Computing method for aero-engine barycenter

A technology of aero-engine and calculation method, applied in the field of aero-engine to achieve the effect of strong universality

Active Publication Date: 2017-01-25
SHENYANG JIANZHU UNIVERSITY
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Problems solved by technology

Although most of the accessories are relatively small in mass and volume, since the engine contains dozens of accessories, the cumulative error caused by the accessorie

Method used

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  • Computing method for aero-engine barycenter
  • Computing method for aero-engine barycenter
  • Computing method for aero-engine barycenter

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Example Embodiment

[0026] Attached Figure 1-3 To explain this embodiment, the calculation method of the aero-engine centroid of this embodiment is based on the homogeneous coordinate transformation method and the resultant moment theorem. The calculation is carried out in the following steps:

[0027] a. Establish the component local coordinate system σ 2 Relative to the relative coordinate system σ 3 Transformation matrix

[0028] a11. Establish the main coordinate system σ of the engine at the position of the main engine installation section 1 =[O 1 ; X 1 ,y 1 ,z 1 ];

[0029] a12. Determine the local coordinate system σ of the component according to the component quality characteristics file 2 =[O 2 ; X 2 ,y 2 ,z 2 ];

[0030] a13. Over the local coordinate system σ 2 Origin O 2 Establish the principal coordinate system σ 1 Relative coordinate system σ of each axis in the same direction 3 =[O 3 ; X 3 ,y 3 ,z 3 ], coordinate system σ 2 And σ 3 The angles corresponding to each axis are α, β, γ;

[003...

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Abstract

The invention discloses a computing method for aero-engine barycenter. The method has the advantages of high computing precision, high universality, convenience, quickness, and the like. According to the technical scheme provided by the invention, the computing method for aero-engine barycenter mainly comprises the following steps: a) establishing a transformation matrix of a local coordinate system of a component relative to a relative coordinate system; b) establishing the transformation matrix of the local coordinate system of the component relative to a main coordinate system; c) acquiring engine barycenter. The method provided by the invention has the advantages: 1) the barycenter parameter of the whole engine can be accurately calculated and the operations, including designing the hoisting and transporting assembly, assembling the whole engine, and the like, can become convenient; 2) the method has ultrahigh universality and can be used for computing the barycenter parameter of any part; 3) the method provided by the invention has same reference significance for other rotary machinery.

Description

technical field [0001] The invention relates to the field of aero-engines, in particular to a method for calculating the centroid of an aero-engine. Background technique [0002] The center of mass of an aero-engine is an important characteristic parameter of the engine, and an important technical index that affects the design of engine hoisting and transportation equipment. At present, the calculation of the center of mass of the engine is usually classified according to the structural characteristics of the parts and the angular position of the installation: the fan, the intermediate casing, the compressor, the combustion chamber, the turbine and other main components with axisymmetric characteristics and the axis of rotation coincide with the axis of the engine Classify them into one category; classify oil tanks, fuel oil radiators, transfer gearboxes and other accessories with non-axisymmetric features and angular positions that are not fixed into another category. For ...

Claims

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Application Information

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IPC IPC(8): G01M1/12
CPCG01M1/122
Inventor 金路雷雨恒
Owner SHENYANG JIANZHU UNIVERSITY
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