Hydraulic hose failures can cause the machine and the entire system to shut down, resulting in shutdown, costly repairs and other financial losses,so we need to know the reason to make prepartion or extend the its using life.
Reasons of Oil leakage
The quality of the hose is poor
When repairing or replacing hydraulic lines, if inferior hoses are installed in the hydraulic system, due to their low pressure capacity and short service life, the service life will not be long.The poor quality of hard oil hoses is mainly manifested by the uneven thickness of hose wall, reducing the carrying capacity; inferior hoses are mainly poor rubber quality, insufficient wire tensile force, uneven weaving, insufficient carrying capacity, and oil leakage under the impact of pressure oil.
The hydraulic lines are fatigue damaged or aging The observation and analysis of a large number of hard hydraulic pipe breaks shows that the rupture of the hard hose is a kind of fatigue damage, so there must be an alternating load on the hose.
When the hydraulic system works, the hydraulic pipeline should bear high pressure, plus the alternating stress caused by pressure instability, vibration stress caused by vibration of equipment, assembly stress, which concentrates the hard pipe at material defects, corrosion points or damage, and oil leakage.For rubber pipes, aging, harden and crack from high temperature, high pressure, bending and serious distortion, and finally the oil hose blasting and oil leakage.
Bad bending of the hose
In the process of assembling the hard hose, bend the hose according to the specified bending radius, otherwise it will produce different bending internal stress, and gradually produce leakage under the action of oil pressure.