1. The use and precautions of the oil cylinder:
1) When disassembling the cylinder, pay attention to whether the sealing ring is excessively worn, aged and loses elasticity, and whether the lip is damaged.
2) Check the surface of the cylinder barrel, piston rod, guide sleeve and other parts for longitudinal draw marks or excessive unilateral wear and repair.
3. Common faults and causes of hydraulic cylinders:
1) Hydraulic rod crawling:
A. Due to air intrusion.
B. The cylinder head V-shaped seal is too tight or too loose.
C. The coaxiality of the piston rod and the piston is poor.
D. The piston rod is bent, etc.
2) Hydraulic rod impact:
A. The gap between the piston and the cylinder barrel is too large due to the use of gap sealing.
B. The throttle valve is out of function.
C. The one-way valve buffered at the end fails and has no buffering effect.
3) The lifting speed of the hydraulic rod decreases:
A. The matching clearance between the piston and the cylinder is too large, so that the high and low pressure chambers can communicate.
B. The working section is not uniform, causing local geometrical errors and losing the tightness of the high and low pressure chambers.
C. The oil seal of the piston rod at the cylinder end is too tight or the piston rod is bent to increase the friction.
D. Severe strain on the cylinder wall.
E. The oil temperature is too high, the viscosity decreases, and the leakage increases, causing the oil cylinder to slow down.
4) Leakage of hydraulic oil:
A. The O-ring between the cylinder head and the cylinder barrel is damaged or failed.
B. The guide sleeve is cracked.
C. The seal between the guide sleeve and the piston rod is damaged.
D. Damage to the surface of the piston rod, etc.
Post time: Dec-28-2020