Precautions for daily maintenance of hydraulic cylinders
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1) Relief valve: It can control the hydraulic system to maintain a constant state when reaching the set pressure. Relief valves for overload protection are called safety valves. When the system fails and the pressure rises to a limit value that may cause damage, the valve port opens and overflows to ensure the safety of the system.
(2) Pressure reducing valve: It can control the branch circuit to obtain a stable pressure lower than the main circuit oil pressure. Pressure reducing valve according to the pressure function it controls different, it can be divided into fixed value pressure reducing valve (output pressure is a constant value), fixed pressure reducing valve (input and output pressure difference is a fixed value) and constant pressure reducing valve (Maintain a certain ratio between input and output pressure).
(3) Sequence valve: After an actuator (such as hydraulic cylinder, hydraulic motor, etc.) can be operated, other actuators can be operated in sequence. The pressure generated by the oil pump first pushes the hydraulic cylinder 1 to move. At the same time, the oil inlet of the sequence valve acts on the area A. When the hydraulic cylinder 1 moves completely, the pressure increases, and the upward thrust acting on the area A is greater than the setting of the spring. After the value, the valve core rises so that the oil inlet and the oil outlet communicate and the hydraulic cylinder 2 moves.
1. Regularly inspect the sealing components of the hydraulic cylinder, such as O-rings and gaskets, to ensure that they are intact and undamaged. If there is wear or aging, they should be replaced in a timely manner.
2. Regularly check the liquid level of the hydraulic cylinder and keep it within the specified range. If the liquid level is too low, add hydraulic oil in a timely manner.
3. Regularly inspect the connection parts of the hydraulic cylinder, such as oil pipes and joints, to ensure their tightness and reliability. If there is any looseness, it should be tightened in a timely manner.
4. Regularly clean the outer surface of the hydraulic cylinder to prevent dust, sand, and other debris from entering the interior of the cylinder and affecting its normal operation.
5. Regularly inspect the surface of the piston rod of the hydraulic cylinder, and promptly repair or replace it if there are scratches or wear.
6. Regularly inspect the hydraulic system of the hydraulic cylinder, and promptly handle any problems such as oil leakage or unstable pressure.
7. When the hydraulic cylinder is not in use for a long time, its hydraulic oil should be drained to avoid oil aging, deterioration, and affecting the normal operation of the hydraulic system.
8. When repairing or replacing hydraulic cylinders, attention should be paid to safety to avoid sudden movement or pressure release of the hydraulic cylinder, which may cause personal injury or equipment damage.
Classification of pressure control valves
The pressure control valve is a general term for pressure-generating valves. Divided into use by the overflow valve, pressure reducing valve and sequence valve.