A method for measuring and adjusting the axis of a continuous pumped storage unit

A pumped-storage unit and axis measurement technology, applied in measurement devices, instruments, electrical devices, etc., can solve the problems of reducing the working time of cranking, uneven rotation speed of the large shaft, etc., to improve cranking accuracy and shorten the The effect of driving time, easy operation and implementation
CN104848781BActive Publication Date: 2017-04-19SOUTHERN POWER GRID PEAK LOAD & FREQUENCY REGULATION GENERATING CO LTD
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Patents(China)
Current Assignee / Owner
SOUTHERN POWER GRID PEAK LOAD & FREQUENCY REGULATION GENERATING CO LTD
Publication Date
2017-04-19

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Abstract

A continuous pump storage unit axis measuring and adjusting method includes the steps of: S1. sensor calibration: calibrating a sensor of each channel before barring; S2. data sampling: sampling in an independent parallel mode of multiple channels; S3. data filtering: using FIR Chebyshev type-I low-pass digital filtering; S4: phase recognition: using phase recognition technology to recognize and mark an initial phase and a phase of a sampling point; and S5. sine fitting: adopting particle swarm optimization to obtain a throw initial phase, a throw amplitude value and a throw DC component of a throw sine curve. The continuous pump storage unit axis measuring and adjusting method provided by the invention can realize data sampling of any rotation angle and any point number, filters higher interference harmonics, and solves the problem of nonuniform rotation speed of a large shaft through phase recognition technology; the method also improves axis inspection precision of a unit, shortens barring time, reduces manpower required by barring, and brings huge economic benefits; and a system interface that is adopted is concise, the method is easy to operate and implement, and the method has general popularization value for unit axis inspection and adjustment.
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Description

technical field

[0001] The invention relates to a method for measuring and adjusting the axis of a continuous pumped storage unit. Background technique

[0002] The axis measurement, analysis and adjustment of large vertical hydro-generator units (including pumped storage units) are the most critical procedures in the maintenance of the unit, occupying most of the maintenance period of the unit, and the success or failure of the axis adjustment work will directly affect the maintenance of the unit The success or failure of the work, this is because the condition of the axis of the unit will directly affect the stability of the unit operation and the normal operation of the guide bearing. Fast and accurate axis adjustment technology will greatly improve the efficiency of maintenance work and bring huge economic benefits, which is of great significance to the improvement of power plant benefits.

[0003] At present, the axis adjustment and processing technology of my country'...

Claims

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