What is hydraulic pressure

Hydraulic pressure, the full name of hydraulic pressure, is an engineering discipline that uses liquid to transmit force and control technology. It is widely used in machinery, aerospace, metallurgy, petrochemical and other fields, and is an indispensable part of modern engineering technology. This article will explain in detail what oil pressure is, as well as the working principles and applications of hydraulic systems.

1. Definition of oil pressure

Oil pressure, or hydraulic pressure, is a technology that uses liquid to transmit force and control movement in closed pipelines. It generates, transmits and controls force by utilizing the pressure of a fluid medium (usually oil). The hydraulic system is composed of hydraulic pumps, hydraulic valves, hydraulic cylinders, etc., and realizes power transmission and control through the flow of liquid.

2. Working principle of hydraulic system

The working principle of hydraulic system is based on Pascal's law, that is, in a closed liquid, the increased pressure will be transmitted evenly to all parts of the liquid. Hydraulic systems generally consist of the following basic components:

2.1 Hydraulic pump

The hydraulic pump is the power source of the hydraulic system. It converts liquid pressure into kinetic energy through mechanical movement, and Push fluid into the hydraulic system. Hydraulic pumps are generally divided into different types such as plunger pumps, gear pumps and vane pumps. Choose the appropriate pump according to specific application requirements.

2.2 Hydraulic valve

Hydraulic valves are used to control the flow and pressure of liquid and regulate, distribute and protect the hydraulic system. Common hydraulic valves include check valves, relief valves, throttle valves, etc. By controlling the switching status of the hydraulic valve and adjusting the size of the valve port, various functions of the hydraulic system can be realized.

2.3 Hydraulic cylinder

The hydraulic cylinder is an actuator in the hydraulic system, which converts the pressure of the liquid into mechanical movement. Hydraulic cylinders generally consist of a cylinder, a piston and a seal. The pressure of the liquid drives the piston to move, thereby achieving power transmission and control.

3. Application of hydraulic systems

Hydraulic systems are widely used in various fields. The following are several common application examples:

3.1 Construction machinery

Hydraulic systems in construction machinery are often used in excavators, loaders, bulldozers and other equipment to realize the movement and control of various working devices. Through the hydraulic system, these mechanical equipment can achieve efficient and precise work.

3.2 Aerospace

In the field of aerospace, hydraulic systems are widely used in aircraft, rockets and other aircraft middle. Hydraulic systems can be used in aircraft landing gear, braking systems, etc., as well as rocket attitude control systems, etc.

3.3 Metallurgy

Hydraulic systems in the metallurgical field are often used for the movement and control of smelting equipment, such as steel presses, casting equipment, etc. Hydraulic systems can provide powerfulHigh-quantity, high-precision motion control to meet various needs in the metallurgical process.

Conclusion

Oil pressure, or hydraulic pressure, is an engineering discipline that uses liquids to transmit force and control technology. It realizes the transmission and control of force through the flow of liquid, and is widely used in machinery, aerospace, metallurgy and other fields. The hydraulic system is composed of hydraulic pumps, hydraulic valves, hydraulic cylinders, etc., and uses the pressure of liquid to generate, transmit and control force. The working principle of the hydraulic system is based on Pascal's law. Liquid is pushed into the hydraulic system through a hydraulic pump, the flow and pressure of the liquid are controlled through hydraulic valves, and the pressure of the liquid is converted into mechanical motion through a hydraulic cylinder. Hydraulic systems are widely used in engineering machinery, aerospace, metallurgy and other fields to provide efficient and precise power transmission and control for various equipment and processes.