Characteristics of pneumatic technology

1.3 Characteristics of pneumatic technology

Both hydraulics and pneumatics use fluid as the working medium, and convert the energy of fluid into the mechanical movement of actuating elements. Their control elements participate in the same way as the equipment automation. And because there are many similarities in component names, structures, specifications, etc., it is easy to cause the illusion of using the same method to handle. In fact, it is inappropriate to apply hydraulic technology to pneumatic technology intact. Due to different media, the structure of components and the composition method of the system are different.

To correctly select the transmission type, you must understand the characteristics of various transmission technologies and control technologies. See Table 1-1 and Table 1-2.

Table 1-1 Characteristics of Different Transmission Technologies

project		hydraulic technology	Electrical technology	Pneumatic technology
Energy transmission	transmit	Limited and slow	Fast and long distance transportation	Limited and slow
	Comparative economic transmission distance	The maximum is about 100m	There are no restrictions	The maximum is about 1000m
	Transmission speed	2~6m/s	About 300000 km / S	10~15m/s
	storage	Possible but limited	difficulty	simple
	Energy costs	high	low	Very high
transmission	The generation of linear motion	be prone to	Cumbersome and expensive	be prone to
	Working speed	It can reach about 0.5m/s		It can reach about 4m / s, and even higher in special cases
	power density	Very high	low	low
	Output force	great	It’s quite expensive	Limited, up to 20000 n
	Maximum stroke	It can be more than 1m long	Restricted	Up to 2M
	Change of output force	Simple and accurate	expensive	simple
	Change in speed	Simple and accurate	expensive	simple
	efficiency	high	low	low
	Generation of rotational motion	simple	simple	simple
	speed	Restricted	Restricted	High, up to 50000r / min
	Output torque	great	large	Small
	Change of speed	Simple and accurate	expensive	It’s simple
	Change of torque	Simple and accurate	expensive	simple
	efficiency	high	high	low
Laying of roads		Trivial	simple	Very simple
overload protection		Fully equipped	Generally not	Fully equipped
Explosion proof of body		Incomplete	No	have

Table 1-2 Characteristics of various control technologies Hydraulic technology

control technology		Hydraulic technology (3 ~ 8barp)	50 ~ 500mbar pneumatic technology	Electrical technology	electronic technique
Signal transmission	In general, the transmission distance is more economical than the transmission speed	Slow and limited, about 100m 20 ~ 70m / s	Slow and limited, about 300m, up to 300m / s	It’s fast and no problem. It’s infinitely restricted to 30000km / s
Control element	Action time, dimension and life	0.1ms small very high	1ms is very small, very high	10ms high	1ms is very small, very high
Feeling of the environment	Dust moisture external electromagnetic field heat	It’s not sensitive. It’s not sensitive. It’s not sensitive	It’s sensitive. It’s not sensitive. It’s not sensitive. It’s not sensitive	Very sensitive, very sensitive, insensitive and insensitive	Sensitive very sensitive very sensitive
Loop laying		It’s simple	It’s simple	simple	simple
Scale of control system		Restricted	Restricted	Restricted	Limited in practical use
Use and maintenance		be prone to	easily	easily	For professionals, it is easy to use and maintain
①1bar=105Pa.