Introduction to the six commonly used hydraulic circuits

a. Unloading circuit

The main purpose of applying the unloading circuit is to keep the hydraulic pump in no-load operation. A common application scenario is when the actuator is working intermittently or stopped. Common application scenario is when the actuator works intermittently or stops working, the unloading circuit can make the hydraulic oil flow back to the tank from the pump at a very low pressure. Advantages of unloading circuits include increased product life, reduced power consumption, reduced heat generation, etc. ......

There are also many different types of unloading circuits, including unloading circuits with directional valves, unloading circuits with accumulators, unloading circuits with Unloading circuit with solenoid relief valve, unloading circuit with pressure compensation variable pump, etc. ......

b. Pressure control circuit: 

The pressure control circuit in the hydraulic system is mainly used to protect the system from overpressure or underpressure, and to provide a safe environment for the components in the system. The pressure control circuit in the hydraulic system is mainly used to protect the system from over-pressure or under-pressure, and provide the target pressure for the components in the system. Some hydraulic systems contain components that require different pressures to operation. Dual pressure circuits with pressure reducing valves and check valves, pressure reducing circuits, and load balancing circuits are some of the most common types of pressure control circuits in hydraulic systems. c. Speed control circuits

c. Speed Control Circuits

Variable speed circuits - Variable speed circuits may include two flow control valves to change the speed of cylinder movement.

Circuits with proportional electro-hydraulic directional and flow control valves - optimum speed control is achieved by controlling the amount of sliding spool movement in the proportional valve to produce the speed of the cylinder. valve spool movement to produce the optimum speed control. Differential circuits - Differential circuits will produce faster cylinder motion than circuits with a single inflow channel.

speeds compared to a circuit with only a single inflow channel. Precharge circuit - an auxiliary cylinder and precharge valve will be used to produce the pumping function.

d. Filtration circuits: 

The main objective of applying a filter circuit is to keep the fluid flowing at a certain rate while filtering out contaminants in the fluid. contaminants from the fluid. However, when the filter element becomes clogged, it can have a detrimental effect. When the filter is in a different position in the circuit, the filter circuit has many When the filter is in a different position in the circuit, there are many names for the filtration circuit, such as pump filtration circuit, pressure line filtration circuit, return line filtration circuit, pressure line discharge filtration circuit, and pressure line discharge filtration circuit. circuit, pressure line filtration circuit, return line filtration circuit, pressure line discharge filtration circuit and off-line filtration circuit.

e. Synchronization circuits: 

These circuits are used to synchronize the movement of multiple actuators. Synchronization circuits can be subdivided into synchronization circuits with mechanical Synchronized circuits can be subdivided into those with mechanical combinations, synchronized circuits with flow control valves, circuits with flow dividers, circuits with synchronized hydraulic motors, and circuits with synchronized cylinders. The synchronized circuits can be further subdivided into synchronized circuits with mechanical combinations, synchronized circuits with flow control valves, circuits with diverters, circuits with synchronized hydraulic motors, circuits with synchronized cylinders and circuits with servo valves.

f. Booster circuits: 

Hydraulic circuits that use cylinders as boosters, which utilize the piston area ratio between the high and low pressure chambers to Increase pressure