What is the installation method of piston ring?

In the parts of the engine, the role of the piston ring is very subtle. A slight defect will affect the performance of the whole engine. Therefore, the installation of the piston ring should be extra careful. If it is improperly installed, it will cause various faults of the engine, therefore, the working efficiency of the piston ring cannot be fully exerted. The following is the installation method of the piston ring. You must pay attention to it. Before installation, the piston ring and ring groove shall be thoroughly checked for cleanliness before installation, and shall be thoroughly kept clean during installation and final assembly. The inner diameter of the cylinder should be measured before assembly. The adaptability of the piston ring to the cylinder is limited, the wear and deformation degree of the old cylinder, the machining accuracy of the new cylinder, etc, they must be checked for compliance. Piston ring installation method steps, first, Mark YL, Y surface must be upward. Second, the maintenance of flatness during installation. Air tightness is the most important work efficiency of piston rings. If it is twisted up and down, it will produce permanent deformation, resulting in a complete seal in the ring groove. When the piston ring is stretched out by hand and installed in the ring groove, it is easy to produce distortion. Due to the axial distortion caused by the expansion stress, the ring is stressed in the upper and lower directions, and sometimes the piston ring is broken, therefore, attention must be paid to keeping the piston ring flat and upright, and only the correct tangential force should be used at the opening as much as possible, so the disassembly and assembly tools must be used for installation. Three, the expansion limit of the free opening installation, the opening expansion can not exceed eight times the thickness, otherwise it will exceed the design stress of the ring, so that the piston ring is broken or deformed. Also don't close the opening with your hands casually to avoid deformation. 4. It is forbidden to process the open piston ring before use. It is made as a precision part. If the opening is processed casually, the curve shape of the ring changes, causing light leakage and increasing the opening gap, it may lead to oil loading, air leakage and pressure reduction, etc. Five, the installation of oil scraping ring (1) The three-piece steel oil scraping ring first installs the elastic lining ring in the ring groove of the oil scraping ring, completely butts the end of the lining ring, and then presses it with the thumb when the end of the lining ring is completely docked, stagger the opening of the upper scraper ring and the end of the lining ring to the left by 90 degrees, and load it around. Then, the opening of the scraper ring and the end of the lining ring are staggered 90 degrees to the right and loaded into the lower scraper ring. After assembly, check whether the piston ring can rotate flexibly in the circumferential direction. (2) The oil scraping ring with a spiral spring is disassembled, and the interface of the spiral lining ring shown in the figure is rolled in the first oil scraping ring ring groove, and then the two ends of the lining spring are connected, finally, the oil scraping ring body is installed on the spiral lining spring, and the oil scraping ring cut must be on the opposite side of the lining spring interface. Six, the installation status inspection, two rings, one ring sequential installation, dislocation 180. Seven, after the piston ring is installed, check again whether the specified piston ring is installed in the specified ring groove, sequence, position, etc. 8. The piston is loaded into the cylinder. When the assembled piston ring piston is loaded into the cylinder, the cylinder, piston and piston ring should be well coated with engine oil, and then the piston ring should be fully closed to the cylinder diameter, load the piston into the cylinder. Nine, the piston ring is taken out of the ring groove, and the piston ring is removed. If it is intended to be reused, it should be taken out with the piston ring tool as in installation and carefully operated. If the piston ring is bonded in the ring groove, before taking it out, be very careful to make the piston ring move freely to avoid damage when taking it out. Ten, the preservation of piston ring piston ring is made of precision machining, because its shape is easy to change, should be placed flat to avoid unstable placement.

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