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Method for calculating rotor dynamics performance of multi-parallel-axis system

A technology of rotor dynamics and calculation methods, applied in the direction of calculation, special data processing applications, instruments, etc., can solve problems such as can not guarantee normal operation

Inactive Publication Date: 2013-01-16
XI AN JIAOTONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The design of this type of system has been using the design method of rotor design alone in the past, ignoring the coupling relationship between each rotor. This design method can only ensure that each rotor can run stably when it is used alone, but it cannot guarantee normal operation after coupling. run

Method used

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  • Method for calculating rotor dynamics performance of multi-parallel-axis system
  • Method for calculating rotor dynamics performance of multi-parallel-axis system
  • Method for calculating rotor dynamics performance of multi-parallel-axis system

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Embodiment Construction

[0030] The method for calculating the rotor dynamic performance of the present invention comprises the following steps:

[0031] 1) Pre-processing for dynamic analysis of multi-parallel axis system:

[0032] ①Choose calculation objects among compressors, speed reducers, speed increasers, etc., select eigenvalues ​​and forced vibration response calculations or critical speed and instability speed calculations, and at the same time, choose multi-parallel shaft system analysis considering gear coupling or one of them A rotor analysis.

[0033] ② Input the parameters of each rotor and bearing in the system: including shaft section parameters, additional quality parameters, unbalanced quality parameters, gear parameters and bearing type, position and dynamic characteristic coefficients, etc.

[0034] If the eigenvalue and mode shape analysis and unbalanced response analysis at a certain speed are carried out, the speed of the drive shaft (coupling system analysis) or the speed of ...

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Abstract

The invention relates to a method for calculating rotor dynamics performance of a multi-parallel-axis system. The method comprises the steps specifically as follows: step (1), selecting an analysis object and a calculation type, inputting parameters of a bearing-rotor system, finishing pre-processing operations like discretization of the rotor system; step (2), calling a bearing calculation program, calculating dynamic and static characteristic parameters of each bearing, forming a rotor dynamics equation of a parallel axis system which gives consideration to gear engagement according to the selected analysis object and calculation type; and step (3), calling a solving function to calculate a feature value and a feature vector of a dynamics differential equation, converting the feature value and the feature vector into dynamics characteristic result data through dimension so as to finish calculation and analysis of system stability, critical rotation speed, forced vibration response and vibration mode. According to the method disclosed by the invention, calculation and analysis means for dynamics performance of the multi-parallel-axis system, which can be applied to actual engineering, are developed on the basis of solid theoretical research; the calculated rotor system comprises supports of various types; therefore, combination of bearing calculation and rotor system dynamics analysis is implemented better.

Description

technical field [0001] The invention belongs to the technical field of rotor dynamics, and relates to a calculation method for rotor dynamic performance, in particular to a calculation method for rotor dynamic performance of a multi-parallel shaft system. Background technique [0002] In the gear-coupled bearing-rotor system, multiple shaft systems are connected together through gear coupling. The system has new characteristics caused by gear transmission. After the lateral vibration is transmitted through the gears, the rotor will cause torsional vibration, that is, bending-torsion coupling vibration occurs. Multi-parallel shaft systems with gear meshing are widely used in fans, compressors, speed increasers and other machines. One of the typical applications of the gear-coupled bearing-rotor system is the twin-shaft turbocompressor, also known as the DH turbine. Compressor, its bearing-rotor system such as figure 1 shown. [0003] The meshing effect of the gears connects...

Claims

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Application Information

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IPC IPC(8): G06F19/00
Inventor 朱爱斌丘大谋牛婷张锁怀
Owner XI AN JIAOTONG UNIV
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