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Torsional fatigue damage estimation system for shaft system of steam turbine generator unit

A steam turbine generator set, fatigue damage technology, applied in the testing of mechanical components, testing of machine/structural components, instruments, etc., can solve the problems of less use of online torsional stress analysis systems, consume computer resources, etc., to ensure accuracy and the effect of precision

Inactive Publication Date: 2015-12-16
HUAZHONG UNIV OF SCI & TECH
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  • Claims
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Problems solved by technology

[0005] In addition to the above model methods, finite element models can also be used, but because finite element models generally consume computer resources, they are rarely used in online torsional stress analysis systems

Method used

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  • Torsional fatigue damage estimation system for shaft system of steam turbine generator unit
  • Torsional fatigue damage estimation system for shaft system of steam turbine generator unit
  • Torsional fatigue damage estimation system for shaft system of steam turbine generator unit

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Embodiment Construction

[0047] Below in conjunction with accompanying drawing and example describe in detail:

[0048] 1. Estimation system for torsional vibration fatigue damage of turbogenerator shaft system (referred to as system)

[0049] 1. Overall

[0050] Such as figure 1 , the system includes a research object steam turbine shafting 100, equipped with a sensor 200, a modem 300, a collector 400 and a terminal computer (PC) 500;

[0051] The steam turbine shafting 100, the sensor 200, the modem 300, the collector 400 and the terminal computer 500 are connected in sequence.

[0052] 2. Functional components

[0053] 1) Steam turbine shafting 100

[0054] Select the steam turbine shafting used in general power plants.

[0055] 2) Sensor 200

[0056] Select the sensor commonly used in power plants to measure the torsional vibration signal of the machine head;

[0057] Its function is mainly to measure the change of angular velocity caused by torsional vibration when the shaft system is rota...

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Abstract

The invention discloses a torsional fatigue damage estimation system for a shaft system of a steam turbine generator unit and relates to the field of steam turbine generators. The system is composed of the steam turbine generator shaft system (100), a sensor (200), a modem (300), a collector (400) and a terminal computer (500) connected together successively. According to an estimation module of the terminal computer (500), a model offline processing module (510) and a data real time online processing module (520) are in interaction with a fatigue damage analysis module (530) while the fatigue damage analysis module (530) is in interaction with a result display module (540). The estimation system can realize online torsional fatigue damage analysis of the shaft system of the steam turbine generator unit quickly and the estimation module of the system can be nested into a prior power plant safety monitoring system flexibly. The system is suitable for monitoring torsional fatigue damage of shaft systems of steam turbine generator units in power plants and is also suitable for torsional fatigue damage of shaft systems of general large rotation machines.

Description

technical field [0001] The invention relates to the field of steam turbine generators, in particular to an estimation system for torsional vibration fatigue damage of a shaft system of a steam turbine generator set, which has the characteristics of fast, accurate and on-line estimation. Background technique [0002] With the rapid growth of the single unit power of the steam turbine generator set, the shaft system becomes relatively slender; at the same time, the large capacity and long distance of the power transmission system and the complexity of the power system structure, the diversification of power loads, new power transmission and distribution and The application of control technology, etc., can easily induce various coupling vibration resonance phenomena between machines and networks. The torsional vibration of the rotor shafting of large-scale units directly leads to excessive fatigue damage to the torsional vibration of its dangerous parts, which has a serious imp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M13/00G01H17/00
Inventor 王坤黄树红鲁录义胡晓蕾
Owner HUAZHONG UNIV OF SCI & TECH
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