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Hydraulic Control System Pneumatic: Summary and application range

2014-01-07

Hydraulic control system - including pneumatic control components and actuators are connected together into a complete system to perform the required tasks posed. The system is described as shown.

Hydraulic control system - including pneumatic control components and actuators are connected together into a complete system to perform the required tasks posed . The system is described as shown .

In terms of structure and function :

In which:

Input Signal : buttons , switches , switch out the sensor .

Part information processing : processing the received signal in accordance with a defined logic rules , changing the status of the controller element : valve logical And , Or , Not , Yes , Flip - Flop , relays , ...

Element control : control the energy flow ( flow , pressure ) upon request , to change the state of the actuators : Pressure control valve , reversing valve , throttle , clutch , ...

Actuators : change the status of the control subjects , the quantity of the controller output : pneumatic cylinders , pneumatic motors .

Energy control : consists of information and capacity

Pieces of information :

- Electronics

- Electrical and Mechanical

- Gas

- Hydraulics

- Optical

- Biology

Part of the interest :

- Phone : small capacity , control activities easier , faster

- Gas : medium capacity , inertia , high speed .

- Water : large capacity , low inertia - easy stable , low speed .

The types of controls:

Open-loop control :

Open-loop control system is no comparison between the output signal to the input signal , the actual value obtained and the value should not be adjusted to achieve treatment . Figure below shows the control system speed hydraulic motor .

Closed-loop control ( feedback ) :

The system output signal response for comparison with the input signal . The difference of the two input signals to be communicated to the control device , so the device generates a control signal is applied to the object that controls the actual value are achieved as desired . The figure below illustrates the position control system of rolling motion hydraulic cylinder piston .

Structure pneumatic hydraulic circuit

A hydraulic system - pneumatic either closed or open , then basically it contains elements , elements described as shown below .

Depending on the operational tasks of the control subjects , the complexity of the control system , which can be analyzed , select the appropriate element for the design of control systems and dynamical systems .

The scope of application of hydraulic control - Pneumatic :

Pneumatic :

Pneumatic control systems are widely used in the fields in which the problems likely danger : as fire, toxic ( eg clamping fixtures plastic parts ) or be as used in mechanical engineering level workpiece , or the environment as clean technology manufacturing electronic devices . Also what makes the system with compressed air is used in the food production chain : packaging , such as automatic wash , pour water into the bottle , ... , in the transportation equipment and inspection conveyors , lifts industrial boiler equipment , packing , packaging , printing , product classification and the chemical industry , medicine and biology .

Hydraulics :

Hydraulic control systems used in industrial sectors such as : pressure molding machines , lifting machines , machine tools , machine processing , agricultural machinery , construction machinery , ...