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Automatic non-contact hydro-generator rotor roundness measuring device and method

A hydro-generator and automatic measurement technology, which is applied to electromagnetic measurement devices, electric/magnetic profile/curvature measurement, etc., can solve the problems of heavy manual calculation and analysis workload, low precision when measuring roundness by dial indicator, etc. Achieve the effect of automatic recording, reducing manual workload and reducing impact

Active Publication Date: 2014-07-30
CHINA GEZHOUBA GROUP CO LTD
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a non-contact automatic measuring device and method for the roundness of the rotor of the hydro-generator, which can solve the problem of low precision of the dial indicator measuring the roundness during the rotor assembly process and the workload of manual calculation and analysis. big technical problem

Method used

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  • Automatic non-contact hydro-generator rotor roundness measuring device and method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Such as figure 1 Among them, a non-contact automatic measuring device for the roundness of the rotor of a hydro-generator comprises a round measuring frame 2, the end of the round measuring frame 2 is provided with a vertical measuring arm 10 which rotates along the outer wall of the rotor 1, and the vertical measuring arm 10 is provided with a plurality of eddy current sensors 3 from top to bottom, and the eddy current sensors 3 are not in contact with the rotor 1, and a gear disc counter 5 is arranged on the rotating shaft of the round measuring frame 2, and the eddy current sensors 3 and the gear disc counter 5 pass through the wire The cable 6 is connected with the data collector 4 . In this example, the data collector 4 is arranged on the measuring circle frame 2, and the data collector 4 is connected with a computer. The eddy current sensor can measure the distance between the metal conductor under test and the surface of the probe with non-contact, high linearit...

Embodiment 2

[0030] On the basis of Embodiment 1, a method for automatically measuring the roundness of the rotor of a hydroelectric generator using the above-mentioned device comprises the following steps:

[0031] 1. Level the rotor 1, install the round frame 2, install the eddy current sensor 3, the disc counter 5 and the data collector 4; install the round frame 2 at the center of the rotor 1 to be tested to ensure the installation accuracy of the round frame .

[0032] According to the mathematical model of the rotor 1 to be measured, determine the measurement parameters of the elevation, angle, and radial gap value of the point to be measured, and write a special program for processing data.

[0033] 2. Rotate the round frame, the eddy current sensor 3 measures the roundness of the rotor 1 to be tested, and each magnetic pole should be set with a measuring point; each measuring point needs to record the elevation of the point to be measured, the angle of rotation, and the gap value i...

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Abstract

The invention provides an automatic non-contact hydro-generator rotor roundness measuring device and method. The device comprises a roundness measuring frame, a vertical measuring arm rotating around the outer wall of a rotor is arranged at the end of the roundness measuring frame, the vertical measuring arm is provided with a plurality of electric vortex sensors from top to bottom, a fluted disc counter is arranged at the position of a rotating shaft of the rotor, and the electric vortex sensors and the fluted disc counter are connected with a data acquisition unit through cables. The roundness measuring frame is rotated so as to measure the roundness of the rotor to be measured, and each magnetic pole needs to be provided with measuring points; each measuring point needs to record the elevation of a point to be measured, the rotation angle of the point to be measured and the gap value of the radius direction of the point to be measured, and the elevation of the point to be measured, the rotation angle of the point to be measured and the gap value of the radius direction of the point to be measured are transmitted to and stored in the data acquisition unit. Measuring data in the data acquisition unit are input into a computer to be processed, an analysis result is output automatically, and the rotor is regulated. Through the steps, automatic non-contact hydro-generator rotor roundness measurement is achieved. The automatic non-contact hydro-generator rotor roundness measuring device and method solve the problems that in the rotor assembly process, the accuracy is not high when a dial indicator is used for measuring the roundness, and the workload of manual computational analysis is high.

Description

technical field [0001] The invention relates to the installation field of a hydroelectric generator rotor in a hydroelectric power generation project, in particular to a non-contact automatic measuring device and method for the roundness of a hydroelectric generator rotor. Background technique [0002] The rotor, stator and other components of large hydro-generators have large diameters, and the roundness accuracy requirements are very high. The roundness of the rotor needs to be measured during the assembly process. At present, the commonly used measurement method is to install a circular frame with a displacement dial indicator at the center of the rotor and stator for measurement. For example, Chinese patent CN102829701A discloses a large-scale hydraulic generator rotor measuring round frame and its use method. The measuring circle frame; the dial indicator is installed on the measuring circle frame to measure the roundness of the rotor; the displacement dial indicator m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B7/28
Inventor 江小兵江晨程志华
Owner CHINA GEZHOUBA GROUP CO LTD
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