports and the center position of the intermediate speed reducer in the transmission shaft assembly model, namely the actual installation position of the helicopter transmission system, as shown by lines L3 and L4 in the figure 2.
And step six, calculating the actual installation coaxiality of each section of the transmission shaft, namely the angle of the line L3 and the line L4 in the transmission shaft assembly model by utilizing the self measurement function of CATIA software in the transmission shaft assembly model. If the angle does not meet the requirement, the position relation of the point c on the line L5 in the figure 2 is adjusted until the angles of the line L3 and the line L4 in the transmission shaft assembly model meet the adjustment requirement.
And step seven, calculating the deviation of the coordinate value of the actual mounting position intersection point of the transmission shaft support optimized in the step six and the theoretical coordinate value, and taking the deviation as data for adjusting the position of the onboard mounting intersection point.
After the helicopter with the SA model is applied to the invention, the coaxiality measurement data of the transmission shaft is accurate and credible, the position of the transmission shaft of the airplane is truly reflected, and the manufacturing level and the production rate of the airplane are improved. After the method is applied in the development process of the SH model helicopter, the coaxiality measurement data of the transmission shaft is accurate and credible, the position of the transmission shaft of the airplane is truly reflected, and the smooth completion of the development of the airplane is ensured.
Claims (1)
1. A helicopter transmission shaft installation coaxiality digital simulation optimization method is characterized in that a transmission system of a helicopter comprises a main speed reducer, a middle speed reducer, six sections of transmission shafts and corresponding transmission shaft supports, and the coaxiality requirements of two adjacent shafts among an output shaft of the main speed reducer, the six sections of transmission shafts and an input shaft of the middle speed reducer are ensured by adjusting the positions of the transmission shaft supports; characterized in that the method comprises the following steps:
step one, in CATIA software, constructing a theoretical position part of a transmission shaft assembly model through a point line, wherein the theoretical position part comprises a main reducer mounting surface and a middle reducer mounting surface, and the central positions of a main reducer plane and a middle reducer plane are represented by points on the planes; the position of the mounting surface of the transmission shaft support is expressed by a plane;
measuring the intersection point of the axis of the output shaft of the main reducer on the mounting surface of the middle reducer by using an optical telescope, and constructing the axis of the output shaft of the main reducer and the intersection points of the axis of the output shaft of the main reducer and the mounting surfaces of the support seats of each transmission shaft in a transmission shaft assembly model;
step three, utilizing the intersection point of the axis of the input shaft of the speed reducer in the measurement of the optical telescope on the mounting surface of the main speed reducer, and constructing the axis of the input shaft of the middle speed reducer and the intersection point of the axis of the input shaft of the middle speed reducer and the mounting surface of each transmission shaft support in a transmission shaft assembly model;
step four, constructing an intersection point of a straight line connecting the output axis of the main speed reducer and the input axis of the middle speed reducer on each transmission shaft support mounting surface in the transmission shaft assembly model;
selecting a point on the straight line in the step four to serve as an intersection point of the actual installation position of the transmission shaft support; connecting the center position of a main speed reducer, the intersection point of the actual installation positions of all the transmission shaft supports and the center position of a middle speed reducer in a transmission shaft assembly model, wherein the actual installation positions are the actual installation positions of the helicopter transmission system;
step six, calculating the actual installation coaxiality of each section of transmission shaft by utilizing the self measurement function of CATIA software in a transmission shaft assembly model, and if the actual installation coaxiality of each section of transmission shaft does not meet the requirement, adjusting the position relation of the intersection point of the actual installation position of the transmission shaft support on the straight line in the step four until the coaxiality of each section of transmission shaft meets the adjustment requirement;
and step seven, calculating the deviation of the coordinate value of the actual mounting position intersection point of the transmission shaft support optimized in the step six from the theoretical coordinate value, and using the deviation as the data for adjusting the position of the onboard mounting intersection point.
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| CN201811008932.5A CN109117581B (en) | 2018-08-30 | 2018-08-30 | Helicopter transmission shaft installation coaxiality digital simulation optimization method |
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| CN201811008932.5A CN109117581B (en) | 2018-08-30 | 2018-08-30 | Helicopter transmission shaft installation coaxiality digital simulation optimization method |
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