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Core reminder: Contaminated industrial hydraulic oil refers to the hydraulic oil containing water, air, fine particles and other impurities. The pollution process of hydraulic oil includes: transportation, installation, operation, maintenance,
Contaminated industrial hydraulic oil refers to the hydraulic oil containing moisture, air, fine particles and other impurities. The pollution process that causes hydraulic oil includes: transportation, installation, operation, maintenance, storage, natural mixing and materialization process. Contaminated hydraulic oil can cause system failures. It is very important to control the contamination of hydraulic oil well.
Analysis of the causes of contamination of hydraulic oil:
1. Solid particles: such as dust, wear debris, burrs, rust, paint, welding slag, flocs, etc. Accelerate component wear, blockage and decrease system function, causing noise.
2. Water: Oxidize oil, and produce colloid with additive effect.
3. Air: Causes cavitation and reduces oil lubricity and bulk modulus.
4. Chemical substances: such as solvents, surface active compounds, etc. Corrosion of metals and oil degeneration.
5. Microorganisms: Cause oil to decay, reduce lubricity and accelerate component corrosion.
6. Temperature: lead to poor sealing, component damage, system function decline, oil deterioration, etc.
7. Other oils mixed into hydraulic oil. The chemical composition of hydraulic oils of different varieties and trademarks is different. When other oils are mixed into the hydraulic oil, its chemical composition will be changed, and then its properties will also change.
8. Residue pollution: mainly refers to the sand, iron filings, abrasives, welding slag, rust flakes, grease, cotton yarn and dust brought in during the production, storage, transportation, installation and repair of hydraulic components, pipelines and fuel tanks. , Of course, the hydraulic oil pollution is formed by the residues that are left behind by cleaning, but not cleaned;
9. The pollution of Tianbi: mainly refers to the hydraulic fluid formed by metal particles, sealing material wear particles, paint peeling sheets, moisture, air bubbles, and gelatinous substances after oil degeneration in the hydraulic transmission system during operation. Pollution. These particles of dirt are similar to the abrasives used to grind metal processing surfaces. The pollution particles in the hydraulic system follow the activity of the hydraulic oil and spread throughout the system. When passing through the hydraulic components of pumps, cylinders, and valves, it will aggravate the wear of each friction pair, generate new pollution particles, form a vicious circle, greatly reduce the service life of the components, and seriously threaten the normal operation of the hydraulic system. Oil differentiation residues and surface active agents, etc., they will corrode the machine parts, and make the surface dirt of the components scatter into the oil and make it difficult to remove. They also reduce the ability of the filter to adhere to the dirt, and often throttle the small holes. block. The failure of hydraulic components causes trouble.
10. Pollution of intrusive objects: mainly refers to pollutants in the surrounding environment, such as air, dust, water droplets, etc., penetrate the system through all possible penetration points, such as exposed reciprocating piston rods, fuel tank vents and oil injection holes, etc. The resulting hydraulic fluid pollution; for example, careless cleaning during the repair process, bringing in pollutants around the environment, replacing the coarser with the finer, or even without the filter. The filter has not been cleaned for several years, and the filter is not often cleaned or replaced. Don't pay attention to oil filtering when oil or refueling. Dirty oil drums are used without rigorous cleaning, and then contaminants are brought in.
