On the filter of the hydraulic system of pollution preventio[2011/7/8]←Back

Hydraulic system contamination control throughout the hydraulic system design, manufacture, installation, use and maintenance of the whole process, the basic content and purpose mainly through pollution prevention and control measures, the system of pollution remain key hydraulic components in the system pollution within tolerance, so as to achieve a reasonable balance to ensure the hydraulic system reliability and component life. Contaminants in the hydraulic system is equal to the total system with the Central Plains and some contaminants less invasive system to eliminate pollutants out of pollutant a Thus, the hydraulic system oil pollution control measures are mainly two: First, prevent pollutants into the system, the second is to filter oil purification system.  2.3 The location and type of filter     a. Filter in the hydraulic circuit into the off position depends on The purpose of the filter:     As pollution forehead from many different sources of pollution particles only the size and accuracy suitable filter mounted directly to the upstream component, in order to provide maximum protection to the component. If the filter function is to control the pollution degree of the loop filter can be installed in any one in charge of road.     b. Type of filter depends on its location in the system    ① oil filter     To prevent pump oil from the tank when the inhalation of pollutants, usually in the inlet or suction pipe are installed oil filters. Oil immersed in a tank at the bottom of the filter can easily be sucked air pollutants caused by blockage phenomenon, therefore, commonly used in the suction strainer filters its role is mainly used to block large particles of pollutants into the pump, but can also effectively Remove air bubbles suspended in the fluid.    ② pressure oil filter pressure oil filter is mainly used to protect critical system components. It must be able to withstand the maximum system pressure, and can be tolerated in the system generated during the instantaneous pressure. The filter in the pressure difference is not very strict limitations.     ③ back to the oil filter back to the oil filter is generally low-voltage devices can be installed in the return line or tank, the system only to control the pollutants generated    ④ fuel tank vent filter system at work because people can absorb a considerable amount of abrasive contaminants, so the installation of ventilation filter is necessary but sufficient flow capacity to ensure smooth fuel tank ventilation.     A hydraulic system to prevent pollution     1.1 cleansing pollutants     Components and systems for a thorough cleaning, processing and assembly process to eliminate residual contaminants 1.2 pollutants intrusion into the system to take measures to prevent pollution, control of pollutants an intrusion from the outside     a. Breathing hole in the fuel tank installed high performance air filter     b. New oil injection system must undergo a rigorous filtering;     c. High-performance sealing components.     1.3 the use of high-performance oil filter     In the hydraulic system used high-performance oil filter, so that it constantly at work filtering internally generated and external intrusion of contaminants    2 hydraulic system contamination control     From a technical and economic point of view to completely remove the pollutants in the oil system is not realistic is the most practical choice through effective pollution control measures accompanied the dye to the fluid and system components of the pollution degree of tolerance reached between reasonable balance. Thus a reasonable choice of effective control of the filter has become the primary problem of oil pollution 21 The role of the filter    Filter in the hydraulic system in the role of the following two: First, the pollution control element is to prevent wear of two pollutants cause failure accompanied the former filter requires a high enough accuracy in principle, the filter should be able to effectively filter size close to the pollution sensor key deputy campaign dynamic film thickness of particulate pollutants. Such filters assume the main filtration system, usually installed in the system pressure and return line in oil. The latter role of the filter main role is to protect the lower precision of the individual components, to prevent large particles of pollutants into the components caused by the sudden damage or component failure action. Another filter supporting role, is through the filter accumulates on the analysis of the types of pollutants, to help find the wear and tear parts, early failure risk analysis, timely appropriate treatment, preventive measures 2.2 Filter selection principles     a. With large enough capacity of the pressure loss through the oil     b. Filtration to meet the design requirements;     c filter has sufficient strength and dirt holding capacity;     d. Good corrosion resistance can filter the specified time and temperature to work effectively;     e. Filter replacement, easy cleaning and maintenance    In the choice of the main filter system to determine its accuracy should be considered key components in the system can withstand the oil pollution, the system intrusion of pollutants from the working conditions and other factors as appropriate pollution control point of view of wear, the accuracy of the filter should be to ensure the effective filter size close to the device movement dynamic film thickness of the grain to pay because the size of the particles into motion once the deputy to ask gap will cause the components inside surface wear and to smell the gap increases, so that the larger size particles into space, causing further wear and tear, resulting in severe wear with Chain reaction eventually leading to component failure. Filter size or flow of traffic is generally determined according to the system, but also consider the life of the filter. Rate of contaminant intrusion in certain conditions, the hydraulic system depends mainly on oil pollution filtration filter filter filter performance, however, are often subject to a number of practical factors such as fluctuations in the hydraulic system flow and filter cartridge bypass leakage will reduce filter performance filter