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Steam Turbine Rotor Stress Online Real-time Monitoring System

A real-time monitoring system, a technology for steam turbine rotors, applied in mechanical equipment, engine components, machines/engines, etc., can solve problems such as maintenance difficulties, dependence on hardware platforms, etc., to achieve the effect of convenient use and universality

Active Publication Date: 2016-03-23
HARBIN TURBINE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to propose a steam turbine rotor stress online real-time monitoring system to solve the problem that existing methods rely on hardware platforms and are difficult to maintain

Method used

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  • Steam Turbine Rotor Stress Online Real-time Monitoring System
  • Steam Turbine Rotor Stress Online Real-time Monitoring System

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specific Embodiment approach 1

[0027] Specific implementation mode one: combine figure 1 , Figure 5 The steam turbine rotor stress online real-time monitoring system described in this embodiment includes: a modbus for reading the real-time state information of the rotor from the DEH control cabinet (2), and transmitting data to the DEH control cabinet (2) through the communication card (3) communication module;

[0028] A parameter display module for displaying the real-time status information of the rotor and the characteristic parameters of the rotor itself;

[0029] The rotor temperature calculation and display module is used to calculate the layer temperature, average temperature and effective temperature difference of each layer of the rotor, and display it in the corresponding window in the form of a bar graph and a curve;

[0030] A rotor stress calculation display module for calculating the stress of the rotor at each moment and displaying the rotor stress curve at each moment in the correspondin...

specific Embodiment approach 2

[0039] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is that the real-time status information includes the rotational speed N 1 , after adjusting the metal temperature θ 0 , steam temperature θ after regulating stage ∞ , Regulating stage pressure P.

specific Embodiment approach 3

[0040] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the characteristic parameters of the rotor itself include Poisson’s ratio u, rotor radius R 0 , rotor thermal conductivity λ, linear expansion coefficient β, elastic modulus E, stress concentration coefficient K th , rotor specific heat c, allowable stress σ 许用 , rotor density ρ.

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Abstract

The invention relates to a rotor stress online real-time monitoring system of a steam turbine, and belongs to the technical field of a DEH (digital electro-hydraulic) adjusting system of a steam turbine, which aims at solving the problems of reliance on the hardware platform and difficult maintenance of the prior art. The rotor stress online real-time monitoring system is technically characterized in that the real-time state information of a rotor is sent to a stress computing system of an operator station from a DEH control cabinet by a communication card through a modbus communication module, the stress computing system of the operator station is used for computing the stress of the rotor according to the real-time state information and the self characteristic parameters of the rotor, and the speed increase rate or load increase rate meeting the requirement is obtained, and is sent to the DEH control cabinet by the communication card through the modbus communication module, so as to provide reference information for the DEH. The rotor stress online real-time monitoring system can be applied to the monitoring and control of the starting and running of the steam turbine of a power station.

Description

technical field [0001] The invention relates to a steam turbine rotor stress monitoring system, in particular to an online real-time monitoring system for steam turbine rotor stress, belonging to the technical field of steam turbine digital electro-hydraulic regulation systems. Background technique [0002] In modern large-scale turbogenerators, the rotor is in a high-temperature and high-pressure environment, and the stress situation is complicated. The life loss of the rotor is directly related to the stress on the rotor, especially the thermal stress of the rotor affects the life of the rotor even more. For such a high-speed rotating rotor, the temperature of each point of the rotor cannot be directly measured, so the stress is generally calculated with a mathematical model. At present, domestic steam turbine generator sets generally use the logic algorithm block in the DPU of the DEH control cabinet to calculate the stress of the steam turbine rotor. This method has the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01D21/00
Inventor 何喜辉代波涛郭德军崔大海杜继光
Owner HARBIN TURBINE
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