液压与气压传动（英汉双语）第2版教学课件作者陈淑梅第10章Chapter_10课件.pptVIP

Chapter 10 Air Supply Devices and  Pneumatic Components A pneumatic system incorporates the following components and devices: (1)Air supply devices (2) Actuators (3)Control elements (4)Pneumatic attachments 10.1 Air Supply Devices 10.2 Pneumatic Pneumatic Attachments 10.3 Pneumatic Actuators 10.4 Pneumatic Regulating Valves 10.1 Air Supply Devices 10.1.1 Pressure generation devices 10.1.2 Purification and storing devices and equipments compressed air 10.1.3 F.R.L Combination Air supply devices are used to provide compressed air (with a certain lever of pressure, flow rate and purification) for pneumatic system. An air supply device incorporates four parts: (1) pressure generation devices; (2) air regeneration; (3) storing devices; (4) air lines and F.R.L combination. Fig. 10-1 Schematic view of air supply system 10.1.1 Pressure generation devices 1. Compressor classification Fig. 10-2 Basic compressor type 2. Working principles of compressors 10.1.2 Purification and storing devices and equipments compressed air 1.Demands for better quality of compressed air Fig. 10-5 Strike and return with ring revolving type moisture separator Fig. 10-6 Receiver Fig.10-7 Heatless regeneration dryer 10.1.3 F.R.L Combination 1. Air filter (2)Performance 4)Flow rate characteristics: the difference of input and output pressures must be less than 5% at a rating flow rate. 2. Oil mist lubricator (1)Operation and construction (2)Main performance and indices （2）Main performance 1) Pressure characteristics: describes the fluctuation of output pressure p2 with the input pressure p1 under a given output flow rate q. Fig.10-13a shows its characteristic curves. 2) Flow rate characteristics: describes the fluctuation of the output pressure p2 with output flow rate q under a given input pressure p1. Fig.10-13b shows its characteristic curves. a) Pressure characteristics b) Flow rate cha