The cause and harm of hydraulic oil pollution

On the causes and hazards of hydraulic oil pollution

hydraulic systems are widely used in various fields of the national economy. Hydraulic oil is like blood to life for hydraulic equipment. Clean hydraulic oil has experienced the same geological layout effect in the circulation flow of the system, which is an important condition to ensure the normal operation and lubrication of mechanical equipment. The pollution of hydraulic oil will affect the normal work of the system and cause excessive wear of components, and even cause equipment failure. Therefore, it is necessary to understand the source of hydraulic oil pollutants and monitor their condition

1 causes of hydraulic oil pollution

hydraulic oil pollution is mainly caused by external and internal reasons. External causes refer to the entry of solid impurities, moisture, other oils or air into the liquid. We will see more materials pressing oil in the future. Internal causes refer to the wear of parts moving in used barnyard grass and the change of physical and chemical properties of hydraulic oil in addition to the pollution caused by the original new oil. Due to the different ways in which impurities invade the hydraulic oil system, the pollution of hydraulic oil can be divided into three types: potential pollution, invasion pollution and regeneration pollution, which are described below

(1) potential pollution: harmful substances such as casting sand, chips, abrasives, weld cleaning, rust flakes, coating flakes, rubber fragments and dust have been hidden in the system before the hydraulic system starts to work. Similarly, the above pollutants will also exist in purchased parts

(2) invasion pollution: during the working process of the hydraulic system, foreign pollutants (such as dust, moisture, heterogeneous oil, etc.) can invade the system through the oil tank vent and oil filler to cause pollution. The reciprocating piston rod injects the oil in the system, the air flowing in the oil tank, splashed or condensed water droplets, and the oil leakage flowing back to the oil tank to make the pollutants invade the system

we can test the shortcomings and organizational changes of materials in smelting and processing. The customer talked about visiting the experimental machine. The machine in our Jinan experimental machine factory looks solid in the process of working. (3) regenerative pollution: refers to the pollutants generated by hydraulic oil in the work of hydraulic system. Such as residual rust of parts, peeling paint flakes, wear particles of moving parts and sealing materials, particles or fibers of filter materials, etc. The products of physical and chemical changes cause metal corrosion to produce particles, rust flakes and other pollutants. Under the action of high temperature and high pressure, oxides, resin grease and other pollutants are generated due to the action of moisture, air, copper, iron and other media

2 harm of hydraulic oil pollution

the types of pollutants in the hydraulic system can be roughly divided into solid particles, air, water, chemical pollutants, etc. Among them, solid particle pollution is the most harmful. The wear and surface fatigue caused by the interaction between solid particles and the surface of hydraulic components can accelerate the wear of components and increase the internal leakage, thus reducing the working reliability of hydraulic pumps, motors, valves and other components and the efficiency of the system. More seriously, it may cause the blockage of hydraulic pumps or valves, throttles or filters, and damage the normal operation of the system. The existence of air, water and chemical pollutants will also deteriorate the hydraulic oil, thereby accelerating the damage of hydraulic components