Shafting dynamic and static characteristic analysis calculating system of large steam turbine generator unit

A steam turbine generator set, characteristic analysis technology, applied in the direction of calculation, electrical digital data processing, special data processing applications, etc., can solve the problems of low work efficiency, low accuracy of calculation results, etc., achieve scientific layout, shorten the learning cycle, Reasonably divided effect

Active Publication Date: 2015-02-25
HARBIN TURBINE +1
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention aims to solve the problems of low calculation result accuracy and low work efficiency of the existing calculation

Method used

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  • Shafting dynamic and static characteristic analysis calculating system of large steam turbine generator unit
  • Shafting dynamic and static characteristic analysis calculating system of large steam turbine generator unit
  • Shafting dynamic and static characteristic analysis calculating system of large steam turbine generator unit

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specific Embodiment approach 1

[0038] Specific implementation mode 1: The basic structure diagram of the RDC system in this implementation mode is as follows figure 1 Shown: Analysis and calculation system for dynamic and static characteristics of shafting of large turbogenerator set, which includes:

[0039] Modeling modules for building rotor mechanics models;

[0040] It is used to call the rotor mechanics model data of the modeling module and the bearing load and elevation data of the static analysis module, and then calculate the steady-state data and dynamic coefficient of the bearing under constant temperature and variable temperature according to the Reynolds equation, and store the dynamic coefficient of the bearing analysis module;

[0041] A dynamic analysis module used to call the rotor mechanics model data of the modeling module, the shaft load data of the static analysis module and the dynamic coefficient of the bearing analysis module, and analyze the critical speed of the rotor, unbalance r...

specific Embodiment approach 2

[0050] Embodiment 2: This embodiment differs from Embodiment 1 in that: the rotor mechanics model is established by splicing building blocks with equivalent stiffness diameter and shaft section mass.

[0051] After the creation process starts, the system provides a default shaft segment, and the user can build a complete rotor mechanics model by adding new shaft segments or bearings forward and backward with the default shaft segment as the starting point.

[0052] The modeling operation of the rotor model in the RDC system is mainly completed by two parts: the model editing display area of ​​the main interface of the RDC system and the attribute editor of the main interface of the RDC system. During the modeling operation, in addition to the above two areas, the basic operations on the model axis section also need to cooperate with the operations on the modeling toolbar in the menu bar.

[0053] The different states it is in are marked to indicate the user to complete the mod...

specific Embodiment approach 3

[0057] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the modeling module includes an equivalent model establishment sub-module, a load and boundary condition sub-module, and a data format conversion sub-module;

[0058] The sub-module for establishing the equivalent model is used to model the geometric model of the rotor in the form of the length and rigidity diameter of each shaft section of the rotor, and convert it into a mechanical model, and connect the shaft sections together in the form of building blocks, Build the whole rotor, assign the material properties to the mechanical model and determine the bearing position and bearing size;

[0059] Wherein, the stiffness diameter in the equivalent model is calculated using the 45° method, and the specific steps of the method are:

[0060] (1) Draw a 45° line tangent to the guide circle at the abrupt position of the shaft and the impeller;

[0061] (2) The intersection point of two inters...

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Abstract

The invention relates to a shafting dynamic and static characteristic analysis calculating system of a large steam turbine generator unit to solve the problems that an existing computing system is low in computing result precision and working efficiency. The system comprises a modeling module used for establishing a rotor mechanical model; a bearing analysis module used for calling data of the rotor mechanical model of the modeling module and bearing loads and elevation data of a static analysis module, calculating steady state data and the dynamics coefficient of a bearing and storing the dynamics coefficient; a dynamic analysis module used for calling the data of the rotor mechanical model of the modeling module, the shaft load data of the static analysis module and the dynamics coefficient of the bearing analysis module and analyzing the critical rotating speed and the unbalanced response of a rotor and the rotor stability; the static analysis module used for calling the data of the rotor mechanical model of the modeling module and carrying out front calculation through the bearing analysis module and the dynamic analysis module. The shafting dynamic and static characteristic analysis calculating system is applied to the field of large turbines.

Description

technical field [0001] The invention relates to an analysis and calculation system for dynamic and static characteristics of a shaft system of a steam turbine generator set. Background technique [0002] Problems existing in the existing technology: there is still a blank in the domestic field of steam turbine shaft dynamics analysis software. The main reason is that most simple rotor systems are based on classical rotor dynamics theory, and the rotor model is simplified on a large scale. Therefore, The accuracy of calculation results is low; due to the different programming ideas of calculation analysts, similar software lacks relevant industry standards, and the accuracy and calculation efficiency are uneven; Computing type, and the operation interface is often complex and abstract, which makes it difficult to improve work efficiency and wide-scale application. For complex rotor systems, there is still a lack of corresponding calculation methods in China, and the develope...

Claims

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Application Information

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IPC IPC(8): G06F17/50
Inventor 魏军王颖崔常亮雒兴刚李东峰于磊初世明
Owner HARBIN TURBINE
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