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Risen Machinery: Reasons for common failure of hydraulic cylinders and maintenance methods

There are five common reasons for the failure of hydraulic cylinders in general.


Let's discuss the reasons and the corresponding maintenance methods together.



The five common causes of hydraulic cylinder failure are:


1. The control pressure of the hydraulic system is too low;


2. Throttling resistance in the control pipeline may be too large, the flow valve is not adjusted properly, the control pressure is inappropriate, and the pressure source is dry.


Disturb


3. When the flow valve or directional valve spool is blocked or the valve hole is blocked, the hydraulic cylinder is prone to malfunction or malfunction;


4. The piston rod is stuck with the cylinder or the hydraulic cylinder is blocked;


5. Air in the hydraulic system.

 

The corresponding maintenance treatment method is:


1. The control pressure of the hydraulic system is too low; the throttle resistance in the control pipeline may be too large, the flow valve is not adjusted properly, and the control pressure


Unsuitable force, the pressure source is disturbed; at this time, the control pressure source should be checked to ensure that the pressure is adjusted to the system requirements


value;


2. When the flow valve or directional valve spool is blocked or the valve hole is blocked, the hydraulic cylinder is prone to malfunction or malfunction;


At this time, you should check the contamination of the oil and check whether the dirt or colloidal deposits are blocking the valve core or blocking the valve.


Holes to check the valve body for wear;


3. The piston rod is stuck with the cylinder or the hydraulic cylinder is blocked. At this time, the hydraulic cylinder will not move or act no matter how it is manipulated.


At this time, check whether the piston and piston rod seals are too tight, and whether they have entered the dirt and colloidal deposits: the piston rod and the


Whether the axis of the cylinder is aligned, and whether the wearing parts and seals have failed.


4. Residual air in the hydraulic cylinder. 20-30min ,充 Repair measures: Make the moving parts reciprocate rapidly for 20-30min at full load without charge.


Remove air.


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