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Method for detecting reasons for unbalanced stress of guide bearing of vertical water-turbine generator set

A technology of generator sets and guide bearings, which is applied in the direction of mechanical bearing testing, engine components, machines/engines, etc., can solve problems such as time-consuming and labor-intensive, and cannot meet timely detection, so as to reduce losses, avoid economic losses, and prevent accidents from expanding Effect

Active Publication Date: 2021-08-24
HUANENG LANCANG RIVER HYDROPOWER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, when carrying out cause analysis, it still relies on post-event (after failure) data to sort out and analyze according to human experience, which is not only time-consuming and labor-intensive, but also cannot meet the requirements of timely detection

Method used

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  • Method for detecting reasons for unbalanced stress of guide bearing of vertical water-turbine generator set
  • Method for detecting reasons for unbalanced stress of guide bearing of vertical water-turbine generator set
  • Method for detecting reasons for unbalanced stress of guide bearing of vertical water-turbine generator set

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] A power plant No. 1 unit is a vertical hydraulic generator set with a rated power of 250WM and a rated speed of 125 rpm and a rated excitation current of 1740A.

[0042] After the power generation unit is overhaul, the relevant data is recorded since the start of the generator set, and the relevant data is recorded, and whether the various conduit bearing capacity is imbalance, due to the construction of the hydraulic generator set, lead, water guide three The road lead bearing is similar, and the reason for the imbalance is similar, and therefore, the detection method of the upper guide, the lead is guided, the water guide bearing is generally, and the first embodiment is only the upper conductive axis of the generator set. Whether it is not balanced, and the remaining leading, the detection of the force imbalance of the water guide bearing is identical to the above-mentioned steps, and the specific detection method includes the following steps:

[0043] 1) From the start ...

Embodiment 2

[0067] The No. 4 generator set of a power plant is a vertical hydraulic generator set, the rated power is 350Wm, the rated speed is 75 rpm, the rated excitation current is 2650A, and the generator sets have been recorded during the promotion unit test, and record the relevant data of the upper conductive bearing , The detection force is imbalance, the detection method includes the following steps:

[0068] 1) Since the start of the generator set in 0-1 hours, every 5-6 seconds from the existing generator set online monitoring system acquisition unit, the peak value, the upper guide bearing, 1 times the upper guide bearing Value Y 1 , The unit load projection P, the speed N, the exit circuit breaker position, the upper end surface temperature T of the shaft, as follows:

[0069]

[0070]

[0071]

[0072] Note: The unit speed N is indicated by a percentage, 100% represents the rated speed; the rated excitation current is 2650A, the excitation current I is less than 10a, indic...

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Abstract

The invention provides a method for detecting reasons for unbalanced stress of guide bearings of a vertical water-turbine generator set. The method comprises the following steps: 1) acquiring corresponding data of each guide bearing of the generator set from an existing monitoring system; 2) setting corresponding data of each guide bearing of the generator set; (3) comparing phase parameters and working conditions of the water-turbine generator set to obtain whether the throw is normal or not; (4) finding out the reason for throw abnormity; (5) taking measures to deal with the throw abnormity problem; and (6) checking the processing results. The method effectively and accurately detects the reason for the abnormal throw of the guide bearing corresponding to the hydro-generator set in advance, carries out early warning and processing, provides reference and guidance for overhaul and maintenance of the hydro-generator set, prevents accidents from expanding, reduces loss caused by emergency repair due to fault expansion, and avoids huge economic loss brought to enterprises.

Description

Technical field [0001] The present invention relates to a method of detecting a non-balanced reasons for a vertical hydraulic generator set, belonging to the technical field of failure detection of hydraulic generator machines. Background technique [0002] The vertical hydraulic generator set consists of components such as stator, rotor, wheel, large axis and respective conductors. The effect of each guide bearing is within the set range of rolling routines to ensure The unit is safe. Each of the guide bearing includes the upper conductive bearing, the lower conductive bearing, water guide bearing, wherein the semi-umbrella unit has no lower-conducting bearings, and the structure of a typical vertical hydraulic generator set. Figure 1 . The guide bearing is generally composed of a large axis, a shaft, a shaft, oil basin, and the guide bearing structure. figure 2 . The cooled medium is equipped with a cooling medium in the oil ornament, and the temperature of the shaft tile is lo...

Claims

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Application Information

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IPC IPC(8): G01M13/04G01D21/02F03B11/06
CPCG01M13/04G01D21/02F03B11/066Y02E10/20
Inventor 张宏张兴明吴明波吴涛邢志江王江杨昶宇郗发刚禹跃美
Owner HUANENG LANCANG RIVER HYDROPOWER