Since unburned production environment is relatively poor, high levels of dust in the air, coupled with the comparative lack of knowledge of some customers hydraulic contamination caused by hydraulic oil in the transport, storage, use, contaminated oil will cause the device to enter the transmission system interrupt operation malfunction, or even cause damage to the equipment.
How to prevent and control pollution of the hydraulic oil it? 1 kind of hydraulic oil contamination and damage by type of contaminants, oil pollution can be divided into the following categories: solid particle pollution, water pollution, air pollution, and mixing of oil pollution.
1.1 solid particle contamination. The solid particles including dust, slag, rust sheet and metal powder. They use the mixed liquid PRESS with hydraulic oil and the oil flow across the entire hydraulic system, when the valve body through which a sliding clearance is populated dirt, causing movement of spool bradykinesia or interrupted. Second, the hydraulic fluid containing solid particles is similar to an abrasive used in the metal working surface, through the pump when the cylinder and the valve, will increase the wear of the friction pairs, generate new pollution particles will greatly reduce the life of the element a serious threat to the normal operation of the hydraulic system.
1.2 pollution. After a certain amount of water into the hydraulic oil, the oil will become white, the flow of oil is deteriorated, when the moisture content exceeds the zero point one percent, the oil does not have the normal mobility. After the water and oil sulfur or chlorine combined, will produce sulfuric acid or hydrochloric acid, the acid value when oil reached 0.3mgKOH / g, it will corrode metal parts and produce embroideries, form a solid particle contamination, so that the whole the hydraulic system is not working properly, the water itself may be another slow oxidation of the metal, thereby reducing the service life of hydraulic components.
1.3 air pollution. After the hydraulic oil into the air, due to the volume and pressure is inversely proportional to the gas, so as the load changes, the movement of the actuator will be affected; After plugging the inlet filters, hydraulic oil suction resistance greatly increased, which can cause gas corrosion, vibration and noise; air oxidation of the element and also to make the loss of lubricating properties of the hydraulic oil; especially at ambient temperature and pressure conditions, the air can easily cause oxidative deterioration of hydraulic oil, the flow resistance increases, resulting in abnormal actuator in addition deterioration of hydraulic oil can also generate harmful substances will corrode metal parts.
1.4 fats. In the hydraulic system during normal operation, try not to replace fat varieties or grades, when hydraulic oil mixing two different species or grades, due to their different chemical composition, may alter the chemical composition of hydraulic oil to the nature of change.
2 Automatic hydraulic oil contaminated liquid PRESS way oil mixed solid particles mainly due to the fuel tank, pipe fittings residue after processing is not clean, or not fully installed before pickling rust caused. Another solid particles such as dust can also be mixed with oil in the air. Oil mixed with air is mainly due to pipe fittings, hydraulic pumps, control components, hydraulic cylinders and other sealed well or tank bubbles caused. Oil mixed with water, the reason is the air humidity is high (e.g., Guiyang) from the air filter into the tank or the cooling water leakage caused. Hydraulic oil varieties or brands of replacement will cause pollution.