Precautions for hydraulic cylinder device and how to accurately protect and maintain

Precautions for hydraulic cylinder device and how to accurately protect and maintain 1. Precautions for hydraulic cylinder device 1. The hydraulic cylinder and the surrounding environment should be clean. The fuel tank must be sealed to avoid contamination. Pipeline mechanical seals and fuel tanks should be cleaned up to avoid falling oxide scale and other sundries. Use lint-free cloth or special paper for cleaning. Can not try twine and adhesive as sealing materials. The hydraulic oil is requested according to the plan, and pay attention to the change of oil temperature and pressure. When there is no load, unscrew the exhaust bolt to exhaust. 2. The connection of piping shall not show signs of slack. 3. The base of the hydraulic cylinder must meet the rigidity of the mechanical seal, otherwise the cylinder tube will bow upwards when pressurizing, causing the piston rod to bend. 4. Before installing the hydraulic cylinder into the system, compare the parameters on the hydraulic cylinder label with the parameters when ordering mechanical shaft seals. 5. The axis of the base of the movable cylinder with fixed feet should be concentric with the center line of the load effect force to avoid causing lateral force. The lateral force simply wears the seal and damages the piston. For the hydraulic cylinder device of the moving object, keep the cylinder and the moving object in parallel with the direction of movement on the guide rail surface, and the parallelism is usually not greater than 0.05mm/m. 6. The sealing gland screw of the hydraulic cylinder of the device should be tightened to ensure that the piston moves flexibly in the full stroke, without obstruction and unevenness. Screws that are too tight will add resistance and accelerate wear; too loose will cause oil leakage. 7. For hydraulic cylinders with exhaust valve or exhaust rosette, it is necessary to install the exhaust valve or exhaust rosette at the highest point in order to remove air. 8. The axial ends of the cylinder cannot be fixed, and one end must be kept floating to avoid the influence of thermal expansion. Because of the effect of factors such as hydraulic pressure and thermal expansion in the cylinder, it has axial elasticity. If the two ends of the cylinder are fixed, all parts of the cylinder will be deformed. 9. The clearance between the guide sleeve and the piston rod must meet the requirements. 10. Pay attention to the parallelism and straightness of the cylinder and the guide rail, the deviation should be within 0.1 mm/full length. If the full length of the bus bar on the hydraulic cylinder is out of tolerance, scrape the bottom surface of the hydraulic cylinder support or the contact surface of the machine tool to reach the request; if the side bus bar is out of tolerance, the hydraulic cylinder and fixing screws can be loosened, the positioning lock is removed, and the calibration is The accuracy of its side bus. 11. When disassembling the hydraulic cylinder, be careful not to damage the threads on the top of the piston rod, the threads of the cylinder port and the appearance of the piston rod. It is strictly forbidden to hammer the surface of the cylinder tube and piston. If the surface of the cylinder bore and piston is lost, sandpaper is not allowed. The hydraulic cylinder should be carefully ground with fine oil and the surrounding environment should be clean. The fuel tank must be sealed to avoid contamination. Pipelines and fuel tanks should be cleaned up to avoid falling oxide scales and other debris. Use lint-free cloth or special paper for cleaning. Can not try twine and adhesive as sealing materials. The hydraulic oil is requested according to the plan, and pay attention to the change of oil temperature and pressure. When there is no load, unscrew the exhaust bolt to exhaust. 2. Accurate protection and maintenance. At the top of the list, the hydraulic oil should be replaced regularly during the use of the cylinder, and the filter screen of the system should be cleaned to ensure cleanliness and extend the service life. Second, each time the oil cylinder is used, it must be fully extended and fully retracted for 5 strokes and then run with load. Why do you do this? Doing so can exhaust the air in the system and preheat the systems, which can effectively avoid the presence of air or water in the system, forming the appearance of gas explosion (or scorch) in the cylinder body, which will harm the seals and form a leak in the cylinder. Wait for something wrong. Third, control the temperature of the system well. Excessive oil temperature will reduce the service life of the seals, and the high oil temperature for a long time will cause the seals to undergo permanent deformation or even complete failure. Fourth, protect the appearance of the piston rod to avoid bumps and scratches on the seals, and often clean up the mud and sand on the dust ring of the cylinder dynamic seal and the exposed piston rod to avoid sticking to the surface of the piston rod. Dirt enters the cylinder and damages the piston, cylinder or seal. Fifth, often check the joints of the threads, bolts, etc., and find that they are loose and fastened immediately. Sixth, the joints are often smooth to avoid rust or abnormal wear in an oil-free state. Keywords: mechanical seals, mechanical seals, mechanical shaft seals