Under the epidemic situation, how to select the type of air compressor for mask machine?

Recently, many people have consulted about the use of air compressors for masks, but they do not know how to choose a suitable air compressor for masks. Demacia will show you how to choose the air compressor for the mask machine:

The air consumption of the air cylinder used with the mask machine equipment can be divided into the maximum air consumption and the average air consumption.

1. The maximum air consumption is the air browsing required when the cylinder moves at the maximum speed, which can be expressed as:

qr=0.0462D^2*um(P+0.102)

For example, if the cylinder diameter D is 10cm, the maximum speed is 300mm/s, and the service pressure is 0.6MPa, the maximum air consumption of the cylinder qr=0.046*10^2*300* (0.6+0.102) =968.76 (l/min), so the solenoid valve with CV value of 1.0 or effective cross-sectional area of about 18mm can meet the flow requirements. If the service pressure of the cylinder is 0.5MPa and the maximum speed is 200mm/s, the maximum air consumption of the cylinder is qr=553.84.

If the cylinder diameter D is 50cm, the maximum speed is 300mm / s.

When the service pressure is 0.6MPa, the maximum air consumption of the cylinder is qr=242.19, so the CV value of about 0.3 can be selected.

Ps: unofficial empirical formula: maximum air consumption = square of cylinder diameter (in cm) multiplied by the coefficient 10 (at this time, the use pressure is 0.6MPa, and the maximum speed is 300mm / s)

2. The average air consumption is the air flow consumed by the cylinder in a working cycle of the pneumatic system. It can be expressed as:

qca=0.0157（D^2*L+d^2*ld）N(p+0.102)

In the above formula,

QCA: average air consumption of cylinder, l/min (ANR);

N: The working frequency of the cylinder, that is, the number of reciprocating cycles of the cylinder per minute, one reciprocating cycle is one cycle, cycle /min;

50: Stroke of cylinder, cm;

d: The inner diameter of the piping between the reversing valve and the cylinder; cm

LD: length of piping, cm.

For example, if the cylinder diameter D is 100mm (10cm) and the stroke L is 100mm (10cm), the action frequency n is 60 cycles /min, d=10mm (1cm), ld=60mm (6cm),

qca=0.0157（D^2*L+d^2*ld）N(p+0.102)=0.0157*(10^2*10+1^2*6))*60*(0.6+0.102)=666.5251704L/min(ANR).

The average air consumption is used to select the air compressor and calculate the operation cost.

The maximum air consumption is used to select the size of air handling components, control valves and piping.

The difference between the maximum gas consumption and the average gas consumption is used to select the volume of the gas tank.