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SYSTEM FOR ON-LINE MONITORING OF OIL QUALITY AND DEGRADATION

IP.com Disclosure Number: IPCOM000245130D
Publication Date: 2016-Feb-11
Document File: 3 page(s) / 191K

Publishing Venue

The IP.com Prior Art Database

Abstract

This invention relates to a system consisting of sensing technology for on–line oil quality analysis and more particularly to a method for degradation factor detection (aging) of in-service oil. The system is applicable for analyzing lubricants used in gas and steam turbines, centrifugal and reciprocating compressor, electric motors. Some of the above technologies have shared oil tank for hydraulic/control and lubrication provision. The implication of this configuration is that the oil is subjected to different operating conditions and then to higher degradation risks. Water contamination, hydrocarbon oil contamination, metal particle presence, oxidation and thermal degradation are only some of the causes of fast oil performance degradation. Lack of real time monitoring of these signs may cause poor detectability of anomalies that can lead to severe damage by mechanisms such as corrosion, rust generation, and wear, varnish formation that are likely to reduce equipment reliability/availability and may eventually lead to premature component damage or to a secondary equipment damages. Innovation of this idea is based on On-Line Oil Quality Monitoring Technology that aims to analyze real time oil characteristics, seeking for incipient degradation/contamination factors, and allows running real time models to estimate residual useful life in order to help moving from preventive to predictive component's maintenance (bearings, servo-valves, filters, heat exchanger, and pumps).

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SYSTEM FOR ON-LINE MONITORING OF OIL QUALITY AND DEGRADATION  

BACKGROUND

This invention relates to a system consisting of sensing technology for On–Line Oil Quality analysis and more particularly to a method for degradation factor detection (aging) of in-service oil.

As is commonly known, lubrication is an important aspect to maintain machinery in proper operation. As the deteriorated/contaminated lubricant continues to be used, this cause filters and servo valve sticking/clogging or bearing varnishing/sludge accumulation that may eventually lead to premature components damage or to secondary equipment damages. Unpredicted failures increase large industrial plant downtime leading to loss of revenues.

Conventionally, Oil Quality Monitoring is made by off-line checks of physical and chemical parameters once it is sampled and sent to laboratories for analysis. Moreover, considerable time is needed to obtain feedback after the lubricant oil has been sampled and it is hard to say if sampling has been done at proper timing.

Portable sensors are available for in-situ oil monitoring but that requires oil sampling made by a qualified operator and it is limited to site geographic position and operation guidelines. However the time scheduled for oil changeover is advised by oil manufacturer referring to a due date for new oil and off-line checks. This invention is propaedeutic to the condition–based oil change intervals and to the predictive maintenance of lubricated components.

BRIEF DESCRIPTION

This invention relates to a system consisting of sensing technology for on–line oil quality analysis and more particularly to a method for degradation factor detection (aging) of in-service oil.

The system is applicable for analyzing lubricants used in gas and steam turbines, centrifugal and reciprocating compressor, electric motors.

Some of the above technologies have shared oil tank for hydraulic/control and lubrication provision. The implication of this configuration is that the oil is subjected to different operating conditions and then to higher degradation risks. Water contamination, hydrocarbon oil contamination, metal particle presence, oxidation and thermal degradation are only some of the causes of fast oil performance degradation. Lack of real time monitoring of these signs may cause poor detectability of anomalies that can lead to severe damage by mechanisms such as corrosion, rust generation, and wear, varnish formation that are likely to reduce equipment reliability/availability and may eventually lead to premature component damage or to a secondary equipment damages.

Innovation of this idea is based on On-Line Oil Quality Monitoring Technology that aims to analyze real time oil characteristics, seeking for incipient degradation/contamination factors, and allows running real time models to estimate residual useful life in order to help moving from preventive to predictive component’s maintenance (bearings, servo-valves,...