Working principle and structure of hydraulic system

The working principle and structure of hydraulic systems commonly use connecting components. The rubber hose hydraulic power transmission component is a high-pressure rubber hose assembly, and some parts use circuit diagrams to indicate the interrelationships between different functional components. The hydraulic source contains a hydraulic pump, an electric motor, and hydraulic auxiliary components; The hydraulic control part contains various control valves, which are used to control the flow rate, 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 practical tasks, block diagrams are generally used to display the actual operating conditions of the equipment.

Hollow arrows represent signal flow, while solid arrows represent energy flow.

The action sequence in the basic hydraulic circuit includes the direction change and spring reset of the control element (two position four-way reversing valve), the extension and retraction of the actuator element (double acting hydraulic cylinder), and the opening and closing of the relief valve.

For the execution and control components, the presentation is based on corresponding circuit diagram symbols, which also prepares for introducing circuit diagram symbols.

According to the working principle of the system, you can sequentially number all circuits. If the execution element number is 0, the control element identifier associated with it is 1. If the component identifier corresponding to the extension of the executing element is even, then the component identifier corresponding to the retraction of the executing element is odd.

Not only should hydraulic circuits be numbered, but actual equipment should also be numbered to detect system failures.

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 a device in the entire system, the device number can be omitted.