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Why is the pressure of the four-column hydraulic press system unbalanced

Why is the system pressure of the four-column hydraulic press unbalanced? What causes it? Today, let's take a look at the reasons for the pressure imbalance of the four-column hydraulic press system.


1, the pressure imbalance caused by the hydraulic pump of the four-column hydraulic press


(1) The axial and radial clearance of the hydraulic pump increases due to wear;


(2) The "trapped oil" of the oil pump has not been perfectly treated;


(3) The processing and equipping accuracy of the parts in the oil pump is poor;


(4) Some parts in the oil pump are damaged.


2, the pressure imbalance caused by the hydraulic control valve of the four-column hydraulic press


(1) The taper valve of the pilot valve is poorly matched with the seat;


(2) the pressure regulating spring is too soft or damaged;


(3) the damping hole of the main spool is congested, and the spool loses tube manufacturing;


(4) The main valve spool is stuck in the open or closed position by dirt;


(5) When the relief valve is used for remote control, its remote connection channel is too small or leaking;


(6) When the relief valve is used as a unloading valve, the reversing valve that controls the unloading fails.


(7) The hydraulic charge occurs when the oil circuit is switched too fast;


(8) The solenoid reversing valve reversing push rod is too long or too short.


3. Pressure imbalance caused by auxiliary components of four-column hydraulic press


(1) Oil filter congestion;


(2) The liquid channel is too small, and the oil return is not smooth;


(3) the oil viscosity is too thick or too thin.


4. Others


(1) The mechanical part of the four-column hydraulic press is not adjusted well, and the conflict resistance is too large;


(2) Air enters the system;


(3) oil pollution;


(4) Insufficient motor power or insufficient speed;


(5) The pressure indicating device has obstacles.

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