Pneumatic System Analysis Software

Pneumatic systems are widely used in today's environment. For designers and engineers, this means that being able to design with pneumatics in mind is critical.














An example: to meet the demand for environmentally friendly fuel systems on automobiles, a fuel vapor management system was created. These systems are simply low-pressure pneumatic systems. In addition, automobile air suspension systems and the rapid development of robotic applications have accelerated the need for analysis of pneumatic systems. The dynamic analysis of pneumatic systems is especially difficult due to the highly compressible characteristics of the medium. HyPneu pneumatic systems analysis software easily handles these complexities so that all the user needs to do is to place a pneumatic icon in the system and tell HyPneu to "run.”















HyPneu empowers the designer to create schematics using its Schematic Editor, take advantage of unequaled simulation capabilities, and set up a customized component database. All of this, plus access to our unparalleled technical support services is included when you invest in HyPneu.

Pneumatic:
වාතරෝධක, වායව, හුළං පුරවනලද

What is The Pneumatic Technology

Pneumatic Technology

Blaise Pascal first discovered the physical behavior of a fluid like air and water. Pascal found that when a force was applied to the end of a container of liquid, the force was transmitted equally in all directions. Pascal also discovered that pressure is equal to force divided by the area on which it acts or the formula:

Force = Pressure x Area




In pneumatics, force is produced by air pressure acting on the surface of a piston or valve. A force of 100 kPa is known as 1 bar. Normal atmospheric pressure ( the force exerted on a square meter of at sea level by a square meter column of air rising from sea level to the outer atmosphere) is approx 101.3 kPa (1.013 bar).

Pneumatic Components

Compressor


Compressors come in many shapes and sizes, but they all work on the same principle. Compressed air is produced in a compressor and stored in the receiver. Air is pumped through a check valve into the lower metal tank called the receiver. When the air inside the receiver reaches the required pressure, a pressure regulating switch turns off the pump.

Pressure control valves control the amount of power produced by the cylinders, which converts the potential energy of the compressed air into kinetic energy at the device. Pneumatic control valves direct the air flow, while flow control valves regulate the speed of the air.

Reservoir(s)

Store compressed air at 120 psi
Top up before each match
Slow leaks can decrease pressure between pit and field
Tether robot beside field to top up pneumatics

Regulator

Allows air from reservoirs to flow to rest of pneumatic system
Limits pressure in valves, cylinders to 60 psi

Pressure Sensor

Detect pressure in pneumatic system
Indicate whether system is above or below a set pressure
Can be calibrated
Usually two (one set for 115 psi, one set for 105 psi)
Pressure below 105 psi: compressor on
Pressure above 115 psi: compressor off

Pneumatic Cylinders

There are many types of pneumatic cylinders, but we will discuss just two.
The single action spring return cylinder and the double action cylinder.



The single action spring return cylinder extents when air pressure is applied to the diameter area of the cylinder. The cylinder will stay extended until the pressure is relieved, and the spring returns the cylinder rod to the normal position.

The Force must be higher than the spring return pressure and any load it is requires to move. If the Area is 3.14 square inches (diameter of the cylinder is 2 inches so a 1 inch radius squared times 3.14 or Pi) and the Pressure is 100 pounds per square inch then the following calculation will give you the force.

1 X 3.14 X 100 pounds per square inch = 314 pounds of force.

The spring requires 50 pounds of force.

314 - 50 = 264 pounds. The cylinder without friction would be able to lift 264 pounds of load.

The double action cylinder works in a similar way, but because no spring is used to return the cylinder rod a total of 314 pounds of force is available for lifting. The double action cylinder uses air on both sides of the cylinder to move the cylinder rod. It requires a different type of valve to shift the air flow and move the cylinder rod back and forth. Notice how the air is exhausted from each of the two cylinders. One exhausts out of the same port it entered, while the other exhausts out a different port altogether.

Cylinder Tips

If you need the piston to stay extended or retracted, add a mechanical latch Be careful to ensure the piston rod cannot get bent Hard to get locknuts/lock washers in large sizes, so nuts on pistons likely to come loose