The main difference between hydraulic circuit and pneumatic circuit
The hydraulic movement position is accurate, the barometric pressure because the compression movement is inaccurate, the hydraulic pressure general movement is slower, the barometric pressure is quicker. Hydraulic power source is generally hydraulic pump, pressure source is generally compressor. Hydraulic force is greater, the pressure is relatively small.
The hydraulic pressure should be returned to the tank, and the pneumatic can be discharged directly into the atmosphere without any waste or pollution!!
I. pneumatic basic circuit is the basic component of pneumatic circuit, and complex pneumatic operation system is composed of one or more basic circuits. Compared with hydraulic, pneumatic circuit has its own characteristics:1, an air compressor can simultaneously supply gas to multiple circuits, while hydraulic pumps generally provide only one loop.2. The compressed air will be discharged into the atmosphere directly after the end of the cycle. No hydraulic drive will be necessary to recover the oil into the tank.3, air senior lubrication performance is poor, need additional oil supply device.Two, through the introduction of the previous articles, we generally understand the hydraulic circuit and the use of pneumatic circuit, as well as related presentations, and then we will explore how the cylinder should be chosen.Standard cylinder selection process is generally based on the needs of the job to determine the type of cylinder, installation forms, working pressure, cylinder and stroke, cylinder standard series and product samples for selection, gymnastics as;1, the cylinder output size of the load by 1.15~2 times to select, and accordingly determine the cylinder bore.2, according to the implementation of the agency's travel requirements to determine the cylinder piston stroke length, usually need to leave the margin of 5-20mm.3, according to the speed of the piston movement, select the appropriate inlet diameter, the greater the value, the faster the speed. In order to make the speed steady, a cylinder with a buffer device can be used.
