The lubrication system and wear status monitoring and fault diagnosis of wind turbines are important tasks to ensure the safe operation of equipment. By analyzing and detecting the lubricating oil of wind turbines, on the one hand, it can effectively analyze the quality status of the lubricating oil in use, determine whether the oil can continue to be used and when to purify, thereby ensuring the reliable lubrication of the equipment; On the other hand, it can effectively analyze and evaluate the wear status of the equipment and the causes of wear faults, guide the maintenance and upkeep of the equipment according to the situation, and ensure the safe operation of the equipment.
Purpose of analysis and testing of lubricating oil used in wind turbines:
One of them is:By regularly tracking and monitoring the main physical and chemical indicators of lubricating oil used in equipment, the degree of deterioration and pollution reasons of the oil used in the equipment can be identified in a timely manner, and the lubrication status of the equipment can be evaluated.
The second is:By quantitatively and qualitatively analyzing the wear of metal particles in lubricating oil, monitoring and diagnosing the wear failure status and causes of the main friction pairs of the equipment. Considering the characteristics of wind turbines and based on the experience of relevant enterprises in conducting oil monitoring, it is recommended to carry out tracking and monitoring of the lubricating oil of wind turbines.
Complete set of tracking and monitoring projects for lubricating oil in use
Gear oil testing items: kinematic viscosity (40 ℃), moisture content, total acid value, spectral analysis, PQ. Among them:
Spectral elemental analysis: Quantitative data of eighteen elements, including Fe, Al, Cu, Pb, Cr, Mo, Mn, Sn, Ag, Ni, Si, V, Na, B, P, Zn, Ca, Mg, Ba, Ti, etc.
Direct readingFerrographic analysis and its characteristics:
Quantitative detection of the number of ferromagnetic wear metal particles in oil or grease, especially for large-sized particles that are not sensitive to conventional methods such as spectroscopy, has good detection results and can accurately determine the concentration changes of ferromagnetic wear particles in oil. 24 quantitative physical and chemical performance indicators of oil were detected separately, which can evaluate the lubrication, wear, pollution, and quality of oil in wind turbines. When the metal element content in the spectral element analysis project is high or the reading of the direct reading ferrography analysis project is large, it is recommended to add analytical ferrography analysis.
Analyze ferrography analysis and its characteristics:
There are nine qualitative data, including normal wear particles, adhesive abrasion particles, fatigue peeling particles, cutting wear particles, corrosion wear particles, oxidation particles, non-ferrous metal particles, external pollution particles, and oil deterioration particles. Nine qualitative evaluation data on wear and pollution of oil products have been detected, which can provide in-depth evaluation of the lubrication and wear status of wind turbines, especially in effectively analyzing the wear status and causes of wear faults of equipment.
Detection cycle
Developing a reasonable and effective sampling cycle that truly reflects the lubrication and wear status of the machine at that time is an important part of the entire equipment lubrication and wear monitoring project. It should not only avoid excessive analysis and waste, but also ensure that the laboratory has sufficient data to analyze and diagnose the lubrication and wear status of the equipment. Based on the actual operating conditions of wind turbines, it is recommended to take samples and send them for inspection every 3-6 months.
Oil purification is importantnature
It is particularly important to timely purify and treat contaminated oil products by monitoring the lubrication system and wear status of wind turbines. Meifel Fluid Disc Centrifuge (Centrifugal Oil Filter) is an efficient centrifugal oil filter designed, developed, manufactured, and sold for industrial oil. Its working principle is to use the characteristics of different material densities to quickly separate various solid, liquid, and gaseous pollutants (such as water and impurities in oil) that are higher than the density of the oil through centrifugal separation.
Oil filter workflow:
After entering the centrifugal clean oil inlet pipe from the oil tank, the oil flows along the sealing framework towards the top of the centrifugal cylinder under negative pressure. After it fills the entire cylinder chamber, the centrifugal cylinder begins to work. Under the action of centrifugal force, the oil rotates at high speed to separate dense particles, which then flow along the cylinder wall to the pollution collection box; At the same time, the oil that has just been preliminarily purified is squeezed into the disc under pressure, filtered layer by layer on the disc to obtain secondary purification. Finally, it is discharged from the oil pipe and pumped back to the oil tank through pressure, completing a filtration cycle.
The Meifel centrifugal oil filter has advantages such as no need for consumables, high-speed automatic continuous drainage, wide applicability, convenient movement, online and offline applicability, and multifunctional protection. Centrifugal oil filters are widely used in modern industries such as steel, power and wind power generation, chemical industry, shipbuilding, machinery manufacturing, papermaking, plastics, ceramics, and environmental protection. Suitable for purifying and separating hydraulic oil, lubricating oil, gear oil, and oil film bearing oil with viscosity ranges from 25 # to 460 #.
The safe and economical operation of wind turbines is crucial. Optimizing the maintenance management system of wind farms and further streamlining the relationship between maintenance and operation can not only improve the economic benefits of wind power companies, but also change the previous "big and all" and "small and all" business models of wind power companies, get rid of the passive situation of repetition and complexity, and concentrate energy to do a good job in production. The comprehensive implementation of oil monitoring and purification in wind farms fundamentally reduces the wear and maintenance downtime of unit equipment, improves efficiency, and increases benefits.
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E-mail：MFR_2019@163.com
Address：Building 16, Lithium Battery New Energy Industrial Park, Industrial Avenue, Binjiang Town, Yuanzhou District, Yichun City, Jiangxi Province
