A Portable Calibration Platform for Steam Turbine Differential Expansion and Shaft Displacement Instrument

A technology of axial displacement and displacement table, which is applied in the field of portable calibration platform for steam turbine differential expansion and axial displacement instruments, can solve the problems of affecting the accuracy of instrument calibration, cumbersome operation, large return error, etc., and achieve the effect of improving work efficiency

Active Publication Date: 2018-04-27
JIANGSU NUCLEAR POWER CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 1. It is time-consuming and labor-intensive to disassemble the pins of the instrument bracket, and more main line time is occupied during the calibration of the steam turbine instrument;
[0005] 2. The instrument calibration bracket drives the spring in the bracket to move through the big nut. The moving process is cumbersome and takes about 20 minutes for the whole journey;
[0006] 3. During the calibration, the instrument bracket shakes greatly and the return error is large, which affects the calibration accuracy of the instrument

Method used

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  • A Portable Calibration Platform for Steam Turbine Differential Expansion and Shaft Displacement Instrument
  • A Portable Calibration Platform for Steam Turbine Differential Expansion and Shaft Displacement Instrument
  • A Portable Calibration Platform for Steam Turbine Differential Expansion and Shaft Displacement Instrument

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Such as figure 2 As shown, when calibrating the differential expansion instrument of the steam turbine:

[0031] 1.1. Install the differential expansion instrument 18 to be verified with the fixed module 15 of the differential expansion instrument;

[0032] 1.2. Place the portable calibration table on the cylinder block of the steam turbine, adjust the gap between the instrument to be calibrated and the rotor cam 20 through the rotary table 9 and the displacement table 11, close the locking switch 2, and fix the calibration table ;

[0033] 1.3. Fix the dial gauge 17 on the calibration platform through the dial gauge fixing arm 4, and adjust the dial gauge to keep it level with the translation platform 5.

[0034] 1.4. Rotate the translation knob 6 to simulate the relative expansion of the rotor and the cylinder and the axial displacement of the rotor, and read the relative displacement through the dial gauge;

[0035] 1.5. According to the recorded data, it is judg...

Embodiment 2

[0037] Such as image 3 As shown, to calibrate the shaft displacement instrument of the steam turbine:

[0038] 2.1. The shaft displacement meter 21 to be verified is installed through the shaft displacement meter fixing module 16, and six shaft displacement meters can be installed at the same time;

[0039] 2.2. Place the portable calibration table on the cylinder block of the steam turbine, adjust the gap between the instrument to be calibrated and the rotor cam through the rotary table 9 and the displacement table 11, close the locking switch 2, and fix the calibration table;

[0040] 2.3. Fix the dial gauge 17 on the calibration platform through the dial gauge fixing arm 4, and adjust the dial gauge to keep it level with the translation platform 5.

[0041] 2.4. Rotate the translation knob 6 to simulate the relative expansion of the rotor and the cylinder and the axial displacement of the rotor, and read the relative displacement through the dial gauge.

[0042] 2.5. Acc...

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Abstract

The invention belongs to the field of instrument error calibration in nuclear power plants, and specifically relates to a portable calibration platform for steam turbine differential expansion and axial displacement instruments that improves the calibration accuracy and reliability of steam turbine differential expansion and axial displacement instruments; it includes a magnetic base, 3 Locking switch, guide rail, fixed arm of dial indicator, translation stage, translation knob, connecting frame between translation stage and rotation stage, rotation stage lock nut, rotation stage, rotation stage fixing frame, translation stage, displacement lock nut, screw gauge Micro-knob, instrument fixing module connection bracket, differential expansion instrument fixing module, shaft displacement instrument fixing module, dial indicator, differential expansion instrument, front-end device, cam and shaft displacement meter; the beneficial effects of the present invention are: fast and accurate adjustment The gap between the instrument and the large shaft of the steam turbine, the error accuracy is less than 0.1mm; the stroke of the instrument can be accurately controlled and the full stroke can be completed quickly; the displacement of at least three axes can be verified online at the same time, which greatly improves the work efficiency.

Description

technical field [0001] The invention belongs to the field of instrument error calibration in nuclear power plants, and in particular relates to a portable calibration platform for steam turbine differential expansion and axial displacement instruments. Background technique [0002] Each steam turbine in a nuclear power plant has several low-pressure cylinder expansion gauges, high-pressure cylinder shaft expansion gauges, high-pressure cylinder cylinder expansion gauges, and shaft displacement gauges. According to the maintenance program, the steam turbine differential expansion and shaft displacement gauges need to be repaired every time they are overhauled. Calibration calibration. [0003] The existing instrument calibration method is cumbersome to operate. The instrument bracket is fixed by screws and pins. When calibrating the instrument, the pin needs to be pulled out, and then the large nut drives the instrument bracket to move to simulate the relative expansion of th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B5/02
Inventor 徐霞军黄潜涂彩清黄亚宁张海滨侯耀张成立杨林远凌农朱峰张桂虎张建佟海威范学英侯绍辉吴金堤
Owner JIANGSU NUCLEAR POWER CORP
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