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Method for measuring radial flow path clearance of steam turbine through laser tracking measuring system

A technology of laser tracking measurement and system measurement, which is applied in the field of steam turbines to reduce maintenance costs, reduce labor workload, and increase production income

Active Publication Date: 2019-01-11
CHINA GENERAL NUCLEAR POWER OPERATION +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a laser tracking measurement system for measuring the radial flow gap of a steam turbine in view of the defects caused by gap measurement in the prior art by using lead wire or rubberized cloth and partition alignment. method

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  • Method for measuring radial flow path clearance of steam turbine through laser tracking measuring system
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  • Method for measuring radial flow path clearance of steam turbine through laser tracking measuring system

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Embodiment Construction

[0048] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation manners of the present invention will now be described in detail with reference to the accompanying drawings.

[0049] The invention uses a laser tracker to measure the center line of the rotor, the inner diameter of the hub, and the vertical arc of the rotor, and measures the center line of the cylinder body in the cylinder under the state of being completely empty, the distance from the diaphragm seal teeth to the center line of the cylinder body, and the shaft seal seal. The distance from the teeth to the center line of the cylinder body, etc., according to the relative position of the rotor and the cylinder when disassembled, analyzed and processed the above measurement data, and fitted the actual flow gap in the cylinder under the cold state of the full solid cylinder. The invention can also dismantle the cylinder to the half...

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Abstract

The invention discloses a method for measuring the radial flow path clearance of a steam turbine through a laser tracking measuring system. The method comprises the steps that S10, the radial relativeposition of a rotor and a steam cylinder in r the cold state of the steam cylinder is measured; S20, the laser tracking measuring system is adopted to measure a shaft seal and rotor hub surfaces corresponding to partition plates in a station transferring mode, and the diameters and rotor vertical arcs of the measured rotor hub surfaces are fitted; S30, the laser tracking measuring system is adopted to measure tooth tip coordinates of all stages of partition plate steam seal blocks and shaft seal steam seal blocks in the cylinder, and shaft seal bores on the outermost side of the steam end andthe exciter end in a station transferring mode, the shaft seal bores on the outermost side of the steam end and the exciter end are fitted, a cylinder body center line is created, and the distances from the tooth tips of all the stages of partition plate steam seal blocks and the shaft seal steam seal blocks to the cylinder body center line are fitted; and S40, the laser tracking measuring systemis adopted to fit the radial clearance of an actual partition plate steam seal and the shaft seal steam seal in the cylinder under the cold state according to the measured relative position of the rotor and the steam cylinder and based on data in the step S20 and the step S30. By applying the method for measuring the radial flow path clearance of the steam turbine through the laser tracking measuring system, the measuring precision is improved.

Description

technical field [0001] The invention relates to the field of steam turbines, in particular to a method for measuring the radial flow gap of a steam turbine by a laser tracking measurement system. Background technique [0002] As the country's demand for clean electricity continues to grow, the maintenance period is required to be shorter and shorter. As an important part of power plant equipment, steam turbines are increasingly being tested for their overhaul period. Among them, the measurement and adjustment of the cylinder flow clearance is the most important part of the steam turbine cylinder overhaul project. Its smooth implementation can not only Ensure the safe operation of the unit and improve the operating efficiency of the unit. However, this work takes a long period of time in the current steam turbine overhaul, and frequent lifting of large equipment brings huge risks to the job site. Therefore, on the premise of ensuring the quality of maintenance, how to short...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01D21/00F01D11/04G01B11/14
CPCF01D11/04F01D21/003G01B11/14
Inventor 郑华兵黄祥君原帅关运生何志德段宪东李生璐蔡勇军罗林刘思伟蔡宝金何洪义苏志刚贾凯利张平张亚辉杨秀武阮冰张晓飞郑志平吴琼
Owner CHINA GENERAL NUCLEAR POWER OPERATION
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