Maintenance of hydraulic oil (provided that the equipment operates normally without abnormal conditions):
1. Hydraulic oil shall not be used under high temperature; The oil will quickly deteriorate under high temperature;
2. The air filter on the hydraulic station shall be a filter that can filter both particles and moisture;
3. The precision filter element is used to filter the hydraulic oil, so that the pollution degree of the oil is maintained at NAS<8 for a long time. The filter element provided by the equipment is generally too poor in precision, so the cleanliness of the hydraulic oil cannot be achieved. Because the dirt capacity limit of the hydraulic station is only 5um, and the precision of the built-in filter element is often greater than this size, it is scientifically stipulated that the pollution degree of the general hydraulic station should be controlled at NAS less than Grade 8; The requirements for equipment with servo mechanism are higher, less than level 7. If you have removed the servo valve, you will understand why the hydraulic oil pollution should be controlled so high. It is easy to buy a precision oil filter for online filtration, and some filter elements have reached the precision of 0.1um;
4. Centrifugal dehydration/vacuum dehydration (for oil stations with water) can be used for 5 years as long as they are well controlled, such as MOBIL, SHELL, etc;
5. Regularly check the oil products: hydraulic oil is widely used and is a product that is widely used in industrial oil. At present, hydraulic components are developing towards small size and large power, and the system pressure is getting higher and higher, some of which have exceeded 50MPa. For this reason, the ordinary L-HL series has tended to be eliminated, and the anti-wear L-HM series has been applied more. Low temperature performance is also an important characteristic of hydraulic oil. It is required that the equipment can be started easily under low temperature environment, and the power transmission is sensitive. Moreover, the oil change cycle of hydraulic oil is long. For example, outdoor equipment is usually changed once a year, and the hydraulic oil will inevitably undergo changes in four seasons during use. Therefore, the use of low pour point products for outdoor equipment is effective. Cleanliness has also become the performance requirement of hydraulic oil. Generally, the NAS particle size of products should not be more than 9, that of clean products should not be more than 7, and that of high cleaning products should not be more than 5. However, blindly pursuing the NAS level will not have any effect, but will reduce the quality and increase the cost. For example, some machinery manufacturers or engineering machinery users do not have a dust-free workshop for adding hydraulic oil. Even if they spend a lot of money on NAS 5, the high cleaning NAS 5 hydraulic oil will become NAS 8 at the moment of opening the product. Moreover, high NAS level of hydraulic oil means more filtering times, and expensive additives will be filtered out during the filtering process, Therefore, from the point of view, the NAS level is not the pursuit;
6. Prevent air from entering the oil: the oil suction port of the oil pump should be sealed reliably, the oil suction pipe in the oil tank should not be too close to the oil level, and the high point of the system should be equipped with an exhaust valve to drain the free air in the oil;
7. Reasonable design of oil tank: the oil suction pipe shall be far away from the oil return pipe to avoid the use of lead, zinc, copper and other materials that catalyze the oxidation of oil. The oil tank shall be coated with oil resistant antirust paint, and the cooler in the oil tank shall not leak.
14 methods to determine the replacement time cycle of the oil pump hydraulic oil:
1. Transparent but with small spots, look, mix with sundries, and filter;
2. Appear milky white, look, mix in water, break up water;
3. The color fades, look, mixed with heterogeneous oil to treat the viscosity, if it can be used continuously;
4. Black, turbid, dirty, look, pollution and dilution, exchange;
5. Compared with new oil, smell: odor or scorch, replace;
6. Taste, smell, sour, normal;
7. Bubbles are easy to disappear and normal after inoculation;
8. Viscosity, compare the flow rate with new oil, consider the temperature, mix with different oil, etc., and deal with it according to the situation;
9. Moisture, whether there are some cracking analysis methods, observe the results, scatter moisture;
10. Granules, nitric acid immersion method, local investigation, filtration;
11. Impurities, oxidation, inspection, filtration;
12. Corruption, erosion method, observation of results, and punishment according to the situation;
13. Pollution degree, drip method, erosion results, punishment depending on the environment;
14. Color, see, transparent, no color change, continuous use.
Product advantages:
1. Thermal stability: Delix hydraulic oil has strong anti deterioration and anti sludge generation capabilities, greatly improving the reliability and cleanliness of the system;
2. Oxidation resistance: It can still maintain the oxidation resistance in the presence of air, water and copper. The results of turbine oil oxidation stability test (TOST) show that Delix has excellent antioxidant capacity, low acidity, less sludge and less sludge formation. Therefore, the use of Dulux can prolong the oil change period and reduce the maintenance cost;
3. Hydrolysis stability. In humid environment, Delix has superior chemical stability, ensuring long service life and avoiding corrosion and rusting;
4. The anti-wear performance of and anti-wear additives of can play a reliable role in various operating conditions throughout the oil service life, including low load and end load conditions. The anti-wear performance of has been verified in various piston and vane pump tests, including the rigorous Denison T6 (dry and wet environments) and the strict Vickers 35VQ25 test;
5. With excellent filtration performance, Delix hydraulic oil is suitable for ultra-fine filters, and will not be affected by pollutants such as water and calcium, which are the main reasons for clogging of ultra-fine filters. Users can use thinner filters, which means that cleaner hydraulic oil can be used to prolong equipment life;
6. Low friction, Delix has high lubrication performance and low friction, regardless of the high-speed or low-speed operation of the hydraulic system. Under harsh working conditions, it can also avoid stick slip, and achieve more precise mechanical control;
7. Excellent air release and anti foaming performance, carefully selected additives ensure that the air is released quickly and will not produce too much foam. The rapid air release capability can greatly reduce cavitation corrosion and oxidation, and keep the system and hydraulic oil reliable. It has strong water separation ability to avoid floating of water in oil, so as to protect the system and pump from damage.
Low temperature anti-wear hydraulic oil is prepared by isomerization dewaxing to synthesize refined base oil and adding various performance additives. Reduce the cost of equipment maintenance: the pressure containing anti-wear additive can effectively control the wear of gears and bearings under heavy load for a long time, provide a long service life of hydraulic pumps, and reduce the number of maintenance. Excellent low temperature performance: it can be used in harsh low temperature environment, and the pressure of hydraulic system is stable. The excellent anti foaming and air release properties can better meet the requirements of lubricating oil circulation, ensure accurate power transmission, and reduce micro shock at least, thus avoiding the possibility of surface wear due to defects in the lubricating film.
Precautions for anti-wear hydraulic oil:
1. It shall be stored indoors. If it is stored in the open air, the barrel shall be placed horizontally to avoid water immersion and obliteration of the signs on the barrel;
2. This product should not be mixed with water or polluted by foreign matters, otherwise it will cause emulsification, deterioration and failure of oil products;
3. Do not mix with other oils to prevent poor performance;
4. Select the oil with proper viscosity according to the equipment oil regulations;
5. Keep the hydraulic system clean, and timely check the oil sludge and metal chips in the oil tank;
6. The oil shall be changed according to the oil change reference index. When changing the oil, all parts of the equipment shall be cleaned to prevent impurities from mixing into the oil and affecting the use effect;
7. During storage and use, containers and refueling tools shall be clean to prevent oil contamination;
8. This oil is mainly suitable for hydraulic oil pump of steel steel friction pair. When used for hydraulic oil pump with friction pair of other materials, the oil pump manufacturer or oil supply unit shall be available.
What should we do if the hydraulic oil has water seepage?
What should we do if the hydraulic oil enters the water? The hydraulic oil enters the water will lead to the following bad conditions.
① It can react with hydraulic oil to form acid, gum and sludge, and water can also precipitate additives in oil; ② The main effect of water is to reduce the lubricity and accelerate the wear of high stress parts; ③ It can cause adhesion of control valve and cavitation damage on pump or other low-pressure parts; ④ It can also corrode and rust metal.
What should we do if the hydraulic oil enters the water? What is the solution?
The water can be removed by standing and layering; Heat the hydraulic oil slowly to 105 ° C with stirring in the pan, and remove the residual water in the oil (until there is no bubble in the oil); Filter the hydraulic oil with a filter press to remove insoluble mechanical impurities in the oil. In this way, it can be used after processing. If it is really not possible, only replace the hydraulic oil. For hydraulic systems with particularly serious oil pollution or lack of means for dehydration, all hydraulic oils can be replaced. Drain the oil polluted by water, add new oil to the low oil level that can be circulated by the oil pump, and start the oil pump to circulate. And constantly carry out various actions of the hydraulic system to make the water containing oil trapped in various valves and moving parts flow back to the oil tank. Then drain the oil tank and replace it with new working oil. In this way, the machine can be used normally.
