1 and 1 a. V. A. L. A. A. (china) limited systems agency 2 basic knowledge of aerodynamics 2 basics of aerodynamics 2 basics of aerodynamics 3 a. S. And a. S. 4 a. E. P. 5 a. M. 6 a. M. C. 7 a. E. R. 3 a. M. Aerodynamics (pneumatic) is the abbreviation of “aerodynamics” or “pressure motion and control” and is a mode of movement that uses gas pressure to achieve motion and power. The rapid development of the aerodynamic technologies permeates the national economy in various fields: from the blue sky to underwater, from military to civilian, from heavy to light industries
2. Physical motion and control techniques. 5 the history of aerodynamics began in 1776 when john wikinson invented an air compressor that could generate a pressure around the atmosphere. In 1880, people used the cylinder for the first time to make a gas brake, and it was successfully used on the train brake. In the early 1930s, aerodynamic technology was successfully applied to the opening of automatic doors and the auxiliary actions of various machines. It entered into the 1960s, especially in the early 1970s, and with the development of industrial mechanization and automation, the widespread application of aerodynamic technologies in various areas of production self-mobilization resulted in modern aerodynamic technologies. 6 aerodynamic applications used in the production of chemical products used in places where humans are unfit to reach, such as high temperatures and dangerous labour, in high-speed, repetitive motor machinery, in agricultural equipment, in the food industry, in the mechanical industry, in cutting, cutting and cutting
In the field of medicine, robotics, space equipment, medium 71, power element: power element: a gas source device, which functions to transform the mechanical power of the original motive into an air pressure power, providing power to the system. 2. Executing element: an execution component: an air tank or a gas motor whose function is to convert the pressure power of the gas to mechanical energy, output power and speed or rectangular and rotational motion to drive the load for straight or rotating motion. Control elements: control elements: elements used to control pressure, flow and flow direction to regulate compressed air and the working procedures of the system implementing agencies. Auxiliary elements: assistive components: assistive fittings required to ensure the proper functioning of the system, including tubes, connections, gas tanks, filters, etc. 8 aerodynamic system schematic 9 aerodynamic system schematic gas tank 10 aerodynamic advantage: 1, discharge into the atmosphere with the rear air, without having to put back the tubes, without contamination
4. The environment does not have to have a gas tube, does not pollute the environment, 2 does not have little resistance to air flow inside the tube, the pressure loss is small, the transport pressure loss is small, the transport of 3 is easy to react quickly, the movement is fast, the maintenance is simple, the pipes are not easily blocked 4 does not have a simple structure of aerodynamic elements, makes it easier to manufacture, standardize, serialize, universalize 5 and the aerodynamic systems in poor working environments have better safety and reliability than the hydraulic reliability than the hydraulic pressure etc. 6
5. Low, low output power, 2 slow air signal transmission, inappropriate for high-speed transmission, 3 in circuits, high exhaust noise, air compressability, stable movement in case of load changes 12 advantages: 1 small size, high output 2 no overload risk 3 output power adjustment easy to adjust 4 easy automation 13 hydraulic stress 1 takes care of discharges of oil, in addition to contamination of workplaces, and fire risks. When oil temperature rises, the viscosity drops, the viscos rises, and when the viscosity changes, the flow changes, making the speed unstable. 3 the system converts motor machinery to liquid pressure, and liquid pressure to mechanical energy to function, which is lost twice, and energy is less efficient than conventional machinery. 4 hydraulic pressure
6. The system uses a wide variety of control valves, connections and tubes, and in order to prevent leakage losses, the processing accuracy of components is higher. Aerodynamics compared to other aerodynamics trends in aerodynamics, electrical integration: electrical integration: microelectronics and aerodynamics combine to form an integrated electrical aerodynamics system for small valve cylinders of pc interfaces. At the same time, self-adaptation control aerodynamic elements, such as pressure-rate valves, flow-scale valves, etc., have come to light, allowing gas-activation technologies to move from previous switch controls to high-precision feedback controls, increasing positioning accuracy to 0. 1 0. 01. Electrical integration has infiltrated the plant itself in the production areas of processing, assembly, testing, etc. 16 trends in aerodynamic technology 2, miniaturization, light quantification: miniaturization, light quantification: aerodynamic technology applications in fields such as electronics, industrial automation, aerodynamics
7. Items shall be scalable and lightly quantified. New technologies and applications of new materials have led to the miniaturization and light quantification of aerodynamic elements. 3 composite integration: composite integration: multifunctional composite and integrated components emerge in order to save space, reduce assembly, reduce assembly, increase efficiency, e. G., the required number of purpose valves on an integrated plate, with valve cylinders, etc. 17 trends in gas-activated technology 4, non-oiled: non-oiled: a large number of non-oil-rich elements pre-added to lubricating and lubricating are available to adapt to pollution-free requirements in food, medicine, electronics, textiles, etc. At the same time, oil-free lubricating elements are being developed that are made of self-moluting materials and can work without lubrication. 5 low power: low power: in order to be directly associated with micromachines, program controllers, electromagnetic valves must achieve low power. The power of the electromagnetic valve has been reduced to 1 w, or even 0. 5 w. 18 aerodynamics
Trends in development 6, high accuracy: high accuracy: position control accuracy has increased from the past mm to 0. 1 mm. 7. Quality: quality: due to new materials, the application of new technologies and the improvement of processing processes, the life of the electromagnetic valves can be over 30 million times, and the viability of the cylinders has reached 20006,000 km. High speed: high speed: increasing the frequency of work of electromagnetic valves and the speed of cylinders is important for increasing productivity. Electromagnetic valves can operate at a frequency of up to 25 hz, increasing the speed of the cylinder from 1 m/s to 3 m/s. 9 higher: higher: higher: multiple to dozens of times greater output power can be increased with a lever-extension structure or a gas booster. 19 thinking, how does aerodynamics transform energy? What are the main components of the aerodynamic system? Example: brief description of the main features of the aerodynamic system. Look around you and give an example of how the aerodynamic system works。
