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Steam turbine differential expansion and shaft displacement instrument portable verifying table

A technology of shaft displacement and calibration table, which is applied to instruments, mechanical devices, mechanical measuring devices, etc., can solve problems such as affecting the calibration accuracy of the instrument, time-consuming, labor-consuming, and occupation of the pins of the instrument bracket, so as to improve work efficiency. Effect

Active Publication Date: 2015-09-09
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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  • Steam turbine differential expansion and shaft displacement instrument portable verifying table
  • Steam turbine differential expansion and shaft displacement instrument portable verifying table
  • Steam turbine differential expansion and shaft displacement instrument portable verifying table

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] like 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 indicator;

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

Embodiment 2

[0037] like 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 indicator.

[0042] 2.5. A...

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Abstract

The invention belongs to the field of nuclear power station instrument error verification and specifically relates to a steam turbine differential expansion and shaft displacement instrument portable verifying table for improving verification accuracy and reliability of steam turbine differential expansion and shaft displacement instruments. The steam turbine differential expansion and shaft displacement instrument portable verifying table comprises a magnetic pedestal, three locking switches, a guide rail, a dial indicator fixing arm, a translation table, a translation knob, a displacement table and rotating table connecting frame, a rotating table locking screw nut, a rotating table, a rotating table fixing frame, a displacement table, a displacement locking screw nut, a spiral micrometer knob, an instrument fixing module connecting support, a differential expansion instrument fixing module, a shaft displacement instrument fixing module, a dial indicator, a differential expansion instrument, a prepositioned device, a cam, and a shaft displacement instrument. The steam turbine differential expansion and shaft displacement instrument portable verifying table has beneficial effects of quickly and accurately adjusting a gap between the instrument and a steam turbine large shaft with error precision less than 0.1 mm; precisely controlling the moving stroke of the instrument and quickly completing total stroke; and achieving online verification of at least three shaft displacement so as to greatly improve 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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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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