The magnetic filter adopts strong magnetismCombined with a blocking filter screen, it has an adsorption force 8 times that of general magnetic materials. It has the ability to adsorb micrometer sized ferromagnetic pollutants under instantaneous liquid flow impact or high flow rate state, and can overcome the re adsorption of ferromagnetic pollutants under high-speed and large impact, thereby avoiding hydraulic component jamming or friction wear, extending the service life of hydraulic components and hydraulic systems, and enhancing the reliability of hydraulic systems. Its center is a cylindrical magnetic rodThe magnetic rod is covered with non-magnetic material on the outside, and several iron rings are wound around the cover. The iron rings are connected by copper strips, and a certain gap is maintained between each iron ring. When ferromagnetic impurities in the hydraulic medium pass through the gap between the iron rings, they are adsorbed on the iron rings, thus playing a filtering role. For easy cleaning, the iron ring is divided into two halves. When impurities block the gap, the iron ring can be removed for cleaning and then reinstalled for repeated use. Magnetic filter element can also be combined with other filter materials to form a composite filter element for paper on the return oil circuitThe filter paper element is composed of an inner and outer cylinder and an oil filter paper sandwiched in the middle, which are bonded together. The inner and outer cylinders are rolled from thin steel plates, with many oil filled circular holes punched on the plates; Fold the filter paper into a star shape to increase the flow area. The central rod of the filter element is equipped with many magnetic rings and nylon spacersfilter element.
In recent years, with the increasing development of China's automobile and home appliance industries, most domestic automobile and home appliance manufacturers have begun to pay more and more attention to the surface cleanliness of steel plates. The two main production processes that affect the surface cleanliness of strip steel are cold rolling and degreasing cleaning. During cold rolling of strip steel, emulsion (mainly composed of rolling oil) is sprayed on the surface of the strip steel and rolling rolls to lubricate and cool them; On the other hand, due to the grinding of the rolling mill on the surface of the strip steel, a large amount of iron powder is generated and adheres to the strip steel. However, suitable rolling oil and optimized rolling process are used in the cold rolling production process, and sodium hydroxide is used in the degreasing and cleaning sectionA type of cleaning agent can easily remove residual rolling oil, while iron powder is difficult to remove due to its inherent characteristics. Therefore, controlling and removing the amount of residual iron powder on the surface of the steel strip is a difficult point in controlling the cleanliness of the steel strip surface. Practice has proven that there are various methods and approaches to control and remove residual iron powder during cold rolling production and degreasing cleaning processes; In cold rolling production, selecting appropriate rolling oil, allocating the reduction rate of each stand (or pass) reasonably, chrome plating on the rolling mill rolls, and the working mechanism of magnetic filters are all important; During the degreasing process, appropriate degreasing solution should be selected, brush roller bristles should be strengthened, cleaning temperature and speed should be adjusted, and the working mechanism of the magnetic filter should be considered.