附件242 Chapter I Introduction to Hydraulic and Pneumatic Transmission 1.Power transfer Let us take the hydraulic pressure in the actuator as p F Let's note the piston area of actuator as A.the A total thurnst on it as the thrust on the small piston of pump is F scalled the hydranli 5=p4=h4=4=() 4 is the piston area of pump. Thus We can get the first important character that the working pressure in a hydraulic system depends on the outside Chapter I Introduction to Hydraulie and Pnem When we neglect the compressibility,leaking and 2.Motion transfer deforn action,. The volume of displacement is equal to the volume drawn into and then: Lets note the piston moving distance in the SA-S,A2 (1-3) Divided by the moving time t on both sides on the above formula, we have: Where v,and v,are noted the average speed of lvdraulic pum and hydraulic actuator 1=vd=v42=9 边the pump and q is the oil the actuator. We can get the second impo tant law that the motion speed of piston in actuator depend on the inle fow rate,but is independent of the outside load. Hydranlic oil pressure and the flow rate are the two main parameters in the hydrauli Smn-mp l.3 Composition of Hydraulic Transmission System(液压传动系统的组成)附件 24.2 1.3 Composition of Hydraulic Transmission System （液压传动系统的组成） 5