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Method for measuring jack height of turbo generator set based on TSI system

A turbo-generator set, height measurement technology, applied in the direction of electric/magnetic thickness measurement, electromagnetic measurement device, etc., can solve the problems of large human error, low safety, difficult operation, etc., to increase reliability, improve measurement accuracy, Simple operation effect

Inactive Publication Date: 2016-11-09
STATE GRID HEBEI ENERGY TECH SERVICE CO LTD +2
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current measurement of the jacking height is the method of erecting a dial gauge reading with a long rod at the exposed place of the narrow journal. This method is restricted by the operating state and the site, and there are difficulties in operation, low safety, and large human errors. shortcoming

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  • Method for measuring jack height of turbo generator set based on TSI system

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Effect test

Embodiment 1

[0020] Shut down the unit, stop the shafting of the unit, put the lubricating oil system into operation, and start the TSI system in sequence. Then stop the jacking shaft oil pump, measure and record the output voltage U of the shaft vibration sensor in the X and Y directions X0 =-11.000V, U Y0 =-10.900V. Start the jacking shaft oil pump, measure and record the output voltage U of the shaft vibration sensor in the X and Y directions after the operation is stable X1 =-10.700V, U Y1 =-10.700V, calculate the voltage change U X1 -U X0 =0.3V, U Y1 -U Y0 =0.2V; According to the sensitivity coefficient α of X-direction and Y-direction axial vibration sensor X =8V / mm, α Y =8V / mm converts the voltage change into displacement change|X|=|(U X1 -U X0 ) / α X |=0.0375mm, |Y|=|(U Y1 -U Y0 ) / α Y |=0.025mm.

[0021] Take the horizontal mid-section of the bearing bush as the abscissa, the vertical mid-section as the ordinate, and the intersection point of the abscissa and y-coordi...

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Abstract

The invention relates to a method for measuring the jack height of a turbo generator set based on a TSI system. The method comprises the following steps of: adjusting the running mode of a turbo generator set jack height measuring process; stopping a jacking oil pump, measuring and computing the DC voltage changed quantity of a jack vibration sensor, and computing a displacement changed quantity according to the sensitivity coefficient of the jack vibration sensor; defining a vector X and a vector Y in a plane-coordinate system, and computing the component of the vertical coordinates of the X+Y, namely the jack height. The method is easy to operate, convenient, and practical, may reduce the safety risk of field operation, achieves digitalized measurement of the turbo generator set jack height, increases measurement precision, and enhances the operation reliability of the turbo generator set.

Description

technical field [0001] The invention relates to the technical field of measurement of a turbogenerator set, in particular to a method for measuring the top shaft height of a turbogenerator set based on a TSI system. Background technique [0002] During the start-up and stop process of the turbogenerator, the journal and the bearing bush cannot form an effective oil film at low speed, which may easily cause dry friction between the journal and the bearing bush, resulting in equipment damage accidents. After shutdown, in order to avoid the rotor bending due to the temperature difference between the upper and lower cylinders and to eliminate the elastic bending caused by the rotor being stationary for a long time, the units are required to be put into cranking operation after shutdown. In order to reduce the cranking torque and prevent the wear of the journal and bearing bush, large turbogenerators are equipped with a jacking device to provide high-pressure oil to form a hydros...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B7/06
CPCG01B7/06
Inventor 王文营戴喜庆卢盛阳张伟江高翔唐广通
Owner STATE GRID HEBEI ENERGY TECH SERVICE CO LTD
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