附件24.3 的wO卡 Problem 7-11 7-12 The working cycle of a hydraulic system is:quick feed-working feed-stop at dead block position →quick retra tion.The pressure switch ptisstppd byte d nd then the pon retets u actuate solenoid 2Y when the (1)How to determine the acting pressure of the pressure switch? (2)If the circuit is changed into a speed regulation circuit in the oil retur path with a throttle valve,how to install the pressure switch?Illustrate its operating principle. 2 死指板停 w图 l-Quick feed(快进 2-Working feed(工进) 3-Quick retract(快退) 3 P Problem7-12 7-13 Which circuits are inluded in the circuit shown in the figure?What are the functions of cartridge valves 1,2,3,4,and 5 in the circuit附件 24.3 Problem 7-11 7-12 The working cycle of a hydraulic system is: quick feed→working feed→stop at dead block position→quick retract→stop at original position. The pressure switch signals to actuate solenoid 2Y when the piston is stopped by the dead block, and then the piston retracts quickly. (1) How to determine the acting pressure of the pressure switch? (2) If the circuit is changed into a speed regulation circuit in the oil return path with a throttle valve, how to install the pressure switch? Illustrate its operating principle. Problem 7-12 7-13 Which basic circuits are included in the circuit shown in the figure? What are the functions of cartridge valves 1, 2, 3, 4, and 5 in the circuit?