What kind of material is the hydraulic cylinder of loader?
2, the cause of the wear and tear is mainly caused by insufficient lubrication. The piston and piston ring move at high speed in the cylinder mirror. Under lubrication. Between the working face can not form the oil film, both friction surface has extremely small part, the metal direct contact, because the friction formation partial high heat dissipation does not walk, but when accumulates to a certain extent, will cause two people to melt the adhesion. At this time, if the oil film can be timely recovery, cleaning and cooling, so that these tiny weld parts fall off without expansion; if the oil film recovery slow, weld expansion, resulting in abnormal melting wear occurred in a large area, which is usually called cylinder. Melting wear generally occurs on the upper part of the cylinder mirror, near the first ring at the top dead point, where localized metal melting is stuck and uneven uneven edges of groove marks and folds. Cylinderscoring phenomenon is easy to happen in production without running internal combustion engine immediately load working conditions. Because the internal combustion engine cylinder is not thicker, the oil film is not easy to form, and the cylinder mirror surface and the piston surface convex place often have tiny metal contact, thus causing melting wear and even killing phenomenon.
There are two kinds of damage to the cylinder liner: the abrasion of the cylinder mirror and the corrosion on the outer wall of the cylinder liner. First, the cylinder mirror wear in the following situations: normal wear, abrasive wear, melting wear and corrosion, wear and so on. 1, normal wear, piston ring and cylinder mirror friction caused by, also known as friction and wear. The maximum wear position of the cylinder mirror surface is the position of the piston near the first ring at the top dead point, which often forms an obvious step. Because of this position, the maximum pressure of the cylinder piston ring on the mirror, the upper end of the cylinder with high temperature, abrasion resistance of metals decreased, at the same time, the piston at TDC speed is zero, the oil film is not easy to form, so the lower part of the cylinder wear mirror also larger. Abrasive wear is caused by heavy dust or carbon deposits in the air. Dust is sucked from the upper part, and the carbon deposits are formed in the upper part, so the upper part of the cylinder mirror is relatively worn. When the engine oil is thrown from bottom to top, the hard particles are affected by gravity, so the lower part of the cylinder is more worn. Abrasive wear is characterized by parallel, rectilinear strains of pulling from the cylinder mirror along the direction of the piston.
