Precautions for the installation of hydraulic cylinders and how to maintain them correctly?

Precautions for the installation of hydraulic cylinders and how to maintain them correctly? Precautions for the installation of hydraulic cylinders and how to maintain them correctly? 1. The installation precautions of the hydraulic cylinder 1. The hydraulic cylinder and the surrounding environment should be clean. The fuel tank must be sealed to prevent contamination. The mechanical seals and oil tanks for the pipeline kettle should be cleaned to prevent falling off 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 designed according to the design requirements, pay attention to the changes of oil temperature and oil pressure. When there is no load, unscrew the exhaust bolt to exhaust. 2. There must be no slack in the piping link. 3. The base of the hydraulic cylinder must have sufficient rigidity, otherwise the cylinder tube will bow upwards when the kettle is pressurized with a mechanical seal, 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. 5. The central axis of the movable cylinder with a fixed foot base should be concentric with the center line of the load force to avoid causing lateral force, which is likely to cause seal wear and piston damage. When installing the hydraulic cylinder 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 generally not greater than 0.05mm/m. 6. Install the sealing gland screw of the hydraulic cylinder, and its tightening degree is to ensure that the piston moves flexibly in the full stroke, without obstruction and uneven weight. Screws that are too tight will increase resistance and accelerate wear; too loose will cause oil leakage. 7. For hydraulic cylinders with exhaust valve or exhaust rosette, the exhaust valve or exhaust rose must be installed 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 prevent the influence of thermal expansion. Due to factors such as hydraulic pressure and thermal expansion in the cylinder, there is axial expansion and contraction. If both 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 total 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 meet the requirements; if the side bus bar is out of tolerance, you can loosen the hydraulic cylinder and the fixing screws, pull out the positioning lock, and correct The accuracy of its side bus. 11. When disassembling the hydraulic cylinder, take care to prevent damage to the thread at the top of the piston rod, the thread of the cylinder port and the surface of the piston rod. It is strictly forbidden to hammer the surface of the cylinder and the piston. If the surface of the cylinder bore and the piston is damaged, it is not allowed to polish it with sandpaper. It must be carefully polished with fine oil. 1. The hydraulic cylinder and the surrounding environment should be clean. The fuel tank must be sealed to prevent contamination. Pipelines and fuel tanks should be cleaned to prevent falling off iron oxide scale 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 designed according to the design requirements, pay attention to the changes of oil temperature and oil pressure. When there is no load, unscrew the exhaust bolt to exhaust. 2. Correct maintenance and maintenance First, 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 prolong its 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 and cause gas explosion (or scorch) in the cylinder body, which will damage the seals and cause leakage in the cylinder. Wait for failure. Third, control the system temperature well. Excessive oil temperature will reduce the service life of the seals. Long-term high oil temperature will cause permanent deformation of the seals, or even complete failure. Fourth, protect the outer surface of the piston rod to prevent bumps and scratches from damaging the seals. Frequently clean up the dust on the dust ring of the cylinder and the exposed piston rod to prevent sticking to the surface of the piston rod. Dirt enters the cylinder and damages the piston, cylinder or seal. Fifth, check the connections of threads, bolts, etc., and tighten them immediately if they are loose. Sixth, lubricate the joints frequently to prevent corrosion or abnormal wear in the absence of oil.