How to control contamination of hydraulic fluid? What are the control measures for hydraulic oil con

Pollution and control of hydraulic oil: After the hydraulic system works for a period of time, due to management, maintenance and other factors, the hydraulic oil will be polluted to varying degrees, which will often cause the hydraulic system to fail and lose its ability to work, so it is very important to control the pollution of hydraulic oil. (1) Pollution hazards: Contamination of hydraulic oil refers to the impurities contained in hydraulic oil such as water, air, tiny solids, and rubber viscosity.

After the hydraulic oil is polluted, it will have adverse consequences on the hydraulic system, mainly including: 1) solid particles and colloidal products block the oil filter, making it difficult for the pump to absorb oil and produce noise; Plugging the small holes and gaps of the valve makes the performance of the valve degrade and the operation fails; Abrasion to the seal can cause leakage. 2) The mixing of water and air will reduce the lubrication performance of the hydraulic oil and cause it to oxidize and deteriorate; Cavitation occurs, accelerating the corrosion of components; It also causes the hydraulic system to vibrate, crawl and other phenomena.

2) The causes of pollution are many reasons for the pollution of hydraulic oil, and the impurities in the oil are mainly invaded by the outside world and produced in the working process. 1) The pollutants left during the installation or repair of the hydraulic system mainly include iron filings, burrs, sand particles, abrasives, welding slag, rust, paint slag, cleaning liquid, etc. 2) Pollutants mixed in from the external environment, mainly air, dust, water droplets, chips, cotton yarn, emulsion, etc.

3) The self-generated pollutants generated in the working process are mainly metal particles, rust spots, gelatinous products after deterioration of hydraulic oil, peeling products of coatings and seals, etc. (3) Pollution controlIn order to prolong the service life of hydraulic components, ensure the reliable operation of the hydraulic system, and prevent hydraulic oil pollution, it is more practical to control the pollution of hydraulic oil within a certain limit. The main measures are as follows:

1) Strive to reduce external pollution. The hydraulic system should be strictly cleaned before and after assembly, the air filter should be added to the air tank ventilation, the oil filter should be passed through the oil tank when filling the oil tank, and the maintenance and disassembly of the components should be carried out in the dust-free area. 2) Filter out the impurities generated by the system.

The oil filter installed in the relevant part of the system should be cleaned regularly and the filter element should be replaced if necessary. 3) Control the temperature of the hydraulic oil. Avoid the working oil temperature of the hydraulic oil from being too high, and prevent the oil from oxidizing and deteriorating and producing various products.

The working temperature of the general hydraulic system should be controlled below 65, and the hydraulic system of the machine tool should be lower. 4) Check and change the hydraulic oil regularly. At regular intervals, the hydraulic oil in the system is sampled and inspected to analyze whether its pollution degree is still within the allowable use range of the system, and if it does not meet the requirements, it should be replaced.

The entire hydraulic system must be thoroughly cleaned before the oil change.

Set up the fuel tank reasonably.

Carefully clean the components, tubes and systems.

Correctly select and use the appropriate mesh diameter oil filter.

Choose high-quality lubricants.

Equipped with an air cleaner to prevent contaminants from entering the cylinder.

A: It is never recommended to mix two different additive formulations in the same system, which may jeopardize the proper performance of the additives of the two oils, and may cause corrosion of parts and increase mechanical wear. If the viscosity of the two mixed oils is the same, they may be able to get along well in the short term.

If you have to mix AW and R&O until the next oil change interval before making any other arrangements, please take the following precautions during this period:

Observe whether there is more silt in the short term, whether the hydraulic oil is not easy to defoam and tends to emulsify.

It is necessary to flush the oil channel, oil grains, and oil cylinders, because there are usually 4 to 5% old oil remaining in the pipeline during the oil change.

Check the results of the oil analysis regularly to ensure that the oil is stable.

The specific measures of the bank are as follows:

1. Hydraulic pulse-sensitive oil circuit filter, oil absorption, oil return, pressure oil circuit filtration;

2. Regularly extract oil samples and test them with a professional oil pollution particle detector to monitor the degree of oil pollution;

3. For some hydraulic parts, valves, cylinders, O rings, etc., they should be washed with oil when installed after disassembly, so as to prevent new pollutants from being brought into the oil road.

The details are as follows.

It will lead to the contamination and wear of hydraulic wrench components, and various pollutants in the oil will cause various forms of wear of the components, and solid particles will enter the moving pair clearance, causing cutting wear or fatigue on the surface of the parts. Solid particles that lead to the blockage of hydraulic wrench components and clamping faults block the gap and orifice of the hydraulic valve, causing the valve core to be blocked and clamped, affecting the working performance, and even leading to serious accidents. Accelerating the Disadvantages of Oil Performance in Hydraulic WrenchCalming the water and air in the hydraulic wrench oil with its thermal energy is the main condition for oil oxidation, and the metal particles in the oil play an important role in the oxidation of the oil.

Hydraulic oil is the hydraulic medium used in the hydraulic system that uses the pressure energy of the liquid reed wax sliding body, which plays the role of energy transfer, anti-wear, system lubrication, anti-corrosion, anti-rust and cooling in the hydraulic system. For hydraulic oil, first of all, it should meet the requirements of the viscosity of the liquid at the working temperature and the starting temperature of the hydraulic device, because the viscosity change of the lubricating oil is directly related to the hydraulic action, the transmission efficiency and the transmission accuracy of the wax, and the viscosity temperature performance and shear stability of the oil should meet the various needs of different uses. There are many types of hydraulic fluids and different classification methods, and for a long time, it has been customary to classify them by use, but also according to the type of oil, chemical composition or flammability.

These classification methods only reflect the earning of oil products, but they are not systematic and difficult to understand the interrelationship and development of oil products.

Summary. Hello, dear, it's a pleasure for you to ask this question What are the management measures to prevent hydraulic oil pollution:1

Hydraulic oil circuit filter, oil absorption, oil return, pressure oil circuit filtration. 2.Oil samples are regularly extracted and tested with a professional oil pollution particle detector to monitor the degree of oil pollution.

3.For some hydraulic parts, valves, cylinders, O rings, etc., should be cleaned with oil during installation after disassembly to prevent new pollutants from being introduced into the oil supply circuit.

Hello, dear, it's a pleasure for you to ask this question What are the management measures to prevent hydraulic oil pollution:1Hydraulic oil circuit filter, oil absorption, oil return, pressure oil circuit filtration.

2.Oil samples are regularly extracted and tested with a professional bright and shivering oil pollution particle detector to monitor the degree of oil pollution. 3.

For some hydraulic parts, valves, cylinders, O rings, etc., they should be cleaned with oil when installed after disassembly to prevent new pollutants from being introduced into the oil circuit.

Hydraulic oil is the working medium of the hydraulic system, whether the hydraulic oil is clean or not, not only affects the working performance of the hydraulic system and the service life of the hydraulic components, but also directly relates to whether the agricultural machinery can work normally. At least 75% of hydraulic system failures are caused by unclean hydraulic fluid. Therefore, it is important to prevent contamination of hydraulic fluids.

Insoluble impurities mainly refer to mechanical impurities, including dirt particles entering from the outside of the system and impurities generated inside. The core dirt particles entering from the outside of the system include the oxide layer and sand particles remaining in the pipes, as well as chips, cotton yarn, rubber, etc., which are mixed in during processing, assembly and inspection of parts. Most of these impurities are in suspension and are insoluble impurities.

The infiltration of moisture and air or the mixing of coolant is also a kind of pollution to the oil, and it is also a kind of external dirt.

There are a variety of particulate contaminants in hydraulic fluids, most notably solid particulate matter, but also water, air, and harmful chemicals. Among them, the particulate matter with the greatest impact can be mainly classified in two directions: first, the relevant components of the hydraulic system, such as the hydraulic components including hydraulic oil; The second is the intrusion of the outside world in the process of use and maintenance.

1. The cleanliness of the hydraulic oil (new oil) is not enough to introduce particulate matter.

There are two main aspects of particulate matter in hydraulic oil (new oil): one is caused by insufficient control of cleanliness in the hydraulic oil production process, and the other is caused by improper storage of hydraulic oil during transportation and storage.

2. The cleanliness of the hydraulic components is not enough to introduce particles.

From raw materials to manufacturing and then to the hands of users, hydraulic components usually have to go through raw materials (castings) Machining Component assembly Factory testing Painting & Encapsulation Product Packaging A series of processes such as hail storage and transportation, each link is crucial, and improper cleaning and maintenance will cause particulate pollution of hydraulic components. On the other hand, welding slag and welding nodules in the welding process of hydraulic oil tanks, burrs in hydraulic oil pipelines, etc., can become factors of particulate pollution.

3. In the process of assembly and installation of construction machinery and equipment, particles are introduced.

For hydraulic oil, the main way to cause particulate pollution is not effectively controlled in the process of filling hydraulic oil with hydraulic oil before construction machinery leaves the factory. For the assembly process of construction machinery, improper pollution control of particulate matter in the assembly process of each component will cause pollution of particulate matter.

4. Particulate matter generated by the aging of hydraulic oil.

Hydraulic oil will be in high temperature, aerobic, and metal contact environment when working, and the above environment has the conditions for hydraulic oil oxidation, that is, high temperature, oxygen, metal catalysis, therefore, the oxidation of hydraulic oil in the process of use is inevitable. The oxidation of hydraulic oil usually leads to the polymerization reaction of some oxidation process products, and eventually produces paint film source deficiency and oil sludge, which in turn has an impact on the hydraulic system.

5. Improper wear and maintenance of the equipment during use introduce particulate matter.

The introduction of particulate matter during the use of equipment usually occurs in the moving parts of the hydraulic system, such as pumps, valves, hydraulic motors, hydraulic cylinders, etc., mainly caused by wear, and it is also possible to introduce pollutants into the hydraulic system due to improper sealing between dynamic and static parts when the hydraulic cylinder is working in telescopic work. Improper maintenance will also introduce pollutants, such as in the process of equipment maintenance, oil change, parts replacement, etc., the working environment has more particulate matter, or in the process of parts installation, there is no attention to the effective control of particulate pollution, and the hydraulic system filter failure or unscheduled replacement may introduce particulate matter.

1. Solid pollutants: pipes from the hydraulic system, hydraulic components such as hydraulic cylinders, hoses, pumps, and manes.

The capacity, valve, hydraulic oil tank, etc., is not washed before the system is used, and when the hydraulic system is working, pollutants will enter the hydraulic oil.

2. Pollutants invaded by the outside world: air, water, dust, and solid particles from the outside world enter the hydraulic oil through the piston rod of the hydraulic cylinder, hose joint, hydraulic oil tank, air filter, etc. during the working process of the hydraulic system.

3. Internal pollutants: the assembly, operation, debugging and deterioration of hydraulic oil of the hydraulic system also continue to produce pollution, which directly enters the hydraulic oil, such as the wear particles of metal and sealing materials, the particles and fibers that fall off the oil absorption and return filter elements, the colloidal matter generated by the hydraulic oil due to the increase in oil temperature and oxidation deterioration, and the inhalation of air caused by the poor sealing of the oil suction pipeline.

4. Pollution caused by maintenance, maintenance and repair: Replacing the filter element and hydraulic oil, cleaning the oil tank, repairing and disassembling the hydraulic cylinder and valve in the normal maintenance of the equipment will also make solid particles, water, air, fibers, etc. enter the hydraulic oil.

There are iron filings worn into the metal inside the excavator, and there is the excavator's long-term working temperature rises, the hydraulic oil is oxidized, and the reflux filter element and pipeline filter element need to be replaced once every 500 hours.

1. Solid pollutants.

2. Pollutants invaded by the outside world.

3. Pollutants are generated inside.

4. Pollution caused by maintenance, maintenance and repair.

The contamination of the working medium has a great impact on the reliability of the hydraulic system, and most of the failures in the operation of the hydraulic system are caused by the unclean oil. Therefore, it is particularly important to use and prevent contamination of hydraulic fluids correctly. Contamination of oil, refers to the presence of solid particles, water, microorganisms and other impurities in the oil, and the presence of these impurities can lead to the following problems:

Solid particles and colloidal products clog the oil filter, making the hydraulic pump difficult to suction oil, making noise Blocking the small holes or gaps of the valve components, making the valve components malfunction.

Tiny solid particles can accelerate the wear of the surface of the sliding parts, making the hydraulic components not working properly and scratching the seals and increasing the leakage flow.

The mixture of water and air will reduce the lubrication of the hydraulic fluid, accelerate its oxidation and deterioration, produce cavitation, accelerate the damage of hydraulic components, and cause vibration and crawling of the hydraulic transmission system.