Leakage Cause Analysis
The main causes of hydraulic oil leakage in electro-hydraulic actuators include
Seal Problems
• Aging, cracking, or deformation of seals resulting in loss of elasticity
• Worn, scratched, or damaged seal rings
• Incompatible seal material with hydraulic oil
• Improper seal groove design or machining accuracy exceeding tolerances
Connection Problems
• Loose or improperly tightened bolts
• Loose or improperly installed pipe joints
• Uneven or damaged flange connection surfaces
Shanghai Jwell machinery Workshop co-operation projects
• Scratches, wear, or corrosion on the piston rod surface
• Wear or out-of-roundness of the cylinder inner wall
• Wear of the guide sleeve leading to excessive clearance
Repair Steps
Preparation
• Ensure the hydraulic system is completely depressurized and the power is turned off
• Prepare special tools: seal installation tools, puller, torque wrench, etc.
• Prepare new seals, ensuring the model and specifications are consistent with the original.
Disassembly and Inspection
• Disassemble the hydraulic cylinder and inspect the piston rod surface for scratches or wear.
• Check the smoothness and roundness of the cylinder inner wall.
• Check the clearance between the guide sleeve and the piston.
Seal Replacement
O-ring Replacement:
• Clean oil and impurities from the seal groove.
• Apply hydraulic oil to the surface of the new O-ring to aid installation.
• Ensure the O-ring is fully embedded in the groove without twisting or deformation.
Piston Rod Seal Replacement:
• Use a special tool to remove the old seal.
• When installing the new seal, ensure the lip faces the pressure side.
• Ensure the seal is installed correctly without twisting or damage.
Critical Component Repair
• Minor scratches on the piston rod surface can be repaired with an oilstone.
• Severely worn piston rods require chrome plating or replacement.
• Worn cylinder inner wall requires boring repair.
Installation and Commissioning
1. Correct Installation
• Assemble the hydraulic cylinder in the reverse order of disassembly.
• Tighten the bolts to the specified torque using a torque wrench.
• Ensure all connection points are clean and free of impurities.
2. System Testing
• Slowly start the hydraulic system and observe for leaks.
• Check if the system pressure is normal.
• Test the smoothness of the actuator's operation.
FAQ
Q: How can I trust your company?
A: A:With 30-years-professional design, we can provide you suitable suggestion and lowest price
1. Assessed by third party, national patents and ISO for all equipment, .
2. For our machine, we do very well on belt transport,port handling,hoisting, metallurgical, mining and building machinery..
Q: Is your price competitive?
A: A: Only good quality machine we supply. Surely we will give you best factory price based on
superior product and service.
We attach great importance to technological innovation, and we have a large number of advanced technological achievements and products in the Construction Hoist Elevator Safety Brake industry. We take the market as the guidance, science and technology as the driving force, striving to provide the best products and services to customers. Allow us to move ahead hand in hand and attain win-win situation.
