Rigid rotor dynamic balance obtaining method

A technology of a rigid rotor and an acquisition method, which is applied in the field of acquiring the dynamic balance of the rigid rotor, can solve the problems of low accuracy, inability to accurately judge the accurate value, affecting the service life of the machine, work efficiency and operator safety, etc. Effects of machine vibration, improved accuracy, and shortened development time

Inactive Publication Date: 2013-08-21
SHANGHAI UNIV OF ENG SCI
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Problems solved by technology

[0003] Dynamic balance is an important index in rotor design and processing, and an important parameter to determine the vibration of the rotor. At present, the sliced ​​technology is often used in engineering to obtain the dynamic balance of the rotor. This technology ca

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Embodiment Construction

[0026] In order to make the technical means, creative features, goals and effects of the present invention easy to understand, the present invention will be further described below in conjunction with specific illustrations.

[0027] Such as figure 2 As shown, it is a flow chart of the method for obtaining the dynamic balance of the rigid rotor in the present invention. Concrete steps of the present invention are as follows:

[0028] Step 1: Divide the rotor into grid units and decompose into a finite number of unit entities. It can be divided by HyPermesh software, or can be divided by ICEMCFD, GAMBIT, Truegrid and other software. The solid model of the crankshaft is imported through the software interface, and the deformed points imported after geometry cleaning and part of the surface are repaired, and then the grid is divided. The grid unit adopts Solid20 unit.

[0029] Step 2: Extract the mass characteristic data of each grid unit. Extract with finite element analysi...

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Abstract

The invention belongs to the technical field of rotor design, and provides a rigid rotor dynamic balance obtaining method. The method includes the following steps: (1) an entity model of a rotor part is divided into grids and decomposed into a limited number of unit entities, (2) quality characteristic data of each grid unit are extracted, (3) a dynamic unbalance value of a rotor is obtained, and (4) a dynamic balance result of the rigid rotor is obtained. The method effectively overcomes the defect that obtaining of rigid rotor dynamic balance is not accurate, dynamic balance obtained in the method plays a significant role in the rotor design, vibration of machines can be effectively reduced, so service life of the machines is prolonged, work efficiency is improved, and operation is safe.

Description

technical field [0001] The invention belongs to the technical field of rotor design, in particular to a method for obtaining dynamic balance of a rigid rotor. Background technique [0002] The inertial force or moment of inertia of the rotor's dynamic unbalanced mass is one of the main causes of vibration in rotating machinery. To eliminate or reduce the vibration of the machine, the main method considered first is to balance the rotor to limit the vibration of the machine within the allowable range. [0003] Dynamic balance is an important indicator in rotor design and processing, and an important parameter to determine the vibration of the rotor. At present, the sliced ​​technology is often used in engineering to obtain the dynamic balance of the rotor. This technology can approximate the dynamic unbalance of the rotor. However, due to It cannot accurately judge the exact value of the centroid of each slice, so the accuracy is not high, which directly affects the service ...

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Application Information

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IPC IPC(8): G01M1/14
Inventor 张报建刘淑梅李名尧石然然康博李晓霞刘雅辉于秋华毛苹宇范秋雪
Owner SHANGHAI UNIV OF ENG SCI
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