Purification and pollution control of the hottest

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Oil purification and pollution control

in the lubrication system, because the lubricant is polluted by various impurities, dust, moisture, wear debris, microorganisms and oil sludge in the surrounding environment and in the working process of the system, the lubricant is degraded, deteriorated, and the surface of the lubricated parts is worn, damaged, and corroded, so that the lubrication system and components fail, the reliability is reduced, and the service life is shortened. Therefore, implementing the pollution control of the lubrication system, purifying the pollutants in the lubricant in time or replacing new oil, and keeping the lubricant clean are important links in the maintenance and management of the lubrication system. The pollution control of lubrication system can be summarized as follows: 1) pollution analysis of lubrication system; 2) Pollution tolerance analysis of lubricating elements; 3) Filtration and purification of lubricants; 4) Pollution balance and reasonable control of lubrication system. The content and purpose of the pollution process of the lubrication system is to keep the pollution degree of the lubricant within the pollution sensitivity of the lubrication elements through pollution control measures, so as to ensure the reliability and service life of the lubrication system. There are four purification methods for equipment lubricating oil: 1 Filtration; 2. Sedimentation and centrifugation; 3. Adhesion; 4. Static electricity, the latter two methods are often used as purification methods at the same time as the former

1. What are the possible sources of water in the hydraulic oil of injection molding machine

answer: the possible sources of water in the hydraulic oil of the injection molding machine are as follows:

(1), condenser leakage

(2), water in the outside air

(3), oxidation of the oil itself

(4), water in the added oil

(5), human factors (such as flushing)

2. How to take oil samples


(1) start to take oil when the machine runs to normal temperature and load

(2) prepare a clean and suitable sampling bottle and pumping tool when taking oil

(3) generally, the oil extraction point is selected in the middle of the oil tank

(4) do not overfill the sampling bottle

(5) after taking the oil sample, quickly cover the bottle to prevent pollution

(6) clean the outside of the sampling bottle

(7) label the sampling bottle and prepare it for inspection

3. What is the difference between hydraulic oil and hydraulic transmission oil

answer: they all use liquid as the transmission medium to transmit energy. Usually, the liquid transmission medium used in the hydraulic system using liquid pressure energy is called hydraulic oil; The medium used in the transmission system that uses liquid kinetic energy to transmit energy is called hydraulic transmission oil. The performance requirements of these two oils are different. The requirements of hydraulic transmission oil are often stricter than those of hydraulic oil

4. What do European WEEE and RoHS mean

answer: European WEEE refers to the European Directive on the disposal of electronic and electrical equipment, which requires our products to improve the performance of environmental protection

RoHS refers to the restriction of hazardous substances. The specification requires manufacturers to seek to use suitable substitutes to replace substances containing lead, mercury, hexavalent chromium and bromide (including biphenyl compound bromine, ether bromine benzene compound bromine) in their products. The directive also provides more opportunities and challenges for lubricant manufacturers

5. What is fake hydraulic oil

answer: Generally speaking, fake and inferior hydraulic oil has the following characteristics:

(1) dissolve rubber with inferior base oil or diesel oil to pretend to be any hydraulic oil

(2) use general hydraulic oil as anti-wear hydraulic oil

(3) after simple treatment, some recycled oil is used to pretend to be a brand of oil

sometimes, this fake and shoddy hydraulic oil can't see any abnormality in a short period of time when it is used. Some of it is unstable, or the oil deteriorates quickly or the pump wears heavily, which seriously affects the normal work of the hydraulic system and the service life of main components, and then affects the product quality and production efficiency

6. I often see nas8 and nas5 in some oil materials. What do you mean

answer: NAS is the abbreviation of the National Academy of Sciences. Nas8 and nas5 refer to the standard grade of oil purity. The higher the number is, the higher the oil purity is, and the more beneficial it is to the equipment in the process of use. For example, the purity of nas5 oil is much higher than that of nas8 oil

7. What is the main source of cutting heat

answer: the main sources of cutting heat are shear heat and friction heat

8. What are the effects of overheating during cutting

answer: overheated cutting will cause:

(1), workpiece expansion and deformation

(2), affect workpiece finish

(3), aggravate tool wear

(4), affect machining speed

(5), increase production cost

9, what is the appropriate storage temperature of cutting oil and cutting fluid

answer: the storage temperature of cutting oil is easy - 5 ℃ ~ 40 ℃

the storage temperature of cutting fluid is easy - 5 ℃ ~ 35 ℃

10. What are the common extreme pressure additives in cutting fluid

answer: the common extreme pressure additives in cutting fluid are: additives containing phosphorus, chlorine, sulfur and zinc

11. What is the appropriate pH value of emulsified cutting fluid for ferrous and non-ferrous metals

answer: for ferrous metals (steel, iron, etc.), the pH value of emulsified cutting fluid should be controlled between 9 and 9.5, while for non-ferrous metals, it should be controlled between 8.5 and 8.8

12. What are the advantages of using oil for heat transfer

answer: the advantages of using heat transfer oil are:

(1), low pressure

(2), not easy to leak

(3), increased service temperature

(4), long service life

13. What is the purpose of boiling after adding new heat transfer oil to the heat transfer system

answer: the purpose of cooking is to remove water and some light components from the oil. For security reasons

14. What is the standard of constant heat transfer effect

answer: the time interval between two heating of the heat transfer furnace is the standard of constant heat transfer effect

15. What does the air compressor mean by "secondary compression"

answer: the air making process of the air compressor is: suction → compression → exhaust

therefore, when the air compressor is used to transform more than 1000 sets of traditional injection machines into energy-saving ones, some air in the air compressor is not completely discharged after suction, compression and exhaust. This part of air will participate in the first equipment of the air compressor. Accordingly, a test rod function attachment should be processed to realize the alignment of beams, columns, plates, frames and other typical concrete structures, bridges (full-scale, models), steel truss The static load, dynamic load performance test and dynamic load fatigue life test of rubber bearings, fastener assembly, steel strand anchorages, various springs, riggings, slings, ring connections, steel rails and their welded joints, automobile chassis, automobile front and rear axles, locomotive bogies and various large components. Therefore, it is called "secondary compression"

16. What are the common methods to determine the replacement of oil products

answer: common oil change methods mainly include:

(1), empirical oil change method

(2), regular oil change method

(3), scientific inspection oil change method

among which scientific inspection oil change method is the most true and accurate

17. What are the common lubrication methods of oil lubrication

answer: there are several common lubrication methods:

(1), manual lubrication

(2), oil immersion lubrication

(3), oil dripping lubrication

(4), splash lubrication

(5), oil rope lubrication

(6), oil mist lubrication

(7), central centralized lubrication

18, what is emulsification

answer: emulsification is actually a phenomenon that oil molecules and water molecules contain each other

it can be divided into two situations:

(1), oil molecules wrapping water molecules, that is, water in oil type

(2), water molecules wrapping oil molecules, that is, oil in water type

oil emulsification is a physical change. The more common form of emulsification is oil in water, which is often milky white

19. What are the two important methods to detect the true refining degree of white oil

answer: the two important methods to detect the true refining degree of white oil are

(1) hot acid test method

this method is to mix white oil and concentrated sulfuric acid, heat and vibrate to measure the chromaticity of acid layer

(2) ultraviolet absorption test method

this method measures the ultraviolet absorption value of white oil in the spectral region of 260~350nm. The content of aromatics in white oil is characterized by the degree of energy absorption of alkanes and cycloalkanes, while polycyclic aromatic hydrocarbons

20. What are the reasons for the viscosity reduction of diesel engine oil


(1) added low viscosity oil

(2) viscosity regulator failed

(3), fuel percolation

(4), oil heating

21, how to compare the advantages and disadvantages of two different high-temperature chain oils

answer: two different high-temperature chain oils can be compared from the following aspects

(1), anti-wear performance of chain oil

(2), whether low volatility

(3), whether low residue

2 has the influence of polymer structure (such as: polymer type 2, what are the requirements for the deployment of high-quality lubricating oil?

answer: the requirements for the deployment of high-quality lubricating oil are as follows:

(1), the use of high-quality base oil

(2) Balanced additives

(3), advanced blending technology and strict quality control. (end)

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