In choosingCompressorPneumatic system, the main consideration for the working pressure and flow, air sources, pneumatic system working pressure should be higher than the maximum working pressure of about 20% higher because the need to consider gas pipeline along the way losses and partial losses. If some of the work of local pressure to low pressure reducing valve can be used to supply. Rated discharge pressure air compressor is divided into low-voltage (0.7 ~ 1.0MPa), medium pressure (1.0 ~ 10MPa), high-voltage (10 ~ 100MPa) and ultra-high pressure (100MPa or above) can be chosen according to actual demand. Common use of pressure generally 0.7-1.25. First, according to the characteristics of air compressor requirements, choose the type of air compressor. Then according to the work required pneumatic system pressure and flow of two parameters, determine the compressor's output pressure pc and inhalation flow rate qc, the final selected air compressor models.
(1) air compressor output pressure pc
pc = p + Σ △ p
pc:CompressorThe output pressure
p: pneumatic actuators, the maximum working pressure
Σ △ p: pneumatic system, the total pressure loss.
Under normal circumstances, and the other Σ △ p = 0.15 ~ 0.2MPa.
(2) air compressor suction flow qc
No cylinders, qb = qmax
Set cylinders, qb = qsa
qb: pneumatic system provides the flow of
qmax: maximum air consumption pneumatic system
qsa: pneumatic system, the average air consumption
Inhaled air compressor flow rate, qc = kqb
qc: compressor suction flow rate
k: correction factor. Major consideration pneumatic components, pipe joints, etc. of the leakage, pneumatic system, air consumption of the estimation errors, more than the simultaneous use of pneumatic fittings utilization and increase the possibility of new factors such as pneumatic devices. In general k = 1.5 ~ 2.0.
(3) The air compressor power P
p = (n +1) * k * p1 * qc * (pc/p1 )^{[( k-1) / [(n +1) * k] -1) / (k-1) * 0.06
本文转自：China Industry News
本文链接：http://news.made-cn.org/post/Buy-air-compressor-should-be-noted.html