Method for solving steam turbine vibration by utilizing cylinder holding of steam turbine

A steam turbine and cylinder stuffing technology, which is applied in the directions of machines/engines, mechanical equipment, engine components, etc., can solve the problems of rapid temperature rise of cylinder metal, uneven cylinder expansion, and lack of solutions for steam turbines, and achieves promising results.

Inactive Publication Date: 2018-11-30
JINAN QIQUAN THERMOELECTRICITY
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Problems solved by technology

The reason for the asynchrony is: the steam temperature in the cylinder rises sharply, and the metal temperature of the cylinder rises rapidly, which increases the temperature difference between the upper and lower cylinders and the temperature difference between the inner and outer walls of the cylinder, which easily causes uneven expansion of the cylinder.
If the expansion

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  • Method for solving steam turbine vibration by utilizing cylinder holding of steam turbine

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[0033] It should be pointed out that the following detailed description is exemplary and intended to provide further explanation to the present application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

[0034] It should be noted that the terminology used here is only for describing specific implementations, and is not intended to limit the exemplary implementations according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and / or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and / or combinations thereof.

[0035] Terminology Explanation Section: Including self-defined terms, uncommon terms, terms that need to be expl...

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Abstract

The invention discloses a method for solving steam turbine vibration by utilizing cylinder holding of a steam turbine. The method comprises the steps that when the steam turbine is started in a cold state and a rotor reaches critical speed of rotation, a unit produces strong vibration and exceeds a vibration value of rated rotation speed, cylinder holding treatment is performed, namely steam turbine vacuum is destroyed, and all air inlet doors and a water repelling door of the steam turbine are closed. Restarting is performed after cylinder holding for 30 minutes, the unit stability exceeds the critical speed of rotation, and the vibration of the unit disappears.

Description

technical field [0001] The invention relates to the technical field of steam turbines, in particular to a method for solving the vibration of the steam turbine by utilizing the bored cylinder of the steam turbine. Background technique [0002] When the #5 steam turbine was started in a cold state, when the rotor reached the critical speed, the unit suddenly vibrated strongly, exceeding 0.07mm. Among them, the #5 steam turbine was a condensing steam turbine N12-343. The reason for the above vibration is: the steam temperature in the cylinder rises sharply, and the metal temperature of the cylinder rises rapidly, which increases the temperature difference between the upper and lower cylinders and the temperature difference between the inner and outer walls of the cylinder, which easily causes uneven expansion of the cylinder. [0003] The cold start of the steam turbine means that the steam turbine has not been started for a long time, at least for one day. In this case, it wi...

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Application Information

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IPC IPC(8): F01D21/02
CPCF01D21/02
Inventor 闫秀芹丁晋苏国栋乔东尧
Owner JINAN QIQUAN THERMOELECTRICITY
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