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Views: 110 Author: Site Editor Publish Time: 2022-06-21 Origin: Site
Fluid power can be complicated. There are many variables to consider when deciding which type of fluid is best to power the project. Do you choose to use oil-type fluid hydraulic drive or compressed air pneumatic drive? The following mainly explains the difference between the two and the variable factors to be considered.
Hydraulic transmission refers to a transmission method that uses liquid as a working medium for energy transmission and control. In the liquid transmission, according to the different forms of energy transmission, it is divided into hydraulic transmission and hydraulic transmission. Hydraulic transmission is mainly a transmission method that uses liquid kinetic energy for energy conversion, such as hydraulic coupling and hydraulic torque converter. Hydraulic transmission is a transmission method that uses hydraulic pressure to convert energy.
The use of hydraulic transmission technology in machinery, such as rodless hydraulic cylinder and compact hydraulic cylinder, can simplify the structure of the machine, reduce the quality of the machine, reduce material consumption, reduce manufacturing costs, reduce labor intensity, and improve work efficiency and work reliability.
1. General industrial hydraulic system, plastic processing machinery (injection molding machine), pressure machinery (forging press), heavy machinery (scrap briquetting machine), machine tool (automatic hexagonal lathe, surface grinder), etc.;
2. Hydraulic system for mobile machinery, construction machinery (excavator), hoisting machinery (car crane), construction machinery (pile driver), agricultural machinery (combine harvester), automobile (steering gear, shock absorber), etc.;
3. Hydraulic system for steel industry, metallurgical machinery (rolling mill), lifting device (lift), roll adjustment device, etc.;
4. Hydraulic systems for civil engineering, flood gates and dam devices (tide protection baffles), riverbed lifting devices, bridge operating mechanisms and mining machinery (rock drills), etc.;
5. Hydraulic system turbines (speed regulating devices) for power plants, etc.;
6. Hydraulic system for special technology, giant antenna control device, measuring buoy, aircraft landing gear retractable device and rudder control device, lifting rotating stage, etc.;
7. Hydraulic systems for ships, deck cranes (winches), bow doors, bulkhead valves, stern thrusters, etc.;
8. The hydraulic system of military industry uses artillery control devices, ship anti-rolling devices, aircraft simulation, etc.
Pneumatic system needs to go through the conversion between pressure energy and mechanical energy when it works. Its working principle is to use an air compressor to generate pressure energy in the air medium, and under the control of the control element, transmit the gas pressure energy to the actuator, and the actuator (cylinder or air motor) completes linear and rotational motion.
There are many types of cylinders on the market, including single acting pneumatic cylinder, double acting pneumatic cylinder, compact air cylinder, pneumatic piston cylinder and spring return pneumatic cylinder, etc.
1. Advantages
The working medium is air, which is easy to discharge and does not pollute the environment.
The air has a low viscosity, which is convenient for long-distance transportation and has low energy loss.
Pneumatic transmission has quick response, simple maintenance, no medium maintenance and supplementary problems, and easy installation.
The energy storage is convenient, and the gas storage cylinder can be used to obtain the air pressure energy.
The adaptability of the working environment is good, and the allowable working temperature range is wide.
It has an overload protection function.
