company news about How to Deal with Oil Leaks in fish feed production equipment？

Targeted handling of different leaks in hydraulic systems. Leaks in the hydraulic system of a fish pellet making machine can be divided into fixed leaks (joints, valve assemblies) and moving leaks (hydraulic cylinders, hydraulic pumps), and the handling methods for each have different focuses: First, oil pipe joint leaks, which are the most common fixed leaks, are often caused by loose joints, aging seals, or wear of the joints. When handling this, first shut down the hydraulic pump, release the system pressure, disassemble the joint, check if the seals are aged, and replace them if they are. At the same time, check if the joint threads are worn. If the wear is severe, the joint needs to be replaced. When resetting, wrap an appropriate amount of Teflon tape around the joint threads and tighten the nut evenly (avoid over-tightening to prevent damage to the threads); Second, hydraulic pump leaks are often caused by aging of the pump body gasket, damage to the bearing oil seal, or wear of the pump body. If the leak is due to an aging gasket, replace it with a new one and apply sealant. If the bearing oil seal is damaged, disassemble the hydraulic pump, replace the oil seal, and check the bearing wear. If the pump body is worn, repair or replace the hydraulic pump to avoid insufficient pressure affecting the extruder die control. Thirdly, hydraulic cylinder oil leakage often occurs at the piston rod seal due to piston rod wear and aging seals. To handle this, disassemble the hydraulic cylinder, sand the surface of the piston rod to remove scratches, replace the seal, apply high-temperature resistant hydraulic oil, and then test the smoothness of extension and retraction and the tightness of the seal after resetting. Fourthly, hydraulic valve oil leakage is often due to aging valve assembly seals or worn valve cores. Disassemble the valve assembly and replace the seals; if the valve core is severely worn, replace the hydraulic valve. For example, in a twin-screw extruder, an oil pipe joint in the hydraulic system leaked. After replacing the sealing ring and tightening the joint, the leakage problem was solved, the hydraulic pressure stabilized, and the die opening and closing functioned normally.

Auxiliary handling and pressure regulation of hydraulic system oil leaks. After repairing the leak, auxiliary measures are necessary to prevent the small floating fish feed making machine from leaking oil again: First, replace the hydraulic oil. If the oil is contaminated (with air or impurities), completely drain the old oil, clean the oil tank and oil pipes, and add hydraulic oil of the correct specifications (select anti-wear hydraulic oil suitable for the working pressure of the extruder). Maintain the oil level between 1/2 and 2/3 of the tank mark. Second, bleed the system. After hydraulic system repair, air can easily get into the system, causing pressure fluctuations and increased noise. Start the equipment under no-load and open the bleed valve to release the air until the system pressure stabilizes. Third, adjust the pressure. Check if the hydraulic system pressure is within the rated range (the hydraulic pressure of a twin-screw extruder is usually 3-6 MPa). Excessive pressure will accelerate the wear of seals, leading to oil leaks. Adjust the pressure to the rated value using the relief valve. For example, a feed mill repaired a hydraulic pump leak but failed to bleed the system in time, causing system pressure fluctuations and a slight leak again. After bleeding, the pressure stabilized, and the oil leak problem was completely solved.

Key points for daily maintenance of the hydraulic system of a small fish feed maker machine. Proper maintenance can reduce hydraulic system oil leaks: First, regularly change the hydraulic oil and filter element. Change the hydraulic oil every 1000 hours of operation and the filter element every 500 hours to prevent impurities from clogging the oil passages and wearing down the seals. Second, regularly check the pressure and seals. Check the hydraulic system pressure weekly and check the valve assembly, joints, and hydraulic cylinder seals every 500 hours of operation. Third, keep the system clean to prevent raw material residue and dust from entering the hydraulic system. Regularly clean the surface of the oil tank and oil pipe interfaces. Fourth, avoid overloading the system. Do not allow the hydraulic system to operate above the rated pressure for extended periods to reduce seal wear. Through scientific maintenance, the incidence of hydraulic system oil leaks can be reduced by 70%.

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