Hydraulic press machine is a kind of hydraulic press that uses special hydraulic oil as working medium and hydraulic pump as power source, and relies on the force of the pump to make hydraulic oil enter the cylinder/piston through the hydraulic pipeline, and then there are several sets of seals in the cylinder/piston that cooperate with each other. The seals at different positions are different, but they all play a role in sealing, so that the hydraulic oil cannot leak.
The hydraulic system of the hydraulic press machine is unavoidable in actual production due to the start-stop hydraulic shock, which seriously affects the working efficiency of the hydraulic press. Therefore, we should take active measures to deal with it. The fundamental way to avoid abnormal high pressure is to set a relief valve in the circuit and slow down the hydraulic pressure. shock.
1. The hydraulic press machine from professional hydraulic press machine suppliers is equipped with a relief valve in the hydraulic circuit to avoid the circuit with abnormal external force and high pressure. When the cylinder 1 is stopped, the pressure in the cylinder rises due to inertia, and a relief valve is provided to avoid abnormal high pressure. Avoid circuits in which the components do not operate and cause abnormally high voltage. When the cylinder 2 is lowered, if the balance valve 1 fails and does not operate, abnormal high pressure occurs on the piston rod side, and the relief valve 3 is installed to avoid this situation. Avoid loops with abnormally high pressures when stopped. When the hydraulic motor 2 drives the load with large inertia, and the reversing valve 1 returns to the neutral position, a large hydraulic shock occurs, and the brake valve 3 is set to discharge the compressed high-pressure oil, and at the same time, it can pass through the one-way valve from the oil tank. Suction oil fills the vacuum in the oil line on the other side to prevent cavitation.
2. Slow down the hydraulic shock, use the flow valve to slow down the hydraulic shock circuit. When starting, the electro-hydraulic reversing valve 1 and the electromagnetic reversing valve 2 change directions together, the opening of the flow valve 3 is slowly opened, and the motor 5 moves slowly. When stopping, the opening of the flow valve 3 is controlled by the electromagnetic reversing valve 2 to slowly close, so that the motor speed is slowed down. At this time, the electro-hydraulic reversing valve 1 is in the center position, and the motor stops completely. Acceleration and deceleration moments are adjusted by saving equipment. Alleviating hydraulic shock can also be accomplished by setting the hydraulic cylinder end point buffering method and stroke saving control.
Slowing down the hydraulic shock of the hydraulic press can also be achieved by setting the short-point buffer measures of the hydraulic cylinder and stroke throttling control. Different from the hydraulic roll bender, a relief valve is set in the hydraulic circuit of the hydraulic press, which is a circuit to prevent abnormal external force and high pressure. When the hydraulic cylinder is stopped, the pressure in the cylinder rises due to inertia, and a relief valve is provided to prevent abnormal high pressure.