What are the hydraulic system structures included?

The hydraulic system consists of two parts: signal control and hydraulic power. The signal control part is used to drive the control valve action in the hydraulic power part.

The hydraulic power part is represented in a circuit diagram to indicate the interrelationships between different functional components. The hydraulic source includes a hydraulic pump, electric motor, and hydraulic auxiliary components; The hydraulic control section contains various control valves for controlling the flow, pressure, and direction of the working oil; The execution part contains hydraulic cylinders or hydraulic motors, which can be selected according to actual requirements.

When analyzing and designing actual tasks, block diagrams are generally used to display the actual operating status of the device. The hollow arrow represents the signal flow, while the solid arrow represents the energy flow. The sequence of actions in the basic hydraulic circuit - reversing and spring return of the control element (two position four way reversing valve), extension and retraction of the actuating element (double acting hydraulic cylinder), and opening and closing of the relief valve. For the execution and control components, the presentation is based on the corresponding circuit diagram symbols, which also prepares for the introduction of circuit diagram symbols.

According to the working principle of the system, you can number all circuits in sequence. If an execution component number is 0, the control component identifier associated with it is 1. If the component identifier corresponding to the extension of the executing element is even, the component identifier corresponding to the retraction of the executing element is odd. Not only should the hydraulic circuit be numbered, but also the actual equipment should be numbered in order to detect system faults.

The DIN ISO1219-2 standard defines the numbering composition of components, which includes the following four parts: equipment number, circuit number, component identifier, and component number. If there is only one device in the entire system, the device number can be omitted.

In practice, another numbering method is to continuously number all components in the hydraulic system, and in this case, the component number should be consistent with the number in the component list. This method is particularly suitable for complex hydraulic control systems, where each control circuit corresponds to its system number.