Method for detecting increased leakage in hydraulic system of cylinder valve of machine set in non-stop state

CN115013384BActive Publication Date: 2026-05-29HUANENG LANCANG RIVER HYDROPOWER CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
HUANENG LANCANG RIVER HYDROPOWER CO LTD
Filing Date
2022-04-18
Publication Date
2026-05-29

AI Technical Summary

Technical Problem

Existing technologies are insufficient for real-time diagnosis of increased internal leakage in the cylinder valve hydraulic system when the unit is not shut down. This leads to frequent oil pump starts, increased return oil tank temperature, and deterioration of pressurized oil quality. Furthermore, manual inspection is difficult, judgment criteria are inaccurate, and early warning and trend assessment are impossible.

Method used

By collecting real-time data on the return oil tank level, pressure oil tank level, and oil pump start-up status, the total oil volume of the hydraulic device, oil pump start-up time and interval are calculated to comprehensively detect internal leakage in the hydraulic system, enabling timely early warning and fault analysis.

Benefits of technology

It enables timely detection and early warning of internal leakage in the cylinder valve hydraulic system without shutdown, avoiding equipment abnormalities, improving unit operation stability, extending equipment service life, and reducing the risks of manual inspection.

✦ Generated by Eureka AI based on patent content.

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    Figure CN115013384B_ABST
Patent Text Reader

Abstract

The present application relates to the method for detecting the increase of the internal leakage of the cylinder valve hydraulic system when the unit is in the non-stop state, comprising: obtaining the oil level of the return tank, the pressure tank, the start-stop time of the No.1 and No.2 oil pumps at the full opening position of the cylinder valve in the historical period and real time; collecting the length, width of the return tank and the radius of the pressure tank; calculating the total oil quantity of the oil pressure device and the average value of the total oil quantity in the historical period; calculating the start time of the No.1 and No.2 oil pumps, the interval time and the average value of the start time and the interval time of the No.1 and No.2 oil pumps in the historical period; determining the internal leakage trend of the hydraulic system through the real-time data. The present application effectively replaces the manual inspection of the power plant, predicts the abnormality of the mechanical hidden components in advance, finds the fault in time, formulates the disposal measures, avoids the equipment accidents, improves the stability of the unit operation, prolongs the service period of the equipment and provides the reliable technical support for the operation unit.
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